National Library of Energy BETA

Sample records for ne sd mn

  1. 19Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ne β+-Decay Evaluated Data Measurements 1939WH02: 19Ne. 1952SC15: 19Ne. 1954JO21: 19Ne. 1954NA29: 19Ne. 1957AL29: 19Ne. 1957PE12: 19Ne. 1958WE25: 19Ne. 1960JA12: 19Ne; measured not abstracted; deduced nuclear properties. 1960WA04: 19Ne; measured not abstracted; deduced nuclear properties. 1962EA02: 19Ne; measured not abstracted; deduced nuclear properties. 1964VA23: 19Ne; measured not abstracted; deduced nuclear properties. 1968GO10: 19Ne; measured T1/2. 1972LE33: 19Ne; measured K/β+ ratios.

  2. 18Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ne β+-Decay Evaluated Data Measurements 1954GO17: 18Ne. 1961BU05: 18Ne; measured not abstracted; deduced nuclear properties. 1961EC02: 18Ne; measured not abstracted; deduced nuclear properties. 1963FR10: 18Ne; measured not abstracted; deduced nuclear properties. 1965FR09: 18Ne; measured not abstracted; deduced nuclear properties. 1968GO05: 18Ne; measured Eγ, Iγ; deduced Iβ, log ft. 18F deduced levels, branching ratios. 1970AL11: 18Ne; measured T1/2; deduced log ft, β-branching. 1970AS06,

  3. BooNE: About BooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    BooNE Collaboration BooNE Experiment BooNE vs MiniBooNE Interesting Facts Posters Virtual Tour Picture Gallery News Articles BooNE photo montage Technical Information BooNE...

  4. 15Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ne Ground-State Decay Evaluated Data Measured Ground-State Γcm for 15Ne Adopted value: 0.59 MeV (2014WA09) Measured Mass Excess for 15Ne Adopted value: 40215 ± 69 keV (2014WA09) Measurements 2014WA09: C(17Ne, 2p)15Ne, E = 500 MeV/nucleon; measured reaction products; deduced fractional energy spectra, J, π, energy levels, atomic mass excess. 15Ne(2p); measured decay products, Ep, Ip; deduced implications for 13O + p + p system. Back to Top Back to Ground-State Decays

  5. 17Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ne β+-Decay Evaluated Data Measurements 1964MC16: 17Ne; measured not abstracted; deduced nuclear properties. 1966HA22: 17Ne; deduced log ft. 1967ES02: 17Ne; measured not abstracted; deduced nuclear properties. 1967FI10: 17Ne. 1971ESZR, 1971HA05: 17Ne; measured β-delayed proton spectra, Eγ, Iγ, T1/2, pγ-coin; deduced log ft. 17F deduced levels, antianalog state, isospin mixing. 1988BO39: 17Ne(β+p), (β+α); measured T1/2, β-delayed E(p), E(α), I(p), I(α), β(particle)-coin. 17Ne deduced

  6. 16Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ne Ground-State Decay Evaluated Data Measured Ground-State Γcm for 16Ne Adopted value: 122 ± 37 keV (1993TI07) Measured Mass Excess for 16Ne Adopted value: 23996 ± 20 keV (2003AU02) Measurements 1971MAXQ: 16O(π+, π-); measured particle spectra, σ. 1977HO13: 16O(π+, π-), E = 145 MeV; measured σ; deduced Q. 16Ne deduced mass excess. 1977KEZX: 20Ne(α, 8He), E = 118 MeV; measured σ. 16Ne deduced levels, mass excess. 1978BU09: 16O(π+, π-), E = 145 MeV; measured σ. 16Ne deduced mass

  7. Category:Pierre, SD | Open Energy Information

    Open Energy Info (EERE)

    SVFullServiceRestaurant Pierre SD Black Hills Power Inc.png SVFullServiceRestauran... 68 KB SVHospital Pierre SD Black Hills Power Inc.png SVHospital Pierre SD B... 67 KB...

  8. SciBooNE/MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ž. Pavlović Los Alamos National Laboratory Fermilab Users' Meeting, 2012 SciBooNE/MiniBooNE 2 Outline * Booster Neutrino Beamline * SciBooNE & MiniBooNE experiments * New results - MB Updated neutrino appearance analysis - MB Antineutrino appearance analysis - MB Joint Neutrino & Antineutrino appearance analysis - Joint SciBooNE/MiniBooNE numubar disappearance analysis * Future prospects 3 Booster Neutrino Beam * Horn focused beam/8GeV protons from Booster * Horn polarity → neutrino

  9. NE-23:

    Office of Legacy Management (LM)

    1 , : -2 rn; NE-23: 4 Whitr%; Ms. Theresa Schaffer 3315 S. Emerald Avenue Chicago, Illinois 60616 Dear Ms. Schaffer: . -. r ;-, .4r.-,. , ' P?;c \ \ ; . EC.. ., . The Department of Energy (DOE), as part of its Formerly Utilized Sites Remedial Action Program (FUSRAP), has reviewed information on the former General Services Administratlon 39th Street Werehouse, Chicago, Illincis, to determine whether it contains residual radioactivity traceable to activities conducted on behalf of the Manhattan

  10. NE-20

    Office of Legacy Management (LM)

    hi v. !&-2:. /qL lo 1 OCT 2 9 1984 NE-20 -. Authorization for Remedial Action of the Ashland 2 Site, Tonawanda, New York f! Joe LaGrone, Manager Oak Ridge Operations Office Based on the Aerial Radiological Survey (Attachment 1) and a "walk-on" radiologlcal survey (Attachment 2 , excerpted from the ORNL draft report "Ground-Level Investigation of Anomalous Gamma Radiation Levels in the Tonawanda, New York, Area," January 1980), the property identified as Ashland 2 is

  11. MicroBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE MicroBooNE Investigating the field of high energy physics through experiments that ... R. Dharmapalan et al. MiniBooNE Collaboration, arXiv:1211.2258 hep-ex (2012).

  12. BooNE Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    research universities, predominantly undergraduate institutions, as well as a high school physics teacher. List of Collaborators The BooNE Collaboration The BooNE Collaboration...

  13. BooNE Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Experiment Goals of BooNE BooNE in a Nutshell Making Neutrinos Detecting Neutrinos schematic of BooNE experiment A sample event (3M animated PDF file) A cosmic ray event as displayed by the MiniBooNE detector.

  14. MicroBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE MicroBooNE Investigating the field of high energy physics through experiments that strengthen our fundamental understanding of matter, energy, space, and time. Get Expertise Rajan Gupta (505) 667-7664 Email Bruce Carlsten (505) 667-5657 Email MicroBooNE schematic drawing Figure 1: A schematic drawing of the MicroBooNE liquid argon TPC detector. The main goals of the MicroBooNE experiment are: (1) to demonstrate the capabilities of a liquid argon TPC in the reconstruction of neutrino

  15. OPTIONAL I-""... ..o SD

    Office of Legacy Management (LM)

    OPTIONAL I-""... ..o SD , * ' y)IP-lW ' a * UNITED S T A T E S COVEKNMENT TO : Files DATE: September 25, 1962 M o m 4' Materials Branch; Division of Licensing & Regulation SUBJECT: PRE-LICENSING VISIT TO THE CONTEMPORARY METALS CORPORATION PROPOSED FACILITY AT HAZELWOOD, M ISSOURI, AND RESIDUE STOCKPILES AT ROBERTSON, M ISSOURI, DOCKET NO, 40-6811 The Contemporary Metals Corporation was awarded a contract by the AEC for the removal of uranium -bearing residues from stock- pile

  16. BooNE: Posters

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Posters What's a Neutrino? How neutrinos fit into our understanding of the universe. Recipe for a Neutrino Beam Start with some protons... concocting the MiniBooNE beam. The MiniBooNE Detector Tracking the traces of neutrino interactions. Of Neutrino Mass, and Oscillation What oscillates in neutrino oscillations, and why it matters

  17. BooNE: Picture Gallery

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Picture Gallery BooNE Collaboration Members of the BooNE collaboration Civil Construction Pictorial progress of BooNE civil construction work Detector Installation Pictorial progress of MiniBooNE detector installation BooNE Scrapbook A selection from BooNE Audio Gallery Horn Concerto The Horn Concerto is a recording of the BooNE horn and the NuMI horn sounding at the same time. The rat-a-tat is BooNE; the syncopated boom is NuMI.

  18. 20Ne Cross Section

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    p, X) (Current as of 05/15/2012) NSR Reaction Ep (MeV) Cross Section File X4 Dataset Date Added 1981DY03 20Ne(p, p'γ): σ for production of γ-rays threshold - 23 1.63-MeV γ-rays X4 03/15/2011 20Ne(p, pαγ): σ for production of γ-rays threshold - 23 6.13-MeV γ-rays 1975RO08 20Ne(p, γ): S-factors 0.37 - 2.10 Direct Capture (DC) → 332-keV state, DC → 2425-keV state, tail of 2425-keV state X4 04/19/2011 20Ne(p, γ): differential σ at θγ = 90° DC → 332-keV state, 332-keV state →

  19. MiniBooNE

    SciTech Connect (OSTI)

    Mahn, Kendall Brianna Mcconnel; /Columbia U.

    2007-03-01

    MiniBooNE is a short baseline neutrino experiment designed to confirm or refute the LSND observed excess of electron anti neutrinos in a muon anti neutrino beam. The experimental setup, data samples, and oscillation fit method are discussed. Although the result was not public at the time of the talk, MiniBooNE has since published results, which are discussed briefly as well.

  20. 20Ne Cross Section

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20Ne(α, X) (Current as of 02/08/2016) NSR Reaction Eα (MeV) Cross Section File X4 Dataset Date Added 1983SC17 20Ne(α, γ): deduced S-factor of capture σ 0.55 - 3.2 X4 09/15/2011 1997WI12 20Ne(α, γ): deduced primary transitions yield 1.64 - 2.65 X4 09/15/2011 1999KO34 20Ne(α, γ): γ-ray yield for the transition 1.9 - 2.8 g.s. 01/03/2012 1369 keV g.s. 10917 keV g.s., 1369 keV 11016 keV g.s. 1975KU06 20Ne(α, γ): σ 2.5 - 20 X4 09/15/2011 1968HI02 20Ne(α, γ): σ 3 - 6 X4 09/15/2011

  1. BooNE: Interesting Facts

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Interesting Facts About the BooNE experiment: BooNE is the only experiment to search the entire range covered by the LSND oscillation signal. First proposed in 1997, BooNE will be ready to collect data in summer, 2002. The BooNE collaboration is small by high energy physics standards, having 65 physicists from 13 instiutions. If BooNE detects a supernova, it will send an automatic signal to telescopes around the world describing its position. BooNE collaboration - click to enlarge About the

  2. BooNE versus MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    by the Los Alamos LSND experiment. MiniBooNE represents the first phase for the BooNE collaboration and consists of a 1 GeV neutrino beam and a single, 800-ton mineral oil...

  3. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Picture Gallery BooNE Collaboration Members of the BooNE collaboration Civil Construction Pictorial progress of BooNE civil construction work Detector Installation Pictorial...

  4. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Booster Neutrino Experiment (BooNE) Goals of BooNE BooNE in a Nutshell Making Neutrinos Detecting Neutrinos

  5. head_sd_logo.gif | OSTI, US Dept of Energy Office of Scientific and

    Office of Scientific and Technical Information (OSTI)

    Technical Information head_sd_logo.gif

  6. Basin Play State(s) Production Reserves Williston Bakken ND, MT, SD

    U.S. Energy Information Administration (EIA) Indexed Site

    tight oil plays: production and proved reserves, 2013-14 million barrels 2013 2013 Basin Play State(s) Production Reserves Williston Bakken ND, MT, SD 270 4,844 387 5,972 1,128 Western Gulf Eagle Ford TX 351 4,177 497 5,172 995 Permian Bone Spring, Wolfcamp NM, TX 21 335 53 722 387 Denver-Julesberg Niobrara CO, KS, NE, WY 2 17 42 512 495 Appalachian Marcellus* PA, WV 7 89 13 232 143 Fort Worth Barnett TX 9 58 9 47 -11 Sub-total 660 9,520 1,001 12,657 3,137 Other tight oil 41 523 56 708 185 U.S.

  7. US NE MA Site Consumption

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NE MA Site Consumption million Btu 0 500 1,000 1,500 2,000 2,500 3,000 US NE MA ... 8,000 10,000 12,000 US NE MA Site Consumption kilowatthours 0 250 500 750 1,000 ...

  8. Microsoft Word - SD 351-1 FINAL.doc

    National Nuclear Security Administration (NNSA)

    Supply Management NNSA SUPPLEMENTAL DIRECTIVE Approved: 02-05-09 MANAGEMENT AND OPERATING CONTRACTOR SERVICE CREDIT RECOGNITION NATIONAL NUCLEAR SECURITY ADMINISTRATION Office of Acquisition & Supply Management NA SD O 350.1 NA SD-1 O 350.1 1 02-05-09 MANAGEMENT AND OPERATING CONTRACTOR SERVICE CREDIT RECOGNITION 1. PURPOSE. The objective of this Supplemental Directive is to address Management and Operating (M&O) contractor service credit recognition for employees transferring to a

  9. DOE - Office of Legacy Management -- Edgemont Mill Site - SD 01

    Office of Legacy Management (LM)

    Edgemont Mill Site - SD 01 FUSRAP Considered Sites Site: Edgemont Mill Site (SD.01) Licensed to DOE for long-term custody and managed by the Office of Legacy Management Designated Name: Edgemont, South Dakota, Disposal Site Alternate Name: Edgemont Mill Site Ore Buying Station at Edgemont Location: Edgemont, South Dakota Evaluation Year: Site Operations: Site Disposition: Uranium Mill Tailings Radiation Control Act (UMTRCA) Title II site Radioactive Materials Handled: Primary Radioactive

  10. The MicroBooNE Experiment - Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE In the News MicroBooNE internal newletters (password protected) National Lab Science Day (public debut of virtual MicroBooNE), Fermilab News, 042916 MicroBooNE Project ...

  11. The MicroBooNE Experiment - Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The DOE Tours MicroBooNE! - Nov. 27, 2012

  12. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Booster Neutrino Experiment (BooNE) BooNE vs MiniBooNE Interesting Facts Posters Virtual Tour Picture Gallery News Articles Technical Information BooNE Proposal Original...

  13. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Progress in Delivering Beam to MiniBooNE

  14. NE-23 W

    Office of Legacy Management (LM)

    >:-1. ,- '"CC3 . ' NE-23 .+ W h itm~ l-l& Mr. Victor 3. Canilov, Director Museum of Science and Industry East 57th Street and Lake Shore Drive Chicago, Illinois 60037 Dear kr. Danilov: The Department of Energy (DOE), as part of its Formerly Utilized Sites Remedial Action Program (FUSPSIP), has reviewed information on the Museum cf Science and Industry, Chicago, Illinois, to determine whether it contains residual radioactivity traceable to activities conducted on behalf of the

  15. UPdate THE NE

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    UPdate THE NE January 2014 Edition U.S. Department of Energy's Nuclear Energy University Programs It's not every day graduate students get to meet one of nuclear energy's most important decision makers. Integrated University Program (IUP) Fellows had this opportunity at the 2013 Winter American Nuclear Society (ANS) Meeting this past November in Washington, D.C. Department of Energy Assistant Secretary for Nuclear Energy, Dr. Pete Lyons, greeted IUP Fellows in a special meeting to discuss

  16. NNSA Supplemental Guidance: NA-1 SD G 1027 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Supplemental Guidance: NA-1 SD G 1027 NNSA Supplemental Guidance: NA-1 SD G 1027 Guidance on using Release Fraction and Modern Dosimetric information consistently with DOE STD ...

  17. MiniBooNE E. D. Zimmerman

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SciBooNE Detector TargetHorn SciBooNE constraint reduces error at MiniBooNE * Flux errors become 1-2% level: negligible for this analysis * Cross-section errors reduced, but...

  18. MiniBooNE E. D. Zimmerman

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    from MiniBooNE * MiniBooNE * Neutrino cross-sections * Quasielastic and elastic scattering * Hadron production channels * Neutrino Oscillations * Antineutrino Oscillations...

  19. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MiniBooNE-darkmatter collaboration Original MiniBooNE collaboration From script reading a simple data base, last updated 2008. from inspirehep.net Booster Neutrino...

  20. The MicroBooNE Experiment - Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Updated collaboration list for presentations: powerpoint pdf map collaboration photo MicroBooNE organizational chart MicroBooNE contact list (password required) (IB) ...

  1. HNF-SD-WM-TI-740, Rev. OA

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    84045. HNF-SD-WM-TI-740, Rev. OA Standard Inventories of Chemicals and Radionuclides in Hanford Site Ta nk Wastes M. J. Kupfer, A. L. Boldt, B. A. Higley, K. M. Hodgson, L. W. Shelton, B. C. Simpson, and R. A. Watrous (LMHC); M. 0. LeClair (SAIC); G. 1. Borsheim (BA); R. T. Winward (MA); R. M. Orme (NHC); N. 6. Colton (PNNL); S. 1. Lambert and D. E. Place (SESC); and W. W. SchulZ (W 2 S) Lockheed Martin Hanford Corporation, Richland, WA 99352 U.S. Department of Energy Contract DE-AC06-96RL13200

  2. HNF-SD-WM-TI-740, Rev. OC

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    84047 HNF-SD-WM-TI-740, Rev. OC Standard Inventories of Chemicals and Radionuclides in Hanford Site Tank Wastes M. J. Kupfer, A. L. Boldt, K. N. Hodgson, L. W. Shelton, B. C. Simpson, and R. A. Watrous (LMHC); M. D. LeClair (SAIC); G. 1. Borsheim (BA); R. T. Winward (MA); B. A. Higley and R. M. Orme (NHC); N. G. Colton (PNNL); S. L. Lambert and D. E. Place (Cogema); and W. W. Schulz (112S) Lockheed Martin Hanford Corporation, Richland, WA 99352 U.S. Department of Energy Contract

  3. A=14Ne (1981AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1AJ01) (Not illustrated) 14Ne has not been observed. See (1976BE1V

  4. Migration of Nuclear Shell Gaps Studied in the d({sup 24}Ne,p{gamma}){sup 25}Ne Reaction

    SciTech Connect (OSTI)

    Catford, W. N.; Timis, C. N.; Baldwin, T. D.; Gelletly, W.; Pain, S. D.; Lemmon, R. C.; Pucknell, V. P. E.; Warner, D. D.; Labiche, M.; Orr, N. A.; Achouri, N. L.; Chapman, R.; Amzal, N.; Burns, M.; Liang, X.; Spohr, K.; Freer, M.; Ashwood, N. I.

    2010-05-14

    The transfer of neutrons onto {sup 24}Ne has been measured using a reaccelerated radioactive beam of {sup 24}Ne to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2{sup +} level in {sup 25}Ne and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2{sup +} level is observed simultaneously with the intruder negative parity 7/2{sup -} and 3/2{sup -} levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the transferred orbital angular momentum. The excitation energy of the 3/2{sup +} state shows that the established USD shell model breaks down well within the sd model space and requires a revised treatment of the proton-neutron monopole interaction.

  5. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Interesting Facts About the Booster Neutrino Experiment (BooNE): BooNE is the only experiment to search the entire range covered by the LSND oscillation signal. First proposed in 1997, BooNE has been collecting data since August 2002. The BooNE collaboration is small by high energy physics standards, comprising 75 physicists from 16 instiutions. If BooNE detects a supernova, it will send an automatic signal to telescopes around the world describing its position. BooNE collaboration - click to

  6. ICARUS/MicroBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ) ICARUS/MicroBooNE ν ( Φ 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 µ ν µ ν e ν e ν

  7. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    (505) 695 8364 BooNE Experiment: contact-boone@fnal.gov Current Shifter: (505) 500 5511 Detector Enclosure: (630) 840 6881 or 6081 BooNE Collaborators and Associates:...

  8. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Goals of BooNE BooNE's primary goal is to investigate the neutrino oscillation signal reported by the Los Alamos Liquid Scintillator Neutrino Detector (LSND) experiment. In 1995,...

  9. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sept. 3, 1999 - The MiniBooNE Detector: The Teletubby Design 1998: Oct. 30, 1998 - Good Physics in a Small Package June 5, 1998 - MiniBooNE Faces the PAC May 1, 1998 - The...

  10. About the MicroBooNE Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE The MicroBooNE collaboration is currently operating a large 170-ton liquid Argon Time Projection Chamber (LArTPC) that is located on the Booster neutrino beam line at...

  11. MiniBooNE Nuebar Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Event Excess in the MiniBooNE Search for bar numu rightarrow bar nue Oscillations", arXiv:1007.1150 hep-ex,Phys.Rev.Lett.105,181801 (2010) The following MiniBooNE...

  12. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    by the Los Alamos LSND experiment. MiniBooNE represents the first phase for the BooNE collaboration and consists of a 1 GeV neutrino beam and a single, 800-ton mineral oil...

  13. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Data Releases This page provides MiniBooNE data (histograms, error matrices, ntuples, etc) released in association with particular publications. Only the subset of MiniBooNE papers...

  14. A=14Ne (1986AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6AJ01) (Not illustrated) 14Ne, 14Na and 14Mg have not been observed. See (1983ANZQ

  15. A=14Ne (1991AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    91AJ01) (Not illustrated) 14Ne, 14Na and 14Mg have not been observed. See (1986AN07

  16. The MicroBooNE Experiment - Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE Collaboration Photos Click on image to view larger version April 2016 October 2014

  17. A=18Ne (1959AJ76)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    59AJ76) (Not illustrated) Theory: See (RA57). 1. 18Ne(β+)18F Qm = 4.227 The maximum energy of the positrons is 3.2 ± 0.2 MeV, the half-life is 1.6 ± 0.2 sec: log ft = 2.9 ± 0.2 (GO54D). See also (DZ56). 2. 16O(3He, n)18Ne Qm = -2.966 See (KU53A). 3. 19F(p, 2n)18Ne Qm = -15.424 See (GO54D). 4. 20Ne(p, t)18Ne Qm = -19.812 Not reported

  18. A=17Ne (1977AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7AJ02) (See the Isobar Diagram for 17Ne) GENERAL: See also (1971AJ02) and Table 17.20 [Table of Energy Levels] (in PDF or PS). Theory and reviews: (1971HA1Y, 1973HA77, 1973RE17, 1975BE31). Mass of 17Ne: The mass excess of 17Ne, determined from a measurement of the Q-value of 20Ne(3He, 6He)17Ne is 16.48 ± 0.05 MeV (1970ME11, 1972CE1A). Then 17Ne - 17F = 14.53 MeV and Eb for p, 3He and α are, respectively, 1.50, 6.46 and 9.05 MeV. See also (1971AJ02). 1. (a) 17Ne(β+)17F* → 16O + p Qm = 13.93

  19. Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    m er of 2002, the cross sections for an 8 GeV proton beam on Be were m easured by the HARP ex perim ent at CERN. Harp Setup Intro ductio n Im po rtant s te ps s ince las t re v...

  20. Team OptiMN

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    University of Minnesota Team OptiMN "OptiMN Impact Home" Project Summary Designed to fit on the majority of North Minneapolis infill lots, the OptiMN Impact Home is a collaborative project between the University of Minnesota and Urban Homeworks. The overarching goal was a flexible, high-performance, energy-efficient, and affordable house that can be easily built by Urban Homeworks and purchased by eligible low-income residents of North Minneapolis through the Green Homes North program.

  1. Elastic-plastic deformations of a beam with the SD-effect

    SciTech Connect (OSTI)

    Pavilaynen, Galina V.

    2015-03-10

    The results for the bending of a cantilever beam with the SD-effect under a concentrated load are discussed. To solve this problem, the standard Bernoulli-Euler hypotheses for beams and the Ilyushin model of perfect plasticity are used. The problem is solved analytically for structural steel A40X. The SD-effect for elastic-plastic deformations is studied. The solutions for beam made of isotropic material and material with the SD-effect are compared.

  2. MicroBooNE MicroBooNE Andrzej Szelc Yale University

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE MicroBooNE Andrzej Szelc Yale University 2 Outline ● The LArTPC. ● Physics with MicroBooNE. ● The MicroBooNE detector. 3 LArTPC Operation ● Charged particles in argon create electron-ion pairs and scintillation light. ● Electrons are drifted towards the anode wires. ● Multiple anode planes together with drift time allow 3D reconstruction. ● Collected charge allows calorimetric reconstruction. time 4 US LAr R&D Program 5 MicroBooNE Physics Goals 6 MiniBooNE

  3. MiniBooNE Pion Group

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Contents: Pion Group Home Pion Group Members Pion References Colin's Cross Section Page MiniBooNE Internal Email M. Tzanov....

  4. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scrapbook Page 2 The BooNE collaboration in winter. A tour of the construction site. Working with the BooNE Horn. BooNE in the winter A tour of the construction site. A day with the Horn Janet, Bonnie, and Jen in the Tank. Janet and Bill: the early years. Bill, Richard, Jeff, and Shawn in the midst of discussion. Preparing the tubes Janet and Bill: the early days Discussion in progress The oil tanker arrives. The final stages of oil filling. The BooNE Collaboration in the summer. The oil tanker

  5. A=19Ne (1978AJ03)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8AJ03) (See Energy Level Diagrams for 19Ne) GENERAL: See (1972AJ02) and Table 19.24 [Table of Energy Levels] (in PDF or PS). Nuclear models: (1972EN03, 1972NE1B, 1972WE01, 1973DE13, 1977BU05). Electromagnetic transitions: (1972EN03, 1972LE06, 1973HA53, 1973PE09, 1977BU05). Special states: (1972EN03, 1972GA14, 1972HI17, 1972NE1B, 1972WE01, 1977BU05, 1977SC08). Complex reactions involving 19Ne: (1976HI05, 1977BU05). Astrophsyical questions: (1973CL1E). Muon capture: (1972MI11). Pion capture and

  6. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Data Releases This page provides MiniBooNE data (histograms, error matrices, ntuples, etc) released in association with particular publications. Only the subset of MiniBooNE papers with released data are listed here. Refer to the Publications page for a complete list of MiniBooNE publications. Other MiniBooNE Data Releases: Data Released with A.A. Aguilar-Arevalo et al., "First Measurement of the Muon Antineutrino Double-Differential Charged-Current Quasielastic Cross section",

  7. Unique light-induced degradation in yellow-emitting K₂SiF₆:Mn²⁺ phosphor

    SciTech Connect (OSTI)

    Oyama, Takuya; Adachi, Sadao

    2014-10-07

    Photo-induced luminescence intensity degradation in yellow-emitting K₂SiF₆:Mn²⁺ phosphor is studied using x-ray diffraction measurement, photoluminescence (PL) analysis, PL excitation (PLE) spectroscopy, PL decay analysis, and electron spin resonance (ESR) measurement. The yellow-emitting K₂SiF₆:Mn²⁺ phosphor exhibits remarkable degradation in the PL intensity under Xe lamp exposure. Coherent laser irradiation also induces degradation and its degree is in the order of He–Cd (λ = 325 nm) > Ar⁺ (488 nm) > He–Ne laser (632.8 nm). The degradation mechanism is proposed to be due to change in the valence state of manganese ions from Mn²⁺ to Mn³⁺ by the photooxidation (Mn²⁺ → Mn³⁺) or disproportionation reaction (2Mn²⁺ → Mn⁺ + Mn³⁺). The ESR measurement confirms the decreased Mn²⁺ spin density in the sample exposed with Xe lamp. The PLE spectrum suggests that the excitation of Mn³⁺ ions occurs through energy transfer upon absorption of exciting radiation by the Mn²⁺ ions. Thermal annealing of the degraded samples at ≥200 °C causes a blueshift in the PL emission band with an appearance of the Mn⁴⁺-related sharp red emission lines.

  8. Mineralogic variation in drill holes USW NRG-6, NRG-7/7a, SD-7, SD-9, SD-12, and UZ{number_sign}14: New data from 1996--1997 analyses

    SciTech Connect (OSTI)

    Chipera, S.J.; Vaniman, D.T.; Bish, D.L.; Carey, J.W.

    1997-05-30

    New quantitative X-ray diffraction (QXRD) mineralogic data have been obtained for samples from drill holes NRG-6, NRG-7/7A, SD-7, SD-9, SD- 12, and UZ{number_sign}14. In addition, new QXRD analyses were obtained on samples located in a strategic portion of drill hole USW H-3. These data improve our understanding of the mineral stratigraphy at Yucca Mountain, and they further constrain the 3-D Mineralogic Model of Yucca Mountain. Some of the unexpected findings include the occurrence of the zeolite chabazite in the vitric zone of USW SD-7, broad overlap of vitric and zeolitic horizons (over vertical ranges up to 70 m), and the previously unrecognized importance of the bedded tuft beneath the Calico Hills Formation as a subunit with generally more extensive zeolitization than the Calico Hills Formation in the southern part of the potential repository area. Reassessment of data from drill hole USW H-5 suggests that the zeolitization of this bedded unit occurs in the northwestern part of the repository exploration block as well. Further analyses of the same interval in USW H-3, however, have not permitted the same conclusion to be reached for the southwestern part of the repository block because of the much poorer quality of the cuttings in H-3 compared with those from H-5. X-ray fluorescence (XRF) chemical data for drill holes USW SD-7, 9, and 12 show that the zeolitic horizons provide a >10 million year record of retardation of Sr transport, although the data also show that simplistic models of one-dimensional downward flow in the unsaturated zone (UZ) are inadequate. Complex interstratification of zeolites and glass, with highly variable profiles between drill cores, point to remaining problems in constructing detailed mineral stratigraphies. However, the new data in this report provide important information for constructing bounding models of zeolite stratigraphy for transport calculations.

  9. Beyond standard model searches in the MiniBooNE experiment

    SciTech Connect (OSTI)

    Katori, Teppei; Conrad, Janet M.

    2014-08-05

    The MiniBooNE experiment has contributed substantially to beyond standard model searches in the neutrino sector. The experiment was originally designed to test the Δm<mn>2mn>~>1mn>eV2 region of the sterile neutrino hypothesis by observing νe(ν-e) charged current quasielastic signals from a νμ(ν-μ) beam. MiniBooNE observed excesses of νe and ν-e candidate events in neutrino and antineutrino mode, respectively. To date, these excesses have not been explained within the neutrino standard model (νSM); the standard model extended for three massive neutrinos. Confirmation is required by future experiments such as MicroBooNE. MiniBooNE also provided an opportunity for precision studies of Lorentz violation. The results set strict limits for the first time on several parameters of the standard-model extension, the generic formalism for considering Lorentz violation. Most recently, an extension to MiniBooNE running, with a beam tuned in beam-dump mode, is being performed to search for dark sector particles. In addition, this review describes these studies, demonstrating that short baseline neutrino experiments

  10. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Experiment Details This page provides information on the MiniBooNE experiment. Images are linked in their own page with captions. Additional resources are the Talks, Slides and Posters page, Publications page, and Data Release page Beamline Flux Detector Cross sections Light Propagation (Optical Model) Calibration Particle Identification BooNE photo montage

  11. A=16Ne (1982AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    82AJ01) (See the Isobar Diagram for 16Ne) GENERAL: See also (1977AJ02) and Table 16.27 [Table of Energy Levels] (in PDF or PS). Theoretical work: (1978GU10, 1978SP1C, 1981LI1M). Reviews: (1977CE05, 1979AL1J, 1980TR1E). Mass of 16Ne: The Q-values of the 20Ne(α, 8He) and 16O(π+, π-) reactions lead to an atomic mass excess of 24.02 ± 0.04 MeV for 16Ne. 16Ne is then unbound with respect to decay into 14O + 2p by 1.43 MeV and is bound with respect to decay into 15F + p by 0.04 MeV. 1. 16O(π+,

  12. A=17Ne (1993TI07)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    93TI07) (See the Isobar Diagram for 17Ne) GENERAL: See Table Prev. Table 17.26 preview 17.26 [Table of Energy Levels] (in PDF or PS). 1. (a) 17Ne(β+)17F* → 16O + p Qm = 13.928 (b) 17Ne(β+)17F → 13N + α Qm = 8.711 (c) 17Ne(β+)17F Qm = 14.529 The half-life of 17Ne has been reported as 109.0 ± 1.0 msec (1971HA05) and 109.3 ± 0.6 msec (1988BO39): the weighted mean is 109.2 ± 0.6 and we adopt it. The decay is primarily to the proton unstable states of 17F at 4.65, 5.49, 6.04 and 8.08 MeV

  13. FY16 NE Budget Request Presentation | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    6 NE Budget Request Presentation FY16 NE Budget Request Presentation PDF icon Office of Nuclear Energy FY16 Budget Request Presentation More Documents & Publications FY17 NE Budget ...

  14. ADMINISTRATIVE CHANGE TO SD 251.1, Policy Letters: NNSA Policies, Supplemental Directives, and Business Operating

    National Nuclear Security Administration (NNSA)

    NA SD 251.1 Admin Chg 1 1 10-7-13 ADMINISTRATIVE CHANGE TO SD 251.1, Policy Letters: NNSA Policies, Supplemental Directives, and Business Operating Procedures Locations of Changes: Page Paragraph Changed To Cover Footer Office of Management and Budget Office of Business Operations 1, 2, A1-1 multiple locations the Administration NNSA 2 6.a.(1) (1) Concurred in by the NNSA Management Council Deleted 3 7.b. Once a NAP, SD, or BOP has been reviewed and comments addressed by the originating

  15. 2011 Annual Planning Summary for Nuclear Energy (NE) | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Nuclear Energy (NE) 2011 Annual Planning Summary for Nuclear Energy (NE) The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2011 and 2012 ...

  16. File:USDA-CE-Production-GIFmaps-SD.pdf | Open Energy Information

    Open Energy Info (EERE)

    SD.pdf Jump to: navigation, search File File history File usage South Dakota Ethanol Plant Locations Size of this preview: 776 600 pixels. Full resolution (1,650 1,275...

  17. Session Name: Data Transfer (session D2SD) Co-Chairs: Andrew...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Data Transfer (session D2SD) Co-Chairs: Andrew Cherry, Eli Dart 1 Contributors * Curt ... monitoring o Most sites run perfSONAR * Dedicated data paths for some programs (e.g. ...

  18. NE - Nuclear Energy - Energy Conservation Plan

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    NUCLEAR ENERGY (NE) ENERGY CONSERVATION PLAN NE has heavily emphasized the use of flexiplace, both regular and situational. Since approximately 56 percent of NE staff use flexiplace, our plan is based on the Forrestal/Germantown (FORS/GTN) office spaces, and flexiplace office space. There are other common sense actions and policies that will be used to improve energy efficiency in the offices at both FORS and GTN. In the FORS/GTN office space: 1. Use flexiplace to the maximum extent possible.

  19. MiniBooNE Flux Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The Neutrino Flux Prediction at MiniBooNE", arXiv:0806.1449 [hep-ex], Phys. Rev. D. 79, 072002 (2009) The following MiniBooNE information from the large flux paper in 2009 is made available to the public: Text files containing flux information for each neutrino species Positive horn polarity (neutrino-enhanced mode) Negative horn polarity (anti neutrino-enhanced mode) Contact Information For clarifications on how to use MiniBooNE public data or for enquiries about additional data not linked

  20. The MicroBooNE Experiment - Publications

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Documents and Publications Public Notes See the Public Notes Page for a list of notes with results made public by the MicroBooNE collaboration. Presentations See the Talks Page for copies of slides and posters presented at conferences and workshops. MicroBooNE DocDB Like most experiments at Fermilab, MicroBooNE uses DocDB - a documents database. Much of the contents of the DocDB are restricted to members of the collaboration, but some items are public. Use the link below to enter the public

  1. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Proceedings This page contains links to conference proceedings submitted by members of the MiniBooNE collaboration New Guidelines for Submitting Proceedings at MiniBooNE: As of June 2007, we have changed the rules on conference proceedings. Proceedings must be read by one other MiniBooNE person (besides the author) of postdoc level or above before being submitted. Proceedings should also be sent to boone-talks@fnal.gov for archiving on this website. back to Talks page Speaker Proceedings Info

  2. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    (numbers, plots, details) of the MiniBooNE experiment and analysis pieces. Images are linked in their own page with captions. Additional resources are the Talks, Slides and...

  3. MiniBooNE Flux Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    on how to use MiniBooNE public data or for enquiries about additional data not linked from this page, please contact: Steve Brice or Richard Van de Water Acknowledgments If...

  4. The NeXus data format

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Könnecke, Mark; Akeroyd, Frederick A.; Bernstein, Herbert J.; Brewster, Aaron S.; Campbell, Stuart I.; Clausen, Björn; Cottrell, Stephen; Hoffmann, Jens Uwe; Jemian, Pete R.; Männicke, David; et al

    2015-01-30

    NeXus is an effort by an international group of scientists to define a common data exchange and archival format for neutron, X-ray and muon experiments. NeXus is built on top of the scientific data format HDF5 and adds domain-specific rules for organizing data within HDF5 files, in addition to a dictionary of well defined domain-specific field names. The NeXus data format has two purposes. First, it defines a format that can serve as a container for all relevant data associated with a beamline. This is a very important use case. Second, it defines standards in the form of application definitionsmore » for the exchange of data between applications. NeXus provides structures for raw experimental data as well as for processed data.« less

  5. MiniBooNE Cross Sections

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SSECTIONS(AT)fnal.gov convenors: Alessandro Curioni (alessandro.curioni(AT)yale.edu) and Sam Zeller (gzeller(AT)fnal.gov) Cross Sections at MiniBooNE, Meetings, Reference Articles,...

  6. The NeXus data format

    SciTech Connect (OSTI)

    Könnecke, Mark; Akeroyd, Frederick A.; Bernstein, Herbert J.; Brewster, Aaron S.; Campbell, Stuart I.; Clausen, Björn; Cottrell, Stephen; Hoffmann, Jens Uwe; Jemian, Pete R.; Männicke, David; Osborn, Raymond; Peterson, Peter F.; Richter, Tobias; Suzuki, Jiro; Watts, Benjamin; Wintersberger, Eugen; Wuttke, Joachim

    2015-01-30

    NeXus is an effort by an international group of scientists to define a common data exchange and archival format for neutron, X-ray and muon experiments. NeXus is built on top of the scientific data format HDF5 and adds domain-specific rules for organizing data within HDF5 files, in addition to a dictionary of well defined domain-specific field names. The NeXus data format has two purposes. First, it defines a format that can serve as a container for all relevant data associated with a beamline. This is a very important use case. Second, it defines standards in the form of application definitions for the exchange of data between applications. NeXus provides structures for raw experimental data as well as for processed data.

  7. A=16Ne (1986AJ04)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6AJ04) (See the Isobar Diagram for 16Ne) GENERAL: See also (1982AJ01) and Table 16.26 [Table of Energy Levels] (in PDF or PS) here. See (1981SE1B, 1983ANZQ, 1985AN28, 1985MA1X). Mass of 16Ne: The Q-values of the 20Ne(α, 8He) and 16O(π+, π-) reactions lead to atomic mass excesses of 23.93 ± 0.08 MeV (1978KE06), 23.978 ± 0.024 MeV (1983WO01) and 24.048 ± 0.045 MeV (1980BU15) [recalculated using the (1985WA02) masses for 8He, 16O and 20Ne]. The weighted mean is 23.989 ± 0.020 MeV which is

  8. A=16Ne (1993TI07)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    93TI07) (See the Isobar Diagram for 16Ne) GENERAL: See Table Prev. Table 16.29 preview 16.29 [General Table] (in PDF or PS) and Table Prev. Table 16.32 preview 16.32 [Table of Energy Levels] (in PDF or PS). Mass of 16Ne: The Q-values of the 20Ne(α, 8He) and 16O(π+, π-) reactions lead to atomic mass excesses of 23.93 ± 0.08 MeV (1978KE06), 23.978 ± 0.024 MeV (1983WO01) and 24.048 ± 0.045 MeV (1980BU15) [recalculated using the (1985WA02) masses for 8He, 16O and 20Ne]. The weighted mean is

  9. A=17Ne (1982AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    82AJ01) (See the Isobar Diagram for 17Ne) GENERAL: See (1977AJ02) and Table 17.22 [Table of Energy Levels] (in PDF or PS). Theory and reviews:(1975BE56, 1977CE05, 1978GU10, 1978WO1E, 1979BE1H). Other topics:(1981GR08). Mass of 17Ne: The mass excess adopted by (1977WA08) is 16.478 ± 0.026 MeV, based on unpublished data. We retain the mass excess 16.48 ± 0.05 MeV based on the evidence reviewed in (1977AJ02). 1. (a) 17Ne(β+)17F* → 16O + p Qm = 13.93 (b) 17Ne(β+)17F Qm = 14.53 The half-life of

  10. A=17Ne (1986AJ04)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6AJ04) (See the Isobar Diagram for 17Ne) GENERAL: See (1982AJ01) and Table 17.20 [Table of Energy Levels] (in PDF or PS). Theory and reviews: (1983ANZQ, 1983AU1B, 1985AN28). 1. (a) 17Ne(β+)17F* → 16O + p Qm = 13.93 (b) 17Ne(β+)17F Qm = 14.53 The half-life of 17Ne is 109.0 ± 1.0 msec (1971HA05). Earlier values (see (1971AJ02)) gave a mean value of 108.0 ± 2.7 msec. The decay is primarily to the proton unstable states of 17F at 4.70, 5.52 and 6.04 MeV with Jπ = 3/2-, 3/2- and 1/2-: see

  11. UCB-NE-107 user's manual

    SciTech Connect (OSTI)

    Lee, W.W.L.

    1989-03-01

    The purpose of this manual is to provide users of UCB-NE-107 with the information necessary to use UCB-NE-107 effectively. UCB-NE-107 is a computer code for calculating the fractional rate of readily soluble radionuclides that are released from nuclear waste emplaced in water-saturated porous media. Waste placed in such environments will gradually dissolve. For many species such as actinides and rare earths, the process of dissolution is governed by the exterior flow field, and the chemical reaction rate or leaching rate. However, for readily soluble species such as /sup 135/Cs, /sup 137/Cs, and /sup 129/I, it has been observed that their dissolution rates are rapid. UCB-NE-107 is a code for calculating the release rate at the waste/rock interface, to check compliance with the US Nuclear Regulatory Commission's (USNRC) subsystem performance objective. It is an implementation of the analytic solution given below. 5 refs., 2 figs.

  12. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Posters What's a Neutrino? How neutrinos fit into our understanding of the universe. Recipe for a Neutrino Beam Start with some protons... concocting the MiniBooNE beam. The...

  13. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    BooNE will investigate the question of neutrino mass by searching for oscillations of muon neutrinos into electron neutrinos. This will be done by directing a muon neutrino beam...

  14. The MicroBooNE Experiment - Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Contact MicroBooNE Spokespeople: Bonnie Fleming, Yale email: bonnie.fleming(AT)yale.edu phone: (203) 432-3235 Sam Zeller, FNAL email: gzeller(AT)fnal.gov phone: (630) 840-6879 Collaboration Members

  15. A=20Ne (72AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ) elastic scattering. It is interpreted in terms of a quasi-molecular -particle cluster model (CO69S). See also (WA65M). 18. 17O(, n)20Ne Qm 0.588 Angular...

  16. A=18Ne (1995TI07)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    95TI07) (See Energy Level Diagrams for 18Ne) GENERAL: See Table Prev. Table 18.35 preview 18.35 [General Table] (in PDF or PS) and Table Prev. Table 18.36 preview 18.36 [Table of Energy Levels] (in PDF or PS). For B(E2) of 18Ne*(1.89) and other parameters see (1987RA01) and Table Prev. Table 2 preview 2 in the Introduction. 1. 18Ne(β+)18F Qm = 4.446 The half-life of 18Ne is 1672 ± 8 ms: see (1978AJ03) and (1983AD03). The decay is primarily to 18F*(0, 1.04, 1.70 MeV). In addition there is an

  17. A=20Ne (59AJ76)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    59AJ76) (See Energy Level Diagram for 20Ne) GENERAL: See also Table 20.6 [Table of Energy Levels] (in PDF or PS). Theory: See (GA55B, HE55F, MO56, BA57, RA57). 1. 9Be(14N, t)20Ne Qm = 6.323 See (GO58E). 2. 16O(α, γ)20Ne Qm = 4.753 An unsuccessful attempt has been made to observe the isobaric spin-forbidden transition between the T = 0 states at 7.19 MeV (J = 3-) and 1.63 MeV (J = 2+). The radiative width is < 6 x 10-3 eV, indicating an admixture of T = 1 of < 1.3 x 10-3 in 20Ne*(7.19)

  18. MiniBooNE Nue Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Neutrino Appearance at the m2 1 eV2 Scale", arXiv:0704.1500 hep-ex, Phys. Rev. Lett. 98, 231801 (2007) The following MiniBooNE information from the first oscillation paper in...

  19. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    elastic cross-section paper is on the archive (arXiv:1309.7257) and has been published in Phys. Rev. D91, 012004 (2015). MiniBooNE's antineutrino charged current quasi-elastic...

  20. MiniBooNE Nuebar Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Electron Anti-Neutrino Appearance at the m2 1 eV2 Scale", arXiv:0904.1958 hep-ex, Phys. Rev. Lett. 103, 111801 (2009) The following MiniBooNE information from the 2009...

  1. MicroBooNE Detector Move

    ScienceCinema (OSTI)

    Flemming, Bonnie; Rameika, Gina

    2014-07-15

    On Monday, June 23, 2014 the MicroBooNE detector -- a 30-ton vessel that will be used to study ghostly particles called neutrinos -- was transported three miles across the Fermilab site and gently lowered into the laboratory's Liquid-Argon Test Facility. This video documents that move, some taken with time-lapse camerad, and shows the process of getting the MicroBooNE detector to its new home.

  2. {beta} decay of {sup 26}Ne

    SciTech Connect (OSTI)

    Weissman, L.; Lisetskiy, A.F.; Arndt, O.; Dillmann, I.; Hallmann, O.; Kratz, K.L.; Pfeiffer, B.; Bergmann, U.; Cederkall, J.; Fraile, L.; Koester, U.; Franchoo, S.; Gaudefroy, L.; Sorlin, O.; Tabor, S.

    2004-11-01

    A pure neutron-rich {sup 26}Ne beam was obtained at the ISOLDE facility using isobaric selectivity. This was achieved by a combination of a plasma ion source with a cooled transfer line and subsequent mass separation. The high quality of the beam and good statistics allowed us to obtain new experimental information on the {sup 26}Ne {beta}-decay properties and resolve a contradiction between earlier experimental data and prediction of shell-model calculations.

  3. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Articles FermiNews Fermilab's biweekly magazine (several stories) Beam Line: Special Neutrino Issue A special issue of SLAC's quarterly magazine. Earth & Sky "Catching Ghost Particles": Interview with Janet Conrad Columbia Magazine "The Nature of the Neutrino": MiniBooNE and neutrinos The Los Angeles Times "It's No Small Matter": K. C. Cole's article detailing her summer 2003 stint at Fermilab working on MiniBooNE [text only]

  4. NE Press Releases | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Press Releases NE Press Releases RSS July 6, 2016 Energy Department To Fund Radiochemistry Traineeship Program The Energy Department's offices of Nuclear Energy (NE) and Environmental Management (EM) are co-funding a new traineeship program in radiochemistry at Washington State University (WSU) in Pullman. June 14, 2016 Energy Department Invests $82 Million to Advanced Nuclear Technology In total, 93 projects were selected to receive funding that will help push innovative nuclear technologies

  5. MicroBooNE Detector Stability MICROBOONE-NOTE-1013-PUB The MicroBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE Detector Stability MICROBOONE-NOTE-1013-PUB The MicroBooNE Collaboration June 30, 2016 Abstract The Micro Booster Neutrino Experiment (MicroBooNE) is designed to explore the low- energy excess in the ν e event spectrum reported by the MiniBooNE experiment [1] and to measure ν-Ar cross sections in the 1 GeV energy range. The detector is a liquid argon time projection chamber with wire readout, supplemented with a light detection system based on photo-multiplier tubes (PMTs). The

  6. FY17 NE Budget Request Presentation | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    FY17 NE Budget Request Presentation FY17 NE Budget Request Presentation FY17 NE Budget Request Presentation (2.07 MB) More Documents & Publications FY16 NE Budget Request Presentation Office of Nuclear Energy Fiscal Year 2014 Budget Request Assessment of Small Modular Reactor Suitability for Use On or Near Air Force Space Command Installations SAND 2016-2600

  7. MiniBooNE at All Experimenter's Meeting

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    100807 MiniBooNE Status Report R.G. Van de Water 100107 MiniBooNE Status Report R.G. Van de Water 080607 MiniBooNE Status Report Steve Brice 073007 MiniBooNE Status...

  8. MN Office of Energy Security | Open Energy Information

    Open Energy Info (EERE)

    MN Office of Energy Security Jump to: navigation, search Name: MN Office of Energy Security Place: St. Paul, MN Website: www.mnofficeofenergysecurity.c References: MN Office of...

  9. Cross section analyses in MiniBooNE and SciBooNE experiments

    SciTech Connect (OSTI)

    Katori, Teppei

    2015-05-15

    The MiniBooNE experiment (2002-2012) and the SciBooNE experiment (2007-2008) are modern high statistics neutrino experiments, and they developed many new ideas in neutrino cross section analyses. In this note, I discuss selected topics of these analyses.

  10. A=19Ne (1995TI07)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    95TI07) (See Energy Level Diagrams for 19Ne) GENERAL: See Table Prev. Table 19.26 preview 19.26 [General Table] (in PDF or PS) and Table Prev. Table 19.27 preview 19.27 [Table of Energy Levels] (in PDF or PS) here. μg.s. = -1.88542 (8) nm (1982MA39) μ0.239 = -0.740 (8) nm (1978LEZA) 1. 19Ne(β+)19F Qm = 3.238 We adopt the half-life of 19Ne suggested by (1983AD03): 17.34 ± 0.09 s. See also (1978AJ03). The decay is principally to 19Fg.s.: see Table Prev. Table 19.29 preview 19.29 (in PDF or

  11. Canister storage building compliance assessment SNF project NRC equivalency criteria - HNF-SD-SNF-DB-003

    SciTech Connect (OSTI)

    BLACK, D.M.

    1999-08-11

    This document presents the Project's position on compliance with the SNF Project NRC Equivalency Criteria--HNF-SD-SNF-DE-003, Spent Nuclear Fuel Project Path Forward Additional NRC Requirements. No non-compliances are shown The compliance statements have been reviewed and approved by DOE. Open items are scheduled to be closed prior to project completion.

  12. MiniBooNE Nue Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Neutrino Appearance at the Δm2 ~1 eV2 Scale", arXiv:0704.1500 [hep-ex], Phys. Rev. Lett. 98, 231801 (2007) The following MiniBooNE information from the first oscillation paper in 2007 is made available to the public: Energy Range for Default Oscillation Fit (475 MeV - 3000 MeV reconstructed neutrino energy) ntuple file of official MiniBooNE sin2(2theta) sensitivity and upper limit curves as a function of Dm2, for a 2-neutrino muon-to-electron oscillation fit, and 90% and 3sigma confidence

  13. MiniBooNE Nuebar Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Search for Electron Anti-Neutrino Appearance at the Δm2 ~1 eV2 Scale", arXiv:0904.1958 [hep-ex], Phys. Rev. Lett. 103, 111801 (2009) The following MiniBooNE information from the 2009 nuebar appearance paper is made available to the public: Energy Range: 475 MeV - 3000 MeV reconstructed neutrino energy ntuple file of MiniBooNE sin2(2theta) sensitivity and upper limit curves as a function of Dm2, for a 2-neutrino muon-to-electron antineutrino oscillation fit, and 90% and 3sigma confidence

  14. MiniBooNE Oscillation Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Oscillation Results and Implications Michael H. Shaevitz for the MiniBooNE Collaboration Abstract. The MiniBooNE Collaboration has reported ...rst results of a search for e appearance in a beam. With two largely independent analyses, no signi...cant excess was observed of events above background for reconstructed neutrino energies above 475 MeV and the data are consistent with no oscillations within a two neutrino appearance-only oscillation model. An excess of events (186 27 33 events) is

  15. MiniBooNE Steve Brice Fermilab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    17 May 2006 1 MiniBooNE Steve Brice Fermilab * Oscillation Analysis * Issues of the Past Year - Normalization - Optical Model -  0 MisIDs * Summary * Future DOE Review 17 May 2006 2 MiniBooNE Goal * Search for  e appearance in a   beam at the ~0.3% level - L=540 m ~10x LSND - E~500 MeV ~10x LSND DOE Review 17 May 2006 3 Particle ID * Identify electrons (and thus candidate  e events) from characteristic hit topology * Non-neutrino background easily removed     n p W

  16. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cross Sections MiniBooNE's neutrino flux (with a mean energy of ~700 MeV) dictates the type of neutrino interactions the experiment sees. At these energies, quasi-elastic (QE) and single pion production processes dominate. For MiniBooNE, the contributions from multi-pion production and deep inelastic scattering (DIS) are small. image: neutrino cross sections vs energy There are several cross sections which contribute at these energies. Here is a plot of the charged current (CC) cross section

  17. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Detector The MiniBooNE tank is 12 m diameter sphere, filled with approximately 800 tons of mineral oil, CH2, which has a density of 0.845 ± 0.001 g/cm3. 1280 PMTs provide about 10% coverage of the inner tank region, and 240 PMTs cover the outer, optically isolated "veto" region in the last 1.3 m in the tank. Most of the tubes were recovered from LSND, and are 'old' tubes, some additional ones were bought for MiniBooNE, and are 'new'; differences in the new vs the old tube function are

  18. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Flux The MiniBooNE neutrino flux calculations are described in detail in PRD 79, 072002 (2009) and arXiv:0806.1449 General neutrino fluxes vs true neutrino energy, for MiniBooNE: image:muon neutrino flux image:electron neutrino flux image:final muon and electron neutrino fluxes π+ production Data sets: M.G. Catanesi et al. [HARP Collaboration], ``Measurement of the production cross-section of positive pions in the collision of 8.9-GeV/c protons on beryllium,'', arXiv:hep-ex/0702024 E910

  19. MicroBooNE First Cosmic Tracks

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    First Tracks in MicroBooNE (August 6, 2015) On August 6, 2015, we started to turn on the drift high voltage in the MicroBooNE detector for the very first time. We paused at 58 kV (this is about 1/2 of our design voltage) and immediately started to see tracks across the entire TPC. Below are some of our first images of cosmic rays and UV laser tracks (last picture) recorded by the TPC! Collection plane images: And here is one of the first images of a UV laser track in the TPC. You can tell which

  20. A=18Ne (1983AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    83AJ01) (See Energy Level Diagrams for 18Ne) GENERAL: See also (1978AJ03) and Table 18.21 [Table of Energy Levels] (in PDF or PS). Model calculations: (1979DA15, 1979SA31, 1980ZH01). Electromagnetic transitions: (1977HA1Z, 1979SA31, 1982LA26). Special states: (1977HE18, 1978KR1G, 1979DA15, 1979SA31, 1980OK01, 1982ZH1D). Astrophysical questions: (1978WO1E). Complex reactions involving 18Ne: (1979HE1D). Pion-induced capture and reactions (See also reaction 6.): (1977PE12, 1977SP1B, 1978BU09,

  1. A=18Ne (1987AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7AJ02) (See Energy Level Diagrams for 18Ne) GENERAL: See (1983AJ01) and Table 18.22 [Table of Energy Levels] (in PDF or PS). Model calculations:(1982ZH01, 1983BR29, 1984SA37, 1985RO1G). Special states:(1982ZH01, 1983BI1C, 1983BR29, 1984SA37, 1985RO1G, 1986AN10, 1986AN07). Electromagnetic transitions:(1982BR24, 1982RI04, 1983BR29, 1985AL21, 1986AN10). Astrophysical questions:(1982WI1B, 1987WI11). Complex reactions involving 18Ne:(1986HA1B). Pion capture and reactions (See also reaction

  2. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Milestones 2008: January 1 1E21 protons on target recorded by MiniBooNE 2007: April 10 25m absorber repaired 2006: August 23 9e16 protons delivered in a single hour (Booster champagne goal) January 18 first antineutrino beam 2004: April 26 Record week (04/19-04/26) 6.83E18 protons delivered. 2003: March 28 Record day: 9.6E17 protons delivered March 18 Record day: 8.18E17 protons delivered March 06 5.5E17 protons delivered to MiniBooNE in 1 hour. (passed the official BD 5E16 milestone) March 01

  3. Category:Minneapolis, MN | Open Energy Information

    Open Energy Info (EERE)

    16 total. SVFullServiceRestaurant Minneapolis MN Northern States Power Co (Minnesota) Excel Energy.png SVFullServiceRestauran... 89 KB SVHospital Minneapolis MN Northern States...

  4. Elasticity and magnetocaloric effect in MnFe4Si3

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Herlitschke, Marcus; Klobes, B.; Sergueev, I.; Hering, Paul; Persson, Joerg; Hermann, Raphael P.

    2016-03-16

    The room temperature magnetocaloric material MnFe4Si3 was investigated with nuclear inelastic scattering (NIS) and resonant ultrasound spectroscopy (RUS) at different temperatures and applied magnetic fields in order to assess the infuence of the magnetic transition and the magnetocaloric effect on the lattice dynamics. The NIS data give access to phonons with energies above 3 meV, whereas RUS probes the elasticity of the material in the MHz frequency range and thus low energy, ~5 neV, phonon modes. A significant infuence of the magnetic transition on the lattice dynamics is observed only in the low energy region. Here, MnFe4Si3 and other compoundsmore » in the Mn5-xFexSi3 series were also investigated with vibrating sample magnetometry, resistivity measurements and Moessbauer spectroscopy in order to study the magnetic transitions and to complement the obtained results on the lattice dynamics.« less

  5. MiniBooNE darkmatter collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MiniBooNE-DM Collaboration A.A. Aguilar-Arevalo,1 B. Batell,2 B.C. Brown,3 R. Carr,4 R. Cooper,5 P. deNiverville,6 R. Dharmapalan,7 R. Ford,3 F.G. Garcia,3 G. T. Garvey,8 J....

  6. UCB-NE-108 user's manual

    SciTech Connect (OSTI)

    Kang, C.H.; Lee, W.W.L.

    1989-04-01

    The purpose of this manual is to provide users of UCB-NE-108 with the information necessary to use UCB-NE-108 effectively. UCB-NE-108 is a computer code for calculating the fractional release rate of readily soluble radionuclides that are released from nuclear waste emplaced in water-saturated porous media, and transported through layers of porous media. Waste placed in such environments will gradually dissolve. For many species such as actinides and rare earths, the process of dissolution is governed by the exterior flow field, and the chemical reaction rate or leaching rate. In a spent-fuel waste package the soluble cesium and iodine accumulated in fuel-cladding gaps, voids, and grain boundaries of spent fuel rods are expected to dissolve rapidly when groundwater penetrates the fuel cladding. UCB-NE-108 is a code for calculating the release rate at the interface of two layers of porous material, such as the backfill around a high-level waste package and natural rock, to check compliance with the US Nuclear Regulatory Commission's (USNRC) subsystem performance objective. It is an implementation of the analytic solution given below. 6 refs., 2 figs.

  7. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Civil Construction Pictures The civil construction required for the MiniBooNE experiment consists of two independent construction projects. The Detector Construction: This project was started on October 15, 1999. The 8-GeV Beamline and Target Hall: This project started on June 7, 2000.

  8. A=17Ne (71AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Diagram for 17Ne) GENERAL: See also Table 17.22 Table of Energy Levels (in PDF or PS). Theory: (WI64E, MA65J, MA66BB). Reviews: (BA60Q, GO60P, BA61F, GO62N, GO64J, GO66J, GO66L,...

  9. A=16Ne (71AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    predicts M - A 25.15 0.6 MeV (CE68A: 16Ne is then unbound with respect to breakup into 14O + 2p by 2.6 MeV. See also (GO60K, GO60P, BA61F, GO61N, GO62N, GO62O, GA64A,...

  10. A=16Ne (1977AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    predicts M - A 25.15 0.6 MeV (1968CE1A); 16Ne is then unbound with respect to breakup into 14O + 2p by 2.6 MeV: see (1971AJ02) for the earlier work. See also (1972WA07)...

  11. MiniBooNE Results / MicroBooNE Status! Eric Church, Yale University

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    trigger ReconstructionpID: LArSoft LAr fill w.o. evacuation Surface Running UV Laser Calibration System Spring-Summer, 2014 16 February 22, 2014 MicroBooNE ...

  12. MiniBooNE Numu/Numubar Disappearance Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for muon neutrino and antineutrino disappearance in MiniBooNE", arXiv:0903.2465 hep-ex, Phys. Rev. Lett. 103, 061802 (2009) The following MiniBooNE information from the 2009 numu...

  13. Joint MiniBooNE, SciBooNE Disappearance Analysis Gary Cheng Warren Huelsnitz

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MiniBooNE, SciBooNE Disappearance Analysis Gary Cheng Warren Huelsnitz Columbia University Los Alamos National Lab Fermilab 31 Aug 2012 Friday, August 31, 2012 Acknowledgements * Teppei Katori * Joe Grange * Zarko Pavlovic * Kendall Mahn and Yasuhiro Nakajima 2 * Muon Neutrino CCQE Cross Section Analysis (Phys. Rev. D81, 092005 (2010)) * Neutrino Contamination in Antineutrino Mode (Phys. Rev. D84, 072005 (2011) and arXiv: 1107.5327) * Electron Neutrino (Antineutrino) Appearance (Phys. Rev. Lett.

  14. ADMINISTRATIVE CHANGE TO NNSA SD G-1027, "GUIDANCE ON USING RELEASE FRACTION AND MODERN

    National Nuclear Security Administration (NNSA)

    G 1027 Admin Change 1 1 5-13-14 ADMINISTRATIVE CHANGE TO NNSA SD G-1027, "GUIDANCE ON USING RELEASE FRACTION AND MODERN DOSIMETRIC INFORMATION CONSISTENTLY WITH DOE STD 1027-92, HAZARD CATEGORIZATION AND ACCIDENT ANALYSIS TECHNIQUES FOR COMPLIANCE WITH DOE ORDER 5480.23, NUCLEAR SAFETY ANALYSIS REPORTS, CHANGE NOTICE NO. 1" Locations of Changes: Page Paragraph Changed To 2 / 3 Added Revision History Table 3 2 CANCELLATION. None. When implemented for a nuclear facility, the methodology

  15. Inversion for Eigenvalues and Modes Using Sierra-SD and ROL.

    SciTech Connect (OSTI)

    Walsh, Timothy; Aquino, Wilkins; Ridzal, Denis; Kouri, Drew Philip

    2015-12-01

    In this report we formulate eigenvalue-based methods for model calibration using a PDE-constrained optimization framework. We derive the abstract optimization operators from first principles and implement these methods using Sierra-SD and the Rapid Optimization Library (ROL). To demon- strate this approach, we use experimental measurements and an inverse solution to compute the joint and elastic foam properties of a low-fidelity unit (LFU) model.

  16. Geology of the USW SD-12 drill hole Yucca Mountain, Nevada

    SciTech Connect (OSTI)

    Rautman, C.A.; Engstrom, D.A.

    1996-11-01

    Drill hole USW SD-12 is one of several holes drilled under Site Characterization Plan Study 8.3.1.4.3.1, also known as the {open_quotes}Systematic Drilling Program,{close_quotes} as part of the U.S. Department of Energy characterization program at Yucca Mountain, Nevada, which has been proposed as the potential location of a repository for high-level nuclear waste. The SD-12 drill hole is located in the central part of the potential repository area, immediately to the west of the Main Test Level drift of the Exploratory Studies Facility and slightly south of midway between the North Ramp and planned South Ramp declines. Drill hole USW SD-12 is 2166.3 ft (660.26 m) deep, and the core recovered essentially complete sections of ash-flow tuffs belonging to the lower half of the Tiva Canyon Tuff, the Pah Canyon Tuff, and the Topopah Spring Tuff, all of which are part of the Miocene Paintbrush Group. A virtually complete section of the Calico Hills Formation was also recovered, as was core from the entire Prow Pass Tuff formation of the Crater Flat Group.

  17. Geology of the USW SD-7 drill hole Yucca Mountain, Nevada

    SciTech Connect (OSTI)

    Rautman, C.A.; Engstrom, D.A.

    1996-09-01

    The USW SD-7 drill hole is one of several holes drilled under Site Characterization Plan Study 8.3.1.4.3.1, also known as the Systematic Drilling Program, as part of the U.S. Department of Energy characterization program at Yucca Mountain, Nevada. The Yucca Mountain site has been proposed as the potential location of a repository for high-level nuclear waste. The SD-7 drill hole is located near the southern end of the potential repository area and immediately to the west of the Main Test Level drift of the Exploratory Studies Facility. The hole is not far from the junction of the Main Test Level drift and the proposed South Ramp decline. Drill hole USW SD-7 is 2675.1 ft (815.3 m) deep, and the core recovered nearly complete sections of ash-flow tuffs belonging to the lower half of the Tiva Canyon Tuff, the Pah Canyon Tuff, and the Topopah Spring Tuff, all of which are part of the Miocene Paintbrush Group. Core was recovered from much of the underlying Calico Hills Formation, and core was virtually continuous in the Prow Pass Tuff and the Bullfrog Tuff. The SD-7 drill hole penetrated the top several tens of feet into the Tram Tuff, which underlies the Prow Pass and Bullfrog Tuffs. These latter three units are all formations of the Crater Flat Group, The drill hole was collared in welded materials assigned to the crystal-poor middle nonlithophysal zone of the Tiva Canyon Tuff; approximately 280 ft (85 m) of this ash-flow sheet was penetrated by the hole. The Yucca Mountain Tuff appears to be missing from the section at the USW SD-7 location, and the Pah Canyon Tuff is only 14.5 ft thick. The Pah Canyon Tuff was not recovered in core because of drilling difficulties, suggesting that the unit is entirely nonwelded. The presence of this unit is inferred through interpretation of down-hole geophysical logs.

  18. A=18Ne (1972AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2AJ02) (See Energy Level Diagrams for 18Ne) GENERAL: See Table 18.23 [Table of Energy Levels] (in PDF or PS). Shell and cluster model calculations: (1957WI1E, 1969BE1T, 1970BA2E, 1970EL08, 1970HA49, 1972KA01). Electromagnetic transitions: (1970EL08, 1970HA49). Special levels: (1966MI1G, 1969KA29, 1972KA01). Pion reactions: (1965PA1F). Other theoretical calculations: (1965GO1F, 1966KE16, 1968BA2H, 1968BE1V, 1968MU1B, 1968NE1C, 1968VA1J, 1968VA24, 1969BA1Z, 1969GA1G, 1969KA29, 1969MU09, 1969RA28,

  19. A=19Ne (1983AJ01)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    83AJ01) (See Energy Level Diagrams for 19Ne) GENERAL: See (1978AJ03) and Table 19.23 [Table of Energy Levels] (in PDF or PS). Nuclear models: (1978MA2H, 1978PE09, 1978PI06, 1979DA15, 1979MA27, 1979PE16, 1982KI02). Electromagnetic transitions: (1978PE09, 1978SC19, 1979MA27, 1979PE16). Special states: (1978MA2H, 1978PE09, 1978PI06, 1978SC19, 1979DA15, 1980OK01, 1982KI02). Astrophysical questions: (1977SI1D, 1978WO1E, 1979RA1C). Applied topics: (1979AL1Q). Complex reactions involving 19Ne:

  20. A=19Ne (1987AJ02)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7AJ02) (See Energy Level Diagrams for 19Ne) GENERAL: See (1983AJ01) and Table 19.21 [Table of Energy Levels] (in PDF or PS). Nuclear models:(1983BR29, 1983PO02). Special states: (1983BI1C, 1983BR29, 1983PO02, 1986AN07). Electromagnetic transitions: (1982BR24, 1983BR29, 1985AL21). Astrophysical questions: (1981WA1Q, 1982WI1B, 1986LA07). Applications:(1982BO1N). Complex reactions involving 19Ne:(1981DE1P, 1983JA05, 1984GR08, 1985BE40, 1986GR1A, 1986HA1B, 1987RI03). Pion capture and reactions (See

  1. Djurcic_MiniBooNE_NuFact2010

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MiniBooNE Results Zelimir Djurcic Zelimir Djurcic Argonne National Laboratory Argonne National Laboratory NuFact2010: 12th International Workshop on Neutrino Factories, NuFact2010: 12th International Workshop on Neutrino Factories, Superbeams Superbeams and and Beta Beams Beta Beams October 20-25, 2010. Mumbai, India October 20-25, 2010. Mumbai, India Outline Outline * * MiniBooNE MiniBooNE Experiment Description Experiment Description * * MiniBooNE MiniBooNE ' ' s s Neutrino Results Neutrino

  2. M r. Andrew Wallo, III, NE-23

    Office of Legacy Management (LM)

    300.955 L*Enfom Plaza, S. Iv.. Washrhington. D.C. 200242174, Tekphonc (202) 7117-03.87.cdy.43 23 September 1987 M r. Andrew Wallo, III, NE-23 Division of Facility & Site Deconnnissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear M r. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND UNIVERSITIES The attached elimination recommendation was prepared in accordi with your suggestion during our meeting on 22 September. The reconu includes 26 colleges and universities

  3. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Light propagation in mineral oil Though the dominant light observed in MiniBooNE is Cherenkov light, scintillation and fluorescence (here, reabsorbed Cherenkov light re-emitted) account for about 25% of the light. We model: scintillation light (yield, decay times, spectrum), fluorescence, scattering (Rayleigh, Raman), absorption, reflection (off tank walls, PMT faces) and PMT effects (single pe charge response). External measurements Scintillation from p beam (IUCF) Scintillation from cosmic mu

  4. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Particle Identification (PID) We use hit topology and timing to identify events. Particles produce Cherenkov light in our tank, as well as some scintillation light, dependent on particle type. Two independent methods to identify electron neutrinos in MiniBooNE: Boosted Decision Trees, and Track Based. The two methods use different event reconstruction fitters. Boosted Decision Trees (BDT) Decision trees are similar to neural nets, but don't suffer from the same pathologies. To form a decision

  5. MicroBooNE Proposal Addendum March

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE Proposal Addendum March 3, 2008 H. Chen, G. de Geronimo, J. Farrell, A. Kandasamy, F. Lanni, D. Lissauer, D. Makowiecki, J. Mead, V. Radeka, S. Rescia, J. Sondericker, B. Yu Brookhaven National Laboratory, Upton, NY L. Bugel, J. M. Conrad, Z. Djurcic, V. Nguyen, M. Shaevitz, W. Willis ‡ Columbia University, New York, NY C. James, S. Pordes, G. Rameika Fermi National Accelerator Laboratory, Batavia, IL C. Bromberg, D. Edmunds Michigan State University, Lansing, MI P. Nienaber St.

  6. NA-SD 243.1B NNSA Records Management Suplemental Directive

    National Nuclear Security Administration (NNSA)

    243.1 Admin Change 1 1 3-21-16 ADMINISTRATIVE CHANGE TO NA SD 243.1, Records Management Program Locations of Changes: Page Paragraph From To Throughout Document * NNSA Records Management (Update name and hyperlink to new SharePoint site.) * NNSA Records Program Office (Update name and hyperlink to new SharePoint site.) 2 5.a.(1) * Office of the Administrator (NA-1) * Office of Defense Programs (NA- 10) * Office of Defense Nuclear Nonproliferation (NA-20) * Office of Naval Reactors (NA-30) *

  7. Mr. Andrew Wallo, III, NE-23

    Office of Legacy Management (LM)

    300, 955 L'E~~MI Phm.SW.:. Washin@on. LX. 200242174, T~kphonc(202)48ll. 5 7117-03.87.cdy.43 23 September 1987 cA Mr. Andrew Wallo, III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear Mr. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND UNIVERSITIES M/).0-05 pl 0.0% The attached elimination recommendation was prepared in accordance ML.05 with your suggestion during our meeting on 22 September. The recommendation flD.o-02

  8. Mr. Andrew Wallo, III, NE-23

    Office of Legacy Management (LM)

    9% L'Enfam Plaza, S, W.. Warhin@on, D.C. 2002ijl74j Tekphow (202) 488ddO 7117-03.87.cdy.'i3 23 September 1967 ~ s ~ Mr. Andrew Wallo, III, NE-23 Oivision of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear Mr. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND IJNIVFRSITIES , The attached elimination reconnnendation was prepar!ad in accordance with your suggestion during our meeting on 22 September! The recommendation includes 26 colleges and

  9. Mr. Andrew Wallo, III, NE-23

    Office of Legacy Management (LM)

    suite 7900,955 L%l/onr Plaza, S. W., Washingion, D.C. 20024.?174,, Telephone: (202) 488.~ Mr. Andrew Wallo, III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 7117~03.87.dy.43 23 September 1987 I j / Dear Mr. Wallo: I ELIMINATION RECOMMENDATION -- COLLEGES AND UN&ITIES I . The attached elimination recommendation was prepared in accordance with your suggestion during our meeting on 22 September!. The recommend includes 26

  10. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Beamline Proton beam 8.89 GeV/c protons from the Fermilab Booster are incident on a beryllium target. The beam is modeled with measured mean position and angle with Gaussian smearing. MiniBooNE simulates the effects of varying the spread in the beam and different focus points of the beam. The typical proton beam contains 4 x 10¹² protons delivered in a spill approximately 1.6 µs in duration. The absolute number of protons on target (p.o.t) is measured by two toroids upstream of the target.

  11. A=18Ne (1978AJ03)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8AJ03) (See Energy Level Diagrams for 18Ne) GENERAL: See also (1972AJ02) and Table 18.22 [Table of Energy Levels] (in PDF or PS). Model calculations: (1972EN03, 1974LO04). Electromagnetic transitions: (1970SI1J, 1972EN03, 1974LO04, 1976SH04, 1977BR03, 1977SA13). Special states: (1972EN03, 1972RA08). Muon- and pion-induced capture and reactions (See also reaction 5.): (1972MI11, 1974LI1N, 1975LI04, 1976HE1G, 1977MA2Q, 1977RO1U). Other theoretical calculations: (1970SI1J, 1972CA37, 1972RA08,

  12. CA Mr. Andrew Wallo, III, NE-23

    Office of Legacy Management (LM)

    ?9OQ, 95.5 L'E&nt Plaza, SW.. W.ashin@.m, D.C. 20024.2174, Tekphone: (202) 488AQOO 7117-03.B7.cdy.43 23 September 1987 CA Mr. Andrew Wallo, III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Oepartment of Energy Germantown, Maryland 20545 Dear Mr. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND UNIVERSITIES zh/ ! o-01 lM!tl5 ML)!o-05 PI 77!0> The attached elimination recoannendation was prepared in accordance . -1 rlL.0~ with your suggestion during our meeting on

  13. BooNE: Booster Neutrino Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Author Resources The following is a randomly ordered set of useful resources for people writing MiniBooNE publications:- Have a journal in mind when first putting together the paper. Each journal has LaTeX style files that can be downloaded from their web pages. There is a nice little LaTeX macro that will put line numbers by each line of your document. This makes it much easier for people to feedback comments on the paper. To use it just put \RequirePackage{lineno} just before the

  14. Prospects for antineutrino running at MiniBooNE

    SciTech Connect (OSTI)

    Wascko, M.O.; /Louisiana State U.

    2006-02-01

    MiniBooNE began running in antineutrino mode on 19 January, 2006. We describe the sensitivity of MiniBooNE to LSND-like {bar {nu}}{sub e} oscillations and outline a program of antineutrino cross-section measurements necessary for the next generation of neutrino oscillation experiments. We describe three independent methods of constraining wrong-sign (neutrino) backgrounds in an antineutrino beam, and their application to the MiniBooNE antineutrino analyses.

  15. The MicroBooNE Experiment - About the Physics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Physics Physics Goals MicroBooNE will collect neutrino interactions using the Booster Neutrino Beam at Fermilab and produce the first neutrino cross section measurements on argon in the 1 GeV energy range. MicroBooNE will also explore the currently unexplained excess of low energy electromagnetic events observed in the MiniBooNE experiment. Click here for public plots and physics distributions.

  16. A=19Ne (1959AJ76)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    59AJ76) (See Energy Level Diagram for 19Ne) GENERAL: See also Table 19.9 [Table of Energy Levels] (in PDF or PS). Theory: See (EL55A, RE55, RE55B, RA57, RE58). 1. 19Ne(β+)19F Qm = 3.256 The positron end point is 2.18 ± 0.03 (SC52A), 2.23 ± 0.05 (AL57), 2.24 ± 0.01 MeV (WE58B). The half-life is 17.4 ± 0.2 sec (HE59), 17.7 ± 0.1 (PE57), 18.3 ± 0.5 (AL57), 18.5 ± 0.5 (SC52A), 19 ± 1 (NA54B), 19.5 ± 1.0 (WE58B), 20.3 ± 0.5 sec (WH39). The absence of low-energy γ-rays (see 19F) indicates

  17. The MicroBooNE Experiment - Getting Started

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Getting Started on MicroBooNE Welcome to MicroBooNE! This page is designed to help new MicroBooNE collaborators find their way around the experiment and Fermilab. Table of Contents Fermilab ID, Computing Accounts, and Required Training Visas for non-US Citizens Traveling to Fermilab Housing/Hotels Getting Around Communication within the Collaboration Software Getting Help Step One First, make sure the PI of your institution has sent an email to the MicroBooNE spokespeople letting them know that

  18. Microsoft Word - HQ-#465026-v1-NNSA_SD_350_2_-_FINAL_9-6-CLEAN

    National Nuclear Security Administration (NNSA)

    and Project Management NNSA SUPPLEMENTAL DIRECTIVE Approved: 10-18-12 USE OF MANAGEMENT AND OPERATING CONTRACTOR EMPLOYEES FOR SERVICES TO THE NATIONAL NUCLEAR SECURITY ADMINISTRATION IN THE WASHINGTON, DC, AREA NATIONAL NUCLEAR SECURITY ADMINISTRATION Office of Acquisition and Project Management NA SD 350.2 Rev 1 NA SD 350.2 Rev 1 1 10-18-12 USE OF MANAGEMENT AND OPERATING CONTRACTOR EMPLOYEES FOR SERVICES TO THE NATIONAL NUCLEAR SECURITY ADMINISTRATION IN THE WASHINGTON, DC, AREA 1. PURPOSE.

  19. Source identification in acoustics and structural mechanics using Sierra/SD.

    SciTech Connect (OSTI)

    Walsh, Timothy Francis; Aquino, Wilkins; Ross, Michael

    2013-03-01

    In this report we derive both time and frequency-domain methods for inverse identification of sources in elastodynamics and acoustics. The inverse/design problem is cast in a PDE-constrained optimization framework with efficient computation of gradients using the adjoint method. The implementation of source inversion in Sierra/SD is described, and results from both time and frequency domain source inversion are compared to actual experimental data for a weapon store used in captive carry on a military aircraft. The inverse methodology is advantageous in that it provides a method for creating ground based acoustic and vibration tests that can reduce the actual number of flight tests, and thus, saving costs and time for the program.

  20. A=20Ne (1978AJ03)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8AJ03) (See Energy Level Diagrams for 20Ne) GENERAL: See also (1972AJ02) and Table 20.18 [Table of Energy Levels] (in PDF or PS). Shell model: (1970CR1A, 1971DE56, 1971RA1B, 1971ZO1A, 1972AB12, 1972AR1F, 1972AS13, 1972BO38, 1972BR1G, 1972JA24, 1972KA39, 1972KA67, 1972KH08, 1972KR1D, 1972KU1F, 1972LE13, 1972LE38, 1972MA07, 1972NI14, 1972RE03, 1972SA1B, 1972VO09, 1972WH04, 1973CO03, 1973DH1A, 1973EL04, 1973EN1C, 1973GI09, 1973HA05, 1973HE1F, 1973IC01, 1973IR01, 1973MA1K, 1973MC06, 1973MC1E,

  1. NE-23 List of California Sites NE-23 Hattie Car-well, SAN/NSQA Division

    Office of Legacy Management (LM)

    NE-23 Hattie Car-well, SAN/NSQA Division Attached for your information is the list of California sites we identified in our search of Manhattdn Engineer District records for the Formerly Utilized Sites Remedial Action Program (FUSRAP). None of the facilities listed qualified"fbr'FUSRAP:'~- The only site in California,that was included in FUSRAP was Gilman Hall on the University of California-Berkeley Campus. All California sites that are in our Surplus Facilities Management Prcgram are

  2. Neutrino Scattering Results from MiniBooNE R. Tayloe, Indiana...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Neutrino Scattering Results from MiniBooNE R. Tayloe, Indiana U. ECT workshop Trento, Italy, 1211 Outline: introduction, motivation MiniBooNE experiment MiniBooNE ...

  3. Mn4+ emission in pyrochlore oxides

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Du, Mao-Hua

    2015-01-01

    For the existing Mn4+ activated red phosphors have relatively low emission energies (or long emission wavelengths) and are therefore inefficient for general lighting. Density functional calculations are performed to study Mn4+ emission in rare-earth hafnate, zirconate, and stannate pyrochlore oxides (RE2Hf2O7, RE2Zr2O7, and RE2Sn2O7). We show how the different sizes of the RE3+ cation in these pyrochlores affect the local structure of the distorted MnO6 octahedron, the Mn–O hybridization, and the Mn4+ emission energy. The Mn4+ emission energies of many pyrochlores are found to be higher than those currently known for Mn4+ doped oxides and should be closer to thatmore » of Y2O3:Eu3+ (the current commercial red phosphor for fluorescent lighting). The O–Mn–O bond angle distortion in a MnO6 octahedron is shown to play an important role in weakening Mn–O hybridization and consequently increasing the Mn4+ emission energy. Our result shows that searching for materials that allow significant O–Mn–O bond angle distortion in a MnO6 octahedron is an effective approach to find new Mn4+ activated red phosphors with potential to replace the relatively expensive Y2O3:Eu3+ phosphor.« less

  4. An accumulator/compressor ring for Ne+ ions (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    An accumulatorcompressor ring for Ne+ ions Citation Details In-Document Search Title: An accumulatorcompressor ring for Ne+ ions The primary goal of the High Energy Density ...

  5. Djurcic_MiniBooNE_NuFact2011

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Report Zelimir Djurcic Argonne National Laboratory NuFact2011: 13th International Workshop on Neutrino Factories, Super Beams and Beta Beams August 1-6, 2011. Geneva, Switzerland 1 Outline * MiniBooNE Experiment Description * MiniBooNE s Neutrino Results * (New) MiniBooNE s Anti-neutrino Results * Summary 2 This signal looks very different from the others... * Much higher !m 2 = 0.1 - 10 eV 2 * Much smaller mixing angle * Only one experiment! In SM there are only 3 neutrinos !m 13 !m 12 !m 23 2

  6. MiniBooNE Numu/Numubar Disappearance Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    A Search for muon neutrino and antineutrino disappearance in MiniBooNE", arXiv:0903.2465 [hep-ex], Phys. Rev. Lett. 103, 061802 (2009) The following MiniBooNE information from the 2009 numu and numubar disappearance paper is made available to the public: Numu Disappearance ntuple file of MiniBooNE numu 90% confidence level sensitivity as a function of Dm2, for a 2-neutrino numu -> nux ocillation fit. The file contains 141 rows, with two columns: Dm2 value in the range 0.4 < Dm2 (eV2)

  7. DOE-NE-STD-1004-92 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    NE-STD-1004-92 DOE-NE-STD-1004-92 July 27, 2005 Root Cause Analysis Guidance Document Standard became Inactive This document is a guide for root cause analysis specified by DOE Order 5000.3A, "Occurrence Reporting and Processing of Operations Information." Causal factors identify program control deficiencies and guide early corrective actions. As such, root cause analysis is central to DOE Order 5000.3A. DOE-NE-STD-1004-92, Root Cause Analysis Guidance Document (689.62 KB) More

  8. Improved determination of the atmospheric parameters of the pulsating sdB star Feige 48

    SciTech Connect (OSTI)

    Latour, M.; Fontaine, G.; Brassard, P.; Green, E. M.; Chayer, P.

    2014-06-10

    As part of a multifaceted effort to better exploit the asteroseismological potential of the pulsating sdB star Feige 48, we present an improved spectroscopic analysis of that star based on new grids of NLTE, fully line-blanketed model atmospheres. To that end, we gathered four high signal-to-noise ratio time-averaged optical spectra of varying spectral resolutions from 1.0 to 8.7 , and we made use of the results of four independent studies to fix the abundances of the most important metals in the atmosphere of Feige 48. The mean atmospheric parameters we obtained from our four spectra of Feige 48 are: T {sub eff} = 29,850 60 K, log g = 5.46 0.01, and log N(He)/N(H) = 2.88 0.02. We also modeled, for the first time, the He II line at 1640 from the STIS archive spectrum of the star, and with this line we found an effective temperature and a surface gravity that match well with the values obtained with the optical data. With some fine tuning of the abundances of the metals visible in the optical domain, we were able to achieve a very good agreement between our best available spectrum and our best-fitting synthetic one. Our derived atmospheric parameters for Feige 48 are in rather good agreement with previous estimates based on less sophisticated models. This underlines the relatively small effects of the NLTE approach combined with line blanketing in the atmosphere of this particular star, implying that the current estimates of the atmospheric parameters of Feige 48 are reliable and secure.

  9. CRAD, NNSA - Maintenance (MN) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    NNSA - Maintenance (MN) CRAD, NNSA - Maintenance (MN) CRAD for Maintenance (MN). Criteria Review and Approach Documents (CRADs) that can be used to conduct a well-organized and thorough assessment of elements of safety and health programs. CRADs consist of a Performance Objective that identifies the expectation(s) or requirement(s) to be verified, which reflect the complete scope of the assessment; Criteria that provide specifics by which the performance objectives are measured, including

  10. {alpha}-cluster states in N{ne}Z nuclei

    SciTech Connect (OSTI)

    Goldberg, V. Z.; Rogachev, G. V.

    2012-10-20

    The importance of studies of {alpha}-Cluster structure in N{ne}Z light nuclei is discussed. Spin-parity assignments for the low-lying levels in {sup 10}C are suggested.

  11. New Oscillation Results From MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Intrinsic e 20 Background prediction Intrinsic nue External measurements - HARP p+Be for - Sanford-Wang fits to world K + K 0 data MiniBooNE data...

  12. MicroBooNE Project Critical Decision Documents

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Critical Decisions for MicroBooNE Documents CD-0 Mission Need CD-1 Selection of Alternatives CD-2/3a Performance Baseline and Long Lead Procurements CD-3b Start of Construction

  13. The MicroBooNE Project - Home Page

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    posted in the MicroBooNE DocDB, private access user-name is reviewer, password on request. ... Password access to these pages is necessary, user-name is reviewer, password on request. ...

  14. MiniBooNE LowE Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Excess of Electron-Like Events From a 1 GeV Neutrino Beam", arXiv:0812.2243 hep-ex, Phys. Rev. Lett. 102, 101802 (2009) The following MiniBooNE information from the 2009...

  15. MiniBooNE QE Cross Section Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Current Quasielastic Double Differential Cross section", arXiv:1002:2680 hep-ex, Phys. Rev. D81, 092005 (2010) The following MiniBooNE information from the 2010 CCQE cross...

  16. MiniBooNE/LSND Neutrino Oscillation Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    M. Sorel (IFIC - CSIC & U. Valencia) Workshop on Beyond Three Family Neutrino Oscillations May 3-4, 2011, LNGS (Italy) 1. LSND e (1993-2001) 2. MiniBooNE ...

  17. NE NEET-Reactor Materials Award Summaries May 2016.pdf

    Office of Environmental Management (EM)

    Idaho National Laboratory | Department of Energy NE & EERE Working Together: 5 Facts About the New Energy Innovation Lab at Idaho National Laboratory NE & EERE Working Together: 5 Facts About the New Energy Innovation Lab at Idaho National Laboratory April 24, 2014 - 5:57pm Addthis The Energy Innovation Laboratory at the Energy Department’s Idaho National Laboratory was dedicated earlier this week. The new facility enables researchers to tackle some of the most pressing

  18. MiniBooNE_LoNu_Shaevitz.ppt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MiniBooNE MiniBooNE Oscillation Results Oscillation Results and Future and Future Prospects Prospects Mike Mike Shaevitz Shaevitz - Columbia University - Columbia University 6th International Workshop on Low Energy Neutrino Physics 6th International Workshop on Low Energy Neutrino Physics Seoul National University Seoul National University ( ( Nov. 9 - 12, 2011) Nov. 9 - 12, 2011) 2 Neutrino Oscillation Summary Confirmed by K2K and Minos accelerator neutrino exps Confirmed by Kamland reactor

  19. High Precision Measurement of the 19Ne Lifetime

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Precision Measurement of the 19 Ne Lifetime by Leah Jacklyn Broussard Department of Physics Duke University Date: Approved: Albert Young Calvin Howell Kate Scholberg Berndt Mueller John Thomas Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Physics in the Graduate School of Duke University 2012 Abstract (Nuclear physics) High Precision Measurement of the 19 Ne Lifetime by Leah Jacklyn Broussard Department of Physics

  20. Neutral Current Elastic Interactions in MiniBooNE

    SciTech Connect (OSTI)

    Dharmapalan, Ranjan; /Alabama U.

    2011-10-01

    Neutral Current Elastic (NCE) interactions in MiniBooNE are discussed. In the neutrino mode MiniBooNE reported: the flux averaged NCE differential cross section as a function of four-momentum transferred squared, an axial mass (M{sub A}) measurement, and a measurement of the strange quark spin content of the nucleon, {Delta}s. In the antineutrino mode we present the background-subtracted data which is compared with the Monte Carlo predictions.

  1. DOE - Office of Legacy Management -- Elk River Reactor - MN 01

    Office of Legacy Management (LM)

    Elk River Reactor - MN 01 FUSRAP Considered Sites Site: Elk River Reactor (MN.01 ) Eliminated from consideration under FUSRAP - Reactor was dismantled and decommissioned by 1974 Designated Name: Not Designated Alternate Name: None Location: Elk River , Minnesota MN.01-1 Evaluation Year: 1985 MN.01-1 Site Operations: Boiling water reactor demonstration, research and development program MN.01-1 Site Disposition: Eliminated MN.01-1 Radioactive Materials Handled: None Indicated Primary Radioactive

  2. Magnetostructural phase transformations in Tb 1-x Mn 2 (Journal...

    Office of Scientific and Technical Information (OSTI)

    phase transformations in Tb 1-x Mn 2 Citation Details In-Document Search Title: Magnetostructural phase transformations in Tb 1-x Mn 2 Magnetism and phase transformations ...

  3. Magnetocrystalline anisotropy in UMn<mn>2mn>Ge>2mn> and related Mn-based actinide ferromagnets

    SciTech Connect (OSTI)

    Parker, David S.; Ghimire, Nirmal; Singleton, John; Thompson, J. D.; Bauer, Eric D.; Baumbach, Ryan; Mandrus, David; Li, Ling; Singh, David J.

    2015-05-04

    We present magnetization isotherms in pulsed magnetic fields up to 62 Tesla, supported by first principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m3 - in UMn<mn>2mn>Ge>2mn>. This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5 f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2 μB. Finally, we also find from theoretical calculations that a number of isostructural Mn-actinide compounds are expected to have similarly large anisotropy.

  4. MiniBooNE Antineutrino Data Van Nguyen Columbia University

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Moriond EW 2008 Coherent NC π 0 Production in the MiniBooNE Antineutrino Data Van Nguyen Columbia University for the MiniBooNE collaboration Moriond EW 2008 2 Moriond EW 2008 At low energy, NC π 0 's can be created through resonant and coherent production:  Resonant NC π 0 production:  Coherent NC π 0 production: (Signature: π 0 which is highly forward-going) NC π 0 Production 3 Moriond EW 2008 Why study coherent NC π 0 production? ➔ NC π 0 events are the dominant bgd to osc

  5. Exclusive Neutrino Cross Sections From MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Exclusive Neutrino Cross Sections From MiniBooNE Martin Tzanov University of Colorado PANIC 2008, 9-14 November, Eilat, ISRAEL Martin Tzanov, PANIC 2008 Neutrino Cross Sections Today * Precise knowledge needed for precise oscillation measurements. * Cross section well measured above 20 GeV. * Few measurements below 20 GeV. * 20-30 years old bubble chamber experiments (mostly H 2 , D 2 ). * Neutral current cross sections are even less understood. ν CC world data CC world data ν T2K, BooNE K2K,

  6. The MicroBooNE Experiment - About the Detector

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the Detector Cryostat delivered Assembly Photos The MicroBooNE time projection chamber (TPC) was assembled at Fermilab in 2012-2013, sealed in the cryostat at the end of 2013, and installed in the Liquid Argon Test Facilty (LArTF) in the Booster neutrino beamline in June 2014. Watch a video of the MicroBooNE detector move! Please check Assembly Photos for a slide-show of the effort These same photos are posted here in a simpler format Photos of Wires Taken from inside the cryostat in April 2015

  7. The MicroBooNE Experiment - At Work

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MicroBooNE at Work At Work Now The Getting Started Page holds links to help find your way around Fermilab services and prepare for working on the experiment. The MicroBooNE Contact List contains contact information for collaboration members. The Working Groups Page is a portal to these sub-sites. The Operations Page is a portal to the running detector. The Meetings Page lists the current regular meeting time slots, and also lists the collaboration meeting dates with links to the DocDB for past

  8. The MicroBooNE Experiment - Conference Talks

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Talks and Posters Once you have given a MicroBooNE presentation, please send your talk to Sam Zeller so it can be archived. If you have written proceedings to accompany your talk, please upload them to the MicroBooNE DocDB and send the document number to Sam. Also, remember that conference proceedings are required by Fermilab policy to be submitted to the Fermilab Technical Publications archive. Instructions for doing that are here. Click here for Future talks. Conference Presentations Speaker

  9. The MicroBooNE Experiment - Public Notes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Public Notes Page Back to the Publications Page 7/4/16 MICROBOONE-NOTE-1019-PUB Convolutional Neural Networks Applied to Neutrino Events in a Liquid Argon Time Projection Chamber 7/4/16 MICROBOONE-NOTE-1017-PUB A Method to Extract the Charge Distribution Arriving at the TPC Wire Planes in MicroBooNE 7/4/16 MICROBOONE-NOTE-1016-PUB Noise Characterization and Filtering in the MicroBooNE TPC 7/4/16 MICROBOONE-NOTE-1015-PUB The Pandora multi-algorithm approach to automated pattern recognition in LAr

  10. Magnetic coupling in ferromagnetic semiconductor (Ga,Mn)As/(Al,Ga,Mn)As bilayers

    SciTech Connect (OSTI)

    Wang, M.; Wadley, P.; Campion, R. P.; Rushforth, A. W.; Edmonds, K. W.; Gallagher, B. L.; Charlton, T. R.; Kinane, C. J.; Langridge, S.

    2015-08-07

    We report on a study of ferromagnetic semiconductor (Ga,Mn)As/(Al,Ga,Mn)As bilayers using magnetometry and polarized neutron reflectivity (PNR). From depth-resolved characterization of the magnetic structure obtained by PNR, we concluded that the (Ga,Mn)As and (Al,Ga,Mn)As layers have in-plane and perpendicular-to-plane magnetic easy axes, respectively, with weak interlayer coupling. Therefore, the layer magnetizations align perpendicular to each other under low magnetic fields and parallel at high fields.

  11. SSL Demonstration: Bridge Lighting, Minneapolis, MN

    SciTech Connect (OSTI)

    2014-10-01

    DOE Solid-State Lighting GATEWAY summary brief for Phase II report on the longer-term performance of LED lighting installed in 2008 on the I-35W Bridge in Minneapolis, MN.

  12. Appearance Results from MiniBooNE Georgia Karagiorgi Columbia University

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Appearance Results from MiniBooNE Georgia Karagiorgi Columbia University WIN'11 - Cape Town, South Africa 2 Outline of this talk: -- The LSND excess signal: Evidence for high-Δm 2 oscillations -- The MiniBooNE experiment -- MiniBooNE neutrino mode oscillation results: LSND signature refuted -- MiniBooNE antineutrino mode oscillation results: LSND signature confrmed ? -- Light sterile neutrino oscillations: Where we stand today -- Future searches: MiniBooNE, MicroBooNE 1993 -1998 1998 2001

  13. High Mn austenitic stainless steel

    DOE Patents [OSTI]

    Yamamoto, Yukinori [Oak Ridge, TN; Santella, Michael L [Knoxville, TN; Brady, Michael P [Oak Ridge, TN; Maziasz, Philip J [Oak Ridge, TN; Liu, Chain-tsuan [Knoxville, TN

    2010-07-13

    An austenitic stainless steel alloy includes, in weight percent: >4 to 15 Mn; 8 to 15 Ni; 14 to 16 Cr; 2.4 to 3 Al; 0.4 to 1 total of at least one of Nb and Ta; 0.05 to 0.2 C; 0.01 to 0.02 B; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1W; up to 3 Cu; up to 1 Si; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale including alumina, nanometer scale sized particles distributed throughout the microstructure, the particles including at least one of NbC and TaC, and a stable essentially single phase FCC austenitic matrix microstructure that is essentially delta-ferrite-free and essentially BCC-phase-free.

  14. The magnetic ordering in high magnetoresistance Mn-doped ZnO thin films

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Venkatesh, S.; Baras, A.; Lee, J. -S.; Roqan, I. S.

    2016-03-24

    Here, we studied the nature of magnetic ordering in Mn-doped ZnO thin films that exhibited ferromagnetism at 300 K and superparamagnetism at 5 K. We directly inter-related the magnetisation and magnetoresistance by invoking the polaronpercolation theory and variable range of hopping conduction below the metal-to-insulator transition. By obtaining a qualitative agreement between these two models, we attribute the ferromagnetism to the s-d exchange-induced spin splitting that was indicated by large positive magnetoresistance (~40 %). Low temperature superparamagnetism was attributed to the localization of carriers and non-interacting polaron clusters. This analysis can assist in understanding the presence or absence of ferromagnetismmore » in doped/un-doped ZnO.« less

  15. shaleoil1.pdf

    U.S. Energy Information Administration (EIA) Indexed Site

    ... USA CANADA SD ND MT Saskatchewan Manitoba Dunn Wa rd Dawson McL ea n McK en zie Morton ... SIGNIFICANT BAKKEN OIL FIELDS Bakken Shale Extent Canada MT ID IL IA WY NV NE SD MN ND WI ...

  16. DOE-NE Small Business Voucher Program Launched

    Broader source: Energy.gov [DOE]

    As part of the Gateway for Accelerated Innovation in Nuclear (GAIN) initiative, the NE Voucher program will provide up to $2 million in this pilot year for access to expertise, knowledge, and facilities of the National Laboratories and our partner facilities to help advance nuclear energy technologies.

  17. Nu2010_MiniBooNE_Osc.pptx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Most importantly, not a region of LE where LSND observed a significant signal Energy in MiniBooNE MeV 1250 475 333 MB Neutrino mode LE (mMeV) "LSND sweet spot" LSND * 6.5E20 ...

  18. U.S. Energy Information Administration | Annual Energy Outlook...

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    OH 1. NE 3. S1 4. S2 5. GF 6. OH 7. EN AL,MS MN,ND,SD IA,NE,MO,KS TX,LA,OK,AR MT,WY,ID CO,UT,NV AZ,NM 9. AM 11. C2 12. WS 13. MT 14. CU 15. ZN WV,MD,DC,DE 2. YP...

  19. ReNeW: Magnetic Fusion Energy Research Needs for the ITER Era...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ReNeW: Magnetic Fusion Energy Research Needs for the ITER Era Citation Details In-Document Search Title: ReNeW: Magnetic Fusion Energy Research Needs for the ITER Era Authors: ...

  20. DOE-NE Light Water Reactor Sustainability Program and EPRI Long...

    Office of Environmental Management (EM)

    DOE-NE Light Water Reactor Sustainability Program and EPRI Long-Term Operations Program - Joint Research and Development Plan DOE-NE Light Water Reactor Sustainability Program and ...

  1. Local environment of Mn in Mn delta-doped Si layers

    SciTech Connect (OSTI)

    Xiao, Q.F.; Kahwaji, S.; Monchesky, T.L.; Gordon, R.A.; Crozier, E.D.

    2009-11-09

    Dilute magnetic semiconductors combine both magnetic ordering and semiconducting behaviour, leading to potential spintronic applications. Silicon containing dilute Mn impurities is a potential dilute magnetic semiconductor. We have grown Mn delta-doped films by deposition of 0.7 of a monolayer of Mn on Si(001) by molecular beam epitaxy and capping the film with Si. The magnetic properties are likely sensitive to the distribution of Mn on substitutional or interstitial sites and the formation of metallic precipitates. We have used polarization-dependent XAFS to examine the local structure. We compare to a thicker MnSi film grown on Si(111) and also examine the influence of lead on the manganese environment when used as a surfactant in the growth process.

  2. Structural, magnetic, and superconducting properties of pulsed-laser-deposition-grown La<mn>1.85mn> Sr<mn>0.15mn> CuO<mn>4mn> / La<mn>2mn>/>3mn> Ca<mn>1mn>/>3mn> MnO>3mn> superlattices on (001)-oriented LaSrAlO<mn>4mn> substrates

    SciTech Connect (OSTI)

    Das, S.; Sen, K.; Marozau, I.; Uribe-Laverde, M. A.; Biskup, N.; Varela, M.; Khaydukov, Y.; Soltwedel, O.; Keller, T.; Döbeli, M.; Schneider, C. W.; Bernhard, C.

    2014-03-12

    Epitaxial La<mn>1.85mn> Sr<mn>0.15mn> CuO<mn>4mn> / La<mn>2mn>/>3mn> Ca<mn>1mn>/>3mn> MnO>3mn> (LSCO/LCMO) superlattices (SL) on (001)- oriented LaSrAlO4 substrates have been grown with pulsed laser deposition (PLD) technique. Their structural, magnetic and superconducting properties have been determined with in-situ reflection high energy electron diffraction (RHEED), x-ray diffraction, specular neutron reflectometry, scanning transmission electron microscopy (STEM), electric transport, and magnetization measurements. We find that despite the large mismatch between the in-plane lattice parameters of LSCO (a = 0.3779 nm) and LCMO (a = 0.387 nm) these superlattices can be grown epitaxially and with a high crystalline quality. While the first LSCO layer remains clamped to the LSAO substrate, a sizeable strain relaxation occurs already in the first LCMO layer. The following LSCO and LCMO layers adopt a nearly balanced state in which the tensile and compressive strain effects yield alternating in-plane lattice parameters with an almost constant average value. No major defects are observed in the LSCO layers, while a significant number of vertical antiphase boundaries are found in the LCMO layers. The LSCO layers remain superconducting with a relatively high superconducting onset temperature of Tconset ≈ 36 K. The macroscopic superconducting response is also evident in the magnetization data due to a weak diamagnetic signal below 10 K for H ∥ ab and a sizeable paramagnetic shift for H ∥ c that can be explained in terms of a vortex-pinning-induced flux compression. The LCMO layers maintain a

  3. Morgan Wascko Imperial College London MiniBooNE's First Neutrino Oscillation Result

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Wascko Imperial College London MiniBooNE's First Neutrino Oscillation Result Morgan Wascko CalTech Physics Research Conference 26 April, 2007 Outline * A short course in the physics of ν oscillations * What are neutrinos? Oscillations? * ν oscillation landscape * MiniBooNE * Experiment description * MiniBooNE's First Results * Neutrino Physics Big Picture * Next Steps for the Field * What has MiniBooNE told us? 2 Morgan Wascko CalTech Physics Research Conference 26 April, 2007 * Particle

  4. RESULTS OF THE MiniBooNE NEUTRINO OSCILLATION SEARCH E. D. Zimmerman

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    RESULTS OF THE MiniBooNE NEUTRINO OSCILLATION SEARCH E. D. Zimmerman University of Colorado American Physical Society Meeting Jacksonville, April 16, 2007 Results of the MiniBooNE Neutrino Oscillation Search * Introduction to MiniBooNE * The oscillation analysis * The initial results and their implications * The next steps MiniBooNE: E898 at Fermilab * Purpose is to test LSND with: * Higher energy * Different beam * Different oscillation signature * Different systematics * L=500 meters, E=0.5-1

  5. Properties of (Ga,Mn)As codoped with Li

    SciTech Connect (OSTI)

    Miyakozawa, Shohei; Chen, Lin; Matsukura, Fumihiro; Ohno, Hideo

    2014-06-02

    We grow Li codoped (Ga,Mn)As layers with nominal Mn composition up to 0.15 by molecular beam epitaxy. The layers before and after annealing are characterized by x-ray diffraction, transport, magnetization, and ferromagnetic resonance measurements. The codoping with Li reduces the lattice constant and electrical resistivity of (Ga,Mn)As after annealing. We find that (Ga,Mn)As:Li takes similar Curie temperature to that of (Ga,Mn)As, but with pronounced magnetic moments and in-plane magnetic anisotropy, indicating that the Li codoping has nontrivial effects on the magnetic properties of (Ga,Mn)As.

  6. Activation of c-myb by 5' retrovirus promoter insertion in myeloid neoplasms is dependent upon an intact alternative splice donor site (SD') in gag

    SciTech Connect (OSTI)

    Ramirez, Jean Marie; Houzet, Laurent; Koller, Richard; Bies, Juraj; Wolff, Linda; Mougel, Marylene . E-mail: mmougel@univ-montp1.fr

    2004-12-20

    Alternative splicing in Mo-MuLV recruits a splice donor site, SD', within the gag that is required for optimal replication in vitro. Remarkably, this SD' site was also found to be utilized for production of oncogenic gag-myb fusion RNA in 100% of murine-induced myeloid leukemia (MML) in pristane-treated BALB/c mice. Therefore, we investigated the influence of silent mutations of SD' in this model. Although there was no decrease in the overall incidence of disease, there was a decrease in the incidence of myeloid leukemia with a concomitant increase in lymphoid leukemia. Importantly, there was a complete lack of myeloid tumors associated with 5' insertional mutagenic activation of c-myb, suggesting the specific requirement of the SD' site in this mechanism.

  7. Overview of DOE-NE Proliferation and Terrorism Risk Assessment

    SciTech Connect (OSTI)

    Sadasivan, Pratap

    2012-08-24

    Research objectives are: (1) Develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of current reactors; (2) Develop improvements in the affordability of new reactors to enable nuclear energy; (3) Develop Sustainable Nuclear Fuel Cycles; and (4) Understand and minimize the risks of nuclear proliferation and terrorism. The goal is to enable the use of risk information to inform NE R&D program planning. The PTRA program supports DOE-NE's goal of using risk information to inform R&D program planning. The FY12 PTRA program is focused on terrorism risk. The program includes a mix of innovative methods that support the general practice of risk assessments, and selected applications.

  8. Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhang, Qiang; Tian, Wei; Peterson, Spencer G.; Dennis, Kevin W.; Vaknin, David

    2015-02-18

    Structure and magnetic properties of high-quality polycrystlline CeMnAsO, a parent compound of the “1111”-type oxypnictides, have been investigated using neutron powder diffraction and magnetization measurements. We find that CeMnAsO undergoes a C-type antiferromagnetic order with Mn2+(S = 5/2) moments pointing along the c axis below a relatively high Néel temperature of TN = 347(1) K. Below TSR = 35 K, two simultaneous transitions occur where the Mn moments reorient from the c axis to the ab plane preserving the C-type magnetic order, and Ce moments undergo long-range AFM ordering with antiparallel moments pointing in the ab plane. Another transition tomore » a noncollinear magnetic structure occurs below 7 K. The ordered moments of Mn and Ce at 2 K are 3.32(4) μB and 0.81(4)μB, respectively. We find that CeMnAsO primarily falls into the category of a local-moment antiferromagnetic insulator in which the nearest-neighbor interaction (J1) is dominant with J2 < J1/2 in the context of J1 – J2 – Jc model. The spin reorientation transition driven by the coupling between Ce and the transition metal seems to be common to Mn, Fe, and Cr ions, but not to Co and Ni ions in the isostructural oxypnictides. As a result, a schematic illustration of magnetic structures in Mn and Ce sublattices in CeMnAsO is presented.« less

  9. Microsoft PowerPoint - TAUP_07_MiniBooNE.ppt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MinibooNE Oscillation Results and Implications Mike Shaevitz Columbia University for the MiniBooNE Collaboration 2 Outline * MiniBooNE Experiment and Analysis Techniques * MiniBooNE First Oscillation Result * Going Beyond the First Result * Future Plans and Prospects 3 LSND observed a (~3.8σ) excess of⎯ν e events in a pure⎯ν μ beam: 87.9 ± 22.4 ± 6.0 events MiniBooNE was Prompted by the Positive LSND Result Oscillation Probability: ( ) (0.264 0.067 0.045)% e P μ ν ν → = ± ± The

  10. MICROBOONE PHYSICS Ben Carls Fermilab MicroBooNE Physics Outline

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PHYSICS Ben Carls Fermilab MicroBooNE Physics Outline * The detector and beam - MicroBooNE TPC - Booster and NuMI beams at Fermilab * Oscillation physics - Shed light on the MiniBooNE low energy excess * Low energy neutrino cross sections * Non-accelerator topics - Supernova neutrino detection - Proton decay backgrounds 2 B. Carls, Fermilab MicroBooNE Physics MicroBooNE Detector * 60 ton fiducial volume (of 170 tons total) liquid Argon TPC * TPC consists of 3 planes of wires; vertical Y, ±60°

  11. PNM Resources 2401 Aztec NE, MS-Z100

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PNM Resources 2401 Aztec NE, MS-Z100 Albuquerque, NM 87107 505-241-2025 Fax 505 241-2384 PNMResources.com October 29, 2013 Mr. Christopher Lawrence Office of Electricity Delivery and Energy Reliability (OE-20) U.S. Department of Energy 1000 Independence Avenue, SW Washington, DC 20585 Submitted electronically via email to: Christopher.Lawrence@hq.doe.gov Dear Mr. Lawrence: Subject: Department of Energy (DOE)- Improving Performance of Federal Permitting and Review of Infrastructure Projects,

  12. Microsoft PowerPoint - MiniBooNE Neutrino 2008

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Oscillation Searches Steve Brice (Fermilab) for the MiniBooNE Collaboration Neutrino 2008 Neutrino 2008 Steve Brice (FNAL) 2 Outline * Electron Neutrino Appearance - Oscillation Result - π 0 Rate Measurement - Combining Analyses - Compatibility of High ∆m 2 Measurements - Low Energy Electron Candidate Excess - Data from NuMI Beam * Muon Neutrino Disappearance * Anti-Electron Neutrino Appearance * Summary Neutrino 2008 Steve Brice (FNAL) 3 2 National Laboratories, 14 Universities, 80

  13. Magnetoelectric coupling tuned by competing anisotropies in Mn...

    Office of Scientific and Technical Information (OSTI)

    Magnetoelectric coupling tuned by competing anisotropies in Mn 1 - x Ni x TiO 3 Prev Next Title: Magnetoelectric coupling tuned by competing anisotropies in Mn 1 - x Ni x TiO ...

  14. fileiSdHKL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  15. Influence of interstitial Mn on magnetism in room-temperature ferromagnet Mn(1+delta)Sb

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Taylor, Alice E; Berlijn, Tom; Hahn, Steven E; May, Andrew F; Williams, Travis J; Poudel, Lekhanath N; Calder, Stuart A; Fishman, Randy Scott; Stone, Matthew B; Aczel, Adam A; et al

    2015-01-01

    We report elastic and inelastic neutron scattering measurements of the high-TC ferromagnet Mn(1+delta)Sb. Measurements were performed on a large, TC = 434 K, single crystal with interstitial Mn content of delta=0.13. The neutron diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn, and find the interstitial to be magnetic in agreement with the diffraction data. The inelastic neutron scattering measurements reveal two features in the magnetic dynamics: i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (Hmore » K 2n), and ii) a broad, non-dispersive signal centered at forbidden Bragg positions (H K 2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave theory calculations, and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the int« less

  16. Influence of interstitial Mn on magnetism in room-temperature ferromagnet Mn(1+delta)Sb

    SciTech Connect (OSTI)

    Taylor, Alice E; Berlijn, Tom; Hahn, Steven E; May, Andrew F; Williams, Travis J; Poudel, Lekhanath N; Calder, Stuart A; Fishman, Randy Scott; Stone, Matthew B; Aczel, Adam A; Cao, Huibo; Lumsden, Mark D; Christianson, Andrew D

    2015-01-01

    We report elastic and inelastic neutron scattering measurements of the high-TC ferromagnet Mn(1+delta)Sb. Measurements were performed on a large, TC = 434 K, single crystal with interstitial Mn content of delta=0.13. The neutron diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn, and find the interstitial to be magnetic in agreement with the diffraction data. The inelastic neutron scattering measurements reveal two features in the magnetic dynamics: i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (H K 2n), and ii) a broad, non-dispersive signal centered at forbidden Bragg positions (H K 2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave theory calculations, and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the int

  17. CaMn2Al10: Itinerant Mn magnetism on the verge of magnetic order

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Steinke, L.; Simonson, J. W.; Yin, W. -G.; Smith, G. J.; Kistner-Morris, J. J.; Zellman, S.; Puri, A.; Aronson, M. C.

    2015-07-24

    We report the discovery of CaMn2Al10, a metal with strong magnetic anisotropy and moderate electronic correlations. Magnetization measurements find a Curie-Weiss moment of 0.83μB/Mn, significantly reduced from the Hund's rule value, and the magnetic entropy obtained from specific heat measurements is correspondingly small, only ≈ 9% of Rln2. These results imply that the Mn magnetism is highly itinerant, a conclusion supported by density functional theory calculations that find strong Mn-Al hybridization. Consistent with the layered nature of the crystal structure, the magnetic susceptibility χ is anisotropic below 20 K, with a maximum ratio of χ[010]/χ[001] ≈ 3.5. A strong power-lawmore » divergence χ(T) ~ T–1.2 below 20 K implies incipient ferromagnetic order, an Arrott plot analysis of the magnetization suggests a vanishing low Curie temperature TC ~ 0. Our experiments indicate that CaMn2Al10 is a rare example of a system where the weak and itinerant Mn-based magnetism is poised on the verge of order.« less

  18. Opti-MN Impact House Presentation | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Opti-MN Impact House Presentation Opti-MN Impact House Presentation Opti-MN was the Grand Winner of the 2015 Race to Zero Student Design Competition. View the presentation for the Opti-MN Impact House below. Read a full list of the winning teams. Opti-MN Presentation (5.74 MB) More Documents & Publications 2015 Race to Zero Competition Grand Winner and Grand Winner Finalist Team Submissions 2016 Race to Zero Competition Winner Team Presentations 2014 Race to Zero Student Design Competition:

  19. NE-24 Unlverslty of Chicayo Remedial Action Plan

    Office of Legacy Management (LM)

    (YJ 4 tlsj .?I2 416 17 1983 NE-24 Unlverslty of Chicayo Remedial Action Plan 22&d 7 IA +-- E. I.. Keller, Director Technical Services Division Oak Ridge Operations Ufflce In response to your memorandum dated July 29, 1983, the Field Task Proposal/Agreement (FTP/A) received frw Aryonne National Laboratory (ANL) appears to be satisfactory, and this office concurs in the use of ANL to provide the decontamination effort as noted in the FTP/A. The final decontaminatton report should Include the

  20. MiniBooNE LowE Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Unexplained Excess of Electron-Like Events From a 1 GeV Neutrino Beam", arXiv:0812.2243 [hep-ex], Phys. Rev. Lett. 102, 101802 (2009) The following MiniBooNE information from the 2009 updated nue oscillation paper is made available to the public: Energy Range for Default Oscillation Fit (475 MeV - 3000 MeV reconstructed neutrino energy) 1D array of bin boundaries in electron neutrino reconstructed neutrino energy 1D array of observed electron neutrino candidate events per reconstructed

  1. Exclusive Neutrino Cross Sections From MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    5[BOPW -PVJTJBOB 4UBUF 6OJWFSTJUZ /V'BDU 8PSLTIPQ 8JMMJBNTCVSH +VMZ -BUFTU $SPTT 4FDUJPO 3FTVMUT GSPN .JOJ#PP/& Test of LSND within the context of e appearance only is an essential first step: Keep the same L/E w )JHIFS FOFSHZ BOE MPOHFS CBTFMJOF r & r (F7 L=500m w %JGGFSFOU CFBN w %JGGFSFOU PTDJMMBUJPO TJHOBUVSF F w %JGGFSFOU TZTUFNBUJDT w "OUJOFVUSJOP DBQBCMF CFBN MiniBooNE Experiment ± E898 at Fermilab Booster K + target and horn detector dirt decay region absorber primary beam

  2. Office of Nuclear Energy Doe/ne-0143

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    energy Office of Nuclear Energy Doe/ne-0143 Table of Contents Lesson 1 - Energy Basics Lesson 2 - Electricity Basics Lesson 3 - Atoms and Isotopes Lesson 4 - Ionizing Radiation Lesson 5 - Fission, Chain Reactions Lesson 6 - Atom to Electricity Lesson 7 - Waste from Nuclear Power Plants Lesson 8 - Concerns Lesson 9 - Energy and You 1 Lesson 1 Energy Basics ENERGY BASICS What is energy? Energy is the ability to do work. But what does that really mean? You might think of work as cleaning your room,

  3. CA CAIOlf Mr. Andrew Wallo. III, NE-23

    Office of Legacy Management (LM)

    kire 7900. 955 L*E,,fa,u PLUG S. W.. Washin@ on. D.C. 20024-2174, Tekphme: (202) 488-6000 7117-03.87.cdy.43 23 September 1987 CA CAIOlf Mr. Andrew Wallo. III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 CT.05 FL .0-o/ lti.Ob id.Or Dear Mr. Wallo: In/. O-01 flA.05 ELIMINATION RECOMMENDATION -- COLLEGES AND UNIVERSITIES Mbj.o-03 I4 v.o+ The attached elimination recommendation was prepared in accordance ML.o= with your

  4. CA M r. Andrew Wallo, III, NE-23

    Office of Legacy Management (LM)

    i900,9SS L%nfam Phm, S. W.. Washington. D.C. 20024.2174, Tlkphme: (20.7) 4S.S-M)o 7117-03.87.cdy.43 23 September 1987 CA M r. Andrew Wallo, III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear M r. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND UNIVERSITIES I - The attached elimination recommendation was prepared in accordance M1.oS with your suggestion during our meeting on 22 September. The recommendation nO.O-02

  5. CA M r. Andrew Wallo, III. NE-23

    Office of Legacy Management (LM)

    i5W 95.5 L' E&nt plom. S. W.:. Washingr on. D.C. ZOOX2i74, Tekphm: (202) 488-6OGb 7II7-03.87.cdy.43 23 September 1987. Ii CA M r. Andrew Wallo, III. NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear M r. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND UNIVERSITIES pqq.0' 05 PI ;p.03- The attached elimination recommendation was prepared in accordance ,I ML.05 with your suggestion during our meeting on 22 September. The

  6. Idaho National Laboratory DOE-NE's National Nuclear Capability-

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    -2023 Idaho National Laboratory DOE-NE's National Nuclear Capability- Developing and Maintaining the INL Infrastructure TEN-YEAR SITE PLAN DOE/ID-11474 Final June 2012 Sustainable INL continues to exceed DOE goals for reduction in the use of petroleum fuels - running its entire bus fleet on biodiesel while converting 75% of its light-duty fleet to E85 fuel. The Energy Systems Laboratory (ESL), slated for completion this year, will be a state-of-the-art laboratory with high-bay lab space where

  7. Unexpected crystal and magnetic structures in MnCu4In and MnCu4Sn

    SciTech Connect (OSTI)

    Provino, A.; Paudyal, D.; Fornasini, ML; Dhiman, I.; Dhar, SK.; Das, A.; Mudryk, Y.; Manfrinetti, P.; Pecharsky, VK

    2013-01-29

    We discovered a new compound MnCu4In with its own hexagonal structure type (hP12-P63mc, ternary ordered derivative of the hexagonal MgZn2-type) that becomes ferromagnetic at TC = 540 K. This transition temperature is higher than that found in the MnCu2In and MnCu2Sn alloys. In contrast, the homologous compound MnCu4Sn, which crystallizes in the cubic MgCu4Sn-type, orders antiferromagnetically with TN = 110 K. The neutron diffraction studies show ferromagnetic spin orientation in the {1 0 1} plane in MnCu4In with a magnetic moment of 4.5 ?B/Mn at 22 K, and a corresponding value of 4.7 ?B/Mn in the antiferromagnetic MnCu4Sn with propagation vector View the MathML source. The first-principles electronic structure calculations show that the unexpected difference in both magnetic and crystal structures of MnCu4In and MnCu4Sn is due to the difference in the Mn-3d bands and exchange interactions relating to different crystal anisotropy, coordination numbers, and interatomic distances.

  8. Solid Solution Phases in the Olivine-Type LiMnPO4/MnPO4 System

    SciTech Connect (OSTI)

    Chen, Guoying; Richardson, Thomas J.

    2009-04-07

    Nonstoichiometry is reported in the LiMnPO{sub 4}/MnPO{sub 4} system for the first time. As lithium is removed from crystalline LiMnPO{sub 4} by chemical or electrochemical methods, the resulting two phase mixture consists of stoichiometric LiMnPO{sub 4} and a delithiated phase, Li{sub y}MnPO{sub 4}, whose lattice parameters depend upon the global extent of delithiation and on the crystalline domain size of the delithiated phase. This behavior is reproduced during electrochemical insertion of lithium. Again, no evidence for nonstoichiometry was found in the vicinity of LiMnPO{sub 4}. Attempts to create single phase solid solutions by heating mixtures of the two phases failed due to the thermal instability of Li{sub y}MnPO{sub 4}.

  9. Princeton graduate student Imène Goumiri creates computer program that

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    helps stabilize fusion plasmas | Princeton Plasma Physics Lab Princeton graduate student Imène Goumiri creates computer program that helps stabilize fusion plasmas By John Greenwald and Raphael Rosen April 14, 2016 Tweet Widget Google Plus One Share on Facebook Imène Goumiri led the design of a controller. (Photo by Elle Starkman/Office of Communications) Imène Goumiri led the design of a controller. Imène Goumiri, a Princeton University graduate student, has worked with physicists at

  10. Demonstration Assessment of LED Roadway Lighting: NE Cully Blvd., Portland, OR

    SciTech Connect (OSTI)

    Royer, M. P.; Poplawski, M. E.; Tuenge, J. R.

    2012-08-01

    GATEWAY program report on a demonstration of LED roadway lighting on NE Cully Boulevard in Portland, OR, a residential collector road.

  11. MiniBooNE's First Oscillation Result Morgan Wascko Imperial College...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6 July, 2007 Meson Production 9 MiniBooNE Overview * External meson production data * HARP data (CERN) * Parametrisation of cross- sections * Sanford-Wang for pions * Feynman...

  12. High-energy physics detector MicroBooNE sees first accelerator-born

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    neutrinos MicroBooNE sees first accelerator-born neutrinos High-energy physics detector MicroBooNE sees first accelerator-born neutrinos The principal purpose of the detector is to confirm or deny the existence of a hypothetical particle known as the sterile neutrino. November 2, 2015 An accelerator-born neutrino candidate, spotted with the MicroBooNE detector. Image courtesy Fermilab. An accelerator-born neutrino candidate, spotted with the MicroBooNE detector. Image courtesy Fermilab.

  13. Microsoft PowerPoint - TAUP_09_MiniBooNE.ppt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New Results from the MiniBooNE Booster Neutrino Experiment Mike Shaevitz Columbia University for the MiniBooNE Collaboration 2 Outline * Overview of MiniBooNE Beam and Detector * Brief Presentation of New Cross Section Results * Recent Oscillation Results - ν e and⎯ν e appearance - ν µ and⎯ν µ disappearance - Offaxis results from NuMI beam * Future Plans and Prospects 3 LSND observed a (~3.8σ) excess of⎯ν e events in a pure⎯ν µ beam: 87.9 ± 22.4 ± 6.0 events MiniBooNE was

  14. MiniBooNE: Up and Running Morgan Wascko Morgan Wascko Louisiana...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Wascko Louisiana State University Louisiana State University Morgan O. Wascko, LSU Yang Institute Conference 11 October, 2002 MiniBooNE detector at Fermi National Accelerator...

  15. 2014 Annual EM/NE/SC SQA Support Group Meeting | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    4 Annual EM/NE/SC SQA Support Group Meeting 2014 Annual EM/NE/SC SQA Support Group Meeting 2014 Annual EM/NE/SC SQA Support Group Meeting The 2014 Annual Face-to-Face Meeting of the Environmental Management (EM), Nuclear Energy (NE), and Science (SC) Software Quality Assurance (SQA) Support Group (SG) was held May 6-8, 2014. This meeting was hosted by the Office of Safeguards, Security and Emergency Services (OSSES) at the Savannah River Site (SRS). The Chief of Nuclear Safety (CNS) sponsors

  16. 2015 Annual EM/NE/SC SQA Support Group Meeting | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    5 Annual EM/NE/SC SQA Support Group Meeting 2015 Annual EM/NE/SC SQA Support Group Meeting 2015 Annual EM/NE/SC SQA Support Group Meeting The Chief of Nuclear Safety (CNS) formed the Environmental Management (EM), Nuclear Energy (NE), and Science (SC) Software Quality Assurance (SQA) Support Group (SG) in March 2007. The first Annual Meeting was held August 2008. The 8th Annual Meeting will be held May 11-14, 2015. This year the Annual Meeting will be hosted by EM's Office of River Protection in

  17. Kaon Monitoring in MiniBooNE: The LMC Detector E. D. Zimmerman

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Kaon Monitoring in MiniBooNE: The LMC Detector E. D. Zimmerman University of Colorado NBI 2003 KEK, Tsukuba November 10, 2003 Kaon Monitoring at MiniBooNE 1) K-decay ν e background at BooNE K production estimates 2) Decay kinematics 3) The "Little Muon Counter" (LMC) Concept/Placement Civil construction/infrastructure Collimator Fiber Tracker Temporary detector Status K-decay ν e background MiniBooNE will see ~200-400 ν e from K + and K 0 L decays each year -- comparable to the

  18. Analysis of Neutral Current 0 Events at MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Neutral Current π 0 Events at MiniBooNE Colin Anderson April 14, 2008 The Experiment Analysis Outline Experiment MiniBooNE Description NC π 0 Overview Analysis Selection and Reconstruction of Events Rate Measurement Correcting Monte Carlo w/ Data Coherent Fraction Measurement C.E. Anderson MiniBooNE NC π 0 Analysis 2/22 The Experiment Analysis MiniBooNE ν e appearance search designed to confirm or refute the LSND result The Beam 8 GeV p's from Booster beam directed at a Be target Produced π

  19. Oscillations results from the MiniBooNE experiment Alexis Aguilar-Arévalo (ICN-UNAM),

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Oscillations results from the MiniBooNE experiment Alexis Aguilar-Arévalo (ICN-UNAM), for the MiniBooNE collaboration SILAFAE 2010 10 December 2010, Valparaíso, Chile 2 Outlook MiniBooNE Motivation MiniBooNE Description Summary of past Results New Antineutrino Result Future outlook Conclusions A. Aguilar-Arévalo (ICN-UNAM) SILAFAE 2010, Valparaíso, Chile December 6-12, 2010 MiniBooNE Collaboration 3 MiniBooNE motivation ● LSND experiment (Los Alamos) ● Excess of  e in a  

  20. Investigations of element spatial correlation in Mn-promoted...

    Office of Scientific and Technical Information (OSTI)

    Investigations of element spatial correlation in Mn-promoted Co-based Fischer-Tropsch synthesis catalysts This content will become publicly available on June 4, 2017 Title: ...

  1. THE GENESIS SOLAR WIND CONCENTRATOR TARGET: MASS FRACTIONATION CHARACTERISED BY NE ISOTOPES

    SciTech Connect (OSTI)

    WIENS, ROGER C.; OLINGER, C.; HEBER, V.S.; REISENFELD, D.B.; BURNETT, D.S.; ALLTON, J.H.; BAUR, H.; WIECHERT, U.; WIELER, R.

    2007-01-02

    The concentrator on Genesis provides samples of increased fluences of solar wind ions for precise determination of the oxygen isotopic composition of the solar wind. The concentration process caused mass fractionation as function of the radial target position. They measured the fractionation using Ne released by UV laser ablation along two arms of the gold cross from the concentrator target to compare measured Ne with modeled Ne. The latter is based on simulations using actual conditions of the solar wind during Genesis operation. Measured Ne abundances and isotopic composition of both arms agree within uncertainties indicating a radial symmetric concentration process. Ne data reveal a maximum concentration factor of {approx} 30% at the target center and a target-wide fractionation of Ne isotopes of 3.8%/amu with monotonously decreasing {sup 20}Ne/{sup 22}Ne ratios towards the center. The experimentally determined data, in particular the isotopic fractionation, differ from the modeled data. They discuss potential reasons and propose future attempts to overcome these disagreements.

  2. Mutual neutralization of atomic rare-gas cations (Ne{sup +}, Ar{sup +}, Kr{sup +}, Xe{sup +}) with atomic halide anions (Cl{sup −}, Br{sup −}, I{sup −})

    SciTech Connect (OSTI)

    Shuman, Nicholas S.; Miller, Thomas M.; Viggiano, Albert A.; Johnsen, Rainer

    2014-01-28

    We report thermal rate coefficients for 12 reactions of rare gas cations (Ne{sup +}, Ar{sup +}, Kr{sup +}, Xe{sup +}) with halide anions (Cl{sup −}, Br{sup −}, I{sup −}), comprising both mutual neutralization (MN) and transfer ionization. No rate coefficients have been previously reported for these reactions; however, the development of the Variable Electron and Neutral Density Attachment Mass Spectrometry technique makes it possible to measure the difference of the rate coefficients for pairs of parallel reactions in a Flowing Afterglow-Langmuir Probe apparatus. Measurements of 18 such combinations of competing reaction pairs yield an over-determined data set from which a consistent set of rate coefficients of the 12 MN reactions can be deduced. Unlike rate coefficients of MN reactions involving at least one polyatomic ion, which vary by at most a factor of ∼3, those of the atom-atom reactions vary by at least a factor 60 depending on the species. It is found that the rate coefficients involving light rare-gas ions are larger than those for the heavier rare-gas ions, but the opposite trend is observed in the progression from Cl{sup −} to I{sup −}. The largest rate coefficient is 6.5 × 10{sup −8} cm{sup 3} s{sup −1} for Ne{sup +} with I{sup −}. Rate coefficients for Ar{sup +}, Kr{sup +}, and Xe{sup +} reacting with Br{sub 2}{sup −} are also reported.

  3. Microsoft Word - MnO_Reduction bh

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2016 Figure 1. Schematic of flow-through system developed at SSRL. A reaction vessel with manganese oxides and media required for microbial experiments was kept anoxic with nitrogen gas and pH was measured using an environmental pH probe. A portion of the fluid was sampled using a peristaltic pump through anaerobic tubing to the beam line hutch where the x-ray beam sampled the Mn coordination environment, mineralogy, and redox state through a Kapton tape window on an x-ray flow-through cell.

  4. Spin caloritronics in graphene with Mn

    SciTech Connect (OSTI)

    Torres, Alberto Lima, Matheus P. Fazzio, A.; Silva, Antnio J. R. da

    2014-02-17

    We show that graphene with Mn adatoms trapped at single vacancies features spin-dependent Seebeck effect, thus enabling the use of this material for spin caloritronics. A gate potential can be used to tune its thermoelectric properties in a way it presents either a total spin polarized current, flowing in one given direction, or currents for both spins flowing in opposite directions without net charge transport. Moreover, we show that the thermal magnetoresistance can be tuned between ?100% and +100% by varying a gate potential.

  5. The MiniBooNE detector technical design report

    SciTech Connect (OSTI)

    I. Stancu et al.

    2003-04-18

    The MiniBooNE experiment [1] is motivated by the LSND observation, [2] which has been interpreted as {nu}{sub {mu}} {yields} {nu}{sub e} oscillations, and by the atmospheric neutrino deficit, [3,4,5] which may be ascribed to {nu}{sub {mu}} oscillations into another type of neutrino. MiniBooNE is a single-detector experiment designed to: obtain {approx} 1000 {nu}{sub {mu}} {yields} {nu}{sub e} events if the LSND signal is due to {nu}{sub {mu}} {yields} {nu}{sub e} oscillations, establishing the oscillation signal at the > 5{sigma} level as shown in Fig. 1.1; extend the search for {nu}{sub {mu}} {yields} {nu}{sub e} oscillations significantly beyond what has been studied previously if no signal is observed; search for {nu}{sub {mu}} disappearance to address the atmospheric neutrino deficit with a signal that is a suppression of the rate of {nu}{sub {mu}}C {yields} {mu}N events from the expected 600,000 per year; measure the oscillation parameters as shown in Fig. 1.2 if oscillations are observed; and test CP conservation in the lepton sector if oscillations are observed by running with separate {nu}{sub {mu}} and {bar {nu}}{sub {mu}} beams. The detector will consist of a spherical tank 6.1 m (20 feet) in radius, as shown in Fig. 1.3, that stands in a 45-foot diameter cylindrical vault. An inner tank structure at 5.75 m radius will support 1280 8-inch phototubes (10% coverage) pointed inward and optically isolated from the outer region of the tank. The tank will be filled with 807 t of mineral oil, resulting in a 445 t fiducial volume. The outer tank volume will serve as a veto shield for identifying particles both entering and leaving the detector with 240 phototubes mounted on the tank wall. Above the detector tank will be an electronics enclosure that houses the fast electronics and data acquisition system and a utilities enclosure that houses the plumbing, overflow tank, and calibration laser. The detector will be located {approx} 550 m from the Booster neutrino

  6. Magnetic Moment Enhancement for Mn7 Cluster on Graphene

    SciTech Connect (OSTI)

    Liu, Xiaojie; Wang, Cai-Zhuang; Lin, Hai-Qing; Ho, Kai-Ming

    2014-08-21

    Mn7 cluster on graphene with different structural motifs and magnetic orders are investigated systematically by first-principles calculations. The calculations show that Mn7 on graphene prefers a two-layer motif and exhibits a ferrimagnetic coupling. The magnetic moment of the Mn7 cluster increases from 5.0 ?B at its free-standing state to about 6.0 ?B upon adsorption on graphene. Mn7 cluster also induces about 0.3 ?B of magnetic moment in the graphene layer, leading to an overall enhancement of 1.3 ?B magnetic moment for Mn7 on graphene. Detail electron transfer and bonding analysis have been carried out to investigate the origin of the magnetic enhancement.

  7. The Ne-to-O abundance ratio of the interstellar medium from IBEX-Lo observations

    SciTech Connect (OSTI)

    Park, J.; Kucharek, H.; Möbius, E.; Leonard, T.; Bzowski, M.; Sokół, J. M.; Kubiak, M. A.; Fuselier, S. A.; McComas, D. J.

    2014-11-01

    In this paper we report on a two-year study to estimate the Ne/O abundance ratio in the gas phase of the local interstellar cloud (LIC). Based on the first two years of observations with the Interstellar Boundary Explorer, we determined the fluxes of interstellar neutral (ISN) O and Ne atoms at the Earth's orbit in spring 2009 and 2010. A temporal variation of the Ne/O abundance ratio at the Earth's orbit could be expected due to solar cycle-related effects such as changes of ionization. However, this study shows that there is no significant change in the Ne/O ratio at the Earths orbit from 2009 to 2010. We used time-dependent survival probabilities of the ISNs to calculate the Ne/O abundance ratio at the termination shock. Then we estimated the Ne/O abundance ratio in the gas phase of the LIC with the use of filtration factors and the ionization fractions. From our analysis, the Ne/O abundance ratio in the LIC is 0.33 ± 0.07, which is in agreement with the abundance ratio inferred from pickup-ion measurements.

  8. Mn4+ emission in pyrochlore oxides

    SciTech Connect (OSTI)

    Du, Mao-Hua

    2015-01-01

    For the existing Mn4+ activated red phosphors have relatively low emission energies (or long emission wavelengths) and are therefore inefficient for general lighting. Density functional calculations are performed to study Mn4+ emission in rare-earth hafnate, zirconate, and stannate pyrochlore oxides (RE2Hf2O7, RE2Zr2O7, and RE2Sn2O7). We show how the different sizes of the RE3+ cation in these pyrochlores affect the local structure of the distorted MnO6 octahedron, the Mn–O hybridization, and the Mn4+ emission energy. The Mn4+ emission energies of many pyrochlores are found to be higher than those currently known for Mn4+ doped oxides and should be closer to that of Y2O3:Eu3+ (the current commercial red phosphor for fluorescent lighting). The O–Mn–O bond angle distortion in a MnO6 octahedron is shown to play an important role in weakening Mn–O hybridization and consequently increasing the Mn4+ emission energy. Our result shows that searching for materials that allow significant O–Mn–O bond angle distortion in a MnO6 octahedron is an effective approach to find new Mn4+ activated red phosphors with potential to replace the relatively expensive Y2O3:Eu3+ phosphor.

  9. Level-resolved R-matrix calculations for the electron-impact excitation of Ne{sup 3+} and Ne{sup 6+}

    SciTech Connect (OSTI)

    Ludlow, J. A.; Lee, T. G.; Ballance, C. P.; Loch, S. D.; Pindzola, M. S.

    2011-08-15

    Large-scale R-matrix calculations are carried out for the electron-impact excitation of Ne{sup 3+} and Ne{sup 6+}. For Ne{sup 3+}, a 581-LSJ-level R-matrix intermediate coupling frame transformation calculation is made for excitations up to the n=4 shell. For some transitions, large effective collision strength differences are found with current 23-jKJ-level Breit-Pauli R-matrix and earlier 22-LSJ-level R-matrix jj omega (JAJOM) calculations. For Ne{sup 6+}, a 171-jKJ-level Breit-Pauli R-matrix calculation is made for excitations up to the n=5 shell. For some transitions, large effective collision strength differences are found with current 46-jKJ-level Breit-Pauli R-matrix and earlier 46-LSJ-level R-matrix JAJOM calculations. Together with existing R-matrix calculations for other ion stages, high-quality excitation data are now available for astrophysical and laboratory plasma modeling along the entire Ne isonuclear sequence.

  10. Electrochemical behavior of β-MnO{sub 2} and MnOOH nanorods in different electrolytes

    SciTech Connect (OSTI)

    Chinnasamy, Revathi; Thangavelu, Rajendrakumar Ramasamy

    2015-06-24

    A manganese dioxide (β-MnO{sub 2}) and MnOOH nanoparticles has been synthesized by hydrothermal method. As prepared samples are analyzed by X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). FESEM showed rod morphology within the diameter of 50–200 and length of few nanometers. These nanorods are immobilized on a Glassy Carbon Electrode (GCE) by drop cast method. The comparative electrochemical behavior of β-MnO{sub 2} and MnOOH rod modified GCE electrodes are analyzed by cyclic Voltammetry (CV) method in different electrolytes of 0.1M KCl, 0.1M Na{sub 2}SO{sub 4}, 0.1M NaOH, 0.1M PBS, 0.1M H{sub 2}SO{sub 4}. From the cyclic Voltammetry analysis found that in all the electrolytes both β-MnO{sub 2} and MnOOH modified GCE electrodes exhibit electrochemical behavior and KCl shows well redox properties as compared with others. There is also an observable difference in reduction potential value of both crystalline nanostructurers and concluded that β-MnO{sub 2} has high catalytic ability as compared with MnOOH rods.

  11. 2015 ANNUAL DOE-NE MATERIALS RESEARCH MEETING

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Reactor Materials element of the Nuclear Energy Enabling Technologies (NEET) program conducted its FY 2015 coordination meeting as a series of two web-conferences to act as a forum for the nuclear materials research community. The purpose of this meeting was to report on current and planned nuclear materials research, identify new areas of collaboration and promote greater coordination among the various Office of Nuclear Energy (NE) programs. Although each program has unique materials issues, there are opportunities to enhance coordination and collaboration. Other departmental programs such as the Offices of Science (Basic Energy Sciences and Fusion Energy), Energy Efficiency and Renewable Energy, Fossil Energy, and other agencies such as the National Aeronautics and Space Administration (NASA) also sponsor research in nuclear materials. Engagement with these organizations fosters new research partnerships, enhanced collaboration, and shared investment in research facilities. The presentations from this two part webinar series are available here. Data, images, and conclusions should be considered preliminary and should not be reproduced or reused without written permission of the authors.

  12. Geoffrey Mills Los Alamos National Laboratory For the MiniBooNE Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ICHEP Paris, France XXV Juillet, MMX New Observations from the MiniBooNE Experiment 1. Motivation 2. MiniBooNE Appearance Results 3. Comparison of LSND and MiniBooNE 4. Future Possibilities 5. Conclusions Neutrino Oscillations The oscillation patterns between the 3 known active neutrino species have been demonstrated by a number of experiments over the last two decades: SNO, Kamland Super-K, K2K, MINOS Armed with that knowledge, measurements of neutrino behavior outside the standard 3

  13. Geoffrey Mills Los Alamos National Laboratory For the MiniBooNE Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SLAC XXIV August MMX New Observations from the MiniBooNE Experiment 1. Motivation 2. MiniBooNE Appearance Results 3. Comparison of LSND and MiniBooNE 4. Future Possibilities 5. Conclusions Neutrino Oscillations " The oscillation patterns between the 3 known active neutrino species have been demonstrated by a number of experiments over the last two decades: " SNO, Kamland " Super-K, K2K, MINOS " Armed with that knowledge, measurements of neutrino behavior outside the standard

  14. Geoffrey Mills Los Alamos National Laboratory For the MiniBooNE Collaboration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NeuTel2011 Venezia, Italia Results from the MiniBooNE Experiment 1. Motivation 2. MiniBooNE Appearance Results 3. Comparison of LSND and MiniBooNE 4. Future Possibilities 5. Conclusions Mesdames et Mes Neutrino Oscillations " The oscillation patterns between the 3 known active neutrino species have been demonstrated by a number of experiments over the last two decades: " SNO, Kamland " Super-K, K2K, MINOS " Armed with that knowledge, measurements of neutrino behavior outside

  15. /Users/jzennamo/Desktop/ObsLimit_MiniSciBooNE_SBN_numuDis.pdf

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    µ θ 2 2 sin 3 - 10 2 - 10 1 - 10 1 ] 2 [eV 2 m ∆ 1 - 10 1 10 2 10 POT) 20 10 × POT) and T600 (6.6 21 10 × MicroBooNE (1.3 POT) 20 10 × LAr1-ND (6.6 mode, CC Events ν Stat, Flux, Cross Section Uncerts. Reconstructed Energy Efficiency µ ν 80% Shape and Rate 90% CL CL σ 3 CL σ 5 MiniBooNE + SciBooNE 90% CL

  16. MiniBooNE Anti-Neutrino CCQE Cross Section Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Anti-Neutrino Double-Differential Charged Current Quasi-Elastic Cross Section", arXiv:1301.7067 [hep-ex] The following MiniBooNE information from the anti-neutrino CCQE cross section paper is made available to the public: νμ CCQE data: MiniBooNE flux table of MiniBooNE anti-neutrino mode flux by neutrino species (Figure 1 and Tables XI-XII). Note that, based on the constraints of the in situ measurements, the muon neutrino flux spectrum given here should be scaled by 0.77. flux-integrated

  17. Presentation V: Joe Grange, University of Florida Experiments I: MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Presentation V: Joe Grange, University of Florida Experiments I: MiniBooNE West Wing (WH10W) 5:30 PM Thursday July 15 Refreshments at 5 PM Neutrino University (NeutU) is a series of informal, informative, and interactive presentations for summer students in the Fermilab Neutrino Program (Minerva, MiniBooNE, Minos, MicroBooNE, and Nova). These presentations are intended to introduce students to some of the important ideas and experiments of neutrino physics, particularly those that are running or

  18. File:USDA-CE-Production-GIFmaps-NE.pdf | Open Energy Information

    Open Energy Info (EERE)

    NE.pdf Jump to: navigation, search File File history File usage Nebraska Ethanol Plant Locations Size of this preview: 776 600 pixels. Full resolution (1,650 1,275 pixels,...

  19. MiniBooNE H. A. Tanaka Princeton University Neutrino Factory...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    H. A. Tanaka Princeton University Neutrino Factory 2004 Osaka, Japan The MiniBooNE ... J.L.Raaf University of Colorado: T.Hart, R.H.Nelson, M.Wilking, E.D.Zimmerman Columbia ...

  20. Application for Presidential Permit PP-400 TDI-NE - New England...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PP-400 TDI-NE - New England Clean Power Link Project - Motion to Intervene and Comments of the Vermont Department of Public Service - August 6, 2014 Application for Presidential ...

  1. REPLY TO ATTN OF: NE-24 L SUBJECT: Authorization to Conduct Remedial...

    Office of Legacy Management (LM)

    Government '--Department of Energy | memorandum 4 ' It) |1 e0i78 DATE: OCT 9 1984 REPLY TO ATTN OF: NE-24 L SUBJECT: Authorization to Conduct Remedial Action at Vicinity...

  2. Microsoft Word - MicroBooNE CD-2-3a appr.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Integration and commissioning of the detector components with liquid argon will be handled as operating R&D outside of the MicroBooNE Project; the R&D program will study the ...

  3. Microsoft Word - MicroBooNE CD-3b appr.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Integration and commissioning of the detector components with liquid argon will be handled as operating R&D outside of the MicroBooNE Project; the R&D program will study the ...

  4. MiniBooNE NC 1?0 Cross Section Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    0 production cross sections on mineral oil at EO(1 GeV)", arXiv:0911.2063 hep-ex, Phys. Rev. D81, 013005 (2010) The following MiniBooNE information from the 2009 NC 10...

  5. Fermilab | Newsroom | Press Releases | June 24, 2014: MicroBooNE...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    jpeg images. When using these images, please credit each photo as indicated. Med Res | Hi Res The 30-ton MicroBooNE neutrino detector was transported across the Fermilab site on...

  6. Inverse spin Hall effect in Pt/(Ga,Mn)As

    SciTech Connect (OSTI)

    Nakayama, H.; Chen, L.; Chang, H. W.; Ohno, H.; Matsukura, F.

    2015-06-01

    We investigate dc voltages under ferromagnetic resonance in a Pt/(Ga,Mn)As bilayer structure. A part of the observed dc voltage is shown to originate from the inverse spin Hall effect. The sign of the inverse spin Hall voltage is the same as that in Py/Pt bilayer structure, even though the stacking order of ferromagnetic and nonmagnetic layers is opposite to each other. The spin mixing conductance at the Pt/(Ga,Mn)As interface is determined to be of the order of 10{sup 19 }m{sup −2}, which is about ten times greater than that of (Ga,Mn)As/p-GaAs.

  7. Application for Presidential Permit OE Docket No. PP-400 TDI-NE - New

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    England Clean Power Link Project: Federal Register Notice, Volume 79, No. 131 - July 9, 2014 | Department of Energy - New England Clean Power Link Project: Federal Register Notice, Volume 79, No. 131 - July 9, 2014 Application for Presidential Permit OE Docket No. PP-400 TDI-NE - New England Clean Power Link Project: Federal Register Notice, Volume 79, No. 131 - July 9, 2014 Application from TDI-NE to construct, operate and maintain electric transmission facilities at the U.S. - Canada

  8. Introduction to MiniBooNE and Charged Current Quasi-Elastic (CCQE) Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MiniBooNE and ν μ Charged Current Quasi-Elastic (CCQE) Results Byron P. Roe University of Michigan For the MiniBooNE collaboration 2 University of Alabama Los Alamos National Laboratory Bucknell University Louisiana State University University of Cincinnati University of Michigan University of Colorado Princeton University Columbia University Saint Mary's University of Minnesota Embry Riddle University Virginia Polytechnic Institute Fermi National Accelerator Laboratory Western Illinois

  9. DOE - Office of Legacy Management -- Hallam Nuclear Power Facility - NE 01

    Office of Legacy Management (LM)

    Hallam Nuclear Power Facility - NE 01 FUSRAP Considered Sites Site: Hallam Nuclear Power Facility (NE.01 ) Designated Name: Alternate Name: Location: Evaluation Year: Site Operations: Site Disposition: Radioactive Materials Handled: Primary Radioactive Materials Handled: Radiological Survey(s): Site Status: Also see Hallam, Nebraska, Decommissioned Reactor Site Documents Related to Hallam Nuclear Power Facility U.S. Department of Energy 2009 Annual Inspection - Hallam, Nebraska June 2009 Page 1

  10. Princeton graduate student Imène Goumiri creates computer program that

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    helps stabilize fusion plasmas | Princeton Plasma Physics Lab Princeton graduate student Imène Goumiri creates computer program that helps stabilize fusion plasmas By John Greenwald and Raphael Rosen April 14, 2016 Tweet Widget Google Plus One Share on Facebook Imène Goumiri, a Princeton University graduate student, has worked with physicists at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) to simulate a method for limiting instabilities that reduce the

  11. WC_2000_001_CLASS_WAIVER_BETWEEN_DOE_and_EMPLOYEES_OF_THE_NE.pdf |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy 2000_001_CLASS_WAIVER_BETWEEN_DOE_and_EMPLOYEES_OF_THE_NE.pdf WC_2000_001_CLASS_WAIVER_BETWEEN_DOE_and_EMPLOYEES_OF_THE_NE.pdf (486.67 KB) More Documents & Publications Class_Waiver_W_C-2000-001.pdf WC_1994_010__CLASS_WAIVER_of_the_Governments_Patent_Rights_.pdf WC_1994_001_CLASS_WAIVER_OF_THE_Governments_Patent_Rights_i

  12. DOE - Office of Legacy Management -- Twin Cities Ammunition - MN 0-01

    Office of Legacy Management (LM)

    Twin Cities Ammunition - MN 0-01 FUSRAP Considered Sites Site: TWIN CITIES AMMUNITION (MN.0-01) Eliminated from further consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: None Location: New Brighton , Minnesota MN.0-01-1 Evaluation Year: 1987 MN.0-01-2 Site Operations: Site was formerly licensed under 10CFR 70 by the NRC. MN.0-01-1 MN.0-01-2 Site Disposition: Eliminated - No Authority - Referred to DOD MN.0-01-1 Radioactive Materials Handled: None

  13. References for HNF-SD-WM-TRD-007, ``System specification for the double-shell tank system: HNF-PROs, CFRs, DOE Orders, WACs``

    SciTech Connect (OSTI)

    Shaw, C.P.

    1998-07-30

    HNF-SD-WM-TRD-O07, System Specification for the Double-Shell Tank System, (hereafter referred to as DST Specification), defines the requirements of the double-shell tank system at the Hanford Site for Phase 1 privatization. Many of the sections in this document reference other documents for design guidance and requirements. Referenced documents include Project Hanford Management Contract (PHMC) procedures (HNF-PROS), Codes of Federal Regulation (CFRs), DOE Orders, and Washington Administrative Codes (WACs). This document provides rationale for the selection and inclusion of HNF-PROS, CFRs, DOE Orders and WACs.

  14. Antineutrino Neutral Current Interactions in MiniBooNE

    SciTech Connect (OSTI)

    Dharmapalan, Ranjan

    2012-01-01

    This dissertation reports the antineutrino-nucleus neutral current elastic scattering cross section on CH2 measured by the MiniBooNE experiment located in Batavia, IL. The data set consists of 60,605 events passing the selection cuts corresponding to 10.1×1020 POT, which represents the world’s largest sample of antineutrino neutral current elastic scattering events. The final sample is more than one order of magnitude lager that the previous antineutrino NCE scattering cross section measurement reported by the BNL E734 experiment. The measurement presented in this dissertation also spans a wider range in Q2, including the low-Q2 regime where the cross section rollover is clearly visible. A X2-based minimization was performed to determine the best value of the axial mass, MA and the Pauli blocking scaling function, that matches the antineutrino NCE scattering data. However, the best fit values of MA=1.29 GeV and K=1.026 still give a relatively poor X2, which suggests that the underlying nuclear model (based largely on the relativistic Fermi gas model) may not be an accurate representation for this particular interaction. Additionally, we present a measurement of the antineutrino/neutrino-nucleus NCE scattering cross section ratio. The neutrino mode NCE sample used in this study, corresponding to 6.4 × 1020 POT, is also the world’s largest sample (also by an order of magnitude). We have demonstrated that the ratio measurement is robust, as most of the correlated errors cancel, as expected. Furthermore, this ratio also proves to be rather insensitive to variations in the axial mass and the Pauli blocking parameter. This is the first time that this ratio has been experimentally reported. We believe this measurement will aid the theoretical physics community to test various model predictions of neutrino-nucleon/nucleus interactions.

  15. Magnetic domain tuning and the emergence of bubble domains in the bilayer manganite La<mn>2mn>->2mn>xSr<mn>1mn>+>2mn>xMn>2mn>O>7mn>(x=<mn>0.32mn>)

    SciTech Connect (OSTI)

    Jeong, Juyoung; Yang, Ilkyu; Yang, Jinho; Ayala-Valenzuela, Oscar E.; Wulferding, Dirk; Zhou, J. -S.; Goodenough, John B.; de Lozanne, Alex; Mitchell, J. F.; Leon, Neliza; Movshovich, Roman; Jeong, Yoon Hee; Yeom, Han Woong; Kim, Jeehoon

    2015-08-17

    Here, we report a magnetic force microscopy study of the magnetic domain evolution in the layered manganite La2–2xSr1+2xMn2O7 (with x = 0.32). This strongly correlated electron compound is known to exhibit a wide range of magnetic phases, including a recently uncovered biskyrmion phase. We observe a continuous transition from dendritic to stripelike domains, followed by the formation of magnetic bubbles due to a field- and temperature-dependent competition between in-plane and out-of-plane spin alignments. The magnetic bubble phase appears at comparable field and temperature ranges as the biskyrmion phase, suggesting a close relation between both phases. Based on our real-space images we construct a temperature-field phase diagram for this composition.

  16. CaMn2Al10: Itinerant Mn magnetism on the verge of magnetic order

    SciTech Connect (OSTI)

    Steinke, L.; Simonson, J. W.; Yin, W. -G.; Smith, G. J.; Kistner-Morris, J. J.; Zellman, S.; Puri, A.; Aronson, M. C.

    2015-07-24

    We report the discovery of CaMn2Al10, a metal with strong magnetic anisotropy and moderate electronic correlations. Magnetization measurements find a Curie-Weiss moment of 0.83μB/Mn, significantly reduced from the Hund's rule value, and the magnetic entropy obtained from specific heat measurements is correspondingly small, only ≈ 9% of Rln2. These results imply that the Mn magnetism is highly itinerant, a conclusion supported by density functional theory calculations that find strong Mn-Al hybridization. Consistent with the layered nature of the crystal structure, the magnetic susceptibility χ is anisotropic below 20 K, with a maximum ratio of χ[010][001] ≈ 3.5. A strong power-law divergence χ(T) ~ T–1.2 below 20 K implies incipient ferromagnetic order, an Arrott plot analysis of the magnetization suggests a vanishing low Curie temperature TC ~ 0. Our experiments indicate that CaMn2Al10 is a rare example of a system where the weak and itinerant Mn-based magnetism is poised on the verge of order.

  17. Beyond standard model searches in the MiniBooNE experiment

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Katori, Teppei; Conrad, Janet M.

    2014-08-05

    Tmore » he MiniBooNE experiment has contributed substantially to beyond standard model searches in the neutrino sector. he experiment was originally designed to test the Δm2~1eV2 region of the sterile neutrino hypothesis by observing νe(ν-e) charged current quasielastic signals from a νμ(ν-μ) beam. MiniBooNE observed excesses of νe and ν-e candidate events in neutrino and antineutrino mode, respectively. o date, these excesses have not been explained within the neutrino standard model (νSM); the standard model extended for three massive neutrinos. Confirmation is required by future experiments such as MicroBooNE. MiniBooNE also provided an opportunity for precision studies of Lorentz violation. he results set strict limits for the first time on several parameters of the standard-model extension, the generic formalism for considering Lorentz violation. Most recently, an extension to MiniBooNE running, with a beam tuned in beam-dump mode, is being performed to search for dark sector particles. In addition, this review describes these studies, demonstrating that short baseline neutrino experiments are rich environments in new physics searches.« less

  18. Strong enhancement of s -wave superconductivity near a quantum critical point of Ca<mn>3mn>Ir>4mn>Sn>13mn>

    SciTech Connect (OSTI)

    Biswas, P. K.; Guguchia, Z.; Khasanov, R.; Chinotti, M.; Li, L.; Wang, Kefeng; Petrovic, C.; Morenzoni, E.

    2015-11-11

    We report microscopic studies by muon spin rotation/relaxation as a function of pressure of the Ca<mn>3mn>Ir>4mn>Sn>13mn> and Sr3Ir4Sn13 system displaying superconductivity and a structural phase transition associated with the formation of a charge density wave (CDW). Our findings show a strong enhancement of the superfluid density and a dramatic increase of the pairing strength above a pressure of ≈ 1.6 GPa giving direct evidence of the presence of a quantum critical point separating a superconducting phase coexisting with CDW from a pure superconducting phase. The superconducting order parameter in both phases has the same s-wave symmetry. In spite of the conventional phonon-mediated BCS character of the weakly correlated (Ca1-xSrx)3Ir4Sn13 system the dependence of the effective superfluid density on the critical temperature puts this compound in the “Uemura” plot close to unconventional superconductors. This system exemplifies that conventional BCS superconductors in the presence of competing orders or multi-band structure can also display characteristics of unconventional superconductors.

  19. Application for Presidential Permit OE Docket No. PP-400 TDI- NE New England Clean Power Link Project

    Broader source: Energy.gov [DOE]

    Response to TDI - NE application from State Department to construct, operate, and maintain electric transmission facilities at the U.S. - Canada Border.

  20. Application for Presidential Permit OE Docket No. PP-400 TDI-NE New England Clean Power Link Project

    Broader source: Energy.gov [DOE]

    Response for TDI-NE from Department of Defense to construct, operate, and maintain electric transmission facilities at the U.S. - Canada Border.

  1. MicroBooNE Matthias Lüthi Universität Bern

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Status of MicroBooNE Matthias Lüthi Universität Bern Laboratorium für Hochenergiephysik 1 Friday 27 June 14 1. LSND and MiniBooNE Anomaly * 3-Neutrino Mixing is well determined * Still LSND & MiniBooNE regions remain 2 40 13. Neutrino mixing Cl 95% Ga 95% ν µ ↔ν τ ν e ↔ν X 10 0 10 -3 ∆m 2 [eV 2 ] 10 -12 10 -9 10 -6 10 2 10 0 10 -2 10 -4 tan 2 θ C H O O Z B u g e y C H O R U S NOMAD CHORUS KARMEN2 ν e ↔ν τ N O M A D ν e ↔ν µ CDHSW N O M A D KamLAND 95% SNO 95%

  2. Numerical Analysis of Parasitic Crossing Compensation with Wires in DA$\\Phi$NE

    SciTech Connect (OSTI)

    Valishev, A.; Shatilov, D.; Milardi, C.; Zobov, M.

    2015-06-24

    Current-bearing wire compensators were successfully used in the 2005-2006 run of the DAΦNE collider to mitigate the detrimental effects of parasitic beam-beam interactions. A marked improvement of the positron beam lifetime was observed in machine operation with the KLOE detector. In view of the possible application of wire beam-beam compensators for the High Luminosity LHC upgrade, we revisit the DAΦNE experiments. We use an improved model of the accelerator with the goal to validate the modern simulation tools and provide valuable input for the LHC upgrade project.

  3. ARM - Field Campaign - 1996 NARSTO Northeast Field Study (NARSTO-NE)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    6 NARSTO Northeast Field Study (NARSTO-NE) ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : 1996 NARSTO Northeast Field Study (NARSTO-NE) 1996.07.01 - 1996.07.28 Lead Scientist : Larry Kleinman For data sets, see below. Abstract The DOE G-1 aircraft was deployed in the New York City metropolitan area as part of the North American Research Strategy for Tropospheric Ozone-Northeast effort to determine the

  4. ARM - Field Campaign - 2001 Philadelphia NE-OPS Air Quality Experiment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Philadelphia NE-OPS Air Quality Experiment ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : 2001 Philadelphia NE-OPS Air Quality Experiment 2001.07.14 - 2001.07.30 Lead Scientist : C Philbrick For data sets, see below. Abstract BNL to field and operate the chemical gas analyzers (specifically the NO, NO2, NOy, NOy*, O3, SO2, CO and PILS instruments) to collect 15-s, 60-s, 15-min, and 1-h data from the BNL

  5. Microsoft PowerPoint - Oxford_MiniBooNE_and_SterileNus.ppt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Oxford Seminar June 23, 2004 * Extensions to the Neutrino Standard Model: Sterile Neutrinos * MiniBooNE: Status and Prospects * Future Directions if MiniBooNE Sees Oscillations 2 Theoretical Prejudices before 1995 * Natural scale for ∆m 2 ~ 10 - 100 eV 2 since needed to explain dark matter * Oscillation mixing angles must be small like the quark mixing angles * Solar neutrino oscillations must be small mixing angle MSW solution because it is "cool" * Atmospheric neutrino anomaly must

  6. MiniBooNE Charged Current Charged Pion Cross Section Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Muon Neutrino-Induced Charged-Current Charged Pion Production Cross Sections on Mineral Oil at Enu~1 GeV", arXiv:1011.3572 [hep-ex], submitted to Phys. Rev. D. The following MiniBooNE information for the 2010 CC π+ cross section paper is made available to the public. Tables A root file containing histograms of all of the cross section results in the paper can be found here. A text file of the cross section results can be found here. The MiniBooNE muon neutrino flux distribution can be

  7. MiniBooNE Neutral Current Elastic Cross Section Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the Neutrino Neutral-Current Elastic Differential Cross Section",arXiv:1007.4730 [hep-ex], Phys. Rev. D82, 092005 (2010) The following MiniBooNE information for the 2010 neutral current elastic cross section paper is made available to the public. MiniBooNE neutral current elastic cross-section results in the "paper" are reported in the true energy after the unsmearing of detector resolution and efficiency effects. In addition, here we present alternative results in the

  8. MiniBooNE as related to Windows on the Universe

    SciTech Connect (OSTI)

    Stefanski, Ray; /Fermilab

    2009-12-01

    The measurement of absolute neutrino and anti-neutrino cross-sections, the observation of a 'low energy anomaly' in the neutrino sector, the constraints placed on the LSND effect by a non-observation of neutrino oscillations, the search for neutrino and anti-neutrino appearance, and for the possible existence of new heavy particles makes MiniBooNE a major contributor to the current view of the Universe. This paper addresses specific model constraints set by the MiniBooNE data, and explores expectations for further remaining analysis of the data.

  9. Mn-Fe base and Mn-Cr-Fe base austenitic alloys

    DOE Patents [OSTI]

    Brager, Howard R.; Garner, Francis A.

    1987-01-01

    Manganese-iron base and manganese-chromium-iron base austenitic alloys designed to have resistance to neutron irradiation induced swelling and low activation have the following compositions (in weight percent): 20 to 40 Mn; up to about 15 Cr; about 0.4 to about 3.0 Si; an austenite stabilizing element selected from C and N, alone or in combination with each other, and in an amount effective to substantially stabilize the austenite phase, but less than about 0.7 C, and less than about 0.3 N; up to about 2.5 V; up to about 0.1 P; up to about 0.01 B; up to about 3.0 Al; up to about 0.5 Ni; up to about 2.0 W; up to about 1.0 Ti; up to about 1.0 Ta; and with the remainder of the alloy being essentially iron.

  10. Structure and magnetic properties of LnMnSbO ( Ln=La and Ce)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhang, Qiang; Kumar, C. M. N.; Tian, Wei; Dennis, Kevin W.; Goldman, Alan I.; Vaknin, David

    2016-03-11

    Here, a neutron powder diffraction (NPD) study of LnMnSbO (Ln = La or Ce) reveals differences between the magnetic ground state of the two compounds due to the strong Ce-Mn coupling compared to La-Mn. The two compounds adopt the P4/nmm space group down to 2 K, and whereas magnetization measurements do not show obvious anomaly at high temperatures, NPD reveals a C-type antiferromagnetic (AFM) order below TN = 255K for LaMnSbO and 240 K for CeMnSbO. While the magnetic structure of LaMnSbO is preserved to base temperature, a sharp transition at TSR = 4.5K is observed in CeMnSbO due tomore » a spin-reorientation (SR) transition of the Mn2+ magnetic moments from pointing along the c axis to the ab plane. The SR transition in CeMnSbO is accompanied by a simultaneous long-range AFM ordering of the Ce moments, which indicates that the Mn SR transition is driven by the Ce-Mn coupling. The ordered moments are found to be somewhat smaller than those expected for Mn2+ (S = 5/2) in insulators, but large enough to suggest that these compounds belong to the class of local-moment antiferromagnets. The lower TN found in these two compounds compared to the As-based counterparts (TN = 317 for LaMnAsO, TN = 347K for CeMnAsO) indicates that the Mn-Pn (Pn=As or Sb) hybridization that mediates the superexchange Mn-Pn-Mn coupling is weaker for the Sb-based compounds.« less

  11. Revealing the Restructured Surface of Li[Mn2]O4

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Amos, Charles D.; Roldan, Manuel A.; Varela, Maria; Goodenough, John B.; Ferreira, Paulo J.

    2016-03-29

    The spinel Revealing the Restructured Surface of Li[Mn2]O4 is a candidate cathode for a Li-ion battery, but its capacity fades over a charge/discharge cycle of Li1–x[Mn2]O4 (0 < x < 1) that is associated with a loss of Mn to the organic-liquid electrolyte. It is known that the disproportionation reaction 2Mn3+ = Mn2+ + Mn4+ occurs at the surface of a Mn spinel, and it is important to understand the atomic structure and composition of the surface of Revealing the Restructured Surface of Li[Mn2]O4 in order to understand how Mn loss occurs. We report a study of the surface reconstructionmore » of Revealing the Restructured Surface of Li[Mn2]O4 by aberration-corrected scanning transmission electron microscopy. The atomic structure coupled with Mn-valence and the distribution of the atomic ratio of oxygen obtained by electron energy loss spectroscopy reveals a thin, stable surface layer of Mn3O4, a subsurface region of Li1+x[Mn2]O4 with retention of bulk Li[Mn2]O4. We conclude that this observation is compatible with the disproportionation reaction coupled with oxygen deficiency and a displacement of surface Li+ from the Mn3O4 surface phase. These results provide a critical step toward understanding how Mn is lost from Li[Mn2]O4, once inside a battery.« less

  12. Synthesis, characterization and electrochemical performance of Al-substituted Li₂MnO₃

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Dhital, Chetan; Huq, Ashfia; Paranthaman, Mariappan Parans; Manivannan, Ayyakkannu; Torres-Castro, Loraine; Shojan, Jifi; Julien, Christian M.; Katiyar, Ram S.

    2015-08-08

    Li2MnO3 is known to be electrochemically inactive due to Mn in tetravalent oxidation state. Several compositions such as Li2MnO3 , Li1.5Al0.17MnO3, Li1.0Al0.33MnO3 and Li0.5Al0.5MnO3 were synthesized by a sol–gel Pechini method. All the samples were characterized with x-ray diffraction, Raman, x-ray photoelectron spectroscopy, scanning electron microscopy, Tap density and BET analyzer. X-ray diffraction patterns indicated the presence of monoclinic phase for pristine Li2MnO3and mixed monoclinic/spinel phases (Li2 - xMn1 - yAlx + yO3 + z) for Al-substituted Li2MnO3compounds. The Al substitution seems to occur both at Li and Mn sites, which could explain the presence of spinel phase. X-ray photoelectronmore » spectroscopy for Mn 2p orbital reveals a significant decrease in binding energy for Li1.0Al0.33MnO3 and Li0.5Al0.5MnO3 compounds. Cyclic voltammetry, charge/discharge cycles and electrochemical impedance spectroscopy were also performed. A discharge capacity of 24 mAh g-1 for Li2MnO3, 68 mAh g-1 for Li1.5Al0.17MnO3, 58 mAh g-1 for Li1.0Al0.33MnO3 and 74 mAh g-1 for Li0.5Al0.5MnO3 were obtained. As a result, aluminum substitutions increased the formation of spinel phase which is responsible for cycling.« less

  13. NA SD 452.2

    National Nuclear Security Administration (NNSA)

    ... Non-NES deficiencies and problems in NEOs that are outside the scope of the ... cabinets, materials requirements planning terminal, and emergency wash. (g) General use handling and ...

  14. Resonant spin tunneling in randomly oriented nanospheres of Mn?? acetate

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lendinez, S.; Billinge, S. J. L.; Zarzuela, R.; Tejada, J.; Terban, M. W.; Espin, J.; Imaz, I.; Maspoch, D.; Chudnovsky, E. M.

    2015-01-06

    We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn?? acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for the Mn?? acetate crystal in the field parallel to the easy axis.Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for amoresingle crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn?? acetate. Our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.less

  15. Stress induced anisotropy in CoFeMn soft magnetic nanocomposites...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Stress induced anisotropy in CoFeMn soft magnetic nanocomposites Citation Details In-Document Search Title: Stress induced anisotropy in CoFeMn soft magnetic ...

  16. Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance

    SciTech Connect (OSTI)

    Dai, Qilin; Wang, Wenyong E-mail: jtang2@uwyo.edu; Tang, Jinke E-mail: jtang2@uwyo.edu; Sabio, Erwin M.

    2014-05-05

    In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn{sub 2}SnO{sub 4} photoanodes by pulsed laser deposition and (2) improved device performance of quantum dot sensitized solar cells of the Mn doped QDs (CdSe:Mn) compared to the undoped QDs (CdSe). The band diagram of photoanode Zn{sub 2}SnO{sub 4} and sensitizer CdSe:Mn QD is proposed based on the incident-photon-to-electron conversion efficiency (IPCE) data. Mn-modified band structure leads to absorption at longer wavelengths than the undoped CdSe QDs, which is due to the exchange splitting of the CdSe:Mn conduction band by the Mn dopant. Three-fold increase in the IPCE efficiency has also been observed for the Mn doped samples.

  17. Pulsed laser deposition of Mn doped CdSe quantum dots for improved...

    Office of Scientific and Technical Information (OSTI)

    Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance Citation Details In-Document Search Title: Pulsed laser deposition of Mn doped CdSe ...

  18. Coexistence of charge-density wave and ferromagnetism in Ni2MnGa...

    Office of Scientific and Technical Information (OSTI)

    Coexistence of charge-density wave and ferromagnetism in Ni2MnGa Citation Details In-Document Search Title: Coexistence of charge-density wave and ferromagnetism in Ni2MnGa ...

  19. Simulation of Crab Waist Collisions In DA$\\Phi$NE With KLOE-2 Interaction Region

    SciTech Connect (OSTI)

    Zobov, M.; Drago, A.; Gallo, A.; Milardi, C.; Shatilov, D.; Valishev, A.

    2015-06-24

    After the successful completion of the SIDDHARTA experiment run with crab waist collisions, the electron-positron collider DAΦNE has started routine operations for the KLOE-2 detector. The new interaction region also exploits the crab waist collision scheme, but features certain complications including the experimental detector solenoid, compensating anti-solenoids, and tilted quadrupole magnets. We have performed simulations of the beam-beam collisions in the collider taking into account the real DAΦNE nonlinear lattice. In particular, we have evaluated the effect of crab waist sextupoles and beam-beam interactions on the DAΦNE dynamical aperture and energy acceptance, and estimated the luminosity that can be potentially achieved with and without crab waist sextupoles in the present working conditions. A numerical analysis has been performed in order to propose possible steps for further luminosity increase in DAΦNE such as a better working point choice, crab sextupole strength optimization, correction of the phase advance between the sextupoles and the interaction region. The proposed change of the e- ring working point was implemented and resulted in a significant performance increase.

  20. Mixing antiferromagnets to tune NiFe-[IrMn/FeMn] interfacial spin-glasses, grains thermal stability, and related exchange bias properties

    SciTech Connect (OSTI)

    Akmaldinov, K.; Ducruet, C.; Portemont, C.; Joumard, I.; Prejbeanu, I. L.; Dieny, B.; Baltz, V.

    2014-05-07

    Spintronics devices and in particular thermally assisted magnetic random access memories require a wide range of ferromagnetic/antiferromagnetic (F/AF) exchange bias (EB) properties and subsequently of AF materials to fulfil diverse functionality requirements for the reference and storage. For the reference layer, large EB energies and high blocking temperature (T{sub B}) are required. In contrast, for the storage layer, mostly moderate T{sub B} are needed. One of the present issues is to find a storage layer with properties intermediate between those of IrMn and FeMn and in particular: (i) with a T{sub B} larger than FeMn for better stability at rest-T but lower than IrMn to reduce power consumption at write-T and (ii) with improved magnetic interfacial quality, i.e., with reduced interfacial glassy character for lower properties dispersions. To address this issue, the EB properties of F/AF based stacks were studied for various mixed [IrMn/FeMn] AFs. In addition to EB loop shifts, the F/AF magnetic interfacial qualities and the AF grains thermal stability are probed via measurements of the low- and high-temperature contributions to the T{sub B} distributions, respectively. A tuning of the above three parameters is observed when evolving from IrMn to FeMn via [IrMn/FeMn] repetitions.

  1. Epitaxial Growth of Intermetallic MnPt Films on Oxides and Large Exchange Bias

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Liu, Zhiqi; Biegalski, Michael D.; Hsu, Shang-Lin; Shang, Shunli; Marker, Cassie; Liu, Jian; Li, Li; Fan, Lisha S.; Meyer, Tricia L.; Wong, Anthony T.; et al

    2015-11-05

    High-quality epitaxial growth of intermetallic MnPt films on oxides is achieved, with potential for multiferroic heterostructure applications. Antisite-stabilized spin-flipping induces ferromagnetism in MnPt films, although it is robustly antiferromagnetic in bulk. Moreover, highly ordered antiferromagnetic MnPt films exhibit superiorly large exchange coupling with a ferromagnetic layer.

  2. Epitaxial growth of intermetallic MnPt films on oxides and large exchange bias

    SciTech Connect (OSTI)

    Liu, Zhiqi; Biegalski, Michael D.; Hsu, Shang-Lin; Shang, Shunli; Marker, Cassie; Liu, Jian; Li, Li; Fan, Lisha S.; Meyer, Tricia L.; Wong, Anthony T.; Nichols, John A.; Chen, Deyang; You, Long; Chen, Zuhuang; Wang, Kai; Wang, Kevin; Ward, Thomas Z.; Gai, Zheng; Lee, Ho Nyung; Sefat, Athena S.; Lauter, Valeria; Liu, Zi-kui; Christen, Hans M.

    2015-11-05

    High-quality epitaxial growth of intermetallic MnPt films on oxides is achieved, with potential for multiferroic heterostructure applications. Antisite-stabilized spin-flipping induces ferromagnetism in MnPt films, although it is robustly antiferromagnetic in bulk. Thus, highly ordered antiferromagnetic MnPt films exhibit superiorly large exchange coupling with a ferromagnetic layer.

  3. Construction integrity assessment report (ETN-98-0005) S-Farm overground transfer (OGT) system valve pit 241-S-B to valve pit 241-S-D

    SciTech Connect (OSTI)

    HICKS, D.F.

    1999-08-12

    The S-Farm overground transfer (OGT) line will bypass the existing line(s), between valve pits 241-S-B and 241-S-D that no longer meet system requirements. The new OGT line will provide a waste transfer pipeline between these valve pits in support of saltwell pumping activities. The length of the OGT line is approximately 180 ft from pit to pit. The primary pipe is nominal 1-in. diameter stainless steel (SST) braided Ethylene-propylene Diene Monomer (EPDM) hose. The encasement pipe is a nominal 3-in., flanged, SST pipe made up of several different length pipe spool pieces (drawing H-2-829564, sh. 1 and sh. 2). The OGT line slopes from valve pit 241-S-B toward valve pit 241-S-D. At each end, the primary and encasement pipe connect to a pit entry spool piece. The pit entry spool pieces are constructed of prefabricated SST materials. These spool pieces allow for the separation of the primary and encasement pipelines after the pipes have entered the valve pits (drawing H-2-818280, sh. 2). The pit entry spool pieces also allow for leak detection of the encasement pipe at each end (drawing H-2-829564, sh. 2). The OGT encasement pipeline is supported above ground by adjustable height unistrut brackets and precast concrete bases (drawing H-2-829654, sh. 1). The pipeline is heat-traced and insulated. The heat tracing and insulation supply and retain latent heat that prevents waste solidification during transfers and provides freeze protection. The total length of the pipeline is above ground, thereby negating the need for cathodic corrosion protection. This Construction Integrity Assessment Report (CIAR) is prepared by Fluor Daniel Northwest for Numatec Hanford Corporation/Lockheed Martin Hanford Corporation, the operations contractor, and the U. S. Department of Energy, the system owner. The CIAR is intended to verify that construction was performed in accordance with the provisions of Washington Administrative Code, WAC-173-303-640 (3) (c), (e), (f) and (h).

  4. Cationic disorder and Mn{sup 3+}/Mn{sup 4+} charge ordering in the B? and B? sites of Ca{sub 3}Mn{sub 2}NbO{sub 9} perovskite: a comparison with Ca{sub 3}Mn{sub 2}WO{sub 9}

    SciTech Connect (OSTI)

    Lpez, C.A.; Saleta, M.E.; Pedregosa, J.C.; Snchez, R.D.; Alonso, J.A.; and others

    2014-02-15

    We describe the preparation, crystal structure determination, magnetic and transport properties of two novel Mn-containing perovskites, with a different electronic configuration for Mn atoms located in B site. Ca{sub 3}Mn{sup 3+}{sub 2}WO{sub 9} and Ca{sub 3}Mn{sup 3+/4+}{sub 2}NbO{sub 9} were synthesized by standard ceramic procedures; the crystallographic structure was studied from X-ray powder diffraction (XRPD) and neutron powder diffraction (NPD). Both phases exhibit a monoclinic symmetry (S.G.: P2{sub 1}/n); Ca{sub 3}Mn{sub 2}WO{sub 9} presents a long-range ordering over the B sites, whereas Ca{sub 3}Mn{sub 2}NbO{sub 9} is strongly disordered. By in-situ NPD, the temperature evolution of the structure study presents an interesting evolution in the octahedral size (?MnO?) for Ca{sub 3}Mn{sub 2}NbO{sub 9}, driven by a charge ordering effect between Mn{sup 3+} and Mn{sup 4+} atoms, related to the anomaly observed in the transport measurements at T?160 K. Both materials present a magnetic order below T{sub C}=30 K and 40 K for W and Nb materials, respectively. The magneto-transport measurements display non-negligible magnetoresistance properties in the paramagnetic regime. - Graphical abstract: Comparison between the octahedron size and the magnetic behaviour for Ca{sub 3}Mn{sub 2}NbO{sub 9} in the temperature region where the charge and magnetic order occur. Display Omitted - Highlights: Two novel Mn-containing double perovskites were obtained by solid-state reactions. Both double perovskites are monoclinic (P2{sub 1}/n) determined by XRPD and NPD. Ca{sub 3}Mn{sub 2}WO{sub 9} contains Mn{sup 3+} while Ca{sub 3}Mn{sub 2}NbO{sub 9} includes mixed-valence cations Mn{sup 3+}/Mn{sup 4+}. Ca{sub 3}Mn{sub 2}NbO{sub 9} presents a charge-ordering effect between Mn{sup 3+} and Mn{sup 4+} evidenced by NPD. The magnetic and transport studies evidenced the charge ordering in Ca{sub 3}Mn{sub 2}NbO{sub 9}.

  5. Neutron scattering study of spin ordering and stripe pinning in superconducting La<mn>1.93mn>Sr>0.07mn>CuO>4mn>

    SciTech Connect (OSTI)

    Jacobsen, H.; Zaliznyak, I. A.; Savici, A. T.; Winn, B. L.; Chang, S.; Hücker, M.; Gu, G. D.; Tranquada, J. M.

    2015-11-20

    The relationships among charge order, spin fluctuations, and superconductivity in underdoped cuprates remain controversial. We use neutron scattering techniques to study these phenomena in La<mn>1.93mn>Sr>0.07mn>CuO>4mn> a superconductor with a transition temperature of Tc = 20 K. At T<< Tc, we find incommensurate spin fluctuations with a quasielastic energy spectrum and no sign of a gap within the energy range from 0.2 to 15 meV. A weak elastic magnetic component grows below ~ 10 K, consistent with results from local probes. Regarding the atomic lattice, we have discovered unexpectedly strong fluctuations of the CuO6 octahedra about Cu-O bonds, which are associated with inequivalent O sites within the CuO2 planes. Moreover, we observed a weak elastic (3 30) superlattice peak that implies a reduced lattice symmetry. The presence of inequivalent O sites rationalizes various pieces of evidence for charge stripe order in underdoped La2-xSrxCuO4. The coexistence of superconductivity with quasi-static spin-stripe order suggests the presence of intertwined orders; however, the rotation of the stripe orientation away from the Cu-O bonds might be connected with evidence for a finite gap at the nodal points of the superconducting gap function.

  6. Clarification of enhanced ferromagnetism in Be-codoped InMnP fabricated using Mn/InP:Be bilayers grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Shon, Yoon; Lee, Sejoon; Taek Yoon, Im; Jeon, H. C.; Lee, D. J.; Kang, T. W.; Song, J. D.; Yoon, Chong S.; Kim, D. Y.; Park, C. S.

    2011-11-07

    The p-type InMnP:Be epilayers were prepared by the sequential growth of Mn/InP:Be bilayers using molecular-beam-epitaxy and the subsequent in-situ annealing at 200-300 deg. C. In triple-axis x-ray diffraction patterns, the samples revealed a shoulder peak indicative of intrinsic InMnP. The ferromagnetic transition in InMnP:Be was observed to occur at the elevated temperature of {approx}140 K, and the ferromagnetic spin-domains clearly appeared in magnetic force microscopy images. The improved ferromagnetic properties are attributed to the increased p-d hybridation due to high p-type conductivity of InMnP:Be (p {approx} 10{sup 20 }cm{sup -3}). The results suggest that enhanced ferromagnetism can be effectively obtained from Be-codoped InMnP.

  7. Magnetic properties of α−MnO{sub 2} and Co-doped α−MnO{sub 2} nanowires

    SciTech Connect (OSTI)

    Stella, C. Soundararajan, N. Ramachandran, K.

    2014-04-24

    α−MnO{sub 2} and Co-doped α−MnO{sub 2} nanowires (NWs) were synthesized by hydrothermal method. The structural characterization by XRD revealed the tetragonal structure of α−MnO{sub 2}. The formation of one dimensional (1D) NWs of pure and Co-doped α−MnO{sub 2} was confirmed from SEM. From UV-Vis absorption spectra, it is found that both pure and Co-doped α−MnO{sub 2} NWs showed blue shift compared to bulk, which revealed the quantum confinement in the synthesized samples. The magnetic properties were analyzed by VSM, which suggest that pure and doped α−MnO{sub 2} exhibit ferromagnetic behavior at room temperature (RT)

  8. A Combination of CDF and D0 limits on the branching ratio of B0(s)(d) ---> mu+ mu- decays

    SciTech Connect (OSTI)

    Bernhard, R.; Glenzinski, D.; Herndon, M.; Kamon, T.; Krutelyov, V.; Landsberg, G.; Lehner, F.; Lin, C.J.; Mrenna, S.; /Zurich U. /Fermilab /Wisconsin U., Madison /Texas A-M /Brown U.

    2005-08-01

    The authors combine the results of CDF and D0 searches for the rare decays B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} and B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -}. The experiments use 364 pb{sup -1} and 300 pb{sup -1} of data respectively. The limits on the branching ratios are obtained by normalizing the estimated sensitivity to the decay B{sup +} {yields} J/{psi}K{sup +} taking into account the fragmentation ratios f{sub u}/f{sub s(d)}. The combined results exclude branching ratios of BR(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) > 1.5 x 10{sup -7} and BR(B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) > 4.0 x 10{sup -8} at 95% confidence level. These are the most stringent limits on these decays at the present time.

  9. Role of t{sub 2g} electrons in Mn-Tb coupling of multiferroic TbMnO{sub 3}

    SciTech Connect (OSTI)

    Guo, Y. Y.; Wang, Y. L.; Liu, J.-M.; Wei, T.

    2014-08-14

    We investigate the effect of Cr-doping in polycrystalline TbMn{sub 1?x}Cr{sub x}O{sub 3} (x???6%) ceramics on the magnetism, ferroelectricity, and dielectricity. The Cr substitution gradually suppresses the ferroelectricity induced by the Mn spiral spin ordering, and results in a stronger modulation of polarization by magnetic field with increasing x. However, the transition temperature T{sub Tb} corresponding to onset of Tb magnetic ordering has barely shifted with Cr doping. In other words, although the Cr-doping obviously disrupts the Mn spiral spin ordering, the exchange field J{sub Mn-Tb} acting on the Tb moments from the Mn-spin structure is hardly impacted. Our work demonstrates that the e{sub g} electron of Mn{sup 3+} plays an important role in forming the Mn spiral spin order, but the f-d exchange interaction between the Mn 3d spins and the Tb 4f moments in multiferroic TbMnO{sub 3} almost involves only the t{sub 2g} electrons.

  10. Effect of Mn substitution on the transport properties of co-sputtered Fe{sub 3−x}Mn{sub x}Si epilayers

    SciTech Connect (OSTI)

    Tang, M.; Jin, C.; Bai, H. L.

    2014-11-07

    Motivated by the theoretical calculations that Fe{sub 3−x}Mn{sub x}Si can simultaneously exhibit a high spin polarization with a high Curie temperature to be applied in spintronic devices, and in order to further study the effect of Mn contents on the physical properties of Fe{sub 3−x}Mn{sub x}Si, we have investigated the effect of Mn substitution on the transport properties of epitaxial Fe{sub 3−x}Mn{sub x}Si (0≤x≤1) films systematically. The Fe{sub 3−x}Mn{sub x}Si films were epitaxially grown on MgO(001) plane with 45° rotation. The magnetization for various x shows enhanced irreversibility, implying the antiferromagnetic ordering induced by the substitution of Mn. A metal-semiconductor crossover was observed due to the enhanced disorders of interactions and the local lowering of symmetry induced by the substitution of Mn. The single-domain state in the Fe{sub 3−x}Mn{sub x}Si films leads to twofold symmetric curves of the anisotropic magnetoresistance and planar Hall resistivity.

  11. Strategic Plan for Nuclear Energy -- Knowledge Base for Advanced Modeling and Simulation (NE-KAMS)

    SciTech Connect (OSTI)

    Kimberlyn C. Mousseau

    2011-10-01

    The Nuclear Energy Computational Fluid Dynamics Advanced Modeling and Simulation (NE-CAMS) system is being developed at the Idaho National Laboratory (INL) in collaboration with Bettis Laboratory, Sandia National Laboratory (SNL), Argonne National Laboratory (ANL), Utah State University (USU), and other interested parties with the objective of developing and implementing a comprehensive and readily accessible data and information management system for computational fluid dynamics (CFD) verification and validation (V&V) in support of nuclear energy systems design and safety analysis. The two key objectives of the NE-CAMS effort are to identify, collect, assess, store and maintain high resolution and high quality experimental data and related expert knowledge (metadata) for use in CFD V&V assessments specific to the nuclear energy field and to establish a working relationship with the U.S. Nuclear Regulatory Commission (NRC) to develop a CFD V&V database, including benchmark cases, that addresses and supports the associated NRC regulations and policies on the use of CFD analysis. In particular, the NE-CAMS system will support the Department of Energy Office of Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program, which aims to develop and deploy advanced modeling and simulation methods and computational tools for reliable numerical simulation of nuclear reactor systems for design and safety analysis. Primary NE-CAMS Elements There are four primary elements of the NE-CAMS knowledge base designed to support computer modeling and simulation in the nuclear energy arena as listed below. Element 1. The database will contain experimental data that can be used for CFD validation that is relevant to nuclear reactor and plant processes, particularly those important to the nuclear industry and the NRC. Element 2. Qualification standards for data evaluation and classification will be incorporated and applied such that validation data sets will result in well

  12. Plutonium Oxidation and Subsequent Reduction by Mn (IV) Minerals

    SciTech Connect (OSTI)

    KAPLAN, DANIEL

    2005-09-13

    Plutonium sorbed to rock tuff was preferentially associated with manganese oxides. On tuff and synthetic pyrolusite (Mn{sup IV}O{sub 2}), Pu(IV) or Pu(V) was initially oxidized, but over time Pu(IV) became the predominant oxidation state of sorbed Pu. Reduction of Pu(V/VI), even on non-oxidizing surfaces, is proposed to result from a lower Gibbs free energy of the hydrolyzed Pu(IV) surface species versus that of the Pu(V) or Pu(VI) surface species. This work suggests that despite initial oxidation of sorbed Pu by oxidizing surfaces to more soluble forms, the less mobile form of Pu, Pu(IV), will dominate Pu solid phase speciation during long term geologic storage. The safe design of a radioactive waste or spent nuclear fuel geologic repository requires a risk assessment of radionuclides that may potentially be released into the surrounding environment. Geochemical knowledge of the radionuclide and the surrounding environment is required for predicting subsurface fate and transport. Although difficult even in simple systems, this task grows increasingly complicated for constituents, like Pu, that exhibit complex environmental chemistries. The environmental behavior of Pu can be influenced by complexation, precipitation, adsorption, colloid formation, and oxidation/reduction (redox) reactions (1-3). To predict the environmental mobility of Pu, the most important of these factors is Pu oxidation state. This is because Pu(IV) is generally 2 to 3 orders of magnitude less mobile than Pu(V) in most environments (4). Further complicating matters, Pu commonly exists simultaneously in several oxidation states (5, 6). Choppin (7) reported Pu may exist as Pu(IV), Pu(V), or Pu(VI) oxic natural groundwaters. It is generally accepted that plutonium associated with suspended particulate matter is predominantly Pu(IV) (8-10), whereas Pu in the aqueous phase is predominantly Pu(V) (2, 11-13). The influence of the character of Mn-containing minerals expected to be found in subsurface

  13. Relation between the magnetization and the electrical properties of alloy GaSb-MnSb films

    SciTech Connect (OSTI)

    Koplak, O. V.; Polyakov, A. A.; Davydov, A. B.; Morgunov, R. B.; Talantsev, A. D.; Kochura, A. V.; Fedorchenko, I. V.; Novodvorskii, O. A.; Parshina, L. S.; Khramova, O. D.; Shorokhova, A. V.; Aronzon, B. A.

    2015-06-15

    The influence of the charge carrier concentration on the magnetic properties of GaSb-MnSb alloys is studied. The ferromagnetism of GaSb-MnSb films is caused by the presence of MnSb granules and manifests itself in both magnetometric measurements and the presence of an anisotropic magnetoresistance and the anomalous Hall effect. Electric conduction is executed by charge carriers (holes) in a GaSb matrix. The magnetization of clusters depends on stoichiometry and the concentration of Mn{sup 2+} and Mn{sup 3+} ions, which is specified by the film growth conditions. At high film growth temperatures, ferromagnetic clusters containing Mn{sup 2+} ions mainly form. At low growth temperatures, an antiferromagnetic phase containing Mn{sup 3+} ions forms.

  14. Effect of Composition and Heat Treatment on MnBi Magnetic Materials

    SciTech Connect (OSTI)

    Cui, Jun; Choi, Jung-Pyung; Polikarpov, Evgueni; Bowden, Mark E.; Xie, Wei; Li, Guosheng; Nie, Zimin; Zarkevich, Nikolai; Kramer, Matthew J.; Johnson, Duane D.

    2014-08-17

    The metallic compound MnBi is a promising rare-earth-free permanent magnet material. Compare to other rare-earth-free candidates, MnBi stands out for its high intrinsic coercivity (Hci) and its large positive temperature coefficient. Several groups have demonstrated that the Hci of MnBi compound in thin film or in powder form can exceed 12 kOe and 26 kOe at 300 K and 523 K, respectively. Such steep increase in Hci with increasing temperature is unique to MnBi. Consequently, MnBi is a highly sought-after hard phase for exchange coupling nanocomposite magnets. The reaction between Mn and Bi is peritectic, so Mn tends to precipitate out of the MnBi liquid during the solidification process. As result, the composition of the Mn-Bi alloy with the largest amount of the desired LTP (low temperature phase) MnBi and highest saturation magnetization will be over-stoichiometric and rich in Mn. The amount of additional Mn required to compensate the Mn precipitation depends on solidification rate: the faster the quench speed, the less Mn precipitates. Here we report a systematic study of the effect of composition and heat treatments on the phase contents and magnetic properties of Mn-Bi alloys. In this study, Mn-Bi alloys with 14 compositions were prepared using conventional metallurgical methods such as arc melting and vacuum heat treatment, and the obtained alloys were analyzed for compositions, crystal structures, phase content, and magnetic properties. The results show that the composition with 55 at.% Mn exhibits the highest LTP MnBi content and the highest magnetization. The sample with this composition shows >90 wt.% LTP MnBi content. Its measured saturation magnetization is 68 emu/g with 2.3 T applied field at 300 K; its coercivity is 13 kOe and its energy product is 12 MGOe at 300 K. A bulk magnet fabricated using this powder exhibits an energy product of 8.2 MGOe.

  15. Microsoft PowerPoint - NOW2004_MiniBooNE.ppt

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NOW2004 Workshop * Extensions to the Neutrino Standard Model: Sterile Neutrinos * MiniBooNE: Status and Prospects * Future Directions if MiniBooNE Sees Oscillations 2 Three Signal Regions * LSND ∆m 2 = 0.1 - 10 eV 2 , small mixing * Atmospheric ∆m 2 = 2.5×10 -3 eV 2 , large mixing * Solar ∆m 2 = 8.2×10 -5 eV 2 , large mixing ∆m 13 ∆m 12 ∆m 23 2 2 2 ( ) 1 sin 2 sin (1.27 / ) P m L E α α ν ν θ → = - ∆ 2 2 2 2 2 2 21 32 31 Three distinct neutrino oscillation signals, with For

  16. Application for Presidential Permit OE Docket No. PP-400 TDI-NE - New

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    England Clean Power Link Project - Comments and Motion to Intervene of Conservation Law Foundation | Department of Energy - New England Clean Power Link Project - Comments and Motion to Intervene of Conservation Law Foundation Application for Presidential Permit OE Docket No. PP-400 TDI-NE - New England Clean Power Link Project - Comments and Motion to Intervene of Conservation Law Foundation Conservation Law Foundation (CLF) provides the following comments and Motion to Intervene regarding

  17. Application for Presidential Permit OE Docket No. PP-400 TDI-NE - New

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    England Clean Power Link Project: Comments and Motion to Intervene Out of Time of Allco Renewable Energy Limited | Department of Energy - New England Clean Power Link Project: Comments and Motion to Intervene Out of Time of Allco Renewable Energy Limited Application for Presidential Permit OE Docket No. PP-400 TDI-NE - New England Clean Power Link Project: Comments and Motion to Intervene Out of Time of Allco Renewable Energy Limited ALLCO Renewable Energy Limited provides the following

  18. Measuring n-N Deep Inelastic Cross Sections at MiniBooNE

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    + Cross Section Results from MiniBooNE Mike Wilking TRIUMF / University of Colorado NuInt 22 May 2009 CCπ + in Oscillation Experiments  The next generation of ν oscillation experiments lie at low, mostly unexplored ν energies  CCQE is the signal process for oscillation measurements  At these energies, CCπ + is the dominant charged-current background T2K NOνA CCπ + CCQE DIS Charged Current Cross Sections Previous CCπ + Measurements  The plot shows previous absolute cross

  19. NE-23 Elimination of the Chupadera Mesa and Los Alamos County Industrial Waste

    Office of Legacy Management (LM)

    AM? 2 2 1986 NE-23 Elimination of the Chupadera Mesa and Los Alamos County Industrial Waste Line Sites from Further Consideration for FUSRAP Inclusion Carlos E. Garcia, Director Environmental Safety and Health Division Albuquerque Operations Office The enclosed material is being provided to you to document the final actions taken under the Department's Formerly Utilized Sites Remedial Action Program (FUSRAP) for the Chupadera Mesa area and the Los Alamos County Industrial Waste Lines, New

  20. ENERGY MEASUREMENTS GROUP EG&G SURVEY REPORT NE-F-003

    Office of Legacy Management (LM)

    * * * * * * * * * ~n~EGc.G ENERGY MEASUREMENTS GROUP EG&G SURVEY REPORT NE-F-003 FEBRUARY 1983 THE REMOTE SENSING LABORATORY OF THE UNITED STATES DEPARTMENT OF ENERGY AN AERIAL RADIOLOGICAL SURVEY OF AN AREA SURROUNDING THE FORMER MIDDLESEX SAMPLING PLANT IN MIDDLESEX, NEW JERSEY DATE OF SURVEY: MAY 1978 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of

  1. Possible shape coexistence and magnetic dipole transitions in {sup 17}C and {sup 21}Ne

    SciTech Connect (OSTI)

    Sagawa, H.; Zhou, X. R.; Suzuki, Toshio; Yoshida, N.

    2008-10-15

    Magnetic dipole (M1) transitions of N=11 nuclei {sup 17}C and {sup 21}Ne are investigated by using shell model and deformed Skyrme Hartree-Fock + blocked BCS wave functions. Shell model calculations predict well observed energy spectra and magnetic dipole transitions in {sup 21}Ne, while the results are rather poor to predict these observables in {sup 17}C. In the deformed HF calculations, the ground states of the two nuclei are shown to have large prolate deformations close to {beta}{sub 2}=0.4. It is also pointed out that the first K{sup {pi}}=1/2{sup +} state in {sup 21}Ne is prolately deformed, while the first K{sup {pi}}=1/2{sup +} state in {sup 17}C is predicted to have a large oblate deformation close to the ground state in energy, We point out that the experimentally observed large hindrance of the M1 transition between I{sup {pi}}=1/2{sup +} and 3/2{sup +} in {sup 17}C can be attributed to a shape coexistence near the ground state of {sup 17}C.

  2. MCViNE- An object oriented Monte Carlo neutron ray tracing simulation package

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lin, J. Y. Y.; Smith, Hillary L.; Granroth, Garrett E.; Abernathy, Douglas L.; Lumsden, Mark D.; Winn, Barry L.; Aczel, Adam A.; Aivazis, Michael; Fultz, Brent

    2015-11-28

    MCViNE (Monte-Carlo VIrtual Neutron Experiment) is an open-source Monte Carlo (MC) neutron ray-tracing software for performing computer modeling and simulations that mirror real neutron scattering experiments. We exploited the close similarity between how instrument components are designed and operated and how such components can be modeled in software. For example we used object oriented programming concepts for representing neutron scatterers and detector systems, and recursive algorithms for implementing multiple scattering. Combining these features together in MCViNE allows one to handle sophisticated neutron scattering problems in modern instruments, including, for example, neutron detection by complex detector systems, and single and multiplemore » scattering events in a variety of samples and sample environments. In addition, MCViNE can use simulation components from linear-chain-based MC ray tracing packages which facilitates porting instrument models from those codes. Furthermore it allows for components written solely in Python, which expedites prototyping of new components. These developments have enabled detailed simulations of neutron scattering experiments, with non-trivial samples, for time-of-flight inelastic instruments at the Spallation Neutron Source. Examples of such simulations for powder and single-crystal samples with various scattering kernels, including kernels for phonon and magnon scattering, are presented. As a result, with simulations that closely reproduce experimental results, scattering mechanisms can be turned on and off to determine how they contribute to the measured scattering intensities, improving our understanding of the underlying physics.« less

  3. MCViNE- An object oriented Monte Carlo neutron ray tracing simulation package

    SciTech Connect (OSTI)

    Lin, J. Y. Y.; Smith, Hillary L.; Granroth, Garrett E.; Abernathy, Douglas L.; Lumsden, Mark D.; Winn, Barry L.; Aczel, Adam A.; Aivazis, Michael; Fultz, Brent

    2015-11-28

    MCViNE (Monte-Carlo VIrtual Neutron Experiment) is an open-source Monte Carlo (MC) neutron ray-tracing software for performing computer modeling and simulations that mirror real neutron scattering experiments. We exploited the close similarity between how instrument components are designed and operated and how such components can be modeled in software. For example we used object oriented programming concepts for representing neutron scatterers and detector systems, and recursive algorithms for implementing multiple scattering. Combining these features together in MCViNE allows one to handle sophisticated neutron scattering problems in modern instruments, including, for example, neutron detection by complex detector systems, and single and multiple scattering events in a variety of samples and sample environments. In addition, MCViNE can use simulation components from linear-chain-based MC ray tracing packages which facilitates porting instrument models from those codes. Furthermore it allows for components written solely in Python, which expedites prototyping of new components. These developments have enabled detailed simulations of neutron scattering experiments, with non-trivial samples, for time-of-flight inelastic instruments at the Spallation Neutron Source. Examples of such simulations for powder and single-crystal samples with various scattering kernels, including kernels for phonon and magnon scattering, are presented. As a result, with simulations that closely reproduce experimental results, scattering mechanisms can be turned on and off to determine how they contribute to the measured scattering intensities, improving our understanding of the underlying physics.

  4. Comparison of GiBUU calculations with MiniBooNE pion production data

    SciTech Connect (OSTI)

    Lalakulich, O.; Mosel, U.

    2015-05-15

    Background: Neutrino-induced pion production can give important informationon the axial coupling to nucleon resonances. Furthermore, pion production represents a major background to quasielastic-like events. one pion production data from the MiniBooNE in charged current neutrino scattering in mineral oil appeared higher than expected within conventional theoretical approaches. Purpose: We aim to investigate which model parameters affect the calculated cross section and how they do this. Method: The Giessen Boltzmann–Uehling–Uhlenbeck (GiBUU) model is used for an investigation of neutrino-nucleus reactions. Results: Presented are integrated and differential cross sections for 1π{sup +} and 1π{sup 0} production before and after final state interactions in comparison with the MiniBooNE data. Conclusions: For the MiniBooNE flux all processes (QE, 1π-background, Δ, higher resonance production, DIS) contribute to the observed final state with one pion of a given charge. The uncertainty in elementary pion production cross sections leads to a corresponding uncertainty in the nuclear cross sections. Final state interactions change the shape of the muon-related observables only slightly, but they significantly change the shape of pion distributions.

  5. Magnetostructural phase transformations in Tb 1-x Mn 2

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zou, Junding; Paudyal, Durga; Liu, Jing; Mudryk, Yaroslav; Pecharsky, Vitalij K.; Gschneidner, Karl A.

    2015-01-16

    Magnetism and phase transformations in non-stoichiometric Tb1-xMn2 (x = 0.056, 0.039) have been studied as functions of temperature and magnetic field using magnetization, heat capacity, and X-ray powder diffraction measurements. Lowering the temperature, the compounds sequentially order ferrimagnetically and antiferromagnetically, and finally, exhibit spin reorientation transitions. Moreover, these structural distortions from room temperature cubic to low temperature rhombohedral structures occur at TN, and are accompanied by large volume changes reaching ~-1.27% and -1.42%, respectively. First principles electronic structure calculations confirm the phase transformation from the ferrimagnetic cubic structure to the antiferromagnetic rhombohedral structure in TbMn2.

  6. On the state of Mn impurity implanted in Si

    SciTech Connect (OSTI)

    Orlov, A. F.; Bublik, V. T.; Vdovin, V. I.; Agafonov, Yu. A.; Balagurov, L. A.; Zinenko, V. I.; Kulemanov, I. V.; Shcherbachev, K. D.

    2009-07-15

    The state of manganese impurity in implanted silicon at implantation doses of up to 5 x 10{sup 16} cm{sup -2} has been investigated by X-ray diffraction and transmission electron microscopy. It is established that, after short-term vacuum annealing at 850{sup o}C, most of the implanted manganese impurities are in microinclusions up to 20 nm in size formed by a tetragonal silicide phase of the Mn{sub 15}Si{sub 26} type.

  7. High-pressure structural study of MnF2

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Stavrou, Elissaios; Yao, Yansun; Goncharov, Alexander F.; Konopkova, Zuzana; Raptis, Constantine

    2015-02-01

    In this study, manganese fluoride (MnF2) with the tetragonal rutile-type structure has been studied using a synchrotron angle-dispersive powder x-ray diffraction and Raman spectroscopy in a diamond anvil cell up to 60 GPa at room temperature combined with first-principles density functional calculations. The experimental data reveal two pressure-induced structural phase transitions with the following sequence: rutile → SrI2 type (3 GPa)→ α–PbCl2 type (13 GPa). Complete structural information, including interatomic distances, has been determined in the case of MnF2 including the exact structure of the debated first high-pressure phase. First-principles density functional calculations confirm this phase transition sequence, and themore » two calculated transition pressures are in excellent agreement with the experiment. Lattice dynamics calculations also reproduce the experimental Raman spectra measured for the ambient and high-pressure phases. The results are discussed in line with the possible practical use of rutile-type fluorides in general and specifically MnF2 as a model compound to reveal the HP structural behavior of rutile-type SiO2 (Stishovite).« less

  8. Manganese valence and coordination structure in Mn,Mg-codoped {gamma}-AlON green phosphor

    SciTech Connect (OSTI)

    Takeda, Takashi; Xie, Rong-Jun; Hirosaki, Naoto; Matsushita, Yoshitaka; Honma, Tetuso

    2012-10-15

    The valence and coordination structure of manganese in a Mn,Mg-codoped {gamma}-AlON spinel-type oxynitride green phosphor were studied by synchrotron X-ray diffraction and absorption fine structure measurements. The absorption edge position of the XANES revealed the bivalency of Mn. Two cation sites are available in the spinel structure for cation doping: a tetrahedral site and an octahedral site. The pre-edge of the XANES and the distance to the nearest neighbor atoms obtained from the EXAFS measurement showed that Mn was situated at the tetrahedral site. Rietveld analysis showed that the vacancy occupied the octahedral site. The preferential occupation of the tetrahedral site by Mn and the roles of N and Mg are discussed in relation to the spinel crystal structure. - Graphical Abstract: Fourier transform of EXAFS of Mn K-edge for Mn,Mg-codoped green phosphor and Mn coordination structure. Highlights: Black-Right-Pointing-Pointer Mn, Mg-codoped {gamma}-AlON green phosphor for white LED. Black-Right-Pointing-Pointer The valence of Mn is divalent. Black-Right-Pointing-Pointer Mn occupies the tetrahedral site in the spinel structure.

  9. Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys

    SciTech Connect (OSTI)

    Lobo, D. N.; Priolkar, K. R.; Emura, S.; Nigam, A. K.

    2014-11-14

    The structure, magnetic, and martensitic properties of Fe doped Ni-Mn-In magnetic shape memory alloys have been studied by differential scanning calorimetry, magnetization, resistivity, X-ray diffraction (XRD), and EXAFS. While Ni{sub 2}MnIn{sub 1?x}Fe{sub x} (0???x???0.6) alloys are ferromagnetic and non martensitic, the martensitic transformation temperature in Ni{sub 2}Mn{sub 1.5}In{sub 1?y}Fe{sub y} and Ni{sub 2}Mn{sub 1.6}In{sub 1?y}Fe{sub y} increases for lower Fe concentrations (y???0.05) before decreasing sharply for higher Fe concentrations. XRD analysis reveals presence of cubic and tetragonal structural phases in Ni{sub 2}MnIn{sub 1?x}Fe{sub x} at room temperature with tetragonal phase content increasing with Fe doping. Even though the local structure around Mn and Ni in these Fe doped alloys is similar to martensitic Mn rich Ni-Mn-In alloys, presence of ferromagnetic interactions and structural disorder induced by Fe affect Mn-Ni-Mn antiferromagnetic interactions resulting in suppression of martensitic transformation in these Fe doped alloys.

  10. Strategic Plan for Nuclear Energy -- Knowledge Base for Advanced Modeling and Simulation (NE-KAMS)

    SciTech Connect (OSTI)

    Rich Johnson; Kimberlyn C. Mousseau; Hyung Lee

    2011-09-01

    NE-KAMS knowledge base will assist computational analysts, physics model developers, experimentalists, nuclear reactor designers, and federal regulators by: (1) Establishing accepted standards, requirements and best practices for V&V and UQ of computational models and simulations, (2) Establishing accepted standards and procedures for qualifying and classifying experimental and numerical benchmark data, (3) Providing readily accessible databases for nuclear energy related experimental and numerical benchmark data that can be used in V&V assessments and computational methods development, (4) Providing a searchable knowledge base of information, documents and data on V&V and UQ, and (5) Providing web-enabled applications, tools and utilities for V&V and UQ activities, data assessment and processing, and information and data searches. From its inception, NE-KAMS will directly support nuclear energy research, development and demonstration programs within the U.S. Department of Energy (DOE), including the Consortium for Advanced Simulation of Light Water Reactors (CASL), the Nuclear Energy Advanced Modeling and Simulation (NEAMS), the Light Water Reactor Sustainability (LWRS), the Small Modular Reactors (SMR), and the Next Generation Nuclear Power Plant (NGNP) programs. These programs all involve computational modeling and simulation (M&S) of nuclear reactor systems, components and processes, and it is envisioned that NE-KAMS will help to coordinate and facilitate collaboration and sharing of resources and expertise for V&V and UQ across these programs. In addition, from the outset, NE-KAMS will support the use of computational M&S in the nuclear industry by developing guidelines and recommended practices aimed at quantifying the uncertainty and assessing the applicability of existing analysis models and methods. The NE-KAMS effort will initially focus on supporting the use of computational fluid dynamics (CFD) and thermal hydraulics (T/H) analysis for M&S of nuclear

  11. Effect of composition and heat treatment on MnBi magnetic materials

    SciTech Connect (OSTI)

    Cui, Jun [Pacific Northwest National Laboratory; Choi, Jung-Pyung [Pacific Northwest National Laboratory; Polikarpov, Evgueni [Pacific Northwest National Laboratory; Bowden, Mark E [Pacific Northwest National Laboratory; Xie, Wei [Pacific Northwest National Laboratory; Li, Guosheng [Pacific Northwest National Laboratory; Nie, Zimin [Pacific Northwest National Laboratory; Zarkevich, Nikolai [Ames Laboratory; Kramer, Matthew J [Ames Laboratory; Johnson, Duane [Ames Laboratory

    2014-10-01

    The metallic compound MnBi is a promising rare-earth-free permanent magnet material, unique among all candidates for its high intrinsic coercivity (Hci) and its large positive temperature coefficient. The Hci of MnBi in thin-film or powder form can exceed 12 and 26 kOe at 300 and 523 K, respectively. Such a steep rise in Hci with increasing temperature is unique to MnBi. Consequently, MnBi is a highly sought-after hard phase for exchange coupling nanocomposite magnets. However, the reaction between Mn and Bi is peritectic, and hence Mn tends to precipitate out of the MnBi liquid during the solidification process. As result, when the alloy is prepared using conventional induction or arc-melting casting methods, additional Mn is required to compensate the precipitation of Mn. In addition to composition, post-casting annealing plays an important role in obtaining a high content of MnBi low-temperature phase (LTP) because the annealing encourages the Mn precipitates and the unreacted Bi to react, forming the desired LTP phase. Here we report a systematic study of the effect of composition and heat treatments on the phase content and magnetic properties of MnBi alloys. In this study, 14 compositions were prepared using conventional metallurgical methods, and the compositions, crystal structures, phase content and magnetic properties of the resulting alloys were analyzed. The results show that the composition with 55 at.% Mn exhibits both the highest LTP content (93 wt.%) and magnetization (74 emu g?1 with 9 T applied field at 300 K).

  12. Dynamic study of (De)sodiation in alpha-MnO2 nanowires

    SciTech Connect (OSTI)

    Yuan, Yifei; Ma, Lu; He, Kun; Yao, Wentao; Nie, Anmin; Bi, Xuanxuan; Amine, Khalil; Wu, Tianpin; Lu, Jun; Shahbazian-Yassr, Reza

    2016-01-01

    In this report, the electrochemical sodiation and desodiation in single crystalline alpha-MnO2 nanowires are studied dynamically at both single particle level using in situ transmission electron microscopy (TEM) and bulk level using in situ synchrotron X-ray. The TEM results suggest that the first sodiation process starts with tunnel-based Na+ intercalation, experiences the formation of Na0.5MnO2 as a result of tunnel degradation, and ends with the Mn2O3 phase. The inserted Na+ can be partially extracted out of the sodiated products, and the following cycles are dominated by the reversible conversion reaction between Na0.5MnO2 and Mn2O3. The Mn valence evolution inside a cycling coin using alpha-MnO2 nanowire electrode also exhibits partially reversible characteristic, agreeing well with the in situ TEM analysis. The sodiation is compared with lithiation in the same alpha-MnO2 nanowires. Both Na+ and Li+ interact with the tunneled structure via a similar tunnel -driven intercalation mechanism before Mn4+ is reduced to Mn3.5+. For the following deep insertion, the tunnels survive up. to LiMnO2 (Mn3+) during lithiation, while the sodiation proceeds via a different mechanism that involves obvious phase transition and fast tunnel degradation after Mn's valence is below 3.5+. The difference in charge carrier insertion mechanisms can be ascribed to the strong interaction between the tunnel frame and inserted Na+ possessing a larger ionic size than inserted Li+.

  13. Large exchange bias enhancement in (Pt(or Pd)/Co)/IrMn/Co trilayers with ultrathin IrMn thanks to interfacial Cu dusting

    SciTech Connect (OSTI)

    Vinai, G. [SPINTEC, UMR 8191 CEA/CNRS/UJF/Grenoble-INP, CEA/INAC, 17, rue des Martyrs, 38054 Grenoble (France); Crocus Technology, 4 Place Robert Schuman, 38054 Grenoble (France); Moritz, J. [Institut Jean Lamour, UMR 7198 CNRS - Universit de Lorraine, Bd des Aiguillettes, BP 70239, F-54506 Vandoeuvre-les-Nancy Cedex (France); Bandiera, S. [Crocus Technology, 4 Place Robert Schuman, 38054 Grenoble (France); Prejbeanu, I. L.; Dieny, B. [SPINTEC, UMR 8191 CEA/CNRS/UJF/Grenoble-INP, CEA/INAC, 17, rue des Martyrs, 38054 Grenoble (France)

    2014-04-21

    The magnitude of exchange bias (H{sub ex}) at room temperature can be significantly enhanced in IrMn/Co and (Pt(or Pd)/Co)/IrMn/Co structures thanks to the insertion of an ultrathin Cu dusting layer at the IrMn/Co interface. The combination of trilayer structure and interfacial Cu dusting leads to a three-fold increase in H{sub ex} as compared to the conventional IrMn/Co bilayer structure, with an increased blocking temperature (T{sub B}) and a concave curvature of the temperature dependence H{sub ex}(T), ideal for improved Thermally Assisted-Magnetic Random Access Memory storage layer. This exchange bias enhancement is ascribed to a reduction of the spin frustration at the IrMn/Co interface thanks to interfacial Cu addition.

  14. Synthesis, characterization and electrochemical performance of Al-substituted Li₂MnO₃

    SciTech Connect (OSTI)

    Dhital, Chetan; Huq, Ashfia; Paranthaman, Mariappan Parans; Manivannan, Ayyakkannu; Torres-Castro, Loraine; Shojan, Jifi; Julien, Christian M.; Katiyar, Ram S.

    2015-08-08

    Li2MnO3 is known to be electrochemically inactive due to Mn in tetravalent oxidation state. Several compositions such as Li2MnO3 , Li1.5Al0.17MnO3, Li1.0Al0.33MnO3 and Li0.5Al0.5MnO3 were synthesized by a sol–gel Pechini method. All the samples were characterized with x-ray diffraction, Raman, x-ray photoelectron spectroscopy, scanning electron microscopy, Tap density and BET analyzer. X-ray diffraction patterns indicated the presence of monoclinic phase for pristine Li2MnO3and mixed monoclinic/spinel phases (Li2 - xMn1 - yAlx + yO3 + z) for Al-substituted Li2MnO3compounds. The Al substitution seems to occur both at Li and Mn sites, which could explain the presence of spinel phase. X-ray photoelectron spectroscopy for Mn 2p orbital reveals a significant decrease in binding energy for Li1.0Al0.33MnO3 and Li0.5Al0.5MnO3 compounds. Cyclic voltammetry, charge/discharge cycles and electrochemical impedance spectroscopy were also performed. A discharge capacity of 24 mAh g-1 for Li2MnO3, 68 mAh g-1 for Li1.5Al0.17MnO3, 58 mAh g-1 for Li1.0Al0.33MnO3 and 74 mAh g-1 for Li0.5Al0.5MnO3 were obtained. As a result, aluminum substitutions increased the formation of spinel phase which is responsible for cycling.

  15. NE-23

    Office of Legacy Management (LM)

    4:00 p.m., Monday through Friday (except Federal holidays), at the DOE Public Document Room located in Room lE-190 of the Forrestal Building, 1000 Independence Avenue, S.W.,...

  16. NE-24

    Office of Legacy Management (LM)

    the Bureau of Hines Site at Albany, Oregon, for Remedial Action Under the Formerly Utilized Sites Remedial Action Program I L@ _I' J.-La&one, Manager Oak Ridge Operations Office Based on the data in the attached draft reports, it has been determined that the subject site is contaminated with residual radioactive material ' as a result of Manhattan Engineer District/Atomic Energy Commission operations P * at this site. The contamination is in excess of the acceptable guidelines and warrants

  17. NE-23,

    Office of Legacy Management (LM)

    Joseph A. Warburton Chainnan, Radiological and Toxicological Safety Board University of Nevada System DRIASC, P.O. Box 60220 Reno, Nevada 89506 Dear Dr. Warburton: The Department ...

  18. 18Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  19. NE-24

    Office of Legacy Management (LM)

    Sites Remedial Actlon Program (FUSRAP) ' F .- ,: ... Conference Report and the Energy and Water Appropriations ... Jersey, and Surrounding Communities," prepared by ORNL, ...

  20. 19Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  1. 20Ne

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

  2. The magnetic origin of multiferroic Y{sub 2}CoMnO{sub 6}

    SciTech Connect (OSTI)

    Jia, Ting; Zeng, Zhi; Li, X. G.; Lin, H. Q.

    2015-05-07

    It has been found experimentally that the ferroelectricity in Y{sub 2}CoMnO{sub 6} is driven by a magnetic ordering of collinear up-up-down-down (↑↑↓↓). Here, the origin of the magnetism and thereby ferroelectricity is studied using first-principles calculations. We first confirm that the experimentally observed ↑↑↓↓ antiferromagnetic structure is the ground state of Y{sub 2}CoMnO{sub 6}. Additionally, both the Co{sup 2+} and Mn{sup 4+} are in the high-spin state. By analyzing the exchange coupling and corresponding pathways, we conclude that the ↑↑↓↓ spin order in Y{sub 2}CoMnO{sub 6} originates from a subtle competition between the ferromagnetic Co-O-Mn super-exchange and antiferromagnetic Co-Mn direct-exchange along c axis.

  3. Structural and ferromagnetic properties of an orthorhombic phase of MnBi stabilized with Rh additions

    SciTech Connect (OSTI)

    Taufour, Valentin; Thimmaiah, Srinivasa; March, Stephen; Saunders, Scott; Sun, Kewei; Lamichhane, Tej Nath; Kramer, Matthew J.; Bud’ko, Sergey L.; Canfield, Paul C.

    2015-07-28

    The article addresses the possibility of alloy elements in MnBi which may modify the thermodynamic stability of the NiAs-type structure without significantly degrading the magnetic properties. The addition of small amounts of Rh and Mn provides an improvement in the thermal stability with some degradation of the magnetic properties. The small amounts of Rh and Mn additions in MnBi stabilize an orthorhombic phase whose structural and magnetic properties are closely related to the ones of the previously reported high-temperature phase of MnBi (HT MnBi). The properties of the HT MnBi, which is stable between 613 and 719 K, have not been studied in detail because of its transformation to the stable low-temperature MnBi (LT MnBi), making measurements near and below its Curie temperature difficult. The Rh-stabilized MnBi with chemical formula Mn1.0625–xRhxBi [x=0.02(1)] adopts a new superstructure of the NiAs/Ni2In structure family. It is ferromagnetic below a Curie temperature of 416 K. The critical exponents of the ferromagnetic transition are not of the mean-field type but are closer to those associated with the Ising model in three dimensions. The magnetic anisotropy is uniaxial; the anisotropy energy is rather large, and it does not increase when raising the temperature, contrary to what happens in LT MnBi. The saturation magnetization is approximately 3μB/f.u. at low temperatures. Thus, while this exact composition may not be application ready, it does show that alloying is a viable route to modifying the stability of this class of rare-earth-free magnet alloys.

  4. Cr(OH)₃(s) Oxidation Induced by Surface Catalyzed Mn(II) Oxidation

    SciTech Connect (OSTI)

    Namgung, Seonyi; Kwon, M.; Qafoku, Nikolla; Lee, Gie Hyeon

    2014-09-16

    This study examined the feasibility of Cr(OH)₃(s) oxidation mediated by surface catalyzed Mn(II) oxidation under common groundwater pH conditions as a potential pathway of natural Cr(VI) contaminations. Dissolved Mn(II) (50 μM) was reacted with or without synthesized Cr(OH)₃(s) (1.0 g/L) at pH 7 – 9 under oxic or anoxic conditions. In the absence of Cr(OH)₃(s), homogeneous Mn(II) oxidation by dissolved O₂ was not observed at pH ≤ 8.0 for 50 d. At pH 9.0, by contrast, dissolved Mn(II) was completely removed within 8 d and precipitated as hausmannite. When Cr(OH)₃(s) was present, this solid was oxidized and released substantial amounts of Cr(VI) as dissolved Mn(II) was added into the suspension at pH ≥ 8.0 under oxic conditions. Our results suggest that Cr(OH)₃(s) was readily oxidized by a newly formed Mn oxide as a result of Mn(II) oxidation catalyzed on Cr(OH)₃(s) surface. XANES analysis of the residual solids after the reaction between 1.0 g/L Cr(OH)₃(s) and 204 μM Mn(II) at pH 9.0 for 22 d revealed that the product of surface catalyzed Mn(II) oxidation resembled birnessite. The rate and extent of Cr(OH)₃(s) oxidation was likely controlled by those of surface catalyzed Mn(II) oxidation as the production of Cr(VI) increased with increasing pH and initial Mn(II) concentrations. This study evokes the potential environmental hazard of sparingly soluble Cr(OH)₃(s) that can be a source of Cr(VI) in the presence of dissolved Mn(II).

  5. Structural and ferromagnetic properties of an orthorhombic phase of MnBi stabilized with Rh additions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Taufour, Valentin; Thimmaiah, Srinivasa; March, Stephen; Saunders, Scott; Sun, Kewei; Lamichhane, Tej Nath; Kramer, Matthew J.; Bud’ko, Sergey L.; Canfield, Paul C.

    2015-07-28

    The article addresses the possibility of alloy elements in MnBi which may modify the thermodynamic stability of the NiAs-type structure without significantly degrading the magnetic properties. The addition of small amounts of Rh and Mn provides an improvement in the thermal stability with some degradation of the magnetic properties. The small amounts of Rh and Mn additions in MnBi stabilize an orthorhombic phase whose structural and magnetic properties are closely related to the ones of the previously reported high-temperature phase of MnBi (HT MnBi). The properties of the HT MnBi, which is stable between 613 and 719 K, have notmore » been studied in detail because of its transformation to the stable low-temperature MnBi (LT MnBi), making measurements near and below its Curie temperature difficult. The Rh-stabilized MnBi with chemical formula Mn1.0625–xRhxBi [x=0.02(1)] adopts a new superstructure of the NiAs/Ni2In structure family. It is ferromagnetic below a Curie temperature of 416 K. The critical exponents of the ferromagnetic transition are not of the mean-field type but are closer to those associated with the Ising model in three dimensions. The magnetic anisotropy is uniaxial; the anisotropy energy is rather large, and it does not increase when raising the temperature, contrary to what happens in LT MnBi. The saturation magnetization is approximately 3μB/f.u. at low temperatures. Thus, while this exact composition may not be application ready, it does show that alloying is a viable route to modifying the stability of this class of rare-earth-free magnet alloys.« less

  6. Electronic Structure and Oxidation State Changes in the Mn (4) Ca Cluster of Photosystem II

    SciTech Connect (OSTI)

    Yano, J.; Pushkar, Y.; Messinger, J.; Bergmann, U.; Glatzel, P.; Yachandra, V.K.; /SLAC

    2012-08-17

    Oxygen-evolving complex (Mn{sub 4}Ca cluster) of Photosystem II cycles through five intermediate states (S{sub i}-states, i = 0-4) before a molecule of dioxygen is released. During the S-state transitions, electrons are extracted from the OEC, either from Mn or alternatively from a Mn ligand. The oxidation state of Mn is widely accepted as Mn{sub 4}(III{sub 2},IV{sub 2}) and Mn{sub 4}(III,IV{sub 3}) for S{sub 1} and S{sub 2} states, while it is still controversial for the S{sub 0} and S{sub 3} states. We used resonant inelastic X-ray scattering (RIXS) to study the electronic structure of Mn{sub 4}Ca complex in the OEC. The RIXS data yield two-dimensional plots that provide a significant advantage by obtaining both K-edge pre-edge and L-edge-like spectra (metal spin state) simultaneously. We have collected data from PSII samples in the each of the S-states and compared them with data from various inorganic Mn complexes. The spectral changes in the Mn 1s2p{sub 3/2} RIXS spectra between the S-states were compared to those of the oxides of Mn and coordination complexes. The results indicate strong covalency for the electronic configuration in the OEC, and we conclude that the electron is transferred from a strongly delocalized orbital, compared to those in Mn oxides or coordination complexes. The magnitude for the S{sub 0} to S{sub 1}, and S{sub 1} to S{sub 2} transitions is twice as large as that during the S{sub 2} to S{sub 3} transition, indicating that the electron for this transition is extracted from a highly delocalized orbital with little change in charge density at the Mn atoms.

  7. Preparation and electrochemical properties of lamellar MnO{sub 2} for supercapacitors

    SciTech Connect (OSTI)

    Yan, Jun; Wei, Tong; Cheng, Jie; Fan, Zhuangjun; Zhang, Milin

    2010-02-15

    Lamellar birnessite-type MnO{sub 2} materials were prepared by changing the pH of the initial reaction system via hydrothermal synthesis. The interlayer spacing of MnO{sub 2} with a layered structure increased gradually when the initial pH value varied from 12.43 to 2.81, while the MnO{sub 2}, composed of {alpha}-MnO{sub 2} and {gamma}-MnO{sub 2}, had a rod-like structure at pH 0.63. Electrochemical studies indicated that the specific capacitance of birnessite-type MnO{sub 2} was much higher than that of rod-like MnO{sub 2} at high discharge current densities due to the lamellar structure with fast intercalation/deintercalation of protons and high utilization of MnO{sub 2}. The initial specific capacitance of MnO{sub 2} prepared at pH 2.81 was 242.1 F g{sup -1} at 2 mA cm{sup -2} in 2 mol L{sup -1} (NH{sub 4}){sub 2}SO{sub 4} aqueous electrolyte. The capacitance increased by about 8.1% of initial capacitance after 200 cycles at a current density of 100 mA cm{sup -2}.

  8. In operando X-ray studies of the conversion reaction in Mn3O4...

    Office of Scientific and Technical Information (OSTI)

    of the conversion reaction in Mn3O4 lithium battery anodes Citation Details ... energy storage (including batteries and capacitors), hydrogen and fuel ...

  9. Phase stability of the SrMnO[subscript 3] hexagonal perovskite...

    Office of Scientific and Technical Information (OSTI)

    SrMnOsubscript 3 hexagonal perovskite system at high pressure and temperature Citation ... Country of Publication: United States Language: ENGLISH Word Cloud More Like This Full ...

  10. DOE-NE Proliferation and Terrorism Risk Assessment: FY12 Plans Update

    SciTech Connect (OSTI)

    Sadasivan, Pratap

    2012-06-21

    This presentation provides background information on FY12 plans for the DOE Office of Nuclear Energy Proliferation and Terrorism Risk Assessment program. Program plans, organization, and individual project elements are described. Research objectives are: (1) Develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of current reactors; (2) Develop improvements in the affordability of new reactors to enable nuclear energy; (3) Develop Sustainable Nuclear Fuel Cycles; and (4) Understand and minimize the risks of nuclear proliferation and terrorism - Goal is to enable the use of risk information to inform NE R&D program planning.

  11. Application for Presidential Permit OE Docket No. PP-400 TDI-NE New England

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Clean Power Link Project: Comments and Motion to Intervene Out of Time of Allco Renewable Energy Limited from TDI | Department of Energy New England Clean Power Link Project: Comments and Motion to Intervene Out of Time of Allco Renewable Energy Limited from TDI Application for Presidential Permit OE Docket No. PP-400 TDI-NE New England Clean Power Link Project: Comments and Motion to Intervene Out of Time of Allco Renewable Energy Limited from TDI TDI offers their response to Allco

  12. HIA 2015 DOE Zero Energy Ready Home Case Study: Charles Thomas Homes, Anna Model, Omaha, NE

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Thomas Homes Anna Model Omaha, NE DOE ZERO ENERGY READY HOME(tm) The U.S. Department of Energy invites home builders across the country to meet the extraordinary levels of excellence and quality specified in DOE's Zero Energy Ready Home program (formerly known as Challenge Home). Every DOE Zero Energy Ready Home starts with ENERGY STAR Certified Homes Version 3.0 for an energy-efficient home built on a solid foundation of building science research. Advanced technologies are designed in to give

  13. MiniBooNE Neutrino Physics at the University of Alabama

    SciTech Connect (OSTI)

    Stancu, Ion

    2007-04-27

    This report summarizes the activities conducted by the UA group under the auspices of the DoE/EPSCoR grant number DE--FG02--04ER46112 since the date of the previous progress report, i.e., since November 2005. It also provides a final report of the accomplishments achieved during the entire period of this grant (February 2004 to January 2007). The grant has fully supported the work of Dr. Yong Liu (postdoctoral research assistant -- in residence at Fermilab) on the MiniBooNE reconstruction and particle identification (PID) algorithms.

  14. Effectiveness of projectile screening in single and multiple ionization of Ne by B{sup 2+}

    SciTech Connect (OSTI)

    Wolff, W.; Luna, H.; Santos, A. C. F.; Montenegro, E. C.; DuBois, R. D.; Montanari, C. C.; Miraglia, J. E.

    2011-10-15

    Pure multiple ionization cross sections of Ne by B{sup 2+} projectiles have been measured in the energy range of 0.75 to 4.0 MeV and calculated using the continuum distorted wave-eikonal initial state approximation. The experiment and calculations show that the ionization cross sections by B{sup 2+}, principally for the production of highly charged recoils, is strongly enhanced when compared to the bare projectile with the same charge state, He{sup 2+}, at the same velocities.

  15. International Falls, MN Natural Gas Pipeline Imports From Canada (Dollars

    U.S. Energy Information Administration (EIA) Indexed Site

    per Thousand Cubic Feet) Dollars per Thousand Cubic Feet) International Falls, MN Natural Gas Pipeline Imports From Canada (Dollars per Thousand Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's 1.71 2.03 2.00 2.33 2000's 2.77 4.85 3.01 -- -- 11.20 -- - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 08/31/2016 Next Release Date: 09/30/2016 Referring Pages:

  16. International Falls, MN Natural Gas Pipeline Imports From Canada (Million

    U.S. Energy Information Administration (EIA) Indexed Site

    Cubic Feet) Million Cubic Feet) International Falls, MN Natural Gas Pipeline Imports From Canada (Million Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 1990's 6,373 6,544 6,103 4,857 2000's 3,022 617 602 0 0 22 0 - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 08/31/2016 Next Release Date: 09/30/2016 Referring Pages: U.S.

  17. Electrochemical performance studies of MnO{sub 2} nanoflowers recovered from spent battery

    SciTech Connect (OSTI)

    Ali, Gomaa A.M.; Tan, Ling Ling; Jose, Rajan; Yusoff, Mashitah M.; Chong, Kwok Feng

    2014-12-15

    Highlights: MnO{sub 2} is recovered from spent zinccarbon batteries as nanoflowers structure. Recovered MnO{sub 2} nanoflowers show high specific capacitance. Recovered MnO{sub 2} nanoflowers show stable electrochemical cycling up to 900 cycles. Recovered MnO{sub 2} nanoflowers show low resistance in EIS data. - Abstract: The electrochemical performance of MnO{sub 2} nanoflowers recovered from spent household zinccarbon battery is studied by cyclic voltammetry, galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. MnO{sub 2} nanoflowers are recovered from spent zinccarbon battery by combination of solution leaching and electrowinning techniques. In an effort to utilize recovered MnO{sub 2} nanoflowers as energy storage supercapacitor, it is crucial to understand their structure and electrochemical performance. X-ray diffraction analysis confirms the recovery of MnO{sub 2} in birnessite phase, while electron microscopy analysis shows the MnO{sub 2} is recovered as 3D nanostructure with nanoflower morphology. The recovered MnO{sub 2} nanoflowers exhibit high specific capacitance (294 F g{sup ?1} at 10 mV s{sup ?1}; 208.5 F g{sup ?1} at 0.1 A g{sup ?1}) in 1 M Na{sub 2}SO{sub 4} electrolyte, with stable electrochemical cycling. Electrochemical data analysis reveal the great potential of MnO{sub 2} nanoflowers recovered from spent zinccarbon battery in the development of high performance energy storage supercapacitor system.

  18. Photoionization-pumped, Ne II, x-ray laser studies project. Final report

    SciTech Connect (OSTI)

    Richardson, M.C.; Hagelstein, P.L.; Eckart, M.J.; Forsyth, J.M.; Gerrassimenko, M.; Soures, J.M.

    1984-01-01

    The energetics of this pumping scheme are shown. Short-pulse (50 to 100 ps) laser irradiation of an appropriate x-ray flashlamp medium generates broad-band emission in the range of 300 to 800 eV which preferentially photoionizes Ne to the /sup 2/S state of Ne II creating an inversion at approximately 27 eV. Although this approach does not depend on precise spectral overlap between the x-ray pump radiation and the medium to be pumped, it does require that the x-ray medium remain un-ionized prior to photoionization by the soft x-ray emission. Well-controlled focus conditions are required to ensure that the x-ray medium is not subjected to electron or x-ray preheat prior to irradiation by the soft x-ray source. The magnitude of the population inversion is predicted to be critically dependent upon rapid photoionization of the two states; therefore, ultra-short pulse irradiation of the laser flashlamps is required.

  19. OZONE PRODUCTION IN THE PHILADELPHIA URBAN AREA DURING NE-OPS 99.

    SciTech Connect (OSTI)

    KLEINMAN,L.I.; DAUM,P.H.; BRECHTEL,F.; LEE,Y.N.; NUNNERMACKER,L.J.; SPRINGSTON,S.R.; WEINSTEIN-LLOYD,J.

    2001-10-01

    As part of the 1999 NARSTO Northeast Oxidant and Particulate Study (NE-OPS) field campaign, the DOE G-1 aircraft sampled trace gases and aerosols in and around the Philadelphia metropolitan area. Twenty research flights were conducted between July 25 and August 11. The overall goals of these flights were to obtain a mechanistic understanding of O{sub 3} production; to characterize the spatial and temporal behavior of photo-oxidants and aerosols; and to study the evolution of aerosol size distributions, including the process of new particle formation. Within the NE-OPS program, other groups provided additional trace gas, aerosol, and meteorological observations using aircraft, balloon, remote sensing, and surface based instruments (Phillbrick et al., 2000). In this article we provide an overview of the G-1 observations related to O{sub 3} production, focusing on the vertical distribution of pollutants. Ozone production rates are calculated using a box model that is constrained by observed trace gas concentrations. Highest O{sub 3} concentrations were observed on July 31, which we present as a case study. On that day, O{sub 3} concentrations above the 1-hour 120 ppb standard were observed downwind of Philadelphia and also in the plume of a single industrial facility located on the Delaware River south of the city.

  20. Liquid Argon Dielectric Breakdown Studies with the MicroBooNE Purification System

    SciTech Connect (OSTI)

    Acciarri, R.; Carls, B.; James, C.; Johnson, B.; Jostlein, H.; Lockwitz, S.; Lundberg, B.; Raaf, J. L.; Rameika, R.; Rebel, B.; Zeller, G. P.; Zuckerbrot, M.

    2014-11-04

    The proliferation of liquid argon time projection chamber detectors makes the characterization of the dielectric properties of liquid argon a critical task. To improve understanding of these properties, a systematic study of the breakdown electric field in liquid argon was conducted using a dedicated cryostat connected to the MicroBooNE cryogenic system at Fermilab. An electrode sphere-plate geometry was implemented using spheres with diameters of 1.3 mm, 5.0 mm, and 76 mm. The MicroBooNE cryogenic system allowed measurements to be taken at a variety of electronegative contamination levels ranging from a few parts-per-million to tens of parts-per-trillion. The cathode-anode distance was varied from 0.1 mm to 2.5 cm. The results demonstrate a geometric dependence of the electric field strength at breakdown. This study is the first time that the dependence of the breakdown field on stressed cathode area has been shown for liquid argon.

  1. Lattice Mn3+ Behaviors in Li4Ti5O12/LiNi0.5Mn1.5O4 Full Cells

    SciTech Connect (OSTI)

    Zheng, Jianming; Xiao, Jie; Nie, Zimin; Zhang, Jiguang

    2013-05-28

    High voltage spinels LiNi0.5Mn1.5O4 (LNMO) with different contents of residual Mn3+ ions have been evaluated in full cells using Li4Ti5O12 (LTO) as standard anode. Greatly improved cycling stability has been observed for all spinels in LTO-limited full cell, compared with those in LNMO-limited ones, while the underlying mechanisms are quite different. It has been discovered that the participation of active Mn3+ in the extended cycling and thus its observable contribution to Li+ diffusion kinetics depend on the limiting electrode and the sufficiency of Li+ ions. Potential Mn dissolution has also been discussed to identify the key factors that need to be considered to construct full cells employing high voltage spinel as the cathode.

  2. Wave packet and statistical quantum calculations for the He + NeH{sup +} → HeH{sup +} + Ne reaction on the ground electronic state

    SciTech Connect (OSTI)

    Koner, Debasish; Panda, Aditya N.; Barrios, Lizandra; González-Lezana, Tomás

    2014-09-21

    A real wave packet based time-dependent method and a statistical quantum method have been used to study the He + NeH{sup +} (v, j) reaction with the reactant in various ro-vibrational states, on a recently calculated ab initio ground state potential energy surface. Both the wave packet and statistical quantum calculations were carried out within the centrifugal sudden approximation as well as using the exact Hamiltonian. Quantum reaction probabilities exhibit dense oscillatory pattern for smaller total angular momentum values, which is a signature of resonances in a complex forming mechanism for the title reaction. Significant differences, found between exact and approximate quantum reaction cross sections, highlight the importance of inclusion of Coriolis coupling in the calculations. Statistical results are in fairly good agreement with the exact quantum results, for ground ro-vibrational states of the reactant. Vibrational excitation greatly enhances the reaction cross sections, whereas rotational excitation has relatively small effect on the reaction. The nature of the reaction cross section curves is dependent on the initial vibrational state of the reactant and is typical of a late barrier type potential energy profile.

  3. Magnetic and structural properties of Zn doped MnV{sub 2}O{sub 4}

    SciTech Connect (OSTI)

    Shahi, Prashant; Shukla, K. K.; Singh, Rahul; Chatterjee, Sandip; Das, A.; Ghosh, A. K.; Nigam, A. K.

    2014-04-24

    The magnetization, Neutron diffraction and X-ray diffraction of Zn doped MnV{sub 2}O{sub 4} as a function of temperature have been measured. It has been observed, with increase of Zn the non-linear orientation of Mn spins with the V spins will decrease which effectively decrease the structural transition temperature more rapidly than Curie Temperature.

  4. Spin correlations and electron transport in MnBi:Au films

    SciTech Connect (OSTI)

    Kharel, P.; Skomski, R.; Sellmyer, D. J.

    2011-04-01

    The structural, magnetic, and electron transport properties of Mn{sub 55-x}Au{sub x}Bi{sub 45} (x = 0, 4.5) thin films prepared by magnetron sputtering have been investigated. The magnetization of the MnBi films decreases and the coercivity increases due to Au doping. The temperature dependence of resistivity between 2 to 300 K shows that the films are metallic but the 4.5% Au-doped film shows a Kondo behavior with resistance minimum at 10.2 K. The magnetoresistance is anisotropic and the positive transverse magnetoresistance is significantly enhanced (16.3% at 70 kOe) by Au doping. We interpret these data in terms of a model in which Au atoms preferentially substitute for Mn atoms on the Mn lattice, and some Mn atoms are displaced to interstitial sites in the NiAs structure. These interstitial Mn atoms are coupled antiferromagnetically to the Mn atoms on the original Mn lattice leading to the large decrease in magnetization, Kondo effect, and the positive magnetoresistance.

  5. Room temperature spin-polarizations of Mn-based antiferromagnetic nanoelectrodes

    SciTech Connect (OSTI)

    Yamada, Toyo Kazu; Vazquez de Parga, Amadeo L.

    2014-11-03

    Antiferromagnets produce no stray field, and therefore, a tip electrode made of antiferromagnetic material has been considered to be the most suitable choice to measure such as magnetoresistance (MR) through single isolated magnetic nanoparticles, molecules, and ultrathin films. Spin polarizations (P) of antiferromagnetic 3-nm, 6-nm, and annealed 3-nm Mn films grown on W tips with a bcc(110) apex as well as bulk-NiMn tips were obtained at 300?K by measuring MR in ultrahigh vacuum by means of spin-polarized scanning tunneling microscopy using a layerwise antiferromagnetically stacking bct-Mn(001) film electrode. The Mn-coated tips with coverages of 3 and 6?nm exhibited P values of 1??1% and 3??2%, respectively, which tips likely contain ?- or strained Mn. With a thermal assist, the crystalline quality and the magnetic stability of the film could increase. The annealed tip exhibited P?=?9??2%. The bulk-NiMn tips exhibit spin polarizations of 0 or 6??2% probably depending on the chemical species (Mn or Ni) present at the apex of the tip. Fe-coated W tips were used to estimate the bct-Mn(001) film spin polarization.

  6. Site Determination and Magnetism of Mn Doping in Protein Encapsulated Iron Oxide Nanoparticles

    SciTech Connect (OSTI)

    Pool, V.; Klem, M.; Jolley, J.; Arenholz, E.A.; Douglas, T.; Young, M.; Idzerda, Y.U.

    2010-01-11

    Soft-X-ray absorption spectroscopy, soft-X-ray magnetic circular dichroism, and alternating current magnetic susceptibility were performed on 6.7 nm iron oxide nanoparticles doped with (5-33%) Mn grown inside the horse-spleen ferritin protein cages and compared to similarly protein encapsulated pure Fe-oxide and Mn-oxide nanoparticles to determine the site of the Mn dopant and to quantify the magnetic behavior with varying Mn concentration. The Mn dopant is shown to substitute preferentially as Mn{sup +2} and prefers the octahedral site in the defected spinel structure. The Mn multiplet structure for the nanoparticles is simpler than for the bulk standards, suggesting that the nanoparticle lattices are relaxed from the distortions present in the bulk. Addition of Mn is found to alter the host Fe-oxide lattice from a defected ferrimagnetic spinel structure similar to {gamma}-Fe{sub 2}O{sub 3} to an non-ferromagnetic spinel structure with a local Fe environment similar to Fe{sub 3}O{sub 4}.

  7. Impedance studies of the thin film LiMn2O4/electrolyteinterface

    SciTech Connect (OSTI)

    Striebel, Kathryn A.; Sakai, E.; Cairns, Elton J.

    2001-04-07

    Room-temperature impedance measurements of a thin-film LiMn2O4/LiPF6-EC-DMC interface have been used to identify the spontaneous formation Li2Mn2O4 at the interface at room temperature at voltages of 3.7 and higher. The impedance of the LiMn2O4 films exhibited two time constants: at about 14 kHz and 60 to 200 Hz. The high frequency loop is dependent on film morphology and was attributed to the substrate/oxide interface. The low frequency behavior was dependent on both state-of-charge (SOC) and time at a given SOC. At full charge the impedance in this electrolyte was stable at room temperature over several days. At high lithium contents, film OCV and impedance tended to grow logarithmically with time, with lower rates for lower Mn3+ content in the film. The increased impedance was removed by oxidation of the film to 4.5V vs. Li/Li+. The observations are consistent with a reversible disproportionation of part of the LiMn2O4 into Li2Mn2O4 and a lithium-deficient spinel. With extended constant current cycling part of the Li2Mn2O4 degrades to the Mn2O3 and the process is no longer reversible.

  8. Electric-Field Modulation of Curie Temperature in (Ga, Mn)As Field-Effect Transistor Structures with Varying Channel Thickness and Mn Compositions

    SciTech Connect (OSTI)

    Nishitani, Y.; Endo, M.; Chiba, D.; Matsukura, F.; Ohno, H.

    2010-01-04

    We have investigated the change of T{sub C} of ferromagnetic semiconductor (Ga, Mn)As by changing hole concentration p. The field effect transistor structure was utilized to change p. The relation T{sub C}propor top{sup 0.2} is obtained for three samples, despite the difference of their Mn composition and thickness, indicating that the relation holds over 2 decades of p.

  9. K and Mn co-doped BaCd{sub 2}As{sub 2}: A hexagonal structured...

    Office of Scientific and Technical Information (OSTI)

    K and Mn co-doped BaCdsub 2Assub 2: A hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance Citation Details In-Document Search Title: K and Mn ...

  10. Scanning tunneling microscopy reveals LiMnAs is a room temperature anti-ferromagnetic semiconductor

    SciTech Connect (OSTI)

    Wijnheijmer, A. P.; Koenraad, P. M.; Marti, X.; Holy, V.; Cukr, M.; Novak, V.; Jungwirth, T.

    2012-03-12

    We performed scanning tunneling microscopy and spectroscopy on a LiMnAs(001) thin film epitaxially grown on an InAs(001) substrate by molecular beam epitaxy. While the in situ cleavage exposed only the InAs(110) non-polar planes, the cleavage continued into the LiMnAs thin layer across several facets. We combined both topography and current mappings to confirm that the facets correspond to LiMnAs. By spectroscopy we show that LiMnAs has a band gap. The band gap evidenced in this study, combined with the known Neel temperature well above room temperature, confirms that LiMnAs is a promising candidate for exploring the concepts of high temperature semiconductor spintronics based on antiferromagnets.

  11. Magnetic properties and photoabsorption of the Mn-doped CeO{sub 2} nanorods

    SciTech Connect (OSTI)

    Xia, Chuanhui; Science College of Chongqing Jiaotong University, Chongqing 400074 ; Hu, Chenguo; Chen, Peng; Wan, Buyong; He, Xiaoshan; Tian, Yongshu; Chongqing Communication College, Chongqing 400035

    2010-07-15

    Mn-doped CeO{sub 2} nanorods have been prepared from CeO{sub 2} particles through a facile composite-hydroxide-mediated (CHM) approach. The analysis from X-ray photoelectron spectroscopy indicates that the manganese doped in CeO{sub 2} exists as Mn{sup 2+}. The magnetic measurement of the Mn-doped CeO{sub 2} nanorods exhibits an enhanced ferromagnetic property at room temperature with a remanence magnetization (Mr) of 1.36 x 10{sup -3} emu/g and coercivity (Hc) of 22 Oe. Comparative UV-visible spectra reveal the shift of the absorption peak of the CeO{sub 2} from ultraviolet region to visible light region after being doped with Mn. The room temperature ferromagnetic properties and light absorption of the Mn-doped CeO{sub 2} nanorods would have potential applications in photocatalysis and building of photovoltaic devices.

  12. Giant atomic displacement at a magnetic phase transition in metastable Mn3O4

    SciTech Connect (OSTI)

    Hirai, Shigeto; Moreira Dos Santos, Antonio F; Shapiro, Max C; Molaison, Jamie J; Pradhan, Neelam; Guthrie, Malcolm; Tulk, Christopher A; Fisher, Ian R; Mao, Wendy

    2013-01-01

    We present x-ray, neutron scattering, and heat capacity data that reveal a coupled first-order magnetic and structural phase transition of the metastable mixed-valence postspinel compound Mn3O4 at 210 K. Powder neutron diffraction measurements reveal a magnetic structure in which Mn3+ spins align antiferromagnetically along the edge-sharing a axis, with a magnetic propagation vector k = [1/2,0,0]. In contrast, the Mn2+ spins, which are geometrically frustrated, do not order until a much lower temperature. Although the Mn2+ spins do not directly participate in the magnetic phase transition at 210 K, structural refinements reveal a large atomic shift at this phase transition, corresponding to a physical motion of approximately 0.25 angstrom, even though the crystal symmetry remains unchanged. This "giant" response is due to the coupled effect of built-in strain in the metastable postspinel structure with the orbital realignment of the Mn3+ ion.

  13. QSO ABSORPTION SYSTEMS DETECTED IN Ne VIII: HIGH-METALLICITY CLOUDS WITH A LARGE EFFECTIVE CROSS SECTION

    SciTech Connect (OSTI)

    Meiring, J. D.; Tripp, T. M. [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)] [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Werk, J. K.; Prochaska, J. X. [University of California Observatories-Lick Observatory, UC Santa Cruz, CA 95064 (United States)] [University of California Observatories-Lick Observatory, UC Santa Cruz, CA 95064 (United States); Howk, J. C. [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States)] [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States); Jenkins, E. B. [Princeton University Observatory, Peyton Hall, Ivy Lane, Princeton, NJ 08544 (United States)] [Princeton University Observatory, Peyton Hall, Ivy Lane, Princeton, NJ 08544 (United States); Lehner, N.; Sembach, K. R. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)] [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)

    2013-04-10

    Using high-resolution, high signal-to-noise ultraviolet spectra of the z{sub em} = 0.9754 quasar PG1148+549 obtained with the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope, we study the physical conditions and abundances of Ne VIII+O VI absorption line systems at z{sub abs} = 0.68381, 0.70152, 0.72478. In addition to Ne VIII and O VI, absorption lines from multiple ionization stages of oxygen (O II, O III, O IV) are detected and are well aligned with the more highly ionized species. We show that these absorbers are multiphase systems including hot gas (T Almost-Equal-To 10{sup 5.7} K) that produces Ne VIII and O VI, and the gas metallicity of the cool phase ranges from Z = 0.3 Z{sub Sun} to supersolar. The cool ( Almost-Equal-To 10{sup 4} K) phases have densities n{sub H} Almost-Equal-To 10{sup -4} cm{sup -3} and small sizes (<4 kpc); these cool clouds are likely to expand and dissipate, and the Ne VIII may be within a transition layer between the cool gas and a surrounding, much hotter medium. The Ne VIII redshift density, dN/dz{approx}7{sup +7}{sub -3}, requires a large number of these clouds for every L > 0.1 L* galaxy and a large effective absorption cross section ({approx}> 100 kpc), and indeed, we find a star-forming {approx}L {sup *} galaxy at the redshift of the z{sub abs} = 0.72478 system, at an impact parameter of 217 kpc. Multiphase absorbers like these Ne VIII systems are likely to be an important reservoir of baryons and metals in the circumgalactic media of galaxies.

  14. Prospective benefits analysis of the DOE Nuclear Energy portfolio: NE R&D program data assumptions, approach, & results

    SciTech Connect (OSTI)

    Bhatt, Vatsal; Friley, Paul; Lee, John; Reisman, Ann

    2006-10-31

    The Office of Nuclear Energy (NE) leads the U.S. Government’s efforts to develop new nuclear energy generation technologies to meet energy and climate goals, and to develop advanced proliferation-resistant nuclear fuel technologies that maximize energy from nuclear fuel; contributes to the R&D for a possible transition to a hydrogen economy; and maintains and enhances the national nuclear technology infrastructure. NE serves the present and future energy needs of the Nation by managing the safe operation and maintenance of the Department of Energy (DOE) critical nuclear in frastructure, providing nuclear technology goods and services, and conducting R&D.

  15. New Results from MiniBooNE Charged-Current Quasi-Elastic Anti-Neutrino Data

    SciTech Connect (OSTI)

    Grange, Joseph

    2011-07-01

    MiniBooNE anti-neutrino charged-current quasi-elastic (CCQE) data is compared to model predictions. The main background of neutrino-induced events is examined first, where three independent techniques are employed. Results indicate the neutrino flux is consistent with a uniform reduction of {approx}20% relative to the largely uncertain prediction. After background subtraction, the Q{sup 2} shape of {bar v}{sub {mu}} CCQE events is consistent with the model parameter MA = 1.35 GeV determined from MiniBooNE v{sub {mu}} CCQE data, while the normalization is {approx} 20% high compared to the same prediction.

  16. Ferromagnetic (Ga,Mn)As nanostructures for spintronic applications

    SciTech Connect (OSTI)

    Wosinski, Tadeusz; Andrearczyk, Tomasz; Figielski, Tadeusz; Makosa, Andrzej; Wrobel, Jerzy; Sadowski, Janusz

    2013-12-04

    Magneto-resistive, cross-like nanostructures have been designed and fabricated by electron-beam lithography patterning and chemical etching from thin epitaxial layers of the ferromagnetic semiconductor (Ga,Mn)As. The nanostructures, composed of two perpendicular nanostripes crossing in the middle of their length, represent four-terminal devices, in which an electric current can be driven through any of the two nanostripes. In these devices, a novel magneto-resistive memory effect, related to a rearrangement of magnetic domain walls in the central part of the device, has been demonstrated. It consists in that the zero-field resistance of a nanostripe depends on the direction of previously applied magnetic field. The nanostructures can thus work as two-state devices providing basic elements of nonvolatile memory cells.

  17. Test of ''Crab-Waist'' Collisions at the DA{Phi}NE {Phi} Factory

    SciTech Connect (OSTI)

    Zobov, M.; Alesini, D.; Biagini, M. E.; Biscari, C.; Bocci, A.; Boni, R.; Boscolo, M.; Bossi, F.; Buonomo, B.; Clozza, A.; Delle Monache, G. O.; Demma, T.; Di Pasquale, E.; Di Pirro, G.; Drago, A.; Gallo, A.; Ghigo, A.; Guiducci, S.; Ligi, C.; Marcellini, F.

    2010-04-30

    The electron-positron collider DA{Phi}NE, the Italian {Phi} factory, has been recently upgraded in order to implement an innovative collision scheme based on large crossing angle, small beam sizes at the crossing point, and compensation of beam-beam interaction by means of sextupole pairs creating a ''crab-waist'' configuration in the interaction region. Experimental tests of the novel scheme exhibited an increase by a factor of 3 in the peak luminosity of the collider with respect to the performances reached before the upgrade. In this Letter we present the new collision scheme, discuss its advantages, describe the hardware modifications realized for the upgrade, and report the results of the experimental tests carried out during commissioning of the machine in the new configuration and standard operation for the users.

  18. AmeriFlux US-Ne3 Mead - rainfed maize-soybean rotation site

    SciTech Connect (OSTI)

    Suyker, Andy

    2016-01-01

    This is the AmeriFlux version of the carbon flux data for the site US-Ne3 Mead - rainfed maize-soybean rotation site. Site Description - The study site is one of three fields (all located within 1.6 km of each other) at the University of Nebraska Agricultural Research and Development Center near Mead, Nebraska. While the other two sites are equipped with irrigation systems, this site relies on rainfall. A tillage operation (disking) was done just prior to the 2001 planting to homogenize the top 0.1 m of soil, incorporate P and K fertilizers, as well as previously accumulated surface residues. Since initiation of the study in 2001, this site has been under no-till management.

  19. AmeriFlux US-Ne2 Mead - irrigated maize-soybean rotation site

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Suyker, Andy [University of Nebraska - Lincoln

    2016-01-01

    This is the AmeriFlux version of the carbon flux data for the site US-Ne2 Mead - irrigated maize-soybean rotation site. Site Description - The study site is one of three fields (all located within 1.6 km of each other) at the University of Nebraska Agricultural Research and Development Center near Mead, Nebraska. This site is irrigated with a center pivot system. Prior to the initiation of the study, the irrigated site had a 10-yr history of maize-soybean rotation under no-till. A tillage operation (disking) was done just prior to the 2001 planting to homogenize the top 0.1 m of soil, incorporate P and K fertilizers, as well as previously accumulated surface residues. Since this tillage operation, the site has been under no-till management.

  20. MiniBooNE NC 1π0 Cross Section Data Release

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    νμ and ν̅μ induced neutral current single π0 production cross sections on mineral oil at Eν~O(1 GeV)", arXiv:0911.2063 [hep-ex], Phys. Rev. D81, 013005 (2010) The following MiniBooNE information from the 2009 NC 1π0 cross section paper is made available to the public: Neutrino Mode Running νμ NC 1π0 pπ0 Differential Cross Section 1D array of bin boundaries partitioning the momentum of the π0 1D array of the value of the differential cross section in each bin in units of 10-40

  1. Effect of supplementation on vitamin A and zinc nutriture of children in northeast (NE) Thailand

    SciTech Connect (OSTI)

    Udomkesmalee, E.; Dhanamitta, S.; Charoenklatkul, S.; Tantipopipat, S.; Banjong, O.; Rojroongwasinkul, N.; Kramer, T.R.; Smith, J.C. Jr. USDA, Beltsville, MD )

    1991-03-11

    Previous surveys of the nutritional status of young children in NE Thailand suggested that they may benefit from vitamin A (VA) and/or zinc (Zn) supplementation. 140 children, with low plasma retinol concentrations were entered in a double-blind study. They were randomized and supplemented with either VA, Zn, VA + Zn or placebo each weekday for 6 mos. All subjects consumed their usual diet that provided adequate protein, less than recommended calories, fat, Zn and VA. Biochemical indices of VA and Zn status increased significantly. The children had adequate VA liver stores as assessed by relative dose response. Zn supplementation resulted in improvement of vision restoration time in dim light using rapid dark adaptometry. VA and Zn synergistically normalized conjunctival epithelium after a 6 mo supplementation. Data suggest that functional improvements of populations with suboptimal VA and Zn nutriture can be accomplished by supplementation with {lt}2 times of RDA of these nutrients.

  2. Impedance analysis of MnCoCuO NTC ceramic

    SciTech Connect (OSTI)

    Song, S.G. . E-mail: song-ph0@wpmail.paisley.ac.uk; Ling, Z.; Placido, F.

    2005-07-12

    Impedance spectroscopy is often used to analyse the electrical properties of ceramic materials having high-resistive grain boundaries, such as ZnO and SrTiO{sub 3}. Fewer attempts have been made at using this technique for the analysis of inhomogeneous electronic ceramics consisting of grains with differing composition, such as those occurring in negative temperature coefficient (NTC) thermistors. In this study, we have attempted to adopt ac impedance spectroscopy together with other techniques to analyse an NTC thermistor ceramic material. An Mn, Co and Cu multielements transition metal oxide (MnCoCuO) ceramic was prepared by using homogeneous precipitation employing oxalic acid. This material displayed a typical NTC effect, showing an electrical resistance decrease with temperature when dc electrical measurement was performed. The ac impedance spectroscopy analysis showed that there were two peaks in impedance and conductance versus frequency plot. By using an alternative representation of impedance spectra Z'/f versus Z', three distinct relaxation frequency ranges were identified. They are believed to originate, respectively, from the electrode, phase 1 (rich-Cu phase) and phase 2 (poor-Cu phase) grains existing in this ceramic. SEM observation and EDX analysis clearly showed existence of two distinct phase grains. The resistance values were derived from phases 1 and 2 grains based on ac impedance data. The sum of the resistance values was in good agreement with that from dc measurement in the temperature range of 30-95 deg. C. The material constant, B, for the two phases was also calculated, giving 3100 and 3600 K for phases 1 and 2, respectively.

  3. Ab initio study of Fe{sub 2}MnZ (Al, Si, Ge) Heusler alloy using GGA approximation

    SciTech Connect (OSTI)

    Jain, Vivek Kumar Jain, Vishal Lakshmi, N. Venugopalan, K.

    2014-04-24

    Density functional theory based on FP-LAPW method used to investigate the electronic structure of Fe{sub 2}MnZ, shows that the total spin magnetic moment shows a trend consistent with the Slater–Pauling curve. The Fe and Mn magnetic moment depend on choice of Z element although the magnetic moment of Z element is negative and less than 0.1 μ{sub B}. Spin polarization calculations evidence 100% spin polarization for Fe{sub 2}MnSi. Fe{sub 2}MnAl and Fe{sub 2}MnGe show metallic behavior with 93%, 98% spin polarization.

  4. Quantum Anomalous Hall Effect in Hg_1-yMn_yTe Quantum Wells

    SciTech Connect (OSTI)

    Liu, Chao-Xing; Qi, Xiao-Liang; Dai, Xi; Fang, Zhong; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.

    2010-03-19

    The quantum Hall effect is usually observed when the two-dimensional electron gas is subjected to an external magnetic field, so that their quantum states form Landau levels. In this work we predict that a new phenomenon, the quantum anomalous Hall effect, can be realized in Hg{sub 1-y}Mn{sub y}Te quantum wells, without the external magnetic field and the associated Landau levels. This effect arises purely from the spin polarization of the Mn atoms, and the quantized Hall conductance is predicted for a range of quantum well thickness and the concentration of the Mn atoms. This effect enables dissipationless charge current in spintronics devices.

  5. Recent progress of magnetocaloric effect and magnetic refrigerant materials of Mn compounds (invited)

    SciTech Connect (OSTI)

    Wada, H. Takahara, T.; Katagiri, K.; Ohnishi, T.; Soejima, K.; Yamashita, K.

    2015-05-07

    Magnetocaloric and related properties of Ru and Ni substituted (MnFe){sub 2}(PSi) are presented. It is found that Ru and Ni are effective doping elements to reduce the thermal hysteresis of (MnFe){sub 2}(PSi). The origin of the thermal hysteresis is discussed on the basis of a thermodynamic model. It is shown that the elastic energy is responsible for the thermal hysteresis. We also show recent developments of the production process of Mn compounds in an industrial scale.

  6. Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

    SciTech Connect (OSTI)

    Maniraj, M.; D?Souza, S. W.; Rai, Abhishek; Schlagel, D. L.; Lograsso, T. A.; Chakrabarti, Aparna; Barman, S. R.

    2015-08-20

    Momentum resolved inverse photoemission spectroscopy measurements show that the dispersion of the unoccupied bands of Ni2MnGa is significant in the austenite phase. Furthermore, in the martensite phase, it is markedly reduced, which is possibly related to the structural transition to an incommensurate modulated state in the martensite phase. Finally, based on the first principle calculations of the electronic structure of NiMnGa, we show that the modification of the spectral shape with surface composition is related to change in the hybridization between the Mn 3d and Ni 3d-like states that dominate the unoccupied conduction band.

  7. Role of Cu-Ion Doping in Cu-α-MnO2 Nanowire Electrocatalysts for the Oxygen Reduction Reaction

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Davis, Danae J.; Lambert, Timothy N.; Vigil, Julian A.; Rodriguez, Mark A.; Brumbach, Michael T.; Coker, Eric N.; Limmer, Steven J.

    2014-07-09

    The role of Cu-ion doping in α-MnO2 electrocatalysts for the oxygen reduction reaction in alkaline electrolyte was investigated. Copper doped α-MnO2 nanowires (Cu-α-MnO2) were prepared with varying amounts of Cu2+ using a solvothermal method. The electrocatalytic dataindicates that Cu-α-MnO2 nanowires have higher terminal current densities, enhanced kinetic rate constants, and improved charge transfer resistances that trend with Cu-content, exceeding values attained by α-MnO2 alone. The observed improvement in catalytic behavior correlates with an increase in Mn3+ content for the Cu-α-MnO2 nanowires. The Mn3+/Mn4+ couple is themediator for the rate-limiting redox driven O2-/OH- exchange. It is proposed that O2 adsorbs viaanmore » axial site (the eg orbital on the Mn3+ d4 ion) at the surface, or at edge defects, of the nanowireand that the increase in covalent nature of the nanowire with Cu-ion doping leads to stabilization of O2 adsorbates and faster rates of reduction. This work is applicable to other manganese oxide electrocatalysts and shows for the first time there is a correlation for manganese oxides between electrocatalytic activity for the ORR in alkaline electrolyte and an increase in Mn3+ character of the oxide.« less

  8. Planar Hall effect in Y{sub 3}Fe{sub 5}O{sub 12}/IrMn films

    SciTech Connect (OSTI)

    Zhang, X. Zou, L. K.

    2014-12-29

    The planar Hall effect of IrMn on an yttrium iron garnet (YIG = Y{sub 3}Fe{sub 5}O{sub 12}) was measured in the magnetic field rotating in the film plane. The magnetic field angular dependence of planar Hall resistance (PHR) was observed in YIG/IrMn bilayer at different temperatures, while the Gd{sub 3}Ga{sub 5}O{sub 12}/IrMn film shows constant PHR for different magnetic field angles at both 10 K and 300 K. This provides evidence that IrMn has interfacial spins which can be led by ferrimagnetic layer in YIG/IrMn structure. A hysteresis can be observed in PHR-magnetic field angle loop of YIG/IrMn film at 10 K, indicative of the irreversible switching of IrMn interfacial spins at low temperature.

  9. First-principles study of spin-transfer torque in Co{sub 2}MnSi/Al/Co{sub 2}MnSi spin-valve

    SciTech Connect (OSTI)

    Tang, Ling Yang, Zejin

    2013-11-21

    The spin-transfer torque (STT) in Co{sub 2}MnSi(CMS)/Al/Co{sub 2}MnSi spin-valve system with and without interfacial disorder is studied by a first-principles noncollinear wave-function-matching method. It is shown that in the case of clean interface the angular dependence of STT for CoCo/Al (the asymmetry parameter Λ≈4.5) is more skewed than that for MnSi/Al (Λ≈2.9), which suggests the clean CoCo/Al architecture is much more efficient for the application on radio frequency oscillation. We also find that even with interfacial disorder the spin-valve of half-metallic CMS still has a relatively large parameter Λ compared to that of conventional ferromagnet. In addition, for clean interface the in-plane torkance of MnSi/Al is about twice as large as that of CoCo/Al. However, as long as the degree of interfacial disorder is sufficiently large, the CoCo/Al and MnSi/Al will show approximately the same magnitude of in-plane torkance. Furthermore, our results demonstrate that CMS/Al/CMS system has very high efficiency of STT to switch the magnetic layer of spin-valve.

  10. File:USDA-CE-Production-GIFmaps-MN.pdf | Open Energy Information

    Open Energy Info (EERE)

    MN.pdf Jump to: navigation, search File File history File usage Minnesota Ethanol Plant Locations Size of this preview: 776 600 pixels. Full resolution (1,650 1,275...

  11. Unoccupied electronic structure of Ni2MnGa ferromagnetic shape...

    Office of Scientific and Technical Information (OSTI)

    shape memory alloy This content will become publicly available on August 20, 2016 Prev Next Title: Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy ...

  12. Microstructure and Mechanical Properties of Two-Phase Fe30Ni20Mn20Al30...

    Office of Scientific and Technical Information (OSTI)

    Title: Microstructure and Mechanical Properties of Two-Phase Fe30Ni20Mn20Al30 Alloy Authors: Wu, Xiaolan 1 ; Baker, Ian 1 ; Wu, H 1 ; Miller, Michael K 2 ; More, Karren ...

  13. Magnetocaloric effect of Pr2Fe17-x Mn x alloys (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Search Results Journal Article: Magnetocaloric effect of Pr2Fe17-x Mn x ... OSTI Identifier: 1221829 Report Number(s): IS-J 8426 Journal ID: ISSN 1001-0521; PII: 134 ...

  14. Effect of Mn substitution on the transport properties of co-sputtered...

    Office of Scientific and Technical Information (OSTI)

    on the transport properties of co-sputtered Fesub 3-xMnsub xSi epilayers Citation Details In-Document Search Title: Effect of Mn substitution on the transport properties of ...

  15. X-Ray Spectroscopy of the Mn(4) Ca Cluster in the Water-Oxidation...

    Office of Scientific and Technical Information (OSTI)

    Ca Cluster in the Water-Oxidation Complex of Photosystem II Citation Details In-Document Search Title: X-Ray Spectroscopy of the Mn(4) Ca Cluster in the Water-Oxidation Complex ...

  16. Electrochemical Performances of LiMnPO4 Synthesized from Non...

    Office of Scientific and Technical Information (OSTI)

    Li1.1MnPO4 exhibits the most stable cycling ability probably because of the existence of a trace amount of Li3PO4 impurity that functions as a solid-state electrolyte on...

  17. Spectroscopic properties of (PVA+ZnO):Mn{sup 2+} polymer films

    SciTech Connect (OSTI)

    Rani, Ch.; Raju, D. Siva; Bindu, S. Hima; Krishna, J. Suresh; Raju, Ch. Linga

    2015-05-15

    Electron Paramagnetic Resonance (EPR), optical absorption and infrared spectral studies have been carried out on Mn{sup 2+} ions doped in poly(vinyl alcohol) complexed with zinc oxide polymer films prepared by solution cast technique. The EPR spectra of 1 mol% Mn{sup 2+} ions doped polymer complex (PVA+ZnO) at room temperature exhibit sextet hyperfine structure (hfs), centered at 2.01. The spin-Hamiltonian parameter values indicate that the ground state of Mn{sup 2+} ion in d{sup 5} and the site symmetry around Mn{sup 2+} ions in tetragonally distorted octa hedral site. The optical absorption spectra exhibits two bands centered at 275nm at 437nm. The FTIR spectrum exhibits bands characteristic of stretching and banding vibrations of O-H, C-H and C=C groups.

  18. Modeling and Characterization of the Magnetocaloric Effect in Ni2MnGa Materials

    SciTech Connect (OSTI)

    Nicholson, Don M; Odbadrakh, Khorgolkhuu; Rios, Orlando; Hodges, Jason P; Ludtka, Gerard Michael; Porter, Wallace D; Sefat, A. S.; Rusanu, Aurelian; Evans III, Boyd Mccutchen

    2012-01-01

    Magnetic shape memory alloys have great promise as magneto-caloric effect refrigerant materials due to their combined magnetic and structural transitions. Computational and experimental research is reported on the Ni2MnGa material system. The magnetic states of this system have been explored using the Wang-Landau statistical approach in conjunction with the Locally Self-consistent Multiple-Scattering (LSMS) method to explore the magnetic states responsible for the magnet-caloric effect in this material. The effects of alloying agents on the transition temperatures of the Ni2MnGa alloy were investigated using differential scanning calorimetry (DSC) and superconducting quantum interference device (SQUID). Neutron scattering experiments were performed to observe the structural and magnetic phase transformations at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) on alloys of Ni-Mn-Ga and Ni-Mn-Ga-Cu-Fe. Data from the observations are discussed in comparison with the computational studies.

  19. In-situ Electrical Conductivity of LixMnO2 Nanowires as a Function...

    Office of Scientific and Technical Information (OSTI)

    of LixMnO2 Nanowires as a Function of "x" and Size Authors: Le, Mya ; Liu, Yu ; Wang, Hui ; Dutta, Rajen ; Yan, Wenbo ; Hemminger, John C ; Wu, Ruqian ; Penner, Reginald...

  20. Pressure-Induced Metallization of the Mott Insulator MnO (Journal...

    Office of Scientific and Technical Information (OSTI)

    Pressure-Induced Metallization of the Mott Insulator MnO Citation ... Publication Date: 2004-01-12 OSTI Identifier: 15013737 Report Number(s): UCRL-JRNL-201933 Journal ID: ISSN ...

  1. Synthesis and characterization of MnPS{sub 3} for hydrogen sorption

    SciTech Connect (OSTI)

    Ismail, N.; Temerk, Y.M.; El-Meligi, A.A.; Badr, M.A.; Madian, M.

    2010-05-15

    Single phase MnPS{sub 3} powder was prepared by solid state reaction between Mn, S and P carried out at 650 deg. C in evacuated silica tube. The structure, morphology and sorption characteristics of the prepared solid were investigated. The results revealed that the obtained MnPS{sub 3} compound was capable of adsorbing 3.5 wt% hydrogen at -193 deg. C and a pressure of 30 bar. Little amount of hydrogen (0.07 wt%) was adsorbed at room temperature. The hydrogen adsorption/desorption cycles at various temperatures did not result in irreversible chemical structural changes of the MnPS{sub 3} compound, but the microstructure after hydrogen cycling diminished and became finer. - Graphical abstract: Atomic building of MPS{sub 3}

  2. Demonstration Assessment of LED Roadway Lighting: NE Cully Boulevard Portland, OR

    SciTech Connect (OSTI)

    Royer, Michael P.; Poplawski, Michael E.; Tuenge, Jason R.

    2012-06-29

    A new roadway lighting demonstration project was initiated in late 2010, which was planned in conjunction with other upgrades to NE Cully Boulevard, a residential collector road in the northeast area of Portland, OR. With the NE Cully Boulevard project, the Portland Bureau of Transportation hoped to demonstrate different light source technologies and different luminaires side-by-side. This report documents the initial performance of six different newly installed luminaires, including three LED products, one induction product, one ceramic metal halide product, and one high-pressure sodium (HPS) product that represented the baseline solution. It includes reported, calculated, and measured performance; evaluates the economic feasibility of each of the alternative luminaires; and documents user feedback collected from a group of local Illuminating Engineering Society (IES) members that toured the site. This report does not contain any long-term performance evaluations or laboratory measurements of luminaire performance. Although not all of the installed products performed equally, the alternative luminaires generally offered higher efficacy, more appropriate luminous intensity distributions, and favorable color quality when compared to the baseline HPS luminaire. However, some products did not provide sufficient illumination to all areas—vehicular drive lanes, bicycle lanes, and sidewalks—or would likely fail to meet design criteria over the life of the installation due to expected depreciation in lumen output. While the overall performance of the alternative luminaires was generally better than the baseline HPS luminaire, cost remains a significant barrier to widespread adoption. Based on the cost of the small quantity of luminaires purchased for this demonstration, the shortest calculated payback period for one of the alternative luminaire types was 17.3 years. The luminaire prices were notably higher than typical prices for currently available luminaires

  3. Understanding the Structural and Electronic Evolution of Li2MnO3 During

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Electron Irradiation Via Electron Microscopy - Joint Center for Energy Storage Research November 17, 2014, Research Highlights Understanding the Structural and Electronic Evolution of Li2MnO3 During Electron Irradiation Via Electron Microscopy In-situ electron beam irradiation induces localized pockets of damage (a) and (b) characterized by the Mn atoms migrating to occupy Li sites, as shown in the annular bright field image of (c). This effect is clearly visible in an intensity line profile

  4. The role of C and Mn at the austenite/pearlite reaction front during non-steady-state pearlite growth in a Fe-C-Mn steel

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Aranda, M. M.; Rementeria, R.; Poplawsky, Jonathan D.; Urones-Garrote, E.; Capdevila, Carlos

    2015-04-18

    The role of C and Mn during the growth of pearlite under non-steady state conditions is analyzed by comparing the phase compositions of austenite, ferrite and cementite (γ+α+θ) through the use of transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), and atom probe tomography (APT) measurements across the austenite/pearlite interface. Furthermore, a local Mn enrichment and C depletion at the austenite/pearlite interface has been measured, which causes a change in the driving force with time during divergent pearlite growth.

  5. The structure of the Caenorhabditis elegans manganese superoxide dismutase MnSOD-3-azide complex

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hunter, Gary J.; Trinh, Chi H.; Bonetta, Rosalin; Stewart, Emma E.; Cabelli, Diane E.; Hunter, Therese

    2015-08-27

    C. elegans MnSOD-3 has been implicated in the longevity pathway and its mechanism of catalysis is relevant to the aging process and carcinogenesis. The structures of MnSOD-3 provide unique crystallographic evidence of a dynamic region of the tetrameric interface (residues 41–54). We have determined the structure of the MnSOD-3-azide complex to 1.77-Å resolution. The analysis of this complex shows that the substrate analog, azide, binds end-on to the manganese center as a sixth ligand and that it ligates directly to a third and new solvent molecule also positioned within interacting distance to the His30 and Tyr34 residues of the substratemore » access funnel. This is the first structure of a eukaryotic MnSOD-azide complex that demonstrates the extended, uninterrupted hydrogen-bonded network that forms a proton relay incorporating three outer sphere solvent molecules, the substrate analog, the gateway residues, Gln142, and the solvent ligand. This configuration supports the formation and release of the hydrogen peroxide product in agreement with the 5-6-5 catalytic mechanism for MnSOD. The high product dissociation constant k₄ of MnSOD-3 reflects low product inhibition making this enzyme efficient even at high levels of superoxide.« less

  6. Hydrothermal synthesis of Mn vanadate nanosheets and visible-light photocatalytic performance for the degradation of methyl blue

    SciTech Connect (OSTI)

    Pei, L.Z. Xie, Y.K.; Pei, Y.Q.; Jiang, Y.X.; Yu, H.Y.; Cai, Z.Y.

    2013-07-15

    Graphical abstract: - Highlights: Mn vanadate nanosheets have been synthesized by simple hydrothermal process. The formation of Mn vanadate nanosheets can be controlled by growth conditions. Mn vanadate nanosheets exhibit good photocatalytic activities for methyl blue. - Abstract: Mn vanadate nanosheets have been synthesized via a facile hydrothermal route using ammonium metavanadate and Mn acetate as the raw materials, polyvinyl pyrrolidone (PVP) as the surfactant. X-ray diffraction (XRD) shows that the Mn vanadate nanosheets are composed of monoclinic MnV{sub 2}O{sub 6} phase. Scanning electron microscopy (SEM) observation indicates that the nanosheets have the average thickness of about 50 nm, length of 210 ?m and width of 800 nm to 2 ?m. The growth process of the Mn vanadate nanosheets has also been discussed based on the analysis of the roles of the growth conditions on the formation of the Mn vanadate nanosheets. The nanosheets show good photocatalytic activities for the degradation of methylene blue (MB) under visible light irradiation. About 72.96% MB can be degraded after visible light irradiation for 1 h over 10 mg Mn vanadate nanosheets in 10 mL MB solution with the concentration of 10 mg L{sup ?1}.

  7. Preparation of state purified beams of He, Ne, C, N, and O atoms

    SciTech Connect (OSTI)

    Jankunas, Justin; Reisyan, Kevin S.; Osterwalder, Andreas

    2015-03-14

    The production and guiding of ground state and metastable C, N, and O atoms in a two-meter-long, bent magnetic guide are described. Pure beams of metastable He({sup 3}S{sub 1}) and Ne({sup 3}P{sub 2}), and of ground state N({sup 4}S{sub 3/2}) and O({sup 3}P{sub 2}) are obtained using an Even-Lavie valve paired with a dielectric barrier discharge or electron bombardment source. Under these conditions no electronically excited C, N, or O atoms are observed at the exit of the guide. A general valve with electron impact excitation creates, in addition to ground state atoms, electronically excited C({sup 3}P{sub 2}; {sup 1}D{sub 2}) and N({sup 2}D{sub 5/2}; {sup 2}P{sub 3/2}) species. The two experimental conditions are complimentary, demonstrating the usefulness of a magnetic guide in crossed or merged beam experiments such as those described in Henson et al. [Science 338, 234 (2012)] and Jankunas et al. [J. Chem. Phys. 140, 244302 (2014)].

  8. AmeriFlux US-Ne1 Mead - irrigated continuous maize site

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Suyker, Andy [University of Nebraska - Lincoln

    2016-01-01

    This is the AmeriFlux version of the carbon flux data for the site US-Ne1 Mead - irrigated continuous maize site. Site Description - The study site is one of three fields (all located within 1.6 km of each other) at the University of Nebraska Agricultural Research and Development Center near Mead, Nebraska. This site is irrigated with a center pivot system. Prior to the initiation of the study, the irrigated site had a 10-yr history of maize-soybean rotation under no-till. A tillage operation (disking) was done just prior to the 2001 planting to homogenize the top 0.1 m of soil, incorporate P and K fertilizers, as well as previously accumulated surface residues. Since the tillage operation, the site has been under no-till management until the harvest of 2005. Following harvest, a conservation-plow tillage operation was initiated where a small amount of N fertilizer is sprayed on the residue immediately prior to the plow operation. Approximately 1/3 of the crop residue is left on the surface. The post-harvest conservation-plow operation continues as the current practice.

  9. Influence of Mesozoic age structure on Miocene tectonic development in NE Anzoategui, Eastern Venezuela Basin

    SciTech Connect (OSTI)

    Sadler, P.; White, S.

    1996-08-01

    Structure within and surrounding the Quiamare-La Ceiba region, Eastern Venezuela Basin, is dominated by two major thrust fault systems. They were generated during Early-Middle Miocene time in response to oblique convergence of the Caribbean and South American plates. They are. respectively, the SE vergent NE-SW oriented Anaco fault system, and the SSE vergent ENE-WSW oriented Pirital fault system. The major structural feature associated with each fault system is a basement cored ramp anticline. New seismic data provides evidence that contributes to a better understanding of the sequence of tectonic development within and surrounding the Quiamare-La Ceiba region. Compressional structures in both the hanging wall and the footwall of the Pirital fault system appear to be inverted normal faults, that were previously active during Mesozoic time along the northern South America passive margin. A conjugate set of strike-slip faults is also present. They are oriented NNW-SSE, parallel to the Urica lineation, and SSW-NNE, respectively. A Mesozoic origin for these faults is suggested. Post-compressional relaxation during Plio-Pleistocene time resulted in the development of shallow, small scale normal faults. These normal faults appear to be localized by structural adjustments along the strike-slip fault sets. Existing oil and gas production within the Quiamare-La Ceiba region is from localized structural closures. Strike-slip faults dissect the prevailing structural grain, and may provide an additional hydrocarbon trapping mechanism.

  10. Inverse magnetocaloric effect in Mn{sub 2}NiGa and Mn{sub 1.75}Ni{sub 1.25}Ga magnetic shape memory alloys

    SciTech Connect (OSTI)

    Singh, Sanjay Barman, S. R.; Esakki Muthu, S.; Arumugam, S.; Senyshyn, A.; Rajput, P.; Suard, E.

    2014-02-03

    Inverse magnetocaloric effect is demonstrated in Mn{sub 2}NiGa and Mn{sub 1.75}Ni{sub 1.25}Ga magnetic shape memory alloys. The entropy change at the martensite transition is larger in Mn{sub 1.75}Ni{sub 1.25}Ga, and it increases linearly with magnetic field in both the specimens. Existence of inverse magnetocaloric effect is consistent with the observation that magnetization in the martensite phase is smaller than the austenite phase. Although the Mn content is smaller in Mn{sub 1.75}Ni{sub 1.25}Ga, from neutron diffraction, we show that the origin of inverse magnetocaloric effect is the antiferromagnetic interaction between the Mn atoms occupying inequivalent sites.

  11. High Level Requirements for the Nuclear Energy -- Knowledge Base for Advanced Modeling and Simulation (NE-KAMS)

    SciTech Connect (OSTI)

    Rich Johnson; Hyung Lee; Kimberlyn C. Mousseau

    2011-09-01

    The US Department of Energy, Office of Nuclear Energy (DOE-NE), has been tasked with the important mission of ensuring that nuclear energy remains a compelling and viable energy source in the U.S. The motivations behind this mission include cost-effectively meeting the expected increases in the power needs of the country, reducing carbon emissions and reducing dependence on foreign energy sources. In the near term, to ensure that nuclear power remains a key element of U.S. energy strategy and portfolio, the DOE-NE will be working with the nuclear industry to support safe and efficient operations of existing nuclear power plants. In the long term, to meet the increasing energy needs of the U.S., the DOE-NE will be investing in research and development (R&D) and working in concert with the nuclear industry to build and deploy new, safer and more efficient nuclear power plants. The safe and efficient operations of existing nuclear power plants and designing, licensing and deploying new reactor designs, however, will require focused R&D programs as well as the extensive use and leveraging of advanced modeling and simulation (M&S). M&S will play a key role in ensuring safe and efficient operations of existing and new nuclear reactors. The DOE-NE has been actively developing and promoting the use of advanced M&S in reactor design and analysis through its R&D programs, e.g., the Nuclear Energy Advanced Modeling and Simulation (NEAMS) and Consortium for Advanced Simulation of Light Water Reactors (CASL) programs. Also, nuclear reactor vendors are already using CFD and CSM, for design, analysis, and licensing. However, these M&S tools cannot be used with confidence for nuclear reactor applications unless accompanied and supported by verification and validation (V&V) and uncertainty quantification (UQ) processes and procedures which provide quantitative measures of uncertainty for specific applications. The Nuclear Energy Knowledge base for Advanced Modeling and Simulation

  12. Proposal of a new generation of Laser Beacon for time calibration in the KM3NeT neutrino telescope

    SciTech Connect (OSTI)

    Real, Diego [IFIC, Instituto de Fsica Corpuscular, CSIC-Universidad de Valencia, C Collaboration: KM3NeT Collaboration

    2014-11-18

    The KM3NeT collaboration aims at the construction of a multi-km3 high-energy neutrino telescope in the Mediterranean Sea consisting of a matrix of pressure resistant glass spheres holding each a set (31) of small area photomultipliers. The main motivation of the telescope is to observe cosmic neutrinos through the Cherenkov light induced in sea water by charged particles produced in neutrino interactions with the surrounding medium. A relative time calibration between photomultipliers of the order of 1 ns is required to achieve an optimal performance. To this end, several time calibration subsystems have been developed. In this article, the proposal of a last generation Laser Beacon, to be used in KM3NeT and developed to measure and monitor the relative time offsets between photomultipliers, is presented.

  13. Rotational and angular distributions of NO products from NO-Rg(Rg = He, Ne, Ar) complex photodissociation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Heather L. Holmes-Ross; Hall, Gregory E.; Valenti, Rebecca J.; Yu, Hua -Gen; Lawrance, Warren D.

    2016-01-29

    In this study, we present the results of an investigation into the rotational and angular distributions of the NO A~ state fragment following photodissociation of the NO-He, NO-Ne and NO-Ar van der Waals complexed excited via the A~ ← X~ transition. For each complex the dissociation is probed for several values of Ea, the available energy above the dissociation threshold.

  14. Nus and anti-nus from MiniBooNE: searching for the shadow of the ghost

    SciTech Connect (OSTI)

    Mills, Geoffrey B

    2009-01-01

    The latest results from MiniBooNE, the short baseline neutrino experiment operating on the 8 GeV booster's neutrino beam line (the BNB) at Fermilab, are discussed. The standard three active generation model of neutrino oscillations is now grounded firmly by experimental data. Studying the properties of neutrinos at the few percent level and below may uncover new properties of neutrinos and their oscillations and provide a path to physics beyond the standard neutrino model.

  15. A measurement of the neutral current neutrino-nucleon elastic cross section at MiniBooNE

    SciTech Connect (OSTI)

    Cox, David Christopher; /Indiana U.

    2008-02-01

    The neutral current neutrino-nucleon elastic interaction {nu} N {yields} {nu} N is a fundamental process of the weak interaction ideally suited for characterizing the structure of the nucleon neutral weak current. This process comprises {approx}18% of neutrino events in the neutrino oscillation experiment, MiniBooNE, ranking it as the experiment's third largest process. Using {approx}10% of MiniBooNE's available neutrino data, a sample of these events were identified and analyzed to determine the differential cross section as a function of the momentum transfer of the interaction, Q{sup 2}. This is the first measurement of a differential cross section with MiniBooNE data. From this analysis, a value for the nucleon axial mass M{sub A} was extracted to be 1.34 {+-} 0.25 GeV consistent with previous measurements. The integrated cross section for the Q{sup 2} range 0.189 {yields} 1.13 GeV{sup 2} was calculated to be (8.8 {+-} 0.6(stat) {+-} 0.2(syst)) x 10{sup -40} cm{sup 2}.

  16. The prominent role of oxygen in the multiferroicity of DyMnO3 and TbMnO3: a resonant soft x-ray scattering spectroscopy study

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    S. W. Huang; Lee, J. M.; Jeng, H. -T.; Shao, Y.; Wray, L. A.; Chen, J. M.; Qiao, R.; Yang, W. L.; Cao, Y.; Lin, J. -Y.; et al

    2016-07-21

    Oxygen is known to play an important role in the multiferroicity of rare earth manganites; however, how this role changes with rare earth elements is still not fully understood. To address this question, we have used resonant soft x-ray scattering spectroscopy to study the F-type (0; ; 0) diffraction peak from the antiferromagnetic order in DyMnO3 and TbMnO3. We focus on the measurements at O K-edge of these two manganites, supplemented by the results at Mn L2- and Dy M5-edge of DyMnO3. We show that the electronic states of di erent elements are coupled more strongly in DyMnO3 than inmore » TbMnO3, presumably due to the stronger lattice distortion and the tendency to develop E-type antiferromagnetism in the ferroelectric state that promote the orbital hybridization. We also show that the anomaly in the correlation length of (0; ; 0) peak in DyMnO3 signifies the exchange interaction between Mn and rare earth spins, which is absent in TbMnO3. Our findings reveal the prominent role of oxygen orbitals in the multiferroicity of rare earth manganites and the distinct energetics between them.« less

  17. Synthesis of spherical LiMnPO{sub 4}/C composite microparticles

    SciTech Connect (OSTI)

    Bakenov, Zhumabay; Taniguchi, Izumi

    2011-08-15

    Highlights: {yields} We could prepare LiMnPO{sub 4}/C composites by a novel preparation method. {yields} The LiMnPO{sub 4}/C composites were spherical particles with a mean diameter of 3.65 {mu}m. {yields} The LiMnPO{sub 4}/C composite cathode exhibited 112 mAh g{sup -1} at 0.05 C. {yields} It also showed a good rate capability up to 5 C at room temperature and 55 {sup o}C. -- Abstract: Spherical LiMnPO{sub 4}/C composite microparticles were prepared by a combination of spray pyrolysis and spray drying followed by heat treatment and examined as a cathode material for lithium batteries. The structure, morphology and electrochemical performance of the resulting spherical LiMnPO{sub 4}/C microparticles were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electronic microscopy and standard electrochemical techniques. The final sample was identified as a single phase orthorhombic structure of LiMnPO{sub 4} and spherical powders with a geometric mean diameter of 3.65 {mu}m and a geometric standard deviation of 1.34. The electrochemical cells contained the spherical LiMnPO{sub 4}/C microparticles exhibited first discharge capacities of 112 and 130 mAh g{sup -1} at 0.05 C at room temperature and 55 {sup o}C, respectively. These also showed a good rate capability up to 5 C at room temperature and 55 {sup o}C.

  18. Electron scattering mechanisms in Cu-Mn films for interconnect applications

    SciTech Connect (OSTI)

    Misjk, F.; Nagy, K. H.; Radnczi, G.; Lobotka, P.

    2014-08-28

    Electrical properties and corresponding structural features of Cu-Mn alloy films with potential application as barrier and interconnect layers were studied. Cu-Mn films were deposited by DC magnetron sputtering at room temperature on SiO{sub 2} substrates. Electrical resistivity measurements were made as a function of film composition and temperature. The specific resistivity varies linearly with the Mn content showing a maximum of 205???cm at 80 at. % Mn. The temperature coefficient of resistance (TCR) of all alloy films is low, showing non-metallic conductivity for most compositions. Also a minimum TCR has been observed in the 4080 at. % Mn range which was attributed to a magnetic transformation around 200300?K. Electrical resistivity measurements are correlated with the film structure revealed by transmission electron microscopy to clarify the phase regions throughout the composition range. In the 2040 at. % and 7080 at. % Mn ranges, two-phase structures were identified, where Cu- or Mn-rich solid solution grains were surrounded by a thin amorphous covering layer. Based on the revealed phase regions and morphologies electron scattering mechanisms in the system were evaluated by combining the Matthiessen's rule and the Mayadas-Schatzkes theory. Grain boundary reflectivity coefficients (r?=?0.60.8) were calculated from fitting the model to the measurements. The proposed model indicates that, in a binary system, the special arrangement of the two phases results in new scattering mechanisms. The results are of value in optimizing the various parameters needed to produce a suitable barrier layer.

  19. Peculiarly strong room-temperature ferromagnetism from low Mn-doping in ZnO grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Zuo Zheng; Morshed, Muhammad; Liu Jianlin; Beyermann, W. P.; Zheng Jianguo; Xin Yan

    2013-03-15

    Strong room-temperature ferromagnetism is demonstrated in single crystalline Mn-doped ZnO thin films grown by molecular beam epitaxy. Very low Mn doping concentration is investigated, and the measured magnetic moment is much larger than what is expected for an isolated ion based on Hund's rules. The ferromagnetic behavior evolves with Mn concentration. Both magnetic anisotropy and anomalous Hall effect confirm the intrinsic nature of ferromagnetism. While the Mn dopant plays a crucial role, another entity in the system is needed to explain the observed large magnetic moments.

  20. Mn-Stabilized Zirconia: From Imitation Diamonds to a New Potential High-T{sub C} Ferromagnetic Spintronics Material

    SciTech Connect (OSTI)

    Ostanin, S.; Ernst, A.; Sandratskii, L. M.; Bruno, P.; Daene, M.; Hergert, W.; Mertig, I.; Hughes, I. D.; Staunton, J. B.; Kudrnovsky, J.

    2007-01-05

    From the basis of ab initio electronic structure calculations which include the effects of thermally excited magnetic fluctuations, we predict Mn-stabilized cubic zirconia to be ferromagnetic above 500 K. We find this material, which is well known both as an imitation diamond and as a catalyst, to be half-metallic with the majority and minority spin Mn impurity states lying in zirconia's wide gap. The Mn concentration can exceed 40%. The high-T{sub C} ferromagnetism is robust to oxygen vacancy defects and to how the Mn impurities are distributed on the Zr fcc sublattice. We propose this ceramic as a promising future spintronics material.

  1. Properties of Ga{sub 1-x}Mn{sub x}As with high x (>0.1)

    SciTech Connect (OSTI)

    Chiba, D.; Yu, K. M.; Walukiewicz, W.; Nishitani, Y.; Matsukura, F.; Ohno, H.

    2008-04-01

    We have investigated the magnetic and the crystalline properties of a set of Ga{sub 1-x}Mn{sub x}As layers with high nominal Mn compositions (x=0.101-0.198). Magnetization measurements and combined channeling Rutherford backscattering (c-RBS) and particle induced x-ray emission (c-PIXE) measurements have been performed to determine the effective Mn composition x{sub eff} and the fraction of Mn atoms at various lattice sites. Here, x{sub eff} determined from magnetization measurements, which increases with increasing x, is consistent with the results determined from c-RBS-PIXE measurements.

  2. Monte Carlo calculations for reference dosimetry of electron beams with the PTW Roos and NE2571 ion chambers

    SciTech Connect (OSTI)

    Muir, B. R. Rogers, D. W. O.

    2013-12-15

    Purpose: To investigate recommendations for reference dosimetry of electron beams and gradient effects for the NE2571 chamber and to provide beam quality conversion factors using Monte Carlo simulations of the PTW Roos and NE2571 ion chambers. Methods: The EGSnrc code system is used to calculate the absorbed dose-to-water and the dose to the gas in fully modeled ion chambers as a function of depth in water. Electron beams are modeled using realistic accelerator simulations as well as beams modeled as collimated point sources from realistic electron beam spectra or monoenergetic electrons. Beam quality conversion factors are calculated with ratios of the doses to water and to the air in the ion chamber in electron beams and a cobalt-60 reference field. The overall ion chamber correction factor is studied using calculations of water-to-air stopping power ratios. Results: The use of an effective point of measurement shift of 1.55 mm from the front face of the PTW Roos chamber, which places the point of measurement inside the chamber cavity, minimizes the difference betweenR{sub 50}, the beam quality specifier, calculated from chamber simulations compared to that obtained using depth-dose calculations in water. A similar shift minimizes the variation of the overall ion chamber correction factor with depth to the practical range and reduces the root-mean-square deviation of a fit to calculated beam quality conversion factors at the reference depth as a function of R{sub 50}. Similarly, an upstream shift of 0.34 r{sub cav} allows a more accurate determination of R{sub 50} from NE2571 chamber calculations and reduces the variation of the overall ion chamber correction factor with depth. The determination of the gradient correction using a shift of 0.22 r{sub cav} optimizes the root-mean-square deviation of a fit to calculated beam quality conversion factors if all beams investigated are considered. However, if only clinical beams are considered, a good fit to results for

  3. Microsoft Word - SD452.3 FINAL

    National Nuclear Security Administration (NNSA)

    PURPOSE. This Department of Energy (DOE), National Nuclear Security Administration (NNSA) Business Requirements and Process Manual supplements DOE O 452.3 "Management of the...

  4. F.E. S.D. Gender

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    MALE 633 154 79.9% 24.33% 100.0% 0 165 FEMALE 159 52 20.1% 32.70% 74.4% 0.008 2.1523224 X X X 41 11 COMPARISON 633 154 24.33% RACEETHNICITY 792 206 26.01% WHITE(NON-HISPANIC) 733 ...

  5. F.E. S.D. Gender

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    792 206 26.01% 79.9% MALE 633 154 79.9% 24.33% 100.0% 0 165 FEMALE 159 52 20.1% 32.70% 74.4% 0.008 2.1523224 X X X 41 11 COMPARISON 633 154 24.33% RACE/ETHNICITY 792 206 26.01% WHITE(NON-HISPANIC) 733 191 92.6% 26.06% 90.3% 0.219 0.2348801 191 0 BLACK(NON-HISPANIC) 10 1 1.3% 0.295 3 AMERICAN-INDIAN (NON-HISPANIC) 17 4 2.1% 23.53% 100.0% 0.312 0 4 ASIAN (NON-HISPANIC) 4 2 0.5% 0.263 1 1 HISPANIC (ALLRACES) 28 8 3.5% 28.57% 82.4% 0.257 0.3738043 7 1 COMPARISON 17 4 23.53% AGE 792 206 26.01% UNDER

  6. F.E. S.D. Gender

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    0 0 MALE 1.000 FEMALE 1.000 COMPARISON 0 0 0.00% RACE/ETHNICITY 0 0 WHITE(NON-HISPANIC) 1.000 BLACK(NON-HISPANIC) 1.000 AMERICAN-INDIAN (NON-HISPANIC) 1.000 ASIAN (NON-HISPANIC) 1.000 HISPANIC (ALLRACES) 1.000 COMPARISON 0 0 0.00% AGE 0 0 UNDER 40 0 0 40 AND OVER 0 0 1.000 45 AND OVER 0 0 1.000 50 AND OVER 0 0 1.000 55 AND OVER 0 0 1.000 60 AND OVER 0 0 1.000 COMPARISON 0 0 AGE BANDS 0 0 UNDER 40 40-44 1.000 45-49 1.000 50-54 1.000 55-59 1.000 60-64 1.000 65-69 1.000 70-74 1.000 75-79 1.000 80+

  7. F.E. S.D. Gender

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    0 0 MALE 1.000 FEMALE 1.000 COMPARISON 0 0 0.00% RACEETHNICITY 0 0 WHITE(NON-HISPANIC) 1.000 BLACK(NON-HISPANIC) 1.000 AMERICAN-INDIAN (NON-HISPANIC) 1.000 ASIAN (NON-HISPANIC) ...

  8. Enhanced ferromagnetic order in Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} featuring canted [MnO{sub 4}]{sub ∞} spin chains of mixed-valent Mn(III)/Mn(IV). Aliovalent substitution of the Sr{sub 4−x}Ln{sub x}Mn{sup III}{sub 2+x}Mn{sup IV}{sub 1−x}O{sub 3}(GeO{sub 4}){sub 3} solid-solution

    SciTech Connect (OSTI)

    West, J. Palmer; Sulejmanovic, Dino; Becht, Gregory; He, Jian; Hitchcock, Dale; Yan, Yonggao; Hwu, Shiou-Jyh

    2013-10-15

    Crystals of Sr{sub 4−x}Ln{sub x}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} (x=0; x∼0.15 for Ln=La, Pr, Nd, Sm. Eu, Gd, Dy; x∼0.3 for Ln=Gd) were isolated upon using high-temperature, solid-state methods in molten-salt media. These compounds are isostructural with the previously reported Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} (Ln=La, Sm, Gd) series that contains the same [MnO{sub 4}]{sub ∞} spin chains. The synthesis of the Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} (x=0) phase was carried out by a double aliovalent substitution with respect to the Sr{sup 2+} and Ge{sup 4+} ions that replace Na{sup +}/Ln{sup 3+} and As{sup 5+} in Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}, respectively. The title series contains mixed-valent Mn(III)/Mn(IV) and shows a limited range of solid solution, both of which were not observed in the previously reported Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} series. To form the Sr{sub 4−x}Ln{sub x}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} solid solution, one of the Sr{sup 2+} sites, i.e., the original Ln-site in Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}, is partially substituted by Ln{sup 3+} in a statistical disorder of Sr{sub 1−x}/Ln{sub x}. Initial magnetic investigations of selected derivatives reveal higher ferromagnetic ordering temperatures than those reported for the Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} series, presumably attributed to a lesser degree of canting as a result of introducing non-Jahn–Teller Mn{sup 4+} ions. Also intriguing is the observation of multiple anomalies at low temperatures which appear to be of electronic origins. - Graphical abstract: Sr{sub 4−x}Ln{sub x}Mn(III){sub 2+x}Mn(IV){sub 1−x}O{sub 3}(GeO{sub 4}){sub 3}. Display Omitted - Highlights: • Double aliovalent substitution: Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} with respect to Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}. • Solid solution with respect to statistical disorder of Sr{sub 1

  9. Comparison of LiMnPO4 made by Combustion and Hydrothermal Syntheses

    SciTech Connect (OSTI)

    Chen, Jiajun; Doeff, Marca M.; Wang, Ruigang

    2008-05-15

    Among the olivine-structured metal phosphate family, LiMnPO{sub 4} exhibits a high discharge potential (4V), which is still compatible with common electrolytes, making it interesting for use in the next generation of Li ion batteries. The extremely low electronic conductivity of this material severely limits its electrochemical performance, however. One strategy to overcome this limitation is to make LiMnPO{sub 4} nanoparticulate to decrease the diffusion distance. Another is to add a carbon or other conductive coating in intimate contact with the nanoparticles of the main phase, as is commonly done with LiFePO{sub 4}. The electrochemical performance of LiFePO{sub 4} is highly dependent on the quality of the carbon coatings on the particles [1-2], among other variables. Combustion synthesis allows the co-synthesis of nanoparticles coated with carbon in one step. Hydrothermal synthesis is used industrially to make LiFePO{sub 4} cathode materials [3] and affords a good deal of control over purity, crystallinity, and particle size. A wide range of olivine-structured materials has been successfully prepared by this technique [4], including LiMnPO{sub 4} in this study. In this paper, we report on the new synthesis of nano-LiMnPO{sub 4} by a combustion method. The purity is dependent upon the conditions used for synthesis, including the type of fuel and precursors that are chosen. The fuel to nitrate ratio influences the combustion temperature, which determines the type and amount of carbon found in the LiMnPO{sub 4} composites. This can further be modified by use of carbon structural modifiers added during a subsequent (optional) calcination step. Figure 1 shows a transmission electron microscopy (TEM) image of the spherical nano-sized LiMnPO{sub 4} particles typically formed by combustion synthesis. The average particle size is around 30 nm, in agreement with values obtained by the Rietveld refinement of XRD patterns. The small size of the particles cause the peak

  10. Comparison of LiMnPO4 made by Combustion and Hydrothermal Syntheses

    SciTech Connect (OSTI)

    Chen, Jiajun; Doeff, Marca M.; Wang, Ruigang

    2008-10-12

    Among the olivine-structured metal phosphate family, LiMnPO{sub 4} exhibits a high discharge potential (4V), which is still compatible with common electrolytes, making it interesting for use in the next generation of Li ion batteries. The extremely low electronic conductivity of this material severely limits its electrochemical performance, however. One strategy to overcome this limitation is to make LiMnPO{sub 4} nanoparticulate to decrease the diffusion distance. Another is to add a carbon or other conductive coating in intimate contact with the nanoparticles of the main phase, as is commonly done with LiFePO{sub 4}. The electrochemical performance of LiFePO{sub 4} is highly dependent on the quality of the carbon coatings on the particles, among other variables. Combustion synthesis allows the co-synthesis of nanoparticles coated with carbon in one step. Hydrothermal synthesis is used industrially to make LiFePO{sub 4} cathode materials and affords a good deal of control over purity, crystallinity, and particle size. A wide range of olivine-structured materials has been successfully prepared by this technique, including LiMnPO{sub 4} in this study. In this paper, we report on the new synthesis of nano-LiMnPO{sub 4} by a combustion method. The purity is dependent upon the conditions used for synthesis, including the type of fuel and precursors that are chosen. The fuel to nitrate ratio influences the combustion temperature, which determines the type and amount of carbon found in the LiMnPO{sub 4} composites. This can further be modified by use of carbon structural modifiers added during a subsequent (optional) calcination step. Figure 1 shows a transmission electron microscopy (TEM) image of the spherical nano-sized LiMnPO{sub 4} particles typically formed by combustion synthesis. The average particle size is around 30 nm, in agreement with values obtained by the Rietveld refinement of XRD patterns. The small size of the particles cause the peak broadening evident

  11. Disorder dependent half-metallicity in Mn{sub 2}CoSi inverse Heusler alloy

    SciTech Connect (OSTI)

    Singh, Mukhtiyar; Saini, Hardev S.; Thakur, Jyoti; Reshak, Ali H.; Kashyap, Manish K.

    2013-12-15

    Heusler alloys based thin-films often exhibit a degree of atomic disorder which leads to the lowering of spin polarization in spintronic devices. We present ab-initio calculations of atomic disorder effects on spin polarization and half-metallicity of Mn{sub 2}CoSi inverse Heusler alloy. The five types of disorder in Mn{sub 2}CoSi have been proposed and investigated in detail. The A2{sub a}-type and B2-type disorders destroy the half-metallicity whereas it sustains for all disorders concentrations in DO{sub 3a}- and A2{sub b}-type disorder and for smallest disorder concentration studied in DO{sub 3b}-type disorder. Lower formation energy/atom for A2{sub b}-type disorder than other four disorders in Mn{sub 2}CoSi advocates the stability of this disorder. The total magnetic moment shows a strong dependence on the disorder and the change in chemical environment. The 100% spin polarization even in the presence of disorders explicitly supports that these disorders shall not hinder the use of Mn{sub 2}CoSi inverse Heusler alloy in device applications. - Graphical abstract: Minority-spin gap (E{sub g↓}) and HM gap (E{sub sf}) as a function of concentrations of various possible disorder in Mn{sub 2}CoSi inverse Heusler alloy. The squares with solid line (black color)/dotted line (blue color)/dashed line (red color) reperesents E{sub g↓} for DO{sub 3a}-/DO{sub 3b}-/A2{sub b}-type disorder in Mn{sub 2}CoSi and the spheres with solid line (black color)/dottedline (blue color)/dashed line (red color) represents E{sub sf} for DO{sub 3a}-/DO{sub 3b}-/A2{sub b}-type disorder in Mn{sub 2}CoSi. - Highlights: • The DO{sub 3}- and A2-type disorders do not affect the half-metallicity in Mn{sub 2}CoSi. • The B2-type disorder solely destroys half-metallicity in Mn{sub 2}CoSi. • The A2-type disorder most probable to occur out of all three types. • The total spin magnetic moment strongly depends on the disorder concentrations.

  12. Novel Solar Energy Conversion Materials by Design of Mn(II) Oxides

    SciTech Connect (OSTI)

    Lany, S.; Peng, H.; Ndione, P.; Zakutayev, A.; Ginley, D. S.

    2013-01-01

    Solar energy conversion materials need to fulfill simultaneously a number of requirements in regard of their band-structure, optical properties, carrier transport, and doping. Despite their desirable chemical properties, e.g., for photo-electrocatalysis, transition-metal oxides usually do not have desirable semiconducting properties. Instead, oxides with open cation d-shells are typically Mott or charge-transfer insulators with notoriously poor transport properties, resulting from large effective electron/hole masses or from carrier self-trapping. Based on the notion that the electronic structure features (p-d interaction) supporting the p-type conductivity in d10 oxides like Cu2O and CuAlO2 occurs in a similar fashion also in the d5 (high-spin) oxides, we recently studied theoretically the band-structure and transport properties of the prototypical binary d5 oxides MnO and Fe2O3 [PRB 85, 201202(R)]. We found that MnO tends to self-trap holes by forming Mn+III, whereas Fe2O3 self-traps electrons by forming Fe+II. However, the self-trapping of holes is suppressed by when Mn is tetrahedrally coordinated, which suggests specific routes to design novel solar conversion materials by considering ternary Mn(II) oxides or oxide alloys. We are presenting theory, synthesis, and initial characterization for these novel energy materials.

  13. Magnetic susceptibilities of liquid Cr-Au, Mn-Au and Fe-Au alloys

    SciTech Connect (OSTI)

    Ohno, S.; Shimakura, H.; Tahara, S.; Okada, T.

    2015-08-17

    The magnetic susceptibility of liquid Cr-Au, Mn-Au, Fe-Au and Cu-Au alloys was investigated as a function of temperature and composition. Liquid Cr{sub 1-c}Au{sub c} with 0.5 ≤ c and Mn{sub 1-c}Au{sub c} with 0.3≤c obeyed the Curie-Weiss law with regard to their dependence of χ on temperature. The magnetic susceptibilities of liquid Fe-Au alloys also exhibited Curie-Weiss behavior with a reasonable value for the effective number of Bohr magneton. On the Au-rich side, the composition dependence of χ for liquid TM-Au (TM=Cr, Mn, Fe) alloys increased rapidly with increasing TM content, respectively. Additionally, the composition dependences of χ for liquid Cr-Au, Mn-Au, and Fe-Au alloys had maxima at compositions of 50 at% Cr, 70 at% Mn, and 85 at% Fe, respectively. We compared the composition dependences of χ{sub 3d} due to 3d electrons for liquid binary TM-M (M=Au, Al, Si, Sb), and investigated the relationship between χ{sub 3d} and E{sub F} in liquid binary TM-M alloys at a composition of 50 at% TM.

  14. Extended magnetic exchange interactions in the high-temperature ferromagnet MnBi

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Christianson, Andrew D.; Hahn, Steven E.; Fishman, Randy Scott; Parker, David S.; McGuire, Michael A.; Sales, Brian C.; Lumsden, Mark D.; Williams, T. J.; Taylor, A. E.

    2016-05-09

    Here, the high-temperature ferromagnet MnBi continues to receive attention as a candidate to replace rare-earth-containing permanent magnets in applications above room temperature. This is due to a high Curie temperature, large magnetic moments, and a coercivity that increases with temperature. The synthesis of MnBi also allows for crystals that are free of interstitial Mn, enabling more direct access to the key interactions underlying the physical properties of binary Mn-based ferromagnets. In this work, we use inelastic neutron scattering to measure the spin waves of MnBi in order to characterize the magnetic exchange at low temperature. Consistent with the spin reorientationmore » that occurs below 140~K, we do not observe a spin gap in this system above our experimental resolution. A Heisenberg model was fit to the spin wave data in order to characterize the long-range nature of the exchange. It was found that interactions up to sixth nearest neighbor are required to fully parameterize the spin waves. Surprisingly, the nearest-neighbor term is antiferromagnetic, and the realization of a ferromagnetic ground state relies on the more numerous ferromagnetic terms beyond nearest neighbor, suggesting that the ferromagnetic ground state arises as a consequence of the long-ranged interactions in the system.« less

  15. High-Resolution Structure of the Photosynthetic Mn4Ca Catalyst from X-ray Spectroscopy

    SciTech Connect (OSTI)

    Yachandra, Vittal; Yano, Junko; Kern, Jan; Pushkar, Yulia; Sauer, Kenneth; Glatzel, Pieter; Bergmann, Uwe; Messinger, Johannes; Zouni, Athina; Yachandra, Vittal K.

    2007-08-01

    The application of high-resolution X-ray spectroscopy methods to study the photosynthetic water oxidizing complex, which contains a unique hetero-nuclear catalytic Mn4Ca cluster, are described. Issues of X-ray damage especially at the metal sites in the Mn4Ca cluster are discussed. The structure of the Mn4Ca catalyst at high-resolution which has so far eluded attempts of determination by X-ray diffraction, EXAFS and other spectroscopic techniques has been addressed using polarized EXAFS techniques applied to oriented PS II membrane preparations and PS II single crystals. A review of how the resolution of traditional EXAFS techniques can be improved, using methods such as range-extended EXAFS is presented, and the changes that occur in the structure of the cluster as it advances through the catalytic cycle are described. X-ray absorption and emission techniques (XANES and K? emission) have been used earlier to determine the oxidation states of the Mn4Ca cluster, and in this report we review the use of X-ray resonant Raman spectroscopy to understand the electronic structure of the Mn4Ca cluster as it cycles through the intermediate S-states.

  16. Electronic structure and the origin of the Dzyaloshinskii-Moriya interaction in MnSi

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Satpathy, S.; Shanavas, K. V.

    2016-05-02

    Here, the metallic helimagnet MnSi has been found to exhibit skyrmionic spin textures when subjected to magnetic fields at low temperatures. The Dzyaloshinskii-Moriya (DM) interaction plays a key role in stabilizing the skyrmion state. With the help of first-principles calculations, crystal field theory and a tight-binding model we study the electronic structure and the origin of the DM interaction in the B20 phase of MnSi. The strength ofmore » $$\\vec{D}$$ parameter is determined by the magnitude of the spin-orbit interaction and the degree of orbital mixing, induced by the symmetry-breaking distortions in the B20 phase. We find that, strong coupling between Mn-$d$ and Si-$p$ states lead to a mixed valence ground state $$|d^{7-x}p^{2+x}\\rangle$$ configuration. The experimental magnetic moment of $$0.4~\\mu_B$$ is consistent with the Coulomb-corrected DFT+$U$ calculations, which redistributes electrons between the majority and minority spin channels. We derive the magnetic interaction parameters $J$ and $$\\vec{D}$$ for Mn-Si-Mn superexchange paths using Moriya's theory assuming the interaction to be mediated by $e_g$ electrons near the Fermi level. Using parameters from our calculations, we get reasonable agreement with the observations.« less

  17. Sedimentation pulse in the NE Gulf of Mexico following the 2010 DWH blowout

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Brooks, Gregg R.; Larson, Rebekka A.; Schwing, Patrick T.; Romero, Isabel; Moore, Christopher; Reichart, Gert -Jan; Jilbert, Tom; Chanton, Jeff P.; Hastings, David W.; Overholt, Will A.; et al

    2015-07-14

    The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which indicatesmore » a lack of vertical mixing (bioturbation), suggesting the entire layer was deposited within a 4–5 month period. In addition, a time series from four deep-sea sites sampled up to three additional times over the following two years revealed that excess 234Th depths, accumulation rates, and 234Th inventories decreased rapidly, within a few to several months after initial coring. The interpretation of a rapid sedimentation pulse is corroborated by stratification in solid phase Mn, which is linked to diagenesis and redox change, and the dramatic decrease in benthic formanifera density that was recorded in surficial sediments. Results are consistent with a brief depositional pulse that was also reported in previous studies of sediments, and marine snow formation in surface waters closer to the wellhead during the summer and fall of 2010. Although sediment input from the Mississippi River and advective transport may influence sedimentation on the seafloor in the DeSoto Canyon region, we conclude based on multidisciplinary evidence that the sedimentation pulse in late 2010 is the product of marine snow formation and is likely linked to the DWH discharge.« less

  18. Sedimentation pulse in the NE Gulf of Mexico following the 2010 DWH blowout

    SciTech Connect (OSTI)

    Brooks, Gregg R.; Larson, Rebekka A.; Schwing, Patrick T.; Romero, Isabel; Moore, Christopher; Reichart, Gert -Jan; Jilbert, Tom; Chanton, Jeff P.; Hastings, David W.; Overholt, Will A.; Marks, Kala P.; Kostka, Joel E.; Holmes, Charles W.; Hollander, David; Chin, Wei -Chun

    2015-07-14

    The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which indicates a lack of vertical mixing (bioturbation), suggesting the entire layer was deposited within a 4–5 month period. In addition, a time series from four deep-sea sites sampled up to three additional times over the following two years revealed that excess 234Th depths, accumulation rates, and 234Th inventories decreased rapidly, within a few to several months after initial coring. The interpretation of a rapid sedimentation pulse is corroborated by stratification in solid phase Mn, which is linked to diagenesis and redox change, and the dramatic decrease in benthic formanifera density that was recorded in surficial sediments. Results are consistent with a brief depositional pulse that was also reported in previous studies of sediments, and marine snow formation in surface waters closer to the wellhead during the summer and fall of 2010. Although sediment input from the Mississippi River and advective transport may influence sedimentation on the seafloor in the DeSoto Canyon region, we conclude based on multidisciplinary evidence that the sedimentation pulse in late 2010 is the product of marine snow formation and is likely linked to the DWH discharge.

  19. Electronic structural and magnetic properties of Mn{sub 5}Ge{sub 3} clusters

    SciTech Connect (OSTI)

    Yuan, H. K.; Chen, H. Kuang, A. L.; Tian, C. L.; Wang, J. Z.

    2013-11-28

    Theoretical understanding of the stability, ferromagnetism, and spin polarization of Mn{sub 5}Ge{sub 3} clusters has been performed by using the density functional theory with generalized gradient approximation for exchange and correlation. The magnetic moments and magnetic anisotropy energy (MAE) have been calculated for both bulk and clusters, and the enhanced magnetic moment as well as the enlarged MAE have been identified in clusters. The most attractive achievement is that Mn{sub 5}Ge{sub 3} clusters show a fine half-metallic character with large energy scales. The present results may have important implications for potential applications of small Mn{sub 5}Ge{sub 3} clusters as both emerging spintronics and next-generation data-storage technologies.

  20. Theoretical study on the role of dynamics on the unusual magnetic properties in MnBi

    SciTech Connect (OSTI)

    Shanavas, K. V.; Parker, David; Singh, David J.

    2014-11-27

    Here we study the electronic structure and lattice dynamics in the ferromagnet MnBi using first-principles calculations and a tight-binding model. The band structure around the Fermi level is dominated by Bi-p states which are the primary contributors to the magnetic anisotropy energy in the low temperature structure. A tight-binding model consisting of Mn-d and Bi-p states is developed and the parameters are determined from first-principles calculations. Phonon dispersions and elastic moduli exhibit several interesting features. In conclusion, the results imply that the magnetic interaction with the crystal lattice in MnBi is considerably more complex than previously thought and in particular that there is a rich interplay between phonons and magnetism involving both magnetoelastic and magnetostrictive coupling.

  1. Theoretical study on the role of dynamics on the unusual magnetic properties in MnBi

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shanavas, K. V.; Parker, David; Singh, David J.

    2014-11-27

    Here we study the electronic structure and lattice dynamics in the ferromagnet MnBi using first-principles calculations and a tight-binding model. The band structure around the Fermi level is dominated by Bi-p states which are the primary contributors to the magnetic anisotropy energy in the low temperature structure. A tight-binding model consisting of Mn-d and Bi-p states is developed and the parameters are determined from first-principles calculations. Phonon dispersions and elastic moduli exhibit several interesting features. In conclusion, the results imply that the magnetic interaction with the crystal lattice in MnBi is considerably more complex than previously thought and in particularmore » that there is a rich interplay between phonons and magnetism involving both magnetoelastic and magnetostrictive coupling.« less

  2. Anomalous magnetic configuration of Mn{sub 2}NiAl ribbon and the role of hybridization in the martensitic transformation of Mn{sub 50}Ni{sub 50−x}Al{sub x} ribbons

    SciTech Connect (OSTI)

    Zhao, R. B.; Zhao, D. W.; Li, G. K.; Ma, L. E-mail: houdenglu@mail.hebtu.edu.cn; Zhen, C. M.; Hou, D. L. E-mail: houdenglu@mail.hebtu.edu.cn; Wang, W. H.; Liu, E. K.; Chen, J. L.; Wu, G. H.

    2014-12-08

    The magnetic configuration of Mn{sub 2}NiAl ribbon has been investigated. In contrast to Ni{sub 2}MnAl, the compound Mn{sub 2}NiAl with considerable disorder does exhibit ferromagnetism and, due to exchange interaction competition, both ferromagnetic and antiferromagnetic moment orientations can coexist between nearest neighbor Mn atoms. This is unexpected in Heusler alloys. Regarding the mechanism of the martensitic transformation in Mn{sub 50}Ni{sub 50−x}Al{sub x}, it is found that increasing the Al content results in an unusual change in the lattice constant, a decrease of the transformation entropy change, and enhancement of the calculated electron localization. These results indicate that the p-d covalent hybridization between Mn (or Ni) and Al atoms gradually increases at the expense of the d-d hybridization between Ni and Mn atoms. This leads to an increased stability of the austenite phase and a decrease of the martensitic transformation temperature. For 11 ≤ x ≤ 14, Mn{sub 50}Ni{sub 50−x}Al{sub x} ferromagnetic shape memory alloys are obtained.

  3. Enhanced performance of branched TiO{sub 2} nanorod based Mn-doped CdS and Mn-doped CdSe quantum dot-sensitized solar cell

    SciTech Connect (OSTI)

    Kim, Soo-Kyoung; Gopi, Chandu V. V. M.; Lee, Jae-Cheol; Kim, Hee-Je

    2015-04-28

    TiO{sub 2} branched nanostructures could be efficient as photoanodes for quantum dot-sensitized solar cells (QDSCs) due to their large surface area for QD deposition. In this study, Mn-doped CdS/Mn-doped CdSe deposited branched TiO{sub 2} nanorods were fabricated to enhance the photovoltaic performance of QDSCs. Mn doping in CdS and CdSe retards the recombination losses of electrons, while branched TiO{sub 2} nanorods facilitate effective electron transport and compensate for the low surface area of the nanorod structure. As a result, the charge-transfer resistance (R{sub CT}), electron lifetime (?{sub e}), and the amount of QD deposition were significantly improved with branched TiO{sub 2} nanorod based Mn-doped CdS/Mn-doped CdSe quantum dot-sensitized solar cell.

  4. Fabrication of (Mn,Co)3O4 Surface Coatings onto Alloy Substrates

    SciTech Connect (OSTI)

    Yang, Zhenguo; Xia, Guanguang; Li, Xiaohong S.; Singh, Prabhakar; Stevenson, Jeffry W.

    2007-04-30

    Ferritic stainless steels are promising candidates for IT-SOFC interconnect applications due to their low cost and resistance to oxidation at SOFC operating temperatures. However, several challenges remain, including long term electrical conductivity and surface stability under interconnect exposure conditions and chromia scale evaporation. One means of extending interconnect lifetime and improving performance is to apply a protective coating, such as (Mn,Co)3O4 spinel, to the cathode side of the interconnect. These coatings have proven effective in reducing scale growth kinetics and Cr volatility. This report describes several procedures developed at PNNL for fabricating (Mn,Co)3O4 spinel coatings onto ferritic stainless steels.

  5. Unoccupied electronic structure of Ni2MnGa ferromagnetic shape memory alloy

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maniraj, M.; D׳Souza, S. W.; Rai, Abhishek; Schlagel, D. L.; Lograsso, T. A.; Iowa State Univ., Ames, IA; Chakrabarti, Aparna; Barman, S. R.

    2015-08-20

    Momentum resolved inverse photoemission spectroscopy measurements show that the dispersion of the unoccupied bands of Ni2MnGa is significant in the austenite phase. Furthermore, in the martensite phase, it is markedly reduced, which is possibly related to the structural transition to an incommensurate modulated state in the martensite phase. Finally, based on the first principle calculations of the electronic structure of Ni–Mn–Ga, we show that the modification of the spectral shape with surface composition is related to change in the hybridization between the Mn 3d and Ni 3d-like states that dominate the unoccupied conduction band.

  6. Study of lattice dynamics in yttrium doped NdMnO{sub 3} using Raman spectroscopy

    SciTech Connect (OSTI)

    Yadav, Ruchika Elizabeth, Suja; Nair, Harikrishnan S.

    2014-04-24

    A systematic study of Raman spectra on Yttrium doped NdMnO{sub 3} polycrystalline samples was undertaken to understand the lattice dynamics in this compound. Raman active phonons were analyzed and the observed peak were assigned to elucidate various phonon modes in the range (200 - 800) cm{sup −1}. It was observed that at 325 cm{sup −1} phonon frequency shifts upward as much as upto 4 % with increase in Yttrium content. Lattice distortions manifest themselves by frequency shifts in both bending and tilt modes of MnO{sub 6} octahedra, resulting in increase of Raman band line-widths.

  7. Antiferromagentic resonance detected by direct current voltages in MnF{sub 2}/Pt bilayers

    SciTech Connect (OSTI)

    Ross, Philipp; Schreier, Michael Lotze, Johannes; Huebl, Hans; Goennenwein, Sebastian T. B.; Gross, Rudolf

    2015-12-21

    We performed coplanar waveguide-based broadband ferromagnetic resonance experiments on the antiferromagnetic insulator MnF{sub 2}, while simultaneously recording the DC voltage arising in a thin platinum film deposited onto the MnF{sub 2}. The antiferromagnetic resonance is clearly reflected in both the transmission through the waveguide as well as the DC voltage in the Pt strip. The DC voltage remains largely unaffected by field reversal and thus presumably stems from microwave rectification and/or heating effects. However, we identify a small magnetic field orientation dependent contribution, compatible with antiferromagnetic spin pumping theory.

  8. Graphene in proximity to magnetic insulating LaMnO{sub 3}

    SciTech Connect (OSTI)

    Cheng, Guanghui; Wei, Laiming, E-mail: laiming@ustc.edu.cn, E-mail: cgzeng@ustc.edu.cn; Cheng, Long; Liang, Haixing; Zhang, Xiaoqiang; Li, Hui [Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); Yu, Guolin [Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083 (China); Zeng, Changgan, E-mail: laiming@ustc.edu.cn, E-mail: cgzeng@ustc.edu.cn [Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); International Center for Quantum Design of Functional Materials (ICQD), HFNL, University of Science and Technology of China, Hefei, Anhui 230026 (China); Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

    2014-09-29

    Proximity to functional substrates may enhance the coupling between the quantum degrees of freedom and thus develop nontrivial quantum effects in graphene. Here, we demonstrate the successful fabrication of graphene in proximity to atomically flat magnetic insulating LaMnO{sub 3} films. The insulating nature of the LaMnO{sub 3} films not only ensures the electronic transport only occur in the graphene layers but also allow them to serve as dielectric layers for gating. Transport measurements reveal anomalous behaviors, including asymmetrical longitudinal magnetoresistivity and nonlinear Hall effect. This work may pave a way toward the realization of intriguing quantum phases in graphene.

  9. Electron-hole asymmetry, Dirac fermions, and quantum magnetoresistance in BaMnBi2

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Li, Lijun; Wang, Kefeng; Graf, D.; Wang, Limin; Wang, Aifeng; Petrovic, C.

    2016-03-28

    Here, we report two-dimensional quantum transport and Dirac fermions in BaMnBi2 single crystals. BaMnBi2 is a layered bad metal with highly anisotropic conductivity and magnetic order below 290 K. Magnetotransport properties, nonzero Berry phase, small cyclotron mass, and the first-principles band structure calculations indicate the presence of Dirac fermions in Bi square nets. Quantum oscillations in the Hall channel suggest the presence of both electron and hole pockets, whereas Dirac and parabolic states coexist at the Fermi level.

  10. Orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Journal Article: Orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films Citation Details In-Document Search Title: Orbital two-channel Kondo effect in epitaxial ferromagnetic L10-MnAl films The orbital two-channel Kondo effect displaying exotic non-Fermi liquid behaviour arises in the intricate scenario of two conduction electrons compensating a pseudo-spin-1/2 impurity of two-level system. Despite extensive efforts for several decades,

  11. Structural transformations in Mn{sub 2}NiGa due to residual stress

    SciTech Connect (OSTI)

    Singh, Sanjay; Maniraj, M.; D'Souza, S. W.; Barman, S. R.; Ranjan, R.

    2010-02-22

    Powder x-ray diffraction study of Mn{sub 2}NiGa ferromagnetic shape memory alloy shows the existence of a 7M monoclinic modulated structure at room temperature (RT). The structure of Mn{sub 2}NiGa is found to be highly dependent on residual stress. For higher stress, the structure is tetragonal at RT, and for intermediate stress it is 7M monoclinic. However, only when the stress is considerably relaxed, the structure is cubic, as is expected at RT since the martensitic transition temperature is 230 K.

  12. MnO spin-wave dispersion curves from neutron powder diffraction

    SciTech Connect (OSTI)

    Goodwin, Andrew L.; Dove, Martin T.; Tucker, Matthew G.; Keen, David A.

    2007-02-15

    We describe a model-independent approach for the extraction of spin-wave dispersion curves from powder neutron total scattering data. Our approach is based on a statistical analysis of real-space spin configurations to calculate spin-dynamical quantities. The RMCPROFILE implementation of the reverse Monte Carlo refinement process is used to generate a large ensemble of supercell spin configurations from MnO powder diffraction data collected at 100 K. Our analysis of these configurations gives spin-wave dispersion curves for MnO that agree well with those determined independently using neutron triple-axis spectroscopic techniques.

  13. Study of structural and electronic properties of Mn{sub 3}O{sub 4}

    SciTech Connect (OSTI)

    Kaur, Ramandeep Maitra, Tulika Nautiyal, Tashi

    2014-04-24

    Using density functional theory calculations we have examined the structural and electronic properties of magnetic spinel Mn{sub 3}O{sub 4}. We have optimized the structure (both volume and c/a ratio) within GGA. Then Coulomb correlations are included in the calculations to study the electronic properties. We observe that both the band gap and magnetic moment increase with the increase in Coulomb correlation due to the increased Jahn-Teller splitting and localization of the single e{sub g} electron of Mn{sup 3+}.

  14. Perpendicularly magnetized {tau}-MnAl (001) thin films epitaxied on GaAs

    SciTech Connect (OSTI)

    Nie, S. H.; Zhu, L. J.; Lu, J.; Pan, D.; Wang, H. L.; Yu, X. Z.; Xiao, J. X.; Zhao, J. H.

    2013-04-15

    Perpendicularly magnetized {tau}-MnAl films have been epitaxied on GaAs (001) by molecular-beam epitaxy. Crystalline quality and magnetic properties of the samples were strongly dependent on growth temperature. The highest coercivity of 10.7 kOe, saturation magnetization of 361.4 emu/cm{sup 3}, perpendicular magnetic anisotropy constant of 13.65 Merg/cm{sup 3}, and magnetic energy product of 4.44 MGOe were achieved. These tunable magnetic properties make MnAl films valuable as excellent and cost-effective alternative for not only high density perpendicular magnetic recording storage and spintronics devices but also permanent magnets.

  15. Modeling and Characterization of the Magnetocaloric Effect in Ni2MnGa Materials

    SciTech Connect (OSTI)

    Nicholson, Don M; Odbadrakh, Khorgolkhuu; Shassere, Benjamin; Rios, Orlando; Hodges, Jason P; Ludtka, Gerard Michael; Porter, Wallace D; Safa-Sefat, Athena; Rusanu, Aurelian; Brown, Greg; Evans III, Boyd Mccutchen

    2014-01-01

    Magnetic shape memory alloys have great promise as magneto-caloric effect refrigerant materials due to their combined magnetic and structural transitions. Computational and experimental research is reported on the Ni2MnGa material system. The magnetic states of this system are explored using the Wang-Landau statistical approach in conjunction with the Locally Self-consistent Multiple-Scattering method. The effects of alloying agents on the transition temperatures of the Ni2MnGa alloy are investigated using differential scanning calorimetry and superconducting quantum interference device. Experiments are performed at the Spallation Neutron Source at Oak Ridge National Laboratory to observe the structural and magnetic phase transformations.

  16. Enlarged Mn 3s splitting and room-temperature ferromagnetism in epitaxially grown oxygen doped Mn{sub 2}N{sub 0.86} films

    SciTech Connect (OSTI)

    Meng, M.; Wu, S. X. Ren, L. Z.; Zhou, W. Q.; Wang, Y. J.; Wang, G. L.; Li, S. W.

    2014-11-07

    Single-phase and oxygen doped Mn{sub 2}N{sub 0.86} thin films have been grown on MgO (111) by plasma-assisted molecular beam epitaxy. The films grow under tensile strain and, remarkably, they show ferromagnetic-like interactions at low temperature and ferromagnetic ordering agreed well with the Bloch-law T{sup 3/2} at room-temperature. We further demonstrate the enlarged Mn 3s splitting (6.46 eV) and its possible relation to the observed ferromagnetism. Our study not only provide a strategy for further theoretical work on oxygen doped manganese nitrides, but also shed promising light on utilizing its room-temperature FM property to fabricate spintronic devices.

  17. Synthesis of MnO{sub 2}-graphene composites with enhanced supercapacitive performance via pulse electrodeposition under supergravity field

    SciTech Connect (OSTI)

    Liu, Tingting; Shao, Guangjie; Ji, Mingtong; Wang, Guiling

    2014-07-01

    A method of pulse electrodeposition under supergravity field was proposed to synthesize MnO{sub 2}-graphene composites. Supergravity is very efficient for promoting mass transfer and decreasing concentration polarization during the electrodeposition process. The synthesis was conducted on our homemade supergravity equipment. The strength of supergravity field depended on the rotating speed of the ring electrode. 3D flower like MnO{sub 2} spheres composed of nanoflakes were acquired when the rotating speed was 3000 rpm. Graphene nanosheets play as a role of conductive substrates for MnO{sub 2} growing. The composites are evaluated as electrode materials for supercapacitors. Electrochemical results show that the maximum specific capacitance of the MnO{sub 2}-graphene composite is 595.7 F g{sup ?1} at a current density of 0.5 A g{sup ?1}. In addition, the composite exhibits excellent cycle stability with no capacitance attenuation after 1000 cycles. The approach provides new ideas for developing supercapacitor electrode materials with high performance. - Graphical abstract: 3D flower like MnO{sub 2} spheres composed of nanoflakes were acquired at 3000 rpm. - Highlights: MnO{sub 2}-graphene composites were prepared by pulse electrodeposition under supergravity. 3D flower like MnO{sub 2} spheres are anchored on the graphene nanosheets. The MnO{sub 2}-graphene electrode exhibits a specific capacitance of 595.7 F g{sup ?1}.

  18. Angular momentum exchange by gravitational torques and infall in the circumbinary disk of the protostellar system L1551 NE

    SciTech Connect (OSTI)

    Takakuwa, Shigehisa; Ho, Paul T. P. [Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan (China); Saito, Masao [Joint ALMA Observatory, Ave. Alonso de Cordova 3107, Vitacura, Santiago (Chile); Saigo, Kazuya [ALMA Project Office, National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka, Tokyo 181-8588 (Japan); Matsumoto, Tomoaki [Faculty of Humanity and Environment, Hosei University, Chiyoda-ku, Tokyo 102-8160 (Japan); Lim, Jeremy [Department of Physics, University of Hong Kong, Pokfulam Road (Hong Kong); Hanawa, Tomoyuki, E-mail: takakuwa@asiaa.sinica.edu.tw [Center for Frontier Science, Chiba University, Inage-ku, Chiba 263-8522 (Japan)

    2014-11-20

    We report an ALMA observation of the Class I binary protostellar system L1551 NE in the 0.9 mm continuum, C{sup 18}O (3-2), and {sup 13}CO (3-2) lines at a ?1.6 times higher resolution and a ?6 times higher sensitivity than those of our previous SubMillimeter Array (SMA) observations, which revealed a r ? 300 AU scale circumbinary disk in Keplerian rotation. The 0.9 mm continuum shows two opposing U-shaped brightenings in the circumbinary disk and exhibits a depression between the circumbinary disk and the circumstellar disk of the primary protostar. The molecular lines trace non-axisymmetric deviations from Keplerian rotation in the circumbinary disk at higher velocities relative to the systemic velocity, where our previous SMA observations could not detect the lines. In addition, we detect inward motion along the minor axis of the circumbinary disk. To explain the newly observed features, we performed a numerical simulation of gas orbits in a Roche potential tailored to the inferred properties of L1551 NE. The observed U-shaped dust features coincide with locations where gravitational torques from the central binary system are predicted to impart angular momentum to the circumbinary disk, producing shocks and hence density enhancements seen as a pair of spiral arms. The observed inward gas motion coincides with locations where angular momentum is predicted to be lowered by the gravitational torques. The good agreement between our observation and model indicates that gravitational torques from the binary stars constitute the primary driver for exchanging angular momentum so as to permit infall through the circumbinary disk of L1551 NE.

  19. Transfer mechanism in /sup 16/O+/sup 24/Mg and /sup 20/Ne+/sup 24/Mg elastic scattering

    SciTech Connect (OSTI)

    NING Ping-Zhi; GAO Cheng-Qun; HE Guo-Zhu

    1985-10-01

    The mechanism of transferring a cluster of nucleons between two colliding nuclei is considered to explain the backward angle oscillatory rise in the differential cross section of the elastic scattering between certain nuclei, such as /sup 16/O+/sup 24/Mg or /sup 20/Ne+/sup 24/Mg. The nuclear molecular orbit approximation theory is applied. For one-step transfer, if the parameter involved is assumed to be adjustable, the numerical calculations can be made to fit the experimental results naturally.

  20. 35 COFibE, Series A. U. S. ATOXIC ENERGY CCMMISSION r'C Cj NE# YORK OPERATIONS OFFICE

    Office of Legacy Management (LM)

    COFibE, Series A. - U. S. ATOXIC ENERGY CCMMISSION r'C Cj NE# YORK OPERATIONS OFFICE HEkLTH AND SAFETY DIVISION (Merril Eicsnbud, Dirsator) MONTHLY REPORT OF FIELD ACTIVITIES (This report%v,rs%~~~nth period) Indusorial Ii~iene Branoh m a . . 0 . . c . . . o W. B. Harris, Chief Radiation Branch . y y e 0e . e . e . . . . e . . . Hanson Blatz, Chief Fi:e and Accident Branch D e a o o . . . ..s . . B. J. Kehoe, Chief Medical Advioer, Dr. J. A. Quiglsy Siometrician, Dr. A. E. Brandt TABLF OF

  1. Quantum dynamics of solid Ne upon photo-excitation of a NO impurity: A Gaussian wave packet approach

    SciTech Connect (OSTI)

    Unn-Toc, W.; Meier, C.; Halberstadt, N.; Uranga-Pina, Ll.; Rubayo-Soneira, J.

    2012-08-07

    A high-dimensional quantum wave packet approach based on Gaussian wave packets in Cartesian coordinates is presented. In this method, the high-dimensional wave packet is expressed as a product of time-dependent complex Gaussian functions, which describe the motion of individual atoms. It is applied to the ultrafast geometrical rearrangement dynamics of NO doped cryogenic Ne matrices after femtosecond laser pulse excitation. The static deformation of the solid due to the impurity as well as the dynamical response after femtosecond excitation are analyzed and compared to reduced dimensionality studies. The advantages and limitations of this method are analyzed in the perspective of future applications to other quantum solids.

  2. Growth of single-crystal {alpha}-MnO{sub 2} nanorods on multi-walled carbon nanotubes

    SciTech Connect (OSTI)

    Chen Yong; Liu Chenguang; Liu Chang; Lu Gaoqing; Cheng Huiming

    2007-11-06

    Single-crystal {alpha}-MnO{sub 2} nanorods were grown on multi-walled carbon nanotubes (MWNTs) in H{sub 2}SO{sub 4} aqueous solution. The morphology and microstructure of the composites were examined by transmission electron microscopy, high-resolution transmission electron microscopy (HRTEM), X-ray diffractometry and energy dispersive spectroscopy (EDS). The results show that {alpha}-MnO{sub 2} single-crystal nanorods with a mean diameter of 15 nm were densely grown on the surface of MWNTs. Those MWNTs/MnO{sub 2} composites were used as an electrode material for supercapacitors, and it was found that the supercapacitor performance using MWNTs/MnO{sub 2} composites was improved largely compared to that using pure MWNTs and {alpha}-MnO{sub 2} nanorod mechanically mixed with MWNTs.

  3. Low frequency sonochemical synthesis of nanoporous amorphous manganese dioxide (MnO{sub 2}) and adsorption of remazol reactive dye

    SciTech Connect (OSTI)

    Hasan, Siti Zubaidah; Yusop, Muhammad Rahimi; Othman, Mohamed Rozali

    2015-09-25

    Nanoporous amorphous-MnO{sub 2} was synthesized by sonochemical process (sonication) on the solid manganese (II) acetate tetrahydrate (Mn(CH{sub 3}COO){sub 2}.4H{sub 2}O) in 0.1 M KMnO{sub 4}. The product was characterized by X-ray diffraction (XRD), morphology of the material was scanned by Field Emission Scanning Electron Microscopy (FE-SEM) and absorptions of MnO{sub 2} bonding was characterized by Fourier Transform Infra-Red Spectrometer (FT-IR). Remazol reactive dye or Red 3BS, was used in the adsorption study using nanoporous amorphous-MnO{sub 2}. In batch experiment, 10 ppm of Remazol reactive dye was used and experiment was carried out at room temperature. Adsorption of Remazol dye on 0.2g synthesized nanoporous amorphous-MnO{sub 2} showed 99 – 100% decolorization.

  4. Observation of Precipitation Evolution in Fe-Ni-Mn-Ti-Al Maraging Steel using Atom Probe Tomography

    SciTech Connect (OSTI)

    Pereloma, E. V.; Stohr, R A; Miller, Michael K; Ringer, S. P.

    2009-01-01

    We describe the full decomposition sequence in an Fe-Ni-Mn-Ti-Al maraging steel during isothermal annealing at 550 C. Following significant pre-precipitation clustering reactions within the supersaturated martensitic solid solution, (Ni,Fe){sub 3}Ti and (Ni,Fe){sub 3}(Al,Mn) precipitates eventually form after isothermal aging for {approx}60 seconds. The morphology of the (Ni,Fe){sub 3}Ti particles changes gradually during aging from predominantly plate-like to rod-like, and, importantly, Mn and Al were observed to segregate to these precipitate/matrix interfaces. The (Ni,Fe){sub 3}(Al,Mn) precipitates occurred at two main locations: uniformly within the matrix and at the periphery of the (Ni,Fe){sub 3}Ti particles. We relate this latter mode of precipitation to the Mn-Al segregation.

  5. X-ray absorption spectroscopy of Mn doped ZnO thin films prepared by rf sputtering technique

    SciTech Connect (OSTI)

    Yadav, Ashok Kumar; Jha, S. N.; Bhattacharyya, D.; Haque, Sk Maidul; Shukla, Dinesh; Choudhary, Ram Janay

    2015-11-15

    A set of r.f. sputter deposited ZnO thin films prepared with different Mn doping concentrations have been characterised by Extended X-ray Absorption Fine Structure (EXAFS) and X-ray Absorption Near Edge Spectroscopy (XANES) measurements at Zn, Mn and O K edges and at Mn L{sub 2,3} edges apart from long range structural characterisation by Grazing Incident X-ray Diffraction (GIXRD) technique. Magnetic measurements show room temperature ferromagnetism in samples with lower Mn doping which is however, gets destroyed at higher Mn doping concentration. The results of the magnetic measurements have been explained using the local structure information obtained from EXAFS and XANES measurements.

  6. Microstructures and Mechanical Properties of Compositionally Complex Co-free FeNiMnCr18 FCC Solid Solution Alloy

    SciTech Connect (OSTI)

    Wu, Zhenggang; Bei, Hongbin

    2015-01-01

    Recently,a structurally-simplebutcompositionally-complex FeNiCoMnCr highentropyalloywasfoundto haveexcellentmechanicalproperties(e.g.,highstrengthandductility).Tounderstandthepotentialof using highentropyalloysasstructuralmaterialsforadvancednuclearreactorandpowerplants,itis necessary tohaveathoroughunderstandingoftheirstructuralstabilityandmechanicalpropertiesde- gradation underneutronirradiation.ThisrequiresustodevelopasimilarmodelalloywithoutCobe- cause materialwithCowillmakepost-neutron-irradiationtestingdifficult duetotheproductionofthe 60Co radioisotope.Toachievethisgoal,aFCC-structuredsingle-phasealloywithacompositionof FeNiMnCr18 wassuccessfullydeveloped.Thisnear-equiatomicFeNiMnCr18 alloy hasgoodmalleability and itsmicrostructurecanbecontrolledbythermomechanicalprocessing.Byrollingandannealing,the as-cast elongated-grained-microstructureisreplacedbyhomogeneousequiaxedgrains.Themechanical properties (e.g.,strengthandductility)oftheFeNiMnCr18 alloy arecomparabletothoseoftheequiatomic FeNiCoMnCr highentropyalloy.Bothstrengthandductilityincreasewithdecreasingdeformation temperature,withthelargestdifferenceoccurringbetween293and77K.Extensivetwin-bandswhich are bundlesofnumerousindividualtwinsareobservedwhenitistensile-fracturedat77K.Notwin bands aredetectedbyEBSDformaterialsdeformedat293Kandhigher.Theunusualtemperature-de- pendencies ofUTSanduniformelongationcouldbecausedbythedevelopmentofthedensetwin substructure, twin-dislocationinteractionsandtheinteractionsbetweenprimaryandsecondarytwin- ning systemswhichresultinamicrostructurerefinement andhencecauseenhancedstrainhardening and postponednecking.

  7. MxMn8O16 (M = Ag or K) as promising cathode materials for secondary Mg based batteries: The role of the cation M

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Huang, Jianping; Takeuchi, Esther S.; Altug S. Poyraz; Takeuchi, Kenneth J.; Marschilok, Amy C.

    2016-02-15

    Here, AgxMn8O16 (Ag-OMS-2) and KxMn8O16 (K-OMS-2) were investigated as high voltage cathode materials for Mg based batteries. Both MxMn8O16 materials delivered high initial capacities (>180 mA h g–1), and KxMn8O16 showed high cycle stability with a reversible capacity of >170 mA h g–1 after 20 cycles.

  8. Bulk and surface half-metallicity: The case of D0{sub 3}-type Mn{sub 3}Ge

    SciTech Connect (OSTI)

    Liu, Hao; Gao, G. Y. Hu, Lei; Ni, Yun; Zu, Fengxia; Zhu, Sicong; Wang, Shuling; Yao, K. L.

    2014-01-21

    Motivated by the experimental realization of D0{sub 22}-type Mn{sub 3}Ge (001) films [Kurt et al. Appl. Phys. Lett. 101, 132410 (2012)] and the structural stability of D0{sub 3}-type Heusler alloy Mn{sub 3}Ge [Zhang et al. J. Phys.: Condens. Matter 25, 206006 (2013)], we use the first-principles calculations based on the full potential linearized augmented plane-wave method to investigate the electronic and magnetic properties of D0{sub 3}-type Heusler alloy Mn{sub 3}Ge and its (001) surface. We show that bulk D0{sub 3}-Mn{sub 3}Ge is a half-metallic ferromagnet with the minority-spin energy gap of 0.52 eV and the magnetic moment of 1.00 μ{sub B} per formula unit. The bulk half-metallicity is preserved at the pure Mn-terminated (001) surface due to the large exchange split, but the MnGe-terminated (001) surface destroys the bulk half-metallicity. We also reveal that the surface stabilities are comparable between the D0{sub 3}-Mn{sub 3}Ge (001) and the experimental D0{sub 22}-Mn{sub 3}Ge (001), which indicates the feasibility to grow the Mn{sub 3}Ge (001) films with D0{sub 3} phase other than D0{sub 22} one. The surface half-metallicity and stability make D0{sub 3}-Mn{sub 3}Ge a promising candidate for spintronic applications.

  9. Magnetochromic effect in multiferroic R In <mn>1mn> x Mn x O <mn>3mn> ( R = Tb , Dy)

    SciTech Connect (OSTI)

    Chen, P.; Holinsworth, B. S.; O'Neal, K. R.; Brinzari, T. V.; Mazumdar, D.; Topping, C. V.; Luo, X.; Cheong, S.-W.; Singleton, J.; McGill, S.; Musfeldt, J. L.

    2015-05-26

    We combined high field magnetization and magneto-optical spectroscopy to investigate spin-charge coupling in Mn-substituted rare-earth indium oxides of chemical formula RIn₁₋xMnxO₃ (R=Tb, Dy). The edge states, on-site Mn³⁺d to d excitations, and rare-earth f-manifold excitations all track the magnetization energy due to dominant Zeeman interactions. The field-induced modifications to the rare-earth excitations are quite large because spin-orbit coupling naturally mixes spin and charge, suggesting that the next logical step in the design strategy should be to bring spin-orbit coupling onto the trigonal bipyramidal chromophore site with a 4 or 5d center.

  10. Redox Dynamics of Mixed Metal (Mn, Cr, and Fe) Ultrafine Particles

    SciTech Connect (OSTI)

    Nico, Peter S.; Kumfer, Benjamin M.; Kennedy, Ian M.; Anastasio, Cort

    2008-08-01

    The impact of particle composition on metal oxidation state, and on changes in oxidation state with simulated atmospheric aging, are investigated experimentally in flame-generated nanoparticles containing Mn, Cr, and Fe. The results demonstrate that the initial fraction of Cr(VI) within the particles decreases with increasing total metal concentration in the flame. In contrast, the initial Mn oxidation state was only partly controlled by metal loading, suggesting the importance of other factors. Two reaction pathways, one reductive and one oxidative, were found to be operating simultaneously during simulated atmospheric aging. The oxidative pathway depended upon the presence of simulated sunlight and O{sub 3}, whereas the reductive pathway occurred in the presence of simulated sunlight alone. The reductive pathway appears to be rapid but transient, allowing the oxidative pathway to dominate with longer aging times, i.e. greater than {approx}8 hours. The presence of Mn within the particles enhanced the importance of the oxidative pathway, leading to more net Cr oxidation during aging implying that Mn can mediate oxidation by removal of electrons from other particulate metals.

  11. Short- and long-range magnetic order in LaMnAsO

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    McGuire, Michael A.; Garlea, Vasile Ovidiu

    2016-02-02

    The magnetic properties of the layered oxypnictide LaMnAsO have been revisited using neutron scattering and magnetization measurements. The present measurements identify the Néel temperature TN = 360(1) K. Below TN the critical exponent describing the magnetic order parameter is β=0.33–0.35 , consistent with a three-dimensional Heisenberg model. Above this temperature, diffuse magnetic scattering indicative of short-range magnetic order is observed, and this scattering persists up to TSRO = 650(10) K. Morevoer, the magnetic susceptibility shows a weak anomaly at TSRO and no anomaly at TN. Analysis of the diffuse scattering data using a reverse Monte Carlo algorithm indicates that abovemore » TN nearly two-dimensional, short-range magnetic order is present with a correlation length of 9.3(3) Å within the Mn layers at 400 K. The inelastic scattering data reveal a spin gap of 3.5 meV in the long-range ordered state, and strong, low-energy (quasielastic) magnetic excitations emerging in the short-range ordered state. When we compared it with other related compounds correlates the distortion of the Mn coordination tetrahedra to the sign of the magnetic exchange along the layer-stacking direction, and suggests that short-range order above TN is a common feature in the magnetic behavior of layered Mn-based pnictides and oxypnictides.« less

  12. On the structural defects in synthetic {gamma}-MnO{sub 2}s

    SciTech Connect (OSTI)

    Hill, L.I.; Verbaere, A. . E-mail: alain.verbaere@cnrs-imn.fr

    2004-12-01

    In the literature, the {gamma}-MnO{sub 2} structure is considered to be that of ramsdellite (R), in which two types of defects exist. The occurrence of a slab of pyrolusite (r) is named a De Wolff defect and random faults r in R give intergrowths of ramsdellite and pyrolusite, which account well for the global features of many experimental diffraction patterns. The other type of defect results from 'microtwinning', which allows the so-called {epsilon}-MnO{sub 2} to be put with {gamma}-MnO{sub 2} in the same classification. This paper discusses the previous models of defect and what could be the features of the 'microtwinning', giving for each possible model the corresponding expected features in reciprocal space. The results of a selected area electron diffraction study of rather well crystallized samples of {gamma}-MnO{sub 2} are presented. The splitting of particular diffraction spots and new diffuse intensity are interpreted as the first experimental evidence for 'microtwinning', and a model with orientation variants within microdomains embedded in a 'normal' structure is proposed, which is rather different from the previous hypotheses involving parallel twin planes and parallel twin boundaries.

  13. Ordering ferromagnetic In{sub 1?x}Mn{sub x}As quantum dots

    SciTech Connect (OSTI)

    Ferri, Fabio A.; Marega Jr, Euclydes; Kunets, Vasyl P.; Salamo, Gregory J.

    2013-12-04

    In this work, we present a method to order low temperature (LT) self-assembled ferromagnetic In{sub 1?x}Mn{sub x}As quantum dots (QDs) grown by molecular beam epitaxy (MBE). The ordered In{sub 1?x}Mn{sub x}As QDs were grown on top of a non-magnetic In{sub 0.4}Ga{sub 0.6}As/GaAs(100) QDs multi-layered structure. The modulation of the chemical potential, due to the stacking, provides a nucleation center for the LT In{sub 1?x}Mn{sub x}As QDs. For particular conditions, such as surface morphology and growth conditions, the In{sub 1?x}Mn{sub x}As QDs align along lines like chains. For comparison purposes, we also report the study of QDs grown on plain GaAs(100) substrates. Ferromagnetic behavior was observed for all structures at 2 K.

  14. CaMn2Sb2: Spin waves on a frustrated antiferromagnetic honeycomb lattice

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    McNally, D. E.; Simonson, J. W.; Kistner-Morris, J. J.; Smith, G. J.; Hassinger, J. E.; DeBeer-Schmidt, L.; Kolesnikov, A. I.; Zaliznyak, I.; Aronson, M. C.

    2015-05-22

    We present inelastic neutron scattering measurements of the antiferromagnetic insulator CaMn2Sb2:, which consists of corrugated honeycomb layers of Mn. The dispersion of magnetic excitations has been measured along the H and L directions in reciprocal space, with a maximum excitation energy of ≈ 24 meV. These excitations are well described by spin waves in a Heisenberg model, including first and second neighbor exchange interactions, J1 and J2, in the Mn plane and also an exchange interaction between planes. The determined ratio J2/J1 ≈ 1/6 suggests that CaMn2Sb2: is the first example of a compound that lies very close to themore » mean field tricritical point, known for the classical Heisenberg model on the honeycomb lattice, where the N´eel phase and two different spiral phases coexist. The magnitude of the determined exchange interactions reveal a mean field ordering temperature ≈ 4 times larger than the reported N´eel temperature TN = 85 K, suggesting significant frustration arising from proximity to the tricritical point.« less

  15. Modulation on Ni{sub 2}MnGa(001) surface

    SciTech Connect (OSTI)

    D'Souza, S. W.; Rai, Abhishek; Nayak, J.; Maniraj, M.; Dhaka, R. S.; Barman, S. R.; Schlagel, D. L.; Lograsso, T. A.

    2011-07-15

    We report periodic modulation on (001) surface of Ni2MnGa ferromagnetic shape memory alloy. For the stoichiometric surface, analysis of the low energy electron diffraction (LEED) spot profiles shows that the modulation is incommensurate. The modulation appears at 200 K, concomitant with the first order structural transition to the martensitic phase.

  16. Aliovalent titanium substitution in layered mixed Li Ni-Mn-Co oxides for lithium battery applications

    SciTech Connect (OSTI)

    Kam, Kinson; Doeff, Marca M.

    2010-12-01

    Improved electrochemical characteristics are observed for Li[Ni1/3Co1/3-yMyMn1/3]O2 cathode materials when M=Ti and y<0.07, compared to the baseline material, with up to 15percent increased discharge capacity.

  17. HARP targets pion production cross section and yield measurements. Implications for MiniBooNE neutrino flux

    SciTech Connect (OSTI)

    Wickremasinghe, Don Athula Abeyarathna

    2015-07-01

    The prediction of the muon neutrino flux from a 71.0 cm long beryllium target for the MiniBooNE experiment is based on a measured pion production cross section which was taken from a short beryllium target (2.0 cm thick - 5% nuclear interaction length) in the Hadron Production (HARP) experiment at CERN. To verify the extrapolation to our longer target, HARP also measured the pion production from 20.0 cm and 40.0 cm beryllium targets. The measured production yields, d2Nπ± (p; θ )=dpd Ω, on targets of 50% and 100% nuclear interaction lengths in the kinematic rage of momentum from 0.75 GeV/c to 6.5 GeV/c and the range of angle from 30 mrad to 210 mrad are presented along with an update of the short target cross sections. The best fitted extended Sanford-Wang (SW) model parameterization for updated short beryllium target π+ production cross section is presented. Yield measurements for all three targets are also compared with that from the Monte Carlo predictions in the MiniBooNE experiment for different SW parameterization. The comparisons of vμ flux predictions for updated SW model is presented.

  18. Helical antiferromagnetic ordering in Lu1-xScxMnSi

    SciTech Connect (OSTI)

    Goetsch, Ryan J; Anand, V K; Johnston, David C

    2014-08-01

    Polycrystalline samples of Lu1?xScxMnSi (x=0, 0.25, 0.5) are studied using powder x-ray diffraction, heat capacity Cp, magnetization, magnetic susceptibility ?, and electrical resistivity ? measurements versus temperature T and magnetic field H. This system crystallizes in the primitive orthorhombic TiNiSi-type structure (space group Pnma) as previously reported. The ?(T) data indicate metallic behavior. The Cp(T), ?(T), and ?(T) measurements consistently indicate long-range antiferromagnetic (AF) transitions with AF ordering temperatures TN=246, 215, and 188 K for x=0, 0.25, and 0.5, respectively. A second transition is observed at somewhat lower T for each sample from the ?(T) and ?(T) measurements, which we speculate are due to spin reorientation transitions; these second transitions are completely suppressed in H=5.5 T. The Cp data below 10 K for each composition indicate an enhanced Sommerfeld electronic heat capacity coefficient for the series in the range ?=2429 mJ/mol K2. The ?(T) measurements up to 1000 K were fitted by local-moment Curie-Weiss behaviors which indicate a low Mn spin S?1. The ? data below TN are analyzed using the Weiss molecular field theory for a planar noncollinear cycloidal AF structure with a composition-dependent pitch, following the previous neutron diffraction work of Venturini et al. [J. Alloys Compd. 256, 65 (1997)]. Within this model, the fits indicate a turn angle between Mn ordered moments along the cycloid axis of ?100? or ?145?, either of which indicate dominant AF interactions between the Mn spins in the Lu1?xScxMnSi series of compounds.

  19. Structural relationships between new carbide La{sub 14}Sn(MnC{sub 6}){sub 3} and fully ordered La{sub 11}(MnC{sub 6}){sub 3}

    SciTech Connect (OSTI)

    Zaikina, Julia V.; Zhou, Haidong; Latturner, Susan E.

    2010-12-15

    Crystals of the ternary La{sub 11}(MnC{sub 6}){sub 3} and new quaternary carbide La{sub 14}Sn(MnC{sub 6}){sub 3} phases were grown from La/Ni eutectic flux and their structures were determined by means of X-ray single crystal diffraction. La{sub 11}(MnC{sub 6}){sub 3} is a new superstructure variant of La{sub 3.67}MnC{sub 6} (previously reported disordered subcell: P6{sub 3}/m; a{sub 0}=8.806 A; c{sub 0}=5.329 A, Z=2). The superstructure (R3-bar ; a={radical}3a{sub 0}=15.2649(9) A; c=3c{sub 0}=16.013(1) A, Z=6; R{sub 1}=0.022) is realized by complete ordering of the La chains within the columns of face-sharing carbon octahedra, with alternating La-La distances leading to R-centering and enlargement of the unit cell. The structure of the quaternary carbide La{sub 14}Sn(MnC{sub 6}){sub 3} (P6-bar ; a=8.756(1) A; c=10.483(2) A, Z=1; R{sub 1}=0.026) is closely related to that of La{sub 11}(MnC{sub 6}){sub 3} with part of the MnC{sub 6} units replaced by Sn atoms. The structure and precise composition of La{sub 14}Sn(MnC{sub 6}){sub 3} can be derived from that of La{sub 11}(MnC{sub 6}){sub 3} by taking into account the extent of this substitution and variation in lanthanum siting in the chain of carbon octahedra. Band structure calculations indicate both phases are metallic; the La{sub 11}(MnC{sub 6}){sub 3} phase is stabilized by the ordering of La atoms which induces a pseudogap at E{sub F}. -- La{sub 11}(MnC{sub 6}){sub 3} with fully ordered superstructure and a new carbide La{sub 14}Sn(MnC{sub 6}){sub 3} were obtained from La/Ni eutectic flux. Display Omitted

  20. Forward fitting of experimental data from a NE213 neutron detector installed with the magnetic proton recoil upgraded spectrometer at JET

    SciTech Connect (OSTI)

    Binda, F. Ericsson, G.; Eriksson, J.; Hellesen, C.; Conroy, S.; Sundn, E. Andersson; Collaboration: JET-EFDA Team

    2014-11-15

    In this paper, we present the results obtained from the data analysis of neutron spectra measured with a NE213 liquid scintillator at JET. We calculated the neutron response matrix of the instrument combining MCNPX simulations, a generic proton light output function measured with another detector and the fit of data from ohmic pulses. For the analysis, we selected a set of pulses with neutral beam injection heating (NBI) only and we applied a forward fitting procedure of modeled spectral components to extract the fraction of thermal neutron emission. The results showed the same trend of the ones obtained with the dedicated spectrometer TOFOR, even though the values from the NE213 analysis were systematically higher. This discrepancy is probably due to the different lines of sight of the two spectrometers (tangential for the NE213, vertical for TOFOR). The uncertainties on the thermal fraction estimates were from 4 to 7 times higher than the ones from the TOFOR analysis.

  1. The effects of annealing on the microstructure and mechanical properties of Fe28Ni18Mn33Al21

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Meng, Fanling; Qiu, Jingwen; Baker, Ian; Bei, Hongbin

    2015-08-20

    In this paper, As-cast Fe28Ni18Mn33Al21, which consists of aligned, 50 nm, (Ni, Al)-rich B2, and (Fe, Mn)-rich f.c.c. phases, was annealed at a variety of temperatures up to 1423 K and the microstructure and mechanical properties were examined. It was shown that the as-cast microstructure arises from a eutectoid transformation at ~1300 K. Annealing at temperatures ≤1073 K produces β-Mn-structured precipitates and hardness values up to 816 HV, while annealing at temperatures >1073 K leads to dramatic coarsening of the two-phase B2/f.c.c. microstructure (up to 5.5 µm after 50 h at 1273 K), but does not lead to β-Mn precipitation.more » Interestingly, annealing at temperatures >1073 K delays the onset of β-Mn precipitation during subsequent anneals at lower temperatures. Coarsening the B2/f.c.c. lamellar structure by annealing at higher temperatures softens it and leads to increases in ductility from fracture before yield to ~8 % elongation. Finally, the presence of β-Mn precipitates makes the very fine, brittle B2/f.c.c. microstructures even more brittle, but significant ductility (8.4 % elongation) is possible even with β-Mn precipitates present if the B2/f.c.c. matrix is coarse and, hence, more ductile.« less

  2. X-ray and Raman spectroscopic studies on Ru substituted LiMn{sub 2}O{sub 4}

    SciTech Connect (OSTI)

    Kalavathi, S.; Ravindran, T. R.; Sahu, P. Ch.; Kalaivani, D.

    2015-06-24

    Phase pure Ru substituted LiMn{sub 2}O{sub 4} charge frustrated spinel compounds have been synthesized. Ru substitution for Mn is possible only up to 7.5%. Powder diffraction measurements confirm sustenance of charge frustrated cubic phase with space group Fd3m upon substitution of Ru for Mn. An increase in lattice parameter has been observed indicating replacement of Mn as Ru{sup 3+} or Ru{sup 4+} rather than Ru{sup 5+}. Raman spectroscopic measurements show that the crystal structure is robust against an increase of laser power and the observed bands show an expected red shift. In the case of Ru substituted LiMn{sub 2}O{sub 4}, the A{sub 1g} symmetric stretching mode, the F{sup (1)}{sub 2g} and the F{sup (2)}{sub 2g} symmetric bending modes identified with the Mn-O octahedra show a red shift up to Ru 0.075 and at higher Ru concentrations, revert back to the frequency corresponding to the pristine LiMn{sub 2}O{sub 4}.

  3. Structural and magnetic properties of magnetron sputtered Ni-Mn-Sn ferromagnetic shape memory alloy thin films

    SciTech Connect (OSTI)

    Vishnoi, Ritu; Kaur, Davinder

    2010-05-15

    In the present study, structural and magnetic properties of Mn-rich, off-stoichiometric, nanocrystalline Ni-Mn-Sn ferromagnetic shape memory alloy thin films, grown on Si (100) substrates at 550 deg. C by dc magnetron sputtering have been systematically investigated. The crystallization, surface morphology, and structural features were studied using x-ray diffraction, atomic force microscopy, and field emission scanning electron microscopy. The structural transition from austenite to martensite was observed with an increase of Mn content. Austenitic phase with mixed L2{sub 1}/A2+B2 structure has been observed at room temperature in Ni{sub 52.6}Mn{sub 23.7}Sn{sub 23.6} (S{sub 1}) and Ni{sub 51.5}Mn{sub 26.1}Sn{sub 22.2} (S{sub 2}) films, while those with composition of Ni{sub 58.9}Mn{sub 28.0}Sn{sub 13.0} (S{sub 3}) and Ni{sub 58.3}Mn{sub 29.0}Sn{sub 12.6} (S{sub 4}) show martensitic phase with 14M modulated monoclinic structures. Field induced martensite-austenite transformation has been observed in magnetization studies using superconducting quantum interference device magnetometer. Temperature dependent magnetization measurements demonstrate the influence of magnetic field on the structural phase transition temperature. The investigations reveal an increase of martensitic transformation temperature (T{sub M}) with corresponding increase in substitution of Mn. The films exhibit ferromagnetic behavior at low temperatures below Curie temperature (T{sub C}). The decrease in saturation moment with increasing Mn content, indicates the existence of antiferromagnetic correlations within ferromagnetic matrix.

  4. First-principles study on the ferrimagnetic half-metallic Mn{sub 2}FeAs alloy

    SciTech Connect (OSTI)

    Qi, Santao; Zhang, Chuan-Hui; Chen, Bao; Shen, Jiang; Chen, Nanxian

    2015-05-15

    Mn-based full-Heusler alloys are kinds of promising candidates for new half-metallic materials. Basing on first principles, the electronic structures and magnetic properties of the Mn{sub 2}FeAs full-Heusler alloy have been investigated in detail. The Hg{sub 2}CuTi-type Mn{sub 2}FeAs compound obeys the Slater-Pauling rule, while the anti-parallel alignment atomic magnetic moments of Mn locating at different sites indicate it a ferrimagnetic alloy. The calculated spin-down bands behave half-metallic character, exhibiting a direct gap of 0.46 eV with a 100% spin polarization at the Fermi level. More studies show the compound would maintain half-metallic nature in a large range of variational lattice constants. We expect that our calculated results may trigger Mn{sub 2}FeAs applying in the future spintronics field. - Graphical abstract: The d orbitals of Mn and Fe atoms split into multi-degenerated levels which create new bonding and nonbonding states. These exchange splitting shift the Fermi level to origin band gap.▪ - Highlights: • The electronic structure and magnetic properties of Mn{sub 2}FeAs full-Heusler alloy were studied. • A total magnetic moment of 3μ{sub B} was obtained for Mn{sub 2}FeAs alloy, following the SP rule M{sub t}=Z{sub t}−24. • The origin of ferrimagnetism and half-metallic character in Mn{sub 2}FeAs were discussed.

  5. Facile and template-free preparation of {alpha}-MnO{sub 2} nanostructures and their enhanced adsorbability

    SciTech Connect (OSTI)

    Ma, Hongwei; Shen, Jianfeng; Shi, Min; Yan, Bo; Li, Na; Ye, Mingxin

    2011-09-15

    Graphical abstract: . The as-obtained ({alpha}-MnO{sub 2}) nanomaterials could act as an adsorbent to remove Conge red. More significantly, the nanomaterials are nontoxic and environmentally friendly though a biological MTT assay experiment. Plots of the capacity to remove Conge red with time by the commercial and new-prepared {alpha}-MnO{sub 2}. Inset shows absorption of Congo Red with time by new-prepared rod-clusters {alpha}-MnO{sub 2} (0, 10, 20, 40 and 60 min, respectively). Highlights: {yields} Nanostructured {alpha}-MnO{sub 2} was prepared through a template-free hydrothermal method. {yields} The obtained {alpha}-MnO{sub 2} could act as effective adsorbents to remove organic dyes. {yields} The obtained adsorbents are environmentally friendly. -- Abstract: In this paper, nanostructured MnO{sub 2} materials were successfully prepared through a simple and template-free hydrothermal method. X-ray diffraction pattern indicates that the as-prepared nanomaterials are {alpha}-MnO{sub 2}. Transmission Electron Microscopy and Scanning Electron Microscopy images demonstrate that nanostructured rod-clusters {alpha}-MnO{sub 2} could be evolved from the nanorods. Brunauer-Emmett-Teller (BET) surface area measurement was employed to characterize the surface property. Moreover, the as-obtained ({alpha}-MnO{sub 2}) nanomaterials could act as an efficient adsorbent to remove Congo Red and Methlylene Blue. More significantly, the nanomaterials are nontoxic and environmentally friendly via biological methylthiazolyldiphenyltetrazoliumbromide assay experiments. Its nontoxic and enhanced adsorbability properties guarantee their safe applications in environmental protection and industrial aspects.

  6. Publisher's Note: Level structure 18Ne and its importance in the 14O(α,p)17F reaction rate [Phys. Rev. C 86, 025801(2012)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Almaraz-Calderon, S.; Tan, W. P.; Aprahamian, A.; Bucher, B.; Roberts, A.; Wiescher, M.; Brune, C. R.; Massey, T. N.; Ozkan, N.; Guray, R. T.; et al

    2012-08-10

    The level structure of 18Ne above the α-decay threshold has been studied using the 16O(3He,n) reaction. A coincidence measurement of neutrons and charged particles decaying from populated states in 18Ne has been made. Decay branching ratios were measured for six resonances and used to calculate the 14O(α,p)17F reaction rate which is a measure of one of two breakout paths from the Hot CNO cycle. As a result, the new experimental information combined with previous experimental and theoretical information, provides a more accurate calculation of the reaction rate.

  7. Atomic moments in Mn{sub 2}CoAl thin films analyzed by X-ray magnetic circular dichroism

    SciTech Connect (OSTI)

    Jamer, M. E.; Assaf, B. A.; Heiman, D.; Sterbinsky, G. E.; Arena, D. A.

    2014-12-07

    Spin gapless semiconductors are known to be strongly affected by structural disorder when grown epitaxially as thin films. The magnetic properties of Mn{sub 2}CoAl thin films grown on GaAs (001) substrates are investigated here as a function of annealing. This study investigates the atomic-specific magnetic moments of Mn and Co atoms measured through X-ray magnetic circular dichroism as a function of annealing and the consequent structural ordering. The results indicate that the structural distortion mainly affects the Mn atoms as seen by the reduction of the magnetic moment from its predicted value.

  8. Atomic moments in Mn2CoAl thin films analyzed by X-ray magnetic circular dichroism

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Jamer, M. E.; Assaf, B. A.; Sterbinsky, G. E.; Arena, D. A.; Heiman, D.

    2014-12-05

    Spin gapless semiconductors are known to be strongly affected by structural disorder when grown epitaxially as thin films. The magnetic properties of Mn2CoAl thin films grown on GaAs (001) substrates are investigated here as a function of annealing. This study investigates the atomic-specific magnetic moments of Mn and Co atoms measured through X-ray magnetic circular dichroism as a function of annealing and the consequent structural ordering. Results indicate that the structural distortion mainly affects the Mn atoms as seen by the reduction of the magnetic moment from its predicted value.

  9. Large enhancement of Blocking temperature by control of interfacial structures in Pt/NiFe/IrMn/MgO/Pt multilayers

    SciTech Connect (OSTI)

    Chen, Xi; Wang, Shouguo Han, Gang; Jiang, Shaolong; Yang, Kang; Liu, Qianqian; Yu, Guanghua; Liu, Jialong; Wang, Rongming

    2015-09-15

    The Blocking temperature (T{sub B}) of Pt/NiFe/IrMn/MgO/Pt multilayers was greatly enhanced from far below room temperature (RT) to above RT by inserting 1 nm thick Mg layer at IrMn/MgO interface. Furthermore, the exchange bias field (H{sub eb}) was increased as well by the control of interfacial structures. The evidence for a significant fraction of Mn-O bonding at IrMn/MgO interface without Mg insertion layer was provided by X-ray photoelectron spectroscopy. The bonding between Mn and O can decrease the antiferromagnetism of IrMn film, leading to lower value of T{sub B} in Pt/NiFe/IrMn/MgO/Pt multilayers. Ultrathin Mg film inserted at IrMn/MgO interface acting as an oxygen sinking layer can suppress the oxidation reactions between Mn and O and reduce the formation of Mn-O bonding greatly. The oxidation suppression results in the recovery of the antiferromagnetism of IrMn film, which can enhance T{sub B} and H{sub eb}. Furthermore, the high resolution transmission electron microscopy demonstrates that the Mg insertion layer can efficiently promote a high-quality MgO (200) texture. This study will enhance the understanding of physics in antiferromagnet-based spintronic devices.

  10. Visible Light-Induced Electron Transfer from Di-mu-oxo Bridged Dinuclear Mn Complexes to Cr Centers in Silica Nanopores

    SciTech Connect (OSTI)

    Frei, Heinz; Weare, Walter W.; Pushkar, Yulia; Yachandra, Vittal K.; Frei, Heinz

    2008-06-03

    The compound (bpy)2MnIII(mu-O)2MnIV(bpy)2, a structural model relevant for the photosynthetic water oxidation complex, was coupled to single CrVI charge-transfer chromophores in the channels of the nanoporous oxide AlMCM-41. Mn K-edge EXAFS spectroscopy confirmed that the di-mu-oxo dinuclear Mn core of the complex is unaffected when loaded into the nanoscale pores. Observation of the 16-line EPR signal characteristic of MnIII(mu-O)2MnIV demonstrates that the majority of the loaded complexes retained their nascent oxidation state in the presence or absence of CrVI centers. The FT-Raman spectrum upon visible light excitation of the CrVI-OII --> CrV-OI ligand-to-metal charge-transfer reveals electron transfer from MnIII(mu-O)2MnIV (Mn-O stretch at 700 cm-1) to CrVI, resulting in the formation of CrV and MnIV(mu-O)2MnIV (Mn-O stretch at 645 cm-1). All initial and final states are directly observed by FT-Raman or EPR spectroscopy, and the assignments corroborated by X-ray absorption spectroscopy measurements. The endoergic charge separation products (DELTA Eo = -0.6 V) remain after several minutes, which points to spatial separation of CrV and MnIV(mu-O)2MnIV as a consequence of hole (OI) hopping as a major contributing mechanism. This is the first observation of visible light-induced oxidation of a potential water oxidation complex by a metal charge-transfer pump in a nanoporous environment. These findings will allow for the assembly and photochemical characterization of well defined transition metal molecular units, with the ultimate goal of performing endothermic, multi-electron transformations that are coupled to visible light electron pumps in nanostructured scaffolds.

  11. Penetration depth and absorption mechanisms of spin currents in Ir{sub 20}Mn{sub 80} and Fe{sub 50}Mn{sub 50} polycrystalline films by ferromagnetic resonance and spin pumping

    SciTech Connect (OSTI)

    Merodio, P.; Ghosh, A.; Lemonias, C.; Gautier, E.; Ebels, U.; Chshiev, M.; Béa, H. E-mail: helene.bea@cea.fr; Baltz, V. E-mail: helene.bea@cea.fr

    2014-01-20

    Spintronics relies on the spin dependent transport properties of ferromagnets (Fs). Although antiferromagnets (AFs) are used for their magnetic properties only, some fundamental F-spintronics phenomena like spin transfer torque, domain wall motion, and tunnel anisotropic magnetoresistance also occur with AFs, thus making AF-spintronics attractive. Here, room temperature critical depths and absorption mechanisms of spin currents in Ir{sub 20}Mn{sub 80} and Fe{sub 50}Mn{sub 50} are determined by F-resonance and spin pumping. In particular, we find room temperature critical depths originating from different absorption mechanisms: dephasing for Ir{sub 20}Mn{sub 80} and spin flipping for Fe{sub 50}Mn{sub 50}.

  12. Notices 20 Miles Northwest of Rapid City SD Rapid City SD 57702

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Agriculture Property Number: 15201410029 Status: Excess Comments: 744 sq. ft.; bunkhouse; 5+ months vacant; poor to fair conditions; contact Agriculture for more information. ...

  13. Category:Utility Rate Impacts on PV Economics By Location | Open...

    Open Energy Info (EERE)

    MI Traverse City, MI International Falls, MN Minneapolis, MN Kansas City, MO Jackson, MS Billings, MT Greensboro, NC Wilmington, NC Bismarck, ND Minot, ND Omaha, NE...

  14. Using the X-FEL to photo-pump X-ray laser transitions in He-like Ne

    SciTech Connect (OSTI)

    Nilsen, J; Rohringer, N

    2011-08-30

    Nearly four decades ago H-like and He-like resonantly photo-pumped laser schemes were proposed for producing X-ray lasers. However, demonstrating these schemes in the laboratory has proved to be elusive because of the difficulty of finding a strong resonant pump line. With the advent of the X-ray free electron laser (X-FEL) at the SLAC Linac Coherent Light Source (LCLS) we now have a tunable X-ray laser source that can be used to replace the pump line in previously proposed laser schemes and allow researchers to study the physics and feasibility of resonantly photo-pumped laser schemes. In this paper we use the X-FEL at 1174 eV to photo-pump the singly excited 1s2p state of He-like Ne to the doubly excited 2p3p state and model gain on the 2p3p-2p2s transition at 175 eV and the 2p3p-1s3p transition at 1017 eV. One motivation for studying this scheme is to explore possible quenching of the gain due to strong non-linear coupling effects from the intense X-FEL beam We compare this scheme with photo-pumping the He-like Ne ground state to the 1s3p singly excited state followed by lasing on the 3p-2s and 3d-2p transitions at 158 and 151 eV. Experiments are being planned at LCLS to study these laser processes and coherent quantum effects.

  15. DOE-NE Light Water Reactor Sustainability Program and EPRI Long-Term Operations Program. Joint Research and Development Plan

    SciTech Connect (OSTI)

    Williams, Don

    2014-04-01

    Nuclear power has contributed almost 20% of the total amount of electricity generated in the United States over the past two decades. High capacity factors and low operating costs make nuclear power plants (NPPs) some of the most economical power generators available. Further, nuclear power remains the single largest contributor (nearly 70%) of non-greenhouse gas-emitting electric power generation in the United States. Even when major refurbishments are performed to extend operating life, these plants continue to represent cost-effective, low-carbon assets to the nation’s electrical generation capability. By the end of 2014, about one-third of the existing domestic fleet will have passed their 40th anniversary of power operations, and about one-half of the fleet will reach the same 40-year mark within this decade. Recognizing the challenges associated with pursuing extended service life of commercial nuclear power plants, the U.S. Department of Energy’s (DOE) Office of Nuclear Energy (NE) and the Electric Power Research Institute (EPRI) have established separate but complementary research and development programs (DOE-NE’s Light Water Reactor Sustainability [LWRS] Program and EPRI’s Long-Term Operations [LTO] Program) to address these challenges. To ensure that a proper linkage is maintained between the programs, DOE-NE and EPRI executed a memorandum of understanding in late 2010 to “establish guiding principles under which research activities (between LWRS and LTO) could be coordinated to the benefit of both parties.” This document represents the third annual revision to the initial version (March 2011) of the plan as called for in the memorandum of understanding.

  16. Influence of Mn concentration on magnetic topological insulator MnxBi2−xTe3 thin-film Hall-effect sensor

    SciTech Connect (OSTI)

    Ni, Y.; Zhang, Z.; Nlebedim, I. C.; Hadimani, R. L.; Jiles, D. C.

    2015-06-11

    Hall-effect (HE) sensors based on high-quality Mn-doped Bi2Te3 topological insulator (TI) thin films have been systematically studied in this paper. Improvement of Hall sensitivity is found after doping the magnetic element Mn into Bi2Te3. The sensors with low Mn concentrations, MnxBi2-xTe3, x = 0.01 and 0.08 show the linear behavior of Hall resistance with sensitivity about 5 Ω/T. And their Hall sensitivity shows weak dependence on temperature. For sensors with high Mn concentration (x = 0.23), the Hall resistance with respect to magnetic field shows a hysteretic behavior. Moreover, its sensitivity shows almost eight times as high as that of the HE sensors with low Mn concentration. The highest sensitivity can reach 43 Ω/T at very low magnetic field. This increase of Hall sensitivity is caused by the occurrence of anomalous HE (AHE) after ferromagnetic phase transition. Our work indicates that the magnetic-element-doped TIs with AHE are good candidates for HE sensors.

  17. Spintronic properties of Li1.5Mn0.5Z (Z=As, Sb) compounds in...

    Office of Scientific and Technical Information (OSTI)

    Publisher's Accepted Manuscript: Spintronic properties of Li1.5Mn0.5Z (ZAs, Sb) compounds in the Cu2Sb structure This content will become publicly available on January 26, 2017 ...

  18. Post-Growth Annealing of Bridgman-grown CdZnTe and CdMnTe Crystals...

    Office of Scientific and Technical Information (OSTI)

    Nuclear Radiation Detectors Citation Details In-Document Search Title: Post-Growth Annealing of Bridgman-grown CdZnTe and CdMnTe Crystals for Room-temperature Nuclear ...

  19. Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hedden, Morgan; Francis, Nick; Haraldsen, Jason T.; Ahmed, Towfiq; Constantin, Costel

    2015-07-15

    Particle sizes of manganese oxide (β-MnO₂) powders were modified by using a mortar and pestle ground method for period of times that varied between 15–60 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of β-MnO₂ powders as a function of electrical resistance in the range of RP = 10 - 80Ω were measured. Based on the data presented, we propose a model for the β-MnO₂ system in which nanometer-scale MnO₂ crystallites bond together through weak van der Waals forces to form larger conglomerates that span inmore » size from nanometer to micrometer scale.« less

  20. Electronic properties of Mn-phthalocyanine–C{sub 60} bulk heterojunctions: Combining photoemission and electron energy-loss spectroscopy

    SciTech Connect (OSTI)

    Roth, Friedrich; Lupulescu, Cosmin; Darlatt, Erik; Gottwald, Alexander; Eberhardt, Wolfgang

    2015-11-14

    The electronic properties of co-evaporated mixtures (blends) of manganese phthalocyanine and the fullerene C{sub 60} (MnPc:C{sub 60}) have been studied as a function of the concentration of the two constituents using two supplementary electron spectroscopic methods, photoemission spectroscopy (PES) and electron energy-loss spectroscopy (EELS) in transmission. Our PES measurements provide a detailed picture of the electronic structure measured with different excitation energies as well as different mixing ratios between MnPc and C{sub 60}. Besides a relative energy shift, the occupied electronic states of the two materials remain essentially unchanged. The observed energy level alignment is different compared to that of the related CuPc:C{sub 60} bulk heterojunction. Moreover, the results from our EELS investigations show that, despite the rather small interface interaction, the MnPc related electronic excitation spectrum changes significantly by admixing C{sub 60} to MnPc thin films.