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1

An Atom-Wide Antennae Created from Difference-Making Defects | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

An Atom-Wide Antennae Created from Difference-Making Defects An Atom-Wide Antennae Created from Difference-Making Defects An Atom-Wide Antennae Created from Difference-Making Defects March 7, 2012 - 3:35pm Addthis Take advantage of microwave microscopy, researchers were able to locate graphene islands on graphene. “Point defects” locally enhanced the graphene’s ability to transform waves of light into electronic signals. | Photo courtesy of Oak Ridge National Laboratory. Take advantage of microwave microscopy, researchers were able to locate graphene islands on graphene. "Point defects" locally enhanced the graphene's ability to transform waves of light into electronic signals. | Photo courtesy of Oak Ridge National Laboratory. Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science

2

Atom probe tomography characterisation of a laser diode structure grown by molecular beam epitaxy  

E-Print Network (OSTI)

by the two techniques. 7 2. Experiment The LD structure wafer was grown using a Veeco V80 MBE system, on a commercially available ultra-low TD density template consisting of ~10 m of GaN grown by MOVPE on a sapphire substrate (Lumilog ULD template... of Europe to growth of the sample. SEB also thanks the Institute of Physics for the award of the annual Roy prize for a doctoral thesis on condensed matter and material physics, and the 20 Centre for Advanced Structural Ceramics for the award...

Bennett, Samantha; Smeeton, Tim; Saxey, David; Smith, George; Hooper, Stewart; Heffernan, Jonathan; Humphreys, Colin; Oliver, Rachel

2012-03-06T23:59:59.000Z

3

ZnO Nanowires Grown on ZnO Thin Film Deposited by Atomic Layer ...  

Science Conference Proceedings (OSTI)

In this work the atomic layer deposition (ALD) technique was used to deposit the seeding ... 3D Multiwall Carbon Nanotubes (MWCNTs) for Li-Ion Battery Anode.

4

Epitaxial strontium titanate films grown by atomic layer deposition on SrTiO{sub 3}-buffered Si(001) substrates  

SciTech Connect

Epitaxial strontium titanate (STO) films have been grown by atomic layer deposition (ALD) on Si(001) substrates with a thin STO buffer layer grown by molecular beam epitaxy (MBE). Four unit cells of STO grown by MBE serve as the surface template for ALD growth. The STO films grown by ALD are crystalline as-deposited with minimal, if any, amorphous SiO{sub x} layer at the STO-Si interface. The growth of STO was achieved using bis(triisopropylcyclopentadienyl)-strontium, titanium tetraisopropoxide, and water as the coreactants at a substrate temperature of 250 Degree-Sign C. In situ x-ray photoelectron spectroscopy (XPS) analysis revealed that the ALD process did not induce additional Si-O bonding at the STO-Si interface. Postdeposition XPS analysis also revealed sporadic carbon incorporation in the as-deposited films. However, annealing at a temperature of 250 Degree-Sign C for 30 min in moderate to high vacuum (10{sup -6}-10{sup -9} Torr) removed the carbon species. Higher annealing temperatures (>275 Degree-Sign C) gave rise to a small increase in Si-O bonding, as indicated by XPS, but no reduced Ti species were observed. X-ray diffraction revealed that the as-deposited STO films were c-axis oriented and fully crystalline. A rocking curve around the STO(002) reflection gave a full width at half maximum of 0.30 Degree-Sign {+-} 0.06 Degree-Sign for film thicknesses ranging from 5 to 25 nm. Cross-sectional transmission electron microscopy revealed that the STO films were continuous with conformal growth to the substrate and smooth interfaces between the ALD- and MBE-grown STO. Overall, the results indicate that thick, crystalline STO can be grown on Si(001) substrates by ALD with minimal formation of an amorphous SiO{sub x} layer using a four-unit-cell STO buffer layer grown by MBE to serve as the surface template.

McDaniel, Martin D.; Posadas, Agham; Ngo, Thong Q.; Dhamdhere, Ajit; Smith, David J.; Demkov, Alexander A.; Ekerdt, John G. [Department of Chemical Engineering, University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712 (United States); Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712 (United States); Department of Chemical Engineering, University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712 (United States); Department of Physics, Arizona State University, Tempe, Arizona 85287-1504 (United States); Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712 (United States); Department of Chemical Engineering, University of Texas at Austin, 1 University Station C0400, Austin, Texas 78712 (United States)

2013-01-15T23:59:59.000Z

5

Electrical properties and interfacial chemical environments of in situ atomic layer deposited Al2O3 on freshly molecular beam epitaxy grown GaAs  

Science Conference Proceedings (OSTI)

Interfacial chemical analyses and electrical characterization of in situ atomic layer deposited (ALD) Al"2O"3 on freshly molecular beam epitaxy (MBE) grown n- and p- GaAs (001) with a (4x6) surface reconstruction are performed. The capacitance-voltage ... Keywords: Atomic layer deposition, III-V compound semiconductor, Molecular beam epitaxy

Y. H. Chang; M. L. Huang; P. Chang; C. A. Lin; Y. J. Chu; B. R. Chen; C. L. Hsu; J. Kwo; T. W. Pi; M. Hong

2011-04-01T23:59:59.000Z

6

Photoluminescence associated with basal stacking faults in c-plane ZnO epitaxial film grown by atomic layer deposition  

Science Conference Proceedings (OSTI)

Basal plane stacking faults (BSFs) with density of {approx}1 x 10{sup 6} cm{sup -1} are identified as the dominant defect in the annealed ZnO thin films grown on c-plane sapphire by atomic layer deposition. The dominant peak centered at 3.321 eV in low-temperature photoluminescence measurements is attributed to the emission from the BSFs. The emission mechanism is considered to be the confined indirect excitons in the region of quantum-well-like structure formed by the BSFs. The observed energy shift of 19 meV with respect to the BSF-bounded exciton at low temperature may be caused by the localization effect associated with the coupling between BSF quantum wells.

Yang, S.; Kuo, C. C.; Hsieh, W. F. [Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan (China); Liu, W.-R. [Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China); Lin, B. H. [Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan (China); Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China); Hsu, H.-C. [Institute of Electro-Optical Science and Engineering and Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 70101, Taiwan (China); Hsu, C.-H. [Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China); Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan (China)

2012-03-05T23:59:59.000Z

7

Fine structure of AlN/AlGaN superlattice grown by pulsed atomic-layer epitaxy for dislocation filtering  

SciTech Connect

We report the detailed structure analysis of our AlN/AlGaN superlattice (SL) grown by pulsed atomic-layer epitaxy (PALE) for dislocation filtering. Due to the nature of PALE, the AlGaN well material itself in the SL was found to be composed actually of an Al{sub x}Ga{sub 1-x}N/Al{sub y}Ga{sub 1-y}N short-period superlattice (SPSL), with the periodicity of 15.5 A ({approx_equal}6 monolayer), determined consistently from high-resolution x-ray diffraction and high-resolution transmission electron microscopy measurements. The SPSL nature of the AlGaN layers is believed to benefit from the AlN/AlGaN SL's coherent growth, which is important in exerting compressive strain for the thick upper n-AlGaN film, which serves to eliminate cracks. Direct evidence is presented which indicates that this SL can dramatically reduce the screw-type threading dislocation density.

Sun, W.H.; Zhang, J.P.; Yang, J.W.; Maruska, H.P.; Khan, M. Asif; Liu, R.; Ponce, F.A. [Department of Electrical Engineering, University of South Carolina, Columbia, South Carolina 29208 (United States); Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85287 (United States)

2005-11-21T23:59:59.000Z

8

Atomic-resolution study of polarity reversal in GaSb grown on Si by scanning transmission electron microscopy  

SciTech Connect

The atomic-resolved reversal of the polarity across an antiphase boundary (APB) was observed in GaSb films grown on Si by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The investigation of the interface structure at the origin of the APB reveals that coalescence of two domains with Ga-prelayer and Sb-prelayer causes the sublattice reversal. The local strain and lattice rotation distributions of the APB, attributed to the discordant bonding length at the APB with the surrounding GaSb lattice, were further studied using the geometric phase analysis technique. The crystallographic characteristics of the APBs and their interaction with other planar defects were observed with HAADF-STEM. The quantitative agreement between experimental and simulated images confirms the observed polarities in the acquired HAADF-STEM data. The self-annihilation mechanism of the APBs is addressed based on the rotation induced by anti-site bonds and APBs' faceting.

Hosseini Vajargah, S.; Woo, S. Y.; Botton, G. A. [Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario L8S 4L7 (Canada); Brockhouse Institute for Material Research, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Canadian Centre for Electron Microscopy, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Ghanad-Tavakoli, S. [Centre for Emerging Device Technologies, McMaster University, Hamilton, Ontario L8S 4L7 (Canada); Kleiman, R. N.; Preston, J. S. [Brockhouse Institute for Material Research, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Centre for Emerging Device Technologies, McMaster University, Hamilton, Ontario L8S 4L7 (Canada); Department of Engineering Physics, McMaster University, Hamilton, Ontario L8S 4L7 (Canada)

2012-11-01T23:59:59.000Z

9

Photoluminescence study of GaAs films on Si(100) grown by atomic hydrogen-assisted molecular beam epitaxy  

Science Conference Proceedings (OSTI)

Keywords: atomic hydrogen-mediated epitaxy, lattice-mismatched heteroepitaxy, minority carrier lifetime, molecular beam epitaxy, photoluminescence decay, solar cells

Yoshitaka Okada; Shigeru Ohta; Akio Kawabata; Hirofumi Shimomura; Mitsuo Kawabe

1994-03-01T23:59:59.000Z

10

Effects of the oxygen precursor on the electrical and structural properties of HfO{sub 2} films grown by atomic layer deposition on Ge  

SciTech Connect

We report on the growth by atomic layer deposition of HfO{sub 2} films on HF-last treated Ge(001) substrates using HfCl{sub 4} as a Hf source and either O{sub 3} or H{sub 2}O as oxygen sources. The choice of the oxygen precursor strongly influences the structural, chemical, and electrical properties of the HfO{sub 2} films: Those grown using H{sub 2}O exhibit local epitaxial growth, a large amount of contaminants such as chlorine and carbon, and a large frequency dispersion of the capacitance-voltage (C-V) characteristics. Films grown using O{sub 3} are good insulators and exhibit well-shaped C-V curves with a minimum frequency dispersion of the accumulation capacitance. Moreover, they are smoother, less crystallized, and with a lower contaminant content than those grown using H{sub 2}O. However, the use of O{sub 3} leads to the formation of a 2 nm thick layer, possibly GeO{sub x}, at the HfO{sub 2}/Ge interface.

Spiga, S.; Wiemer, C.; Tallarida, G.; Scarel, G.; Ferrari, S.; Seguini, G.; Fanciulli, M. [Laboratorio Nazionale MDM-INFM, Via C. Olivetti 2, 20041 Agrate Brianza, MI (Italy)

2005-09-12T23:59:59.000Z

11

atomic  

NLE Websites -- All DOE Office Websites (Extended Search)

theory and fundamental quantum mechanics In addition to research on hadronic and nuclear physics, we also conduct research in atomic physics, neutron physics, and quantum...

12

HfO2 Gate Dielectric on (NH4)2S Passivated (100) GaAs Grown by Atomic Layer Deposition  

Science Conference Proceedings (OSTI)

The interface between hafnium oxide grown by atomic layer deposition and (100) GaAs treated with HCl cleaning and (NH{sub 4}){sub 2}S passivation has been characterized. Synchrotron radiation photoemission core level spectra indicated successful removal of the native oxides and formation of passivating sulfides on the GaAs surface. Layer-by-layer removal of the hafnia film revealed a small amount of As{sub 2}O{sub 3} formed at the interface during the dielectric deposition. Traces of arsenic and sulfur out-diffusion into the hafnia film were observed after a 450 C post-deposition anneal, and may be the origins for the electrically active defects. Transmission electron microscopy cross section images showed thicker HfO{sub 2} films for a given precursor exposure on S-treated GaAs versus the non-treated sample. In addition, the valence-band and the conduction-band offsets at the HfO{sub 2}/GaAs interface were deduced to be 3.18 eV and a range of 0.87-0.97 eV, respectively. It appears that HCl+(NH{sub 4})2{sub S} treatments provide a superior chemical passivation for GaAs and initial surface for ALD deposition.

Chen, P.T.; /Stanford U., Materials Sci. Dept.; Sun, Y.; /SLAC, SSRL; Kim, E.; McIntyre, P.C.; /Stanford U., Materials Sci. Dept.; Tsai, W.; Garner, M.; /Intel, Santa Clara; Pianetta, P.; /SLAC, SSRL; Nishi, Y.; /Stanford U., Elect. Eng. Dept.; Chui, C.O.; /UCLA

2007-09-28T23:59:59.000Z

13

Atomic-Scale Investigation of Epitaxial Graphene Grown on 6H-SiC(0001) Using Scanning Tunneling Microscopy and Spectroscopy  

E-Print Network (OSTI)

. Typically, the atomic structures of the graphene were resolved at sample bias voltages below 0.5 V graphene continuously extended across four SiC bilayers, as confirmed by the line profile. A height .) 13346 J. Phys. Chem. C, Vol. 114, No. 31, 2010 Choi et al. #12;shaped protrusions at high bias voltage

Kim, Sehun

14

Atomic Control of Conductivity Versus Ferromagnestism in Wide-Gap Oxides via Selective Doping: V, Nb, Ta in Anatase TiO2  

Science Conference Proceedings (OSTI)

We identify two general types of electronic behaviors for transition-metal impurities that introduce excess electrons in oxides. (1) The dopants introduce resonant states inside the host conduction band and produce free electrons; (2) the dopants introduce a deep gap state that carries a magnetic moment. By combining electronic structure calculations, thermodynamic simulations, and percolation theory, we quantify these behaviors for the case of column V-B dopants in anatase TiO{sub 2}. Showing behavior (1), Nb and Ta dopants can convert the insulator TiO{sub 2} into a transparent conductor. Showing behavior (2), V dopants could convert nonmagnetic TiO{sub 2} into a ferromagnet. Whether a dopant shows behavior (1) or (2) is encoded in its atomic d orbital energy.

Osorio-Guillen, J.; Lany, S.; Zunger, A.

2008-01-01T23:59:59.000Z

15

NIST: Atomic Spectroscopy Group - Homepage  

Science Conference Proceedings (OSTI)

... The program in atomic spectroscopy at NIST provides accurate reference data on spectral lines and energy levels for a wide variety of important ...

2013-07-31T23:59:59.000Z

16

NIST Atomic Physics Division 2000 - Technical Highlights  

Science Conference Proceedings (OSTI)

... Astrophysical Quantities," a handbook widely used ... and single-atom chemistry, where controlled ... understanding of fundamental processes occurring ...

17

Island Wide Management Corporation  

Office of Legacy Management (LM)

9 1986 9 1986 Island Wide Management Corporation 3000 Marcus Avenue Lake Success, New York 11042 Dear Sir or Madam: I am sending you this letter and the enclosed information as you have been identified by L. I. Trinin of Glick Construction Company as the representatives of the owners of the property that was formerly the site of the Sylvania-Corning Nuclear Corporation in Bayside, New York. The Department of Energy is evaluating the radiological condition of sites that were utilized under the Manhattan Engineer District and/or the Atomic Energy Commission in the early years of nuclear energy development to determine whether they need remedial action and whether the Department has authority to perform such action. As you may know, the former Sylvania-Corning Corporation Bayside site was identified as one such site.

18

Atomic History  

Science Conference Proceedings (OSTI)

... These Data Centers, one on Atomic Energy Levels and one on Atomic Transition ... After a few years Kessler went on to higher management at NIST. ...

2010-10-05T23:59:59.000Z

19

Texture of atomic layer deposited ruthenium  

Science Conference Proceedings (OSTI)

Ruthenium films were grown by plasma enhanced atomic layer deposition (ALD) on Si(100) and ALD TiN. X-ray diffraction (XRD) showed that the as-deposited films on Si(100) were polycrystalline, on TiN they were (002) oriented. After annealing at 800^oC ... Keywords: Ammonia plasma, Atomic layer deposition, Ruthenium, Silicide, Texture

J. Musschoot; Q. Xie; D. Deduytsche; K. De Keyser; D. Longrie; J. Haemers; S. Van den Berghe; R. L. Van Meirhaeghe; J. D'Haen; C. Detavernier

2010-10-01T23:59:59.000Z

20

Understanding the defect structure of solution grown zinc oxide  

Science Conference Proceedings (OSTI)

Zinc oxide (ZnO) is a wide bandgap semiconducting oxide with many potential applications in various optoelectronic devices such as light emitting diodes (LEDs) and field effect transistors (FETs). Much effort has been made to understand the ZnO structure and its defects. However, one major issue in determining whether it is Zn or O deficiency that provides ZnO its unique properties remains. X-ray absorption spectroscopy (XAS) is an ideal, atom specific characterization technique that is able to probe defect structure in many materials, including ZnO. In this paper, comparative studies of bulk and aqueous solution grown ({lighting and other optoelectronic device applications. - Graphical abstract: Highlights: Black-Right-Pointing-Pointer ZnO powders have been synthesized through an aqueous solution method. Black-Right-Pointing-Pointer Defect structure studied using XAS and XPDF. Black-Right-Pointing-Pointer Zn-Zn correlations are less in the ZnO powders synthesized in solution than bulk. Black-Right-Pointing-Pointer Zn vacancies are present in the powders synthesized. Black-Right-Pointing-Pointer EXAFS and XPDF, when used complementary, are useful characterization techniques.

Liew, Laura-Lynn [Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A-STAR), 3 Research Link, Singapore 117602 (Singapore); School of Materials Science and Engineering, Nanyang Technological University, Block N4.1 Nanyang Avenue, Singapore 639798 (Singapore); Sankar, Gopinathan, E-mail: g.sankar@ucl.ac.uk [Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ (United Kingdom); Handoko, Albertus D. [Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A-STAR), 3 Research Link, Singapore 117602 (Singapore); Goh, Gregory K.L., E-mail: g-goh@imre.a-star.edu.sg [Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A-STAR), 3 Research Link, Singapore 117602 (Singapore); School of Materials Science and Engineering, Nanyang Technological University, Block N4.1 Nanyang Avenue, Singapore 639798 (Singapore); Kohara, Shinji [Japan Synchrotron Radiation Research Institute (JASRI), Mikazuki, Sayo, Hyogo 679-5198 (Japan)

2012-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Island Wide Management Corporation  

Office of Legacy Management (LM)

as one such site. The corporation conducted research and development work for the Atomic Energy Commission from the late 1940's to the early 1960's. As indicated in the...

22

NNSA-Wide  

National Nuclear Security Administration (NNSA)

NNSA-Wide Fiscal Year 2012 Year-End Workforce Diversity Office of Civil Rights NA-1.2 Albuquerque Complex PO Box 5400 Albuquerque, NM 87185 Phone (505) 845-5517 Fax (505) 845-4963...

23

Structure of droplet-epitaxy-grown InAs/GaAs quantum dots  

Science Conference Proceedings (OSTI)

We have used a direct x-ray phasing method, coherent Bragg rod analysis, to obtain sub-angstrom resolution electron density maps of the InAs/GaAs dot system. The dots were grown by the droplet heteroepitaxy (DHE) technique and their structural and compositional properties are compared with those of dots grown by the strain-driven Stranski-Krastanov method. Our results show that the Ga diffusion into the DHE-grown dots is somewhat larger; however, other characteristics such as the composition of the dots uppermost layers, the interlayer spacing, and the bowing of the atomic layers are similar.

Cohen, Eyal; Yochelis, Shira; Westreich, Ohad; Shusterman, Sergey; Kumah, Divine P.; Clarke, Roy; Yacoby, Yizhak; Paltiel, Yossi (Michigan); (Hebrew); (Soreq NRC, Israel)

2011-09-06T23:59:59.000Z

24

Atom-light interactions in ultracold anisotropic media  

E-Print Network (OSTI)

A series of studies on atom-light interactions in ultracold anisotropic media were conducted. Methods to trap ultracold neutral atoms in novel traps with widely tunable trap frequencies and anisotropies were investigated. ...

Vengalattore, Mukund T., 1977-

2005-01-01T23:59:59.000Z

25

Glossary Term - Atomic Number  

NLE Websites -- All DOE Office Websites (Extended Search)

Particle Previous Term (Alpha Particle) Glossary Main Index Next Term (Avogadro's Number) Avogadro's Number Atomic Number Silver's atomic number is 47 The atomic number is equal to...

26

Argonne CNM News: STM of individual grains in CVD-grown graphene  

NLE Websites -- All DOE Office Websites (Extended Search)

STM of individual grains in CVD-grown graphene STM of individual grains in CVD-grown graphene SEM of 3d supercrystals The first scanning tunneling microscopy (STM) images of graphene synthesized on copper foil. (b-d) show atomic-resolution images at various locations of the large graphene domain shown in (a). NMAT June 2011 Users from Purdue University, working collaboratively with staff in the Electronic & Magnetic Materials & Devices Group, studied CVD-grown graphene on polycrystalline copper foil for the first time at the atomic-scale. The ultrahigh vacuum scanning tunneling microscopy (UHV-STM) findings performed at the Center for Nanoscale Materials (CNM) will help to guide the optimization of synthesis towards defect-free graphene. The focus of this study was to investigate the quality of the films and

27

Visitors Far and Wide  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 Visitors Far and Wide From left: Minister Danilov-Daniljan, Evan Mills (Assistant Director, Center for Building Science), Victoria Mats (interpreter and Soviet energy analyst), and Len Grossman (PG&E Energy Center) tour the PG&E Energy Center in San Francisco. The Russian Minister of Ecology and Natural Resources, Victor I. Danilov-Daniljan, spent three days in California as the Center's guest. The Minister presented information on current Soviet energy and environmental dilemmas and participated in a day-long roundtable discussion with representatives of major utilities, manufacturers of energy-efficient technologies, energy regulators, nongovernmental organizations, and Center scientists. Julian Aizenberg, one of the former Soviet Union's (FSU) foremost lighting

28

Atomic Spectroscopy Data Center  

Science Conference Proceedings (OSTI)

Atomic Spectroscopy Data Center. Summary: ... Atomic Spectroscopy Data Webpage. End Date: ongoing. Lead Organizational Unit: physlab. Contact. ...

2013-06-06T23:59:59.000Z

29

the World Wide Web  

Office of Scientific and Technical Information (OSTI)

technical report has been made technical report has been made electronically available on the World Wide Web through a contribution from Walter L. Warnick In honor of Enrico Fermi Leader of the first nuclear reactor, Nobel Prize winner, and visionary technologist Dr. Warnick is delighted to be the first sponsor for posting a Department of Energy technical report and making it broadly available Office of Scientific and Technical Information Office of Science U.S. Department of Energy September 2008 osti.gov U N I T E D S T A T E S A T O M I C E N E R G Y C O M M I S S I O N AECD-3269 EXPERIMENTAL PRODUCTION OF A DNERGENT CHAIN REACTION BY E. Fermi January 4, 1952 [TIS Issuance ate] [chicago University] - T e c h n i c a l I n f o r m a t i o n S e r v i c e , O a k Ridge, T e n n e s s e e r ABSTRACTS Description of the construction and operation of the chain

30

Atomic magnetometer  

SciTech Connect

An atomic magnetometer is disclosed which uses a pump light beam at a D1 or D2 transition of an alkali metal vapor to magnetically polarize the vapor in a heated cell, and a probe light beam at a different D2 or D1 transition to sense the magnetic field via a polarization rotation of the probe light beam. The pump and probe light beams are both directed along substantially the same optical path through an optical waveplate and through the heated cell to an optical filter which blocks the pump light beam while transmitting the probe light beam to one or more photodetectors which generate electrical signals to sense the magnetic field. The optical waveplate functions as a quarter waveplate to circularly polarize the pump light beam, and as a half waveplate to maintain the probe light beam linearly polarized.

Schwindt, Peter (Albuquerque, NM); Johnson, Cort N. (Albuquerque, NM)

2012-07-03T23:59:59.000Z

31

Thermoplastic Composite with Vapor Grown Carbon Fiber.  

E-Print Network (OSTI)

??Vapor grown carbon fiber (VGCF) is a new class of highly graphitic carbon nanofiber and offers advantages of economy and simpler processing over continuous-fiber composites. (more)

Lee, Jaewoo

2005-01-01T23:59:59.000Z

32

Wide-Bandgap Semiconductors  

SciTech Connect

With the increase in demand for more efficient, higher-power, and higher-temperature operation of power converters, design engineers face the challenge of increasing the efficiency and power density of converters [1, 2]. Development in power semiconductors is vital for achieving the design goals set by the industry. Silicon (Si) power devices have reached their theoretical limits in terms of higher-temperature and higher-power operation by virtue of the physical properties of the material. To overcome these limitations, research has focused on wide-bandgap materials such as silicon carbide (SiC), gallium nitride (GaN), and diamond because of their superior material advantages such as large bandgap, high thermal conductivity, and high critical breakdown field strength. Diamond is the ultimate material for power devices because of its greater than tenfold improvement in electrical properties compared with silicon; however, it is more suited for higher-voltage (grid level) higher-power applications based on the intrinsic properties of the material [3]. GaN and SiC power devices have similar performance improvements over Si power devices. GaN performs only slightly better than SiC. Both SiC and GaN have processing issues that need to be resolved before they can seriously challenge Si power devices; however, SiC is at a more technically advanced stage than GaN. SiC is considered to be the best transition material for future power devices before high-power diamond device technology matures. Since SiC power devices have lower losses than Si devices, SiC-based power converters are more efficient. With the high-temperature operation capability of SiC, thermal management requirements are reduced; therefore, a smaller heat sink would be sufficient. In addition, since SiC power devices can be switched at higher frequencies, smaller passive components are required in power converters. Smaller heat sinks and passive components result in higher-power-density power converters. With the advent of the use of SiC devices it is imperative that models of these be made available in commercial simulators. This enables power electronic designers to simulate their designs for various test conditions prior to fabrication. To build an accurate transistor-level model of a power electronic system such as an inverter, the first step is to characterize the semiconductor devices that are present in the system. Suitable test beds need to be built for each device to precisely test the devices and obtain relevant data that can be used for modeling. This includes careful characterization of the parasitic elements so as to emulate the test setup as closely as possible in simulations. This report is arranged as follows: Chapter 2--The testing and characterization of several diodes and power switches is presented. Chapter 3--A 55-kW hybrid inverter (Si insulated gate bipolar transistor--SiC Schottky diodes) device models and test results are presented. A detailed description of the various test setups followed by the parameter extraction, modeling, and simulation study of the inverter performance is presented. Chapter 4--A 7.5-kW all-SiC inverter (SiC junction field effect transistors (JFET)--SiC Schottky diodes) was built and tested. The models built in Saber were validated using the test data and the models were used in system applications in the Saber simulator. The simulation results and a comparison of the data from the prototype tests are discussed in this chapter. Chapter 5--The duration test results of devices utilized in buck converters undergoing reliability testing are presented.

Chinthavali, M.S.

2005-11-22T23:59:59.000Z

33

A World Wide Web Update  

NLE Websites -- All DOE Office Websites (Extended Search)

A World Wide Web Update The Center for Building Science now has a World Wide Web homepage accessible from the general LBL homepage. Through WWW and the Mosaic browser, Internet...

34

Relaxation and critical strain for maximum In incorporation in AlInGaN on GaN grown by metal organic vapour phase epitaxy  

Science Conference Proceedings (OSTI)

Quaternary AlInGaN layers were grown on conventional GaN buffer layers on sapphire by metal organic vapour phase epitaxy at different surface temperatures and different reactor pressures with constant precursor flow conditions. A wide range in compositions within 30-62% Al, 5-29% In, and 23-53% Ga was covered, which leads to different strain states from high tensile to high compressive. From high-resolution x-ray diffraction and Rutherford backscattering spectrometry, we determined the compositions, strain states, and crystal quality of the AlInGaN layers. Atomic force microscopy measurements were performed to characterize the surface morphology. A critical strain value for maximum In incorporation near the AlInGaN/GaN interface is presented. For compressively strained layers, In incorporation is limited at the interface as residual strain cannot exceed an empirical critical value of about 1.1%. Relaxation occurs at about 15 nm thickness accompanied by strong In pulling. Tensile strained layers can be grown pseudomorphically up to 70 nm at a strain state of 0.96%. A model for relaxation in compressively strained AlInGaN with virtual discrete sub-layers, which illustrates the gradually changing lattice constant during stress reduction is presented.

Reuters, Benjamin; Finken, M.; Wille, A.; Kalisch, H.; Vescan, A. [RWTH Aachen University, GaN Device Technology, Sommerfeldstrasse 24, 52074 Aachen (Germany); Juelich Aachen Research Alliance, JARA-FIT, Wilhelm-Johnen-Strasse, 52428 Juelich (Germany); Hollaender, B. [Juelich Aachen Research Alliance, JARA-FIT, Wilhelm-Johnen-Strasse, 52428 Juelich (Germany); Forschungszentrum Juelich GmbH, PGI9-IT, 52425 Juelich (Germany); Heuken, M. [RWTH Aachen University, GaN Device Technology, Sommerfeldstrasse 24, 52074 Aachen (Germany); AIXTRON SE, Kaiserstr. 98, 52134 Herzogenrath (Germany)

2012-11-01T23:59:59.000Z

35

Comparison of electronic structure of as grown and solar grade silicon samples  

Science Conference Proceedings (OSTI)

A comparison of the electronic structure of two different types of silicon materials viz., (i) as grown silicon and (ii) solar silicon has been carried out utilizing maximum entropy method and pair distribution function using powder X-ray data sets. The precise electron density maps have been elucidated for the two samples. The covalent nature of the bonding between atoms in both the samples is found to be well pronounced and clearly seen from the electron density maps. The electron densities at the middle of the Si-Si bond are found to be 0.47 and 0.45 e/A{sup 3} for as grown silicon and solar silicon respectively. In this work, the local structural information has also been obtained by analyzing the atomic pair distribution functions of these two samples.

Saravanan, R., E-mail: saragow@dataone.in; Sheeba, R. A. J. R. [Madura College, Research Centre and PG Department of Physics (India)

2012-04-15T23:59:59.000Z

36

Reading Comprehension - Atomic History  

NLE Websites -- All DOE Office Websites (Extended Search)

Atomic History Atomic History A Greek philosopher named Democritus said that all atoms are small, hard particles. He thought that atoms were made of a single material formed into different shapes and sizes. The word " _________ element compound mixture atom " is derived from the Greek word "atomos" which means "not able to be divided." In 1803, John Dalton, a school teacher, proposed his atomic theory. Dalton's theory states that elements (substances composed of only one type of _________ molecules ions atom ) combine in certain proportions to form _________ compounds atoms mixtures elements . In 1897, a British scientist named J. J. Thomson experimented with a cathode-ray tube which had a positively charged plate. The plate attracted negatively charged particles that we now call _________ protons neutrons

37

The Universe Adventure - Atoms  

NLE Websites -- All DOE Office Websites (Extended Search)

Matter and Atoms Matter and Atoms Richard Feynman "If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generations of creatures, what statement would contain the most information in the fewest words? I believe it is that...all things are made of atoms." -Richard P. Feynman, winner of the 1965 Nobel Prize in Physics All is atoms Matter is made of atoms, and atoms are comprised of protons, neutrons, and electrons. Everything in the Universe is made of matter. Though matter exists in many different forms, each form is made out of the same basic constituents: small particles called atoms. Atoms themselves are made of smaller particles: protons, neutrons, and electrons. Protons and neutrons are composed of even smaller particles called quarks.

38

Atomic and Molecular Physics  

Science Conference Proceedings (OSTI)

... DG, * SRD 105 Physic Laboratory's Elemental ... Nuclear Physics SRD 144 Atomic Weights & ... Physical Constants SRD 121 Fundamental Physical ...

2012-10-10T23:59:59.000Z

39

Atomizing nozzle and process  

DOE Patents (OSTI)

High pressure atomizing nozzle includes a high pressure gas manifold having a divergent expansion chamber between a gas inlet and arcuate manifold segment to minimize standing shock wave patterns in the manifold and thereby improve filling of the manifold with high pressure gas for improved melt atomization. The atomizing nozzle is especially useful in atomizing rare earth-transition metal alloys to form fine powder particles wherein a majority of the powder particles exhibit particle sizes having near-optimum magnetic properties.

Anderson, I.E.; Figliola, R.S.; Molnar, H.M.

1993-07-20T23:59:59.000Z

40

Calibrated Atomic Force Microscopy  

Science Conference Proceedings (OSTI)

... Vorburger, SL Tan, NG Orji, J. Fu, Interlaboratory Comparison of Traceable Atomic Force Microscope Pitch Measurements, SPIE Proceedings Vol. ...

2011-10-28T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

World Wide Web Information Servers  

NLE Websites -- All DOE Office Websites (Extended Search)

World Wide Web Information Servers World Wide Web Information Servers Lawrence Berkeley Laboratory recently announced a gopher and World Wide Web site. To get to the web site, telnet to www.lbl.gov, login: www. Access is provided to LBL's gopher, library catalog, and publication list. The Center is funding the implementation of a WWW network node for on-line access to publications, databases, and documents full of hypermedia links to other documents or information systems from the Energy & Environment Division. Full implementation is expected by May 1994, and will include access to a variety of information from all the research programs and centers. The technology transfer project calls for this newsletter to be published on WWW using the Mosaic interface under development at the National Center

42

Nanoscale structure and transport : from atoms to devices  

E-Print Network (OSTI)

Nanoscale structures present both unique physics and unique theoretical challenges. Atomic-scale simulations can find novel nanostructures with desirable properties, but the search can be difficult if the wide range of ...

Evans, Matthew Hiram

2005-01-01T23:59:59.000Z

43

VENTILATION (HVAC) FAILURE (BUILDING WIDE)  

E-Print Network (OSTI)

VENTILATION (HVAC) FAILURE (BUILDING WIDE) A failure or shutdown of the ventilation system will be signaled by cessation of the audible background "rumbling" sound of the building's HVAC system. As building durations. NOTE: Due to unpredictable pressure differentials in and around the labs during an HVAC failure

Strynadka, Natalie

44

Transport studies on CVD-grown graphene  

E-Print Network (OSTI)

In this thesis, we report transport studies performed on CVD-grown graphene. We perform resistivity and hall measurements on a large-area sample at 4' K. We measure the carrier mobility of the sample and find it to be on ...

Huntley, Miriam Hanna

2009-01-01T23:59:59.000Z

45

Quaternion atomic function wavelet for applications in image processing  

Science Conference Proceedings (OSTI)

Atomic Functions are widely used in different applications in image processing, pattern recognition, computational physics and also in the digital interpretation of signal measurements. The main contribution of this work is to develop a Quaternionic ... Keywords: 2D phase information, atomic functions, image processing, quaternion algebra

E. Ulises Moya-Snchez; Eduardo Bayro-Corrochano

2010-11-01T23:59:59.000Z

46

Wide Bandgap Extrinsic Photoconductive Switches  

SciTech Connect

Photoconductive semiconductor switches (PCSS) have been investigated since the late 1970s. Some devices have been developed that withstand tens of kilovolts and others that switch hundreds of amperes. However, no single device has been developed that can reliably withstand both high voltage and switch high current. Yet, photoconductive switches still hold the promise of reliable high voltage and high current operation with subnanosecond risetimes. Particularly since good quality, bulk, single crystal, wide bandgap semiconductor materials have recently become available. In this chapter we will review the basic operation of PCSS devices, status of PCSS devices and properties of the wide bandgap semiconductors 4H-SiC, 6H-SiC and 2H-GaN.

Sullivan, J S

2012-01-17T23:59:59.000Z

47

Atomic Data for Mercury (Hg)  

Science Conference Proceedings (OSTI)

... Mercury (Hg) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Mercury (Hg). ...

48

Atomic Data for Plutonium (Pu)  

Science Conference Proceedings (OSTI)

... Plutonium (Pu) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Plutonium (Pu). ...

49

Atomic Data for Tungsten (W )  

Science Conference Proceedings (OSTI)

... Tungsten (W) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Tungsten (W). ...

50

Atomic Data for Uranium (U )  

Science Conference Proceedings (OSTI)

... Uranium (U) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Uranium (U). ...

51

Atomic Data for Hydrogen (H )  

Science Conference Proceedings (OSTI)

... Hydrogen (H) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Hydrogen (H). ...

52

Atomic Data for Thorium (Th)  

Science Conference Proceedings (OSTI)

... Thorium (Th) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Thorium (Th). ...

53

ATOMS PEACE WAR Eisenhower  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ATOMS ATOMS PEACE WAR Eisenhower and the Atomic Energy Commission Richard G. Hewlett and lack M. Roll With a Foreword by Richard S. Kirkendall and an Essay on Sources by Roger M. Anders University of California Press Berkeley Los Angeles London Published 1989 by the University of California Press Berkeley and Los Angeles, California University of California Press, Ltd. London, England Prepared by the Atomic Energy Commission; work made for hire. Library of Congress Cataloging-in-Publication Data Hewlett, Richard G. Atoms for peace and war, 1953-1961. (California studies in the history of science) Bibliography: p. Includes index. 1. Nuclear energy-United States-History. 2. U.S. Atomic Energy Commission-History. 3. Eisenhower, Dwight D. (Dwight David), 1890-1969.

54

Metal atom oxidation laser  

DOE Patents (OSTI)

A chemical laser which operates by formation of metal or carbon atoms and reaction of such atoms with a gaseous oxidizer in an optical resonant cavity is described. The lasing species are diatomic or polyatomic in nature and are readily produced by exchange or other abstraction reactions between the metal or carbon atoms and the oxidizer. The lasing molecules may be metal or carbon monohalides or monoxides. (auth)

Jensen, R.J.; Rice, W.W.; Beattie, W.H.

1975-10-28T23:59:59.000Z

55

Metal atom oxidation laser  

DOE Patents (OSTI)

A chemical laser which operates by formation of metal or carbon atoms and reaction of such atoms with a gaseous oxidizer in an optical resonant cavity is described. The lasing species are diatomic or polyatomic in nature and are readily produced by exchange or other abstraction reactions between the metal or carbon atoms and the oxidizer. The lasing molecules may be metal or carbon monohalides or monoxides.

Jensen, R.J.; Rice, W.W.; Beattie, W.H.

1975-10-28T23:59:59.000Z

56

Atomic Spectroscopy: An Introduction  

Science Conference Proceedings (OSTI)

... 60. A. de-Shalit and I. Talmi, Nuclear Shell Theory (Academic, New York, 1963). ... CE Moore, Atomic Energy Levels, Natl. Stand. Ref. ...

57

NIST Atomic Spectra Database  

Science Conference Proceedings (OSTI)

... Ground states and ionization energies of atoms ... the US Department of Energy, by the ... SRDP), and by NIST's Systems Integration for Manufacturing ...

2013-09-12T23:59:59.000Z

58

Cold Atoms News  

Science Conference Proceedings (OSTI)

... the first time caused a gas of atoms ... mysterious data in ultracold gases of rubidium ... Material May Demonstrate Long-Sought 'Liquid' Magnetic State ...

2010-10-20T23:59:59.000Z

59

Atomic Collapse Observed  

NLE Websites -- All DOE Office Websites (Extended Search)

Collapse State Observed Aided by Simulations, Scientists Observe Atomic Collapse State Quantum Mechanics Prediction Confirmed in Graphene Using NERSC's Hopper April 26, 2013 |...

60

The Harnessed Atom  

Energy.gov (U.S. Department of Energy (DOE))

The Harnessed Atom is a new middle school science, technology, engineering, and math (STEM) curriculum extension that focuses on nuclear science and energy. It offers teachers accurate, unbiased,...

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

The ORNL Controlled Fusion Atomic Data Center  

SciTech Connect

The principal mission of the Controlled Fusion Atomic Data Center is the collection evaluation, and dissemination of atomic collision data relevant to fusion energy development. With the advent of the widespread use of the World Wide Web, the data center`s resources are being placed on-line to facilitate their use by end-users (cf. http://www-cfadc.phy.ornl.gov/). As this development continues, initially disparate, individually compiled resources will be transformed into integrated tools for retrieving recommended data, or displaying and manipulating the information available. The data center`s present capabilities, recent data production/evaluation efforts, and goals for future development are highlighted here.

Schultz, D.R.; Krstic, P.S.; Ownby, F.M.; Meyer, F.W.; Havener, C.C.; Bannister, M.E.; Liu, W.; Jeffery, D.J.; Stancil, P.C. [Oak Ridge National Lab., TN (United States). Physics Div.

1997-12-31T23:59:59.000Z

62

Cold Atoms Portal  

Science Conference Proceedings (OSTI)

... Fellowship. News And Events. Key Property of Graphene Sustained Over Wide Ranges of Density and Energy. First Observation ...

2013-09-26T23:59:59.000Z

63

Atomic hydrogen cleaning of semiconductor photocathodes  

DOE Green Energy (OSTI)

Negative Electron Affinity (NEA) semiconductor photocathodes are widely used for the production of polarized electron beams, and are also useful for the production of high brightness electron beams which can be modulated at very high frequencies. Preparation of an atomically clean semiconductor surface is an essential step in the fabrication of a NEA photocathode. This cleaning step is difficult for certain semiconductors, such as the very thin materials which produce the highest beam polarization, and those which have tightly bound oxides and carbides. Using a small RF dissociation atomic hydrogen source, the authors have reproducibly cleaned GaAs wafers which have been only degreased prior to installation in vacuum. They have consistently prepared very high quantum efficiency photocathodes following atomic hydrogen cleaning. Details of their apparatus and most recent results are presented.

Sinclair, C.K.; Poelker, B.M.; Price, J.S. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

1997-06-01T23:59:59.000Z

64

Hard probes of strongly-interacting atomic gases  

SciTech Connect

We investigate properties of an energetic atom propagating through strongly interacting atomic gases. The operator product expansion is used to systematically compute a quasiparticle energy and its scattering rate both in a spin-1/2 Fermi gas and in a spinless Bose gas. Reasonable agreement with recent quantum Monte Carlo simulations even at a relatively small momentum k/kF > 1.5 indicates that our large-momentum expansions are valid in a wide range of momentum. We also study a differential scattering rate when a probe atom is shot into atomic gases. Because the number density and current density of the target atomic gas contribute to the forward scattering only, its contact density (measure of short-range pair correlation) gives the leading contribution to the backward scattering. Therefore, such an experiment can be used to measure the contact density and thus provides a new local probe of strongly interacting atomic gases.

Nishida, Yusuke [Los Alamos National Laboratory

2012-06-18T23:59:59.000Z

65

Materials' Deformation Dynamics at Atomic Scale In situ Atomic ...  

Science Conference Proceedings (OSTI)

Presentation Title, Materials' Deformation Dynamics at Atomic Scale In situ Atomic .... What Can We Learn from Measurements of Li-ion Battery Single Particles?

66

general_atomics.cdr  

NLE Websites -- All DOE Office Websites (Extended Search)

former former General Atomics Hot Cell Facility was constructed in 1959 and operated until 1991. The site encompassed approximately 7,400 square feet of laboratory and remote operations cells. Licensed operations at the facility included receipt, handling, and shipment of radioactive materials; remote handling, examination, and storage of previously irradiated nuclear fuel materials; pilot-scale tritium extraction operations; and development, fabrication, and inspection of uranium oxide-beryllium oxide fuel materials. General Atomics performed most of the work for the federal government. The General Atomics Hot Cell Facility was located in a 60-acre complex 13 miles northwest of downtown San Diego, 1 mile inland from the Pacific Ocean, and approximately 300 feet above sea level. The General Atomics site is in the center of Torrey Mesa Science Center, a 304-acre industrial

67

general_atomics.cdr  

Office of Legacy Management (LM)

from the U.S. Department of Energy (DOE). Discussions between DOE and General Atomics led to an agreed cost-sharing and no-fee arrangement for the decontamination and site...

68

Sharing the atom bomb  

Science Conference Proceedings (OSTI)

Shaken by the devastation of Hiroshima and Nagasaki and fearful that the American atomic monopoly would spark an arms race, Dean Acheson led a push in 1946 to place the bomb-indeed, all atomic energy-under international control. But as the memories of wartime collaboration faded, relations between the superpowers grew increasingly tense, and the confrontational atmosphere undid his proposal. Had Acheson succeeded, the Cold War might not have been. 2 figs.

Chace, J.

1996-01-01T23:59:59.000Z

69

Metal atomization spray nozzle  

DOE Patents (OSTI)

A spray nozzle for a magnetohydrodynamic atomization apparatus has a feed passage for molten metal and a pair of spray electrodes mounted in the feed passage. The electrodes, diverging surfaces which define a nozzle throat and diverge at an acute angle from the throat. Current passes through molten metal when fed through the throat which creates the Lorentz force necessary to provide atomization of the molten metal.

Huxford, Theodore J. (Harriman, TN)

1993-01-01T23:59:59.000Z

70

Metal atomization spray nozzle  

DOE Patents (OSTI)

A spray nozzle for a magnetohydrodynamic atomization apparatus has a feed passage for molten metal and a pair of spray electrodes mounted in the feed passage. The electrodes, diverging surfaces which define a nozzle throat and diverge at an acute angle from the throat. Current passes through molten metal when fed through the throat which creates the Lorentz force necessary to provide atomization of the molten metal. 6 figures.

Huxford, T.J.

1993-11-16T23:59:59.000Z

71

Effects of atomic radiation  

SciTech Connect

This book focuses on the lifelong effects of atomic radiation exposure in language understandable by the concerned layperson or the specialist in another field. The base of knowledge used is the work of the Atomic Bomb Casualty Commission and its successor since 1975 the Radiation Effects Research Foundation. Within the range of Chronic effects on human health the book provides a thorough review, although effects of nonionizing radiation, effects on structures, effects on other living species, and acute effects are not discussed.

Schull, W.J.

1995-12-31T23:59:59.000Z

72

Atomizing nozzle and method  

DOE Patents (OSTI)

A high pressure close-coupled gas atomizing nozzle includes multiple discrete gas jet discharge orifices having aerodynamically designed convergent-divergent geometry with an first converging section communicated to a gas supply manifold and to a diverging section by a constricted throat section to increase atomizing gas velocity. The gas jet orifices are oriented at gas jet apex angle selected relative to the melt supply tip apex angle to establish a melt aspiration condition at the melt supply tip.

Ting, Jason (Ames, IA); Anderson, Iver E. (Ames, IA); Terpstra, Robert L. (Ames, IA)

2000-03-16T23:59:59.000Z

73

Atomic Data for Americium (Am)  

Science Conference Proceedings (OSTI)

... Atomic Number = 95. Atomic Weight = (243). Reference E95. Isotope, Mass, Abundance, Spin, Mag Moment, 241 Am, 241.056823, 0, 5/2, +1.61. ...

74

Questions and Answers - How do atoms form?  

NLE Websites -- All DOE Office Websites (Extended Search)

(Biggest and smallest atom?) Questions and Answers Main Index Next Question (Does gravity affect atoms?) Does gravity affect atoms? How do atoms form? The current view is that...

75

Questions and Answers - Can you crush atoms?  

NLE Websites -- All DOE Office Websites (Extended Search)

Does gravity affect atoms? Previous Question (Does gravity affect atoms?) Questions and Answers Main Index Next Question (Parts and weights of atoms?) Parts and weights of atoms?...

76

Peaceful Uses of the Atom and Atoms for Peace  

Office of Scientific and Technical Information (OSTI)

Peaceful Uses of the Atom Peaceful Uses of the Atom Fermi and Atoms for Peace · Understanding the Atom · Seaborg · Teller Atoms for Peace Atoms for Peace + 50 - Conference, October 22, 2003 Celebrating the 50th anniversary of President Eisenhower's "Atoms for Peace" speech to the UN General Assembly Atoms for Peace (video 12:00 Minutes) Atoms for Peace Address given by Dwight D. Eisenhower before the General Assembly of the United Nations, New York City, December 8, 1953 Documents: Atomic Power in Space: A History A history of the Space Isotope Power Program of the United States from the mid-1950s through 1982; interplanetary space exploration successes and achievements have been made possible by this technology. Establishing Site X: Letter, Arthur H. Compton to Enrico Fermi, September 14, 1942

77

Czochralski Grown Ce,Gd:YAG Single Crystals  

Science Conference Proceedings (OSTI)

In this work we propose a new concept of white LED, based on the single crystal phosphor plates (SCPPs) of Czochralski grown Ce,Gd:YAG single crystal.

78

Ultra wide-bandwidth micro energy harvester  

E-Print Network (OSTI)

An ultra wide-bandwidth resonating thin film PZT MEMS energy harvester has been designed, modeled, fabricated and tested. It harvests energy from parasitic ambient vibration at a wide range of amplitude and frequency via ...

Hajati, Arman

2011-01-01T23:59:59.000Z

79

NIST Atomic Spectroscopy Data Center  

Science Conference Proceedings (OSTI)

Atomic Spectroscopy Data Center. ... Responds to user requests for data, literature references, and technical information. ...

2011-11-29T23:59:59.000Z

80

Lesson 3- Atoms and Isotopes  

Energy.gov (U.S. Department of Energy (DOE))

Youve probably heard people refer to nuclear energy as atomic energy. Why? Nuclear energy is the energy that is stored in the bonds of atoms, inside the nucleus. Nuclear power plants are designed to capture this energy as heat and convert it to electricity. This lesson looks closely at what atoms are and how atoms store energy.

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

general_atomics.cdr  

Office of Legacy Management (LM)

former General former General Atomics Hot Cell Facility was constructed in 1959 and operated until 1991. The site encompassed approximately 7,400 square feet of laboratory and remote operations cells. Licensed operations at the facility included receipt, handling, and shipment of radioactive materials; remote handling, examination, and storage of previously irradiated nuclear fuel materials; pilot-scale tritium extraction operations; and development, fabrication, and inspection of uranium oxide-beryllium oxide fuel materials. General Atomics performed most of the work for the federal government. The General Atomics Hot Cell Facility was located in a 60-acre complex 13 miles northwest of downtown San Diego, 1 mile inland from the Pacific Ocean, and approximately 300 feet above sea level.

82

Isotropically sensitive optical filter employing atomic resonance transitions  

DOE Patents (OSTI)

An ultra-high Q isotropically sensitive optical filter or optical detector employing atomic resonance transitions. More specifically, atomic resonance transitions utilized in conjunction with two optical bandpass filters provide an optical detector having a wide field of view (.about.2.pi. steradians) and very narrow acceptance bandwidth approaching 0.01 A. A light signal to be detected is transmitted through an outer bandpass filter into a resonantly absorbing atomic vapor, the excited atomic vapor then providing a fluorescence signal at a different wavelength which is transmitted through an inner bandpass filter. The outer and inner bandpass filters have no common transmission band, thereby resulting in complete blockage of all optical signals that are not resonantly shifted in wavelength by the intervening atomic vapor. Two embodiments are disclosed, one in which the light signal raises atoms contained in the atomic vapor from the ground state to an excited state from which fluorescence occurs, and the other in which a pump laser is used to raise the atoms in the ground state to a first excited state from which the light signal then is resonantly absorbed, thereby raising the atoms to a second excited state from which fluorescence occurs. A specific application is described in which an optical detector according to the present invention can be used as an underwater detector for light from an optical transmitter which could be located in an orbiting satellite.

Marling, John B. (Livermore, CA)

1981-01-01T23:59:59.000Z

83

Comprehensive online Atomic Database Management System (DBMS) with Highly Qualified Computing Capabilities  

E-Print Network (OSTI)

The intensive need of atomic data is expanding continuously in a wide variety of applications (e.g. fusion energy and astrophysics, laser-produced, plasma researches, and plasma processing).This paper will introduce our ongoing research work to build a comprehensive, complete, up-to-date, user friendly and online atomic Database Management System (DBMS) namely called AIMS by using SQLite (http://www.sqlite.org/about.html)(8). Programming language tools and techniques will not be covered here. The system allows the generation of various atomic data based on professional online atomic calculators. The ongoing work is a step forward to bring detailed atomic model accessible to a wide community of laboratory and astrophysical plasma diagnostics. AIMS is a professional worldwide tool for supporting several educational purposes and can be considered as a complementary database of IAEA atomic databases. Moreover, it will be an exceptional strategy of incorporating the output data of several atomic codes to external ...

Tahat, Amani

2011-01-01T23:59:59.000Z

84

SPARC: The Stored Particle Atomic Research Collaboration At FAIR  

Science Conference Proceedings (OSTI)

The future international accelerator Facility for Antiproton and Ion Research (FAIR) encompasses 4 scientific pillars containing at this time 14 approved technical proposals worked out by more than 2000 scientists from all over the world. They offer a wide range of new and challenging opportunities for atomic physics research in the realm of highly-charged heavy ions and exotic nuclei. As one of the backbones of the Atomic, Plasma Physics and Applications (APPA) pillar, the Stored Particle Atomic Physics Research Collaboration (SPARC) has organized tasks and activities in various working groups for which we will present a concise survey on their current status.

Stoehlker, Th. [Helmholtz-Zentrum fuer Schwerionenforschung GSI, Darmstadt (Germany); Helmholtz-Institut Jena, Jena (Germany); Physikalisches Institut, Ruprecht-Karls Universitaet Heidelberg (Germany); ExtreMe Matter Institute EMMI and Research Division, Helmholtz-Zentrum fuer Schwerionenforschung GSI, Darmstadt (Germany); Beyer, H. F.; Braeuning-Demian, A.; Brandau, C.; Herfurth, F.; Kozhuharov, Ch.; Kuehl, Th.; Liesen, D.; Litvinov, Yu.; Noertershaeuser, W.; Kester, O.; Quint, W.; Spillmann, U.; Winters, D. [Helmholtz-Zentrum fuer Schwerionenforschung GSI, Darmstadt (Germany); Gumberidze, A. [ExtreMe Matter Institute EMMI and Research Division, Helmholtz-Zentrum fuer Schwerionenforschung GSI, Darmstadt (Germany); Frankfurt Institute for Advanced Studies FIAS, Johann Wolfgang Goethe Universitaet Frankfurt (Germany); Grisenti, R. E.; Petridis, N. [Institut fuer Kernphysik, Johann Wolfgang Goethe Universitaet Frankfurt (Germany); Hagmann, S. [Helmholtz-Zentrum fuer Schwerionenforschung GSI, Darmstadt (Germany); Institut fuer Kernphysik, Johann Wolfgang Goethe Universitaet Frankfurt (Germany); Maertin, R. [Helmholtz-Zentrum fuer Schwerionenforschung GSI, Darmstadt (Germany); Physikalisches Institut, Ruprecht-Karls Universitaet Heidelberg (Germany); Schramm, U. [FZD Forschungszentrum Dresden- Rossendorf (Germany)

2011-06-01T23:59:59.000Z

85

JILA Researchers Discover Atomic Clock Can Simulate ...  

Science Conference Proceedings (OSTI)

... Artist's conception of interactions among atoms in JILA's strontium atomic clock during a quantum simulation experiment. ...

2013-08-20T23:59:59.000Z

86

Enterprise-Wide Agreements | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Enterprise-Wide Enterprise-Wide Agreements Enterprise-Wide Agreements DOE's Office of the Chief Information Officer (OCIO) has designed the IT Acquisition: Enterprise-Wide Agreement (EWA) Program to develop and implement policies and procedures that support the identification, acquisition, oversight and compliance of enterprise licenses. EWAs are Department-wide acquisitions of widely used commercial software. The EWA Program has two core objectives to achieve the Program mission : Maximizing IT buying power and reducing total cost of ownership; Streamlining the IT total acquisition lifecycle. The EWA Program applies a centralized, cross-functional, strategic enterprise software solutions approach. The EWA Program leverages opportunities to create efficiencies and enhances the value of IT

87

Interconnection-Wide Transmission Planning Initiative: Topic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency...

88

Interconnection-Wide Transmission Planning Initiative: Topic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection...

89

WIDE BAND REGENERATIVE FREQUENCY DIVIDER AND MULTIPLIER  

DOE Patents (OSTI)

A regenerative frequency divider and multiplier having wide band input characteristics is presented. The circuit produces output oscillations having frequencies related by a fixed ratio to input oscillations over a wide band of frequencies. In accomplishing this end, the divider-multiplier includes a wide band input circuit coupled by mixer means to a wide band output circuit having a pass band related by a fixed ratio to that of the input circuit. A regenerative feedback circuit derives a fixed frequency ratio feedback signal from the output circuit and applies same to the mixer means in proper phase relation to sustain fixed frequency ratio oscillations in the output circuit.

Laine, E.F.

1959-11-17T23:59:59.000Z

90

HY RID WIDE RANGE TRANSIMPEDAN E AMPLIFIER  

TRANSIMPEDAN E AMPLIFIER TE HNOLOGY SUMMARY Many applications require wide range detection, where detector current is converted to a voltage by a

91

Wide Electrochemical Window Solvents - Energy Innovation Portal  

Biomass and Biofuels; ... This solvent has such a wide electrochemical window and such powerful solvating properties that it is an excellent target solvent ...

92

Shape coexistence in atomic nuclei  

Science Conference Proceedings (OSTI)

Shape coexistence in nuclei appears to be unique in the realm of finite many-body quantum systems. It differs from the various geometrical arrangements that sometimes occur in a molecule in that in a molecule the various arrangements are of the widely separated atomic nuclei. In nuclei the various ''arrangements'' of nucleons involve (sets of) energy eigenstates with different electric quadrupole properties such as moments and transition rates, and different distributions of proton pairs and neutron pairs with respect to their Fermi energies. Sometimes two such structures will ''invert'' as a function of the nucleon number, resulting in a sudden and dramatic change in ground-state properties in neighboring isotopes and isotones. In the first part of this review the theoretical status of coexistence in nuclei is summarized. Two approaches, namely, microscopic shell-model descriptions and mean-field descriptions, are emphasized. The second part of this review presents systematic data, for both even- and odd-mass nuclei, selected to illustrate the various ways in which coexistence is observed in nuclei. The last part of this review looks to future developments and the issue of the universality of coexistence in nuclei. Surprises continue to be discovered. With the major advances in reaching to extremes of proton-neutron number, and the anticipated new ''rare isotope beam'' facilities, guidelines for search and discovery are discussed.

Heyde, Kris; Wood, John L. [Department of Physics and Astronomy, Ghent University, Proeftuinstraat 86, B-9000 Gent (Belgium); School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430 (United States)

2011-10-01T23:59:59.000Z

93

Tenth Atomic Physics Program workshop  

Science Conference Proceedings (OSTI)

This report contains short papers and abstracts on the following main topics: Ion-atom collision theory; laser physics; spectroscopy of atoms; spectroscopy of ions; and high velocity collisions.

Not Available

1989-10-01T23:59:59.000Z

94

Nuclear effects in atomic transitions  

E-Print Network (OSTI)

Atomic electrons are sensitive to the properties of the nucleus they are bound to, such as nuclear mass, charge distribution, spin, magnetization distribution, or even excited level scheme. These nuclear parameters are reflected in the atomic transition energies. A very precise determination of atomic spectra may thus reveal information about the nucleus, otherwise hardly accessible via nuclear physics experiments. This work reviews theoretical and experimental aspects of the nuclear effects that can be identified in atomic structure data. An introduction to the theory of isotope shifts and hyperfine splitting of atomic spectra is given, together with an overview of the typical experimental techniques used in high-precision atomic spectroscopy. More exotic effects at the borderline between atomic and nuclear physics, such as parity violation in atomic transitions due to the weak interaction, or nuclear polarization and nuclear excitation by electron capture, are also addressed.

Plffy, Adriana

2011-01-01T23:59:59.000Z

95

Atomic Devices and Instrumentation Group  

Science Conference Proceedings (OSTI)

... 2001 and 2005, demonstrated an atomic clock physics package with ... magnetometers for magnetic anomaly detection, nuclear magnetic resonance ...

2013-08-09T23:59:59.000Z

96

Atom-Based Dimensional Metrology  

Science Conference Proceedings (OSTI)

... Awarded a five year, three phase DARPA contract to conduct collaborative research in atomically precise positioning, patterning and metrology ...

2013-04-19T23:59:59.000Z

97

Why is hydrogen's atomic number 1?  

NLE Websites -- All DOE Office Websites (Extended Search)

the number of protons in an atom's nucleus. Hydrogen's atomic number is 1 because all hydrogen atoms contain exactly one proton. Author: Steve Gagnon, Science Education Specialist...

98

NIST: Phys. Lab. Brochure; Atomic Physics Div.  

Science Conference Proceedings (OSTI)

... ultra-cold atoms and investigate atom optics for innovative instrumentation. Measure and analyze spectra of highly ionized atoms for fusion energy ...

99

Minirhizotron imaging reveals that nodulation of field-grown...  

NLE Websites -- All DOE Office Websites (Extended Search)

Minirhizotron imaging reveals that nodulation of field-grown soybean is enhanced by free-air CO 2 enrichment only when combined with drought stress Sharon B. Gray A , Reid S....

100

Electron Microscopy Studies of GaP(N,As) Grown on Si  

DOE Green Energy (OSTI)

The objective of this work is to perform transmission electron microscopy (TEM) studies of GaP(N,As) alloys grown by metal-organic chemical vapor deposition (MOCVD) on Si substrates. These alloys are of interest for the fabrication of high-efficiency tandem solar cells based on Si. The results indicated that the nucleation and growth conditions used are critical for obtaining planar epitaxial layers with a low defect density. In particular, antiphase domains are eliminated using a low growth temperature. TEM studies of these alloy layers, which contain only a few percent N, revealed no phase separation. However, electron diffraction studies revealed the first evidence of CuPt-type atomic ordering in these P-rich, dilute nitride alloy layers.

Norman, A. G.; Geisz, J. F.; Olson, J. M.; Jones, K. M.; Al-Jassim, M. M.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Atomic data for fusion  

DOE Green Energy (OSTI)

This report provides a handbook of recommended cross-section and rate-coefficient data for inelastic collisions between hydrogen, helium and lithium atoms, molecules and ions, and encompasses more than 400 different reactions of primary interest in fusion research. Published experimental and theoretical data have been collected and evaluated, and the recommended data are presented in tabular, graphical and parametrized form. Processes include excitation and spectral line emission, charge exchange, ionization, stripping, dissociation and particle interchange reactions. The range of collision energies is appropriate to applications in fusion-energy research.

Hunter, H.T.; Kirkpatrick, M.I.; Alvarez, I.; Cisneros, C.; Phaneuf, R.A. (eds.) [eds.; Barnett, C.F.

1990-07-01T23:59:59.000Z

102

Cancer in atomic bomb survivors  

SciTech Connect

This book presents information on the following topics: sampling of atomic bomb survivors and method of cancer detection in Hiroshima and Nagasaki; atomic bomb dosimetry for epidemiological studies of survivors in Hiroshima and Nagasaki; tumor and tissue registries in Hiroshima and Nagasaki; the cancer registry in Nagasaki, with atomic bomb survivor data, 1973-1977; cancer mortality; methods for study of delayed health effects of a-bomb radiation; experimental radiation carcinogenesis in rodents; leukemia, multiple myeloma, and malignant lymphoma; cancer of the thyroid and salivary glands; malignant tumors in atomic bomb survivors with special reference to the pathology of stomach and lung cancer; colorectal cancer among atomic bomb survivors; breast cancer in atomic bomb survivors; and ovarian neoplasms in atomic bomb survirors.

Shigematsu, I.; Kagan, A.

1986-01-01T23:59:59.000Z

103

Ferromagnetism in Mn-Implanted Epitaxially Grown Ge on Si(100)  

SciTech Connect

We have studied ferromagnetism of Mn-implanted epitaxial Ge films on silicon. The Ge films were grown by ultrahigh vacuum chemical vapor deposition using a mixture of germane (GeH{sub 4}) and methylgermane (CH{sub 3}GeH{sub 3}) gases with a carbon concentration of less than 1 at. %, and observed surface rms roughness of 0.5 nm, as measured by atomic force microscopy. Manganese ions were implanted in epitaxial Ge films grown on Si (100) wafers to an effective concentration of 16, 12, 6, and 2 at. %. Superconducting quantum interference device measurements showed that only the three highest Mn concentration samples are ferromagnetic, while the fourth sample, with [Mn] = 2 at. %, is paramagnetic. X-ray absorption spectroscopy and x-ray magnetic circular dichroism measurements indicate that localized Mn moments are ferromagnetically coupled below the Curie temperature. Isothermal annealing of Mn-implanted Ge films with [Mn] = 16 at. % at 300 C for up to 1200 s decreases the magnetization but does not change the Curie temperature, suggesting that the amount of the magnetic phase slowly decreases with time at this anneal temperature. Furthermore, transmission electron microscopy and synchrotron grazing incidence x-ray diffraction experiments show that the Mn-implanted region is amorphous, and we believe that it is this phase that is responsible for the ferromagnetism. This is supported by our observation that high-temperature annealing leads to recrystallization and transformation of the material into a paramagnetic phase.

Guchhait, S.; Jamil, M.; Ohldag, H.; Mehta, A.; Arenholz, E.; Lian, G.; Li Fatou, A.; Ferrer, D. A.; Markert, J. T.; Colombo, L.; Banerjee, S. K.

2011-01-05T23:59:59.000Z

104

Agency-Wide Screening | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Agency-Wide Screening Agency-Wide Screening Agency-Wide Screening October 16, 2013 - 4:36pm Addthis Federal agencies face energy-related requirements on new construction projects and major renovations. These Federal requirements range from reductions in fossil-fuel use to specifying the use of certain renewable energy technologies. As some agencies have already found out, not all sites or construction projects are created equal. Because many of the requirements are agency-wide, an effective and efficient way to meet these requirements is to consider and identify appropriate locations for these technologies across all agency land and building assets. FEMP can help Federal agencies conduct a renewable energy screening at all of its sites, or just at all of its upcoming construction project

105

China Joins WorldWideScience Alliance  

Office of Scientific and Technical Information (OSTI)

the addition of more Chinese sources to WorldWideScience.org after a successful test period. DOE's Office of Science, through (OSTI), serves as the Operating Agent for...

106

WorldWideScience.org Goes Multilingual  

Office of Scientific and Technical Information (OSTI)

FOR IMMEDIATE RELEASE Friday, June 11, 2010 WorldWideScience.org Goes Multilingual OAK RIDGE, TN - Now you can find non-English scientific literature from databases in...

107

Ultra-wide bandwidth piezoelectric energy harvesting  

E-Print Network (OSTI)

Here, we present an ultra wide-bandwidth energy harvester by exploiting the nonlinear stiffness of a doubly clamped microelectromechanical systems (MEMSs) resonator. The stretching strain in a doubly clamped beam shows a ...

Hajati, Arman

108

Atomic Inference from Weak Gravitational Lensing Data  

SciTech Connect

We present a novel approach to reconstructing the projected mass distribution from the sparse and noisy weak gravitational lensing shear data. The reconstructions are regularized via the knowledge gained from numerical simulations of clusters, with trial mass distributions constructed from n NFW profile ellipsoidal components. The parameters of these ''atoms'' are distributed a priori as in the simulated clusters. Sampling the mass distributions from the atom parameter probability density function allows estimates of the properties of the mass distribution to be generated, with error bars. The appropriate number of atoms is inferred from the data itself via the Bayesian evidence, and is typically found to be small, reecting the quality of the data. Ensemble average mass maps are found to be robust to the details of the noise realization, and succeed in recovering the demonstration input mass distribution (from a realistic simulated cluster) over a wide range of scales. As an application of such a reliable mapping algorithm, we comment on the residuals of the reconstruction and the implications for predicting convergence and shear at specific points on the sky.

Marshall, Phil; /KIPAC, Menlo Park

2005-12-14T23:59:59.000Z

109

Questions and Answers - Does gravity affect atoms?  

NLE Websites -- All DOE Office Websites (Extended Search)

and Answers Main Index Next Question (Can you crush atoms?) Can you crush atoms? Does gravity affect atoms? Gravity affects atoms the same way it affects all other matter. Every...

110

Optics and interferometry with atoms and molecules  

E-Print Network (OSTI)

Interference with atomic and molecular matter waves is a rich branch of atomic physics and quantum optics. It started with atom diffraction from crystal surfaces and the separated oscillatory fields technique used in atomic ...

Cronin, Alexander D.

111

Magnetometry with entangled atomic samples  

E-Print Network (OSTI)

We present a theory for the estimation of a scalar or a vector magnetic field by its influence on an ensemble of trapped spin polarized atoms. The atoms interact off-resonantly with a continuous laser field, and the measurement of the polarization rotation of the probe light, induced by the dispersive atom-light coupling, leads to spin-squeezing of the atomic sample which enables an estimate of the magnetic field which is more precise than that expected from standard counting statistics. For polarized light and polarized atoms, a description of the non-classical components of the collective spin angular momentum for the atoms and the collective Stokes vectors of the light-field in terms of effective gaussian position and momentum variables is practically exact. The gaussian formalism describes the dynamics of the system very effectively and accounts explicitly for the back-action on the atoms due to measurement and for the estimate of the magnetic field. Multi-component magnetic fields are estimated by the measurement of suitably chosen atomic observables and precision and efficiency is gained by dividing the atomic gas in two or more samples which are entangled by the dispersive atom-light interaction.

Vivi Petersen; Lars Bojer Madsen; Klaus Molmer

2004-09-28T23:59:59.000Z

112

Atomic Energy Commission Takes Over Responsibility for all Atomic...  

National Nuclear Security Administration (NNSA)

Takes Over Responsibility for all Atomic Energy Programs | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear...

113

Atomic total energies: Atomic Ref.Data Elec Struc Cal  

Science Conference Proceedings (OSTI)

... These tables contain the atomic total energies and orbital eigenvalues, for the ground electronic configuration of the elements H ... Definition of format ...

114

Atomic total energies: Atomic Ref. Data Elec. Struc. Cal.  

Science Conference Proceedings (OSTI)

... These tables contain the atomic total energies and orbital eigenvalues, for the ground electronic configuration of the elements H ... Definition of format ...

115

Laser Cooling and Cold Atomic Matter  

Science Conference Proceedings (OSTI)

Laser Cooling and Cold Atomic Matter: to advance the understanding and applications of cold atomic matter, including ...

2012-05-30T23:59:59.000Z

116

NIST - Atomic Energy Levels and Spectra Bibliographic ...  

Science Conference Proceedings (OSTI)

... in this database are from Bibliography on Atomic Energy Levels and ... references to atomic transition probabilities, line intensities, or broadening. ...

117

Growth mechanism and surface atomic structure of AgInSe{sub 2}  

Science Conference Proceedings (OSTI)

The growth of (112)A-oriented AgInSe{sub 2} on GaAs (111)A and its surface reconstruction were studied by scanning tunneling microscopy, atomic force microscopy, and other techniques. Films were grown by a sputtering and evaporation method. Topographic STM images reveal that the film grew by atomic incorporation into surface steps resulting from screw dislocations on the surface. The screw dislocation density was {approx}10{sup 10} cm{sup 2}. Atomically resolved images also show that the surface atomic arrangement appears to be similar to that of the bulk, with a spacing of 0.35-0.41 nm. There is no observable reconstruction, which is unexpected for a polar semiconductor surface.

Pena Martin, Pamela; Rockett, Angus A.; Lyding, Joseph [Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, Illinois 61801 (United States); Department of Electrical and Computer Engineering and the Beckman Institute, University of Illinois at Urbana-Champaign, 405 N. Matthews St., Urbana, Illinois 61801 (United States)

2012-07-15T23:59:59.000Z

118

ATOMIC ENERGY COMMISSION  

Office of Legacy Management (LM)

' ' ATOMIC ENERGY COMMISSION Frank K. Pittman, Director, bivisioa of Waste &&gement and s- portation, Headquarters j CONTAMItUTED RX-AEC-OWNED OR LEASED FACILITIES' This memorandum responds to your TWX certain information on the above subject. the documentation necessary to answer your available due to the records disposal vailing at the time of release or From records that are available and from disc&ions with most familiar with the transfer operations, &have the current radiological conditibn of transferred property is adequate under present standards. The following tabulations follow the format suggested in your TWX and are grouped to an operations or contract r+ponsibility. A,I Ex-AEC Storage Sites - I r:/ National Stockpile Site '(NSS) and OperatEonal

119

NIST Atomic Spectra Bibliographic Databases  

Science Conference Proceedings (OSTI)

... The Atomic Energy Levels Data Center and Data Center on ... Reference Data Program (SRDP) and by NIST's Systems Integration for Manufacturing ...

2010-10-05T23:59:59.000Z

120

Technical Highlights Atomic Physics Division  

Science Conference Proceedings (OSTI)

... Physics Division is to develop and apply atomic physics research methods ... community, and to produce and critically compile physical reference data ...

2013-06-04T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Atomic Devices and Instrumentation Group  

Science Conference Proceedings (OSTI)

... ten millionths of a second over the course of one day, and are paving the way for atomic-level timekeeping in portable, battery-operated systems ...

122

Draft Site-Wide Environmental Impact Statement  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site-Wide Environmental Impact Statement Site-Wide Environmental Impact Statement for the Y-12 National Security Complex October 2009 U.S. Department of Energy National Nuclear Security Administration Y-12 Site Office DOE/EIS-0387 COVER SHEET RESPONSIBLE AGENCY: United States (U.S.) Department of Energy (DOE), National Nuclear Security Administration (NNSA) TITLE: Draft Site-wide Environmental Impact Statement for the Y-12 National Security Complex (DOE/EIS-0387) (Draft Y-12 SWEIS) CONTACT: For further information on this SWEIS, For general information on the DOE contact: National Environmental Policy Act (NEPA) process, contact: Pam Gorman Carol Borgstrom, Director Y-12 SWEIS Document Manager Office of NEPA Policy and Compliance, GC-20 Y-12 Site Office U.S. Department of Energy

123

Measurement of the separation between atoms beyond diffraction limit  

E-Print Network (OSTI)

Precision measurement of small separations between two atoms or molecules has been of interest since the early days of science. Here, we discuss a scheme which yields spatial information on a system of two identical atoms placed in a standing wave laser field. The information is extracted from the collective resonance fluorescence spectrum, relying entirely on far-field imaging techniques. Both the interatomic separation and the positions of the two particles can be measured with fractional-wavelength precision over a wide range of distances from bout lambda/550 to lambda/2.

Jun-Tao Chang; Joerg Evers; Marlan O. Scully; M. Suhail Zubairy

2005-08-01T23:59:59.000Z

124

Bi-Sr-Ca-Cu-O thin films grown by flash evaporation and pulsed laser deposition  

E-Print Network (OSTI)

Bismuth-Strontium-Calcium-Copper-Oxide (BSCCO) compounds are an important family of compounds that have one of the highest transition temperatures among all high-temperature superconductors. The compound is known to exist in three distinct phases, commonly referred to as the 2201, 2212 and 2223 phases. Of these three phases, the 2212 and 2223 phases are the most important, as their transition temperature is higher than the boiling point of liquid nitrogen. It is desirable to produce the compound in thin film form, as the bulk samples are normally polycrystalline. This thesis compares thin films produced by two techniques for depositing BSCCO in order to understand the effect of various processing parameters on the final quality of the thin films. Thin films were grown by flash evaporation at Texas A&M University, and by pulsed laser deposition (PLD) at the University of Wollongong, Australia. The latter of these techniques is widely used for growing thin films of various compounds. Single-phase 2212 films were grown on a MgO substrate using the pulsed laser deposition technique from commercially available 2212 powder. The effect of annealing on the thin films was also studied.

Ganapathy Subramanian, Santhana

2003-12-01T23:59:59.000Z

125

Instrumentation and Control Strategies for Plant-Wide and Fleet-Wide Cost Reduction  

Science Conference Proceedings (OSTI)

A more recent product is now available that contains this report, along with additional presentation materials to facilitate its use. See Product 1018109. This report provides guidance arising from the EPRI initiative on IC Strategies for Plant-Wide and Fleet-Wide Cost Reduction. The document describes a wide range of options while emphasizing integrated modernization across the plant or fleet. Coordinated improvements to shared communications and computing infrastructure, plant processes, and organizat...

2007-10-29T23:59:59.000Z

126

Traffic data repository at the WIDE project  

Science Conference Proceedings (OSTI)

It becomes increasingly important for both network researchers and operators to know the trend of network traffic and to find anomaly in their network traffic. This paper describes an on-going effort within the WIDE project to collect a set of free tools ...

Kenjiro Cho; Koushirou Mitsuya; Akira Kato

2000-06-01T23:59:59.000Z

127

Atomic Energy for Military Purposes  

E-Print Network (OSTI)

Atomic Energy for Military Purposes: The Official Report on the Development of the Atomic Bomb member of the project, to draft a report about its activities. Smyth completed the report in the summer, in a censored version. On August 11, 1945, five days after the Allies dropped the first nuclear bomb on Japan

Landweber, Laura

128

THE DEVELOPMENT OF ATOMIC LAW  

SciTech Connect

Since a uniform federal statute hss not been passed in the German Federal Republic, the development of atomic law has centered around the formation of the Federal Ministry for Atomic Affairs, appeal to the German Commission, and the enactment of temporary laws in several of the states. (J.S.R.)

Fischerhof, H.

1958-08-01T23:59:59.000Z

129

AtomicNuclear Properties  

NLE Websites -- All DOE Office Websites (Extended Search)

HTML_PAGES HTML_PAGES This AtomicNuclearProperties page is under intermittent development. Suggestions and comments are welcome. Please report errors. Chemical elements: For entries in red, a pull-down menu permits selection of the physical state. Cryogenic liquid densties are at the boiling point at 1 atm. 0n 1Ps 1H 2He 3Li 4Be 5B 6C 7N 8O 9F 10Ne 11Na 12Mg 13Al 14Si 15P 16S 17Cl 18Ar 19K 20Ca 21Sc 22Ti 23V 24Cr 25Mn 26Fe 27Co 28Ni 29Cu 30Zn 31Ga 32Ge 33As 34Se 35Br 36Kr 37Rb 38Sr 39Y 40Zr 41Nb 42Mo 43Tc 44Ru 45Rh 46Pd 47Ag 48Cd 49In 50Sn 51Sb 52Te 53I 54Xe 55Cs 56Ba 57La 72Hf 73Ta 74W 75Re 76Os 77Ir 78Pt 79Au 80Hg 81Tl 82Pb 83Bi 84Po 85At 86Rn 87Fr 88Ra 89Ac 104Rf 105Db 106Sg 107Bh 108Hs 109Mt 110Ds 111Rg 112 113 114 115 116 mt 118

130

Chloroform cometabolism by butane-grown CF8, Pseudomonas butanovora, and Mycobacterium vaccae JOB5 and methane-grown Methylosinus trichosporium  

E-Print Network (OSTI)

Chloroform cometabolism by butane-grown CF8, Pseudomonas butanovora, and Mycobacterium vaccae JOB5 AND ENVIRONMENTAL MICROBIOLOGY 63 (9): 3607-3613 SEP 1997 Abstract: Chloroform (CF) degradation by a butane-grown enrichment culture, CF8, was compared to that by butane-grown Pseudomonas butanovora and Mycobacterium vaccae

Semprini, Lewis

131

Atomic, Molecular & Optical Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

Atomic, Molecular and Optical Sciences Atomic, Molecular and Optical Sciences The goal of the program is to understand the structure and dynamics of atoms and molecules using photons and ions as probes. The current program is focussed on studying inner-shell photo-ionization and photo-excitation of atoms and molecules, molecular orientation effects in slow collisions, slowing and cooling molecules, and X-ray photo-excitation of laser-dressed atoms. The experimental and theoretical efforts are designed to break new ground and to provide basic knowledge that is central to the programmatic goals of the Department of Energy (DOE). Unique LBNL facilities such as the Advanced Light Source (ALS), the ECR ion sources at the 88-inch cyclotron, and the National Energy Research Scientific Computing Center (NERSC) are

132

Spectral Emission of Moving Atom  

E-Print Network (OSTI)

A renewed analysis of the H.E. Ives and G.R. Stilwell's experiment on moving hydrogen canal rays (J. Opt. Soc. Am., 1938, v.28, 215) concludes that the spectral emission of a moving atom exhibits always a redshift which informs not the direction of the atom's motion. The conclusion is also evident from a simple energy relation: atomic spectral radiation is emitted as an orbiting electron consumes a portion of its internal energy on transiting to a lower-energy state which however has in a moving atom an additional energy gain; this results in a redshift in the emission frequency. Based on auxiliary experimental information and a scheme for de Broglie particle formation, we give a vigorous elucidation of the mechanism for deceleration radiation of atomic electron; the corresponding prediction of the redshift is in complete agreement with the Ives and Stilwell's experimental formula.

J. X. Zheng-Johansson

2006-06-17T23:59:59.000Z

133

ORNL-grown oxygen 'sponge' presents path to better catalysts...  

NLE Websites -- All DOE Office Websites (Extended Search)

presents path to better catalysts, energy materials This schematic depicts a new ORNL-developed material that can easily absorb or shed oxygen atoms. This schematic depicts...

134

Anticipating the atom: popular perceptions of atomic power before Hiroshima  

E-Print Network (OSTI)

Before Hiroshima made the Bomb an object of popular concern, possible implications and applications of atomic physics had been discussed in the public forum. The new science of X-rays and radium promised the possibilities of unlimited energy and the transmutation of elements in the two decades leading up to World War 1. During the twenties, as scientific method struggled to keep pace with atomic theory, discussion centered on the feasibility of atomic disintegration as an energy source and the many uses of radium. The 1927 case of the New Jersey Radium Dial Painters, who sued their employers for compensation after contracting radium poisoning, revealed a dark side to the new science, that, along with the development of artificial radioactive isotopes by the Jollot-Curies in Paris, and, in Italy, Enrico Fenni's neutron bombardment experiments, sobered attitudes toward the ever-increasing probability of atomic power. When Otto Hahn finally split the atom in 1938, it opened the way to the practical industrial use of atomic fission, and stimulated a flurry of newspaper and magazine articles before World War 11 brought about censorship. Popular entertainment through 1945 reflects the extent to which atomic power had entered the public awareness. Atomic themes and motifs appeared in English language fiction as early as 1895, as did discussions of the social implications of the new science. Such popular culture imagery, including motion pictures and comic book superheroes, that presented the atom to mass audiences provide insight into the popular perceptions at the time, and to the shaping of attitudes toward the Bomb after Hiroshima.

d'Emal, Jacques-Andre Christian

1994-01-01T23:59:59.000Z

135

Manhattan Project: Adventures Inside the Atom  

Office of Scientific and Technical Information (OSTI)

ADVENTURES INSIDE THE ATOM ADVENTURES INSIDE THE ATOM General Electric, National Archives (1948) Resources > Library Below is Adventures Inside the Atom, a comic book history of nuclear energy that was produced in 1948 by the General Electric Company. Scroll down to view the full-size images of each page. This publication was produced at the request of the the Assistant Manager for Public Education, Oak Ridge Operations Office, Atomic Energy Commission. It is reproduced here via the National Archives. Adventures Inside the Atom, p. 1 Adventures Inside the Atom, p. 2 Adventures Inside the Atom, p. 3 Adventures Inside the Atom, p. 4 Adventures Inside the Atom, p. 5 Adventures Inside the Atom, p. 6 Adventures Inside the Atom, p. 7 Adventures Inside the Atom, p. 8 Adventures Inside the Atom, p. 9

136

In-situ control system for atomization  

DOE Patents (OSTI)

Melt atomizing apparatus comprising a melt supply orifice for supplying the melt for atomization and gas supply orifices proximate the melt supply orifice for supplying atomizing gas to atomize the melt as an atomization spray is disclosed. The apparatus includes a sensor, such as an optical and/or audio sensor, for providing atomization spray data, and a control unit responsive to the sensed atomization spray data for controlling at least one of the atomizing gas pressure and an actuator to adjust the relative position of the gas supply orifice and melt supply in a manner to achieve a desired atomization spray. 3 figs.

Anderson, I.E.; Figliola, R.S.; Terpstra, R.L.

1995-06-13T23:59:59.000Z

137

In-situ control system for atomization  

DOE Patents (OSTI)

Melt atomizing apparatus comprising a melt supply orifice for supplying the melt for atomization and gas supply orifices proximate the melt supply orifice for supplying atomizing gas to atomize the melt as an atomization spray. The apparatus includes a sensor, such as an optical and/or audio sensor, for providing atomization spray data, and a control unit responsive to the sensed atomization spray data for controlling at least one of the atomizing gas pressure and an actuator to adjust the relative position of the gas supply orifice and melt supply in a manner to achieve a desired atomization spray.

Anderson, Iver E. (Ames, IA); Figliola, Richard S. (Central, SC); Terpstra, Robert L. (Ames, IA)

1995-06-13T23:59:59.000Z

138

DFAS Wide-Area Workflow Issues  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DFAS Wide-Area Workflow DFAS Wide-Area Workflow Issues Mark Shvartzman Sr. Project Manager, CEM, CEA Southern California Edison Presented at the Spring FUPWG Meeting April 20, 2011 What We Are Going to Discuss * Review Delivery Order or Task Order for accounting lines information. * Contact Contracting Officer or Contracting specialist and request Pay DoDAAC and Ext. information * Create Payment Log by ACRN * Start creating Invoice How the WAWF works and how to navigate through: 2 CONTRACT N68711-03-G-4019 DO#0028 Pay Records Bill by CLIN Award $ by CLIN Billed To Date Invoice number Pay Total Balance by CLIN 7500009733 $330,899.11 CLIN 0001AA 674,220.00 674,220.00 7500009733 7500012596 674,220.00 0.00 7500012596 $641,344.69 CLIN 0001AB 325,780.00 298023.8 27,756.20 7500012596 7500015079 325,780.00

139

Supersonic coal water slurry fuel atomizer  

DOE Patents (OSTI)

A supersonic coal water slurry atomizer utilizing supersonic gas velocities to atomize coal water slurry is provided wherein atomization occurs externally of the atomizer. The atomizer has a central tube defining a coal water slurry passageway surrounded by an annular sleeve defining an annular passageway for gas. A converging/diverging section is provided for accelerating gas in the annular passageway to supersonic velocities.

Becker, Frederick E. (Reading, MA); Smolensky, Leo A. (Concord, MA); Balsavich, John (Foxborough, MA)

1991-01-01T23:59:59.000Z

140

Industry-Wide Database: Circuit Breakers  

Science Conference Proceedings (OSTI)

Best practice maintenance and asset management decisions are based on risks associated with actual equipment condition and performance. However, little effort has been made to systematically collect and analyze such industry information for high-voltage circuit breakers. This document presents the results of the initial effort of the Electric Power Research Institute (EPRI) to explore the development of an industry-wide database (IDB) for high-voltage circuit breakers (HVCBs). The project identified ...

2012-12-12T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

TCP performance analysis for wide area networks  

SciTech Connect

Even though networks have been getting faster, perceived throughput at the application level has not increased accordingly. In an attempt to identify many of the performance bottlenecks, we collected and analyzed data over a wide area network (WAN) at T3 (45 Mbps) bandwidth. The information gained will assist in designing new protocols and/or algorithms that are consistent with future high- speed requirements.

Chen, H.Y.; Hutchins, J.A. [Sandia National Labs., Livermore, CA (United States); Testi, N. [Sandia National Labs., Albuquerque, NM (United States)

1993-08-01T23:59:59.000Z

142

Uranium Atoms Don't Share the Vibe  

NLE Websites -- All DOE Office Websites (Extended Search)

Uranium Atoms Don't Share the Vibe Uranium Atoms Don't Share the Vibe Suppose you throw a rock into a pond, but instead of circular waves spreading across the surface, only a single bit of the surface at the rock's entry point oscillates up and down continuously. In the 31 March Physical Review Letters, researchers using the XOR 3-ID-C beamline at the APS report a surprising effect in a crystalline solid: a few-atom-wide vibration that refuses to spread through the material. The team probed heated uranium with x rays and neutrons to study the crystal's vibrations. Although predicted twenty years ago, the effect has never been conclusively seen in a three-dimensional crystal. The result seems to demonstrate the surprising ability of a uniform material to concentrate energy spontaneously. - JR Minkel

143

Questions and Answers - Does an atom smasher really smash atoms?  

NLE Websites -- All DOE Office Websites (Extended Search)

is an accelerator? is an accelerator? Previous Question (What is an accelerator?) Questions and Answers Main Index Next Question (Where and how do you get your electrons for your accelerator?) Where and how do you get yourelectrons for your accelerator? Does an atom smasher really smash atoms? Well, yes, they do, but we now prefer to call them by their less aggression-centered name, "particle harmony disrupters." Of course some atom smashers do much more smashing than others. We use electrons in our accelerator to study the nucleus of an atom. Remember that electrons are negative, as are the electrons surrounding the target. Since like charged particles repel each other, our particles have to have enough energy to blast through that electron cloud to get to the nucleus. The electrons then

144

The Diagnostic Process All plants grown indoors in containers  

E-Print Network (OSTI)

existing light. Bulbs of different light Caring for Plants in the Home Lynn Ellen Doxon, former Extension temperatures more closely resemble the tropics than local outdoor temperatures. Light Needs Even among plants that naturally grow in the shade, light needs vary. There are four basic light categories for indoor plants grown

Castillo, Steven P.

145

Microstructure of Ice Accretions Grown on Aluminum Conductors  

Science Conference Proceedings (OSTI)

In order to study the microstructure of glaze and rime deposits formed on the conductors of power lines, ice accretions are grown on a slowly rotating aluminum cylinder placed in the working section of a wind tunnel. The growth conditions cover ...

Jean-Louis Laforte; Luan C. Phan; Batrice Felin

1983-07-01T23:59:59.000Z

146

UNITED STATES ATOMIC ENERGY COMMISSION  

Office of Legacy Management (LM)

producing uranium for the Mo"hz,t,a, Projec, can best be qwtcd Irom the Smyth official report - Atomic Energy - . ' .: CCL, + NaCl - ."-l Figure 6. apparatus used in electrcdytic...

147

Single artificial-atom lasing  

E-Print Network (OSTI)

Solid-state superconducting circuits are versatile systems in which quantum states can be engineered and controlled. Recent progress in this area has opened up exciting possibilities for exploring fundamental physics as well as applications in quantum information technology; in a series of experiments it was shown that such circuits can be exploited to generate quantum optical phenomena, by designing superconducting elements as artificial atoms that are coupled coherently to the photon field of a resonator. Here we demonstrate a lasing effect with a single artificial atom - a Josephson-junction charge qubit - embedded in a superconducting resonator. We make use of one of the properties of solid-state artificial atoms, namely that they are strongly and controllably coupled to the resonator modes. The device is essentially different from existing lasers and masers; one and the same artificial atom excited by current injection produces many photons.

O. Astafiev; K. Inomata; A. O. Niskanen; T. Yamamoto; Yu. A. Pashkin; Y. Nakamura; J. S. Tsai

2007-10-04T23:59:59.000Z

148

u. S. Atomic Energy Commission  

Office of Legacy Management (LM)

October 31, 1949 Manager of Operations u. S. Atomic Energy Commission R. 0. Box 30, Ansonia Station New York ES, N. Y. MATERIALS 5+k& hJf Reference: SK:BL Attention: Mr. R. J....

149

State-wide performance criteria for international safeguards  

Science Conference Proceedings (OSTI)

Traditionally, the International Atomic Energy Agency (IAEA) has relied upon prescriptive criteria to guide safeguards implementation. The prospect of replacing prescriptive safeguards criteria with more flexible performance criteria would constitute a structural change in safeguards and raises several important questions. Performance criteria imply that while safeguards goals will be fixed, the means of attaining those goals will not be explicitly prescribed. What would the performance objectives be under such a system? How would they be formulated? How would performance be linked to higher level safeguards objectives? How would safeguards performance be measured State-wide? The implementation of safeguards under performance criteria would also signal a dramatic change in the manner the Agency does business. A higher degree of flexibility could, in principle, produce greater effectiveness and efficiency, but would come with a need for increased Agency responsibility in practice. To the extent that reliance on prescriptive criteria decreases, the burden of justifying actions and ensuring their transparency will rise. Would there need to be limits to safeguards implementation? What would be the basis for setting such limits? This paper addresses these and other issues and questions relating to both the formulation and the implementation of performance-based criteria.

Budlong-Sylvester, K. W. (Kory W.); Pilat, Joseph F.; Stanbro, W. D. (William D.)

2001-06-01T23:59:59.000Z

150

Exotic atoms and leptonic conservations  

DOE Green Energy (OSTI)

The major 1989 efforts have been on two aspects of experiments at TRIUMF. One effort was production of muonic hydrogen and muonic deuterium into a vacuum. We study rates relevant to muonic catalyzed fusion, and if there are found an adequate number of muons in the 2s state then we plan to measure precision energies. The second effort was to develop plans for kaonic atoms at the kaon factory. We also completed analyses from the experiments with pionic atoms at LAMPF.

Kunselman, R.

1990-01-01T23:59:59.000Z

151

Transition from LEDCOP to ATOMIC  

SciTech Connect

This paper discusses the development of the ATOMIC code, a new low to mid Z opacity code, which will replace the current Los Alamos low Z opacity code LEDCOP. The ATOMIC code is based on the FINE code, long used by the Los Alamos group for spectral comparisons in local thermodynamic equilibrium (LTE) and for non-LTE calculations, both utilizing the extensive databases from the atomic physics suite of codes based on the work of R.D. Cowan. Many of the plasma physics packages in LEDCOP, such as line broadening and free-free absorption, are being transferred to the new ATOMIC code. A new equation of state (EOS) model is being developed to allow higher density calculations than were possible with either the FINE or LEDCOP codes. Extensive modernization for both ATOMIC and the atomic physics code suites, including conversion to Fortran 90 and parallelization, are underway to speed up the calculations and to allow the use of expanded databases for both the LTE opacity tables and the non-LTE calculations. Future plans for the code will be outlined, including considerations for new generation opacity tables.

Magee, N. H. (Norman H.); Abdallah, J. (Joseph); Colgan, J. (James); Hakel, P. (Peter); Kilcrease, D. P. (David P.); Mazevet, S. (Stephane); Sherrill, M. E. (Manolo E.); Fontes, C. J. (Christopher J.); Zhang, H. (Honglin)

2004-01-01T23:59:59.000Z

152

Wide Area and Distributed Hydrogen Sensors  

DOE Green Energy (OSTI)

Recent advances in optical sensors show promise for the development of new wide area monitoring and distributed optical network hydrogen detection systems. Optical hydrogen sensing technologies reviewed here are: 1) open path Raman scattering systems, 2) back scattering from chemically treated solid polymer matrix optical fiber sensor cladding; and 3) shlieren and shearing interferometry imaging. Ultrasonic sensors for hydrogen release detection are also reviewed. The development status of these technologies and their demonstrated results in sensor path length, low hydrogen concentration detection ability, and response times are described and compared to the corresponding status of hydrogen spot sensor network technologies.

Zalosh, Robert G.; Barilo, Nick F.

2009-09-18T23:59:59.000Z

153

Atomic Physics Division 1999 - Future Directions  

Science Conference Proceedings (OSTI)

... lying Rydberg states constitute a "frozen" Rydberg gas. ... of atom interactions in cold atomic gases and Bose ... or optical fields and tight confinement of ...

154

Cavity Quantum Electrodynamics with Ultracold Atoms.  

E-Print Network (OSTI)

??Die vorliegende Arbeit befasst sich mit der Wechselwirkung ultrakalter Atome mit der Mode eines optischen Resonators hoher Gu?te. Die Atome sind dabei in einem periodischen (more)

Habibian, Hessam

2013-01-01T23:59:59.000Z

155

Nano transfer and nanoreplication using deterministically grown sacrificial nanotemplates  

DOE Patents (OSTI)

Methods, manufactures, machines and compositions are described for nanotransfer and nanoreplication using deterministically grown sacrificial nanotemplates. An apparatus, includes a substrate and a nanoconduit material coupled to a surface of the substrate. The substrate defines an aperture and the nanoconduit material defines a nanoconduit that is i) contiguous with the aperture and ii) aligned substantially non-parallel to a plane defined by the surface of the substrate.

Melechko, Anatoli V. (Oak Ridge, TN); McKnight, Timothy E. (Greenback, TN); Guillorn, Michael A. (Ithaca, NY); Ilic, Bojan (Ithaca, NY); Merkulov, Vladimir I. (Knoxville, TX); Doktycz, Mitchel J. (Knoxville, TN); Lowndes, Douglas H. (Knoxville, TN); Simpson, Michael L. (Knoxville, TN)

2012-03-27T23:59:59.000Z

156

Plant Wide Assessment for SIFCO Industries, Inc.  

Science Conference Proceedings (OSTI)

Sifco Industries carreid out a plant wide energy assessment under a collaborative program with the U.S. Department of Energy during October 2004 to September 2005. During the year, personnel from EIS, E3M, DPS, BuyCastings.Com, and Sifco plant facilities and maintenance personnel, as a team collected energy use, construction, process, equipment and operational information about the plant. Based on this information, the team identified 13 energy savings opportunities. Near term savings opportunities have a total potential savings of about $1,329,000 per year and a combined simple payback of about 11 months. Implementation of these recommendations would reduce CO2 emissions by about 16,000,000 pounds per year, which would reduce overall plant CO2 emissions by about 45%. These totals do not include another $830,000 per year in potential savings with an estimated 9-month payback, from converting the forging hammers from steam to compressed air.

Kelly Kissock, Arvind Thekdi et. al.

2005-07-06T23:59:59.000Z

157

Table 4-3 Site Wide Environmental Management Matrix  

NLE Websites -- All DOE Office Websites (Extended Search)

Site-Wide Environmental Assessment of Table 4-3. Site-Wide Environmental Management Matrix National Renewable Energy Laboratory's South Table Mountain Complex FINAL POTENTIAL...

158

Government-Wide Diversity and Inclusion Strategic Plan (2011...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Government-Wide Diversity and Inclusion Strategic Plan (2011), Office of Personnel Management Government-Wide Diversity and Inclusion Strategic Plan (2011), Office of Personnel...

159

Implications of Wide-Area Geographic Diversity for Short- Term...  

NLE Websites -- All DOE Office Websites (Extended Search)

Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar Power Title Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar...

160

Observation of relativistic antihydrogen atoms  

DOE Green Energy (OSTI)

An observation of relativistic antihydrogen atoms is reported in this dissertation. Experiment 862 at Fermi National Accelerator Laboratory observed antihydrogen atoms produced by the interaction of a circulating beam of high momentum (3 < p < 9 GeV/c) antiprotons and a jet of molecular hydrogen gas. Since the neutral antihydrogen does not bend in the antiproton source magnets, the detectors could be located far from the interaction point on a beamline tangent to the storage ring. The detection of the antihydrogen is accomplished by ionizing the atoms far from the interaction point. The positron is deflected by a magnetic spectrometer and detected, as are the back to back photons resulting from its annihilation. The antiproton travels a distance long enough for its momentum and time of flight to be measured accurately. A statistically significant sample of 101 antihydrogen atoms has been observed. A measurement of the cross section for {bar H}{sup 0} production is outlined within. The cross section corresponds to the process where a high momentum antiproton causes e{sup +} e{sup -} pair creation near a nucleus with the e{sup +} being captured by the antiproton. Antihydrogen is the first atom made exclusively of antimatter to be detected. The observation experiment's results are the first step towards an antihydrogen spectroscopy experiment which would measure the n = 2 Lamb shift and fine structure.

Blanford, Glenn DelFosse

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

SCHROEDINGER'S CAT IN AN ATOMIC CAGE  

Science Conference Proceedings (OSTI)

... gov SCHROEDINGER'S CAT IN AN ATOMIC CAGE. They ... conditions. Schroedinger cat states are extremely fragile. Any ...

162

NIST: Atomic Spectros. - Spectral Continuum Radiation  

Science Conference Proceedings (OSTI)

Atomic Spectroscopy: home page. 21. Spectral Continuum Radiation. Hydrogenic Species. Precise quantum-mechanical ...

163

Cancer in atomic bomb survivors  

SciTech Connect

Radiation carcinogenesis was first noted in studies of individuals with occupational or therapeutic exposure to radiation. Data from long-term follow-up studies of atomic bomb survivors in Hiroshima and Nagasaki have greatly enhanced our knowledge of radiation carcinogenesis. This book presents current results obtained from epidemiological studies and pathological studies on cancer among atomic bomb survivors. It includes a description of the dosimetry system which is currently being revised. Although many of the details about radiation carcinogenesis remain unknown or uncertain, it is clear that the incidence of radiation-induced cancer among atomic bomb survivors continues unabated 40 years after exposure. Recent increases in occupational and environmental exposure to radiation together with the need for a thorough review of radiation protection standards have led to increased recognition of the importance of research on radiation carcinogenesis and risk assessment.

Shigematsu, I.; Kagan, A.

1986-01-01T23:59:59.000Z

164

Hot atom chemistry and radiopharmaceuticals  

Science Conference Proceedings (OSTI)

The chemical products made in a cyclotron target are a combined result of the chemical effects of the nuclear transformation that made the radioactive atom and the bulk radiolysis in the target. This review uses some well-known examples to understand how hot atom chemistry explains the primary products from a nuclear reaction and then how radiation chemistry is exploited to set up the optimal product for radiosynthesis. It also addresses the chemical effects of nuclear decay. There are important principles that are common to hot atom chemistry and radiopharmaceutical chemistry. Both emphasize short-lived radionuclides and manipulation of high specific activity nuclides. Furthermore, they both rely on radiochromatographic separation for identification of no-carrieradded products.

Krohn, Kenneth A.; Moerlein, Stephen M.; Link, Jeanne M.; Welch, Michael J. [University of Washington, Department of Radiology, Molecular Imaging Center, 1959 NE Pacific St., Box 356004, Seattle, WA 98195-6004 (United States); Washington University, Department of Radiology, Division of Radiological Sciences, 510 South Kingshighway, St. Louis, MO 63110 (United States); University of Washington, Department of Radiology, Molecular Imaging Center, 1959 NE Pacific St., Box 356004, Seattle, WA 98195-6004 (United States); Washington University, Department of Radiology, Division of Radiological Sciences, 510 South Kingshighway, St. Louis, MO 63110 (United States)

2012-12-19T23:59:59.000Z

165

Degeneracy Breaking of Hydrogen Atom  

E-Print Network (OSTI)

The three dimensional rotation group, SO(3), is a symmetry group of the normal hydrogen atom. Each reducible representation of this group can be associated with a degenerate energy level. If this atom is placed in an external magnetic field, the interaction between the orbital magnetic moment with this field will lead to a symmetry breaking where the symmetry group of the atom is a new group distinct from the SO(3) group. This phenomenon describes the normal Zeeman effect, where a degenerate energy level splits into several new energy levels. It is explicitly shown that each of the new energy levels can be associated with an irreducible representation of the new symmetry group.

Agung Trisetyarso; Pantur Silaban

2008-12-22T23:59:59.000Z

166

Photoluminescence Characterization of ZnO Thin Films Grown by RF- Sputtering  

Science Conference Proceedings (OSTI)

This article presents photoluminescence (PL) characterization of ZnO thin films deposited by radio-frequency magnetron sputtering method on sapphire and n-type Si (100) substrates. PL measurements were carried out at room temperature to investigate the energy band gaps and optical quality of the ZnO thin films. In order to draw a specific picture of surface morphology of ZnO thin films, atomic force microscope images were taken. All the results were compared to the results obtained from the bulk ZnO sample. The results revealed that the energy band gap of ZnO thin films grown on n-type Si (100) is higher than ZnO on sapphire. However, energy band gap of bulk ZnO is higher compared to both ZnO on n-type Si (100) and sapphire (Al{sub 2}O{sub 3}). This is probably due to the crystalline quality because good crystallinity increases the radiation recombination and hence increase the intensity of the NBE emission.

Bakhori, S. K. Mohd; Ng, S. S.; Ahmad, M. A.; Ahmad, H.; Hassan, Z.; Hassan, H. Abu; Abdullah, M. J. [Nano-optoelectronics Research and Technology Laboratory, School of Physics, Universiti Sains Malaysia, 11800, USM, Penang (Malaysia)

2011-03-30T23:59:59.000Z

167

Temperature dependence of mechanical stiffness and dissipation in ultrananocrystalline diamond films grown by the HFCVD techinque.  

SciTech Connect

We have characterized mechanical properties of ultrananocrystalline diamond (UNCD) thin films grown using the hot filament chemical vapor deposition (HFCVD) technique at 680 C, significantly lower than the conventional growth temperature of -800 C. The films have -4.3% sp{sup 2} content in the near-surface region as revealed by near edge x-ray absorption fine structure spectroscopy. The films, -1 {micro}m thick, exhibit a net residual compressive stress of 370 {+-} 1 MPa averaged over the entire 150 mm wafer. UNCD microcantilever resonator structures and overhanging ledges were fabricated using lithography, dry etching, and wet release techniques. Overhanging ledges of the films released from the substrate exhibited periodic undulations due to stress relaxation. This was used to determine a biaxial modulus of 838 {+-} 2 GPa. Resonant excitation and ring-down measurements in the kHz frequency range of the microcantilevers were conducted under ultrahigh vacuum (UHV) conditions in a customized UHV atomic force microscope system to determine Young's modulus as well as mechanical dissipation of cantilever structures at room temperature. Young's modulus is found to be 790 {+-} 30 GPa. Based on these measurements, Poisson's ratio is estimated to be 0.057 {+-} 0.038. The quality factors (Q) of these resonators ranged from 5000 to 16000. These Q values are lower than theoretically expected from the intrinsic properties of diamond. The results indicate that surface and bulk defects are the main contributors to the observed dissipation in UNCD resonators.

Adiga, V. P.; Sumant, A. V.; Suresh, S.; Gudeman, C.; Auciello, O.; Carlisle, J. A.; Carpick, R. W.; Materials Science Division; Univ. of Pennsylvania; Innovative Micro Tech.; Advanced Diamond Tech.

2009-06-01T23:59:59.000Z

168

Supercomputers and atomic physics data  

SciTech Connect

The advent of the supercomputer has dramatically increased the possibilities for generating and using massive amounts of detailed fine structure atomic physics data. Size, speed, and software have made calculations which were impossible just a few years ago into a reality. Further technological advances make future possibilities seem endless. The cornerstone atomic structure codes of R.D. Cowan have been adapted into a single code CATS for use on Los Alamos supercomputers. We provide a brief overview of the problem; and report a sample CATS calculation using configuration interaction to calculate collision and oscillator strengths for over 300,000 transitions in neutral nitrogen. We also discuss future supercomputer needs. 2 refs.

Abdallah, J. Jr.; Clark, R.E.H.

1988-01-01T23:59:59.000Z

169

Supersonic coal water slurry fuel atomizer  

DOE Patents (OSTI)

A supersonic coal water slurry atomizer utilizing supersonic gas velocities to atomize coal water slurry is provided wherein atomization occurs externally of the atomizer. The atomizer has a central tube defining a coal water slurry passageway surrounded by an annular sleeve defining an annular passageway for gas. A converging/diverging section is provided for accelerating gas in the annular passageway to supersonic velocities. 3 figs.

Becker, F.E.; Smolensky, L.S.; Balsavich, J.

1989-11-01T23:59:59.000Z

170

A Stable Open Framework with Wide Open Spaces | Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

Pumping Through the Middle Crust Pumping Through the Middle Crust Looking for Ways to Improve Vaccines Against the Deadly Rotavirus A "Colossal" Magnetic Effect under Pressure Using High Pressure to Reveal Quantum Criticality in an Elemental Antiferromagnet Nano Changes Have Macro Importance for a Key Electronics Material Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed A Stable Open Framework with Wide Open Spaces AUGUST 11, 2009 Bookmark and Share In this depiction of the structure of PCN-61, a metal-organic framework, copper atoms (blue) sit in "paddlewheel" structures with oxygen (red) and carbon (black) atoms. The paddlewheels link together to form

171

Lesson 6- Atoms to Electricity  

Energy.gov (U.S. Department of Energy (DOE))

Most power plants make electricity by boiling water to make steam that turns a turbine. A nuclear power plant works this way, too. At a nuclear power plant, splitting atoms produce the heat to boil the water. This lesson covers inside the reactor, fission control and electricity generation.

172

Dynamical polarization in pionic atoms  

SciTech Connect

Dynamical nuclear polarization occurs in pionic atoms when a nuclear excitation of appropriate multipolarity is nearly degenerate with de-excitation of a pion atomic level. This phenomenon has been studied in several nuclei, one goal being to test the pion optical potential for pion atomic states normally ''hidden'' because of pion absorption. We find that, in addition to Coulomb mixing of the atomic and nuclear levels, strong interaction mixing and nuclear excitations above the lowest collective quadrupole mode are important for understanding the experimental results. All cases except /sup 110/Pd can then be understood. For /sup 110/Pd, additional nuclear structure information is needed to determine whether or not the conventional pion optical potential will suffice again. We discuss the sensitivity of dynamical polarization measurements to the parameters of the optical potential and to various aspects of nuclear structure. In particular, we find that pionic /sup 150/Sm provides a test of the interacting boson model and that the difference in neutron and proton radii predicted by Hartree-Fock calculations affects the mixing appreciably.

Dubach, J.F.; Moniz, E.J.; Nixon, G.D.

1979-08-01T23:59:59.000Z

173

Instrumentation and Control Strategies for Plant-Wide and Fleet-Wide Cost Reduction: Utility Application Guideline  

Science Conference Proceedings (OSTI)

This CD provides guidance from the EPRI initiative on IC Strategies for Plant-Wide and Fleet-Wide Cost Reduction. Included on the CD are EPRI Technical Report 1015087, Instrumentation and Control Strategies for Plant-Wide and Fleet-Wide Cost Reduction: Utility Application Guideline, published October 2007, and two multimedia briefings. The report and briefings describe a wide range of options while emphasizing integrated modernization across the plant or fleet. Coordinated improvements to shared communi...

2008-09-03T23:59:59.000Z

174

Magneto-Optical Cooling of Atoms  

E-Print Network (OSTI)

We propose an alternative method to laser cooling. Our approach utilizes the extreme brightness of a supersonic atomic beam, and the adiabatic atomic coilgun to slow atoms in the beam or to bring them to rest. We show how internal-state optical pumping and stimulated optical transitions, combined with magnetic forces can be used to cool the translational motion of atoms. This approach does not rely on momentum transfer from photons to atoms, as in laser cooling. We predict that our method can surpass laser cooling in terms of flux of ultra-cold atoms and phase-space density, with lower required laser power and reduced complexity.

Raizen, Mark G; Rochester, Simon; Narevicius, Julia; Narevicius, Edvardas

2013-01-01T23:59:59.000Z

175

Atomic physics and non-equilibrium plasmas  

DOE Green Energy (OSTI)

Three lectures comprise the report. The lecture, Atomic Structure, is primarily theoretical and covers four topics: (1) Non-relativistic one-electron atom, (2) Relativistic one-electron atom, (3) Non-relativistic many-electron atom, and (4) Relativistic many-electron atom. The lecture, Radiative and Collisional Transitions, considers the problem of transitions between atomic states caused by interactions with radiation or other particles. The lecture, Ionization Balance: Spectral Line Shapes, discusses collisional and radiative transitions when ionization and recombination processes are included. 24 figs., 11 tabs.

Weisheit, J.C.

1986-04-25T23:59:59.000Z

176

Preferential orientation of Te precipitates in melt-grown CZT  

Science Conference Proceedings (OSTI)

Cadmium zinc telluride (Cd1-xZnxTe or CZT) has proved to be a useful material for semiconductor gamma-ray spectrometers and other electro-optic devices. It is often grown Te-rich to optimize its electrical characteristics, but this off-stoichiometric growth leads to the formation of semimetallic Te precipitates in the semiconducting host crystal. These precipitates can impair device performance and their formation needs to be inhibited, if possible, during growth. Characterization of melt-grown CZT has shown that Te precipitates are often faceted. In this study, characterization of several particles of different shapes revealed that most of the Te precipitates were preferentially oriented with the {101}CZT||{-12-10}Te . A secondary orientation relationship was also observed as {11-1}CZT||{01-11}Te for one of the {111}CZT family of planes. One of the particles exhibited {110}CZT||{01-10}Te and {001}CZT||{0001}Te . Precipitates were often found on {111}CZT twin boundaries and, in these cases, it was possible to assign specific orientations with respect to the twin plane. The expected orientation of the {0001}-plane of Te aligned with the {111}-plane of CZT was not observed even though a good lattice match is predicted in ab initio models. Observations of strained and polycrystalline Te precipitates are also discussed with relevance to the ab initio model and to impacts on electronic properties.

Henager, Charles H.; Edwards, Danny J.; Schemer-Kohrn, Alan L.; Bliss, Mary; Jaffe, John E.

2009-05-18T23:59:59.000Z

177

UNITED STATES ATOMIC ENERGY COMMISSION  

Office of Legacy Management (LM)

I(S.0 -01: I(S.0 -01: SPECIAL NUCLEAR MATERIAL LlCEWSE Pursuant to the Atomic Energy Act of 1954 and Title 10, Code of Federal Regulations, Chapter 1, Part 70, "Special Nuclear Material Regulations," o. license is hereby issued authorizing the licensee to receive and possess the special nuclear material designated below; to use such special nuclear material for the purpose(s) and at the place(s) designated below; and to transfer such material to persons' authorized to receive it in accordance with the regulations in said Port. This license shall be deemed to contain the conditions specified in Section 70.32(a) of said regulations, and is subject to all applicable rules, regtdations, and orders of the Atomic Energy Commission now or hereafter in

178

Atomic vapor laser isotope separation  

SciTech Connect

Atomic vapor laser isotope separation (AVLIS) is a general and powerful technique. A major present application to the enrichment of uranium for light-water power reactor fuel has been under development for over 10 years. In June 1985 the Department of Energy announced the selection of AVLIS as the technology to meet the nation's future need for the internationally competitive production of uranium separative work. The economic basis for this decision is considered, with an indicated of the constraints placed on the process figures of merit and the process laser system. We then trace an atom through a generic AVLIS separator and give examples of the physical steps encountered, the models used to describe the process physics, the fundamental parameters involved, and the role of diagnostic laser measurements.

Stern, R.C.; Paisner, J.A.

1985-11-08T23:59:59.000Z

179

The Future of Atomic Energy  

DOE R&D Accomplishments (OSTI)

There is definitely a technical possibility that atomic power may gradually develop into one of the principal sources of useful power. If this expectation will prove correct, great advantages can be expected to come from the fact that the weight of the fuel is almost negligible. This feature may be particularly valuable for making power available to regions of difficult access and far from deposits of coal. It also may prove a great asset in mobile power units for example in a power plant for ship propulsion. On the negative side there are some technical limitations to be applicability of atomic power of which perhaps the most serious is the impossibility of constructing light power units; also there will be some peculiar difficulties in operating atomic plants, as for example the necessity of handling highly radioactive substances which will necessitate, at least for some considerable period, the use of specially skilled personnel for the operation. But the chief obstacle in the way of developing atomic power will be the difficulty of organizing a large scale industrial development in an internationally safe way. This presents actually problems much more difficult to solve than any of the technical developments that are necessary, It will require an unusual amount of statesmanship to balance properly the necessity of allaying the international suspicion that arises from withholding technical secrets against the obvious danger of dumping the details of the procedures for an extremely dangerous new method of warfare on a world that may not yet be prepared to renounce war. Furthermore, the proper balance should be found in the relatively short time that will elapse before the 'secrets' will naturally become open knowledge by rediscovery on part of the scientists and engineers of other countries.

Fermi, E.

1946-05-27T23:59:59.000Z

180

STAR FORMATION IN ATOMIC GAS  

SciTech Connect

Observations of nearby galaxies have firmly established, over a broad range of galactic environments and metallicities, that star formation occurs exclusively in the molecular phase of the interstellar medium (ISM). Theoretical models show that this association results from the correlation between chemical phase, shielding, and temperature. Interstellar gas converts from atomic to molecular only in regions that are well shielded from interstellar ultraviolet (UV) photons, and since UV photons are also the dominant source of interstellar heating, only in these shielded regions does the gas become cold enough to be subject to Jeans instability. However, while the equilibrium temperature and chemical state of interstellar gas are well correlated, the timescale required to reach chemical equilibrium is much longer than that required to reach thermal equilibrium, and both timescales are metallicity-dependent. Here I show that the difference in timescales implies that, at metallicities below a few percent of the solar value, well shielded gas will reach low temperatures and proceed to star formation before the bulk of it is able to convert from atomic to molecular. As a result, at extremely low metallicities, star formation will occur in a cold atomic phase of the ISM rather than a molecular phase. I calculate the observable consequences of this result for star formation in low-metallicity galaxies, and I discuss how some current numerical models for H{sub 2}-regulated star formation may need to be modified.

Krumholz, Mark R., E-mail: krumholz@ucolick.org [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Role of atomic collisions in fusion  

SciTech Connect

Atomic physics issues have played a large role in controlled fusion research. A general discussion of the present role of atomic processes in both magnetic and inertial controlled fusion work is presented.

Post, D.E.

1982-04-01T23:59:59.000Z

182

Laser cooling and trapping of neutral atoms*  

Science Conference Proceedings (OSTI)

... 1 m/s, any gas in equilibrium (other than spin-polarized atomic hydro- ... lattice-trapped atoms, a physical picture with the simplicity and power of the ...

2010-08-23T23:59:59.000Z

183

Atomic vapor laser isotope separation process  

DOE Patents (OSTI)

A laser spectroscopy system is utilized in an atomic vapor laser isotope separation process. The system determines spectral components of an atomic vapor utilizing a laser heterodyne technique. 23 figs.

Wyeth, R.W.; Paisner, J.A.; Story, T.

1990-08-21T23:59:59.000Z

184

NIST Atomic Form Factors: Summary of uncertainties  

Science Conference Proceedings (OSTI)

... element. This "H92 - 3/5CL" value is 1.09 e/atom for uranium or 0.002 e/atom for Z = 6 (ie, 40 % of the dipole correction). ...

185

Observation of a Two-Dimensional Fermi Gas of Atoms  

Science Conference Proceedings (OSTI)

We have prepared a degenerate gas of fermionic atoms which move in two dimensions while the motion in the third dimension is 'frozen' by tight confinement and low temperature. In situ imaging provides direct measurement of the density profile and temperature. The gas is confined in a defect-free optical potential, and the interactions are widely tunable by means of a Fano-Feshbach resonance. This system can be a starting point for exploration of 2D Fermi physics and critical phenomena in a pure, controllable environment.

Martiyanov, Kirill; Makhalov, Vasiliy; Turlapov, Andrey [Institute of Applied Physics, Russian Academy of Sciences, ul. Ulyanova 46, Nizhniy Novgorod, 603000 (Russian Federation)

2010-07-16T23:59:59.000Z

186

WorldWideScience.org: China's Participation Expands Access to...  

Office of Scientific and Technical Information (OSTI)

International Council for Scientific and Technical Information (ICSTI), which serves as a primary sponsor of the WorldWideScience Alliance. WorldWideScience.org was conceived and...

187

Towards a high-precision atomic gyroscope  

E-Print Network (OSTI)

In this thesis, I report on the design and construction of the Rubidium Atomic Gyroscope Experiment (RAGE) at Draper Lab.

Van Camp, Mackenzie A. (Mackenzie Anne)

2013-01-01T23:59:59.000Z

188

Argonne Chemical Sciences & Engineering - Institute for Atom...  

NLE Websites -- All DOE Office Websites (Extended Search)

Catalysis & Energy Conversion Electrochemical Energy Storage Nuclear & Environmental Processes National Security Institute for Atom-Efficient Chemical Transformations Center for...

189

NIST: Atomic Spectroscopy Group - Past News  

Science Conference Proceedings (OSTI)

... of Atomic, Molecular, and Optical Physics of the American Physical Society (DAMOP) in ... and Determination of Relative Nuclear Charge Radius.". ...

2013-06-06T23:59:59.000Z

190

Atomic Scale Deformation Mechanisms of Amorphous Polyethylene ...  

Science Conference Proceedings (OSTI)

Atomic Scale Deformation Mechanisms of Amorphous Polyethylene under Tensile Loading Atomistic Predictions of Age Hardening in Al-Cu Alloys.

191

NIST: Atomic Spectroscopy Group - John Curry  

Science Conference Proceedings (OSTI)

... chemical equilibrium and deviations from thermodynamic equilibrium. I am also interested in the acquisition and compilation of basic atomic data. ...

2011-02-09T23:59:59.000Z

192

Wide electrochemical window solvents for use in electrochemical ...  

Wide electrochemical window solvents for use in electrochemical devices and electrolyte solutions incorporating such solvents United States Patent

193

Collisionally Induced Atomic Clock Shifts and Correlations  

E-Print Network (OSTI)

We develop a formalism to incorporate exchange symmetry considerations into the calculation of collisional frequency shifts and blackbody radiation effects for atomic clock transitions using a density matrix formalism. The formalism is developed for both fermionic and bosonic atomic clocks. Results for a finite temperature ${}^{87}$Sr ${}^1S_0$ ($F = 9/2$) atomic clock in a magic wavelength optical lattice are presented.

Y. B. Band; I. Osherov

2010-11-15T23:59:59.000Z

194

FINITE DIFFERENCE METHODS FOR THE WIDE-ANGLE `PARABOLIC' EQUATION  

E-Print Network (OSTI)

FINITE DIFFERENCE METHODS FOR THE WIDE-ANGLE `PARABOLIC' EQUATION GEORGIOS AKRIVIS Abstract. We consider a model initial and boundary value problem for the wide-angle `parabolic' equation Lur = icu, the wide-angle `parabolic'equation of underwater acoustics. Given R > 0, µ 0, > 0, , and q real

Akrivis, Georgios

195

Bonded Radii and the Contraction of the Electron Density of the Oxygen Atom by Bonded Interactions  

SciTech Connect

The bonded radii for more than 550 bonded pairs of atoms, comprising more than 50 crystals, determined from experimental and theoretical electron density distributions, are compared with the effective ionic, ri(M), and crystal radii, rc(M), for metal atoms, M, bonded to O atoms. At odds with the fixed ionic radius of 1.40 , assumed for the O atom in the compilation of the ionic radii, the bonded radius for the atom, rb(O), is not fixed but displays a relatively wide range of values as the O atom is progressively polarized by the M-O bonded interactions: as such, rb(O) decreases systematically from 1.40 (the Pauling radius of the oxide anion) as bond lengths decrease when bonded to an electropositive atom like sodium, to 0.64 (Braggs atomic radius of the O atom) when bonded to an electronegative atom like nitrogen. Both rb(M) and rb(O) increase in tandum with the increasing coordination number of the M atom. The bonded radii of the M atoms are highly correlated with both ri(M) and rc(M), but they both depart systematically from rb(M) and become smaller as the electronegativity of the M atom increases and the M-O bond length decreases. The well-developed correlations between both sets of radii and rb(M) testifies to the relative precision of both sets of radii and the fact that both sets are highly correlated the M-O bond 1 lengths. On the other hand, the progressive departure of rb(O) from the fixed ionic radius of the O atom with the increasing electronegativity of the bonded M atom indicates that any compilation of sets of ionic radii, assuming that the radius for the oxygen atom is fixed in value, is problematical and impacts on the accuracy of the resulting sets of ionic and crystal radii thus compiled. The assumption of a fixed O atom radius not only results in a negative ionic radii for several atoms, but it also results in values of rb(M) that are much as ~ 0.6 larger than the ri(M) and rc(M) values, respectively, particularly for the more electronegative M atoms. On the other hand, the ionic radii are in closer agreement with rb(M) for the more electropositive atoms. Notwithstanding that ionic radii are typically smaller than bonded radii, particularly for the more electronegative atoms, they have been used with considerable success in understanding and rationalizing problems and properties in crystal chemistry primarily because both ionic and crystal radii are highly correlated on a one-to-one basis with both the bonded radii and the associated M-O bond lengths. The lack of agreement between the effective ionic and crystal radii and the bonded radii for the more shared bonded interactions is ascribed to the progressive increase in the polarization of the O atom by the bonded atoms with a concomitant decrease in its radius, a factor that was neglected in the compilation of ionic and crystal radii for fluorides, oxides, sulfides and nitrides. This accounts for ionic radii for these materials being smaller than the bonded radii for the more electronegative atoms.

Gibbs, Gerald V.; Ross, Nancy L.; Cox, David F.; Rosso, Kevin M.; Iversen, Bo B.; Spackman, M. A.

2013-02-21T23:59:59.000Z

196

Simple correlations between electric quadrupole moments of atomic nuclei  

SciTech Connect

Measurements of non-yrast electric quadrupole moments (i.e., diagonal E2 matrix elements) of atomic nuclei are becoming widely available from multiple-step Coulomb excitation. It is shown that, where quadrupole-moment data exist, $\\langle 2_1^+ ||E2|| 2_1^+ \\rangle+\\langle 2_2^+ ||E2|| 2_2^+ \\rangle\\approx 0$ is observed across a wide range of masses and deformations. In addition, $\\langle 4_1^+ ||E2|| 4_1^+ \\rangle+\\langle 4_2^+ ||E2|| 4_2^+ \\rangle+\\langle 4_3^+ ||E2|| 4_3^+ \\rangle\\approx 0$ is observed within two standard deviations for three of the four existing measurements. Rotor models appear to be sufficient in describing these trends.

Allmond, James M [ORNL] [ORNL

2013-01-01T23:59:59.000Z

197

Carbon nanotubes grown on bulk materials and methods for fabrication  

DOE Patents (OSTI)

Disclosed are structures formed as bulk support media having carbon nanotubes formed therewith. The bulk support media may comprise fibers or particles and the fibers or particles may be formed from such materials as quartz, carbon, or activated carbon. Metal catalyst species are formed adjacent the surfaces of the bulk support material, and carbon nanotubes are grown adjacent the surfaces of the metal catalyst species. Methods employ metal salt solutions that may comprise iron salts such as iron chloride, aluminum salts such as aluminum chloride, or nickel salts such as nickel chloride. Carbon nanotubes may be separated from the carbon-based bulk support media and the metal catalyst species by using concentrated acids to oxidize the carbon-based bulk support media and the metal catalyst species.

Menchhofer, Paul A. (Clinton, TN); Montgomery, Frederick C. (Oak Ridge, TN); Baker, Frederick S. (Oak Ridge, TN)

2011-11-08T23:59:59.000Z

198

General Atomics (GA) Fusion News: A New Spin on Understanding...  

NLE Websites -- All DOE Office Websites (Extended Search)

General Atomics (GA) Fusion News: A New Spin on Understanding Plasma Confinement American Fusion News Category: General Atomics (GA) Link: General Atomics (GA) Fusion News: A New...

199

Pages that link to "Atomic City, Idaho" | Open Energy Information  

Open Energy Info (EERE)

Share this page on Facebook icon Twitter icon Pages that link to "Atomic City, Idaho" Atomic City, Idaho Jump to: navigation, search What links here Page: Atomic City,...

200

Chapter 2 Suggested Problems: Final Answer Key Atomic mass: mass of an individual atom  

E-Print Network (OSTI)

Chapter 2 Suggested Problems: Final Answer Key 2.1 Atomic mass: mass of an individual atom Atomic;Chapter 3 Suggested Problems: Final Answer Key 3.1 Atomic Structure: relates the # of protons and neutrons of intercepts 2 2 1 Reduction not necessary Enclosure (221) #12;Chapter 12 Suggested Problems: Final Answer Key

Grunlan, Melissa A.

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

CERTIFICATION DOCKET WESTINGHOUSE ATOMIC POWER DEVELOPMENT PLANT  

Office of Legacy Management (LM)

WESTINGHOUSE ATOMIC POWER DEVELOPMENT PLANT WESTINGHOUSE ATOMIC POWER DEVELOPMENT PLANT EAST PITTSBURGH PLANT FOREST HILLS PITTSBURGH, PENNSYLVANIA Department of Energy Office of Nuclear Energy Office of Terminal Waste Disposal and Remedial Action Division of Remedial Action Projects ..-.. --__- _".-.-l--_--l -_._ _- --- ~~~. . ..~ CONTENTS Page - - I NTRODUCTI ON 1 Purpose 1 Docket Contents 1 Exhibit I: Summary of Activities at Westinghouse Atomic Power Development Plant, East Pittsburgh Plant, Forest Hills, Pittsburgh, Pennsylvania I-l Exhibit II: Documents Supporting the Certification of Westinghouse Atomic Power Development Plant, East Pittsburgh Plant, Forest Hills, Pittsburgh, Pennsylvania iii II-1 . . .- .__.^ I ^_... _.-__^-____-. - CERTIFICATION DOCKET WESTINGHOUSE ATOMIC POWER DEVELOPMENT PLANT

202

Princeton Plasma Physics Lab - General Atomics (GA)  

NLE Websites -- All DOE Office Websites (Extended Search)

general-atomics-ga General general-atomics-ga General Atomics en The Scorpion's Strategy: "Catch and Subdue" http://www.pppl.gov/node/1132

American Fusion News Category: 
atomics-ga">General Atomics (GA)
203

The Atomic Energy Commission By Alice Buck  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Atomic Energy Atomic Energy Commission By Alice Buck July 1983 U.S. Department of Energy Office of Management Office of the Executive Secretariat Office of History and Heritage Resources 1 Introduction Almost a year after World War II ended, Congress established the United States Atomic Energy Commission to foster and control the peacetime development of atomic science and technology. Reflecting America's postwar optimism, Congress declared that atomic energy should be employed not only in the Nation's defense, but also to promote world peace, improve the public welfare, and strengthen free competition in private

204

Precision spectroscopy of the helium atom.  

SciTech Connect

Persistent efforts in both theory and experiment have yielded increasingly precise understanding of the helium atom. Because of its simplicity, the helium atom has long been a testing ground for relativistic and quantum electrodynamic effects in few-body atomic systems theoretically and experimentally. Comparison between theory and experiment of the helium spectroscopy in 1s2p{sup 3}P{sub J} can potentially extract a very precise value of the fine structure constant a. The helium atom can also be used to explore exotic nuclear structures. In this paper, we provide a brief review of the recent advances in precision calculations and measurements of the helium atom.

Hu, S.-M.; Lu, Z.-T.; Yan, Z.-C.; Physics; Univ. of Science and Technology of China; Univ. of Chicago; Univ. of New Brunswick

2009-06-01T23:59:59.000Z

205

Test of the quantumness of atom-atom correlations in a bosonic gas  

E-Print Network (OSTI)

It is shown how the quantumness of atom-atom correlations in a trapped bosonic gas can be made observable. Application of continuous feedback control of the center of mass of the atomic cloud is shown to generate oscillations of the spatial extension of the cloud, whose amplitude can be directly used as a characterization of atom-atom correlations. Feedback parameters can be chosen such that the violation of a Schwarz inequality for atom-atom correlations can be tested at noise levels much higher than the standard quantum limit.

D. Ivanov; S. Wallentowitz

2006-03-16T23:59:59.000Z

206

Benefits of Site-wide NEPA Review | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Benefits of Site-wide NEPA Review Benefits of Site-wide NEPA Review Benefits of Site-wide NEPA Review The purpose of this guidance memorandum is to describe potential benefits of conducting a site-wide NEPA review (environmental impact statement or environmental assessment). I believe that this information will help program and field offices prepare their annual NEPA planning summaries and their overall NEPA compliance strategies. Site-wide reviews can aid the Department of Energy (DOE) in meeting its goals to streamline the NEPA process, to make that process more useful to decision makers and the public, and to reduce the time and cost required to prepare NEPA documents Benefits of Site-wide NEPA Review More Documents & Publications Benefits of Site-wide NEPA National Environmental Policy Act Review (1994)

207

Interconnection-Wide Transmission Planning Initiative: Topic A,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning A description of the requirements for Topic A for all Interconnections under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning More Documents & Publications Microsoft Word - yDE-FOA-0000068.rtf Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation

208

Monitoring atom-atom entanglement and decoherence in a solvable tripartite open system in cavity QED  

E-Print Network (OSTI)

We solve exactly the dynamics of two strongly-driven two-level atoms resonantly coupled to a dissipative cavity field mode. Starting with the cavity field vacuum state, we show that the entanglement of the atom-atom subsystem cannot be created or increased. On the other hand, when the atoms are initially entangled the atomic Hilbert space divides into two subspaces. One of them is decoherence free so that the initial atomic entanglement remains available for applications, even in presence of a low enough atomic decay rate. In the other subspace a measure of entanglement, decoherence, and also purity, are described by a similar functional behavior that can be monitored by joint atomic measurements. Furthermore, we show the possible generation of Schr\\"odinger-cat-like states for the whole system in the transient regime, as well as of entanglement for the cavity field and the atom-atom subsystems conditioned by measurements on the complementary subsystem.

Bina, Matteo; Lulli, Alfredo; Solano, Enrique

2007-01-01T23:59:59.000Z

209

Manhattan Project: Atomic Discoveries, 1890s-1939  

Office of Scientific and Technical Information (OSTI)

Excerpt from the comic book "Adventures Inside the Atom." Click on this image or visit the "Library" to view the whole comic book. ATOMIC DISCOVERIES Excerpt from the comic book "Adventures Inside the Atom." Click on this image or visit the "Library" to view the whole comic book. ATOMIC DISCOVERIES (1890s-1939) Events A Miniature Solar System, 1890s-1919 Exploring the Atom, 1919-1932 Atomic Bombardment, 1932-1938 The Discovery of Fission, 1938-1939 Fission Comes to America, 1939 Philosophers of Ancient Greece reasoned that all matter in the universe must be composed of fundamental, unchangeable, and indivisible objects, which they called "atoma" ("ατoµα"). The exact nature of these atoms remained elusive, however, despite centuries of attempts by alchemists to create a "philosopher's stone" that could transmute atoms of lead to gold, prove the Greeks wrong, and make its inventors Modern model of an atom very rich. It was only in the late 1890s and the early twentieth-century that this view of a solid atom, bouncing around the universe like a billiard ball, was replaced by an atom that resembled more a miniature solar system, its electrons orbiting around a small nucleus. Explorations into the nature of the atom from 1919 to 1932 confirmed this new model, especially with Ernest Rutherford's 1919 success in finally transmuting an atom of one substance into another and with James Chadwick's 1932 discovery of the elusive final basic particle of the atom, the neutron. From 1932 to 1938, scientists around the world learned a great deal more about atoms, primarily by bombarding the nuclei of atoms and using a variety of particle accelerators. In 1938, word came from Berlin of the most startling result of them all: the nucleus of an atom could actually be split in two, or "fissioned." This breakthrough was quickly confirmed in the United States and elsewhere. According to the theories of Albert Einstein, the fission of an atom should result in a release of energy. An "atomic bomb" was now no longer just science fiction -- it was a distinct possibility.

210

Effect of in-situ oxygen on the electronic properties of graphene grown by carbon molecular beam epitaxy grown  

Science Conference Proceedings (OSTI)

We report that graphene grown by molecular beam epitaxy from solid carbon (CMBE) on (0001) SiC in the presence of unintentional oxygen exhibits a small bandgap on the order of tens of meV. The presence of bandgaps is confirmed by temperature dependent Hall effect and resistivity measurements. X-ray photoelectron spectroscopy (XPS) measurements suggest that oxygen incorporates into the SiC substrate in the form of O-Si-C and not into the graphene as graphene oxide or some other species. The effect is independent of the carrier type of the graphene. Temperature dependent transport measurements show the presence of hopping conduction in the resistivity and a concurrent disappearance of the Hall voltage. Interactions between the graphene layers and the oxidized substrate are believed to be responsible for the bandgap.

Park, Jeongho; Mitchel, W. C.; Back, Tyson C. [Air Force Research Laboratory, Materials and Manufacturing Directorate (AFRL/RXPS), Wright-Patterson AFB, Ohio 45433-7707 (United States); Elhamri, Said [Department of Physics, University of Dayton, Dayton, Ohio 45469 (United States)

2012-03-26T23:59:59.000Z

211

Hydrogen Atom in Relativistic Motion  

E-Print Network (OSTI)

The Lorentz contraction of bound states in field theory is often appealed to in qualitative descriptions of high energy particle collisions. Surprisingly, the contraction has not been demonstrated explicitly even in simple cases such as the hydrogen atom. It requires a calculation of wave functions evaluated at equal (ordinary) time for bound states in motion. Such wave functions are not obtained by kinematic boosts from the rest frame. Starting from the exact Bethe-Salpeter equation we derive the equal-time wave function of a fermion-antifermion bound state in QED, i.e., positronium or the hydrogen atom, in any frame to leading order in alpha. We show explicitly that the bound state energy transforms as the fourth component of a vector and that the wave function of the fermion-antifermion Fock state contracts as expected. Transverse photon exchange contributes at leading order to the binding energy of the bound state in motion. We study the general features of the corresponding fermion-antifermion-photon Fock states, and show that they do not transform by simply contracting. We verify that the wave function reduces to the light-front one in the infinite momentum frame.

M. Jarvinen

2004-11-16T23:59:59.000Z

212

Atomic resolution of Lithium Ions in LiCoO  

SciTech Connect

LiCoO2 is the most common lithium storage material for lithium rechargeable batteries, used widely to power portable electronic devices such as laptop computers. Lithium arrangements in the CoO2 framework have a profound effect on the structural stability and electrochemical properties of LixCoO2 (0 < x < 1), however, probing lithium ions has been difficult using traditional X-ray and neutron diffraction techniques. Here we have succeeded in simultaneously resolving columns of cobalt, oxygen, and lithium atoms in layered LiCoO2 battery material using experimental focal series of LiCoO2 images obtained at sub-Angstrom resolution in a mid-voltage transmission electron microscope. Lithium atoms are the smallest and lightest metal atoms, and scatter electrons only very weakly. We believe our observations of lithium to be the first by electron microscopy, and that they show promise to direct visualization of the ordering of lithium and vacancy in LixCoO2.

Shao-Horn, Yang; Croguennec, Laurence; Delmas, Claude; Nelson, Chris; O' Keefe, Michael A.

2003-03-18T23:59:59.000Z

213

Charge transfer and formation of reduced Ce{sup 3+} upon adsorption of metal atoms at the ceria (110) surface  

Science Conference Proceedings (OSTI)

The modification of cerium dioxide with nanoscale metal clusters is intensely researched for catalysis applications, with gold, silver, and copper having been particularly well studied. The interaction of the metal cluster with ceria is driven principally by a localised interaction between a small number of metal atoms (as small as one) and the surface and understanding the fundamentals of the interaction of metal atoms with ceria surfaces is therefore of great interest. Much attention has been focused on the interaction of metals with the (111) surface of ceria, since this is the most stable surface and can be grown as films, which are probed experimentally. However, nanostructures exposing other surfaces such as (110) show high activity for reactions including CO oxidation and require further study; these nanostructures could be modified by deposition of metal atoms or small clusters, but there is no information to date on the atomic level details of metal-ceria interactions involving the (110) surface. This paper presents the results of density functional theory (DFT) corrected for on-site Coulomb interactions (DFT+U) calculations of the adsorption of a number of different metal atoms at an extended ceria (110) surface; the metals are Au, Ag, Cu, Al, Ga, In, La, Ce, V, Cr, and Fe. Upon adsorption all metals are oxidised, transferring electron(s) to the surface, resulting in localised surface distortions. The precise details depend on the identity of the metal atom. Au, Ag, Cu each transfer one electron to the surface, reducing one Ce ion to Ce{sup 3+}, while of the trivalent metals, Al and La are fully oxidised, but Ga and In are only partially oxidised. Ce and the transition metals are also partially oxidised, with the number of reduced Ce ions possible in this surface no more than three per adsorbed metal atom. The predicted oxidation states of the adsorbed metal atoms should be testable in experiments on ceria nanostructures modified with metal atoms.

Nolan, Michael [Tyndall National Institute, University College Cork, Lee Maltings, Prospect Row, Cork (Ireland)

2012-04-07T23:59:59.000Z

214

Media Advisory: Site-wide Safety Standards | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Media Advisory: Site-wide Safety Standards Media Advisory: Site-wide Safety Standards Media Advisory: Site-wide Safety Standards August 1, 2012 - 12:00pm Addthis Media Contacts Michael Turner, MSA michael_j_turner@rl.gov 509-376-2872 What: Department of Energy to announce two additions to the Hanford Site-wide Safety Standards - a set of 14 areas where Hanford contractors have collaborated to establish one uniform standard to guide safe operations. The latest additions to the Site-wide Safety Standards are Fall Protection and Electrical Safety. DOE Hanford management will explain the significance of the Site-wide Safety Standards, their use and application at the Hanford Site, the benefits to workers and the example Hanford is setting for excellence in safety. Media will then be offered a demonstration of Fall Protection training, along with other training programs at the DOE's Volpentest HAMMER Training Center, operated by Mission Support Alliance.

215

Executive Order 13583, Establishing a Coordinated Government-Wide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Executive Order 13583, Establishing a Coordinated Government-Wide Executive Order 13583, Establishing a Coordinated Government-Wide Initiative to Promote Diversity and Inclusion in the Federal Workforce Executive Order 13583, Establishing a Coordinated Government-Wide Initiative to Promote Diversity and Inclusion in the Federal Workforce August 18, 2011 - 11:15am Addthis Executive Order 13583 Established a "coordinated government-wide initiative to promote diversity and inclusion in the federal workforce". Wherever possible, the Federal Government must also seek to consolidate compliance efforts established through related or overlapping statutory mandates, directions from Executive Orders, and regulatory requirements. Addthis Related Articles A Government-Wide Approach to a Diverse Workforce Executive Order 13583, Establishing a Coordinated Government-Wide Initiative to Promote Diversity and Inclusion in the Federal Workforce

216

Definition: Wide Area Monitoring, Visualization, & Control | Open Energy  

Open Energy Info (EERE)

Wide Area Monitoring, Visualization, & Control Wide Area Monitoring, Visualization, & Control Jump to: navigation, search Dictionary.png Wide Area Monitoring, Visualization, & Control Wide area monitoring and visualization requires time synchronized sensors, communications, and information processing that make it possible for the condition of the bulk power system to be observed and understood in real-time so that protective, preventative, or corrective action can be taken.[1] Related Terms Wide area, bes emergency, sustainability, smart grid References ↑ SmartGrid.gov 'Description of Functions' An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Wide_Area_Monitoring,_Visualization,_%26_Control&oldid=502579

217

CTrigger: Exposing Atomicity Violation Bugs from Their Hiding Places  

E-Print Network (OSTI)

of the two molecules, broken down by atom, helps the user to understand which atoms of the drug and protein

Lu, Shan

218

Monitoring atom-atom entanglement and decoherence in a solvable tripartite open system in cavity QED  

E-Print Network (OSTI)

We present a fully analytical solution of the dynamics of two strongly-driven atoms resonantly coupled to a dissipative cavity field mode. We show that an initial atom-atom entanglement cannot be increased. In fact, the atomic Hilbert space divides into two subspaces, one of which is decoherence free so that the initial atomic entanglement remains available for applications, even in presence of a low enough atomic decay rate. In the other subspace a measure of entanglement, decoherence, and also purity, are described by a similar functional behavior that can be monitored by joint atomic measurements. Furthermore, we show the possible generation of Schr\\"odinger-cat-like states for the whole system in the transient regime, as well as of entanglement for the cavity field and the atom-atom subsystems conditioned by measurements on the complementary subsystem.

Matteo Bina; Federico Casagrande; Alfredo Lulli; Enrique Solano

2007-11-08T23:59:59.000Z

219

934 / JOURNAL OF ENVIRONMENTAL ENGINEERING / OCTOBER 2000 CHLORINATED SOLVENT COMETABOLISM BY BUTANE-GROWN  

E-Print Network (OSTI)

BY BUTANE-GROWN MIXED CULTURE By Young Kim,1 Daniel J. Arp,2 and Lewis Semprini3 ABSTRACT: A survey of aerobic cometabolism of chlorinated aliphatic hydrocarbons by a butane-grown mixed culture was performed and was inhibited by butane and inactivated by acetylene, indicating that a monooxygenase enzyme was likely involved

Semprini, Lewis

220

The Primary Standards Laboratory (PSL) maintains a wide variety...  

NLE Websites -- All DOE Office Websites (Extended Search)

Nuclear Security Administration under contract DE-AC04-94AL85000. The Primary Standards Laboratory (PSL) maintains a wide variety of primary thermometry standards to assure...

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

The Primary Standards Laboratory (PSL) maintains a wide variety...  

NLE Websites -- All DOE Office Websites (Extended Search)

Nuclear Security Administration under contract DE-AC04-94AL85000. The Primary Standards Laboratory (PSL) maintains a wide variety of primary standards to assure accurate...

222

The Primary Standards Laboratory (PSL) maintains a wide variety...  

NLE Websites -- All DOE Office Websites (Extended Search)

Nuclear Security Administration under contract DE-AC04-94AL85000. The Primary Standards Laboratory (PSL) maintains a wide variety of primary acceleration and shock...

223

Flow Phenomena in an Extra Wide CSP-mold-experimental ...  

Science Conference Proceedings (OSTI)

Presentation Title, Flow Phenomena in an Extra Wide CSP-mold-experimental Investigations. Author(s), Rdiger Bahrmann, Antje Rckert, Herbert Pfeifer.

224

World-Wide Progress Review on Superconductor Development  

Science Conference Proceedings (OSTI)

Oct 19, 2010 ... Recent Developments in High Temperature Superconductivity: World-Wide ... Superconductivity Efforts at the US Department of Energy (DOE):...

225

EA-1583: Final Site-wide Environmental Assessment | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Assessment EA-1583: Final Site-wide Environmental Assessment RMOTCNaval Petroleum Reserve No. 3 (October 2008) SUMMARY: The U.S. Departmem of Energy (DOE) is...

226

NREL: Climate Neutral Research Campuses - Campus-Wide Measures...  

NLE Websites -- All DOE Office Websites (Extended Search)

Campus-Wide Measures Have Greater Potential Pursuing climate neutrality on research campuses fits into the bigger picture of addressing the impacts of climate change and...

227

Effective Community-Wide Policy Technical Assistance: The NREL...  

Open Energy Info (EERE)

NRELDOE Approach Jump to: navigation, search Tool Summary Name: Effective Community-Wide Policy Technical Assistance: The NRELDOE Approach AgencyCompany Organization: National...

228

Draft Site-Wide Environmental Impact Statement Nevada | National...  

National Nuclear Security Administration (NNSA)

> About Us > Our Operations > NNSA Office of General Counsel > National Environmental Policy Act (NEPA) > NEPA Reading Room > Draft Site-Wide Environmental Impact Statement...

229

EA-1422: Final Site-wide Environmental Assessment | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Environmental Assessment EA-1422: Final Site-wide Environmental Assessment Sandia National Laboratories Sandia National Laboratories (SNL) is one of three national...

230

Sandia National Laboratories Site-Wide Environmental Impact Statement...  

National Nuclear Security Administration (NNSA)

Site-Wide Environmental Impact Statement | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency...

231

NNSS Final Site-Wide Environmental Impact Statement (SWEIS) ...  

National Nuclear Security Administration (NNSA)

NNSS Final Site-Wide Environmental Impact Statement (SWEIS) | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the...

232

Section S Summary of the Site-Wide Environmental Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

process that was completed in May 2002. In accordance with DOE NEPA implementing regulations, DOE is required to evaluate the Site- Wide Environmental Assessment (EA) after...

233

EIS-0281: Final Site-Wide Environmental Impact Statement | Department...  

NLE Websites -- All DOE Office Websites (Extended Search)

Final Site-Wide Environmental Impact Statement Sandia National LaboratoriesNew Mexico DOE proposes to continue operating the Sandia National LaboratoriesNew Mexico (SNL...

234

Atomic force microscope: Enhanced sensitivity  

SciTech Connect

Atomic force microscopes (AFMs) are a recent development representing the state of the art in measuring ultrafine surface features. Applications are found in such fields of research as biology, microfabrication, material studies, and surface chemistry. Fiber-optic interferometer techniques developed at LLNL offer the potential of improving the vertical resolution of these instruments by up to 2 orders of magnitude. We are attempting to replace the current AFM measurement scheme, which consists of an optical beam deflection approach, with our fiber-optic interferometer scheme, a much more sensitive displacement measurement technique. In performing this research, we hope to accomplish two important goals; (1) to enhance the sensitivity of the AFM, and (2) to achieve important improvements in our fiber-optic interferometer technology.

Davis, D.T.

1995-06-01T23:59:59.000Z

235

Hyperbaric hydrothermal atomic force microscope  

SciTech Connect

A hyperbaric hydrothermal atomic force microscope (AFM) is provided to image solid surfaces in fluids, either liquid or gas, at pressures greater than normal atmospheric pressure. The sample can be heated and its surface imaged in aqueous solution at temperatures greater than 100.degree. C. with less than 1 nm vertical resolution. A gas pressurized microscope base chamber houses the stepper motor and piezoelectric scanner. A chemically inert, flexible membrane separates this base chamber from the sample cell environment and constrains a high temperature, pressurized liquid or gas in the sample cell while allowing movement of the scanner. The sample cell is designed for continuous flow of liquid or gas through the sample environment.

Knauss, Kevin G. (Livermore, CA); Boro, Carl O. (Milpitas, CA); Higgins, Steven R. (Laramie, WY); Eggleston, Carrick M. (Laramie, WY)

2002-01-01T23:59:59.000Z

236

Cavity cooling of a single atom  

E-Print Network (OSTI)

All conventional methods to laser-cool atoms rely on repeated cycles of optical pumping and spontaneous emission of a photon by the atom. Spontaneous emission in a random direction is the dissipative mechanism required to remove entropy from the atom. However, alternative cooling methods have been proposed for a single atom strongly coupled to a high-finesse cavity; the role of spontaneous emission is replaced by the escape of a photon from the cavity. Application of such cooling schemes would improve the performance of atom cavity systems for quantum information processing. Furthermore, as cavity cooling does not rely on spontaneous emission, it can be applied to systems that cannot be laser-cooled by conventional methods; these include molecules (which do not have a closed transition) and collective excitations of Bose condensates, which are destroyed by randomly directed recoil kicks. Here we demonstrate cavity cooling of single rubidium atoms stored in an intracavity dipole trap. The cooling mechanism res...

Maunz, P; Schuster, I; Syassen, N; Pinkse, P W H; Rempe, G

2004-01-01T23:59:59.000Z

237

The Harnessed Atom | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Services » The Harnessed Atom Services » The Harnessed Atom The Harnessed Atom The Harnessed Atom The Harnessed Atom is a new middle school science, technology, engineering, and math (STEM) curriculum extension that focuses on nuclear science and energy. It offers teachers accurate, unbiased, and up-to-date information on the roles that energy and nuclear science play in our lives. The curriculum includes essential principles and fundamental concepts of energy science. This teacher's kit is an updated and expanded edition of the acclaimed 1985 Harnessed Atom curriculum from the U.S. Department of Energy. It was developed with extensive input from classroom teachers across the country in pilot test reviews and workshops, as well as technical reviews from scientists and experts at universities, professional societies, and

238

Manhattan Project: Atomic Bombardment, 1932-1938  

Office of Scientific and Technical Information (OSTI)

Solvay Physics Conference, Brussels, October 1933 ATOMIC BOMBARDMENT Solvay Physics Conference, Brussels, October 1933 ATOMIC BOMBARDMENT (1932-1938) Events > Atomic Discoveries, 1890s-1939 A Miniature Solar System, 1890s-1919 Exploring the Atom, 1919-1932 Atomic Bombardment, 1932-1938 The Discovery of Fission, 1938-1939 Fission Comes to America, 1939 M. Stanley Livingston and Ernest O. Lawrence in front of a 27-inch cyclotron, Rad Lab, University of California, Berkeley, 1934. In the 1930s, scientists learned a tremendous amount about the structure of the atom by bombarding it with sub-atomic particles. Ernest O. Lawrence's cyclotron, the Cockroft-Walton machine, and the Van de Graaff generator, developed by Robert J. Van de Graaff at Princeton University, were particle accelerators designed to bombard the nuclei of various elements to disintegrate atoms. Attempts of the early 1930s to split atoms, however, required huge amounts of energy because the first accelerators used proton beams and alpha particles as sources of energy. Since protons and alpha particles are positively charged, they Albert Einstein met substantial resistance from the positively charged target nucleus when they attempted to penetrate atoms. Even high-speed protons and alpha particles scored direct hits on a nucleus only approximately once in a million tries. Most simply passed by the target nucleus. Not surprisingly, Ernest Rutherford, Albert Einstein (right), and Niels Bohr regarded particle bombardment as useful in furthering knowledge of nuclear physics but believed it unlikely to meet public expectations of harnessing the power of the atom for practical purposes anytime in the near future. In a 1933 interview, Rutherford called such expectations "moonshine." Einstein compared particle bombardment with shooting in the dark at scarce birds, while Bohr, the Danish Nobel laureate, agreed that the chances of taming atomic energy were remote.

239

Theory of atomic motion in resonant radiation  

SciTech Connect

Atomic motion in resonant and near resonant electromagnetic radiation is investigated theoretically. The exposition begins with a study of atomic motion in a resonant standing light wave, with a view toward isotope separation by selective photodeflection, and proceeds to the investigation of more general problems of atomic motion in resonant radiation. The body of the work consists of six chapters, each of which was prepared as a manuscript for publication in the open literature.

Cook, R.J.

1980-03-01T23:59:59.000Z

240

Method for enhanced atomization of liquids  

DOE Patents (OSTI)

In a process for atomizing a slurry or liquid process stream in which a slurry or liquid is passed through a nozzle to provide a primary atomized process stream, an improvement which comprises subjecting the liquid or slurry process stream to microwave energy as the liquid or slurry process stream exits the nozzle, wherein sufficient microwave heating is provided to flash vaporize the primary atomized process stream.

Thompson, Richard E. (27121 Puerta del Oro, Mission Viejo, CA 92691); White, Jerome R. (44755 Wyandotte, Hemet, CA 92544)

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

APIVT-Grown Silicon Thin Layers and PV Devices: Preprint  

DOE Green Energy (OSTI)

Large-grained (5-20 ..mu..m) polycrystalline silicon layers have been grown at intermediate temperatures of 750-950C directly on foreign substrates without a seeding layer by iodine vapor transport at atmospheric pressure with rates as high as 3 mm/min. A model is constructed to explain the atypical temperature dependence of growth rate. We have also used this technique to grow high-quality epitaxial layers on heavily doped CZ-Si and on upgraded MG-Si substrates. Possible solar cell structures of thin-layer polycrystalline silicon on foreign substrates with light trapping have been examined, compared, and optimized by two-dimensional device simulations. The effects of grain boundary re-combination on device performance are presented for two grain sizes of 2 and 20 mm. We found that 104 cm/s recombination velocity is adequate for 20-m m grain-sized thin silicon, whereas a very low recombination velocity of 103 cm/s must be accomplished in order to achieve reasonable performance for a 2- mm grain-sized polycrystalline silicon device.

Wang, T. H.; Ciszek, T. F.; Page, M. R.; Bauer, R. E.; Wang, Q.; Landry, M. D.

2002-05-01T23:59:59.000Z

242

NIST Handbook of Basic Atomic Spectroscopic Data  

Science Conference Proceedings (OSTI)

... The compilation includes data for the neutral and singly-ionized atoms of all elements hydrogen through einsteinium (Z = 1-99). ... Access the Data. ...

2011-12-09T23:59:59.000Z

243

NIST Atomic Form Factors: Concerns with standard ...  

Science Conference Proceedings (OSTI)

... pair production cross-section in the nuclear field (? n ... upon angle (in f 0 ) and energy (in f ... All general theories make the isolated atom approximation ...

244

A History of the Atomic Energy Commission  

Energy.gov (U.S. Department of Energy (DOE))

A History of the Atomic Energy Commission - written by Alice L. BuckWashington, D.C.: U.S. Department of Energy, July 1983.41 pp.

245

Atom Probe Tomography and Transmission Electron Microscopy ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Atom probe tomography (APT) and analytical transmission .... of a Leaking Type 316 Socket Weld in a Boron Injection Tank Sampling Line.

246

Prospects for Atomic-Scale Tomography  

Science Conference Proceedings (OSTI)

Abstract Scope, Atomic-scale tomography (AST) may be defined as any technique that ... Initial Age Hardening and Nanostructural Evolution in a Cu-Ni-P Alloy.

247

Atom Manipulation with the Scanning Tunneling Microscope  

Science Conference Proceedings (OSTI)

... nanostructure from an unknown random collection of atoms without human intervention. ... a set of extensible rules, and allows for error correction. ...

2013-04-26T23:59:59.000Z

248

Materials Synthesis from Atoms to Systems | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

to produce unique single crystals and epitaxial structures that are deposited with atomic-level precision is critical for many applications, such as thermoelectrics,...

249

NIST Unveils Chip-Scale Atomic Clock  

Science Conference Proceedings (OSTI)

... 100 times smaller than any other atomic clockhas ... precise timekeeping in portable, battery-powered devices ... to be operated on batteries) and are ...

2012-12-20T23:59:59.000Z

250

Schroedinger's Cat in an Atomic Cage  

Science Conference Proceedings (OSTI)

... Schroedinger's Cat in an Atomic Cage. ... ``Schroedinger's cat'' soon became a shorthand way to refer to a whole class of superposed states. ...

251

Primary Atomic Frequency Standards at NIST  

Science Conference Proceedings (OSTI)

... a set of four quartz oscillators calibrated against the mean solar second [4 ... The cesium oven, operated near 100 C, creates a vapor of atoms that are ...

2001-02-04T23:59:59.000Z

252

NIST Atomic Physics Division 2000 - Current Directions  

Science Conference Proceedings (OSTI)

... Although these data are needed for magnetic fusion research, astronomy, and industry, there is ... Physics of Cold, Trapped Gases of Neutral Atoms. ...

253

Handbook of Basic Atomic Spectroscopic Data  

Science Conference Proceedings (OSTI)

... FW96 JR Fuhr and WL Wiese, NIST Atomic Transition Probability Tables, CRC Handbook of Chemistry and Physics, 77th ed., DR Lide, ed. CRC ...

2008-06-09T23:59:59.000Z

254

Critically Evaluated Atomic Transition Probabilities for Sulfur ...  

Science Conference Proceedings (OSTI)

... In this new work all ionization stages (except for hydro- genic) are covered. The data are presented in separate tables for each atom and ion. ...

2013-04-16T23:59:59.000Z

255

Quantization of Atomic and Nuclear Rest Masses  

E-Print Network (OSTI)

We were able to quantize phenomenologically the first time the atomic and nuclear rest masses. Note that this quantization rule is justified for atoms and nuclei with different A, N and Z and the nuclei and atoms represent a coherent synchronized systems - a complex of coupled oscillators (resonators). The cooperative resonance synchronization mechanisms are responsible for explanation of how the electron volt world can influence the nuclear mega electron volt world. It means that we created new possibilities for inducing and controlling nuclear reactions by atomic processes.

F. A. Gareev; G. F. Gareeva; I. E. Zhidkova

2007-08-02T23:59:59.000Z

256

Wide Bandgap Semiconductors: Essential to Our Technology Future |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wide Bandgap Semiconductors: Essential to Our Technology Future Wide Bandgap Semiconductors: Essential to Our Technology Future Wide Bandgap Semiconductors: Essential to Our Technology Future January 15, 2014 - 8:00am Addthis Learn how wide bandgap semiconductors could impact clean energy technology and our daily lives. | Video by Sarah Gerrity and Matty Greene, Energy Department. Dr. Ernest Moniz Dr. Ernest Moniz Secretary of Energy What are the key facts? North Carolina State University will lead the Energy Department's new manufacturing innovation institute for the next generation of power electronics, focusing on wide bandgap (WBG) semiconductors. Building America's leadership in WBG semiconductor manufacturing while driving down the cost of the technology could lead to more affordable products for businesses and consumers, billions of dollars in energy

257

Interconnection-Wide Transmission Planning Initiative: Topic A,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A, A, Interconnection-Level Analysis and Planning Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning A description of the requirements for Topic A for all Interconnections under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. Interconnection-Wide Transmission Planning Initiative: Topic A, Interconnection-Level Analysis and Planning More Documents & Publications Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Microsoft Word - yDE-FOA-0000068.rtf Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Western Interconnection on Electric Resource Planning

258

Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection-Wide Transmission Planning Initiative: Topic B, Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities A description of the requirements for Topic B for the Eastern Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation

259

Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection-Wide Transmission Planning Initiative: Topic B, Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Eastern Interconnection on Electric Resource Planning and Priorities A description of the requirements for Topic B for the Eastern Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation

260

As-grown deep-level defects in n-GaN grown by metal-organic chemical vapor deposition on freestanding GaN  

SciTech Connect

Traps of energy levels E{sub c}-0.26 and E{sub c}-0.61 eV have been identified as as-grown traps in n-GaN grown by metal-organic chemical vapor deposition by using deep level transient spectroscopy of the Schottky contacts fabricated by resistive evaporation. The additional traps of E{sub c}-0.13 and E{sub c}-0.65 eV have been observed in samples whose contacts are deposited by electron-beam evaporation. An increase in concentration of the E{sub c}-0.13 and E{sub c}-0.65 eV traps when approaching the interface between the contact and the GaN film supports our argument that these traps are induced by electron-beam irradiation. Conversely, the depth profiles of as-grown traps show different profiles between several samples with increased or uniform distribution in the near surface below 50 nm. Similar profiles are observed in GaN grown on a sapphire substrate. We conclude that the growth process causes these large concentrations of as-grown traps in the near-surface region. It is speculated that the finishing step in the growth process should be an essential issue in the investigation of the surface state of GaN.

Chen Shang; Ishikawa, Kenji; Hori, Masaru [Nagoya University, Chikusa, Nagoya 464-8603 (Japan); Honda, Unhi; Shibata, Tatsunari; Matsumura, Toshiya; Tokuda, Yutaka [Aichi Institute of Technology, Yakusa, Toyota 470-0392 (Japan); Ueda, Hiroyuki; Uesugi, Tsutomu; Kachi, Tetsu [Toyota Central R and D Laboratories, Inc., Yokomichi, Nagakute 480-1192 (Japan)

2012-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Electronic energy transfer between state selected metastable argon atoms and ground state krypton atoms  

E-Print Network (OSTI)

1007 Electronic energy transfer between state selected metastable argon atoms and ground state that the relative populations of the N2 (C, 3nu) product vibrational and rotational substates were dependent,0) atoms to ground state Kr atoms, which also shows large differences between the two metastable Ar states

Paris-Sud XI, Université de

262

Relativistic atomic physics at the SSC  

SciTech Connect

This report discusses the following proposed work for relativistic atomic physics at the Superconducting Super Collider: Beam diagnostics; atomic physics research; staffing; education; budget information; statement concerning matching funds; description and justification of major items of equipment; statement of current and pending support; and assurance of compliance.

NONE

1990-12-31T23:59:59.000Z

263

Atomic Data Needs for Modeling Photoionized Plasmas  

E-Print Network (OSTI)

Many of the fundamental questions in astrophysics can be addressed using spectroscopic observations of photoionized cosmic plasmas. However, the reliability of the inferred astrophysics depends on the accuracy of the underlying atomic data used to interpret the collected spectra. In this paper, we review some of the most glaring atomic data needs for better understanding photoionized plasmas.

Daniel Wolf Savin

2001-08-03T23:59:59.000Z

264

Cavity cooling of a single atom  

E-Print Network (OSTI)

All conventional methods to laser-cool atoms rely on repeated cycles of optical pumping and spontaneous emission of a photon by the atom. Spontaneous emission in a random direction is the dissipative mechanism required to remove entropy from the atom. However, alternative cooling methods have been proposed for a single atom strongly coupled to a high-finesse cavity; the role of spontaneous emission is replaced by the escape of a photon from the cavity. Application of such cooling schemes would improve the performance of atom cavity systems for quantum information processing. Furthermore, as cavity cooling does not rely on spontaneous emission, it can be applied to systems that cannot be laser-cooled by conventional methods; these include molecules (which do not have a closed transition) and collective excitations of Bose condensates, which are destroyed by randomly directed recoil kicks. Here we demonstrate cavity cooling of single rubidium atoms stored in an intracavity dipole trap. The cooling mechanism results in extended storage times and improved localization of atoms. We estimate that the observed cooling rate is at least five times larger than that produced by free-space cooling methods, for comparable excitation of the atom.

P. Maunz; T. Puppe; I. Schuster; N. Syassen; P. W. H. Pinkse; G. Rempe

2004-03-03T23:59:59.000Z

265

Implementing Synchronous Coordinated Atomic Actions Based on  

E-Print Network (OSTI)

the execution of action participants. A very important decision was to structure any atomic action as a package: concurrent systems, atomicity, coordinated error recovery, fault tolerant software structuring, conversations to improve the structuring of cooperative concurrent systems and to incorporate fault tolerance

Newcastle upon Tyne, University of

266

Interaction of trapped ions with trapped atoms  

E-Print Network (OSTI)

In this thesis, I present results from two Paul-trap based ion traps carried out in the Vuleti? laboratory: the Atom-Ion trap for collision studies between cold atoms and cold ions, and the Cavity-Array trap for studying ...

Grier, Andrew T. (Andrew Todd)

2011-01-01T23:59:59.000Z

267

Fast Access to Distributed Atomic Memory  

Science Conference Proceedings (OSTI)

We study efficient and robust implementations of an atomic read-write data structure over an asynchronous distributed message-passing system made of reader and writer processes, as well as a number of servers implementing the data structure. We determine ... Keywords: Byzantine failures, atomic registers, distributed algorithms, fault-tolerance, shared-memory emulations, time-complexity

Partha Dutta; Rachid Guerraoui; Ron R. Levy; Marko Vukoli?

2010-08-01T23:59:59.000Z

268

Instead of splitting the atom --the  

E-Print Network (OSTI)

Instead of splitting the atom - - the principle behind the 1940s Manhattan Project that build of the Sun and the stars. BACK STAR POWER: ITER, BOLDEST NUCLEAR INITIATIVE SINCE MANHATTAN PROJECT Received infinite. Instead of splitting the atom -- the principle behind the 1940s Manhattan Project that build

269

Atomic magnetometer for human magnetoencephalograpy.  

SciTech Connect

We have developed a high sensitivity (<5 fTesla/{radical}Hz), fiber-optically coupled magnetometer to detect magnetic fields produced by the human brain. This is the first demonstration of a noncryogenic sensor that could replace cryogenic superconducting quantum interference device (SQUID) magnetometers in magnetoencephalography (MEG) and is an important advance in realizing cost-effective MEG. Within the sensor, a rubidium vapor is optically pumped with 795 laser light while field-induced optical rotations are measured with 780 nm laser light. Both beams share a single optical axis to maximize simplicity and compactness. In collaboration with neuroscientists at The Mind Research Network in Albuquerque, NM, the evoked responses resulting from median nerve and auditory stimulation were recorded with the atomic magnetometer and a commercial SQUID-based MEG system with signals comparing favorably. Multi-sensor operation has been demonstrated with two AMs placed on opposite sides of the head. Straightforward miniaturization would enable high-density sensor arrays for whole-head magnetoencephalography.

Schwindt, Peter; Johnson, Cort N.

2010-12-01T23:59:59.000Z

270

Cavity cooling of a single atom  

E-Print Network (OSTI)

All conventional methods to laser-cool atoms rely on repeated cycles of optical pumping and spontaneous emission of a photon by the atom. Spontaneous emission in a random direction is the dissipative mechanism required to remove entropy from the atom. However, alternative cooling methods have been proposed1, 2 for a single atom strongly coupled to a high-finesse cavity; the role of spontaneous emission is replaced by the escape of a photon from the cavity. Application of such cooling schemes would improve the performance of atom cavity systems for quantum information processing3, 4. Furthermore, as cavity cooling does not rely on spontaneous emission, it can be applied to systems that cannot be laser-cooled by conventional methods; these include molecules2 (which do not have a closed transition) and collective excitations of

P. Maunz; I. Schuster; N. Syassen; P. W. H. Pinkse; G. Rempe

2004-01-01T23:59:59.000Z

271

Oxidation Resistance of Reactive Atoms in Graphene  

SciTech Connect

We have found that reactive elements that are normally oxidized at room temperature are present as individual atoms or clusters on and in graphene. Oxygen is present in these samples but it is only detected in the thicker amorphous carbon layers present in the graphene specimens we have examined. However, we have seen no evidence that oxygen reacts with the impurity atoms and small clusters of these normally reactive elements when they are incorporated in the graphene layers. First principles calculations suggest that the oxidation resistance is due to kinetic effects such as preferential bonding of oxygen to nonincorporated atoms and H passivation. The observed oxidation resistance of reactive atoms in graphene may allow the use of these incorporated metals in catalytic applications. It also opens the possibility of designing and producing electronic, opto-electronic, and magnetic devices based on these normally reactive atoms.

Chisholm, Matthew F [ORNL; Duscher, Gerd [University of Tennessee, Knoxville (UTK); Windl, Wolfgang [Ohio State University

2012-01-01T23:59:59.000Z

272

Snap: Robust Tool for Internet-wide Operating System Fingerprinting  

E-Print Network (OSTI)

Different approaches have been developed for TCP/IP fingerprinting, but none of these approaches is suited for Internet-wide fingerprinting. In this work, we develop approaches that rigorously tackle the issue of noise and packet loss while carrying out Internet-wide fingerprinting. We then carry out an Internet-wide scan to determine the distribution of different operating systems on the Internet. The results of our scan indicate that there are approximately 8.9 million publicly accessible web-servers on the Internet running Linux, while there are nearly 9.6 million web-servers with different embedded operating systems.

Nandwani, Ankur Bharatbhushan

2010-12-01T23:59:59.000Z

273

EA-1422: Sandia National Laboratories Site-Wide Environmental  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

422: Sandia National Laboratories Site-Wide Environmental 422: Sandia National Laboratories Site-Wide Environmental Assessment/California EA-1422: Sandia National Laboratories Site-Wide Environmental Assessment/California SUMMARY Sandia National Laboratories (SNL) is one of three national laboratories that support the DOE's statutory responsibilities for nuclear weapons research and design, development of energy technologies, and basic scientific research. SNL is composed of four geographically separated facilities: Albuquerque, New Mexico (SNL/NM); Tonopah, Nevada; Kauai, Hawaii; and Livermore, California (SNL/CA). This SWEA focuses on SNL/CA. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD September 3, 2012 EA-1422-SA-01: Supplement Analysis Final Site-Wide Environmental Assessment for Sandia National

274

DOE-Wide NEPA Contracting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE-Wide NEPA Contracting DOE-Wide NEPA Contracting DOE-Wide NEPA Contracting DOE has seven indefinite delivery/indefinite quantity (task order) contracts for use by DOE Program and Field Offices nationwide, including the National Nuclear Security Agency (NNSA) and the Federal Energy Regulatory Commission.These contracts are for NEPA support services in preparing EISs and EAs, environmental reports and other documentation required by the Nuclear Regulatory Commission in its review of license applications, and other related environmental documents, such as floodplain and wetland assessments. The links above provide useful information to potential users of the DOE-wide NEPA contracts primarily DOE NEPA Compliance Officers, NEPA Document Managers, and Contracting Officers. The documents are public

275

Proposed Energy Transport Corridors: West-wide energy corridor programmatic  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Transport Corridors: West-wide energy corridor Energy Transport Corridors: West-wide energy corridor programmatic EIS, Draft Corridors - September 2007. Proposed Energy Transport Corridors: West-wide energy corridor programmatic EIS, Draft Corridors - September 2007. Map of the area covered by a programmatic environmental impact statement (PEIS), "Designation of Energy Corridors on Federal Land in the 11 Western States" (DOE/EIS-0386) to address the environmental impacts from the proposed action and the range of reasonable alternatives. The proposed action calls for designating more than 6,000 miles of energy transport corridors across the West. Proposed Energy Transport Corridors: West-wide energy corridor programmatic EIS, Draft Corridors - September 2007. More Documents & Publications

276

Federal Register Notice: National Nuclear Security Administration Site-Wide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Register Notice: National Nuclear Security Administration Register Notice: National Nuclear Security Administration Site-Wide Environmental Impact Statement for Sandia National Laboratories, New Mexico (SNL/NM) Federal Register Notice: National Nuclear Security Administration Site-Wide Environmental Impact Statement for Sandia National Laboratories, New Mexico (SNL/NM) Federal Register / Vol. 76, No. 156 / Friday, August 12, 2011 / Notices. National Nuclear Security Administration Site-Wide Environmental Impact Statement for Sandia National Laboratories, New Mexico (SNL/NM). NNSA.SWEIS_.SNL_.NM_.pdf More Documents & Publications EIS-0466: Re-opening of Public Scoping Period and Announcement of Additional Public Scoping Meetings EIS-0466: Notice of Intent to Prepare an Environmental Impact Statement EIS-0281: Notice of Intent to Prepare a Site-Wide Environmental Impact

277

Documentation of the AMIP Models on the World Wide Web  

Science Conference Proceedings (OSTI)

Summary documentation of the numerics, dynamics, and physics of models participating in the Atmospheric Model Intercomparison Project is now available on the Internet's World Wide Web. In this article the principal attributes of the electronic ...

Thomas J. Phillips

1996-06-01T23:59:59.000Z

278

Making every bit count in wide-area analytics  

Science Conference Proceedings (OSTI)

Many data sets, such as system logs, are generated from widely distributed locations. Current distributed systems often discard this data because they lack the ability to backhaul it efficiently, or to do anything meaningful with it at the distributed ...

Ariel Rabkin, Matvey Arye, Siddhartha Sen, Vivek Pai, Michael J. Freedman

2013-05-01T23:59:59.000Z

279

A Study of Transport Protocols for Wide Area Scientific Applications  

SciTech Connect

This is the final project report of award "A Study of Transport Protocols for Wide Area Scientific Applications", given by DOE in 2003 to Vishal Misra at Columbia University.

Vishal Misra

2011-03-01T23:59:59.000Z

280

DOE Issues Final Site-Wide Environmental Impact Statement for...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and operation of the NNSS (formerly known as the Nevada Test Site), the Tonopah Test Range, and two locations in Las Vegas, Nevada. The Site-Wide EIS analyzes reasonably...

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Depth resolved wide field illumination for biomedical imaging and fabrication  

E-Print Network (OSTI)

Nonlinear microscopic imaging is relatively slow due to the sequential nature of raster scanning. Recently, this limitation was overcome by developing a 3D-resolved wide-field two-photon microscope based on the concept of ...

So, Peter T. C.

282

Efficiently identifying significant associations in genome-wide association studies  

Science Conference Proceedings (OSTI)

Over the past several years, genome wide association studies (GWAS) have implicated hundreds of genes in common disease. More recently, the GWAS approach has been utilized to identify regions of the genome which harbor variation affecting gene expression ...

Emrah Kostem; Eleazar Eskin

2013-04-01T23:59:59.000Z

283

A system-wide productivity figure of merit  

Science Conference Proceedings (OSTI)

The goal of this note is to combine productivity and performance benchmark measurement and subjective evaluations into a single system-wide figure of merit that could, for example, be used for budget justifications and procurements. With simplifying ...

Declan Murphy; Thomas Nash; Lawrence Votta

2006-01-01T23:59:59.000Z

284

Definition: Reduced Wide-Scale Blackouts | Open Energy Information  

Open Energy Info (EERE)

will reduce the probability of wide-scale regional blackouts.1 Related Terms bes emergency, smart grid References SmartGrid.gov 'Description of Benefits' An i LikeLike...

285

Hewlett and Duncan - Atomic Shield | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Duncan - Atomic Shield Duncan - Atomic Shield Hewlett and Duncan - Atomic Shield Hewlett, Richard G. and Francis Duncan. Atomic Shield, 1947-1952. U.S. Atomic Energy Comission, 1972. The second volume of the three volume A History of the United States Atomic Energy Commission. Text in each PDF is fully searchable. "Hewlett and Duncan - Atomic Shield (complete).pdf" contains the complete text and images from Atomic Shield. 12mb "Hewlett and Duncan - Atomic Shield (figures only).pdf" contains hi-res (600dpi) scans of the images from Atomic Shield. 30mb Hewlett and Duncan - Atomic Shield (complete).pdf Hewlett and Duncan - Atomic Shield (figures only).pdf More Documents & Publications A History of the Atomic Energy Commission Hewlett and Duncan, Nuclear Navy, 1946-1962

286

Science with a wide-field UV transient explorer  

E-Print Network (OSTI)

The time-variable electromagnetic sky has been well-explored at a wide range of wavelengths. Numerous high-energy space missions take advantage of the dark Gamma-ray and X-ray sky and utilize very wide field detectors to provide almost continuous monitoring of the entire celestial sphere. In visible light, new wide-field ground-based surveys cover wide patches of sky with ever decreasing cadence, progressing from monthly-weekly time scale surveys to sub-night sampling. In the radio, new powerful instrumentation offers unprecedented sensitivity over wide fields of view, with pathfinder experiments for even more ambitious programs underway. In contrast, the ultra-violet (UV) variable sky is relatively poorly explored, even though it offers exciting scientific prospects. Here, we review the potential scientific impact of a wide-field UV survey on the study of explosive and other transient events, as well as known classes of variable objects, such as active galactic nuclei and variable stars. We quantify our pred...

Sagiv, I; Ofek, E O; Waxman, E; Aharonson, O; Nakar, E; Maoz, D; Trakhtenbrot, B; Kulkarni, S R; Phinney, E S; Topaz, J; Beichman, C; Murthy, J; Worden, S P

2013-01-01T23:59:59.000Z

287

On the energy of electric field in hydrogen atom  

E-Print Network (OSTI)

It is shown that hydrogen atom is a unique object in physics having negative energy of electric field, which is present in the atom. This refers also to some hydrogen-type atoms: hydrogen anti-atom, atom composed of proton and antiproton, and positronium.

Yuri Kornyushin

2009-05-27T23:59:59.000Z

288

AlGaAsSb/GaSb Distributed Bragg Reflectors Grown by Organometallic Vapor Phase Epitaxy  

SciTech Connect

The first AlGaAsSb/GaSb quarter-wave distributed Bragg reflectors grown by metallic vapor phase epitaxy are reported. The peak reflectance is 96% for a 10-period structure.

C.A. Wang; C.J. Vineis; D.R. Calawa

2002-02-13T23:59:59.000Z

289

Origami-inspired nanofabrication utilizing physical and magnetic properties of in situ grown carbon nanotubes  

E-Print Network (OSTI)

Carbon nanotubes (CNTs), in particular the vertically-aligned variety grown through a plasma enhanced chemical vapor deposition (PECVD)-based process, are highly versatile nanostructures that can be used in a variety of ...

In, Hyun Jin

2010-01-01T23:59:59.000Z

290

Nanomanipulation and nanofabrication with multi-probe STM: From individual atoms to nanowires  

SciTech Connect

The wide variety of nanoscale structures and devices demands novel tools for handling, assembly, and fabrication at nanoscopic positioning precision. The manipulation tools should allow for in situ characterization and testing of fundamental building blocks, such as nanotubes and nanowires, as they are built into functional devices. In this paper, a bottom-up technique for nanomanipulation and nanofabrication is reported by using a 4-probe scanning tunneling microscope (STM) combined with a scanning electron microscope (SEM). The applications of this technique are demonstrated in a variety of nanosystems, from manipulating individual atoms to bending, cutting, breaking carbon nanofibers, and constructing nanodevices for electrical characterizations. The combination of the wide field of view of SEM, the atomic position resolution of STM, and the flexibility of multiple scanning probes is expected to be a valuable tool for rapid prototyping in the nanoscience and nanotechnology.

Qin, Shengyong [ORNL; Kim, Tae Hwan [ORNL; Wang, Zhouhang [ORNL; Li, An-Ping [ORNL

2012-01-01T23:59:59.000Z

291

Time-Resolved Femtosecond Laser Desorption from Wide-BandGap Single Crystals  

Science Conference Proceedings (OSTI)

We have used femtosecond laser pulse pairs to measure the positive ion yield, from wide band-gap single crystals, as a function of time-delay between pulses. Two-pulse correlation allows direct observation of solid state and surface dynamics on an ultrafast timescale. The ion yield, from 265 nm irradiated MgO and KBr, depends critically on the time delay between two sub-threshold pulses. For example, the Mg+ desorption yield displays three distinct features; a coherence peak, followed by rise, and decay features. In contract, the yield of K+ from KBr displays only the coherence peak and picosecond decay features. The data suggest, that although the nanosecond ion desorption mechanism is dominated by defect photoabsorption, significant electron-hole pair production may contribute to the desorption mechanism following femtosecond excitation. Nanosecond photoexcitation of KBr near 6.4 eV leads to desorption of hyperthermal neutral bromine atoms without a significant thermal velocity component. Two-photon femtosecond excitation at 3.2 eV produces very similar results. Multiphoton femtosecond excitation provides an efficient excitation mechanism of the wide-gap material. These results are likely general for ionic crystals and are consistent with a recently described theoretical model.

Hess, Wayne P. (BATTELLE (PACIFIC NW LAB)); Joly, Alan G. (BATTELLE (PACIFIC NW LAB)); Beck, Kenneth M. (University of Central Florida ); Dickinson, J T. (8392); Claude R. Phipps

2002-09-01T23:59:59.000Z

292

Epitaxial VN,,001... Grown and Analyzed In situ by XPS and UPS. II. Analysis of Ar  

E-Print Network (OSTI)

Epitaxial VN,,001... Grown and Analyzed In situ by XPS and UPS. II. Analysis of Ar¿ Sputter Etched-welded to a Mo substrate heater. In Situ Preparation: The epitaxial VN 001 layers were grown in a multichamber that has been shown Ref. 1 to produce sharp 1 1 RHEED patterns. The target, a 5-cm-diam water-cooled V disk

Gall, Daniel

293

Instrument Series: Microscopy Atom Probe The LEAP  

NLE Websites -- All DOE Office Websites (Extended Search)

Atom Probe Atom Probe The LEAP ® 4000 XHR local electrode atom probe tomography instrument enabled the first- ever comprehensive and accurate 3-D chemical imaging studies of low electrical conductivity materials, such as ceramics, semiconductors and oxides. The LEAP capability is assisting EMSL's efforts to further scientific advancements in interface analysis and microstructural characterization, providing a new tool for understanding the relationship between the nanoscale structure of materials and their macroscopic properties. Research Applications Geochemistry - Studying chemical processes that compose rocks and soils has long been used to determine matter cycles and transport in the environment, which supports critical EMSL research in areas including bioremediation.

294

Cold Light from Hot Atoms and Molecules  

Science Conference Proceedings (OSTI)

The introduction of rare earth atoms and molecules into lighting discharges led to great advances in efficacy of these lamps. Atoms such as Dy, Ho and Ce provide excellent radiation sources for lighting applications, with rich visible spectra, such that a suitable combination of these elements can provide high quality white light. Rare earth molecules have also proved important in enhancing the radiation spectrum from phosphors in fluorescent lamps. This paper reviews some of the current aspects of lighting research, particularly rare earth chemistry and radiation, and the associated fundamental atomic and molecular data.

Lister, Graeme [OSRAM SYLVANIA, CRSL, 71 Cherry Hill Drive, Beverly, MA (United States); Curry, John J. [National Institute of Standards and Technology, Gaithersburg, MD (United States)

2011-05-11T23:59:59.000Z

295

ATOMIZATION METHOD OF MAKING URANIUM POWDER  

SciTech Connect

Atomized U powder was produced by forming an electric arc between two U electrodes in an inert atmosphere and sending a high velocity stream of inert gas through the arc. Uranium particles obtained by this method were of spherical shape; smaller particles contained mostly small grains, and larger particles wore characterizcd by larger grains. The particles were ductile and could be hotpressed to a compact of high density. The temporary equipment used for those preliminary tests on atomization was not adequate to control particle size. Suggestions for the production of atomized U powder of controllable quality are included. (arth)

Hausner, H.H.; Mansfield, H.

1950-08-01T23:59:59.000Z

296

Atom-photon entanglement generation and distribution  

E-Print Network (OSTI)

We extend an earlier model by Law {\\it et al.} \\cite{law} for a cavity QED based single-photon-gun to atom-photon entanglement generation and distribution. We illuminate the importance of a small critical atom number on the fidelity of the proposed operation in the strong coupling limit. Our result points to a promisingly high purity and efficiency using currently available cavity QED parameters, and sheds new light on constructing quantum computing and communication devices with trapped atoms and high Q optical cavities.

B. Sun; M. S. Chapman; L. You

2003-08-31T23:59:59.000Z

297

The Manhattan Project: Making the atomic bomb  

SciTech Connect

This article is a short history of the origins and development of the American atomic bomb program during World War II. Beginning with the scientific developments of the pre-war years, the monograph details the role of US government in conducting a secret, nationwide enterprise that took science from the laboratory and into combat with an entirely new type of weapon. The monograph concludes with a discussion of the immediate postwar period, the debate over the Atomic Energy Act of 1946, and the founding of the Atomic Energy Commission.

Gosling, F.G.

1994-09-01T23:59:59.000Z

298

1984 Bibliography of atomic and molecular processes  

Science Conference Proceedings (OSTI)

This annotated bibliography includes papers on atomic and molecular processes published during 1984. Sources include scientific journals, conference proceedings, and books. Each entry is designated by one or more of the 114 categories of atomic and molecular processes used by the Controlled Fusion Atomic Data Center, Oak Ridge National Laboratory to classify data. Also indicated is whether the work was experimental or theoretical, what energy range was covered, what reactants were investigated, and the country of origin of the first author. Following the bibliographical listing, the entries are indexed according to the categories and according to reactants within each subcategory.

Barnett, C.F.; Gilbody, H.B.; Gregory, D.C.; Griffin, P.M.; Havener, C.C.; Howard, A.M.; Kirkpatrick, M.I.; McDaniel, E.W.; Meyer, F.W.; Morgan, T.J. (comps.)

1985-04-01T23:59:59.000Z

299

1985 bibliography of atomic and molecular processes  

SciTech Connect

This annotated bibliography includes papers on atomic and molecular processes published during 1985. Sources include scientific journals, conference proceedings, and books. Each entry is designated by one or more of the 114 categories of atomic and molecular processes used by the Controlled Fusion Atomic Data Center, Oak Ridge National Laboratory to classify data. Also indicated is whether the work was experimental or theoretical, what energy range was covered, what reactants were investigated, and the country of origin of the first author. Following the bibliographical listing, the entries are indexed according to the categories and according to reactants within each subcategory.

Barnett, C.F.; Gilbody, H.B.; Gregory, D.C.; Griffin, P.M.; Havener, C.C.; Howald, A.M.; Kirkpatrick, M.I.; McDaniel, E.W.; Meyer, F.W.; Morgan, T.J. (comps.)

1986-06-01T23:59:59.000Z

300

Atomic Safety and Licensing Board Panel annual report, Fiscal year 1992  

SciTech Connect

In Fiscal Year 1992, the Atomic Safety and Licensing Board Panel (``the Panel``) handled 38 proceedings. The cases addressed issues in the construction, operation, and maintenance of commercial nuclear power reactors and other activities requiring a license from the Nuclear Regulatory Commission. This reports sets out the Panel`s caseload during the year and summarizes, highlights, and analyzes how the wide-ranging issues raised in those proceedings were addressed by the Panel`s judges and licensing boards.

Not Available

1993-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Residual stress stability in fiber textured stoichiometric AlN film grown using rf magnetron sputtering  

Science Conference Proceedings (OSTI)

The authors report on the stability of mechanical stress with aging and thermal cycling for columnar structured stoichiometric and homogeneous aluminum nitride thin films grown using radio frequency magnetron sputtering technique. The set of deposition parameters were optimized for the best possible orientation of crystallites in the c axis of compositionally stoichiometric films. The as-grown stress in the slightly nitrogen-rich film does not change when exposed to the atmosphere following deposition, while that in the nitrogen-deficient film, it changes due to oxidation. Additionally, the magnitude of as-grown stress has been found to depend on the substrate material in addition to the deposition parameters. The stress in the film grown on a Si(001) substrate was more tensile than in the film grown on a semi-insulating (si) GaAs(001) substrate for a given set of deposition parameters. Furthermore, the stress in the film grown on Si decreased with temperature, while that on si GaAs increased, indicating the thermally induced stress component to be the major component in the residual stress. Upon subsequent cooling the stress changes in both substrates followed the same path as of heating, thus exhibiting no hysteresis with thermal cycles between room temperature and 400 deg. C.

Sah, R. E.; Kirste, L.; Baeumler, M.; Hiesinger, P.; Cimalla, V.; Lebedev, V.; Baumann, H.; Zschau, H.-E. [Fraunhofer Institute for Applied Solid State Physics, Tullastrasse 72, 79108 Freiburg (Germany); Institut fuer Kernphysik, J. Goethe Universitaet, Max-von-Lauer-Str. 1, 60438 Frankfurt/M (Germany); DECHEMA e.V., Karl-Winnacker-Institut, Theodor-Heuss-Allee 25, 60486 Frankfurt/M (Germany)

2010-05-15T23:59:59.000Z

302

Charge exchange stripping cell measurements over a wide pressure range  

SciTech Connect

The efficiency of the stripping cell incorporated in a charge exchange analyzer has been measured over a pressure range of 1.8 to 130 mtorr and over an energy range of 1 to 130 keV/amu. In these measurements, a beam of hydrogen atoms was ionized by helium gas. As a by-product of the measurements, the scattering cross section was also measured. At the lowest pressure, the scattering cross section compared well with those measured previously; at high pressure, the cross section no longer followed an energy power law. The analyzer efficiency (defined as the fraction of the atoms that is ionized and not lost through scattering) can be modeled over the entire range of energy and pressure by including the measured scattering cross sections.

Colchin, R.J.; Roquemore, A.L.; Scott, S.D.

1988-01-01T23:59:59.000Z

303

The Manhattan Project: Making the Atomic Bomb | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Manhattan Project: Making the Atomic Bomb The Manhattan Project: Making the Atomic Bomb This report is an account of work on the atomic bomb. The Manhattan Project: Making the...

304

How long is the life span of an atom?  

NLE Websites -- All DOE Office Websites (Extended Search)

How long is the life span of an atom? Atoms are forever But let me explain. Atoms are made of a central core containing a collection of protons and neutrons. Almost all of the...

305

Studying coherence in ultra-cold atomic gases  

E-Print Network (OSTI)

This thesis will discuss the study of coherence properties of ultra-cold atomic gases. The atomic systems investigated include a thermal cloud of atoms, a Bose-Einstein condensate and a fermion pair condensate. In each ...

Miller, Daniel E. (Daniel Edward)

2007-01-01T23:59:59.000Z

306

Local Atomic Density of Microporous Carbons  

DOE Green Energy (OSTI)

We investigated the structure of two disordered carbons: activated carbon fibers (ACF) and ultramicroporous carbon (UMC). These carbons have highly porous structure with large surface areas and consequently low macroscopic density that should enhance adsorption of hydrogen. We used the atomic pair distribution function to probe the local atomic arrangements. The results show that the carbons maintain an in-plane local atomic structure similar to regular graphite, but the stacking of graphitic layers is strongly disordered. Although the local atomic density of these carbons is lower than graphite, it is only {approx}20% lower and is much higher than the macroscopic density due to the porosity of the structure. For this reason, the density of graphene sheets that have optimum separation for hydrogen adsorption is lower than anticipated.

Dmowski, Wojtek; Contescu, Cristian I.; Llobet, Anna; Gallego, Nidia C.; Egami, Takeskhi (Tennessee-K); (ORNL); (LANL)

2012-07-12T23:59:59.000Z

307

Radioactive Background Evaluation by Atom Counting  

SciTech Connect

We propose a new method of measuring 85Kr background levels by direct counting of impurity atoms. The beta-decay of 85Kr is a significant radioactive background for experiments that use liquified noble gases to search for dark matter and measure the low-energy solar neutrino flux. While there are several proposed methods for reducing Kr levels in these experiments, an independent technique is needed for measuring very low Kr levels. By selectively exciting Kr atoms to a metastable state, capturing them in a magneto-optical trap (MOT), and detecting fluorescence from the trapped atoms, individual Kr atoms can be counted with a high signal-to-noise ratio. This approach offers both higher sensitivity and shorter measurement times than more conventional techniques, with an estimated sensitivity of 3 x 10-14 in only 3 hours of integration.

Orzel, Chad [Department of Physics and Astronomy, Union College, Schenectady, NY 12308 (United States); McKinsey, Daniel [Yale University, New Haven, CT 06511 (United States)

2005-09-08T23:59:59.000Z

308

A History of the Atomic Energy Commission  

SciTech Connect

This pamphlet traces the history of the US Atomic Energy Commission's twenty-eight year stewardship of the Nation's nuclear energy program, from the signing of the Atomic Energy Act on August 1, 1946 to the signing of the Energy Reorganization Act on October 11, 1974. The Commission's early concentration on the military atom produced sophisticated nuclear weapons for the Nation's defense and made possible the creation of a fleet of nuclear submarines and surface ships. Extensive research in the nuclear sciences resulted in the widespread application of nuclear technology for scientific, medical and industrial purposes, while the passage of the Atomic Energy Act of 1954 made possible the development of a nuclear industry, and enabled the United States to share the new technology with other nations.

Buck, A.L.

1983-07-01T23:59:59.000Z

309

Buried Interface Analysis Using Atom Probe Tomography  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels Control of p-n ... Relationships in a Series of Co-Cr-Cu-Fe-Ni-Al High Entropy Alloys.

310

Atom Probe Tomography for Industrial Applications - Programmaster ...  

Science Conference Proceedings (OSTI)

Contributions of Atom Probe Tomography to the Understanding of Steels Control of p-n ... Relationships in a Series of Co-Cr-Cu-Fe-Ni-Al High Entropy Alloys.

311

Atomic physics of strongly correlated systems  

DOE Green Energy (OSTI)

Theoretical studies of electron correlations of doubly excited electrons in hyperspherical coordinates, and differential and total electron transfer cross sections in fast ion-atom collisions are reported. (GHT)

Lin, C.D.

1981-01-01T23:59:59.000Z

312

CHIANTI: An Atomic Database for Astrophysical Plasmas  

Science Conference Proceedings (OSTI)

Technical Paper / Selected papers from IAEA-NFRI Technical Meeting on Data Evaluation for Atomic, Molecular and Plasma-Material Interaction Processes in Fusion, September 4-7, 2012, Daejeon, Republic of Korea

E. Landi; K. P. Dere; P. R. Young; G. Del Zanna; H. E. Mason

313

Assessment of Atomic Data: Problems and Solutions  

Science Conference Proceedings (OSTI)

Technical Paper / Selected papers from IAEA-NFRI Technical Meeting on Data Evaluation for Atomic, Molecular and Plasma-Material Interaction Processes in Fusion, September 4-7, 2012, Daejeon, Republic of Korea

Kanti M. Aggarwal; Francis P. Keenan

314

Atomic Biology, Electrostatics, and Ionic Channels  

E-Print Network (OSTI)

I believe an atomic biology is needed to supplement present day molecular biology, if we are to design and understand proteins, as well as define, make, and use them.

Eisenberg, R S

2008-01-01T23:59:59.000Z

315

ac-driven atomic quantum motor  

E-Print Network (OSTI)

We invent an ac-driven quantum motor consisting of two different, interacting ultracold atoms placed into a ring-shaped optical lattice and submerged in a pulsating magnetic field. While the first atom carries a current, the second one serves as a quantum starter. For fixed zero-momentum initial conditions the asymptotic carrier velocity converges to a unique non-zero value. We also demonstrate that this quantum motor performs work against a constant load.

A. V. Ponomarev; S. Denisov; P. Hanggi

2009-02-03T23:59:59.000Z

316

ac-driven atomic quantum motor  

E-Print Network (OSTI)

We invent an ac-driven quantum motor consisting of two different, interacting ultracold atoms placed into a ring-shaped optical lattice and submerged in a pulsating magnetic field. While the first atom carries a current, the second one serves as a quantum starter. For fixed zero-momentum initial conditions the asymptotic carrier velocity converges to a unique non-zero value. We also demonstrate that this quantum motor performs work against a constant load.

Ponomarev, A V; Hnggi, P

2009-01-01T23:59:59.000Z

317

Resonant spectroscopy of the antihydrogen atom  

SciTech Connect

The spectra of the hydrogen and antihydrogen atoms in the presence of an external electric field are compared. It is shown that the nonresonant corrections to the transition frequency may contain terms linear in the electric field. The existence of these terms does not violate space and time parity and leads to a difference in the resonant spectroscopic measurements for the hydrogen and antihydrogen atoms in an external electric field.

Labzowsky, Leonti [St. Petersburg State University, 198504 Petrodvorets, St. Petersburg, Russia (Russian Federation); Petersburg Nuclear Physics Institute, 188350 Gatchina, St. Petersburg, Russia (Russian Federation); Solovyev, Dmitri [St. Petersburg State University, 198504 Petrodvorets, St. Petersburg, Russia (Russian Federation)

2003-07-01T23:59:59.000Z

318

Neutrino Spectroscopy with Atoms and Molecules  

E-Print Network (OSTI)

We give a comprehensive account of our proposed experimental method of using atoms or molecules in order to measure parameters of neutrinos still undetermined; the absolute mass scale, the mass hierarchy pattern (normal or inverted), the neutrino mass type (Majorana or Dirac), and the CP violating phases including Majorana phases. There are advantages of atomic targets, due to the closeness of available atomic energies to anticipated neutrino masses, over nuclear target experiments. Disadvantage of using atomic targets, the smallness of rates, is overcome by the macro-coherent amplification mechanism. The atomic or molecular process we use is a cooperative deexcitation of a collective body of atoms in a metastable level |e> emitting a neutrino pair and a photon; |e> -> |g> + gamma + nu_i nu_j where nu_i's are neutrino mass eigenstates. The macro-coherence is developed by trigger laser irradiation. We discuss aspects of the macro-coherence development by setting up the master equation for the target quantum state and propagating electric field. With a choice of heavy target atom or molecule such as Xe or I_2 that has a large M1 x E1 matrix element between |e> and |g>, we show that one can determine three neutrino masses along with the mass hierarchy pattern by measuring the photon spectral shape. If one uses a target of available energy of a fraction of 1 eV, Majorana CP phases may be determined. Our master equation, when applied to E1 x E1 transition such as pH_2 vibrational transition Xv=1 -> 0, can describe explosive PSR events in which most of the energy stored in |e> is released within a few nanoseconds. The present paper is intended to be self-contained explaining some details related theoretical works in the past, and further reports new simulations and our ongoing experimental efforts of the project to realize the neutrino mass spectroscopy using atoms/molecules.

Atsushi Fukumi; Susumu Kuma; Yuki Miyamoto; Kyo Nakajima; Itsuo Nakano; Hajime Nanjo; Chiaki Ohae; Noboru Sasao; Minoru Tanaka; Takashi Taniguchi; Satoshi Uetake; Tomonari Wakabayashi; Takuya Yamaguchi; Akihiro Yoshimi; Motohiko Yoshimura

2012-11-21T23:59:59.000Z

319

Atomic scale electron vortices for nanoresearch  

Science Conference Proceedings (OSTI)

Electron vortex beams were only recently discovered and their potential as a probe for magnetism in materials was shown. Here we demonstrate a method to produce electron vortex beams with a diameter of less than 1.2 Angst . This unique way to prepare free electrons to a state resembling atomic orbitals is fascinating from a fundamental physics point of view and opens the road for magnetic mapping with atomic resolution in an electron microscope.

Verbeeck, J.; Van Tendeloo, G. [EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp (Belgium); Schattschneider, P.; Loeffler, S. [Institute for Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040 Wien (Austria); Lazar, S. [FEI Electron Optics, 5600 KA Eindhoven (Netherlands); Canadian Centre for Electron Microscopy and Department of Materials Science and Engineering, McMaster University, Main Street West, Hamilton Ontario, L8S4M1 (Canada); Stoeger-Pollach, M.; Steiger-Thirsfeld, A. [USTEM, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040 Wien (Austria)

2011-11-14T23:59:59.000Z

320

Scanning magnetoresistance microscopy of atom chips  

Science Conference Proceedings (OSTI)

Surface based geometries of microfabricated wires or patterned magnetic films can be used to magnetically trap and manipulate ultracold neutral atoms or Bose-Einstein condensates. We investigate the magnetic properties of such atom chips using a scanning magnetoresistive (MR) microscope with high spatial resolution and high field sensitivity. By comparing MR scans of a permanent magnetic atom chip to field profiles obtained using ultracold atoms, we show that MR sensors are ideally suited to observe small variations of the magnetic field caused by imperfections in the wires or magnetic materials which ultimately lead to fragmentation of ultracold atom clouds. Measurements are also provided for the magnetic field produced by a thin current-carrying wire with small geometric modulations along the edge. Comparisons of our measurements with a full numeric calculation of the current flow in the wire and the subsequent magnetic field show excellent agreement. Our results highlight the use of scanning MR microscopy as a convenient and powerful technique for precisely characterizing the magnetic fields produced near the surface of atom chips.

Volk, M.; Whitlock, S.; Wolff, C. H.; Hall, B. V.; Sidorov, A. I. [ARC Centre of Excellence for Quantum-Atom Optics and Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Hawthorn, Victoria 3122 (Australia)

2008-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Interconnection-Wide Transmission Planning Initiative: Topic B, State  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

State Agency Input Regarding Electric Resource and Transmission Planning in State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency Input Regarding Electric Resource and Transmission Planning in the Texas Interconnection A description of the requirements for Topic B for the Texas Interconnect under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, State Agency Input Regarding Electric Resource and Transmission Planning in the

322

Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cooperation Among States in the Western Interconnection on Electric Cooperation Among States in the Western Interconnection on Electric Resource Planning and Priorities Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Western Interconnection on Electric Resource Planning and Priorities A description of the requirements for Topic B for the Western Interconnection under the Interconnection-Wide Transmission Planning Initiative, part of the American Recovery and Reinvestment Act. The fundamental purpose of the awards under Topic B is to facilitate dialogue and collaboration among the states in the respective interconnections (or among state agencies, in the Texas Interconnection). Interconnection-Wide Transmission Planning Initiative: Topic B, Cooperation Among States in the Western Interconnection on Electric Resource Planning

323

Wisconsin Tribe Performing State-Wide Audits on 'Energy Wasters' |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wisconsin Tribe Performing State-Wide Audits on 'Energy Wasters' Wisconsin Tribe Performing State-Wide Audits on 'Energy Wasters' Wisconsin Tribe Performing State-Wide Audits on 'Energy Wasters' August 24, 2010 - 11:00am Addthis Ho-Chunk Nation is conducting audits throughout Wisconsin to find energy wasters such as decrepit HVAC units. | File photo Ho-Chunk Nation is conducting audits throughout Wisconsin to find energy wasters such as decrepit HVAC units. | File photo Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? Ho-Chunk Nation received a $392,200 block grant under Recovery Act for energy audits. 30 tribal buildings will be audited across Nation's lands and audit recommendations could save tribes up to 30 percent on energy bills. Drive through Wisconsin, and you're bound to catch a glimpse of one of the

324

Bon MOT: Innovative Atom Trap Catches Highly Magnetic ...  

Science Conference Proceedings (OSTI)

... of a cloud of erbium atoms trapped and cooled and a ... all the while extracting energy and cooling them ... only a single laser and can cool erbium atoms ...

2011-07-18T23:59:59.000Z

325

U.S. Energy Secretary Addresses International Atomic Energy Agency...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Addresses International Atomic Energy Agency General Conference U.S. Energy Secretary Addresses International Atomic Energy Agency General Conference September 19, 2011 -...

326

August 1, 1946: Atomic Energy Act | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1, 1947, all atomic energy activities are transferred to the newly created Atomic Energy Commission in accordance with the Act. Energy.gov Careers & Internships For Staff &...

327

The Manhattan Project: Making of the Atomic Bomb | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Field Sites Power Marketing Administration Other Agencies You are here Home The Manhattan Project: Making of the Atomic Bomb The Manhattan Project: Making of the Atomic...

328

Charge It: Neutral Atoms Made to Act Like Electrically ...  

Science Conference Proceedings (OSTI)

... atoms (BEC) immersed in a constant magnetic field (B0). Using lasers (red arrows), the team alters the atoms' energy-momentum relationship ...

2011-04-01T23:59:59.000Z

329

A Well Collimated Quasi-Continuous Atom Laser  

Science Conference Proceedings (OSTI)

The Quasi-continuous Atom Laser. ... We can develop a rather complete analogy between the so-called "atom laser" and the traditional photon laser. ...

330

Integrated Sustainability Analysis of Atomic Layer Deposition for Microelectronics Manufacturing  

E-Print Network (OSTI)

of Manufacturing and Sustainability Improvement of Nano-Integrated Sustainability Analysis of Atomic Layergrowth at atomic scale. Sustainability of ALD technology

Yuan, Chris Yingchun; David Dornfeld

2010-01-01T23:59:59.000Z

331

Observation of Lithium Ions at Atomic Resolution Using an ...  

Science Conference Proceedings (OSTI)

Presentation Title, Observation of Lithium Ions at Atomic Resolution Using an ... at atomic resolution in several important electrode materials for Li-ion batteries.

332

Bettis and Knolls Atomic Power Laboratories | National Nuclear...  

National Nuclear Security Administration (NNSA)

Power Laboratories Bettis and Knolls Atomic Power Laboratories Bettis and Knolls Atomic Power Laboratories DE-NR0000031 Managed and Operated by Bechtel Marine Propulsion...

333

Atomic Energy Commission Explores Peaceful Uses of Nuclear Explosions...  

National Nuclear Security Administration (NNSA)

Our Jobs Working at NNSA Blog Home > About Us > Our History > NNSA Timeline > Atomic Energy Commission Explores Peaceful Uses of ... Atomic Energy Commission Explores Peaceful...

334

Energy Department and French Commission on Atomic Energy and...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Department and French Commission on Atomic Energy and Alternative Energies Sign New Research and Development Agreement Energy Department and French Commission on Atomic...

335

DOE - Office of Legacy Management -- Gen_Atomics  

NLE Websites -- All DOE Office Websites (Extended Search)

General Atomics Hot Cell Facility, California, Site A Oakland Operations Office site genatomicsmap The General Atomics Hot Cell Facility site was a research laboratory formerly...

336

EA-1053: Decontaminating and Decommissioning the General Atomics...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

53: Decontaminating and Decommissioning the General Atomics Hot Cell Facility, San Diego, California EA-1053: Decontaminating and Decommissioning the General Atomics Hot Cell...

337

Iowa Powder Atomization Technologies, Inc. | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Iowa Powder Atomization Technologies, Inc. America's Next Top Energy Innovator Challenge 6067 likes Iowa Powder Atomization Technologies, Inc. Ames Laboratory Iowa Powder...

338

A Vital Legacy - Biological and Environmental Research in the Atomic Age  

E-Print Network (OSTI)

ation of the Atomic Bomb Casualty Commission, established inthe atomic bombs. The Atomic Bomb Casualty Commis- sion was

Vaughan editor, Douglas

2010-01-01T23:59:59.000Z

339

Using a Collaborative Approach to Interconnection-Wide Transmission Analyses  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interconnection-Wide Planning in Interconnection-Wide Planning in the Eastern Interconnection EIPC Update for the DOE Electricity Advisory Committee October 20, 2011 David A. Whiteley Presentation Topics * Update on process and structure * Study results so far * Value unlocked * What's next 2 Update on Process and Structure * EIPC - 26 EI Planning Authorities (Planning Coordinators) * Integrate and analyze approved regional plans * Develop interregional expansion scenarios to be studied * Develop interregional transmission expansion options * Consistent with Orders 890 and 1000 * Self-funded * Primary activity is DOE funded interconnection studies project - 2 phases 3 Who are the PAs? * Alcoa Power Generating * American Transmission Co. * Duke Energy Carolinas * Electric Energy Inc. * Entergy *

340

Interconnection-Wide Transmission Planning Initiative - Meeting Calendars |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technology Development » Transmission Planning » Technology Development » Transmission Planning » Recovery Act Interconnection Transmission Planning » Interconnection-Wide Transmission Planning Initiative - Meeting Calendars Interconnection-Wide Transmission Planning Initiative - Meeting Calendars Click on the links below to access each awardee's meeting and events calendar. Eastern Interconnection Topic A Awardee: Eastern Interconnection Planning Collaborative Topic B Awardee: Eastern Interconnection States' Planning Council Western Interconnection Topic A Awardee: Western Electricity Coordinating Council Topic B Awardee: Western Governors' Association Texas Interconnection Topic A and B Awardee: Electric Reliability Council of Texas Electricity Advisory Committee Technology Development Transmission Planning

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Pulsed atomic layer epitaxy of quaternary AlInGaN layers  

Science Conference Proceedings (OSTI)

In this letter, we report on a material deposition scheme for quaternary Al{sub x}In{sub y}Ga{sub 1-x--y}N layers using a pulsed atomic layer epitaxy (PALE) technique. The PALE approach allows accurate control of the quaternary layer composition and thickness by simply changing the number of aluminum, indium, and gallium pulses in a unit cell and the number of unit cell repeats. Using PALE, AlInGaN layers with Al mole fractions in excess of 40% and strong room-temperature photoluminescence peaks at 280 nm can easily be grown even at temperatures lower than 800{sup o}C. {copyright} 2001 American Institute of Physics.

Zhang, J.; Kuokstis, E.; Fareed, Q.; Wang, H.; Yang, J.; Simin, G.; Asif Khan, M.; Gaska, R.; Shur, M.

2001-08-13T23:59:59.000Z

342

Atomic Quantum Simulation of Lattice Gauge-Higgs Model: Higgs Couplings and Emergence of Exact Local Gauge Symmetry  

E-Print Network (OSTI)

Recently, the possibility of quantum simulation of dynamical gauge fields was pointed out by using a system of cold atoms trapped on each link in an optical lattice. However, to implement exact local gauge invariance, fine-tuning the interaction parameters among atoms is necessary. In the present paper, we study the effect of violation of the U(1) local gauge invariance by relaxing the fine-tuning of the parameters and showing that a wide variety of cold atoms is still to be a faithful quantum simulator for a U(1) gauge-Higgs model containing a Higgs field sitting on sites. Clarification of the dynamics of this gauge-Higgs model sheds some lights upon various unsolved problems including the inflation process of the early universe. We study the phase structure of this model by Monte Carlo simulation, and also discuss the atomic characteristics of the Higgs phase in each simulator.

Kenichi Kasamatsu; Ikuo Ichinose; Tetsuo Matsui

2012-12-20T23:59:59.000Z

343

Theoretical Atomic Physics code development IV: LINES, A code for computing atomic line spectra  

SciTech Connect

A new computer program, LINES, has been developed for simulating atomic line emission and absorption spectra using the accurate fine structure energy levels and transition strengths calculated by the (CATS) Cowan Atomic Structure code. Population distributions for the ion stages are obtained in LINES by using the Local Thermodynamic Equilibrium (LTE) model. LINES is also useful for displaying the pertinent atomic data generated by CATS. This report describes the use of LINES. Both CATS and LINES are part of the Theoretical Atomic PhysicS (TAPS) code development effort at Los Alamos. 11 refs., 9 figs., 1 tab.

Abdallah, J. Jr.; Clark, R.E.H.

1988-12-01T23:59:59.000Z

344

Atoms for peace and war, 1953-1961: Eisenhower and the Atomic Energy Commission  

SciTech Connect

This third volume in the official history of the U.S. Atomic Energy Commission covers the years of the Eisenhower Administration.

Hewlett, Richard G.; Holl, Jack M.

1989-12-01T23:59:59.000Z

345

Deep Atomic Binding (DAB) Hypothesis: A New Approach of Fission Product Chemistry  

SciTech Connect

Former studies assumed that, after fission process occurs, the highly ionized new born atoms (20-22 positive charge), ionize the media in which they pass through before becoming stable atoms in a manner similar to 4-MeV ?-particles. Via ordinary chemical reactions with the surroundings, each stable atom has a probability to form chemical compound. Since there are about 35 different elemental atoms created through fission processes, a large number of chemical species were suggested to be formed. But, these suggested chemical species were not found in the environment after actual releases of FP during accidents like TMI (USA, 1979), and Chernobyl (former USSR, 1986), also the models based on these suggested reactions and species could not interpret the behavior of these actual species. It is assumed here that the ionization states of the new born atoms and the long term high temperature were not dealt with in an appropriate way and they were the reasons of former models failure. Our new approach of Deep Atomic Binding (DAB) based on the following: 1-The new born atoms which are highly ionized, 10-12 electrons associated with each nucleus, having a large probability to create bonds between them to form molecules. These bonds are at the L, or M shells, and we call it DAB. 2-The molecules stay in the reactor at high temperatures for long periods, so they undergo many stages of composition and decomposition to form giant molecules. By applying DAB approach, field data from Chernobyl, TMI and nuclear detonations could be interpreted with a wide coincidence resulted. (author)

Ajlouni, Abdul-Wali M.S. [Ministry of Energy and Mineral Resources (Jordan)

2006-07-01T23:59:59.000Z

346

Method of depositing wide bandgap amorphous semiconductor materials  

DOE Patents (OSTI)

A method of depositing wide bandgap p type amorphous semiconductor materials on a substrate without photosensitization by the decomposition of one or more higher order gaseous silanes in the presence of a p-type catalytic dopant at a temperature of about 200.degree. C. and a pressure in the range from about 1-50 Torr.

Ellis, Jr., Frank B. (Princeton Junction, NJ); Delahoy, Alan E. (Rocky Hill, NJ)

1987-09-29T23:59:59.000Z

347

Quality of Availability: Replica Placement for Widely Distributed Systems  

E-Print Network (OSTI)

In this paper, we take an availability-centric view on Quality of Service (QoS) and focus on the issues of providing availability guarantees for widely distributed systems such as web servers and peer-to-peer (P2P) file sharing systems.

Giwon On; Jens Schmitt; Ralf Steinmetz

2003-01-01T23:59:59.000Z

348

An Efficient Sound Source for Wide-Area RAFOS Navigation  

Science Conference Proceedings (OSTI)

To meet the expected need for wide-area acoustic navigation for Lagrangian studies of ocean circulation using RAFOS floats, a new and powerful sound source, a resonant pipe projector has been developed. It consists of a free-flooded open steel ...

T. Rossby; J. Ellis; D. C. Webb

1993-06-01T23:59:59.000Z

349

Photocell utilizing a wide-bandgap semiconductor material  

DOE Patents (OSTI)

A photocell comprises a p-i-n amorphous silicon structure having a wide bandgap layer adjacent to either the p-type or n-type layer. This structure reduces the absorption of light entering the photocell and the back-diffusion of minority carriers.

Carlson, David E. (Yardley, PA); Williams, Brown F. (Princeton, NJ)

1984-06-05T23:59:59.000Z

350

Network-wide deployment of intrusion detection and prevention systems  

Science Conference Proceedings (OSTI)

Traditional efforts for scaling network intrusion detection (NIDS) and intrusion prevention systems (NIPS) have largely focused on a single-vantage-point view. In this paper, we explore an alternative design that exploits spatial, network-wide opportunities ... Keywords: intrusion detection, network management

Vyas Sekar; Ravishankar Krishnaswamy; Anupam Gupta; Michael K. Reiter

2010-11-01T23:59:59.000Z

351

Google Sky, WorldWide Telescope & Celestia in the  

E-Print Network (OSTI)

Google Sky, WorldWide Telescope & Celestia in the Undergraduate Non-Science Major Classroom & Lab of Public Outreach Dept.Astronomy & Astrophysics University of Chicago Sky #12;Google Sky, World interactive labs and self-directed modules that utilize new, emerging, software tools, specifically Google Sky

Collar, Juan I.

352

Distributed wide-area traffic management for cloud services  

Science Conference Proceedings (OSTI)

The performance of interactive cloud services depends heavily on which data centers handle client requests, and which wide-area paths carry traffic. While making these decisions, cloud service providers also need to weigh operational considerations like ... Keywords: joint optimization, multi-homed routing, request mapping

Srinivas Narayana; Joe Wenjie Jiang; Jennifer Rexford; Mung Chiang

2012-06-01T23:59:59.000Z

353

Aliasing on the world wide web: prevalence and performance implications  

Science Conference Proceedings (OSTI)

Aliasing occurs in Web transactions when requests containing different URLs elicit replies containing identical data payloads. Conventional caches associate stored data with URLs and can therefore suffer redundant payload transfers due to aliasing and ... Keywords: DTD, HTTP, WWW, Zipf's law, aliasing, cache hierarchies, caching, duplicate suppression, duplicate transfer detection, hypertext transfer protocol, performance analysis, redundant transfers, resource modification, world wide web

Terence Kelly; Jeffrey Mogul

2002-05-01T23:59:59.000Z

354

Finite element form of FDV for widely varying flowfields  

Science Conference Proceedings (OSTI)

We present the Flowfield Dependent Variation (FDV) method for physical applications that have widely varying spatial and temporal scales. Our motivation is to develop a versatile numerical method that is accurate and stable in simulations with complex ... Keywords: Finite element, Hydrodynamics, Numerical methods, Shock waves, Special relativity

G. A. Richardson; J. T. Cassibry; T. J. Chung; S. T. Wu

2010-01-01T23:59:59.000Z

355

A Low-Power Wide-Linear-Range Transconductance Amplifier  

Science Conference Proceedings (OSTI)

The linear range of approximately 75 mV of traditional subthreshold transconductance amplifiers is too small for certain applicationsfor example, for filters in electronic cochleas, where it is desirable to handle loud sounds without ... Keywords: amplifier, cochlea, degeneration, dynamic range, low-power, noise, transconductance, wide-linear-range

Rahul Sarpeshkar; Richard F. Lyon; Carver Mead

1997-05-01T23:59:59.000Z

356

Development of vacuum ultraviolet absorption spectroscopy system for wide measurement range of number density using a dual-tube inductively coupled plasma light source  

SciTech Connect

A vacuum ultraviolet absorption spectroscopy system for a wide measurement range of atomic number densities is developed. Dual-tube inductively coupled plasma was used as a light source. The probe beam profile was optimized for the target number density range by changing the mass flow rate of the inner and outer tubes. This system was verified using cold xenon gas. As a result, the measurement number density range was extended from the conventional two orders to five orders of magnitude.

Kuwahara, Akira; Matsui, Makoto; Yamagiwa, Yoshiki [Department of Mechanical Engineering, Shizuoka University, 3-5-4 Johoku, Naka-ku, Hamamatsu 432-8561, Shizuoka (Japan)

2012-12-15T23:59:59.000Z

357

Improved Energy Conversion Efficiency in Wide-Bandgap Cu(In,Ga)Se2 Solar Cells: Preprint  

DOE Green Energy (OSTI)

This report outlines improvements to the energy conversion efficiency in wide bandgap (Eg>1.2 eV) solar cells based on CuIn1-xGaxSe2. Using (a) alkaline containing high temperature glass substrates, (b) elevated substrate temperatures 600?C-650?C and (c) high vacuum evaporation from elemental sources following NREL's three-stage process, we have been able to improve the performance of wider bandgap solar cells with 1.218% for absorber bandgaps ~1.30 eV and efficiencies ~16% for bandgaps up to ~1.45 eV. In comparing J-V parameters in similar materials, we establish gains in the open-circuit voltage and, to a lesser degree, the fill factor value, as the reason for the improved performance. The higher voltages seen in these wide gap materials grown at high substrate temperatures may be due to reduced recombination at the grain boundary of such absorber films. Solar cell results, absorber materials characterization, and experimental details are reported.

Contreras, M.; Mansfield, L.; Egaas, B.; Li, J.; Romero, M.; Noufi, R.; Rudiger-Voigt, E.; Mannstadt, W.

2011-07-01T23:59:59.000Z

358

Traffic flow wide-area surveillance system definition  

SciTech Connect

Traffic Flow Wide-Area Surveillance (TFWAS) is a system for assessing the state of traffic flow over a wide area for enhanced traffic control and improved traffic management and planning. The primary purpose of a TFWAS system is to provide a detailed traffic flow description and context description to sophisticated traffic management and control systems being developed or envisioned for the future. A successful TFWAS system must possess the attributes of safety, reconfigurability, reliability, and expandability. The primary safety premise of TFWAS is to ensure that no action or failure of the TFWAS system or its components can result in risk of injury to humans. A wide variety of communication techniques is available for use with TFWAS systems. These communication techniques can be broken down into two categories, landlines and wireless. Currently used and possible future traffic sensing technologies have been examined. Important criteria for selecting TFWAS sensors include sensor capabilities, costs, operational constraints, sensor compatibility with the infrastructure, and extent. TFWAS is a concept that can take advantage of the strengths of different traffic sensing technologies, can readily adapt to newly developed technologies, and can grow with the development of new traffic control strategies. By developing innovative algorithms that will take information from a variety of sensor types and develop descriptions of traffic flows over a wide area, a more comprehensive understanding of the traffic state can be provided to the control system to perform the most reasonable control actions over the entire wide area. The capability of characterizing the state of traffic over an entire region should revolutionize developments in traffic control strategies.

Allgood, G.O.; Ferrell, R.K.; Kercel, S.W.; Abston, R.A.; Carnal, C.L. [Oak Ridge National Lab., TN (United States); Moynihan, P.I. [Jet Propulsion Lab., Pasadena, CA (United States)

1994-11-01T23:59:59.000Z

359

Layered Atom Arrangements in Complex Materials  

Science Conference Proceedings (OSTI)

In this report, we develop an atom layer stacking model to describe systematically the crystal structures of complex materials. To illustrate the concepts, we consider a sequence of oxide compounds in which the metal cations progress in oxidation state from monovalent (M{sup 1+}) to tetravalent (M{sup 4+}). We use concepts relating to geometric subdivisions of a triangular atom net to describe the layered atom patterns in these compounds (concepts originally proposed by Shuichi Iida). We demonstrate that as a function of increasing oxidation state (from M{sup 1+} to M{sup 4+}), the layer stacking motifs used to generate each successive structure (specifically, motifs along a 3 symmetry axis), progress through the following sequence: MMO, MO, M{sub r}O, MO{sub r/s}O{sub u/v}, MOO (where M and O represent fully dense triangular atom nets and r/s and u/v are fractions used to describe partially filled triangular atom nets). We also develop complete crystallographic descriptions for the compounds in our oxidation sequence using trigonal space group R{bar 3}.

K.E. Sikafus; R.W.Grimes; S.M.Corish; A.R. Cleave; M.Tang; C.R.Stanek; B.P. Uberuaga; J.A.Valdez

2005-04-15T23:59:59.000Z

360

Method and apparatus for atomic imaging  

SciTech Connect

A method and apparatus for three dimensional imaging of the atomic environment of disordered adsorbate atoms are disclosed. The method includes detecting and measuring the intensity of a diffuse low energy electron diffraction pattern formed by directing a beam of low energy electrons against the surface of a crystal. Data corresponding to reconstructed amplitudes of a wave form is generated by operating on the intensity data. The data corresponding to the reconstructed amplitudes is capable of being displayed as a three dimensional image of an adsorbate atom. The apparatus includes a source of a beam of low energy electrons and a detector for detecting the intensity distribution of a DLEED pattern formed at the detector when the beam of low energy electrons is directed onto the surface of a crystal. A device responsive to the intensity distribution generates a signal corresponding to the distribution which represents a reconstructed amplitude of a wave form and is capable of being converted into a three dimensional image of the atomic environment of an adsorbate atom on the crystal surface.

Saldin, Dilano K. (Milwaukee, WI); de Andres Rodriquez, Pedro L. (Madrid, ES)

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

85More Atomic Fractions The single electron inside an atom can exist in many  

E-Print Network (OSTI)

85More Atomic Fractions The single electron inside an atom can exist in many different energy states. The lowest energy an electron can have is called the Ground State: this is the bottom rung on the ladder marked with an energy of '1' in the figure to the left. The electron must obey the Ladder Rule

362

Mill study of the quality yield, and mechanical properties of plywood produced from fast-grown loblolly pine  

SciTech Connect

Veneers were cut from 37 fast-grown pines 20-25 year old and from 27 trees with average growth rates in East Texas. After drying, the veneer was used to make plywood panels with a variety of assembly criteria. The yield and grade of veneer were substantially less from the fast-grown trees with a large core of juvenile wood, than from the slower-grown trees of similar size. The greatest reduction was in veneer grade, with fast-grown trees yielding less than 1% of input volume as grade C or better, while control trees exceeded 20%. Plywood made from fast-grown trees had mechanical properties that were marginal for the species, especially in stiffness and MOE. Bending strength was reduced, but less so. It is concluded that use of fast-grown, short-rotation trees will preclude the production of higher grade panels.

MacPeak, M.D.; Burkhart, L.F.; Weldon, D.

1987-01-01T23:59:59.000Z

363

An atom---molecule platform for quantum computing  

Science Conference Proceedings (OSTI)

We propose a combined atom---molecule system for quantum information processing in individual traps, such as provided by optical lattices. In this platform, different species of atoms--one atom carrying a qubit and the other enabling the interaction--are ... Keywords: Dipole-dipole interaction, Neutral atom quantum computing, Optical lattices, Polar molecules

Elena Kuznetsova; S. F. Yelin; Robin Ct

2011-12-01T23:59:59.000Z

364

Billion-Ton Update: Home-Grown Energy Resources Across the Nation |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Billion-Ton Update: Home-Grown Energy Resources Across the Nation Billion-Ton Update: Home-Grown Energy Resources Across the Nation Billion-Ton Update: Home-Grown Energy Resources Across the Nation August 11, 2011 - 3:59pm Addthis Total potential biomass resources by county in the contiguous U.S. from the baseline scenario of the Update (Figure 6.4, page 159) | Map from Billion-Ton Update Total potential biomass resources by county in the contiguous U.S. from the baseline scenario of the Update (Figure 6.4, page 159) | Map from Billion-Ton Update Paul Bryan Biomass Program Manager, Office of Energy Efficiency & Renewable Energy What does this mean for me? With continued developments in biorefinery capacity and technology, the feedstock resources identified in the report could produce about 85 billion gallons of biofuels -- enough to replace approximately 30 percent

365

Atomic Scale Characterization of Compound Semiconductors using Atom Probe Tomography: Preprint  

DOE Green Energy (OSTI)

Internal interfaces are critical in determining the performance of III-V multijunction solar cells. Studying these interfaces with atomic resolution using a combination of transmission electron microscopy (TEM), atom probe tomography (APT), and density functional calculations enables a more fundamental understanding of carrier dynamics in photovoltaic (PV) device structures. To achieve full atomic scale spatial and chemical resolution, data acquisition parameters in laser pulsed APT must be carefully studied to eliminate surface diffusion. Atom probe data with minimized group V ion clustering and expected stoichiometry can be achieved by adjusting laser pulse power, pulse repetition rate, and specimen preparation parameters such that heat flow away from the evaporating surface is maximized. Applying these improved analysis conditions to III-V based PV gives an atomic scale understanding of compositional and dopant profiles across interfaces and tunnel junctions and the initial stages of alloy clustering and dopant accumulation. Details on APT experimental methods and future in-situ instrumentation developments are illustrated.

Gorman, B. P.; Guthrey, H.; Norman, A. G.; Al-Jassim, M.; Lawrence, D.; Prosa, T.

2011-07-01T23:59:59.000Z

366

Spectroscopy and atomic force microscopy of biomass  

NLE Websites -- All DOE Office Websites (Extended Search)

Spectroscopy Spectroscopy and atomic force microscopy of biomass L. Tetard a,b , A. Passian a,b,n , R.H. Farahi a , U.C. Kalluri c , B.H. Davison c , T. Thundat a,b a Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA b Department of Physics, University of Tennessee, Knoxville, TN 37996, USA c Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA a r t i c l e i n f o Keywords: Atomic force microscopy Spectroscopy Plant cells Biomass Nanomechanics a b s t r a c t Scanning probe microscopy has emerged as a powerful approach to a broader understanding of the molecular architecture of cell walls, which may shed light on the challenge of efficient cellulosic ethanol production. We have obtained preliminary images of both Populus and switchgrass samples using atomic force microscopy (AFM). The results show distinctive features that are shared by switchgrass

367

Detecting Topological Phases in Cold Atoms  

E-Print Network (OSTI)

Chern insulators are band insulators which exhibit a gap in the bulk and gapless excitations in the edge. Detection of Chern insulators is a serious challenge in cold atoms since the Hall transport measurements are technically unrealistic for neutral atoms. By establishing a natural correspondence between the time-reversal invariant topological insulator and quantum anomalous Hall system, we show for a class of Chern insulators that the topology can be determined by only measuring Bloch eigenstates at highly symmetric points of the Brillouin zone (BZ). Furthermore, we introduce two experimental schemes including the spin-resolved Bloch oscillation to carry out the measurement. These schemes are highly feasible under realistic experimental conditions. Our results may provide a powerful tool to detect topological phases in cold atoms.

Xiong-Jun Liu; K. T. Law; T. K. Ng; Patrick A. Lee

2013-06-21T23:59:59.000Z

368

Atomic multipole relaxation rates near surfaces  

E-Print Network (OSTI)

The spontaneous relaxation rates for an atom in free space and close to an absorbing surface are calculated to various orders of the electromagnetic multipole expansion. The spontaneous decay rates for dipole, quadrupole and octupole transitions are calculated in terms of their respective primitive electric multipole moments and the magnetic relaxation rate is calculated for the dipole and quadrupole transitions in terms of their respective primitive magnetic multipole moments. The theory of electromagnetic field quantization in magnetoelectric materials is used to derive general expressions for the decay rates in terms of the dyadic Green function. We focus on the decay rates in free space and near an infinite half space. For the decay of atoms near to an absorbing dielectric surface we find a hierarchy of scaling laws depending on the atom-surface distance z.

Crosse, J A

2009-01-01T23:59:59.000Z

369

Atomic multipole relaxation rates near surfaces  

E-Print Network (OSTI)

The spontaneous relaxation rates for an atom in free space and close to an absorbing surface are calculated to various orders of the electromagnetic multipole expansion. The spontaneous decay rates for dipole, quadrupole and octupole transitions are calculated in terms of their respective primitive electric multipole moments and the magnetic relaxation rate is calculated for the dipole and quadrupole transitions in terms of their respective primitive magnetic multipole moments. The theory of electromagnetic field quantization in magnetoelectric materials is used to derive general expressions for the decay rates in terms of the dyadic Green function. We focus on the decay rates in free space and near an infinite half space. For the decay of atoms near to an absorbing dielectric surface we find a hierarchy of scaling laws depending on the atom-surface distance z.

J. A. Crosse; Stefan Scheel

2009-01-20T23:59:59.000Z

370

FUNDAMENTAL STUDY OF THE ATOMIC BATTERY  

SciTech Connect

Electron-voltaic effects in diffased p-n junctions of Ge were obtained by diffusing As at 210 deg C in 10/sup -5/ Hg vacuum on a p-type Ge, doped with In, of 3 OMEGA /cm resistivity. A thin Au wire was attached to the surface of this junction by soldering. The p-n junction was irradiated with a 50mc Sr/sup 90/-Y/sup 90/ source, and the electron-voltaic effect was measured from room temperature down to -78 deg C. The general condition of an atomic battery was similar to that of a solar battery except that the atomic battery offers the possibility of current multiplication but presents the problem of radiation damage in the crystal lattice. At room temperature no radiation damage was observed. The junction and radiation damage of a Si-based atomic battery was also studied. (OID)

Yamanaka, C.; Wada, H.; Yamamura, Y.

1958-10-01T23:59:59.000Z

371

Atomic physics of strongly correlated systems  

DOE Green Energy (OSTI)

This report presents the progress made in our continuing study of strongly correlated atomic systems within the last year. We have examined the shape of three-body systems in hyperspherical coordinates by studying the evolution of the density functions with the mass ratio of the particles in the system. We have calculated the ejected electron spectra from the autoionizing states formed in double capture processes in collisions of multiply charged ions with atoms. We have investigated the systematics and the propensity rules of radiative and Auger decay rates of high-lying doubly excited states. We have also studied ion-atom collisions for processes which pose great challenges to detailed theories, by looking into processes where the cross sections are small such as the excitation process in He{sup ++} + H collisions, or by looking into fine details such as the orientation parameters in excitation and charge transfer processes.

Lin, Chii-Dong.

1992-01-01T23:59:59.000Z

372

Kaonic Atom X?ray Spectra  

Science Conference Proceedings (OSTI)

In kaonic atoms energy displacement and broadening of states result from the strong interaction. The most simple kaonic atoms like kaonic hydrogen and deuterium open the possibility to measure this strong interaction induced shift and width by x?ray spectroscopy. In the SIDDHARTA experiment al LNF (Frascati) the DA?NE electron?positron collider delivers nearly mono?energetic negatively charged kaons from ? meson decay. This unique kaon source is used to form kaonic atoms. New high performance x?ray detectors (silicon drift detectors) arranged in an array allow x?ray spectroscopy with high energy resolution combined with timing capability. High precision x?ray measurements like SIDDHARTA at LNF will open the way to study the low energy regime of the strong force in the antikaon?nucleon interaction. The experiment and its current status is presented in this talk.

J. Marton; on behalf of the SIDDHARTA Collaboration

2009-01-01T23:59:59.000Z

373

Wired World-Wide Web Interactive Remote Event Display  

Science Conference Proceedings (OSTI)

WIRED (World-Wide Web Interactive Remote Event Display) is a framework, written in the Java{trademark} language, for building High Energy Physics event displays. An event display based on the WIRED framework enables users of a HEP collaboration to visualize and analyze events remotely using ordinary WWW browsers, on any type of machine. In addition, event displays using WIRED may provide the general public with access to the research of high energy physics. The recent introduction of the object-oriented Java{trademark} language enables the transfer of machine independent code across the Internet, to be safely executed by a Java enhanced WWW browser. We have employed this technology to create a remote event display in WWW. The combined Java-WWW technology hence assures a world wide availability of such an event display, an always up-to-date program and a platform independent implementation, which is easy to use and to install.

De Groot, Nicolo

2003-05-07T23:59:59.000Z

374

Atomic-level imaging, processing and characterization of semiconductor surfaces  

DOE Patents (OSTI)

A method for selecting and removing single specific atoms from a solid material surface uses photon biasing to break down bonds that hold the selected atom in the lattice and to reduce barrier effects that hold the atom from transferring to a probe. The photon bias is preferably light or other electromagnetic radiation with a wavelength and frequency that approximately matches the wave function of the target atom species to be removed to induce high energy, selective thermionic-like vibration. An electric field potential is then applied between the probe and the surface of the solid material to pull the atom out of the lattice and to transfer the atom to the probe. Different extrinsic atoms can be installed in the lattice sites that are vacated by the removed atoms by using a photon bias that resonates the extrinsic atom species, reversing polarity of the electric field, and blowing gas comprising the extrinsic atoms through a hollow catheter probe.

Kazmerski, Lawrence L. (Lakewood, CO)

1995-01-01T23:59:59.000Z

375

Atomic-level imaging, processing and characterization of semiconductor surfaces  

DOE Patents (OSTI)

A method for selecting and removing single specific atoms from a solid material surface uses photon biasing to break down bonds that hold the selected atom in the lattice and to reduce barrier effects that hold the atom from transferring to a probe. The photon bias is preferably light or other electromagnetic radiation with a wavelength and frequency that approximately matches the wave function of the target atom species to be removed to induce high energy, selective thermionic-like vibration. An electric field potential is then applied between the probe and the surface of the solid material to pull the atom out of the lattice and to transfer the atom to the probe. Different extrinsic atoms can be installed in the lattice sites that are vacated by the removed atoms by using a photon bias that resonates the extrinsic atom species, reversing polarity of the electric field, and blowing gas comprising the extrinsic atoms through a hollow catheter probe. 8 figs.

Kazmerski, L.L.

1995-08-22T23:59:59.000Z

376

Isolating and moving single atoms using silicon nanocrystals  

DOE Patents (OSTI)

A method is disclosed for isolating single atoms of an atomic species of interest by locating the atoms within silicon nanocrystals. This can be done by implanting, on the average, a single atom of the atomic species of interest into each nanocrystal, and then measuring an electrical charge distribution on the nanocrystals with scanning capacitance microscopy (SCM) or electrostatic force microscopy (EFM) to identify and select those nanocrystals having exactly one atom of the atomic species of interest therein. The nanocrystals with the single atom of the atomic species of interest therein can be sorted and moved using an atomic force microscope (AFM) tip. The method is useful for forming nanoscale electronic and optical devices including quantum computers and single-photon light sources.

Carroll, Malcolm S. (Albuquerque, NM)

2010-09-07T23:59:59.000Z

377

Supplement Analysis of the 2005 Site-Wide EIS  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

U.S. Department of Energy U.S. Department of Energy National Nuclear Security Administration Livermore Site Office Livermore, California SUPPLEMENT ANALYSIS of the 2005 Final Site-wide Environmental Impact Statement For Continued Operation of Lawrence Livermore National Laboratory Volume I: Main Report AUGUST 2011 DOE/EIS-0348-SA-03 i CONTENTS NOTATION.............................................................................................................................. v SUMMARY...........................................................................................................................S-1 1.0 INTRODUCTION ......................................................................................................... 1-1 1.1 Purpose and Need............................................................................................

378

Industry-Wide Transformer Database: Key Findings and Case Studies  

Science Conference Proceedings (OSTI)

This report summarizes the development and application of the Electric Power Research Institutes (EPRIs) Industry-Wide Database (IDB) for power transformers. The IDB is a repository of detailed transformer performance data. Analysis of these data can provide information about the past performance of power transformers and the factors that influence that performance. With enough data, projections can be made about future performance, such as expected service life. Both past and ...

2013-12-19T23:59:59.000Z

379

Economic Impacts of a Wide Area Release of Anthrax  

SciTech Connect

This analysis explores economic impacts that might result from a wide-area release of anthrax. The intent is not to provide a quantitative analysis of such a disaster, but to: 1. Define the general categories of economic impacts that the region should be concerned about; and, 2. Explore what types of private sector businesses or industries, if any, may have the greatest impact on speeding the economic recovery of the region.

Judd, Kathleen S.; Olson, Jarrod; Stein, Steven L.; Lesperance, Ann M.

2009-05-29T23:59:59.000Z

380

Martinez Refinery Completes Plant-Wide Energy Assessment  

SciTech Connect

This OIT BestPractices Case Study describes how the Equilon Enterprises oil refinery in Martinez, California undertook a plant-wide energy assessment that focused on three key areas: waste minimization, process debottlenecking, and operations optimization. The assessment yielded recommendations, which, if implemented, can save more than 6,000,000 MMBtu per year and an estimated $52,000,000 per year, plus improve process control and reduce waste.

Not Available

2002-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Equipment Reliability Site-Wide Training v1.0  

Science Conference Proceedings (OSTI)

The Equipment Reliability Site-Wide Training is a computer based training module that allows users to access training when desired and review it at their own pace. It provides graphics and interactive features to enhance learning. This training will support EPRInuclear utility members by raising awareness of personnel in various organizations as to their roles and responsibilities related to equipment reliability and focus attention on critical components and single point vulnerabilities within nuclear p...

2011-06-22T23:59:59.000Z

382

A Cosmology Calculator for the World Wide Web  

E-Print Network (OSTI)

A cosmology calculator that computes times and distances as a function of redshift for user-defined cosmological parameters is available on the World Wide Web. This note gives the formulae used by the cosmology calculator and discusses some of its implementation. A version of the calculator that allows one to specify the equation of state parameter w and w' and neutrino masses, and a version for converting the light travel times usually given in the popular press into redshifts are also available.

Edward L. Wright

2006-09-20T23:59:59.000Z

383

Feedback Cooling of a Single Neutral Atom  

E-Print Network (OSTI)

We demonstrate feedback cooling of the motion of a single rubidium atom trapped in a high-finesse optical resonator to a temperature of about 160 \\mu K. Time-dependent transmission and intensity-correlation measurements prove the reduction of the atomic position uncertainty. The feedback increases the 1/e storage time into the one second regime, 30 times longer than without feedback. Feedback cooling therefore rivals state-of-the-art laser cooling, but with the advantages that it requires less optical access and exhibits less optical pumping.

Markus Koch; Christian Sames; Alexander Kubanek; Matthias Apel; Maximilian Balbach; Alexei Ourjoumtsev; Pepijn W. H. Pinkse; Gerhard Rempe

2010-07-12T23:59:59.000Z

384

Feedback Cooling of a Single Neutral Atom  

E-Print Network (OSTI)

We demonstrate feedback cooling of the motion of a single rubidium atom trapped in a high-finesse optical resonator to a temperature of about 160 \\mu K. Time-dependent transmission and intensity-correlation measurements prove the reduction of the atomic position uncertainty. The feedback increases the 1/e storage time into the one second regime, 30 times longer than without feedback. Feedback cooling therefore rivals state-of-the-art laser cooling, but with the advantages that it requires less optical access and exhibits less optical pumping.

Koch, Markus; Kubanek, Alexander; Apel, Matthias; Balbach, Maximilian; Ourjoumtsev, Alexei; Pinkse, Pepijn W H; Rempe, Gerhard

2010-01-01T23:59:59.000Z

385

Cavity Loss Induced Generation of Entangled Atoms  

E-Print Network (OSTI)

We discuss the generation of entangled states of two two-level atoms inside an optical resonator. When the cavity decay is continuously monitored, the absence of photon-counts is associated with the presence of an atomic entangled state. In addition to being conceptually simple, this scheme could be demonstrated with presently available technology. We describe how such a state is generated through conditional dynamics, using quantum jump methods, including both cavity damping and spontaneous emission decay, and evaluate the fidelity and relative entropy of entanglement of the generated state compared with the target entangled state.

M. B. Plenio; S. F. Huelga; A. Beige; P. L. Knight

1998-11-02T23:59:59.000Z

386

Cavity Loss Induced Generation of Entangled Atoms  

E-Print Network (OSTI)

We discuss the generation of entangled states of two two-level atoms inside an optical resonator. When the cavity decay is continuously monitored, the absence of photon-counts is associated with the presence of an atomic entangled state. In addition to being conceptually simple, this scheme could be demonstrated with presently available technology. We describe how such a state is generated through conditional dynamics, using quantum jump methods, including both cavity damping and spontaneous emission decay, and evaluate the fidelity and relative entropy of entanglement of the generated state compared with the target entangled state.

Plenio, M B; Beige, A; Knight, P L

1999-01-01T23:59:59.000Z

387

Nuclear medium effects from hadronic atoms  

E-Print Network (OSTI)

The state of the art in the study of pionic, kaonic and Sigmionic atoms, along with the in-medium nuclear interactions deduced for these hadrons, is reviewed. A special emphasis is placed on recent developments in antikaon-nuclear physics, where a strongly attractive density dependent antikaon-nuclear potential of order 150-200 MeV in nuclear matter emerges by fitting K^- atom data. This has interesting repercussions on antikaon quasibound nuclear states, on the composition of strange hadronic matter and on kaon condensation in self bound hadronic systems.

Friedman, E

2011-01-01T23:59:59.000Z

388

Evaluation of GaN substrates grown in supercritical basic ammonia  

SciTech Connect

GaN crystals grown by the basic ammonothermal method were investigated for their use as substrates for device regrowth. X-ray diffraction analysis indicated that the substrates contained multiple grains while secondary ion mass spectroscopy (SIMS) revealed a high concentration of hydrogen, oxygen, and sodium. Despite these drawbacks, the emission from the light emitting diode structures grown by metal organic chemical vapor deposition on both the c-plane and m-plane epitaxial wafers was demonstrated. The SIMS depth profiles showed that the diffusion of the alkali metal from the substrate into the epitaxial film was small, especially in the m-direction.

Saito, Makoto; Yamada, Hisashi; Iso, Kenji; Sato, Hitoshi; Hirasawa, Hirohiko; Kamber, Derrick S.; Hashimoto, Tadao; Baars, Steven P. den; Speck, James S.; Nakamura, Shuji [Materials Department, University of California, Santa Barbara, California 93106 (United States)

2009-02-02T23:59:59.000Z

389

Wide-area situation awareness in electric power grid  

Science Conference Proceedings (OSTI)

Two primary elements of the US energy policy are demand management and efficiency and renewable sources. Major objectives are clean energy transmission and integration, reliable energy transmission, and grid cyber security. Development of the Smart Grid seeks to achieve these goals by lowering energy costs for consumers, achieving energy independence and reducing greenhouse gas emissions. The Smart Grid is expected to enable real time wide-area situation awareness (SA) for operators. Requirements for wide-area SA have been identified among interoperability standards proposed by the Federal Energy Regulatory Commission and the National Institute of Standards and Technology to ensure smart-grid functionality. Wide-area SA and enhanced decision support and visualization tools are key elements in the transformation to the Smart Grid. This paper discusses human factors research to promote SA in the electric power grid and the Smart Grid. Topics that will be discussed include the role of human factors in meeting US energy policy goals, the impact and challenges for Smart Grid development, and cyber security challenges.

Greitzer, Frank L.

2010-04-28T23:59:59.000Z

390

Atomic-scale structural analyses of epitaxial Co/Re superlattices  

Science Conference Proceedings (OSTI)

High-resolution transmission electron microscopy and scanning transmission electron microscopy (STEM) have been used to investigate atomic-scale structural properties of Co/Re trilayers and superlattices grown via magnetron sputtering. The sample growth was epitaxial with the (1010) plane of Co and Re parallel to the (1120) plane of Al{sub 2}O{sub 3}, and the [001] direction of Re and Co coinciding with that of the Al{sub 2}O{sub 3}. Both low-angle and high-angle Z-contrast STEM images show a very uniform layer thickness. However, the interface roughness between the Re and Co layers monotonically increases with interface distance from the substrate. These results strongly imply that, in the epitaxial Re/Co superlattice system, interface roughness plays a more important role in the giant magnetoresistance effect than thickness fluctuations of the spacer layer. Previous anisotropic magnetoresistance measurements can be explained in terms of the observed atomic-scale structure.

Xu Wentao; De Long, Lance E.; Charlton, Timothy; Chisholm, Matthew; Lederman, David [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States); Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Oak Ridge National Laboratory, P. O. Box 2008, MS6030-Oak Ridge, Tennessee 37831 (United States); Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States)

2004-11-01T23:59:59.000Z

391

Equipment Reliability Site-Wide Training - Korean Release (ER Site-Wide Training - Korean Release) 1.0  

Science Conference Proceedings (OSTI)

Equipment Reliability Site-Wide Training is a computer based training module that allows users to access training when desired and review it at their own pace. It provides graphics and interactive features to enhance learning. This training will support EPRInuclear utility members by raising awareness of personnel in various organizations as to their roles and responsibilities related to equipment reliability and focus attention on critical components and single point vulnerabilities within nuclear power...

2011-12-05T23:59:59.000Z

392

Atomic power in space: A history  

Science Conference Proceedings (OSTI)

''Atomic Power in Space,'' a history of the Space Isotope Power Program of the United States, covers the period from the program's inception in the mid-1950s through 1982. Written in non-technical language, the history is addressed to both the general public and those more specialized in nuclear and space technologies. 19 figs., 3 tabs.

Not Available

1987-03-01T23:59:59.000Z

393

Moller Polarimetry with Atomic Hydrogen Targets  

DOE Green Energy (OSTI)

A novel proposal of using polarized atomic hydrogen gas, stored in an ultra-cold magnetic trap, as the target for electron beam polarimetry based on Moller scattering is discussed. Such a target of practically 100% polarized electrons could provide a superb systematic accuracy of about 0.5% for beam polarization measurements. The feasibility studies for the CEBAF electron beam have been performed.

Eugene Chudakov; Vladimir Luppov

2003-10-19T23:59:59.000Z

394

Atomic physics with highly charged ions  

SciTech Connect

This report discusses: One electron outer shell processes in fast ion-atom collisions; role of electron-electron interaction in two-electron processes; multi-electron processes at low energy; multi-electron processes at high energy; inner shell processes; molecular fragmentation studies; theory; and, JRM laboratory operations.

Richard, P.

1991-08-01T23:59:59.000Z

395

Atomic clocks with suppressed blackbody radiation shift  

E-Print Network (OSTI)

We develop a nonstandard concept of atomic clocks where the blackbody radiation shift (BBRS) and its temperature fluctuations can be dramatically suppressed (by one to three orders of magnitude) independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies $\

Yudin, V I; Okhapkin, M V; Bagayev, S N; Tamm, Chr; Peik, E; Huntemann, N; Mehlstaubler, T E; Riehle, F

2011-01-01T23:59:59.000Z

396

The New Element Curium (Atomic Number 96)  

DOE R&D Accomplishments (OSTI)

Two isotopes of the element with atomic number 96 have been produced by the helium-ion bombardment of plutonium. The name curium, symbol Cm, is proposed for element 96. The chemical experiments indicate that the most stable oxidation state of curium is the III state.

Seaborg, G. T.; James, R. A.; Ghiorso, A.

1948-00-00T23:59:59.000Z

397

Nano-soldering to single atomic layer  

DOE Patents (OSTI)

A simple technique to solder submicron sized, ohmic contacts to nanostructures has been disclosed. The technique has several advantages over standard electron beam lithography methods, which are complex, costly, and can contaminate samples. To demonstrate the soldering technique graphene, a single atomic layer of carbon, has been contacted, and low- and high-field electronic transport properties have been measured.

Girit, Caglar O. (Berkeley, CA); Zettl, Alexander K. (Kensington, CA)

2011-10-11T23:59:59.000Z

398

Entangling strings of neutral atoms in 1D atomic pipeline structures  

E-Print Network (OSTI)

We study a string of neutral atoms with nearest neighbor interaction in a 1D beam splitter configuration, where the longitudinal motion is controlled by a moving optical lattice potential. The dynamics of the atoms crossing the beam splitter maps to a 1D spin model with controllable time dependent parameters, which allows the creation of maximally entangled states of atoms by crossing a quantum phase transition. Furthermore, we show that this system realizes protected quantum memory, and we discuss the implementation of one- and two-qubit gates in this setup.

U. Dorner; P. Fedichev; D. Jaksch; M. Lewenstein; P. Zoller

2002-12-06T23:59:59.000Z

399

Molecular Beam Studies of Hot Atom Chemical Reactions: Reactive Scattering of Energetic Deuterium Atoms  

DOE R&D Accomplishments (OSTI)

A brief review of the application of the crossed molecular beams technique to the study of hot atom chemical reactions in the last twenty years is given. Specific emphasis is placed on recent advances in the use of photolytically produced energetic deuterium atoms in the study of the fundamental elementary reactions D + H{sub 2} -> DH + H and the substitution reaction D + C{sub 2}H{sub 2} -> C{sub 2}HD + H. Recent advances in uv laser and pulsed molecular beam techniques have made the detailed study of hydrogen atom reactions under single collision conditions possible.

Continetti, R. E.; Balko, B. A.; Lee, Y. T.

1989-02-00T23:59:59.000Z

400

Molecular beam studies of hot atom chemical reactions: Reactive scattering of energetic deuterium atoms  

DOE Green Energy (OSTI)

A brief review of the application of the crossed molecular beams technique to the study of hot atom chemical reactions in the last twenty years is given. Specific emphasis is placed on recent advances in the use of photolytically produced energetic deuterium atoms in the study of the fundamental elementary reactions D + H/sub 2/ /minus/> DH + H and the substitution reaction D + C/sub 2/H/sub 2/ /minus/> C/sub 2/HD + H. Recent advances in uv laser and pulsed molecular beam techniques have made the detailed study of hydrogen atom reactions under single collision conditions possible. 18 refs., 9 figs.

Continetti, R.E.; Balko, B.A.; Lee, Y.T.

1989-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Solution-Grown Silicon Nanowires for Lithium-Ion Battery Anodes  

E-Print Network (OSTI)

that lower- ing the price of batteries is a major goal, the cost of the processing and fabricationSolution-Grown Silicon Nanowires for Lithium-Ion Battery Anodes Candace K. Chan, Reken N. Patel interest in using nanomaterials for advanced lithium-ion battery electrodes, par- ticularly for increasing

Cui, Yi

402

Layer Number Determination and Thickness-Dependent Properties of Graphene Grown on SiC  

Science Conference Proceedings (OSTI)

The electronic properties of few-layer graphene grown on the carbon face of silicon carbide (SiC) are found to be strongly dependent on the number of layers. The carrier mobility is larger in thicker graphene because substrate-related scattering is reduced ...

Wenjuan Zhu; Christos Dimitrakopoulos; Marcus Freitag; Phaedon Avouris

2011-09-01T23:59:59.000Z

403

Development of Autonomous Magnetometer Rotorcraft For Wide Area Assessment  

SciTech Connect

Large areas across the United States and internationally are potentially contaminated with unexploded ordinance (UXO), with some ranges encompassing tens to hundreds of thousands of acres. Technologies are needed which will allow for cost effective wide area scanning with (1) near 100% coverage and (2) near 100% detection of subsurface ordnance or features indicative of subsurface ordnance. The current approach to wide area assessment is a multi-level one, in which medium - altitude fixed wing optical imaging is used for an initial site assessment. This assessment is followed with low altitude manned helicopter based magnetometry. Subsequent to this wide area assessment targeted surface investigations are performed using either towed geophysical sensor arrays or man portable sensors. In order to be an effective tool for small UXO detection, the sensing altitude for magnetic site investigations needs to be on the order of 1 to 3 meters. These altitude requirements mean that manned helicopter surveys will generally only be feasible in large, open and relatively flat terrains. While such surveys are effective in mapping large areas relatively fast there are substantial mobilization/demobilization, staffing and equipment costs associated with these surveys, resulting in costs of approximately $100-$150/acre. In addition, due to the low altitude there are substantial risks to pilots and equipment. Surface towed arrays provide highresolution maps but have other limitations, e.g. in their ability to navigate rough terrain effectively. Thus there is a need for other systems, which can be used for effective data collection. An Unmanned Aerial Vehicle (UAV) magnetometer platform is an obvious alternative. The motivation behind such a system is that it reduces risk to operators, is lower in initial and Operational and Maintenance (O&M) costs (and can thus potentially be applied to smaller sites) and has the potential of being more effective in terms of detection and possibly characterization (through the use of dynamic acquisition, i.e. survey mission in-flight reprioritization).

Mark D. McKay; Matthew O. Anderson

2011-08-01T23:59:59.000Z

404

Manhattan Project: Exploring the Atom, 1919-1932  

Office of Scientific and Technical Information (OSTI)

Ernest Rutherford (and James Chadwick, on the far right) EXPLORING THE ATOM Ernest Rutherford (and James Chadwick, on the far right) EXPLORING THE ATOM (1919-1932) Events > Atomic Discoveries, 1890s-1939 A Miniature Solar System, 1890s-1919 Exploring the Atom, 1919-1932 Atomic Bombardment, 1932-1938 The Discovery of Fission, 1938-1939 Fission Comes to America, 1939 The road to the atomic bomb began in earnest in 1919 with the first artificial transmutation of an element. The New Zealander Ernest Rutherford, working in the Cavendish Laboratory at Cambridge University in England, changed several atoms of nitrogen into oxygen. The final addition to the atomic "miniature solar system" first proposed by Niels Bohr came in 1932 when James Chadwick, Rutherford's colleague at Cambridge, identified the third and final basic particle of the atom: the neutron.

405

Amplifier circuit operable over a wide temperature range  

DOE Patents (OSTI)

An amplifier circuit having stable performance characteristics over a wide temperature range from approximately 0.degree. C up to as high as approximately 500.degree. C, such as might be encountered in a geothermal borehole. The amplifier utilizes ceramic vacuum tubes connected in directly coupled differential amplifier pairs having a common power supply and a cathode follower output stage. In an alternate embodiment, for operation up to 500.degree. C, positive and negative power supplies are utilized to provide improved gain characteristics, and all electrical connections are made by welding. Resistor elements in this version of the invention are specially heat treated to improve their stability with temperature.

Kelly, Ronald D. (San Pedro, CA); Cannon, William L. (Encino, CA)

1979-01-01T23:59:59.000Z

406

Fleet-wide Prognostics and Health Management Applications Research  

Science Conference Proceedings (OSTI)

The Fleet-Wide Prognostic and Health Management (FW-PHM) Suite of software is a multi-user, web-based software application that users access from their desktop computer through a standard web browser, such as Internet Explorer 7 or above. The installed FW-PHM Suite is a three-tiered collection of web sites, web services and Oracle databases. The web sites provide the user interface. The Oracle databases contain the information needed by the software to perform the asset prognostic and health ...

2012-12-31T23:59:59.000Z

407

Atomic Imaging Using Secondary Electrons in a Scanning Transmission Electron Microscope: Experimental Observations and Possible Mechanisms  

SciTech Connect

We report detailed investigation of high-resolution imaging using secondaryelectrons (SE) with a sub-nanometer probe in an aberration-corrected transmissionelectron microscope, Hitachi HD2700C. This instrument also allows us to acquire the corresponding annular dark-field (ADF) images both simultaneously and separately. We demonstrate that atomic SE imaging is achievable for a wide range of elements, from uranium to carbon. Using the ADF images as a reference, we studied the SE image intensity and contrast as functions of applied bias, atomic number, crystal tilt, and thickness to shed light on the origin of the unexpected ultrahigh resolution in SE imaging. We have also demonstrated that the SE signal is sensitive to the terminating species at a crystal surface. Apossiblemechanism for atomic-scale SE imaging is proposed. The ability to image both the surface and bulk of a sample at atomic-scale is unprecedented, and can have important applications in the field of electron microscopy and materials characterization.

Su, D.; Inada, H.; Egerton, R.F.; Konno, M.; Wua, L.; Ciston, J.; Wall, J.; Zhu, Y.

2011-11-11T23:59:59.000Z

408

Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond  

E-Print Network (OSTI)

Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within and beyond the Standard Model (BSM). The interpretation of experimental EDM limits requires careful delineation of physics at a wide range of distance scales, from the long-range atomic and molecular scales to the short-distance dynamics of physics at or beyond the Fermi scale. In this review, we provide a framework for disentangling contributions from physics at these disparate scales, building out from the set of dimension four and six effective operators that embody CP violation at the Fermi scale. We survey existing computations of hadronic and nuclear matrix elements associated with Fermi-scale CP violation in systems of experimental interest, and quantify the present level of theoretical uncertainty in these calculations. Using representative BSM scenarios of current interest, we illustrate how the interplay of physics at various scales generates EDMs at a potentially observable level.

Jonathan Engel; Michael J. Ramsey-Musolf; U. van Kolck

2013-03-10T23:59:59.000Z

409

Implementation of exterior complex scaling in B-splines to solve atomic and molecular collision problems  

SciTech Connect

B-spline methods are now well established as widely applicable tools for the evaluation of atomic and molecular continuum states. The mathematical technique of exterior complex scaling has been shown, in a variety of other implementations, to be a powerful method with which to solve atomic and molecular scattering problems, because it allows the correct imposition of continuum boundary conditions without their explicit analytic application. In this paper, an implementation of exterior complex scaling in B-splines is described that can bring the well-developed technology of B-splines to bear on new problems, including multiple ionization and breakup problems, in a straightforward way. The approach is demonstrated for examples involving the continuum motion of nuclei in diatomic molecules as well as electronic continua. For problems involving electrons, a method based on Poisson's equation is presented for computing two-electron integrals over B-splines under exterior complex scaling.

McCurdy, C. William; Martin, Fernando

2003-11-18T23:59:59.000Z

410

Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond  

E-Print Network (OSTI)

Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within and beyond the Standard Model (BSM). The interpretation of experimental EDM limits requires careful delineation of physics at a wide range of distance scales, from the long-range atomic and molecular scales to the short-distance dynamics of physics at or beyond the Fermi scale. In this review, we provide a framework for disentangling contributions from physics at these disparate scales, building out from the set of dimension four and six effective operators that embody CP violation at the Fermi scale. We survey existing computations of hadronic and nuclear matrix elements associated with Fermi-scale CP violation in systems of experimental interest, and quantify the present level of theoretical uncertainty in these calculations. Using representative BSM scenarios of current interest, we illustrate how the interplay of physics at various scales generates EDMs at ...

Engel, Jonathan; van Kolck, U

2013-01-01T23:59:59.000Z

411

Implementation of exterior complex scaling in B-splines to solve atomic and molecular collision problems  

SciTech Connect

B-spline methods are now well established as widely applicable tools for the evaluation of atomic and molecular continuum states. The mathematical technique of exterior complex scaling has been shown, in a variety of other implementations, to be a powerful method with which to solve atomic and molecular scattering problems, because it allows the correct imposition of continuum boundary conditions without their explicit analytic application. In this paper, an implementation of exterior complex scaling in B-splines is described that can bring the well-developed technology of B-splines to bear on new problems, including multiple ionization and breakup problems, in a straightforward way. The approach is demonstrated for examples involving the continuum motion of nuclei in diatomic molecules as well as electronic continua. For problems involving electrons, a method based on Poisson's equation is presented for computing two-electron integrals over B-splines under exterior complex scaling.

McCurdy, C. William; Martin, Fernando

2003-11-18T23:59:59.000Z

412

Remote Energetic Neutral Atom Imaging of Electric Potential Over a Lunar Magnetic Anomaly  

E-Print Network (OSTI)

The formation of electric potential over lunar magnetized regions is essential for understanding fundamental lunar science, for understanding the lunar environment, and for planning human exploration on the Moon. A large positive electric potential was predicted and detected from single point measurements. Here, we demonstrate a remote imaging technique of electric potential mapping at the lunar surface, making use of a new concept involving hydrogen neutral atoms derived from solar wind. We apply the technique to a lunar magnetized region using an existing dataset of the neutral atom energy spectrometer SARA/CENA on Chandrayaan-1. Electrostatic potential larger than +135 V inside the Gerasimovic anomaly is confirmed. This structure is found spreading all over the magnetized region. The widely spread electric potential can influence the local plasma and dust environment near the magnetic anomaly.

Futaana, Y; Wieser, M; Lue, C; Wurz, P; Vorburger, A; Bhardwaj, A; Asamura, K; 10.1002/grl.50135

2013-01-01T23:59:59.000Z

413

Quantization of Differences Between Atomic and Nuclear Rest Masses and Selforganization of Atoms and Nuclei  

E-Print Network (OSTI)

We come to the conclusion that all atomic models based on either the Newton equation and the Kepler laws, or the Maxwell equations, or the Schrodinger and Dirac equations are in reasonable agreement with experimental data. We can only suspect that these equations are grounded on the same fundamental principle(s) which is (are) not known or these equations can be transformed into each other. We proposed a new mechanism of LENR: cooperative processes in the whole system - nuclei+atoms+condensed matter - nuclear reactions in plasma - can occur at smaller threshold energies than the corresponding ones on free constituents. We were able to quantize phenomenologically the first time the differences between atomic and nuclear rest masses by the formula (in MeV/$c^{2}$) $\\Delta M=\\frac{n_{1}}{n_{2}}*0.0076294, n_{i}=1,2,3,...$ Note that this quantization rule is justified for atoms and nuclei with different $A, N$ and $Z$ and the nuclei and atoms represent a coherent synchronized systems - a complex of coupled oscillators (resonators). The cooperative resonance synchronization mechanisms are responsible for explanation of how the electron volt world can influence the nuclear mega electron volt world. It means that we created new possibilities for inducing and controlling nuclear reactions by atomic processes.

F. A. Gareev; I. E. Zhidkova

2006-09-30T23:59:59.000Z

414

Distribution Category: Atomic, Molecular, and Chemical Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

Atomic, Atomic, Molecular, and Chemical Physics (UC-411) ARGONNE NATIONAL LABORATORY 9700 South Cass Avenue Argonne, TIlinois 60439 ANLI APSILS-151 RESULTS OF DESIGN CALCULATIONS FOR THE MODULATOR OF THE CROSSED FIELD UNDULATOR DEVICE by Roland S8:voy Advanced Photon Source August 1990 Work sponsored by ~--~,P:a7te~n7t~C~le-.a-re-d--b\-!------ Pen"" .... + D - CII, epartrnent, AND R':-lr-!, ("'1:' ' "'"",,, l... ,r:.. ,'\')k. . f\UTHOF?IZED BY 1l;J6r1l11Cal Publications Ser " O(;ite~ ~ 'vjces Technicallnf ~avld R .* ·i;;~rln - ormatIon Services, ANL Uo So DEPARTMENT OF ENERGY Office of Energy Research 1 Abstract: The modulator in the crossed field undulator device is used to shift the

415

Dosimetry of the Atomic Bomb Survivors  

Science Conference Proceedings (OSTI)

A brief account of the presentations and discussions at the Late Effects Workshop on Dosimetry of the Atomic Bomb Survivors held in conjunction with the 29th Annual Meeting of the Radiation Reserch Society in Minneapolis, MN, on May 32, 1981 is presented. The following five papers are briefly reviewed: 1)Radiobiological significance of the Hiroshima/Nagasaki data by V.P. Bond; 2)Revised Dose Estimates at Hiroshima and Nagasaki, by W.E. Loewe; 3)Review of dosimetry for the Japanese atomic bomb survivors by G.D. Kerr; 4)Ichiban: numberoriginal studies, by J. Auxier; and 5)NCRP's involvement in the Hiroshima and Nagasaki Dosimetry, by H.O. Wyckoff. (JMT)

Sinclair, W.K. (National Council on Radiation Protection and Measurements, Washington, DC); Failla, P.

1981-12-01T23:59:59.000Z

416

Atomic Polarization and the Hanle Effect  

E-Print Network (OSTI)

This article presents an introduction to optical pumping, atomic polarization and the Hanle effect in weakly magnetized stellar atmospheres. Although the physical processes and the theoretical framework described here are of interest for applications in a variety of astrophysical contexts (e.g. scattering polarization in circumstellar envelopes and polarization in astronomical masers), the article focuses mainly on the quest for understanding the physical origin of the linearly polarized solar limb spectrum. It considers also the development of the Hanle effect as a reliable diagnostic tool for making feasible new advances in solar photospheric and chromospheric magnetism. Particular emphasis is given to a rigorous modeling of polarization phenomena as the essential link between theory and observations. Some of the most recent advances in this field are presented after carefully explaining how the various radiation pumping mechanisms lead to atomic polarization in the absence and in the presence of weak magnetic fields.

Javier Trujillo-Bueno

2002-02-18T23:59:59.000Z

417

Hydrogen atom in Palatini theories of gravity  

E-Print Network (OSTI)

We study the effects that the gravitational interaction of $f(R)$ theories of gravity in Palatini formalism has on the stationary states of the Hydrogen atom. We show that the role of gravity in this system is very important for lagrangians $f(R)$ with terms that grow at low curvatures, which have been proposed to explain the accelerated expansion rate of the universe. We find that new gravitationally induced terms in the atomic Hamiltonian generate a strong backreaction that is incompatible with the very existence of bound states. In fact, in the 1/R model, Hydrogen disintegrates in less than two hours. The universe that we observe is, therefore, incompatible with that kind of gravitational interaction. Lagrangians with high curvature corrections do not lead to such instabilities.

Gonzalo J. Olmo

2008-02-27T23:59:59.000Z

418

Trapping Rydberg Atoms in an Optical Lattice  

Science Conference Proceedings (OSTI)

Rubidium Rydberg atoms are laser excited and subsequently trapped in a one-dimensional optical lattice (wavelength 1064 nm). Efficient trapping is achieved by a lattice inversion immediately after laser excitation using an electro-optic technique. The trapping efficiency is probed via analysis of the trap-induced shift of the two-photon microwave transition 50S{yields}51S. The inversion technique allows us to reach a trapping efficiency of 90%. The dependence of the efficiency on the timing of the lattice inversion and on the trap laser power is studied. The dwell time of 50D{sub 5/2} Rydberg atoms in the lattice is analyzed using lattice-induced photoionization.

Anderson, S. E.; Younge, K. C.; Raithel, G. [FOCUS Center, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2011-12-23T23:59:59.000Z

419

Moller Polarimetry with Atomic Hydrogen Targets  

Science Conference Proceedings (OSTI)

A proposal to use polarized atomic hydrogen gas as the target for electron beam polarimetry based on the Moller scattering is described. Such a gas, stored in an ultra-cold magnetic trap, would provide a target of practically 100\\% polarized electrons. It is conceivable to reach a $\\sim$0.3\\% systematic accuracy of the beam polarimetry with such a target. Feasibility studies for the CEBAF electron beam have been performed.

Eugene Chudakov

2012-06-01T23:59:59.000Z

420

Atomization methods for forming magnet powders  

SciTech Connect

The invention encompasses methods of utilizing atomization, methods for forming magnet powders, methods for forming magnets, and methods for forming bonded magnets. The invention further encompasses methods for simulating atomization conditions. In one aspect, the invention includes an atomization method for forming a magnet powder comprising: a) forming a melt comprising R.sub.2.1 Q.sub.13.9 B.sub.1, Z and X, wherein R is a rare earth element; X is an element selected from the group consisting of carbon, nitrogen, oxygen and mixtures thereof; Q is an element selected from the group consisting of Fe, Co and mixtures thereof; and Z is an element selected from the group consisting of Ti, Zr, Hf and mixtures thereof; b) atomizing the melt to form generally spherical alloy powder granules having an internal structure comprising at least one of a substantially amorphous phase or a substantially nanocrystalline phase; and c) heat treating the alloy powder to increase an energy product of the alloy powder; after the heat treatment, the alloy powder comprising an energy product of at least 10 MGOe. In another aspect, the invention includes a magnet comprising R, Q, B, Z and X, wherein R is a rare earth element; X is an element selected from the group consisting of carbon, nitrogen, oxygen and mixtures thereof; Q is an element selected from the group consisting of Fe, Co and mixtures thereof; and Z is an element selected from the group consisting of Ti, Zr, Hf and mixtures thereof; the magnet comprising an internal structure comprising R.sub.2.1 Q.sub.13.9 B.sub.1.

Sellers, Charles H. (Idaho Falls, ID); Branagan, Daniel J. (Idaho Falls, ID); Hyde, Timothy A. (Idaho Falls, ID)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Atomic Power in Space: A History  

DOE R&D Accomplishments (OSTI)

"Atomic Power in Space," a history of the Space Isotope Power Program of the United States, covers the period from the program's inception in the mid-1950s through 1982. Written in non-technical language, the history is addressed to both the general public and those more specialized in nuclear and space technologies. Interplanetary space exploration successes and achievements have been made possible by this technology, for which there is no known substitue.

1987-03-00T23:59:59.000Z

422

ZAPP: Z-pinch atomic physics program  

SciTech Connect

High-density and high-temperature plasmas have been produced in a z-pinch with a hollow gas puff. A number of interesting atomic-physics phenomena occur in these plasmas and some of these phenomena provide important diagnostic information for characterizing the plasmas. We have been interested in collisions of high-energy electrons with highly stripped ions in these plasmas. Such collisions may produce a population inversion which could result in stimulated emission in the x-ray regime.

Reed, K.

1983-01-07T23:59:59.000Z

423

Bipartite entanglement purification with neutral atoms  

E-Print Network (OSTI)

We theoretically study bipartite entanglement purification with neutral atoms via cavity-assistant interaction and linear optical elements. We focus on entanglement distillation and the recurrence protocol, whose performances under idealized and realistic conditions are discussed. The implementation of these purification protocols has been tested with numerical simulations. We analyze the performance and stability of all required operations and emphasize that all techniques are feasible with current experimental technology.

Xue, P

2008-01-01T23:59:59.000Z

424

Bipartite entanglement purification with neutral atoms  

E-Print Network (OSTI)

We theoretically study bipartite entanglement purification with neutral atoms via cavity-assistant interaction and linear optical elements. We focus on entanglement distillation and the recurrence protocol, whose performances under idealized and realistic conditions are discussed. The implementation of these purification protocols has been tested with numerical simulations. We analyze the performance and stability of all required operations and emphasize that all techniques are feasible with current experimental technology.

P. Xue; X. -F. Zhou

2008-09-04T23:59:59.000Z

425

Wide-Field Astronomical Surveys in the Next Decade  

Science Conference Proceedings (OSTI)

Wide-angle surveys have been an engine for new discoveries throughout the modern history of astronomy, and have been among the most highly cited and scientifically productive observing facilities in recent years. This trend is likely to continue over the next decade, as many of the most important questions in astrophysics are best tackled with massive surveys, often in synergy with each other and in tandem with the more traditional observatories. We argue that these surveys are most productive and have the greatest impact when the data from the surveys are made public in a timely manner. The rise of the 'survey astronomer' is a substantial change in the demographics of our field; one of the most important challenges of the next decade is to find ways to recognize the intellectual contributions of those who work on the infrastructure of surveys (hardware, software, survey planning and operations, and databases/data distribution), and to make career paths to allow them to thrive.

Strauss, Michael A.; /Princeton U.; Tyson, J.Anthony; /UC, Davis; Anderson, Scott F.; /Washington U., Seattle, Astron. Dept.; Axelrod, T.S.; /LSST Corp.; Becker, Andrew C.; /Washington U., Seattle, Astron. Dept.; Bickerton, Steven J.; /Princeton U.; Blanton, Michael R.; /New York U.; Burke, David L.; /SLAC; Condon, J.J.; /NRAO, Socorro; Connolly, A.J.; /Washington U., Seattle, Astron. Dept.; Cooray, Asantha R.; /UC, Irvine; Covey, Kevin R.; /Harvard U.; Csabai, Istvan; /Eotvos U.; Ferguson, Henry C.; /Baltimore, Space Telescope Sci.; Ivezic, Zeljko; /Washington U., Seattle, Astron. Dept.; Kantor, Jeffrey; /LSST Corp.; Kent, Stephen M.; /Fermilab; Knapp, G.R.; /Princeton U.; Myers, Steven T.; /NRAO, Socorro; Neilsen, Eric H., Jr.; /Fermilab; Nichol, Robert C.; /Portsmouth U., ICG /Harish-Chandra Res. Inst. /Caltech, IPAC /Potsdam, Max Planck Inst. /Harvard U. /Hawaii U. /UC, Berkeley, Astron. Dept. /Baltimore, Space Telescope Sci. /NOAO, Tucson /Carnegie Mellon U. /Chicago U., Astron. Astrophys. Ctr.

2011-11-14T23:59:59.000Z

426

Ultra Wide Band RFID Neutron Tags for Nuclear Materials Monitoring  

SciTech Connect

Recent advancements in the ultra-wide band Radio Frequency Identification (RFID) technology and solid state pillar type neutron detectors have enabled us to move forward in combining both technologies for advanced neutron monitoring. The LLNL RFID tag is totally passive and will operate indefinitely without the need for batteries. The tag is compact, can be directly mounted on metal, and has high performance in dense and cluttered environments. The LLNL coin-sized pillar solid state neutron detector has achieved a thermal neutron detection efficiency of 20% and neutron/gamma discrimination of 1E5. These performance values are comparable to a fieldable {sup 3}He based detector. In this paper we will discuss features about the two technologies and some potential applications for the advanced safeguarding of nuclear materials.

Nekoogar, F; Dowla, F; Wang, T

2010-01-27T23:59:59.000Z

427

The University of Hawaii Wide Field Imager (UHWFI)  

E-Print Network (OSTI)

The University of Hawaii Wide-Field Imager (UHWFI) is a focal compressor system designed to project the full half-degree field of the UH 2.2 m telescope onto the refurbished UH 8Kx8K CCD camera. The optics use Ohara glasses and are mounted in an oil-filled cell to minimize light losses and ghost images from the large number of internal lens surfaces. The UHWFI is equipped with a six-position filter wheel and a rotating sector blade shutter,both driven by stepper motors. The instrument saw first light in 2004 in an engineering mode. After filling the lens cell with index matching oil, integration of all software components into the user interface, tuning of the CCD performance, and the purchase of the final filter set, UHWFI is now fully commissioned at the UH 2.2 m telescope.

Klaus W. Hodapp; Andreas Seifahrt; Gerard A. Luppino; Richard Wainscoat; Ed Sousa; Hubert Yamada; Alan Ryan; Richard Shelton; Mel Inouye; Andrew J. Pickles; Yanko K. Ivanov

2006-04-01T23:59:59.000Z

428

Affordable Digital Planetariums with WorldWide Telescope  

E-Print Network (OSTI)

Digital planetariums can provide a broader range of educational experiences than the more classical planetariums that use star-balls. This is because of their ability to project images, content from current research and the 3D distribution of the stars and galaxies. While there are hundreds of planetariums in the country the reason that few of these are full digital is the cost. In collaboration with Microsoft Research (MSR) we have developed a way to digitize existing planetariums for approximately \\$40,000 using software freely available. We describe here how off the shelf equipment, together with MSR's WorldWide Telescope client can provide a rich and truly interactive experience. This will enable students and the public to pan though multi-wavelength full-sky scientific data sets, explore 3d visualizations of our Solar System (including trajectories of millions of minor planets), near-by stars, and the SDSS galaxy catalog.

Rosenfield, Philip; Fay, Jonathan; Carey, Larry; Sayres, Conor; Tofflemire, Benjamin

2010-01-01T23:59:59.000Z

429

Wide-range radioactive-gas-concentration detector  

DOE Patents (OSTI)

A wide-range radioactive-gas-concentration detector and monitor capable of measuring radioactive-gas concentrations over a range of eight orders of magnitude is described. The device is designed to have an ionization chamber sufficiently small to give a fast response time for measuring radioactive gases but sufficiently large to provide accurate readings at low concentration levels. Closely spaced parallel-plate grids provide a uniform electric field in the active region to improve the accuracy of measurements and reduce ion migration time so as to virtually eliminate errors due to ion recombination. The parallel-plate grids are fabricated with a minimal surface area to reduce the effects of contamination resulting from absorption of contaminating materials on the surface of the grids. Additionally, the ionization-chamber wall is spaced a sufficient distance from the active region of the ionization chamber to minimize contamination effects.

Anderson, D.F.

1981-11-16T23:59:59.000Z

430

Using the World Wide Web at the Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

at the Lab at the Lab Browser information Web browser installation at the Lab Berkeley Lab (LBNL) policy about publishing Web pages Publishing web pages at Berkeley Lab (LBNL) Return to Top Return to Top Web Publishing, Publishing Tools, etc. w3.org: Many HTML converters (tools that create HTML from other formats) TableMaker (web interface to making Netscape-style tables) Colors in webpages CGIs, forms FrameShop (web interface to making frames for Netscape, etc.) The LaTeX2HTML package RosettaMan(reverse compile man pages from formatted form to a number of source formats, including HTML) wget: GNU web mirroring package web "mirroring" via DNS Yahoo's HTML Validators, checkers page HTML Standards, Documentation, the World Wide Web project Graphics Files Icons Imagemaps

431

First AID (Atom counting for Isotopic Determination).  

SciTech Connect

Los Alamos National Laboratory (LANL) has established an in vitro bioassay monitoring program in compliance with the requirements in the Code of Federal Regulations, 10 CFR 835, Occupational Radiation Protection. One aspect of this program involves monitoring plutonium levels in at-risk workers. High-risk workers are monitored using the ultra-sensitive Therrnal Ionization Mass Spectrometry (TIMS) technique to ensure compliance with DOE standards. TIMS is used to measure atom ratios of 239Pua nd 240Puw ith respect to a tracer isotope ('Pu). These ratios are then used to calculate the amount of 239Pu and 240Pup resent. This low-level atom counting technique allows the calculation of the concentration levels of 239Pu and 240Pu in urine for at risk workers. From these concentration levels, dose assessments can be made and worker exposure levels can be monitored. Detection limits for TIMS analysis are on the order of millions of atoms, which translates to activity levels of 150 aCi 239Pua nd 500 aCi for 240Pu. pCi for Our poster presentation will discuss the ultra-sensitive, low-level analytical technique used to measure plutonium isotopes and the data verification methods used for validating isotopic measurements.

Roach, J. L. (Jeffrey L.); Israel, K. M. (Kimberly M.); Steiner, R. E. (Robert E.); Duffy, C. J. (Clarence J.); Roench, F. R. (Fred R.)

2002-01-01T23:59:59.000Z

432

EIS-0380: EPA Notice of Availability of the Final Site-Wide Environmen...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EPA Notice of Availability of the Final Site-Wide Environmental Impact Statement EIS-0380: EPA Notice of Availability of the Final Site-Wide Environmental Impact Statement...

433

EIS-0387: Y-12 National Security Complex Site-Wide Environmental...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7: Y-12 National Security Complex Site-Wide Environmental Impact Statement, Oak Ridge, Tennessee EIS-0387: Y-12 National Security Complex Site-Wide Environmental Impact Statement,...

434

OpenPA: Open Portable Atomics | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

(Open Portable Atomics) is an open source library intended to provide a consistent C API for performing atomic operations on a variety of platforms. The main goal of the...

435

Contributions of Atom Probe Tomography to the Understanding of ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Since the introduction of the computer-controlled atom probe field ion ... to the understanding of steels have been made primarily due to its near atomic ... of the Microstructure-Property-Processing Relationships in a Series of...

436

Imaging Lithium Atoms at Sub-Angstrom Resolution  

E-Print Network (OSTI)

110] orientation for LiCoO 2 without lithium atoms ( upper)and with lithium atoms (lower). Images are simulated at 0.9Horn LBNL-56646 resolution of lithium ions in LiCoO 2 . Fall

O'Keefe, Michael A.; Shao-Horn, Yang

2005-01-01T23:59:59.000Z

437

Hybrid approaches to quantum information using ions, atoms and photons  

E-Print Network (OSTI)

This thesis presents two hybrid systems for quantum information processing - one joining cold ions and cold atoms and another coupling linear chains of atomic ions with photons via an optical resonator. The first experimental ...

Cetina, Marko, Ph. D. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

438

Squeezing collective atomic spins with an optical resonator  

E-Print Network (OSTI)

This thesis describes two methods of overcoming the standard quantum limit of signal-to-noise ratio in atomic precision measurements. In both methods, the interaction between an ultracold atomic ensemble and an optical ...

Leroux, Ian Daniel

2011-01-01T23:59:59.000Z

439

Radium-226 and calcium uptake by crops grown in mixtures of sand and cay tailings from phosphate mining  

Science Conference Proceedings (OSTI)

Radium-226 is a naturally occurring radionuclide found in reclaimed clay and sand tailing from phosphate mining. Field studies were conducted to investigate the effects of sand/clay ratio (SCR), Ca supplement and organic amendments on the {sup 226}Ra concentration in turnip, banana pepper, cabbage, yellow squash, mustard, and alfalfa. For vegetables, treatment effects included SCR (2:1, 4:1, 6:1, and 8:1), phosphogypsum (PG) 0,22, and 134 Mg ha{sup {minus}1}, and peat 0,100, and 200 Mg ha{sup {minus}1}. For alfalfa grown in a 1:1 SCR mixture, treatments included organic amendments (control, peat, sewage slude, sawdust, composted sewage sludge, composted garbage and humate) applied at 44.8 Mg ha{sup {minus}1} (2.2 Mg ha{sup {minus}1} for humate). Plant {sup 226}Ra concentration tended to be higher in the 4:1 than in the 2:1 SCR mix but this depended on the crop an d the season. Organic amendments and PG had no effect (p<0.05) on the {sup 226}Ra concentration in vegetables and alfalfa. Mean {sup 226}Ra concentration in plant tissues ranged from 3.4 Bq kg{sup {minus}1} in banana pepper fruit to 31.1 Bq kg{sup {minus}1}. A quadratic relationship based on 631 observations was observed between {sup 226}Ra and Ca concentration in plant tissues. The {sup 226}Ra/Ca ratio in plant tissues ranged from 0.85 to 2.13 kBq {sup 226}Ra kg{sup {minus}1} Ca and decreased with increasing plant {sup 226}Ra. Results indicated that wide differences in plant {sup 226}Ca concentration were related more to differences in plant Ca levels than to soil factors. 21 refs., 1 fig., 6 tabs.

Million, J.B. [Univ. of Hawaii, Hilo, HI (United States); Sartain, J.B. [Univ. of Florida, Gainesville, FL (United States); Gonzalez, R.X.; Carrier, W.D. III [Bromwell & Carrier, Lakeland, FL (United States)

1994-07-01T23:59:59.000Z

440

Atomic Safety and Licensing Board Panel Biennial Report, Fiscal Years 1993--1994. Volume 6  

SciTech Connect

In Fiscal Year 1993, the Atomic Safety and Licensing Board Panel (``the Panel``) handled 30 proceedings. In Fiscal Year 1994, the Panel handled 36 proceedings. The cases addressed issues in the construction, operation, and maintenance of commercial nuclear power reactors and other activities requiring a license form the Nuclear Regulatory Commission. This report sets out the Panel`s caseload during the year and summarizes, highlight, and analyzes how the wide- ranging issues raised in those proceedings were addressed by the Panel`s judges and licensing boards.

NONE

1995-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Mercury Atomic Clock Sets Time-Keeping Record  

Science Conference Proceedings (OSTI)

Mercury Atomic Clock Sets Time-Keeping Record. ... A prototype mercury optical clock originally was demonstrated at NIST in 2000. ...

2013-08-27T23:59:59.000Z

442

NIST: Mercury, Atomic Ref. Data for Elect. Struct. Calc.  

Science Conference Proceedings (OSTI)

Table of contents logo, Atomic Reference Data for Electronic Structure Calculations. Mercury. Key to notation | HTML table ...

443

New Web Site Puts Atomic Time on Your Computer  

Science Conference Proceedings (OSTI)

New Web Site Puts Atomic Time on Your Computer. For Immediate Release: October 14, 1999. *. Bookmark and Share. Contact ...

2010-11-26T23:59:59.000Z

444

NIST: Uranium, Atomic Ref. Data for Elect. Struct. Calc.  

Science Conference Proceedings (OSTI)

Table of contents logo, Atomic Reference Data for Electronic Structure Calculations. Uranium. Key to notation | HTML table ...

445

Atoms Dressed with Light Show New Interactions, Could ...  

Science Conference Proceedings (OSTI)

... Contact: Mark Esser (301) 975-8735. Animation demonstrates enhancing low-energy atom cloud interactions with a light dressing. ...

2011-12-20T23:59:59.000Z

446

Workshop on atomic physics at the National Synchrotron Light Source  

SciTech Connect

The workshop emphasis was to acquaint the atomic physics community with the range of experimental capabilities of the NSLS. (GHT)

Jones, K.W.; Johnson, B.M.; Gregory, D.C. (eds.)

1981-01-01T23:59:59.000Z

447

Atomic-scale Chemical Quantification of Oxide Interfaces Using ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Multifunctional Oxides. Presentation Title, Atomic-scale Chemical...

448

COQA: A CONCURRENT PROGRAMMING MODEL WITH UBIQUITOUS ATOMICITY  

E-Print Network (OSTI)

to any deeper understanding of atomic and molecular systems. The basic problem is to find the solutions

Smith, Scott F.

449

Communication: In search of four-atom chiral metal clusters  

Science Conference Proceedings (OSTI)

A combined study utilizing anion photoelectron spectroscopy and density functional theory was conducted to search for four-atom

Xinxing Zhang; Martin Tschurl; Evan Collins; Yi Wang; Qian Wang; Yawei Li; Qiang Sun; Puru Jena; Gerd Gantefoer; Ulrich Boesl

2013-01-01T23:59:59.000Z

450

NIST: Thorium, Atomic Ref. Data for Elect. Struct. Calc.  

Science Conference Proceedings (OSTI)

Table of contents logo, Atomic Reference Data for Electronic Structure Calculations. Thorium. Key to notation | HTML table ...

451

Optical Nanofibers for Manipulating and Probing Single-Atom Fluorescence  

E-Print Network (OSTI)

We demonstrate how optical nanofibers can be used to manipulate and probe single-atom fluorescence. We show that fluorescence photons from a very small number of atoms, average atom number of less than 0.1, around the nanofiber can readily be observed through single-mode optical fiber under resonant laser irradiation. We show also that optical nanofibers enable us to probe the van der Waals interaction between atoms and surface with high precision by observing the fluorescence excitation spectrum.

K. P. Nayak; P. N. Melentiev; M. Morinaga; Fam Le Kien; V. I. Balykin; K. Hakuta

2006-10-17T23:59:59.000Z

452

Correlated Quantum Memory: Manipulating Atomic Entanglement via Electromagnetically Induced Transparency  

E-Print Network (OSTI)

We propose a feasible scheme of quantum state storage and manipulation via electromagnetically induced transparency (EIT) in flexibly $united$ multi-ensembles of three-level atoms. For different atomic array configurations, one can properly steer the signal and the control lights to generate different forms of atomic entanglement within the framework of linear optics. These results shed new light on designing the versatile quantum memory devices by using, e.g., an atomic grid.

H. Jing; X. -J. Liu; M. -L. Ge; M. -S. Zhan

2004-10-05T23:59:59.000Z

453

Atomic layer deposition of tin oxide with nitric oxide as an oxidant gas Jaeyeong Heo, Sang Bok Kim and Roy G. Gordon*  

E-Print Network (OSTI)

to applications of SnO2 such as energy- conserving windows for buildings,3 gas sensors,4,5 and transparent efficiency of the cells.6­11 The authors recently reported a successful growth of SnO2 by atomic layer process is expected to be widely useful for coating nanostructures with high surface areas and extremely

Gordon, Roy

454

Optical and electrical properties of III-V nitride wide bandgap semiconductors. Annual report, April 1, 1997--May 31, 1998  

SciTech Connect

The objectives of this project were to investigate the optical and electrical properties of III-nitride wide bandgap semiconductors (GaN, InGaN, AlGaN) and quantum wells, to understand the fundamental optical transitions and impurity properties of these materials, to study the physics components of GaN-based devices, and to provide input for new approaches toward the improvement of materials quality and the optimization of device design. We were the first group to employ transport measurement techniques on the persistent photoconductivity (PPC) state to study the impurity properties of III-nitrides. We were also one of the few research groups m in the world to employ picosecond time-resolved photoluminescence (PL) measurement technique to study mechanisms of optical transitions, LED emission, and lasing m in GaN materials. During this funding period, we have investigated a variety of GaN samples and structures grown by MBE as well as by MOCVD. We have also made a significant progress in MOCVD GaN materials growth. This report briefly discusses the following accomplishments: effects of deep level impurities in the AlGaN/GaN heterostructures; materials characterization of III-nitrides alloys; optical studies of III-nitride epilayers and quantum wells; fabrication and optical studies of III-nitride microdisk arrays; and materials growth by MOCVD.

1998-06-01T23:59:59.000Z

455

Method of performing MRI with an atomic magnetometer  

SciTech Connect

A method and apparatus are provided for performing an in-situ magnetic resonance imaging of an object. The method includes the steps of providing an atomic magnetometer, coupling a magnetic field generated by magnetically resonating samples of the object through a flux transformer to the atomic magnetometer and measuring a magnetic resonance of the atomic magnetometer.

Savukov, Igor Mykhaylovich; Matlashov, Andrei Nikolaevich; Espy, Michelle A; Volegov, Petr Lvovich; Kraus, Jr., Robert Henry; Zotev, Vadim Sergeyevich

2013-08-27T23:59:59.000Z

456

Method of performing MRI with an atomic magnetometer  

DOE Patents (OSTI)

A method and apparatus are provided for performing an in-situ magnetic resonance imaging of an object. The method includes the steps of providing an atomic magnetometer, coupling a magnetic field generated by magnetically resonating samples of the object through a flux transformer to the atomic magnetometer and measuring a magnetic resonance of the atomic magnetometer.

Savukov, Igor Mykhaylovich; Matlashov, Andrei Nikolaevich; Espy, Michelle A.; Volegov, Petr Lvovich; Kraus, Jr., Robert Henry; Zotev, Vadim Sergeyevich

2012-11-06T23:59:59.000Z

457

Determination of Atomic Data Pertinent to the Fusion Energy Program  

Science Conference Proceedings (OSTI)

We summarize progress that has been made on the determination of atomic data pertinent to the fusion energy program. Work is reported on the identification of spectral lines of impurity ions, spectroscopic data assessment and compilations, expansion and upgrade of the NIST atomic databases, collision and spectroscopy experiments with highly charged ions on EBIT, and atomic structure calculations and modeling of plasma spectra.

None

2013-06-11T23:59:59.000Z

458

A real system evaluation of hardware atomicity for software speculation  

Science Conference Proceedings (OSTI)

In this paper we evaluate the atomic region compiler abstraction by incorporating it into a commercial system. We find that atomic regions are simple and intuitive to integrate into an x86 binary-translation system. Furthermore, doing so trivially enables ... Keywords: atomicity, checkpoint, dynamic translation, optimization, speculation

Naveen Neelakantam; David R. Ditzel; Craig Zilles

2010-03-01T23:59:59.000Z

459

Duality in spaces of finite linear combinations of atoms  

E-Print Network (OSTI)

in Hp . In other words, Hp and Fp are both quotients of the space of "formal series" of (p, )-atoms understand the space Fp we prove now the following. Proposition. Given any sequence of (p, ) atoms aj and anyDuality in spaces of finite linear combinations of atoms Fulvio Ricci and Joan Verdera Abstract

Verdera, Joan

460

Duality in spaces of finite linear combinations of atoms  

E-Print Network (OSTI)

are both quotients of the space of "formal series" of (p, )-atoms with p coefficients, but the equivalence understand the space Fp we prove now the following. Proposition. Given any sequence of (p, ) atoms aj and anyDuality in spaces of finite linear combinations of atoms Fulvio Ricci and Joan Verdera Abstract

Autònoma de Barcelona, Universitat

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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461

Arithmetic Aspects of Atomic Structures Charles L. Fefferman  

E-Print Network (OSTI)

atoms. The problems encountered in this pro­ cess were numerous, and the quest for an understanding. It is responsible for the relevance of number theoretic terms in the atomic energy series, but goes beyond what one­ opments which have the common target of understanding atomic densities in rigorous terms. Among

Seco, Luis A.

462

Implemention of Blocking Coordinated Atomic Actions Based on Forward  

E-Print Network (OSTI)

participants. A very important decision was to structure any atomic action as a package: the atomic action Actions as Packages CA actions should correspond to the main structuring units of the language used, atomicity, coordinated error recovery, fault tolerant software structuring, conversations, transactions. 1

Newcastle upon Tyne, University of

463

Effect on the Lifetime of an Atom Undergoing a Dipole Transition Due to the Presence of a Resonating Atom  

Science Conference Proceedings (OSTI)

The modification of the transition rate from the Einstein A coefficient for an atomic dipole transition due to the presence of a similar atom is obtained without the use of damping theory.

Edwin A. Power

1967-01-01T23:59:59.000Z

464

Atoms in Flight: The Remarkable Connections between Atomic and Hadronic Physics  

SciTech Connect

Atomic physics and hadron physics are both based on Yang Mills gauge theory; in fact, quantum electrodynamics can be regarded as the zero-color limit of quantum chromodynamics. I review a number of areas where the techniques of atomic physics provide important insight into the theory of hadrons in QCD. For example, the Dirac-Coulomb equation, which predicts the spectroscopy and structure of hydrogenic atoms, has an analog in hadron physics in the form of light-front relativistic equations of motion which give a remarkable first approximation to the spectroscopy, dynamics, and structure of light hadrons. The renormalization scale for the running coupling, which is unambiguously set in QED, leads to a method for setting the renormalization scale in QCD. The production of atoms in flight provides a method for computing the formation of hadrons at the amplitude level. Conversely, many techniques which have been developed for hadron physics, such as scaling laws, evolution equations, and light-front quantization have equal utility for atomic physics, especially in the relativistic domain. I also present a new perspective for understanding the contributions to the cosmological constant from QED and QCD.

Brodsky, Stanley J.; /SLAC

2012-02-16T23:59:59.000Z

465

Novel wide band gap materials for highly efficient thin film tandem solar cells  

SciTech Connect

Tandem solar cells (TSCs), which use two or more materials to absorb sunlight, have achieved power conversion efficiencies of >25% versus 11-20% for commercialized single junction solar cell modules. The key to widespread commercialization of TSCs is to develop the wide-band, top solar cell that is both cheap to fabricate and has a high open-circuit voltage (i.e. >1V). Previous work in TSCs has generally focused on using expensive processing techniques with slow growth rates resulting in costs that are two orders of magnitude too expensive to be used in conventional solar cell modules. The objective of the PLANT PV proposal was to investigate the feasibility of using Ag(In,Ga)Se2 (AIGS) as the wide-bandgap absorber in the top cell of a thin film tandem solar cell (TSC). Despite being studied by very few in the solar community, AIGS solar cells have achieved one of the highest open-circuit voltages within the chalcogenide material family with a Voc of 949mV when grown with an expensive processing technique (i.e. Molecular Beam Epitaxy). PLANT PVâ??s goal in Phase I of the DOE SBIR was to 1) develop the chemistry to grow AIGS thin films via solution processing techniques to reduce costs and 2) fabricate new device architectures with high open-circuit voltage to produce full tandem solar cells in Phase II. PLANT PV attempted to translate solution processing chemistries that were successful in producing >12% efficient Cu(In,Ga)Se2 solar cells by replacing copper compounds with silver. The main thrust of the research was to determine if it was possible to make high quality AIGS thin films using solution processing and to fully characterize the materials properties. PLANT PV developed several different types of silver compounds in an attempt to fabricate high quality thin films from solution. We found that silver compounds that were similar to the copper based system did not result in high quality thin films. PLANT PV was able to deposit AIGS thin films using a mixture of solution and physical vapor deposition processing, but these films lacked the p-type doping levels that are required to make decent solar cells. Over the course of the project PLANT PV was able to fabricate efficient CIGS solar cells (8.7%) but could not achieve equivalent performance using AIGS. During the nine-month grant PLANT PV set up a variety of thin film characterization tools (e.g. drive-level capacitance profiling) at the Molecular Foundry, a Department of Energy User Facility, that are now available to both industrial and academic researchers via the grant process. PLANT PV was also able to develop the back end processing of thin film solar cells at Lawrence Berkeley National Labs to achieve 8.7% efficient CIGS solar cells. This processing development will be applied to other types of thin film PV cells at the Lawrence Berkeley National Labs. While PLANT PV was able to study AIGS film growth and optoelectronic properties we concluded that AIGS produced using these methods would have a limited efficiency and would not be commercially feasible. PLANT PV did not apply for the Phase II of this grant.

Brian E. Hardin, Stephen T. Connor, Craig H. Peters

2012-06-11T23:59:59.000Z

466

Amplitude and phase?modulation (AM?PM) wide?band photothermal spectrometry. II. Experiment  

Science Conference Proceedings (OSTI)

Amplitude and phase?modulation (AM?PM) wide?band photothermal spectrometry is experimentally demonstrated

J. F. Power

1990-01-01T23:59:59.000Z

467

Measurements and models of wide area TCP conversations  

SciTech Connect

This paper describes measurements of all the wide area network TCP conversations between the Lawrence Berkeley Laboratory (LBL) and the rest of the world for the months of November, 1990, and March, 1991. Some 500,000 conversations were recorded, encompassing 11 different major protocols. We look at aggregate characteristics of these conversations, both overall and by TCP protocol (e.g., smtp, ftp), computing the distributions of amount of data transferred, network bandwidth used, conversion lifetimes and conversation interarrival times. Temporal traffic variation is also investigated, showing the variation of number of active conversations and network bandwidth utilization over periods of 24 hours, 7 days and 30 days. Long term variation is also investigated by separately analyzing November and March data (which reveals a 10--20% increase in almost all aggregate traffic characteristics in just four months). We classify each conversation geographically and discover that the connectivity of the conversations were remarkably rich, including traffic to 48 of the 50 states in the US and 23 foreign countries. Finally, we develop a number of models for describing conversations of the various protocols. From these models we can more readily assess how each protocol is used and how the use changes as network utilization grows.

Paxson, V.

1991-05-01T23:59:59.000Z

468

Energy efficiency study of single-wide manufactured homes  

SciTech Connect

This Cooperative Research and Development Agreement (CRADA) was among Tennessee Technological University, Clayton Homes, Inc., and Oak Ridge National Laboratory (ORNL). Manufactured homes now make up a substantial portion of the new home market, and improving the energy efficiency of these homes would save significant amounts of energy. This project explored the impact of differing levels of attic insulation, the use of evacuated insulation panels, and the application of a solar reflective roof coating. The performance of the installed roof cavity insulation compared favorably with that predicted by laboratory measurements. The more heavily insulated of the two units used about 30% less energy over the period of the project than the standard unit. Based on the experimental data, computer simulations for nine cities were completed for a single-wide manufactured home with the solar reflective roof coating. Annual electric power savings ranged from 894 kWh in Rapid City to 2119 kWh for the same roof area in Los Angeles. The field performance of vacuum insulation panels was compared with laboratory performance. The panels will perform as expected if protected from puncture.

Yarbrough, D.W.; Andrews, G.J.; Stovall, T.K.; Kelly, T.

1999-12-01T23:59:59.000Z

469

Wide-Bandgap Compound Semiconductors to Enable Novel Semiconductor Devices  

DOE Green Energy (OSTI)

This report represents the completion of a three-year Laboratory-Directed Research and Development (LDRD) program that focused on research and development of GaN-based wide bandgap semiconductor materials (referred to as III-N materials). Our theoretical investigations include the determination of fundamental materials parameters from first-principles calculations, the study of gain properties of III-N heterostructures using a microscopic laser theory and density-functional-theory, charge-state calculations to determine the core structure and energy levels of dislocations in III-N materials. Our experimental investigations include time-resolved photoluminescence and magneto-luminescence studies of GaN epilayers and multiquantum well samples as well as x-ray diffraction studies of AlGaN ternary alloys. In addition, we performed a number of experiments to determine how various materials processing steps affect both the optical and electrical properties of GaN-based materials. These studies include photoluminescence studies of GaN epilayers after post-growth rapid thermal annealing, ion implantation to produce n- and p-type material and electrical and optical studies of plasma-etched structures.

Crawford, M.H.; Chow, W.W.; Wright, A.F.; Lee, S.R.; Jones, E.D.; Han, J.; Shul, R.J.

1999-04-01T23:59:59.000Z

470

Saturation of fidelity in the atom-optics kicked rotor  

E-Print Network (OSTI)

We show that the quantum fidelity is accessible to cold atom experiments for a large class of evolutions in periodical potentials, properly taking into account the experimental initial conditions of the atomic ensemble. We prove analytically that, at the fundamental quantum resonances of the atom-optics kicked rotor, the fidelity saturates at a constant, time-independent value after a small number of kicks. The latter saturation arises from the bulk of the atomic ensemble, whilst for the resonantly accelerated atoms the fidelity is predicted to decay slowly according to a power law.

Sandro Wimberger; Andreas Buchleitner

2006-03-10T23:59:59.000Z

471

Capacitive coupling of atomic systems to mesoscopic conductors  

E-Print Network (OSTI)

We describe a technique that enables a strong, coherent coupling between isolated neutral atoms and mesoscopic conductors. The coupling is achieved by exciting atoms trapped above the surface of a superconducting transmission line into Rydberg states with large electric dipole moments, that induce voltage fluctuations in the transmission line. Using a mechanism analogous to cavity quantum electrodynamics an atomic state can be transferred to a long-lived mode of the fluctuating voltage, atoms separated by millimeters can be entangled, or the quantum state of a solid state device can be mapped onto atomic or photonic states.

Srensen, A S; Childress, L; Lukin, M D; Sorensen, Anders S.; Wal, Caspar H. van der; Childress, Lilian; Lukin, Mikhail D.

2003-01-01T23:59:59.000Z

472

Capacitive coupling of atomic systems to mesoscopic conductors  

E-Print Network (OSTI)

We describe a technique that enables a strong, coherent coupling between isolated neutral atoms and mesoscopic conductors. The coupling is achieved by exciting atoms trapped above the surface of a superconducting transmission line into Rydberg states with large electric dipole moments, that induce voltage fluctuations in the transmission line. Using a mechanism analogous to cavity quantum electrodynamics an atomic state can be transferred to a long-lived mode of the fluctuating voltage, atoms separated by millimeters can be entangled, or the quantum state of a solid state device can be mapped onto atomic or photonic states.

Anders S. Sorensen; Caspar H. van der Wal; Lilian Childress; Mikhail D. Lukin

2003-08-27T23:59:59.000Z

473

Atomizing apparatus for making polymer and metal powders and whiskers  

DOE Patents (OSTI)

Method for making polymer particulates, such as spherical powder and whiskers, by melting a polymer material under conditions to avoid thermal degradation of the polymer material, atomizing the melt using gas jet means in a manner to form atomized droplets, and cooling the droplets to form polymer particulates, which are collected for further processing. Atomization parameters can be controlled to produce polymer particulates with controlled particle shape, particle size, and particle size distribution. For example, atomization parameters can be controlled to produce spherical polymer powders, polymer whiskers, and combinations of spherical powders and whiskers. Atomizing apparatus also is provided for atoomizing polymer and metallic materials.

Otaigbe, Joshua U. (Ames, IA); McAvoy, Jon M. (Moline, IL); Anderson, Iver E. (Ames, IA); Ting, Jason (Ames, IA); Mi, Jia (Pittsburgh, PA); Terpstra, Robert (Ames, IA)

2003-03-18T23:59:59.000Z

474

ATOMIC HYDROGEN IN A GALACTIC CENTER OUTFLOW  

SciTech Connect

We describe a population of small, high-velocity, atomic hydrogen clouds, loops, and filaments found above and below the disk near the Galactic center. The objects have a mean radius of 15 pc, velocity widths of {approx}14 km s{sup -1}, and are observed at |z| heights up to 700 pc. The velocity distribution of the clouds shows no signature of Galactic rotation. We propose a scenario where the clouds are associated with an outflow from a central star-forming region at the Galactic center. We discuss the clouds as entrained material traveling at {approx}200 km s{sup -1} in a Galactic wind.

McClure-Griffiths, N. M.; Green, J. A.; Hill, A. S. [Australia Telescope National Facility, CSIRO Astronomy and Space Science, Marsfield, NSW 2122 (Australia); Lockman, F. J. [National Radio Astronomy Observatory, Green Bank, WV 24944 (United States); Dickey, J. M. [School of Physics and Mathematics, University of Tasmania, TAS 7001 (Australia); Gaensler, B. M.; Green, A. J., E-mail: naomi.mcclure-griffiths@csiro.au [Sydney Institute for Astronomy, School of Physics, The University of Sydney, NSW 2006 (Australia)

2013-06-10T23:59:59.000Z

475

Method for producing uranium atomic beam source  

DOE Patents (OSTI)

A method for producing a beam of neutral uranium atoms is obtained by vaporizing uranium from a compound UM.sub.x heated to produce U vapor from an M boat or from some other suitable refractory container such as a tungsten boat, where M is a metal whose vapor pressure is negligible compared to that of uranium at the vaporization temperature. The compound, for example, may be the uranium-rhenium compound, URe.sub.2. An evaporation rate in excess of about 10 times that of conventional uranium beam sources is produced.

Krikorian, Oscar H. (Danville, CA)

1976-06-15T23:59:59.000Z

476

Charged-Particle Impact Ionization of Atoms  

Science Conference Proceedings (OSTI)

We have developed a hybrid method to treat charged-particle impact ionization of complex atoms and ions. The essential idea is to describe the interaction between a fast projectile and the target perturbatively, up to second order, while the initial bound state and the ejected-electron--residual-ion interaction can be handled via a convergent R-matrix with pseudo-states (close-coupling) expansion. Example results for ionization of the heavy noble gases (Ne-Xe) by positron and electron impact are presented. The general scheme for a distorted-wave treatment of ionization by heavy-particle impact is described.

Bartschat, Klaus; Guan Xiaoxu [Department of Physics and Astronomy, Drake University, Des Moines, IA 50311 (United States)

2008-08-08T23:59:59.000Z

477

Atom-molecule conversion with particle losses  

E-Print Network (OSTI)

Based on the mean-field approximation and the phase space analysis, we study the dynamics of an atom-molecule conversion system subject to particle loss. Starting from the many-body dynamics described by a master equation, an effective nonlinear Schr\\"odinger equation is introduced. The classical phase space is then specified and classified by fixed points. The boundary, which separate different dynamical regimes have been calculated and discussed. The effect of particle loss on the conversion efficiency and the self-trapping is explored.

B. Cui; L. C. Wang; X. X. Yi

2011-03-01T23:59:59.000Z

478

Stochastic Methods in Atomic Systems and QED  

E-Print Network (OSTI)

We show that treating the blackbody radiation field as a heat bath enables one to utilize powerful techniques from the realm of stochastic physics (such as the fluctuation-dissipation theorem and the related radiation damping) in order to treat problems that could not be treated rigorously by conventional methods. We illustrate our remarks by discussing specifically the effect of temperature on atomic spectral lines, and the solution to the problem of runaway solutions in the equation of motion of a radiating electron. We also present brief discussions relating to anomalous diffusion and wave packet spreading in a radiation field and the influence of quantum effects on the laws of thermodynamics.

R. F. O'Connell

2010-09-22T23:59:59.000Z

479

Stationary light in cold atomic gases  

E-Print Network (OSTI)

We discuss stationary light created by a pair of counter-propagating control fields in Lambda-type atomic gases with electromagnetically induced transparency for the case of negligible Doppler broadening. In this case the secular approximation used in the discussion of stationary light in hot vapors is no longer valid. We discuss the quality of the effective light-trapping system and show that in contrast to previous claims it is finite even for vanishing ground-state dephasing. The dynamics of the photon loss is in general non exponential and can be faster or slower than in hot gases.

Gor Nikoghosyan; Michael Fleischhauer

2009-03-10T23:59:59.000Z

480

The New Element Berkelium (Atomic Number 97)  

DOE R&D Accomplishments (OSTI)

An isotope of the element with atomic number 97 has been discovered as a product of the helium-ion bombardment of americium. The name berkelium, symbol Bk, is proposed for element 97. The chemical separation of element 97 from the target material and other reaction products was made by combinations of precipitation and ion exchange adsorption methods making use of its anticipated (III) and (IV) oxidation states and its position as a member of the actinide transition series. The distinctive chemical properties made use of in its separation and the equally distinctive decay properties of the particular isotope constitute the principal evidence for the new element.

Seaborg, G. T.; Thompson, S. G.; Ghiorso, A.

1950-04-26T23:59:59.000Z

Note: This page contains sample records for the topic "atoms wide grown" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Theoretical atomic physics code development I: CATS: Cowan Atomic Structure Code  

Science Conference Proceedings (OSTI)

An adaptation of R.D. Cowan's Atomic Structure program, CATS, has been developed as part of the Theoretical Atomic Physics (TAPS) code development effort at Los Alamos. CATS has been designed to be easy to run and to produce data files that can interface with other programs easily. The CATS produced data files currently include wave functions, energy levels, oscillator strengths, plane-wave-Born electron-ion collision strengths, photoionization cross sections, and a variety of other quantities. This paper describes the use of CATS. 10 refs.

Abdallah, J. Jr.; Clark, R.E.H.; Cowan, R.D.

1988-12-01T23:59:59.000Z

482

Forecast of Standard Atomic Weights for the Mononuclidic Elements 2011  

SciTech Connect

In this short report, I will provide an early warning about potential changes to the standard atomic weight values for the twenty mononuclidic and the so-called pseudo-mononuclidic ({sup 232}Th and {sup 231}Pa) chemical elements due to the estimated changes in the mass values to be published in the next Atomic Mass Tables within the next two years. There have been many new measurements of atomic masses, since the last published Atomic Mass Table. The Atomic Mass Data Center has released an unpublished version of the present status of the atomic mass values as a private communication. We can not update the Standard Atomic Weight Table at this time based on these unpublished values but we can anticipate how many changes are probably going to be expected in the next few years on the basis of the forthcoming publication of the Atomic Mass Table. I will briefly discuss the procedures that the Atomic Weights Commission used in deriving the recommended Standard Atomic Weight values and their uncertainties from the atomic mass values. I will also discuss some concern raised about a proposed change in the definition of the mole. The definition of the mole is now connected directly to the mass of a {sup 12}C isotope (which is defined as 12 exactly) and to the kilogram. A change in the definition of the mole will probably impact the mass of {sup 12}C.

Holden, N.E.; Holden, N.; Holden,N.E.

2011-07-27T23:59:59.000Z

483

Novel Protein Crystal Growth Electrochemical Cell For Applications in X-ray Diffraction and Atomic Force Microscopy  

Science Conference Proceedings (OSTI)

A new crystal growth cell based on transparent indium tin oxide (ITO) glass-electrodes for electrochemically assisted protein crystallization allows for reduced nucleation and crystal quality enhancement. The crystallization behavior of lysozyme and ferritin was monitored as a function of the electric current applied to the growth cell. The X-ray diffraction analysis showed that for specific currents, the crystal quality is substantially improved. No conformational changes were observed in the 3D crystallographic structures determined for crystals grown under different electric current regimes. Finally, the strong crystal adhesion on the surface of ITO electrode because of the electroadhesion allows a sufficiently strong fixing of the protein crystals, to undergo atomic force microscopy investigations in a fluid cell.

G Gil-Alvaradejo; R Ruiz-Arellano; C Owen; A Rodriguez-Romero; E Rudino-Pinera; M Antwi; V Stojanoff; A Moreno

2011-12-31T23:59:59.000Z

484

In-situ Synchrotron Radiation X-ray Scattering Study On The Initial Structure Of Atomic Layer Deposition  

Science Conference Proceedings (OSTI)

Due to the excellent conformality of ALD, it is not only adopted thin film, but also has been adopted for the fabrication of nanostructures. The surface reaction of ALD process is dependent on the substrate condition, thus the study on initial stage of ALD process is crucial to achieve controllable film growth. By the way, because of quite low scattering intensity of initial ultra thin layer, the high flux Synchrotron Radiation is needed. Synchrotron radiation x-ray scattering measurements allow us to investigate the atomic structure evolution of a few nanometer thickness films at the initial growth stage, nondestructively. Ru and TaN ALD films were grown. The thickness, roughness, and electron density were estimated by X-Ray Reflectivity (XRR) analysis. The island structures and its coverage also were estimated.

Park, Y. J. [Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk (Korea, Republic of); Department of MSE, POSTECH, Pohang, Gyeongbuk (Korea, Republic of); Lee, D. R. [Department of Physics, Soongsil univ., Seoul (Korea, Republic of); Baik, S. [Department of MSE, POSTECH, Pohang, Gyeongbuk (Korea, Republic of)

2011-12-23T23:59:59.000Z

485

Nano Positioning of Single Atoms in a Micro Cavity  

E-Print Network (OSTI)

The coupling of individual atoms to a high-finesse optical cavity is precisely controlled and adjusted using a standing-wave dipole-force trap, a challenge for strong atom-cavity coupling. Ultracold Rubidium atoms are first loaded into potential minima of the dipole trap in the center of the cavity. Then we use the trap as a conveyor belt that we set into motion perpendicular to the cavity axis. This allows us to repetitively move atoms out of and back into the cavity mode with a repositioning precision of 135 nm. This makes possible to either selectively address one atom of a string of atoms by the cavity, or to simultaneously couple two precisely separated atoms to a higher mode of the cavity.

Stefan Nussmann; Markus Hijlkema; Bernhard Weber; Felix Rohde; Gerhard Rempe; Axel Kuhn

2005-06-10T23:59:59.000Z

486

Active probing of cloud multiple scattering, optical depth, vertical thickness, and liquid water content using wide-angle imaging LIDAR.  

SciTech Connect

At most optical wavelengths, laser light in a cloud lidar experiment is not absorbed but merely scattered out of the beam, eventually escaping the cloud via multiple scattering. There is much information available in this light scattered far from the input beam, information ignored by traditional 'on-beam' lidar. Monitoring these off-beam returns in a fully space- and time-resolved manner is the essence of our unique instrument, Wide Angle Imaging Lidar (WAIL). In effect, WAIL produces wide-field (60-degree full-angle) 'movies' of the scattering process and records the cloud's radiative Green functions. A direct data product of WAIL is the distribution of photon path lengths resulting from multiple scattering in the cloud. Following insights from diffusion theory, we can use the measured Green functions to infer the physical thickness and optical depth of the cloud layer, and, from there, estimate the volume-averaged liquid water content. WAIL is notable in that it is applicable to optically thick clouds, a regime in which traditional lidar is reduced to ceilometry. Here we present recent WAIL data oti various clouds and discuss the extension of WAIL to full diurnal monitoring by means of an ultra-narrow magneto-optic atomic line filter for daytime measurements.

Love, Steven P.; Davis, A. B. (Anthony B.); Rohde, C. A. (Charles A.); Tellier, L. L. (Larry L.); Ho, Cheng,

2002-01-01T23:59:59.000Z

487

Linear surface smoothening of (Ti{sub 0.48}Al{sub 0.52})N thin films grown on rough substrates  

SciTech Connect

The evolution of surface roughness during the growth of sputter-deposited solid solution (Ti{sub 0.48}Al{sub 0.52})N films on rough high-speed-steel (HSS) substrates has been studied by atomic force microscopy. It has been revealed that the growing (Ti{sub 0.48}Al{sub 0.52})N/HSS film experiences a continuous surface smoothening. Scaling analyses along with surface power spectra calculation of the (Ti{sub 0.48}Al{sub 0.52})N films grown on smooth Si(100) substrates under the same deposition conditions indicate that this surface smoothening is linear and can be explained by a simple linear equation with surface diffusion as the smoothening mechanism and shot noise as the roughening effect. The observed linear surface smoothening in (Ti{sub 0.48}Al{sub 0.52})N/HSS films has also been confirmed by our numerical simulations of the film growth using real HSS and Si(100) substrates as their initial growth conditions and can be understood in terms of the competition between the surface-diffusion-induced decrease in substrate roughness contribution and the noise-driven roughening effect.

Liu, Z.-J.; Shum, P.W.; Shen, Y.G. [Department of Manufacturing Engineering and Engineering Management (MEEM), City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)

2005-06-20T23:59:59.000Z

488

Autoantibodies and immunoglobulins among atomic bomb survivors  

Science Conference Proceedings (OSTI)

The purpose of this study was to determine if exposure to atomic bomb radiation affects immune responsiveness, such as the occurrence of autoantibodies and levels of immunoglobulins. Rheumatoid factor, antinuclear antibody, antithyroglobulin antibody, anti-thyroid-microsomal antibody and immunoglobulin levels (IgG, IgM, IgA and IgE) were measured among 2,061 individuals exposed to atomic bomb radiation in Hiroshima and Nagasaki whose estimated doses ranged from 0 to 5.6 Gy. The prevalence and titers of rheumatoid factor were found to be increased in the individuals exposed to higher radiation doses. The IgA level in females and the IgM level in both sexes increased as radiation dose increased, although the effects of radiation exposure were not large. No effect of radiation was found on the prevalence of antinuclear antibody, antithyroglobulin antibody and anti-thyroid-microsomal antibody or on the levels of IgG and IgE. 32 refs., 2 figs., 3 tabs.

Fujiwara, Saeko; Akahoshi, Masazumi; Kodama, Kazunori; Shimaoka, Katsutaro; Akiyama, Mitoshi [Radiation Effects Research Foundation, Hiroshima (Japan); Carter, R.L. [Univ. of Florida, Gainesville, FL (United States); Yamakido, Michio [Hiroshima Univ. School of Medicine (Japan)

1994-01-01T23:59:59.000Z

489

Atomic Scale Characterization of Complex Oxide Interfaces  

SciTech Connect

Complex oxides exhibit the most disparate behaviors, from ferroelectricity to high Tc superconductivity, colossal magnetoresistance to insulating properties. For these reasons, oxide thin films are of interest for electronics and the emerging field of spintronics. But epitaxial complex oxide ultrathin films and heterostructures can be significantly affected or even dominated by the presence of interfaces and may exhibit intriguing new physical properties quite different from the bulk. A study of the relations between structure and chemistry at the atomic scale is needed to understand the macroscopic properties of such "interface-controlled" materials. For this purpose, the combination of aberration corrected Z-contrast scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) represents a very powerful tool. The availability of sub- ngstr m probes allows a level of unprecedented detail when analyzing not only the interface structure with sensitivity to single atoms, but also the interface chemistry. In this work state of the art STEM-EELS will be applied to the study of different oxide interfaces in heterostructures with titanates, manganites and cuprates based on the perovskite structure.

Varela del Arco, Maria [ORNL; Pennycook, Timothy J [ORNL; Tian, Wei [ORNL; Mandrus, David [ORNL; Pennycook, Stephen J [ORNL; Pena, V. [Universidad Complutense, Spain; Sefrioui, Z. [Universidad Complutense, Spain; Santamaria, J. [Universidad Complutense, Spain

2006-01-01T23:59:59.000Z

490

Atomic-Layer Engineering of Oxide Superconductors  

SciTech Connect

Molecular beam epitaxy technique has enabled synthesis of atomically smooth thin films, multilayers, and superlattices of cuprates and other complex oxides. Such heterostructures show high temperature superconductivity and enable novel experiments that probe the basic physics of this phenomenon. For example, it was established that high temperature superconductivity and anti-ferromagnetic phases separate on Angstrom scale, while the pseudo-gap state apparently mixes with high temperature superconductivity over an anomalously large length scale (the 'Giant Proximity Effect'). We review some recent experiments on such films and superlattices, including X-ray diffraction, atomic force microscopy, angle-resolved time of flight ion scattering and recoil spectroscopy, transport measurements, high resolution transmission electron microscopy, resonant X-ray scattering, low-energy muon spin resonance, and ultrafast photo-induced reflection high energy electron diffraction. The results include an unambiguous demonstration of strong coupling of in-plane charge excitations to out-of-plane lattice vibrations, a discovery of interface high temperature superconductivity that occurs in a single CuO{sub 2} plane, evidence for local pairs, and establishing tight limits on the temperature range of superconducting fluctuations.

Bozovic I.; Bollinger, A.T.; Eckstein, J.N.; Dubuis, G.; Pavuna, D.

2012-03-01T23:59:59.000Z

491

The HERMES Polarized Atomic Beam Source  

Science Conference Proceedings (OSTI)

The atomic beam source (ABS) provides nuclear polarized hydrogen or deuterium atoms for the HERMES target at flow rates of about 6.5 ? 1016H?/s (hydrogen in two hyperfine substates) and 6.0 ? 1016D?/s (deuterium in three hyperfine substates). The degree of dissociation of 93% for H (95% for D) at the entrance of the storage cell and the nuclear polarization of around 0.97 (H) and 0.92 (D) have been found to be constant within a a couple of percent over the whole running period of the HERMES experiment. A new dissociator (MWD) based on a microwave discharge at 2.45 GHz has been developed and installed into the HERMES?ABS in 2000. Since the velocity distribution of the MWD differs from that of the RFD the intensity could be increased further with a modified sextupole magnet system. For this purpose the way for a new start generator for sextupole tracking calculations was opened. Monte?Carlo simulations were successfully used to describe the gas expansion between nozzle

A. Nass; HERMES target group

2003-01-01T23:59:59.000Z

492

Ionization of Rydberg atoms by blackbody radiation  

E-Print Network (OSTI)

We have studied an ionization of alkali-metal Rydberg atoms by blackbody radiation (BBR). The results of the theoretical calculations of ionization rates of Li, Na, K, Rb and Cs Rydberg atoms are presented. Calculations have been performed for nS, nP and nD states which are commonly used in a variety of experiments, at principal quantum numbers n=8-65 and at the three ambient temperatures of 77, 300 and 600 K. A peculiarity of our calculations is that we take into account the contributions of BBR-induced redistribution of population between Rydberg states prior to photoionization and field ionization by extraction electric field pulses. The obtained results show that these phenomena affect both the magnitude of measured ionization rates and shapes of their dependences on n. A Cooper minimum for BBR-induced transitions between bound Rydberg states of Li has been found. The calculated ionization rates are compared with our earlier measurements of BBR-induced ionization rates of Na nS and nD Rydberg states with ...

Beterov, I I; Ryabtsev, I I; Entin, V M; Ekers, A; Bezuglov, N N

2008-01-01T23:59:59.000Z

493

The Atomic Safety and Licensing Board Panel  

SciTech Connect

Through the Atomic Energy Act, Congress made is possible for the public to get a full and fair hearing on civilian nuclear matters. Individuals who are directly affected by any licensing action involving a facility producing or utilizing nuclear materials may participate in a formal hearing, on the record, before independent judges on the Atomic Safety and Licensing Board Panel (ASLBP or Panel). Frequently, in deciding whether a license, permit, amendment, or extension should be granted to a particular applicant, the Panel members must be more than mere umpires. If appropriate, they are authorized to go beyond the issues the parties place before them in order to identify, explore, and resolve significant questions involving threats to the public health and safety that come to a board`s attention during the proceedings. This brochure explains the purpose of the panel. Also addressed are: type of hearing handled; method of public participation; formality of hearings; high-level waste; other panel responsibilities and litigation technology.

NONE

1998-03-01T23:59:59.000Z

494

Atomic clocks with suppressed blackbody radiation shift  

E-Print Network (OSTI)

We develop a nonstandard concept of atomic clocks where the blackbody radiation shift (BBRS) and its temperature fluctuations can be dramatically suppressed (by one to three orders of magnitude) independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies v1 and v2) which are exposed to the same thermal environment, there exists a "synthetic" frequency v_{syn} (v1-e12 v2) largely immune to the BBRS. As an example, it is shown that in the case of ion 171Yb+ it is possible to create a clock in which the BBRS can be suppressed to the fractional level of 10^{-18} in a broad interval near room temperature (300\\pm 15 K). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies v1 and v2. Here the frequency v_{syn} is generated as one of the components of the comb spectrum and can be used as an atomic standard.

V. I. Yudin; A. V. Taichenachev; M. V. Okhapkin; S. N. Bagayev; Chr. Tamm; E. Peik; N. Huntemann; T. E. Mehlstaubler; F. Riehle

2011-03-03T23:59:59.000Z

495

String model of the Hydrogen Atom  

E-Print Network (OSTI)

A non-moving electron hydrogen model is proposed, resolving a long standing contradiction (94 years) in the hydrogen atom. This, however, forces to not use the "in an orbit point particle kinetic energy" as the phenomenon responsible for the atom stability. The repulsion between the masses of the electron and proton is what is responsible of such stability. The mass of the electron is a field fully described by the uncertainty principle through the confinement of the particle, which is also consistent with the general theory of relativity that states: "mass-energy tells the space how to bend". Ergo, mass exerts a tension on its surrounding space and the lighter the mass the larger the space it will occupy. Based on this concept it is proposed that the orbital is the electron. The electron's orbitals are just the electron's different ways of intersecting the space; with different magnetic momenta. The coupling of this momenta with the magnetic moment of the proton finally explains the hyperfine structure of the hydrogen spectrum with an overwhelming simplicity

Omar Yepez

2007-01-31T23:59:59.000Z

496

L. James Rainwater and the Atomic Nuclei  

NLE Websites -- All DOE Office Websites (Extended Search)

L. James Rainwater and the Atomic Nucleus L. James Rainwater and the Atomic Nucleus Resources with Additional Information James Rainwater Courtesy AIP Emilio Segre Visual Archives, W. F. Meggers Gallery of Nobel Laureates "During W.W. II, I [James Rainwater] worked ... [on the] Manhattan Project, mainly doing pulsed neutron spectroscopy using the small Columbia cyclotron. ... [Maria Geoppert-Mayer] shell model suggestion in 1949 was a great triumph and fitted my belief that a nuclear shell model should represent a proper approach to understanding nuclear structure. Combined with developments of Weizsaker's semi-empirical explanation of nuclear binding, and the Bohr-Wheeler 1939 paper on nuclear fission, emphasizing distorted nuclear shapes, I was prepared to see an explanation of large nuclear quadrupole moments. The full concept came to me in late 1949 when attending a colloquium by Prof. C.H. Townes who described the experimental situation for nuclear quadrupole moments. It was a fortuitous situation made even more so by the fact that I was sharing an office with Aage Bohr that year. We had many discussions of the implications, subsequently very successfully exploited by Bohr, [Ben] Mottelson, and others of the Copenhagen Institute."1

497

The green manure value of seven clover species grown as annual crops on low and high fertility temperate soils.  

DOE Green Energy (OSTI)

Annual and perennial clover species may differ in green manure value. Seven clover (Trifolium) species were grown as annual crops on low fertility (Breton) and high fertility 15 (Edmonton) soils in Alberta

Ross, Shirley M.; King, Jane R.; Izaurralde, Roberto C.; O'Donovan, John T.

2009-05-01T23:59:59.000Z

498

X-ray magnetic circular dichroism of ferromagnetic Co{sub 4}N epitaxial films on SrTiO{sub 3}(001) substrates grown by molecular beam epitaxy  

Science Conference Proceedings (OSTI)

5-nm thick Co{sub 4}N layers capped with 3-nm thick Au layers were grown epitaxially on SrTiO{sub 3}(001) substrates by molecular beam epitaxy using solid Co and a radio-frequency NH{sub 3} plasma. Spin and orbital magnetic moments of the Co{sub 4}N layers were estimated using x-ray magnetic circular dichroism (XMCD) measurements at 300 K. The site-averaged Co 3d spin magnetic moment is evaluated to be about 1.4 {mu}{sub B}, which is smaller than that predicted theoretically (1.58 {mu}{sub B}). The element-specific XMCD intensities for the Co L{sub 3} edge and N K edge show that the magnetic moment is induced at the N atoms.

Ito, Keita; Harada, Kazunori; Toko, Kaoru; Suemasu, Takashi [Institute of Applied Physics, University of Tsukuba, Ibaraki 305-8573 (Japan); Ye, Mao; Kimura, Akio [Graduate School of Science, Hiroshima University, Hiroshima 739-8526 (Japan); Takeda, Yukiharu; Saitoh, Yuji [Japan Atomic Energy Agency (JAEA), SPring-8, Hyogo 679-5198 (Japan); Akinaga, Hiro [National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8569 (Japan)

2011-12-19T23:59:59.000Z

499

Effects of laser energy fluence on the onset and growth of the Rayleigh-Taylor instabilities and its influence on the topography of the Fe thin film grown in pulsed laser deposition facility  

SciTech Connect

The effect of laser energy fluence on the onset and growth of Rayleigh-Taylor (RT) instabilities in laser induced Fe plasma is investigated using time-resolved fast gated imaging. The snow plow and shock wave models are fitted to the experimental results and used to estimate the ablation parameters and the density of gas atoms that interact with the ablated species. It is observed that RT instability develops during the interface deceleration stage and grows for a considerable time for higher laser energy fluence. The effects of RT instabilities formation on the surface topography of the Fe thin films grown in pulsed laser deposition system are investigated (i) using different laser energy fluences for the same wavelength of laser radiation and (ii) using different laser wavelengths keeping the energy fluence fixed. It is concluded that the deposition achieved under turbulent condition leads to less smooth deposition surfaces with bigger sized particle agglomerates or network.

Mahmood, S. [National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616 (Singapore); Department of Physics, University of Karachi, Karachi 75270 (Pakistan); Rawat, R. S.; Wang, Y.; Lee, S.; Tan, T. L.; Springham, S. V.; Lee, P. [National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616 (Singapore); Zakaullah, M. [Department of Physics, Quaid-i-Azam University, 45320 Islamabad (Pakistan)

2012-10-15T23:59:59.000Z

500

Wide-Area Thermal Processing of Light-Emitting Materials  

Science Conference Proceedings (OSTI)

Silicon carbide based materials and devices have been successfully exploited for diverse electronic applications. However, they have not achieved the same success as Si technologies due to higher material cost and higher processing temperatures required for device development. Traditionally, SiC is not considered for optoelectronic applications because it has an indirect bandgap. However, AppliCote Associates, LLC has developed a laser-based doping process which enables light emission in SiC through the creation of embedded p-n junctions. AppliCote laser irradiation of silicon carbide allows two different interaction mechanisms: (1) Laser conversion or induced phase transformation which creates carbon rich regions that have conductive properties. These conductive regions are required for interconnection to the light emitting semiconducting region. (2) Laser doping which injects external dopant atoms into the substrate that introduces deep level transition states that emit light when electrically excited. The current collaboration with AppliCote has focused on the evaluation of ORNL's unique Pulse Thermal Processing (PTP) technique as a replacement for laser processing. Compared to laser processing, Pulse Thermal Processing can deliver similar energy intensities (20-50 kW/cm2) over a much larger area (up to 1,000 cm2) at a lower cost and much higher throughput. The main findings of our investigation; which are significant for the realization of SiC based optoelectronic devices, are as follows: (1) The PTP technique is effective in low thermal budget activation of dopants in SiC similar to the laser technique. The surface electrical conductivity of the SiC samples improved by about three orders of magnitude as a result of PTP processing which is significant for charge injection in the devices; (2) The surface composition of the SiC film can be modified by the PTP technique to create a carbon-rich surface (increased local C:Si ratio from 1:1 to 2.9:1). This is significant as higher thermal and electrical conductivities of the surface layer are critical for a successful development of integrated optoelectronic devices; and (3) PTP provides low thermal budget dopant activation with a controlled depth profile, which can be exploited for high performance device development with selective patterning of the substrate. This project has successfully demonstrated that a low thermal budget annealing technique, such as PTP, is critical to defining the path for low cost electronic devices integrated on glass or polymeric substrates. This project is complimentary to the goals of the Solid State Lighting Program within DOE. It involves new manufacturing techniques for light emitting materials that are potentially much lower cost and energy efficient than existing products. Significant opportunity exists for further exploration of AppliCote's material and device technology in combination with ORNL's PTP technique, modeling, and characterization capabilities.

Duty, C.; Quick, N. (AppliCote Associates, LLC)

2011-09-30T23:59:59.000Z