National Library of Energy BETA

Sample records for fino-chen hongyou lu

  1. Submitting Organization Hongyou Fan Sandia National Laboratories

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

     2007 R&D 100 Award Entry Form  Submitting Organization Hongyou Fan Sandia National Laboratories Advanced Materials Laboratory 1001 University Boulevard SE Albuquerque, NM 87106, USA 505-272-7128 (phone) 505-272-7336 (fax) hfan@sandia.gov AFFIRMATION: I affirm that all information submitted as a part of, or supplemental to, this entry is a fair and accurate represen- tation of this product. Submitter's signature_______________________________ Earl Stromberg Lockheed Martin

  2. LU

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

    LU ^ U >o Z o. LU 0£. □_ Q- Z C O O u < I z o O 3 f= < < _ Z Q £ LU z ID O Q - 0£. >- iu Z X HJ 2 s -Q _ - ^ U J t o r ^ LU "■ z .. d o lvS Q U T z Research w ith inelastic Neutron Scattering %o a t the NRU Reactor by - B.N. Brockhouse Q M c M a s t e r U n i v e r s i t y , H a m i l t o n , O n t a r i o < ^ O A.D.B. W o o d s , G. D ol li ng a n d I.M. Thorson "Z. Q C h a l k R i v e r N u c l e a r L a b o r a t o r i e s , A t o m i c E n e r g y o f C o n

  3. LU

    Office of Legacy Management (LM)

    I9 I LU ,2a,a1= #Au1 -. .- ,"# y-y"jA .b3- ' j _ ) a4~~I 3 OFFICIALUSE ONLY 6/m6 aa rh 7 - Ld * $c,rti AA-d w, AA CONTRACT NO. AT(&6)-924 THIS CONTRACT, entered into this / Lti day of ,- 1 -- ! r. --.7 m, effective as of the 1st day of Julytm between the UXITED STATES OF AMERICA (hereinafter called the llGover.nmentlf )- acting through the UNITED STATES AZWIC ENERGY CQWISSION (hereinafter called the Qzznissionn) and National Lead Company, Inc ., a corporation organized and existing

  4. Xun Lu | Photosynthetic Antenna Research Center

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

    Xun Lu Xun Lu Xun Lu Postdoctoral Research Associate E-mail: lux1@ornl.gov Website: Oak Ridge National Laboratory Postdoctoral Associates

  5. Yue Lu | Photosynthetic Antenna Research Center

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

    Yue Lu Yue Lu Yue Lu Graduate Student E-mail: luyue@wustl.edu Website: Washington University in St. Louis Graduate Students

  6. Jun Lu poster presentation 2012

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

    ... Nanoparticles: Application for Rechargeable Li-air Battery" Energy and Environ. Sci., Submitted. Jun Lu, et. al, "Synthesis of Porous Carbon Supported PdPdO Nanoparticles by ...

  7. Dr. Chenyang Lu | Photosynthetic Antenna Research Center

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

    Chenyang Lu November 8, 2013 Dr. Chenyang Lu Smart Building with Wireless Sensor Networks Published: November 8, 2013 As part of the Events & Topics in Bioenergy Series, Dr....

  8. Submitting Organization Hongyou Fan Sandia National Laboratories

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

    ... for instance, fabrication of the gold nanoparticlesilica nanocomposite (see ... involving hopping of electrons from one gold nanocrystal to another within the coating, ...

  9. Xiaonan Lu | Argonne National Laboratory

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

    Xiaonan Lu Postdoctoral Appointee Xiaonan Lu (S'12-M'13) received the B.E. and Ph.D. degrees in electrical engineering from Tsinghua University, Beijing, China, in 2008 and 2013, respectively. From 2010 to 2011, he was a guest Ph.D. Student with the Department of Energy Technology, Aalborg University, Aalborg, Denmark. From 2013 to 2014, he was a post-doctoral research associate with the Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN, USA. He is

  10. Postdoctoral Research Awards Annual Research Meeting: Jun Lu...

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

    Jun Lu Postdoctoral Research Awards Annual Research Meeting: Jun Lu Poster Presentation at 2012 EERE Annual Research Meeting, Postdoctoral Research Awards, from the U.S. Department ...

  11. LU

    Office of Legacy Management (LM)

    ... employee welfare and other plans or policies, all in accordance with Appendix '*A" hereto attached and hereby made a part of this contract. In case the full time of any employee ...

  12. jShyLU Scalable Hybrid Preconditioner and Solver

    Energy Science and Technology Software Center (OSTI)

    2012-09-11

    ShyLU is numerical software to solve sparse linear systems of equations. ShyLU uses a hybrid direct-iterative Schur complement method, and may be used either as a preconditioner or as a solver. ShyLU is parallel and optimized for a single compute Solver node. ShyLU will be a package in the Trilinos software framework.

  13. Lu an Group | Open Energy Information

    Open Energy Info (EERE)

    Name: Lu'an Group Place: Changzhi, Shanxi Province, China Zip: 46204 Product: A Chinese chemical and energy enterprise specialised in coal. Coordinates: 36.468231, 112.82312...

  14. MueLu Multigrid Preconditioning Package

    Energy Science and Technology Software Center (OSTI)

    2012-09-11

    MueLu is intended for the research and development of multigrid algorithms used in the solution of sparse linear systems arising from systems of partial differential equations. The software provides multigrid source code, test programs, and short example programs to demonstrate the various interfaces for creating, accessing, and applying the solvers. MueLu currently provides an implementation of smoothed aggregation algebraic multigrid method and interfaces to many commonly used smoothers. However, the software is intended to bemore » extensible, and new methods can be incorporated easily. MueLu also allows for advanced usage, such as combining multiple methods and segregated solves. The library supports point and block access to matrix data. All algorithms and methods in MueLu have been or will be published in the open scientific literature.« less

  15. Method for preparing high specific activity 177Lu

    DOE Patents [OSTI]

    Mirzadeh, Saed; Du, Miting; Beets, Arnold L.; Knapp, Jr., Furn F.

    2004-04-06

    A method of separating lutetium from a solution containing Lu and Yb, particularly reactor-produced .sup.177 Lu and .sup.177 Yb, includes the steps of: providing a chromatographic separation apparatus containing LN resin; loading the apparatus with a solution containing Lu and Yb; and eluting the apparatus to chromatographically separate the Lu and the Yb in order to produce high-specific-activity .sup.177 Yb.

  16. Hongyou Fan Chosen for Prestigious Lecture on Creating Nanomaterials

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

    ... the development of new synthesis methods and self-assembly processes to fabricate multifunctional nanomaterials for applications in nanoelectronics, photonics, and energy storage. ...

  17. Postdoctoral Research Awards Annual Research Meeting: Jun Lu | Department

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

    of Energy Jun Lu Postdoctoral Research Awards Annual Research Meeting: Jun Lu Poster Presentation at 2012 EERE Annual Research Meeting, Postdoctoral Research Awards, from the U.S. Department of Energy. luj_2012poster.pdf (495.97 KB) More Documents & Publications In Situ Characterizations of New Battery Materials and the Studies of High Energy Density Li-Air Batteries FY 2011 Annual Progress Report for Energy Storage R&D Vehicle Technologies Office Merit Review 2016: Efficient

  18. An overview of SuperLU: Algorithms, implementation, and userinterface

    SciTech Connect (OSTI)

    Li, Xiaoye S.

    2003-09-30

    We give an overview of the algorithms, design philosophy,and implementation techniques in the software SuperLU, for solving sparseunsymmetric linear systems. In particular, we highlight the differencesbetween the sequential SuperLU (including its multithreaded extension)and parallel SuperLU_DIST. These include the numerical pivoting strategy,the ordering strategy for preserving sparsity, the ordering in which theupdating tasks are performed, the numerical kernel, and theparallelization strategy. Because of the scalability concern, theparallel code is drastically different from the sequential one. Wedescribe the user interfaces ofthe libraries, and illustrate how to usethe libraries most efficiently depending on some matrix characteristics.Finally, we give some examples of how the solver has been used inlarge-scale scientific applications, and the performance.

  19. Performance analysis of parallel supernodal sparse LU factorization

    SciTech Connect (OSTI)

    Grigori, Laura; Li, Xiaoye S.

    2004-02-05

    We investigate performance characteristics for the LU factorization of large matrices with various sparsity patterns. We consider supernodal right-looking parallel factorization on a bi-dimensional grid of processors, making use of static pivoting. We develop a performance model and we validate it using the implementation in SuperLU-DIST, the real matrices and the IBM Power3 machine at NERSC. We use this model to obtain performance bounds on parallel computers, to perform scalability analysis and to identify performance bottlenecks. We also discuss the role of load balance and data distribution in this approach.

  20. Automatic Blocking Of QR and LU Factorizations for Locality

    SciTech Connect (OSTI)

    Yi, Q; Kennedy, K; You, H; Seymour, K; Dongarra, J

    2004-03-26

    QR and LU factorizations for dense matrices are important linear algebra computations that are widely used in scientific applications. To efficiently perform these computations on modern computers, the factorization algorithms need to be blocked when operating on large matrices to effectively exploit the deep cache hierarchy prevalent in today's computer memory systems. Because both QR (based on Householder transformations) and LU factorization algorithms contain complex loop structures, few compilers can fully automate the blocking of these algorithms. Though linear algebra libraries such as LAPACK provides manually blocked implementations of these algorithms, by automatically generating blocked versions of the computations, more benefit can be gained such as automatic adaptation of different blocking strategies. This paper demonstrates how to apply an aggressive loop transformation technique, dependence hoisting, to produce efficient blockings for both QR and LU with partial pivoting. We present different blocking strategies that can be generated by our optimizer and compare the performance of auto-blocked versions with manually tuned versions in LAPACK, both using reference BLAS, ATLAS BLAS and native BLAS specially tuned for the underlying machine architectures.

  1. Negative thermal expansion and anomalies of heat capacity of LuB50 at low temperatures

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

    Novikov, V. V.; Zhemoedov, N. A.; Matovnikov, A. V.; Mitroshenkov, N. V.; Kuznetsov, S. V.; Bud'ko, S. L.

    2015-07-20

    Heat capacity and thermal expansion of LuB50 boride were experimentally studied in the 2–300 K temperature range. The data reveal an anomalous contribution to the heat capacity at low temperatures. The value of this contribution is proportional to the first degree of temperature. It was identified that this anomaly in heat capacity is caused by the effect of disorder in the LuB50 crystalline structure and it can be described in the soft atomic potential model (SAP). The parameters of the approximation were determined. The temperature dependence of LuB50 heat capacity in the whole temperature range was approximated by the summore » of SAP contribution, Debye and two Einstein components. The parameters of SAP contribution for LuB50 were compared to the corresponding values for LuB66, which was studied earlier. Negative thermal expansion at low temperatures was experimentally observed for LuB50. The analysis of the experimental temperature dependence for the Gruneisen parameter of LuB50 suggested that the low-frequency oscillations, described in SAP mode, are responsible for the negative thermal expansion. As a result, the glasslike character of the behavior of LuB50 thermal characteristics at low temperatures was confirmed.« less

  2. Negative thermal expansion and anomalies of heat capacity of LuB 50 at low temperatures

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

    Novikov, V. V.; Zhemoedov, N. A.; Matovnikov, A. V.; Mitroshenkov, N. V.; Kuznetsov, S. V.; Bud'ko, S. L.

    2015-07-20

    Heat capacity and thermal expansion of LuB50 boride were experimentally studied in the 2300 K temperature range. The data reveal an anomalous contribution to the heat capacity at low temperatures. The value of this contribution is proportional to the first degree of temperature. It was identified that this anomaly in heat capacity is caused by the effect of disorder in the LuB50crystalline structure and it can be described in the soft atomic potential model (SAP). The parameters of the approximation were determined. The temperature dependence of LuB50 heat capacity in the whole temperature range was approximated by the sum ofmoreSAP contribution, Debye and two Einstein components. The parameters of SAP contribution for LuB50 were compared to the corresponding values for LuB66, which was studied earlier. Negative thermal expansion at low temperatures was experimentally observed for LuB50. The analysis of the experimental temperature dependence for the Gruneisen parameter of LuB50 suggested that the low-frequency oscillations, described in SAP mode, are responsible for the negative thermal expansion. Thus, the glasslike character of the behavior of LuB50 thermal characteristics at low temperatures was confirmed.less

  3. Intrinsic magnetic properties of hexagonal LuFeO{sub 3} and the effects of nonstoichiometry

    SciTech Connect (OSTI)

    Moyer, Jarrett A. E-mail: schlom@cornell.edu; Schiffer, Peter; Misra, Rajiv; Mundy, Julia A.; Brooks, Charles M.; Heron, John T.; Muller, David A.; Schlom, Darrell G. E-mail: schlom@cornell.edu

    2014-01-01

    We used oxide molecular-beam epitaxy in a composition-spread geometry to deposit hexagonal LuFeO{sub 3} (h-LuFeO{sub 3}) thin films with a monotonic variation in the Lu/Fe cation ratio, creating a mosaic of samples that ranged from iron rich to lutetium rich. We characterized the effects of composition variation with x-ray diffraction, atomic force microscopy, scanning transmission electron microscopy, and superconducting quantum interference device magnetometry. After identifying growth conditions leading to stoichiometric film growth, an additional sample was grown with a rotating sample stage. From this stoichiometric sample, we determined stoichiometric h-LuFeO{sub 3} to have a T{sub N} = 147 K and M{sub s} = 0.018 ?{sub B}/Fe.

  4. Langston University - High Energy Physics (LU-HEP)

    SciTech Connect (OSTI)

    Snow, Dr., Joel

    2012-08-13

    This final report is presented by Langston University (LU) for the project entitled "Langston University High Energy Physics" (LUHEP) under the direction of principal investigator (PI) and project director Professor Joel Snow. The project encompassed high energy physics research performed at hadron colliders. The PI is a collaborator on the DZero experiment at Fermi National Accelerator Laboratory in Batavia, IL, USA and the ATLAS experiment at CERN in Geneva, Switzerland and was during the entire project period from April 1, 1999 until May 14, 2012. Both experiments seek to understand the fundamental constituents of the physical universe and the forces that govern their interactions. In 1999 as member of the Online Systems group for Run 2 the PI developed a cross-platform Python-based, Graphical User Interface (GUI) application for monitoring and control of EPICS based devices for control room use. This served as a model for other developers to enhance and build on for further monitoring and control tasks written in Python. Subsequently the PI created and developed a cross-platform C++ GUI utilizing a networked client-server paradigm and based on ROOT, the object oriented analysis framework from CERN. The GUI served as a user interface to the Examine tasks running in the D\\O\\ control room which monitored the status and integrity of data taking for Run 2. The PI developed the histogram server/control interface to the GUI client for the EXAMINE processes. The histogram server was built from the ROOT framework and was integrated into the D\\O\\ framework used for online monitoring programs and offline analysis. The PI developed the first implementation of displaying histograms dynamically generated by ROOT in a Web Browser. The PI's work resulted in several talks and papers at international conferences and workshops. The PI established computing software infrastructure at LU and U. Oklahoma (OU) to do analysis of DZero production data and produce simulation data

  5. Precision dilatometry of Nb, Ta, and Lu tritides

    SciTech Connect (OSTI)

    Schober, T.; Dieker, C.; Lasser, R.; Trinkaus, H.

    1989-07-15

    Applying buoyancy dilatometry at room temperature toNbT/sub 0.0253/ and strain-gauge dilatometry at roomtemperature and 78 K to TaT/sub 0.0744/ andLuT/sub 0.15/, respectively, we have measured the swelling ofthese tritides due to the transmutation of T to /sup 3/He in the firsttwo years after T charging. For all three tritides almost linear swelling isfound, indicating approximately constant /sup 3/He densities inbubbles. The corresponding values for the volume requirement of a/sup 3/He atom in a bubble are around 8 A/sup 3/.Associated pressure values are derived with the aid of an equation of state for/sup 3/He adapted to recent high-pressure x-ray-diffractionmeasurements on solid /sup 4/He. With increasing /sup 3/Heconcentration the pressure seems to converge to about 0.2 of the shear modulusof the metal, in accordance with recent theoretical results concerning thethreshold pressure for dislocation-loop punching by bubbles.

  6. Raman and structural characterization of LuAlO{sub 3}

    SciTech Connect (OSTI)

    Casu, Alberto; Ricci, Pier Carlo

    2011-11-15

    The structural and vibrational properties of lutetium orthoaluminate perovskite (LuAlO{sub 3}) were investigated by means of Raman spectroscopy and EXAFS measurements. The analysis of Raman spectra taken in four different polarized configurations along the principal axes at 20 K and room temperature conditions permits to assign the principal vibrational modes in LuAP single crystals and to confirm the belonging to the D{sub 2h}{sup 16} space group. EXAFS measurements were performed at room temperature in order to obtain local structural informations on the first and next nearest neighbors around lutetium absorptions sites. Unit cell parameters and bond lengths were determined by the analysis of the EXAFS spectroscopy at the L{sub 3} absorption edge of lutetium. The informations thus gathered on this compound can offer a useful addition in the framework of a full structural characterization of LuAlO{sub 3}. - Graphical abstract: Raman active mode in LuAP crystal. Highlights: > Structural characterization of LuAlO{sub 3} is obtained by Raman and EXAFS spectroscopies. > Vibrational modes, temperature-dependent variations studied by Raman spectroscopy. > Cell parameters and local characterization obtained by EXAFS spectroscopy.

  7. Negative thermal expansion and anomalies of heat capacity of LuB50 at low temperatures

    SciTech Connect (OSTI)

    Novikov, V. V.; Zhemoedov, N. A.; Matovnikov, A. V.; Mitroshenkov, N. V.; Kuznetsov, S. V.; Bud'ko, S. L.

    2015-07-20

    Heat capacity and thermal expansion of LuB50 boride were experimentally studied in the 2–300 K temperature range. The data reveal an anomalous contribution to the heat capacity at low temperatures. The value of this contribution is proportional to the first degree of temperature. It was identified that this anomaly in heat capacity is caused by the effect of disorder in the LuB50 crystalline structure and it can be described in the soft atomic potential model (SAP). The parameters of the approximation were determined. The temperature dependence of LuB50 heat capacity in the whole temperature range was approximated by the sum of SAP contribution, Debye and two Einstein components. The parameters of SAP contribution for LuB50 were compared to the corresponding values for LuB66, which was studied earlier. Negative thermal expansion at low temperatures was experimentally observed for LuB50. The analysis of the experimental temperature dependence for the Gruneisen parameter of LuB50 suggested that the low-frequency oscillations, described in SAP mode, are responsible for the negative thermal expansion. As a result, the glasslike character of the behavior of LuB50 thermal characteristics at low temperatures was confirmed.

  8. YingYing Lu > Postdoc - Stanford University > Center Alumni > The Energy

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

    Materials Center at Cornell YingYing Lu Postdoc - Stanford University yl854@stanford.edu Formerly a graduate student with the Archer Group, she received her PhD in 2014. She is now a postdoc in Materials Science and Engineering at Stanford

  9. Kinetic control of structural and magnetic states in LuBaCo4O7.

    SciTech Connect (OSTI)

    Avci, S.; Chmaissem, O.; Zheng, H.; Huq, A.; Khalyavin, D.; Stephens, P.; Suchomel, M.; Manuel, P.; Mitchell, J.

    2012-01-01

    The RBaCo{sub 4}O{sub 7} (R = Ca, Y, Tb, Ho, Tm, Yb, Lu) compounds provide a novel topology for studying the competition between triangular geometry and magnetic order. Here, we report the structural and magnetic behavior of the Lu member of this series via neutron and synchrotron x-ray diffraction, magnetization, and resistivity measurements. We determined sequential phase transitions and a strong competition between a stable and a metastable low-temperature state that critically depends on controlled cooling rates and the associated heat removal kinetics. No evidence for long-range ordered magnetism was detected by neutron diffraction at any temperature. However, very slow spin dynamics are evidenced by time-dependent neutron diffraction measurements and can be explained by several competing magnetic phases with incommensurate short-range correlations coexisting in this material.

  10. Jahn-Teller versus quantum effects in the spin-orbital material LuVO3

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

    Skoulatos, M.; Toth, S.; Roessli, B.; Enderle, M.; Habicht, K.; Sheptyakov, D.; Cervellino, A.; Freeman, P. G.; Reehuis, M.; Stunault, A.; et al

    2015-04-13

    In this article, we report on combined neutron and resonant x-ray scattering results, identifying the nature of the spin-orbital ground state and magnetic excitations in LuVO3 as driven by the orbital parameter. In particular, we distinguish between models based on orbital-Peierls dimerization, taken as a signature of quantum effects in orbitals, and Jahn-Teller distortions, in favor of the latter. In order to solve this long-standing puzzle, polarized neutron beams were employed as a prerequisite in order to solve details of the magnetic structure, which allowed quantitative intensity analysis of extended magnetic-excitation data sets. The results of this detailed study enabledmore » us to draw definite conclusions about the classical versus quantum behavior of orbitals in this system and to discard the previous claims about quantum effects dominating the orbital physics of LuVO3 and similar systems.« less

  11. SuperLU{_}DIST: A scalable distributed-memory sparse direct solver for unsymmetric linear systems

    SciTech Connect (OSTI)

    Li, Xiaoye S.; Demmel, James W.

    2002-03-27

    In this paper, we present the main algorithmic features in the software package SuperLU{_}DIST, a distributed-memory sparse direct solver for large sets of linear equations. We give in detail our parallelization strategies, with focus on scalability issues, and demonstrate the parallel performance and scalability on current machines. The solver is based on sparse Gaussian elimination, with an innovative static pivoting strategy proposed earlier by the authors. The main advantage of static pivoting over classical partial pivoting is that it permits a priori determination of data structures and communication pattern for sparse Gaussian elimination, which makes it more scalable on distributed memory machines. Based on this a priori knowledge, we designed highly parallel and scalable algorithms for both LU decomposition and triangular solve and we show that they are suitable for large-scale distributed memory machines.

  12. On the photoelectron velocity-map imaging of lutetium monoxide anion LuO{sup ?}

    SciTech Connect (OSTI)

    Liu, Zhiling; Xie, Hua; Qin, Zhengbo; Cong, Ran; Wu, Xia; Tang, Zichao, E-mail: zctang@dicp.ac.cn; Fan, Hongjun, E-mail: fanhj@dicp.ac.cn [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)] [State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Li, Quanjiang [School of Physics and Optoelectronic Technology, and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024 (China)] [School of Physics and Optoelectronic Technology, and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024 (China)

    2014-01-21

    We report a combined photoelectron velocity-map imaging spectroscopy and density functional theory investigation on lutetium monoxide anion. Transition between the X {sup 1}?{sup +} anion electronic ground state and the neutral X {sup 2}?{sup +} electronic ground state is observed. Vibrationally resolved spectra were obtained at four different photon energies, providing a wealth of spectroscopic information for the electronic ground states of the anionic lutetium monoxide and corresponding neutral species. Franck-Condon simulations of the ground-state transition are performed to assign vibrational structure in the spectra and to assist in identifying the observed spectral bands. The electronic ground state of LuO{sup ?} is found to have a vibrational frequency of 743 10 cm{sup ?1} and an equilibrium bond length of 1.841 . The electron affinity of LuO is measured to be 1.624 0.002 eV. The fundamental frequency of ground-state LuO is estimated to be 839 10 cm{sup ?1}.

  13. An In-Depth Analysis of the Chung-Lu Model

    SciTech Connect (OSTI)

    Winlaw, M.; DeSterck, H.; Sanders, G.

    2015-10-28

    In the classic Erd}os R enyi random graph model [5] each edge is chosen with uniform probability and the degree distribution is binomial, limiting the number of graphs that can be modeled using the Erd}os R enyi framework [10]. The Chung-Lu model [1, 2, 3] is an extension of the Erd}os R enyi model that allows for more general degree distributions. The probability of each edge is no longer uniform and is a function of a user-supplied degree sequence, which by design is the expected degree sequence of the model. This property makes it an easy model to work with theoretically and since the Chung-Lu model is a special case of a random graph model with a given degree sequence, many of its properties are well known and have been studied extensively [2, 3, 13, 8, 9]. It is also an attractive null model for many real-world networks, particularly those with power-law degree distributions and it is sometimes used as a benchmark for comparison with other graph generators despite some of its limitations [12, 11]. We know for example, that the average clustering coe cient is too low relative to most real world networks. As well, measures of a nity are also too low relative to most real-world networks of interest. However, despite these limitations or perhaps because of them, the Chung-Lu model provides a basis for comparing new graph models.

  14. Lu{sub 2}O{sub 3}:Eu{sup 3+} glass ceramic films: Synthesis, structural and spectroscopic studies

    SciTech Connect (OSTI)

    Carrera Jota, M.L.; Garca Murillo, A.; Morales Ramrez, A. de J.; Rosa Cruz, E. de la; Kassiba, Abdelhadi

    2014-03-01

    Graphical abstract: - Highlights: Lu{sub 2}O{sub 3}:Eu{sup 3+}@SiO{sub 2} films were synthesized by solgel and by dip-coating technique. Effects of incorporating PVP on structural properties were studied. Effects of incorporating silica (SiO{sub 2}) luminescence characteristics were analyzed. X-ray diffraction results showed that Lu{sub 2}O{sub 3}:Eu{sup 3+}@SiO{sub 2} crystallizes at 700 C. The 611 nm emission for the Lu:Si = 8:1 system presented an improvement. - Abstract: For the first time, transparent and crack free europium-doped lutetia silica solgel films were synthesized using the dip-coating technique on silica quartz substrates. In this study, we examined the effects of incorporating polyvinylpyrrolidone (PVP) and silica (SiO{sub 2}) into different precursor solutions for different LuSi molar ratios: 4:1, 6:1, 8:1 and 10:1. Different systems, such as Lu{sub 2}O{sub 3}:Eu{sup 3+}@SiO{sub 2} (using the above Lu:Si molar ratios), were synthesized by solgel and by dip-coating technique, employing acetylacetonate lutetium and tetraethylorthosilicate as Lu and Si precursors, in order to produce Lu{sub 2}O{sub 3}:Eu{sup 3+} (5 mol%)@SiO{sub 2} glassceramic films. The film microstructure was studied by microRaman spectroscopy (MRS) and X-ray diffraction (XRD) for different Lu:Si molar ratios on films annealed at 700 C. X-ray diffraction results showed that the lutetium oxide cubic phase crystallizes in the silica matrix at 700 C, and the crystallite size of Lu{sub 2}O{sub 3}:Eu{sup 3+}@SiO{sub 2} films varies from 5 nm to 17 nm according to the respective Lu:Si molar ratios. Opto-geometrical parameters determined by m-lines spectroscopy using a 632.5 nm HeNe laser showed that the Eu{sup 3+} doped films heat-treated at 700 C presented a thickness and density of 1.7 ?m (8.8 g cm{sup ?3}), 970 nm (9.2 g cm{sup ?3}), 1 ?m (9.3 g cm{sup ?3}) and 1.3 ?m (9.25 g cm{sup ?3}) for the Lu:Si = 4:1, 6:1, 8:1 and 10:1 molar ratio systems, respectively

  15. Comparative efficacy of 177Lu and 90Y for Anti-CD20 Pretargeted Radioimmunotherapy in Murine Lymphoma Xenograft Models

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

    Frost, Sofia H. L.; Frayo, Shani L.; Miller, Brian W.; Orozco, Johnnie J.; Booth, Garrett C.; Hylarides, Mark D.; Lin, Yukang; Green, Damian J.; Gopal, Ajay K.; Pagel, John M.; et al

    2015-03-18

    Purpose Pretargeted radioimmunotherapy (PRIT) is a multi-step method of selectively delivering high doses of radiotherapy to tumor cells while minimizing exposure to surrounding tissues. Yttrium-90 (90Y) and lutetium-177 (177Lu) are two of the most promising beta-particle emitting radionuclides used for radioimmunotherapy, which despite having similar chemistries differ distinctly in terms of radiophysical features. These differences may have important consequences for the absorbed dose to tumors and normal organs. Whereas 90Y has been successfully applied in a number of preclinical and clinical radioimmunotherapy settings, there have been few published pretargeting studies with 177Lu. We therefore compared the therapeutic potential of targetingmore » either 90Y or 177Lu to human B-cell lymphoma xenografts in mice. Methods Parallel experiments evaluating the biodistribution, imaging, dosimetry, therapeutic efficacy, and toxicity were performed in female athymic nude mice bearing either Ramos (Burkitt lymphoma) or Granta (mantle cell lymphoma) xenografts, utilizing an anti-CD20 antibodystreptavidin conjugate (1F5-SA) and an 90Y- or 177Lu-labeled 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA)-biotin second step reagent. Results The two radionuclides displayed comparable biodistributions in tumors and normal organs; however, the absorbed radiation dose delivered to tumor was more than twice as high for 90Y (1.3 Gy/MBq) as for 177Lu (0.6 Gy/MBq). More importantly, therapy with 90Y-DOTAbiotin was dramatically more effective than with 177Lu-DOTA-biotin, with 100% of Ramos xenograft-bearing mice cured with 37 MBq 90Y, whereas 0% were cured using identical amounts of 177Lu-DOTA-biotin. Similar results were observed in mice bearing Granta xenografts, with 80% of the mice cured with 90Y-PRIT and 0% cured with 177Lu-PRIT. Toxicities were comparable with both isotopes. Conclusion 90Y was therapeutically superior to 177Lu for streptavidin-biotin PRIT

  16. Direct band gaps in multiferroic h-LuFeO{sub 3}

    SciTech Connect (OSTI)

    Holinsworth, B. S.; Mazumdar, D.; Musfeldt, J. L.; Brooks, C. M.; Mundy, J. A.; Das, H.; Fennie, C. J.; Cherian, J. G.; McGill, S. A.; Schlom, D. G.

    2015-02-23

    We measured the optical properties of epitaxial thin films of the metastable hexagonal polymorph of LuFeO{sub 3} by absorption spectroscopy, magnetic circular dichroism, and photoconductivity. Comparison with complementary electronic structure calculations reveals a 1.1 eV direct gap involving hybridized Fe 3d{sub z{sup 2}}+O 2p{sub z}→Fe d excitations at the Γ and A points, with a higher energy direct gap at 2.0 eV. Both charge gaps nicely overlap the solar spectrum.

  17. Lu1-xI3:Cex--A Scintillator for gamma ray spectroscopy and time-of-flight PET

    DOE Patents [OSTI]

    Shah, Kanai S.

    2009-03-17

    The present invention concerns very fast scintillator materials comprising lutetium iodide doped with Cerium Lu.sub.1-xI.sub.3:Ce.sub.x; LuI.sub.3:Ce). The LuI.sub.3 scintillator material has surprisingly good characteristics including high light output, high gamma ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration. The timing resolution of the scintillators of the present invention provide compositions capable of resolving the position of an annihilation event within a portion of a human body cross-section.

  18. Magnetization dynamics and frustration in the multiferroic double perovskite Lu2MnCoO6

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

    Zapf, Vivien S.; Ueland, B. G.; Laver, Mark; Lonsky, Martin; Pohlit, Merlin; Muller, Jens; Lancaster, Tom; Moller, Johannes S.; Blundell, Stephen J.; Singleton, John; et al

    2016-04-29

    Here, we investigate the magnetic ordering and the magnetization dynamics (from kHz to THz time scales) of the double perovskite Lu2MnCoO6 using elastic neutron diffraction, muon spin relaxation, and micro-Hall magnetization measurements. This compound is known to be a type II multiferroic with the interesting feature that a ferromagneticlike magnetization hysteresis loop couples to an equally hysteretic electric polarization in the bulk of the material despite a zero-field magnetic ordering of the type ↑↑↓↓ along Co-Mn spin chains. Here we explore the unusual dynamics of this compound and find extremely strong fluctuations, consistent with the axial next-nearest-neighbor Ising (ANNNI) modelmore » for frustrated spin chains. We identify three temperature scales in Lu2MnCoO6 corresponding to the onset of highly fluctuating long-range order below TN = 50±3 K identified from neutron scattering, the onset of magnetic and electric hysteresis, with change in kHz magnetic and electric dynamics below a 30 K temperature scale, and partial freezing of ~MHz spin fluctuations in the muon spin relaxation data below 12 ± 3 K. Our results provide a framework for understanding the multiferroic behavior of this compound and its hysteresis and dynamics.« less

  19. Sub-10 nm lanthanide doped BaLuF{sub 5} nanocrystals: Shape controllable synthesis, tunable multicolor emission and enhanced near-infrared upconversion luminescence

    SciTech Connect (OSTI)

    Rao, Ling; Lu, Wei; Wang, Haibo; Yi, Zhigao; Zeng, Songjun; Li, Zheng

    2015-04-15

    Highlights: • Sub-10 nm cubic phase BaLuF{sub 5} nanocrystals were synthesized by a hydrothermal method for the first time. • Tunable multicolor from yellow to yellow-green was achieved by controlling Gd{sup 3+} content in BaLuF{sub 5}:Yb/Er system. • Intense near-infrared upconversion luminescence in BaLuF{sub 5}:Gd/Yb/Tm nanocrystal. • The enhancement near-infrared luminescence can be realized by adjusting the content of Gd{sup 3+} in BaLuF{sub 5}:Gd/Yb/Tm system. - Abstract: In this study, sub-10 nm BaLuF{sub 5} nanocrystals with cubic phase structure were synthesized by a solvothermal method using oleic acid as the stabilizing agent. The as-prepared BaLuF{sub 5} nanocrystals were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and analyzed by the upconversion (UC) spectra. The TEM results reveal that these samples present high uniformity. Compared with Gd-free samples, the size of BaLuF{sub 5}:Yb/Er doped with 10% Gd{sup 3+} decreased to 5.6 nm. In addition, BaLuF{sub 5}:Yb/Tm/Gd upconversion nanoparticles (UCNPs) presented efficient near-infrared (NIR)-NIR UC luminescence. Therefore, it is expected that these ultra-small BaLuF{sub 5} nanocrystals with well-controlled shape, size, and UC emission have potential applications in biomedical imaging fields.

  20. Lu.sub.1-xI.sub.3:Ce.sub.x-a scintillator for gamma-ray spectroscopy and time-of-flight pet

    DOE Patents [OSTI]

    Shah, Kanai S.

    2008-02-12

    The present invention includes very fast scintillator materials including lutetium iodide doped with Cerium (Lu.sub.1-xI.sub.3:Ce.sub.x; LuI.sub.3:Ce). The LuI.sub.3 scintillator material has surprisingly good characteristics including high light output, high gamma-ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma-ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration.

  1. 57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

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

    Ma, Xiaoming; Ran, Sheng; Pang, Hua; Li, Fashen; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-08-01

    With the advent of Fe–As based superconductivity it has become important to study how superconductivity manifests itself in details of 57Fe Mössbauer spectroscopy of conventional, Fe-bearing superconductors. The iron-based superconductor Lu2Fe3Si5 has been studied by 57Fe Mössbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (Tc=6.1 K). Consistent with the two crystallographic sites for Fe in this structure, the observed spectra appear to have a pattern consisting of two doublets over the whole temperature range. Furthermore, the value of Debye temperature was estimated from temperaturemore » dependence of the isomer shift and the total spectral area and compared with the specific heat capacity data. Neither abnormal behavior of the hyperfine parameters at or near Tc, nor phonon softening were observed.« less

  2. Helical antiferromagnetic ordering in Lu1-xScxMnSi

    SciTech Connect (OSTI)

    Goetsch, Ryan J; Anand, V K; Johnston, David C

    2014-08-01

    Polycrystalline samples of Lu1?xScxMnSi (x=0, 0.25, 0.5) are studied using powder x-ray diffraction, heat capacity Cp, magnetization, magnetic susceptibility ?, and electrical resistivity ? measurements versus temperature T and magnetic field H. This system crystallizes in the primitive orthorhombic TiNiSi-type structure (space group Pnma) as previously reported. The ?(T) data indicate metallic behavior. The Cp(T), ?(T), and ?(T) measurements consistently indicate long-range antiferromagnetic (AF) transitions with AF ordering temperatures TN=246, 215, and 188 K for x=0, 0.25, and 0.5, respectively. A second transition is observed at somewhat lower T for each sample from the ?(T) and ?(T) measurements, which we speculate are due to spin reorientation transitions; these second transitions are completely suppressed in H=5.5 T. The Cp data below 10 K for each composition indicate an enhanced Sommerfeld electronic heat capacity coefficient for the series in the range ?=2429 mJ/mol K2. The ?(T) measurements up to 1000 K were fitted by local-moment Curie-Weiss behaviors which indicate a low Mn spin S?1. The ? data below TN are analyzed using the Weiss molecular field theory for a planar noncollinear cycloidal AF structure with a composition-dependent pitch, following the previous neutron diffraction work of Venturini et al. [J. Alloys Compd. 256, 65 (1997)]. Within this model, the fits indicate a turn angle between Mn ordered moments along the cycloid axis of ?100? or ?145?, either of which indicate dominant AF interactions between the Mn spins in the Lu1?xScxMnSi series of compounds.

  3. Materials and Electrical Characterization of Physical Vapor Deposited LaxLu1-xO3 Thin Films on 300 mm Silicon

    SciTech Connect (OSTI)

    L Edge; T Vo; V Paruchuri; R Iijima; J Bruley; J Jordan-Sweet; B Linder; A Kellock; T Tsunoda; S Shinde

    2011-12-31

    La{sub x}Lu{sub 1-x}O{sub 3} thin films were deposited on 300 mm silicon wafers by physical vapor deposition and fabricated into field-effect transistors using a gate-first process flow. The films were characterized using transmission electron microscopy, Rutherford backscattering spectrometry, and synchrotron x-ray diffraction. The results show the films remain amorphous even at temperatures of 1000 C. The dielectric properties of La{sub x}Lu{sub 1-x}O{sub 3} (0.125 {<=} x {<=} 0.875) thin films were evaluated as a function of film composition. The amorphous La{sub x}Lu{sub 1-x}O{sub 3} thin films have a dielectric constant (K) of 23 across the composition range. The inversion thickness (T{sub inv}) of the La{sub x}Lu{sub 1-x}O{sub 3} thin films was scaled to <1.0 nm.

  4. Fabrication and microstructure of cerium doped lutetium aluminum garnet (Ce:LuAG) transparent ceramics by solid-state reaction method

    SciTech Connect (OSTI)

    Li, Junlang; Xu, Jian; Shi, Ying; Qi, Hongfang; Xie, Jianjun; Lei, Fang

    2014-07-01

    Highlights: We fabricate Ce doped lutetium aluminum garnet ceramics by solid-state method. The raw materials include Lu{sub 2}O{sub 3} nanopowders synthesized by co-precipitation method. The density of the transparent ceramics reach 99.7% of the theoretical value. The optical transmittance of the bulk ceramic at 550 nm was 57.48%. Some scattering centers decrease the optical characteristic of the ceramic. - Abstract: Polycrystalline Ce{sup 3+} doped lutetium aluminum garnet (Ce:LuAG) transparent ceramics fabricated by one step solid-state reaction method using synthetic nano-sized Lu{sub 2}O{sub 3}, commercial ?-Al{sub 2}O{sub 3} and CeO{sub 2} powders were investigated in this paper. The green compacts shaped by the mixed powders were successfully densified into Ce:LuAG transparent ceramics after vacuum sintering at 1750 C for 10 h. The in-line optical transmittance of the Ce:LuAG ceramic made by home-made Lu{sub 2}O{sub 3} powders could reach 57.48% at 550 nm, which was higher than that of the ceramic made by commercial Lu{sub 2}O{sub 3} powders (22.96%). The microstructure observation showed that light scattering centers caused by micro-pores, aluminum segregation and refraction index inhomogeneities induced the decrease of optical transparency of the Ce:LuAG ceramics, which should be removed and optimized in the future work.

  5. 57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

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

    Ma, Xiaoming; Ran, Sheng; Pang, Hua; Li, Fashen; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-03-28

    With the advent of Fe–As based superconductivity it has become important to study how superconductivity manifests itself in details of 57Fe Mössbauer spectroscopy of conventional, Fe-bearing superconductors. The iron-based superconductor Lu2Fe3Si5 has been studied by 57Fe Mössbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (Tc=6.1 K). Furthermore, consistent with the two crystallographic sites for Fe in this structure, the observed spectra appear to have a pattern consisting of two doublets over the whole temperature range. The value of Debye temperature was estimated from temperaturemore » dependence of the isomer shift and the total spectral area and compared with the specific heat capacity data. As a result, neither abnormal behavior of the hyperfine parameters at or near Tc, nor phonon softening were observed.« less

  6. Comparative efficacy of 177Lu and 90Y for Anti-CD20 Pretargeted Radioimmunotherapy in Murine Lymphoma Xenograft Models

    SciTech Connect (OSTI)

    Frost, Sofia H. L.; Frayo, Shani L.; Miller, Brian W.; Orozco, Johnnie J.; Booth, Garrett C.; Hylarides, Mark D.; Lin, Yukang; Green, Damian J.; Gopal, Ajay K.; Pagel, John M.; Bck, Tom A.; Fisher, Darrell R.; Press, Oliver W.; Afrin, Farhat

    2015-03-18

    Purpose Pretargeted radioimmunotherapy (PRIT) is a multi-step method of selectively delivering high doses of radiotherapy to tumor cells while minimizing exposure to surrounding tissues. Yttrium-90 (90Y) and lutetium-177 (177Lu) are two of the most promising beta-particle emitting radionuclides used for radioimmunotherapy, which despite having similar chemistries differ distinctly in terms of radiophysical features. These differences may have important consequences for the absorbed dose to tumors and normal organs. Whereas 90Y has been successfully applied in a number of preclinical and clinical radioimmunotherapy settings, there have been few published pretargeting studies with 177Lu. We therefore compared the therapeutic potential of targeting either 90Y or 177Lu to human B-cell lymphoma xenografts in mice. Methods Parallel experiments evaluating the biodistribution, imaging, dosimetry, therapeutic efficacy, and toxicity were performed in female athymic nude mice bearing either Ramos (Burkitt lymphoma) or Granta (mantle cell lymphoma) xenografts, utilizing an anti-CD20 antibodystreptavidin conjugate (1F5-SA) and an 90Y- or 177Lu-labeled 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA)-biotin second step reagent. Results The two radionuclides displayed comparable biodistributions in tumors and normal organs; however, the absorbed radiation dose delivered to tumor was more than twice as high for 90Y (1.3 Gy/MBq) as for 177Lu (0.6 Gy/MBq). More importantly, therapy with 90Y-DOTAbiotin was dramatically more effective than with 177Lu-DOTA-biotin, with 100% of Ramos xenograft-bearing mice cured with 37 MBq 90Y, whereas 0% were cured using identical amounts of 177Lu-DOTA-biotin. Similar results were observed in mice bearing Granta xenografts, with 80% of the mice cured with 90Y-PRIT and 0

  7. Lu.sub.1-xI.sub.3:Ce.sub.x--a scintillator for gamma ray spectroscopy and time-of-flight PET

    DOE Patents [OSTI]

    Shah, Kanai S.

    2007-02-06

    The present invention concerns very fast scintillator materials comprising lutetium iodide doped with Cerium (Lu.sub.1-xI.sub.3:Ce.sub.x; LuI.sub.3:Ce). The LuI.sub.3 scintillator material has surprisingly good characteristics including high light output, high gamma ray stopping efficiency, fast response, low cost, good proportionality, and minimal afterglow that the material is useful for gamma ray spectroscopy, medical imaging, nuclear and high energy physics research, diffraction, non-destructive testing, nuclear treaty verification and safeguards, and geological exploration. The timing resolution of the scintillators of the present invention provide compositions capable of resolving the position of an annihilation event within a portion of a human body cross-section.

  8. Evolution of electronic states in the Kondo alloy system Yb{sub 1{minus}x}Lu{sub x}B{sub 12}

    SciTech Connect (OSTI)

    Susaki, T.; Konishi, T.; Sekiyama, A.; Mizokawa, T.; Fujimori, A.; Iwasaki, T.; Ueda, S.; Matsushita, T.; Suga, S.; Ishii, H.; Iga, F.; Kasaya, M.

    1997-12-01

    We have studied the effect of Lu substitution on the Kondo insulator YbB{sub 12} by high-resolution photoemission. Comparison of the spectra of YbB{sub 12}, Yb{sub 0.5}Lu{sub 0.5}B{sub 12}, and LuB{sub 12} reveals that the density of states (DOS) of the B sp-derived conduction band near the Fermi level is reduced in YbB{sub 12} over a rather wide ({approximately} 40 meV) energy region. Lu substitution (i) recovers the reduced B sp DOS, (ii) shifts the Yb 4f-derived Kondo peak towards higher binding energy, and (iii) decreases the Yb valence. These results are consistently analyzed using the Anderson-impurity model, and imply interaction between the Yb 4f ions mediated by the Yb 4f-B sp hybridization in YbB{sub 12}. {copyright} {ital 1997} {ital The American Physical Society}

  9. Study of 57 Fe Mössbauer effect in RFe2Zn20 ( R = Lu, Yb, Gd)

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

    Bud’ko, Sergey L.; Kong, Tai; Ma, Xiaoming; Canfield, Paul C.

    2015-08-04

    In this document we report measurements of 57Fe Mössbauer spectra for RFe2Zn20 (R = Lu, Yb, Gd) from ~ 4.5 K to room temperature. The obtained isomer shift values are very similar for all three compounds, their temperature dependence was analyzed within the Debye model and resulted in an estimate of the Debye temperatures of 450-500 K. The values of quadrupole splitting at room temperature change with the cubic lattice constant a in a linear fashion. For GdFe2Zn20, ferromagnetic order is seen as an appearance of a sextet in the spectra. The 57Fe site hyperfine field for T → 0more » was evaluated to be ~ 2.4 T.« less

  10. On the effective implementation of a boundary element code on graphics processing units unsing an out-of-core LU algorithm

    SciTech Connect (OSTI)

    D'Azevedo, Ed F; Nintcheu Fata, Sylvain

    2012-01-01

    A collocation boundary element code for solving the three-dimensional Laplace equation, publicly available from \\url{http://www.intetec.org}, has been adapted to run on an Nvidia Tesla general purpose graphics processing unit (GPU). Global matrix assembly and LU factorization of the resulting dense matrix were performed on the GPU. Out-of-core techniques were used to solve problems larger than available GPU memory. The code achieved over eight times speedup in matrix assembly and about 56~Gflops/sec in the LU factorization using only 512~Mbytes of GPU memory. Details of the GPU implementation and comparisons with the standard sequential algorithm are included to illustrate the performance of the GPU code.

  11. Temperature dependence of the radiation tolerance of nanocrystalline pyrochlores A2Ti2O7 (A = Gd, Ho and Lu)

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

    Wen, J.; Sun, C.; Dholabhai, P. P.; Xia, Y.; Tang, M.; Chen, D.; Yang, D. Y.; Li, Y. H.; Uberuaga, B. P.; Wang, Y. Q.

    2016-03-21

    A potentially enhanced radiation resistance of nanocrystalline materials, as a consequence of the high density of interfaces and surfaces, has attracted much attention both to understand the fundamental role of these defect sinks and to develop them for high-radiation environments. Here, irradiation response of nanocrystalline A2Ti2O7 (A = Gd, Ho and Lu) pyrochlore powders with grain sizes of 20–30 nm was investigated by 1-MeV Kr2+ ion bombardment. In situ transmission electron microscopy (TEM) revealed that the critical amorphization fluence for each nanocrystalline compound at room temperature was greater than that for their coarse-grained counterparts, indicating an enhanced amorphization resistance. Themore » effect of temperature on the irradiation response of one of these compounds, nanocrystalline Lu2Ti2O7, was further examined by performing ion irradiation at an elevated temperature range of 480–600 K. The critical amorphization temperature (Tc) was found to be noticeably higher in nanocrystalline Lu2Ti2O7 (610 K) than its coarse-grained counterpart (480 K), revealing that nanocrystalline Lu2Ti2O7 is less resistant to amorphization compared to its coarse-grained phase under high temperatures. We interpret these results with the aid of atomistic simulations. Molecular statics calculations find that cation antisite defects are less energetically costly to form near surfaces than in the bulk, suggesting that the nanocrystalline form of these materials is generally less susceptible to amorphization than coarse-grained counterparts at low temperatures where defect kinetics are negligible. In contrast, at high temperatures, the annealing efficiency of antisite defects by cation interstitials is significantly reduced due to the sink properties of the surfaces in the nanocrystalline pyrochlore, which contributes to the observed higher amorphization temperature in the nano-grained phase than in coarse-grained counterpart. Altogether, these results provide new

  12. Sci—Thur AM: YIS - 03: irtGPUMCD: a new GPU-calculated dosimetry code for {sup 177}Lu-octreotate radionuclide therapy of neuroendocrine tumors

    SciTech Connect (OSTI)

    Montégiani, Jean-François; Gaudin, Émilie; Després, Philippe; Jackson, Price A.; Beauregard, Jean-Mathieu

    2014-08-15

    In peptide receptor radionuclide therapy (PRRT), huge inter-patient variability in absorbed radiation doses per administered activity mandates the utilization of individualized dosimetry to evaluate therapeutic efficacy and toxicity. We created a reliable GPU-calculated dosimetry code (irtGPUMCD) and assessed {sup 177}Lu-octreotate renal dosimetry in eight patients (4 cycles of approximately 7.4 GBq). irtGPUMCD was derived from a brachytherapy dosimetry code (bGPUMCD), which was adapted to {sup 177}Lu PRRT dosimetry. Serial quantitative single-photon emission computed tomography (SPECT) images were obtained from three SPECT/CT acquisitions performed at 4, 24 and 72 hours after {sup 177}Lu-octreotate administration, and registered with non-rigid deformation of CT volumes, to obtain {sup 177}Lu-octreotate 4D quantitative biodistribution. Local energy deposition from the β disintegrations was assumed. Using Monte Carlo gamma photon transportation, irtGPUMCD computed dose rate at each time point. Average kidney absorbed dose was obtained from 1-cm{sup 3} VOI dose rate samples on each cortex, subjected to a biexponential curve fit. Integration of the latter time-dose rate curve yielded the renal absorbed dose. The mean renal dose per administered activity was 0.48 ± 0.13 Gy/GBq (range: 0.30–0.71 Gy/GBq). Comparison to another PRRT dosimetry code (VRAK: Voxelized Registration and Kinetics) showed fair accordance with irtGPUMCD (11.4 ± 6.8 %, range: 3.3–26.2%). These results suggest the possibility to use the irtGPUMCD code in order to personalize administered activity in PRRT. This could allow improving clinical outcomes by maximizing per-cycle tumor doses, without exceeding the tolerable renal dose.

  13. Structural characterization of Lu{sub 1.8}Y{sub 0.2}SiO{sub 5} crystals

    SciTech Connect (OSTI)

    Chiriu, Daniele; Faedda, Nicola; Lehmann, Alessandra Geddo; Ricci, Pier Carlo; Anedda, Alberto; Desgreniers, Serge; Fortin, Emery

    2007-08-01

    The structural and vibrational properties of Lu{sub 1.8}Y{sub 0.2}SiO{sub 5} (LYSO) single crystals were investigated by means of Raman spectroscopy and x-ray diffraction measurements. Unit cell parameters and bond lengths were determined by Rietveld refinement of the collected x-ray diffraction powder spectra. By comparison with the vibrational spectra of the parent compounds Lu{sub 2}SiO{sub 5} and Y{sub 2}SiO{sub 5} and by using polarized Raman measurements, we propose the assignment of the principal vibrational modes of LYSO crystals. The strict connection of Raman spectra of the LYSO solid solution and of the pure lutetium and yttrium crystals, as well as the analysis of the polarized measurements, confirms that LYSO structure adopts the C2/c space group symmetry. The structural analogies of LYSO with the pure compound Lu{sub 2}SiO{sub 5} are further shown by means of high pressure Raman spectroscopy, and the possibility of considering the LYSO crystal analogous to the LSO structure with a tensile stress between 0.25 and 0.80 GPa is discussed.

  14. Location of trivalent lanthanide dopant energy levels in (Lu{sub 0.5}Gd{sub 0.5}){sub 2}O{sub 3}

    SciTech Connect (OSTI)

    Retot, H.; Viana, B.; Bessiere, A.; Galtayries, A.

    2011-06-15

    The location of Ln{sup 3+} dopant energy levels relative to bands in (Lu{sub 0.5}Gd{sub 0.5}){sub 2}O{sub 3} was studied. A several-steps analysis of XPS measurements on heavy lanthanides sesquioxides Ln{sub 2}O{sub 3} (Ln = Gd, Tb, Dy, Er, Tm, Yb, Lu) and on Sc{sub 2}O{sub 3} and Y{sub 2}O{sub 3} reference materials were used to locate Ln{sup 3+} dopant ground state relative to the top of the valence band in (Lu{sub 0.5}Gd{sub 0.5}){sub 2}O{sub 3} within an error bar of {+-}0.4 eV. The agreement between XPS data and model was found improved relative to previous studies. When compared to XPS analysis, prediction based on optical absorption shows a slight underestimation attributed to the lack of precision in Ce{sup 4+} charge transfer band measurement.

  15. Observation of a topologically non-trivial surface state in half-Heusler PtLuSb (001) thin films

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

    Logan, J. A.; Patel, S. J.; Harrington, S. D.; Polley, C. M.; Schultz, B. D.; Balasubramanian, T.; Janotti, A.; Mikkelsen, A.; Palmstrøm, C. J.

    2016-06-27

    The discovery of topological insulators, materials with bulk band gaps and protected cross-gap surface states in compounds such as Bi2Se3, has generated much interest in identifying topological surface states (TSSs) in other classes of materials. In particular, recent theoretical calculations suggest that TSSs may be found in half-Heusler ternary compounds. If experimentally realizable, this would provide a materials platform for entirely new heterostructure spintronic devices that make use of the structurally identical but electronically varied nature of Heusler compounds. Here we show the presence of a TSS in epitaxially grown thin films of the half-Heusler compound PtLuSb. Spin- and angle-resolvedmore » photoemission spectroscopy, complemented by theoretical calculations, reveals a surface state with linear dispersion and a helical tangential spin texture consistent with previous predictions. As a result, this experimental verification of topological behavior is a significant step forward in establishing half-Heusler compounds as a viable material system for future spintronic devices.« less

  16. NMR shielding and spin–rotation constants of {sup 175}LuX (X = {sup 19}F, {sup 35}Cl, {sup 79}Br, {sup 127}I) molecules

    SciTech Connect (OSTI)

    Demissie, Taye B.

    2015-12-31

    This presentation demonstrates the relativistic effects on the spin-rotation constants, absolute nuclear magnetic resonance (NMR) shielding constants and shielding spans of {sup 175}LuX (X = {sup 19}F, {sup 35}Cl, {sup 79}Br, {sup 127}I) molecules. The results are obtained from calculations performed using density functional theory (non-relativistic and four-component relativistic) and coupled-cluster calculations. The spin-rotation constants are compared with available experimental values. In most of the molecules studied, relativistic effects make an order of magnitude difference on the NMR absolute shielding constants.

  17. Growth and luminescent properties of scintillators based on the single crystalline films of Lu{sub 3−x}Gd{sub x}Al{sub 5}O{sub 12}:Ce garnet

    SciTech Connect (OSTI)

    Zorenko, Yu; Gorbenko, V.; Vasylkiv, Ja; Zelenyj, A.; Fedorov, A.; Kucerkova, R.; Mares, J.A.; Nikl, M.; Bilski, P.; Twardak, A.

    2015-04-15

    Highlights: • Single crystalline films of Lu{sub 3−x}Gd{sub x}Al{sub 5}O{sub 12} garnets at x = 0 ÷ 3.0 were grown by LPE method onto YAG substrates. • Lattice constant of Lu{sub 3−}Gd{sub x}Al{sub 5}O{sub 12}:Ce film and the misfit m between films and YAG substrate changed linearly with increasing of Gd content. • Effective Gd{sup 3+}–Ce{sup 3+} energy transfer occurs in the Lu{sub 3−x}Gd{sub x}Al{sub 5}O{sub 12}:Ce films. • Best scintillation light yield is observed in the Lu{sub 3}Al{sub 5}O{sub 12}:Ce and Lu{sub 2.4}Gd{sub 0.6}Al{sub 5}O{sub 12}:Ce films. • Increase of the Gd content in x = 1.5–2.5 range results in decreasing the scintillation LY of Lu{sub 3−x}Gd{sub x}Al{sub 5}O{sub 12}:Ce films. - Abstract: The work is related to the growth of scintillators based on the single crystalline films (SCF) of Ce{sup 3+} doped Lu{sub 3−}Gd{sub x}Al{sub 5}O{sub 12} mixed rare-earth garnets by Liquid Phase Epitaxy (LPE) method. We have shown, that full set of Lu{sub 3−}Gd{sub x}Al{sub 5}O{sub 12} SCFs with x values ranging from 0 to 3.0 can be successfully crystallized by the LPE method onto Y{sub 3}Al{sub 5}O{sub 12} (YAG) substrates from the melt-solutions based on PbO-B{sub 2}O{sub 3} flux. The absorption, X-ray excited luminescence, photoluminescence, thermoluminescence and light yield measurements, the latter under excitation by α-particles of {sup 239}Pu and {sup 241}Am radioisotopes, were applied for their characterization.

  18. Optical and magneto-optical properties of single crystals of RFe{sub 2} (R = Gd, Tb, Ho, and Lu) and GdCo{sub 2} intermetallic compounds

    SciTech Connect (OSTI)

    Lee, S.J.

    1999-02-12

    The author has studied the diagonal and off-diagonal optical conductivity of RFe{sub 2}(R = Gd, Tb, Ho, Lu) and GdCo{sub 2} single crystals grown by the flux method. Using spectroscopic ellipsometry the author has measured the dielectric function from 1.5 to 5.5 eV. The magneto-optical Kerr spectrometer at temperatures between 7 and 295 K and applied magnetic fields between 0.5 to 1.6 T. The apparatus and calibration method are described in detail. Using magneto-optical data and optical constants he derives the experimental value of the off-diagonal conductivity components. Theoretical calculations of optical conductivities and magneto-optical parameters were performed using the tight binding-linear muffin tin orbitals method within the local spin density approximation. He applied this TB-LMTO method to LuFe{sub 2}. The theoretical results obtained agree well with the experimental data. The oxidation effects on the diagonal part of the optical conductivity were considered using a three-phase model. The oxidation effects on the magneto-optical parameters were also considered by treating the oxide layer as a nonmagnetic thin transparent layer. These corrections change not only the magnitude but also the shape of the optical conductivity and the magneto-optical parameters.

  19. Superconducting order parameter in nonmagnetic borocarbides RNi₂B₂C (R=Y, Lu) probed by point-contact Andreev reflection spectroscopy

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

    Lu, X.; Park, W. K.; Yeo, S.; Oh, K.-H.; Lee, S.-I.; Bud’ko, S. L.; Canfield, P. C.; Greene, L. H.

    2011-03-25

    We report on the measurements of the superconducting order parameter in the nonmagnetic borocarbides LuNi₂B₂C and YNi₂B₂C. Andreev conductance spectra are obtained from nanoscale metallic junctions on single crystal surfaces prepared along three major crystallographic orientations: [001], [110], and [100]. The gap values extracted by the single-gap Blonder-Tinkham-Klapwijk model follow the theoretical predictions as a function of temperature and magnetic field and exhibit a small anisotropy with no indication of proposed gap nodes along the [100] and [010] directions. These observations are robust and reproducible among all the measurements on two different sets of LuNi₂B₂C crystals and one set ofmore » YNi₂B₂C crystals. We suggest that the possible gap nodes in the [100] direction may be masked by two effects: different gap anisotropy across multiple Fermi surfaces, as reported in the recent photoemission spectroscopy, and the large tunneling cone. Our results provide a consistent picture of the superconducting gap structure in these materials, addressing the controversy particularly in the reported results of point-contact Andreev reflection spectroscopy.« less

  20. Optimizing white light luminescence in Dy{sup 3+}-doped Lu{sub 3}Ga{sub 5}O{sub 12} nano-garnets

    SciTech Connect (OSTI)

    Haritha, P.; Linganna, K.; Venkatramu, V.; Martn, I. R.; Monteseguro, V.; Rodrguez-Mendoza, U. R.; Babu, P.; Len-Luis, S. F.; Jayasankar, C. K.; Lavn, V.

    2014-11-07

    Trivalent dysprosium-doped Lu{sub 3}Ga{sub 5}O{sub 12} nano-garnets have been prepared by sol-gel method and characterized by X-ray powder diffraction, high-resolution transmission electron microscopy, dynamic light scattering, and laser excited spectroscopy. Under a cw 457?nm laser excitation, the white luminescence properties of Lu{sub 3}Ga{sub 5}O{sub 12} nano-garnets have been studied as a function of the optically active Dy{sup 3+} ion concentration and at low temperature. Decay curves for the {sup 4}F{sub 9/2} level of Dy{sup 3+} ion exhibit non-exponential nature for all the Dy{sup 3+} concentrations, which have been well-fitted to a generalized energy transfer model for a quadrupole-quadrupole interaction between Dy{sup 3+} ions without diffusion. From these data, a simple rate-equations model can be applied to predict that intense white luminescence could be obtained from 1.8?mol% Dy{sup 3+} ions-doped nano-garnets, which is in good agreement with experimental results. Chromaticity color coordinates and correlated color temperatures have been determined as a function of temperature and are found to be within the white light region for all Dy{sup 3+} concentrations. These results indicate that 2.0?mol% Dy{sup 3+} ions doped nano-garnet could be useful for white light emitting device applications.

  1. Formation of medical radioisotopes {sup 111}In, {sup 117m}Sn, {sup 124}Sb, and {sup 177}Lu in photonuclear reactions

    SciTech Connect (OSTI)

    Danagulyan, A. S.; Hovhannisyan, G. H. Bakhshiyan, T. M.; Avagyan, R. H.; Avetisyan, A. E.; Kerobyan, I. A.; Dallakyan, R. K.

    2015-06-15

    The possibility of the photonuclear production of radioisotopes {sup 111}In, {sup 117m}Sn, {sup 124}Sb, and {sup 177}Lu is discussed. Reaction yields were measured by the gamma-activation method. The enriched tin isotopes {sup 112,} {sup 118}Sn and Te and HfO{sub 2} of natural isotopic composition were used as targets. The targets were irradiated at the linear electron accelerator of Alikhanian National Science Laboratory (Yerevan) at the energy of 40 MeV. The experimental results obtained in this way reveal that the yield and purity of radioisotopes {sup 111}In and {sup 117}mSn are acceptable for their production via photonuclear reactions. Reactions proceeding on targets from Te and HfO{sub 2} of natural isotopic composition and leading to the formation of {sup 124}Sb and {sup 177}Lu have small yields and are hardly appropriate for the photoproduction of these radioisotopes even in the case of enriched targets.

  2. 3d-4f spin interaction and field-induced metamagnetism in RCrO{sub 4} (R?=?Ho, Gd, Lu) compounds

    SciTech Connect (OSTI)

    Midya, A.; Khan, N.; Bhoi, D.; Mandal, P.

    2014-05-07

    We observe that the zircon-type RCrO{sub 4} (R?=?Ho, Gd, Lu) compounds exhibit complicated magnetic properties and large magnetic entropy change due to the strong competition between ferromagnetic and antiferromagnetic interactions. For a field change of 7?T, the maximum values of entropy change and refrigerant capacity reach 28?J?kg{sup ?1}?K{sup ?1} and 740?J?kg{sup ?1}, respectively, for GdCrO{sub 4} whereas the corresponding values for HoCrO{sub 4} are 29?J?kg{sup ?1}?K{sup ?1} and 550?J?kg{sup ?1}. For GdCrO{sub 4} compound, the magnetic entropy change is quite large even at low temperatures well below the ferromagnetic transition.

  3. Intermediate valence in single crystals of (Lu{sub 1?x}Y b{sub x}){sub 3}Rh{sub 4}Ge{sub 13} (0 ? x ? 1)

    SciTech Connect (OSTI)

    Rai, Binod K.; Morosan, E.

    2015-04-01

    Single crystals of (Lu{sub 1?x}Y b{sub x}){sub 3}Rh{sub 4}Ge{sub 13} were characterized by magnetization, specific heat, and electrical resistivity measurements. Doping Yb into the non-magnetic Lu{sub 3}Rh{sub 4}Ge{sub 13} compound tunes this cubic systems properties from a superconductor with disordered metal normal state (x < 0.05) to a Kondo for 0.05 ? x ?0.2 and intermediate valence at the highest Yb concentrations. The evidence for intermediate Yb valence comes from a broad maximum in the magnetic susceptibility and X-ray photoelectron spectroscopy. Furthermore, the resistivity displays a local maximum at finite temperatures at intermediate compositions x, followed by apparent metallic behavior closest to the Yb end compound in the series.

  4. Synthesis, properties and phase transitions of pyrochlore- and fluorite-like Ln{sub 2}RMO{sub 7} (Ln = Sm, Ho; R = Lu, Sc; M = Nb, Ta)

    SciTech Connect (OSTI)

    Shlyakhtina, A.V.; Belov, D.A.; Pigalskiy, K.S.; Shchegolikhin, A.N.; Kolbanev, I.V.; Karyagina, O.K.

    2014-01-01

    Graphical abstract: Temperature dependences of bulk conductivity for Sm{sub 2}ScTaO{sub 7} pyrochlore prepared at (1) 1400 °C, 20 h; and (2) 1200 °C, 40 h. - Highlights: • The phase formation of Ln{sub 2}RMO{sub 7} (Ln = Sm, Ho; R = Lu, Sc; M = Nb, Ta) at 1200–1600 °C. • The bulk conductivity and magnetic susceptibility were measured. • The bulk conductivity of Sm{sub 2}ScTaO{sub 7} has oxygen ion type at T ≥ 750 °C. • The first-order structural phase transition was observed in Sm{sub 2}ScTaO{sub 7} at ∼650–700 °C. • This phase transformation is not typical for defect fluorites. - Abstract: We have studied the new compounds with fluorite-like (Ho{sub 2}RNbO{sub 7} (R = Lu, Sc)) and pyrochlore-like (Sm{sub 2}ScTaO{sub 7}) structure as potential oxide ion conductors. The phase formation process (from 1200 to 1600 °C) and physical properties (electrical, thermo mechanical, and magnetic) for these compounds were investigated. Among the niobate materials the highest bulk conductivity is offered by the fluorite-like Ho{sub 2}ScNbO{sub 7} synthesized at 1600 °C: 3.8 × 10{sup −5} S/cm at 750 °C, whereas in Sm system the highest bulk conductivity, 7.3 × 10{sup −6} S/cm at 750 °C, is offered by the pyrochlore Sm{sub 2}ScTaO{sub 7} synthesized at 1400 °C. In Sm{sub 2}ScTaO{sub 7} pyrochlore we have observed the first-order phase transformation at ∼650–700 °C is related to rearrangement process in the oxygen sublattice of the pyrochlore structure containing B-site cations in different valence state and actually is absent in the defect fluorites. The two holmium niobates show Curie–Weiss paramagnetic behavior, with the prevalence of antiferromagnetic coupling. The magnetic susceptibility of Sm{sub 2}ScTaO{sub 7} is a weak function of temperature, corresponding to Van Vleck paramagnetism.

  5. Pressure dependence of electronic states in secondary explosives...

    Office of Scientific and Technical Information (OSTI)

    Abstract not provided. Authors: Farrow, Darcie ; Kohl, Ian Thomas ; Fan, Hongyou ; Knepper, Robert ; Marquez, Michael P. ; Kearney, Sean Patrick ; Kay, Jeffrey J Publication Date: ...

  6. Templated photocatalytic synthesis of well-defined Pt hollow...

    Office of Scientific and Technical Information (OSTI)

    Abstract not provided. Authors: Fan, Hongyou ; Bai, Feng ; Wu, Huimeng ; Xiao, Xiaoyin ; Haddadd, Raid ; Sun, Zaicheng Publication Date: 2011-03-01 OSTI Identifier: 1109053 Report ...

  7. Discussion on 'characteristics of fly ashes from full-scale coal-fired power plants and their relationship to mercury adsorption' by Lu et al.

    SciTech Connect (OSTI)

    James C. Hower; Bruno Valentim; Irena J. Kostova; Kevin R. Henke

    2008-03-15

    Mercury capture by coal-combustion fly ash is a function of the amount of Hg in the feed coal, the amount of carbon in the fly ash, the type of carbon in the fly ash (including variables introduced by the rank of the feed coal), and the flue gas temperature at the point of ash collection. In their discussion of fly ash and Hg adsorption, Lu et al. (Energy Fuels 2007, 21, 2112-2120) had some fundamental flaws in their techniques, which, in turn, impact the validity of analyzed parameters. First, they used mechanical sieving to segregate fly ash size fractions. Mechanical sieving does not produce representative size fractions, particularly for the finest sizes. If the study samples were not obtained correctly, the subsequent analyses of fly ash carbon and Hg cannot accurately represent the size fractions. In the analysis of carbon forms, it is not possible to accurately determine the forms with scanning electron microscopy. The complexity of the whole particles is overlooked when just examining the outer particle surface. Examination of elements such as Hg, present in very trace quantities in most fly ashes, requires careful attention to the analytical techniques. 36 refs., 3 figs., 1 tab.

  8. IUPAC-NIST Solubility Data Series. 100. Rare Earth Metal Fluorides in Water and Aqueous Systems. Part 3. Heavy Lanthanides (GdLu)

    SciTech Connect (OSTI)

    Mioduski, Tomasz; Gumi?ski, Cezary; Zeng, Dewen

    2015-06-15

    This is the third part of the volume devoted to solubility data for the rare earth metal (REM) fluorides in water and in aqueous ternary and multicomponent systems. It covers experimental results of trivalent fluorides of Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu (so-called heavy lanthanides), since no quantitative data on solubilities of TbF{sub 4} and YbF{sub 2} (the most stable compounds at these valencies) are available. The related literature has been covered through the end of 2014. Compilations of all available papers with the solubility data are introduced for each REM fluoride with a corresponding critical evaluation. Every such assessment contains a collection of all solubility results in aqueous solution, a selection of suggested solubility data, a solubility equation, and a brief discussion of the multicomponent systems. Only simple fluorides (no complexes or double salts) are treated as the input substances in this report. General features of the systems, such as nature of the equilibrium solid phases, solubility as a function of temperature, influence of ionic strength, solution pH, mixed solvent medium on the solubility, quality of the solubility results, and the solubility as a function of REM atomic number, have already been presented in Part 1 of the volume.

  9. Crystal Chemistry and Luminescence of Ce3+ -Doped Lu2CaMg2(Si,Ge)3O12 and Its Use in LED Based Lighting

    SciTech Connect (OSTI)

    Setlur,A.; Heward, W.; Gao, Y.; Srivastava, A.; Chandron, R.; Shankar, M.

    2006-01-01

    In this paper, we describe the formation and luminescence of a new garnet phosphor for light emitting diode (LED) based lighting, Lu{sub 2}CaMg{sub 2}(Si,Ge){sub 3}O{sub 12}:Ce{sup 3+}.The regions for garnet phase formation are initially described with respect to larger rare earth substitution and show reasonable correlation to previous crystal chemistry studies for the garnet parent structure. While the pure silicate phosphor also has apatite second phases, a significant amount of Ce{sup 3+} enters the garnet phase, giving Ce{sup 3+} luminescence that is significantly redder when compared to typical Al{sup 3+} garnet phosphors with quantum efficiencies comparable to commercial Ce{sup 3+} garnet phosphors. Potential reasons for the emission red shift and the high quantum efficiency are discussed. Finally, the performance of these new phosphors is tested within LED based lamps. Lamps using these phosphors can reach color temperatures required for general illumination lighting and also have comparable phosphor conversion efficiencies when compared to lamps using typical garnet phosphors.

  10. Synchrotron X-ray diffraction and Raman spectroscopy of Ln{sub 3}NbO{sub 7} (Ln=La, Pr, Nd, Sm-Lu) ceramics obtained by molten-salt synthesis

    SciTech Connect (OSTI)

    Siqueira, K.P.F.; Soares, J.C.; Granado, E.; Bittar, E.M.; Paula, A.M. de; Moreira, R.L.; Dias, A.

    2014-01-15

    Ln{sub 3}NbO{sub 7} (Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) ceramics were obtained by molten-salt synthesis and their structures were systematically investigated by synchrotron X-ray diffraction (SXRD), second harmonic generation (SHG) and Raman spectroscopy. It was observed that ceramics with the largest ionic radii (La, Pr, Nd) crystallized into the Pmcn space group, while the ceramics with intermediate ionic radii (Sm-Gd) exhibited a different crystal structure belonging to the Ccmm space group. For this last group of ceramics, this result was corroborated by SHG and Raman scattering and ruled out any possibility for the non-centrosymmetric C 222{sub 1} space group, solving a recent controversy in the literature. Finally, according to SXRD, Tb-Lu containing samples exhibited an average defect fluorite structure (Fm3{sup ¯}m space group). Nonetheless, broad scattering at forbidden Bragg reflections indicates the presence of short-range domains with lower symmetry. Vibrational spectroscopy showed the presence of six Raman-active modes, inconsistent with the average cubic fluorite structure, and in line with the existence of lower-symmetry nano-domains immersed in the average fluorite structure of these ceramics. - Graphical abstract: Raman spectrum for Sm{sub 3}NbO{sub 7} ceramics showing their 27 phonon modes adjusted through Lorentzian lines. According to synchrotron X-ray diffraction and Raman scattering, this material belongs to the space group Cmcm. Display Omitted - Highlights: • Ln{sub 3}NbO{sub 7} ceramics were obtained by molten-salt synthesis. • SXRD, SHG and Raman scattering confirmed orthorhombic and cubic structures. • Ccmm instead of C222{sub 1} is the correct structure for Sm–Gd ceramics. • Pmcn space group was confirmed for La-, Pr- and Nd-based ceramics. • For Tb–Lu ceramics, ordered domains of a pyrochlore structure were observed.

  11. Zifeng Lu | Argonne National Laboratory

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

    and tropospheric ozone assessment and the UNECE report on hemispheric transport of air pollution (HTAP). Telephone 630-252-9853 Fax 630-252-8007 E-mail zlu@anl.gov Website Google ...

  12. Monodisperse and core-shell structured SiO{sub 2}-Lu{sub 2}O{sub 3}:Ln{sup 3+} (Ln=Eu, Tb, Dy, Sm, Er, Ho, and Tm) spherical particles: A facile synthesis and luminescent properties

    SciTech Connect (OSTI)

    Xu, Zhenhe; Feng, Bin; Bian, Shasha; Liu, Tao; Wang, Mingli; Gao, Yu; Sun, Di; Gao, Xin; Sun, Yaguang

    2012-12-15

    The core-shell structured SiO{sub 2}-Lu{sub 2}O{sub 3}:Ln{sup 3+} particles were realized by coating the Lu{sub 2}O{sub 3}:Ln{sup 3+} phosphors onto the surface of non-aggregated, monodisperse and spherical SiO{sub 2} particles by the Pechini sol-gel method. The as-synthesized products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray (EDX) spectra, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), photolumiminescence (PL), and low-voltage cathodoluminescence (CL). The results indicate that the 800 Degree-Sign C annealed sample consists of crystalline Lu{sub 2}O{sub 3} shells and amorphous SiO{sub 2} cores, in spherical shape with a narrow size distribution. The as-obtained particles show strong light emission with different colors corresponding to different Ln{sup 3+} ions under ultraviolet-visible light excitation and low-voltage electron beams excitation, which have potential applications in fluorescent lamps and field emission displays. - Graphical Abstract: Representative SEM and TEM images of the core-shell structured SiO{sub 2}-Lu{sub 2}O{sub 3}:Eu{sup 3+} particles; CIE chromaticity diagram showing the emission colors for SiO{sub 2}-Lu{sub 2}O{sub 3}:Ln{sup 3+}; Multicolor emissions of SiO{sub 2}-Lu{sub 2}O{sub 3}:Ln{sup 3+} particles. Highlights: Black-Right-Pointing-Pointer The core-shell particles were realized by coating the phosphors onto the surface of SiO{sub 2} particles. Black-Right-Pointing-Pointer The sample consists of crystalline Lu{sub 2}O{sub 3} shells and amorphous SiO{sub 2} cores. Black-Right-Pointing-Pointer The particles show different light emission colors corresponding to Ln{sup 3+} ions. Black-Right-Pointing-Pointer They have potential applications in fluorescent lamps and field emission displays.

  13. Structural and magnetic properties of pyrochlore solid solutions (Y,Lu){sub 2}Ti{sub 2-x}(Nb,Ta){sub x}O{sub 7{+-}}{sub y}

    SciTech Connect (OSTI)

    West, D.V. McQueen, T.M.; Huang, Q.; Cava, R.J.

    2008-08-15

    The synthesis and characterization of the pyrochlore solid solutions, Y{sub 2}Ti{sub 2-x}Nb{sub x}O{sub 7-y}, Lu{sub 2}Ti{sub 2-x}Nb{sub x}O{sub 7-y}, Y{sub 2}Ti{sub 2-x}Ta{sub x}O{sub 7-y} and Lu{sub 2}TiTaO{sub 7-y} (-0.4Lu){sub 2}Ti{sub 2-x}(Nb,Ta){sub x}O{sub 7{+-}}{sub y} under high vacuum at 1600 deg. C results in oxygen deficient, paramagnetic compounds with reduced B-site cations. Studies indicate Ti{sup 3+} as the source of the localized moments, with no evidence for localized Nb{sup 4+} moments. Annealing under O{sub 2} results in fully oxidized, oxygen excess pyrochlores as white powders. Powder neutron diffraction studies show the excess oxygen on the normally vacant 8a site.

  14. ESR of Gd{sup 3+} in the Kondo-lattice compound YbAgCu{sub 4} and its reference compounds RAgCu{sub 4} (R=Y,Lu)

    SciTech Connect (OSTI)

    Pagliuso, P.G.; Rettori, C.; Oseroff, S.B.; Sarrao, J.; Fisk, Z.; Cornelius, A.; Hundley, M.F.

    1997-10-01

    Low-temperature (T{lt}30thinspK) electron-spin-resonance (ESR) experiments of Gd{sup 3+} diluted in the Kondo-lattice compound YbAgCu{sub 4} and its reference compounds YAgCu{sub 4} and LuAgCu{sub 4} are interpreted in terms of an enhanced density of states at the Fermi level for the Yb-based compound. The results of susceptibility and ESR (Korringa rate and g-shift) measurements show negligible electron-electron exchange enhancement for all the studied compounds. The exchange interaction between the Gd{sup 3+} local moment and the conduction electrons (c-e) is c-e wave vector dependent in all three compounds. {copyright} {ital 1997} {ital The American Physical Society}

  15. Study of 57 Fe Mössbauer effect in RFe2Zn20 ( R = Lu, Yb, Gd)

    SciTech Connect (OSTI)

    Bud’ko, Sergey L.; Kong, Tai; Ma, Xiaoming; Canfield, Paul C.

    2015-08-04

    In this document we report measurements of 57Fe Mössbauer spectra for RFe2Zn20 (R = Lu, Yb, Gd) from ~ 4.5 K to room temperature. The obtained isomer shift values are very similar for all three compounds, their temperature dependence was analyzed within the Debye model and resulted in an estimate of the Debye temperatures of 450-500 K. The values of quadrupole splitting at room temperature change with the cubic lattice constant a in a linear fashion. For GdFe2Zn20, ferromagnetic order is seen as an appearance of a sextet in the spectra. The 57Fe site hyperfine field for T → 0 was evaluated to be ~ 2.4 T.

  16. New rare-earth metal germanides with bismuth substitution. Synthesis, structural variations, and magnetism of the RE[Bi{sub x}Ge{sub 1-x}]{sub 2} (RE=Y, Pr, Nd, Sm, Gd-Tm, Lu) compounds

    SciTech Connect (OSTI)

    Zhang, Jiliang; Hmiel, Benjamin; Antonelli, Anthony; Tobash, Paul H.; Bobev, Svilen; Saha, Shanta; Kirshenbaum, Kevin; Greene, Richard L.; Paglione, Johnpierre

    2012-12-15

    Single-crystals of the novel rare-earth metal-bismuth digermanides with idealized formula RE[Bi{sub x}Ge{sub 1-x}]{sub 2} (RE=Y, Pr, Nd, Sm, Gd-Tm, Lu; x<0.16(1)) have been obtained using the Bi-flux technique. Their structures have been established by single-crystal X-ray diffraction; they can be divided into three classes, closely related to the ZrSi{sub 2} structure with the space group Cmcm (no. 63). The structural relationship and the variations with the type of the rare-earth metal have been explored and discussed. Temperature-dependent magnetization measurements on the single-crystals reveal magnetic behavior, which have been rationalized based on the mean-field theory. At cryogenic temperatures, the localized 4f electrons in most of the compounds exhibit antiferromagnetic ordering, mediated by the conduction electrons via Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange interactions. - Graphical abstract: This paper details the synthesis and the structural characterization of an extended series of rare-earth metal-bismuth-germanides RE[Bi{sub x}Ge{sub 1-x}]{sub 2} (RE=Y, Pr-Sm, Gd-Tm, Lu). They crystallize with the same extended symmetry (space group Cmcm), but with three distinct structures, which are closely related. Magnetization measurements show low-temperature antiferromagnetic ordering. RE[Bi{sub x}Ge{sub 1-x}]{sub 2} are the first compounds between these elements. Highlights: Black-Right-Pointing-Pointer RE[Bi{sub x}Ge{sub 1-x}]{sub 2} (RE=rare-earth metal) are the first compounds of the respective elements. Black-Right-Pointing-Pointer Their structures are closely related. Black-Right-Pointing-Pointer Three structures can be distinguished based on the packing of the REGe{sub 6} triangular prisms. Black-Right-Pointing-Pointer All compounds show low-temperature antiferromagnetic ordering.

  17. Absolute NMR shielding scales and nuclear spin–rotation constants in {sup 175}LuX and {sup 197}AuX (X = {sup 19}F, {sup 35}Cl, {sup 79}Br and {sup 127}I)

    SciTech Connect (OSTI)

    Demissie, Taye B. Komorovsky, Stanislav; Repisky, Michal; Ruud, Kenneth; Jaszuński, Michał

    2015-10-28

    We present nuclear spin–rotation constants, absolute nuclear magnetic resonance (NMR) shielding constants, and shielding spans of all the nuclei in {sup 175}LuX and {sup 197}AuX (X = {sup 19}F, {sup 35}Cl, {sup 79}Br, {sup 127}I), calculated using coupled-cluster singles-and-doubles with a perturbative triples (CCSD(T)) correction theory, four-component relativistic density functional theory (relativistic DFT), and non-relativistic DFT. The total nuclear spin–rotation constants determined by adding the relativistic corrections obtained from DFT calculations to the CCSD(T) values are in general in agreement with available experimental data, indicating that the computational approach followed in this study allows us to predict reliable results for the unknown spin–rotation constants in these molecules. The total NMR absolute shielding constants are determined for all the nuclei following the same approach as that applied for the nuclear spin–rotation constants. In most of the molecules, relativistic effects significantly change the computed shielding constants, demonstrating that straightforward application of the non-relativistic formula relating the electronic contribution to the nuclear spin–rotation constants and the paramagnetic contribution to the shielding constants does not yield correct results. We also analyze the origin of the unusually large absolute shielding constant and its relativistic correction of gold in AuF compared to the other gold monohalides.

  18. 57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

    SciTech Connect (OSTI)

    Ma, Xiaoming; Ran, Sheng; Pang, Hua; Li, Fashen; Canfield, Paul C.; Bud'ko, Sergey L.

    2015-03-28

    With the advent of Fe–As based superconductivity it has become important to study how superconductivity manifests itself in details of 57Fe Mössbauer spectroscopy of conventional, Fe-bearing superconductors. The iron-based superconductor Lu2Fe3Si5 has been studied by 57Fe Mössbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (Tc=6.1 K). Furthermore, consistent with the two crystallographic sites for Fe in this structure, the observed spectra appear to have a pattern consisting of two doublets over the whole temperature range. The value of Debye temperature was estimated from temperature dependence of the isomer shift and the total spectral area and compared with the specific heat capacity data. As a result, neither abnormal behavior of the hyperfine parameters at or near Tc, nor phonon softening were observed.

  19. Asian American Engineer of the Year honors three Sandia Employees

    Broader source: Energy.gov [DOE]

    Hongyou Fan, Ming Lau and Rekha Rao, scientists at Sandia National Laboratories, have received the Asian American Engineer of the Year Award (AAEOY), Sandia reported today. They are among 19 people...

  20. Preparation and spectroscopic properties of rare-earth (RE) (RE = Sm, Eu, Tb, Dy, Tm)-activated K{sub 2}LnZr(PO{sub 4}){sub 3} (Ln = Y, La, Gd and Lu) phosphate in vacuum ultraviolet region

    SciTech Connect (OSTI)

    Zhang, Zhi-Jun; Lin, Xiao; Graduate School of Chinese Academy of Science, Beijing, 100039 ; Zhao, Jing-Tai; Zhang, Guo-Bin

    2013-02-15

    Graphical abstract: Display Omitted Highlights: ? We report the VUV spectroscopic properties of rare-earth ions in K{sub 2}LnZr(PO{sub 4}){sub 3}. ? The O{sup 2?}-Eu{sup 3+} charge transfer bands at about 220 nm have been observed. ? The 4f5d spin-allowed and spin-forbidden transitions of Tb{sup 3+} have been observed. ? There is energy transfer between the host and rare-earth activators. -- Abstract: Rare earth (RE = Sm, Eu, Tb, Dy and Tm)-activated K{sub 2}LnZr(PO{sub 4}){sub 3} (Ln = Y, La, Gd and Lu) have been synthesized by solid-state reaction method, and their vacuum ultraviolet (VUV) excitation luminescent characteristics have been investigated. The band in the wavelength range of 130157 nm and the other one range from 155 to 216 nm with the maximum at about 187 nm in the VUV excitation spectra of these compounds are attributed to the host lattice absorption and OZr charge transfer transition, respectively. The charge transfer bands (CTB) of O{sup 2?}-Sm{sup 3+}, O{sup 2?}-Dy{sup 3+} and O{sup 2?}-Tm{sup 3+}, in Sm{sup 3+}, Dy{sup 3+} and Tm{sup 3+}-activated samples, have not been obviously observed probably because the 2p electrons of oxygen are tightly bound to the zirconium ion in the host lattice. For Eu{sup 3+}-activated samples, the relatively weak O{sup 2?}-Eu{sup 3+} CTB at about 220 nm is observed. And for Tb{sup 3+}-activated samples, the bands at 223 and 258 nm are related to the 4f-5d spin-allowed and spin-forbidden transitions of Tb{sup 3+}, respectively. It is observed that there is energy transfer between the host lattice and the luminescent activators (e.g. Eu{sup 3+}, Tb{sup 3+}). From the standpoint of luminescent efficiency, color purity and chemical stability, K{sub 2}GdZr(PO{sub 4}){sub 3}:Sm{sup 3+}, Eu{sup 3+}, Tb{sup 3+} are attractive candidates for novel yellow, red, green-emitting PDP phosphors.

  1. Syntheses, structure and rare earth metal photoluminescence of new and known isostructural A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Ce, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) compounds

    SciTech Connect (OSTI)

    Mohitkar, Shrikant A.; Kalpana, G.; Vidyasagar, K.

    2011-04-15

    Nine new A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Ce, Pr, Eu, Tb, Ho, Er, Tm, Yb, Lu) compounds have been synthesized by solid-state reactions. They are isostructural with six reported analogues of yttrium and other lanthanides and the monoclinic unit cell parameters of all fifteen of them vary linearly with the size of A{sup 3+} ion. Single crystal X-ray structures of eight A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Ce, Pr, Eu, Gd, Tb, Ho, Er, Tm) compounds have been determined. Neat A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Pr, Sm, Eu, Tb, Dy, Ho, Er, Tm) compounds exhibit characteristic rare earth metal photoluminescence. -- Graphical abstract: Among the fifteen isostructural A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=rare earth metal) molybdoantimonites, eight (A=Pr, Sm, Eu, Tb, Dy, Ho, Er, Tm) compounds exhibit neat characteristic lanthanide photoluminescence in the 200-800 nm range at room temperature. Display Omitted Research highlights: {yields} Syntheses of nine new A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Ce, Pr, Eu, Tb, Ho, Er, Tm, Yb, Lu) compounds. {yields} X-ray structures of eight A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Ce, Pr, Eu, Gd, Tb, Ho, Er, Tm) compounds. {yields} Photoluminescence of neat A{sub 2}Mo{sub 4}Sb{sub 2}O{sub 18} (A=Pr, Sm, Eu, Tb, Dy, Ho, Er, Tm) compounds.

  2. On phase equilibria and crystal structures in the systems Ce-Pd-B and Yb-Pd-B. Physical properties of R{sub 2}Pd{sub 13.6}B{sub 5} (R=Yb, Lu)

    SciTech Connect (OSTI)

    Sologub, Oksana; Rogl, Peter; Salamakha, Leonid; Bauer, Ernst; Hilscher, Gerfried; Michor, Herwig; Giester, Gerald

    2010-05-15

    Phase equilibria and crystal structures of ternary compounds were determined in the systems Ce-Pd-B and Yb-Pd-B at 850 deg. C in the concentration ranges up to 45 and 33 at% of Ce and Yb, respectively, employing X-ray single crystal and powder diffraction. Phase relations in the Ce-Pd-B system at 850 deg. C are governed by formation of extended homogeneity fields, tau{sub 2}-CePd{sub 8}B{sub 2-x} (0.10Lu{sub 2}Pd{sub 14}B{sub 5} were determined from X-ray Rietveld refinements and found to be closely related to the Y{sub 2}Pd{sub 14}B{sub 5}-type (I4{sub 1}/amd). The crystal structure of

  3. China Energy Databook -- User Guide and Documentation, Version 7.0

    SciTech Connect (OSTI)

    Fridley, Ed., David; Aden, Ed., Nathaniel; Lu, Ed., Hongyou; Zheng, Ed., Nina

    2008-10-01

    Since 2001, China's energy consumption has grown more quickly than expected by Chinese or international observers. This edition of the China Energy Databook traces the growth of the energy system through 2006. As with version six, the Databook covers a wide range of energy-related information, including resources and reserves, production, consumption, investment, equipment, prices, trade, environment, economy, and demographic data. These data provide an extensive quantitative foundation for understanding China's growing energy system. In addition to providing updated data through 2006, version seven includes revised energy and GDP data back to the 1990s. In the 2005 China Energy Statistical Yearbook, China's National Bureau of Statistics (NBS) published revised energy production, consumption, and usage data covering the years 1998 to 2003. Most of these revisions related to coal production and consumption, though natural gas data were also adjusted. In order to accommodate underestimated service sector growth, the NBS also released revised GDP data in 2005. Beyond the inclusion of historical revisions in the seventh edition, no attempt has been made to rectify known or suspected issues in the official data. The purpose of this volume is to provide a common basis for understanding China's energy system. In order to broaden understanding of China's energy system, the Databook includes information from industry yearbooks, periodicals, and government websites in addition to data published by NBS. Rather than discarding discontinued data series, information that is no longer possible to update has been placed in C section tables and figures in each chapter. As with previous versions, the data are presented in digital database and tabular formats. The compilation of updated data is the result of tireless work by Lu Hongyou and Nina Zheng.

  4. A proposal for positive cooperativity in anion-cation binding in yttrium and lutetium complexes based on o-amino-substituted phenolate ligands. On the way to coordination polymers by self-assembly. Molecular structures of [ClLu(OAr){sub 3}Na] (X-ray) and [ClY(OAr{prime}){sub 3}Y(OAr{prime}){sub 3}Na] (X-ray and {sup 89}Y-NMR)

    SciTech Connect (OSTI)

    Hogerheide, M.P.; Ringelberg, S.N.; Grove, D.M.

    1996-02-28

    The authors prepared the hetero(poly)metallic complexes [ClM(OAr){sub 3}Na] (M = Lu (3a), Y (3b)) and [ClY(OAr`){sub 3}Y(OAR`){sub 3}Na] (4) (OAr = OC{sub 6}H{sub 2}(CH{sub 2}NMe{sub 2}){sub 2}-2,6,Me-4; OAr` = OC{sub 6}H{sub 4}(CH{sub 2}NMe{sub 2})-2). Structural analysis was afforded by NMR spectroscopy and X-ray diffraction. The structures show evidence for anion-cation cooperativity in bonding and are discussed in detail for the compounds in both the solid state and in solution.

  5. Synthesis, crystal structure and properties of Mg{sub 3}B{sub 36}Si{sub 9}C and related rare earth compounds RE{sub 3−x}B{sub 36}Si{sub 9}C (RE=Y, Gd–Lu)

    SciTech Connect (OSTI)

    Ludwig, Thilo; Pediaditakis, Alexis; Sagawe, Vanessa; Hillebrecht, Harald

    2013-08-15

    We report on the synthesis and characterisation of Mg{sub 3}B{sub 36}Si{sub 9}C. Black single crystals of hexagonal shape were yielded from the elements at 1600 °C in h-BN crucibles welded in Ta ampoules. The crystal structure (space group R3{sup ¯}m, a=10.0793(13) Å, c=16.372(3) Å, 660 refl., 51 param., R{sub 1}(F)=0.019; wR{sub 2}(F{sup 2})=0.051) is characterized by a Kagome-net of B{sub 12} icosahedra, ethane like Si{sub 8}-units and disordered SiC-dumbbells. Vibrational spectra show typical features of boron-rich borides and Zintl phases. Mg{sub 3}B{sub 36}Si{sub 9}C is stable against HF/HNO{sub 3} and conc. NaOH. The micro-hardness is 17.0 GPa (Vickers) and 14.5 GPa (Knoop), respectively. According to simple electron counting rules Mg{sub 3}B{sub 36}Si{sub 9}C is an electron precise compound. Band structure calculations reveal a band gap of 1.0 eV in agreement to the black colour. Interatomic distances obtained from the refinement of X-ray data are biased and falsified by the disorder of the SiC-dumbbell. The most evident structural parameters were obtained by relaxation calculation. Composition and carbon content were confirmed by WDX measurements. The small but significant carbon content is necessary by structural reasons and frequently caused by contaminations. The rare earth compounds RE{sub 3−x}B{sub 36}Si{sub 9}C (RE=Y, Dy–Lu) are isotypic. Single crystals were grown from a silicon melt and their structures refined. The partial occupation of the RE-sites fits to the requirements of an electron-precise composition. According to the displacement parameters a relaxation should be applied to obtain correct structural parameters. - Graphical abstract: Single crystals of the new boridesilicide Mg{sub 3}B{sub 36}Si{sub 9}C were obtained from the elements in a Si-melt. Besides B{sub 12}-icosahedra and ethan-like Si{sub 8}-units it contains a disordered SiC-dumbbell. Correct distances were obtained by relaxation calculation based on the X-ray data

  6. Piezo-/dielectric properties of perovskite-structure high-temperature relaxor ferroelectrics: The Pb(Lu{sub 1/2}Nb{sub 1/2})O{sub 3}–Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}–PbTiO{sub 3} ternary ceramics

    SciTech Connect (OSTI)

    Li, Tao; Long, Xifa

    2014-03-01

    Graphical abstract: - Highlights: • Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}-based ternary ferroelectric ceramics were prepared by solid-state synthesis method. • Morphotropic phase boundary region has been determined by XRD, di-/piezoelectric properties. • The compositions near MPB region exhibit excellent piezoelectric properties. - Abstract: A new compositional system of relaxor ferroelectrics was investigated based on the high piezoelectricity Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}–PbTiO{sub 3} ferroelectric perovskite family. Compositions were fabricated near an estimated morphotropic phase boundary (MPB) of the Pb(Lu{sub 1/2}Nb{sub 1/2})O{sub 3}–Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}–PbTiO{sub 3} (PLZNT) ternary system by a two-step synthetic process. Their structures have been analyzed by means of X-ray diffraction technique. On the basis of X-ray powder diffraction, the morphotropic phase boundary (MPB) region for the ternary system was obtained. The Curie temperature T{sub C} of ternary system varied from 240 °C to 330 °C and the coercive fields E{sub c}s > 10 kV/cm. The values of piezoelectric coefficients d{sub 33} vary in the range of 260–450 pC/N with different PZN contents. It is worth noting that the optimum compositions were located at MPB region but near the tetragonal phase. The new PLZNT ceramics exhibit wider range of T{sub C}s and E{sub c}s, making it a promising material for high-powder ultrasound transducers using in a large temperature range.

  7. Sandia National Laboratories: Research: Bioscience

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

    Bioscience Bioscience Biofuels Biodefense Enabling Capabilities Partnership Opportunities Bioscience Leadership Computing and Information Science Engineering Science Geoscience Materials Science Nanodevices and Microsystems Radiation Effects and High Energy Density Science Research Bioscience Overcoming challenges to make advanced "drop-in" biofuels a reality Aries Biothreat detection Hongyou Fan Novel medical diagnostics and therapeutics Biological solutions to critical energy and

  8. Sandia National Laboratories: Research: Materials Science

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

    Materials Science Bioscience Computing and Information Science Electromagnetics Engineering Science Geoscience Materials Science About Materials Science Research Image Gallery Video Gallery Facilities Nanodevices and Microsystems Radiation Effects and High Energy Density Science Research Materials Science Creating materials for energy applications and defense needs Aries Applying innovative characterization and diagnostic techniques Hongyou Fan Development of new materials to support national

  9. Dense LU Factorization on Multicore Supercomputer Nodes (Conference...

    Office of Scientific and Technical Information (OSTI)

    factorization's memory hierarchy contention on now-ubiquitous multi-core architectures. ... During active panel factorization, rank-1 updates stream through memory with minimal ...

  10. Lu Gan | Center for Bio-Inspired Solar Fuel Production

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

    92 2.184 2.149 2.175 2.227 2.284 1993-2016 All Grades - Conventional Areas 2.193 2.187 2.150 2.179 2.231 2.287 1994-2016 All Grades - Reformulated Areas 2.182 2.156 2.138 2.133 2.181 2.249 1994-2016 Regular 2.033 2.025 1.991 2.016 2.068 2.128 1993-2016 Conventional Areas 2.036 2.030 1.993 2.021 2.073 2.132 1993-2016 Reformulated Areas 2.009 1.980 1.965 1.959 2.011 2.080 1994-2016 Midgrade 2.327 2.321 2.285 2.322 2.371 2.424 1994-2016 Conventional Areas 2.322 2.317 2.280 2.320 2.371 2.423

  11. SSRL BEAM PORT SCHEDULE

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

    5-4 Oct. 26, 2009 Oct. 27, 2009 Oct. 28, 2009 Oct. 29, 2009 Oct. 30, 2009 Oct. 31, 2009 Nov. 01, 2009 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU 8820* D.LU BEAM LINE 8-1 Oct. 26, 2009 Oct. 27, 2009 Oct. 28, 2009 Oct. 29, 2009 Oct. 30, 2009 Oct. 31, 2009 Nov. 01, 2009 Unscheduled Unscheduled Unscheduled Unscheduled

  12. SSRL BEAM PORT SCHEDULE

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

    5-4 Nov. 15, 2010 Nov. 16, 2010 Nov. 17, 2010 Nov. 18, 2010 Nov. 19, 2010 Nov. 20, 2010 Nov. 21, 2010 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU BEAM LINE 8-1 Nov. 15, 2010 Nov. 16, 2010 Nov. 17, 2010 Nov. 18, 2010 Nov. 19, 2010 Nov. 20, 2010 Nov. 21, 2010 Unscheduled Unscheduled Unscheduled 3269 S.SUN 3269 S.SUN 3269 S.SUN 3269

  13. SSRL BEAM PORT SCHEDULE

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

    5-4 Nov. 05, 2007 Nov. 06, 2007 Nov. 07, 2007 Nov. 08, 2007 Nov. 09, 2007 Nov. 10, 2007 Nov. 11, 2007 Unscheduled 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU CHANGE/8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU BEAM LINE 8-1 Nov. 05, 2007 Nov. 06, 2007 Nov. 07, 2007 Nov. 08, 2007 Nov. 09, 2007 Nov. 10, 2007 Nov. 11, 2007 8821 D.Brehmer 8821 D.Brehmer 8821 D.Brehmer 3064* S.SUN 3075

  14. SSRL BEAM PORT SCHEDULE

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

    5-4 Nov. 10, 2008 Nov. 11, 2008 Nov. 12, 2008 Nov. 13, 2008 Nov. 14, 2008 Nov. 15, 2008 Nov. 16, 2008 DOWN 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU 8820 D.LU BEAM LINE 8-1 Nov. 10, 2008 Nov. 11, 2008 Nov. 12, 2008 Nov. 13, 2008 Nov. 14, 2008 Nov. 15, 2008 Nov. 16, 2008 DOWN DOWN DOWN DOWN DOWN 3064 S.SUN 3064 S.SUN DOWN DOWN DOWN DOWN VUV CHECKOUT

  15. Materials Data on LuNiSn4 (SG:65) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  16. Materials Data on LuNiBi (SG:216) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2015-03-09

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  17. Materials Data on Lu6Ni2Sn (SG:71) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2015-03-19

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  18. Materials Data on Lu2NiSn6 (SG:65) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2015-02-09

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  19. Materials Data on Lu(BRh)4 (SG:68) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2015-02-18

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  20. Materials Data on Lu(BC)2 (SG:127) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  1. Materials Data on LuBPd3 (SG:221) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  2. Materials Data on LuBRh3 (SG:221) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  3. Materials Data on Lu2Pd2Pb (SG:127) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2015-05-16

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  4. Materials Data on Lu(SiPd)2 (SG:139) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  5. Materials Data on Lu2SO2 (SG:164) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  6. Materials Data on LuB6 (SG:221) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  7. MueLu User's Guid for Trilinos Version 11.12.

    SciTech Connect (OSTI)

    Hu, Jonathan J.; Prokopenko, Andrey; Wiesner, Tobias A.; Siefert, Christopher; Tuminaro, Raymond S.

    2014-10-01

    This is the official user guide for the M UE L U multigrid library in Trilinos version 11.12. This guide provides an overview of M UE L U , its capabilities, and instructions for new users who want to start using M UE L U with a minimum of effort. Detailed information is given on how to drive M UE L U through its XML interface. Links to more advanced use cases are given. This guide gives information on how to achieve good parallel performance, as well as how to introduce new algorithms. Finally, readers will find a comprehensive listing of available M UE L U options. Any options not documented in this manual should be considered strictly experimental.

  8. Materials Data on Lu2S3 (SG:122) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  9. Power/Performance Trade-offs of Small Batched LU Based Solvers on GPUs

    SciTech Connect (OSTI)

    Villa, Oreste; Fatica, Massimiliano; Gawande, Nitin A.; Tumeo, Antonino

    2013-08-26

    In this paper we propose and analyze a set of batched linear solvers for small matrices on Graphic Processing Units (GPUs), evaluating the various alternatives depending on the size of the systems to solve. We discuss three different solutions that operate with different level of parallelization and GPU features. The first, exploiting the CUBLAS library, manages matrices of size up to 32x32 and employs Warp level (one matrix, one Warp) parallelism and shared memory. The second works at Thread-block level parallelism (one matrix, one Thread-block), still exploiting shared memory but managing matrices up to 76x76. The third is Thread level parallel (one matrix, one thread) and can reach sizes up to 128x128, but it does not exploit shared memory and only relies on the high memory bandwidth of the GPU. The first and second solution only support partial pivoting, the third one easily supports partial and full pivoting, making it attractive to problems that require greater numerical stability. We analyze the trade-offs in terms of performance and power consumption as function of the size of the linear systems that are simultaneously solved. We execute the three implementations on a Tesla M2090 (Fermi) and on a Tesla K20 (Kepler).

  10. CNMS D Jun-Qiang Lu Computer Science and Mathematics Division

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

    D I I S S C C O O V V E E R R Y Y SEMINAR SERIES Abstract The pursuit of spintronics ultimately depends on our ability to steer spin currents and detect or flip their polarization. ...

  11. Weigang Lu | Center for Gas SeparationsRelevant to Clean Energy...

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

    EFRC Research My work focuses on Metal-Organic Frameworks (MOFs) and Porous Polymer Networks ... Hong-Cai A Route to Metal-Organic Frameworks through Framework Templating, Inorg. ...

  12. Materials Data on Lu10Ti6O27 (SG:8) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  13. Materials Data on LuSBr (SG:59) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  14. Materials Data on Ba2LuIrO6 (SG:225) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  15. Materials Data on Sr2LuIrO6 (SG:14) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2015-02-09

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  16. ORNL/luSA-85/6 Health and Safety Research Division PRELIMINARY...

    Office of Legacy Management (LM)

    was used under contract with the Atomic Energy Commission (AEC) to process uranium ... Record files at Old Reactive Metals, Inc. contain information which indicates that the ...

  17. Materials Data on LuB6 (SG:221) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  18. Materials Data on LuB2Os3 (SG:191) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  19. Materials Data on Lu(SiOs)2 (SG:139) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  20. Materials Data on LuRh3C (SG:221) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2015-02-09

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  1. Materials Data on LuHCl (SG:166) by Materials Project

    SciTech Connect (OSTI)

    Kristin Persson

    2015-04-29

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  2. Materials Data on Sr4Lu3F17 (SG:1) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  3. Materials Data on Lu2SO2 (SG:164) by Materials Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Kristin Persson

    2014-11-02

    Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

  4. Submitting Organization Sandia National Laboratories

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

    Hongyou Fan Advanced Materials Laboratory 1001 University Boulevard SE Albuquerque, NM 87106 Country: USA Phone: 505-272-7128 Fax: 505-272-7336 hfan@sandia.gov Contact Person Glenn D. Kubiak, Director Sandia National Laboratories PO Box 969 Mail Stop 9405 Livermore, CA 94551-0969 USA Phone: 925-294-3375 Fax: 925- 294-3403 kubiak@sandia.gov Joint Entry Lockheed Martin Aeronautics Mail Zone 2893, PO Box 748 City: Fort Worth, Texas 76101 USA Earl Stromberg Phone: (817) 763-7376 Fax: (817) 762-6911

  5. SSRL BEAM PORT SCHEDULE

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

    3-3 Jumbo START UP DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti 5-2 SSRL DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti DOWN -Faciliti START UP 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820 -D.Lu-Fac 5-4 NIM 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820 -D.Lu-Fac 8820

  6. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    and fragmentation Yu, Lu ; Smith, Jeremy ; Laskin, Alexander ; George, ... of carbonyl and hydroxyl radical Yu, Lu ; Smith, Jeremy ; Laskin, Alexander ; Anastasio, ...

  7. Browse by Discipline -- E-print Network Subject Pathways: Chemistry...

    Office of Scientific and Technical Information (OSTI)

    Qi, Limin (Limin Qi) - College of Chemistry, Peking University Qiao, Pizhong (Pizhong Qiao) - Department of Civil Engineering, University of Akron Qin, Lu-Chang (Lu-Chang Qin) - ...

  8. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... ; Schmitt, Felix ; Lu, Donghui ; Moore, R.G. ; Zhang, C. ; Meevasana, W. ; ... Brian ; He, Yu ; Tanaka, Kiyohisa ; Moore, Robert G. ; Lu, Donghui ; Yoshida, ...

  9. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Leuenberger, Dominik (3) Lu, Donghui (3) Mo, Sung-Kwan (3) Moore, Robert G. (3) Sasagawa, ... ; Schmitt, Felix ; Lu, Donghui ; Moore, R.G. ; Zhang, C. ; Meevasana, W. ; ...

  10. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Jung, Jin-Ho (1) Kouris, Demitris A. (1) Lee, Chang Jun (1) Lu, Xun (1) Mi Changwen (1) ... x-rays Nguyen, Thanhhai ; Lu, Xun ; Lee, Chang Jun ; Jeon, Insu, E-mail: ...

  11. Systematic study of photoluminescence upon band gap excitation...

    Office of Scientific and Technical Information (OSTI)

    R sub 12Nasub 12TiOsub 3:Pr (RLa, Gd, Lu, and Y) Citation Details In-Document ... R sub 12Nasub 12TiOsub 3:Pr (RLa, Gd, Lu, and Y) Prsup 3+-doped perovskites R ...

  12. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    T. ; Malaeb, W. ; Ideta, S. ; Lu, D. H. ; Moor, R. G. ; Shen, Z.-X. ; Okawa, M. ; Kiss, ... T. ; Malaeb, W. ; Ideta, S. ; Lu, D. H. ; Moor, R. G. ; Shen, Z. -X. ; Okawa, M. ; Kiss, ...

  13. Summer 2012 Intern Project- Tyler Rhodes | Center for Energy...

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

    and structure of the LuPtSb films. Electrical transport measurements on these films will be used to study the fundamentals of the electronic structure of LuPtSb. View Poster

  14. Power Electronics | Department of Energy

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

    ... Device Letters, IEEE. Sept 2010 Lu, B.; Palacios ,T. "High Breakdown ( > 1500 V ) AlGaNGaN HEMTs by Substrate-Transfer Technology" Electron Device Letters, IEEE. Sept 2010. Lu, ...

  15. Slide05 | OSTI, US Dept of Energy, Office of Scientific and Technical...

    Office of Scientific and Technical Information (OSTI)

    The Challenges of Numeric Data: * Data sets are hard to find. http:nucleardata.nuclear.lu.setoinucSearch.asp

  16. Search for: All records | DOE Patents

    Office of Scientific and Technical Information (OSTI)

    Lu, Wenquan" Name Name ORCID Search Authors Patent Number: Patent Application Number: Contract Number: Subject: LabTechnology Center: Sponsoring Office: Issue Date: to Sort: ...

  17. Search for: All records | DOE Patents

    Office of Scientific and Technical Information (OSTI)

    Lu" Name Name ORCID Search Authors Patent Number: Patent Application Number: Contract Number: Subject: LabTechnology Center: Sponsoring Office: Issue Date: to Sort: Relevance ...

  18. Porous Polymer Networks: Synthesis, Porosity, and Applications...

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

    Porous Polymer Networks: Synthesis, Porosity, and Applications in Gas StorageSeparation Previous Next List Weigang Lu, Daqiang Yuan, Dan Zhao, Christine Inge Schilling, Oliver...

  19. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Chris ; Lu Jiwei ; Floro, Jerrold A. ; He Li ; Hull, Robert ; Dolph, Melissa C. ; Wolf, Stuart A. ; Department of Physics, University of Virginia, Charlottesville, Virginia ...

  20. CoverSheet

    Office of Scientific and Technical Information (OSTI)

    Carbon Sequestration Partnership: Preliminary CO2-PENS model Author(s): Stauffer, Philip H. Dai, Zhenxue Lu, Zhiming Middleton, Richard S. Jacobs, John F. Carey, James W. Intended...

  1. Green chemical synthesis of silver nanomaterials with maltodextrin...

    Office of Scientific and Technical Information (OSTI)

    The adsorbed content of the maltodextrin was characterized using thermogravimetric analysis (TGA). less Authors: Tallant, David Robert ; Lu, Ping ; Lambert, Timothy N. ; Bell, ...

  2. A Zr-based bulk metallic glass for future stent applications...

    Office of Scientific and Technical Information (OSTI)

    modeling, and in vitro human vascular cell response Citation Details In-Document ... modeling, and in vitro human vascular cell response Authors: Huang, Lu ; Pu, Chao ; ...

  3. Features of primary damage by high energy displacement cascades...

    Office of Scientific and Technical Information (OSTI)

    for ORCID "0000000153327128" ; Lu, Chenyang 2 ; Osetskiy, Yuri N. 1 ; Samolyuk, German D. 1 ; Caro, Alfredo 3 ; Wang, Lumin 2 ; Stoller, Roger E. 1 + Show Author ...

  4. Functional electrolyte for lithium-ion batteries (Patent) | DOEPatents

    Office of Scientific and Technical Information (OSTI)

    Inventors: Zhang, Lu ; Zhang, Zhengcheng ; Amine, Khalil Issue Date: 2015-04-14 OSTI Identifier: 1178010 Assignee: UChicago Argonne, LLC (Chicago, IL) ANL Patent Number(s): ...

  5. Non-aqueous electrolyte for lithium-ion battery (Patent) | DOEPatents

    Office of Scientific and Technical Information (OSTI)

    Inventors: Zhang, Lu ; Zhang, Zhengcheng ; Amine, Khalil Issue Date: 2014-04-15 OSTI Identifier: 1129197 Assignee: UChicago Argonne, LLC (Chicago, IL) ANL Patent Number(s): ...

  6. CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE (Technical...

    Office of Scientific and Technical Information (OSTI)

    Authors: Gary T. Rochelle ; Eric Chen ; J.Tim Cullinane ; Marcus Hilliard ; Jennifer Lu ; Babatunde Oyenekan ; Ross Dugas Publication Date: 2004-07-29 OSTI Identifier: 829575 DOE ...

  7. ASU EFRC - Postdoctoral fellows

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

    Postdoctoral fellows Barun Das Postdoctoral Fellow Bhupesh Goyal Postdoctoral fellow Jackson Megiatto Postdoctoral Fellow Lu Gan Postdoctoral fellow Matthieu Koepf Postdoctoral...

  8. Sudhanshu Sharma | Center for Bio-Inspired Solar Fuel Production

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

    Principal Investigators Postdoctoral Fellows Center researchers Graduate Students Undergraduate Students All Bisfuel Center Personnel Barun Das Bhupesh Goyal Jackson Megiatto Lu...

  9. Bhupesh Goyal | Center for Bio-Inspired Solar Fuel Production

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

    Principal Investigators Postdoctoral Fellows Center researchers Graduate Students Undergraduate Students All Bisfuel Center Personnel Barun Das Bhupesh Goyal Jackson Megiatto Lu ...

  10. Barun Das | Center for Bio-Inspired Solar Fuel Production

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

    Principal Investigators Postdoctoral Fellows Center researchers Graduate Students Undergraduate Students All Bisfuel Center Personnel Barun Das Bhupesh Goyal Jackson Megiatto Lu ...

  11. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... I for suppressing bladder cancer proliferation Wang, Xiangbo ; Zhang, Lu ; ... of genes plays a critical role in many important human diseases, especially in cancer. ...

  12. Highly porous metal-organic framework sustained with 12-connected...

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

    Highly porous metal-organic framework sustained with 12-connected nanoscopic octahedra Previous Next List Weigang Lu , Daqiang Yuan , Trevor A. Makal , Zhangwen Wei , Jian-Rong Li ...

  13. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... ; Zhao, Xuan ; Hoffman, Brian ; Lu, Yi ; UIUC) March 2016 , American Chemical Society (ACS) Characterization and Structure of a Znsuperscript 2+ and 2Fe-2S-containing Copper ...

  14. April 25, 2012 | Center for Gas SeparationsRelevant to Clean...

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

    Weigang (Luke) Lu (Dept. of Chemistry, Texas A&M University) Polyamine-tethered porous polymer networks for post-combustion CO2 capture Richard Martin (Computational Research ...

  15. Engineered enzymatically active bacteriophages and methods of...

    Office of Scientific and Technical Information (OSTI)

    Authors: Collins, James J 1 ; Kobayashi, Hideki 2 ; Kearn, Mads 3 ; Araki, Michihiro 4 ; Friedland, Ari 5 ; Lu, Timothy Kuan-Ta 6 + Show Author Affiliations (Newton, ...

  16. Photoelectrochemical etching of epitaxial InGaN thin films: kinetics...

    Office of Scientific and Technical Information (OSTI)

    films: kinetics and nanostructuring. Abstract not provided. Authors: Xiao, Xiaoyin ; Fischer, Arthur J. ; Coltrin, Michael E. ; Lu, Ping ; Koleske, Daniel ; Wang, George T. ;...

  17. Moderate Doping Leads to High Performance of Semiconductor/Insulator...

    Office of Scientific and Technical Information (OSTI)

    Title: Moderate Doping Leads to High Performance of SemiconductorInsulator Polymer Blend Transistors Authors: Lu, Guanghao ; Blakesley, James ; Himmelberger, Scott ; Pingel, ...

  18. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Filter by Author Zavadil, Kevin Robert (65) Ohlhausen, James Anthony (14) Kotula, Paul ... Bunker, Bruce Conrad (3) Huang, Jian Yu (3) Kent, Michael Stuart (3) Lu, Ping (3) ...

  19. Long life lithium batteries with stabilized electrodes (Patent...

    Office of Scientific and Technical Information (OSTI)

    Inventors: Amine, Khalil ; Liu, Jun ; Vissers, Donald R ; Lu, Wenquan Issue Date: 2015-04-21 OSTI Identifier: 1178256 Assignee: UChicago Argonne, LLC (Chicago, IL) CHO Patent ...

  20. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Hughes, Patrick (1) Liu, Xiaobing (1) Lu, Shilei (1) Save Results Save this search to My ... technology and fully realize its energy saving potential. less Full Text Available ...

  1. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Hughes, Patrick (1) Liu, Xiaobing (1) Lu, Shilei (1) Save Results Excel (limit 2000) CSV ... technology and fully realize its energy saving potential. less Full Text Available ...

  2. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Hughes, Patrick (1) Lu, Shilei (1) Wang, Shaojie (1) Save Results Excel (limit 2000) CSV ... technology and fully realize its energy saving potential. less Full Text Available ...

  3. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Atomic-scale chemical quantification of oxide interfaces using energy-dispersive X-ray spectroscopy Lu, Ping ; Van Benthem, Mark ; Xiong, Jie ; Jia, Quanxi Atomic-scale ...

  4. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Performance and characterization of a MEMS-based device for alignment and manipulation of x-ray nanofocusing optics Xu, Weihe ; Lauer, Kenneth ; Yan, Hui ; Milanovic, Veljko ; Lu, ...

  5. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Filter Results Filter by Subject fossil-fueled power plants (1) inorganic, organic, physical, and analytical chemistry (1) Filter by Author Davila, Jenny (1) Ito, Brandon (1) Lu, ...

  6. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Inna M. ; Yi, Ming ; Chen, Yulin ; Moore, Rob G. ; Shen, Zhi-Xun October 2014 Phase ... ; Schmitt, Felix ; Lu, Donghui ; Moore, R.G. ; Zhang, C. ; Meevasana, W. ; ...

  7. Lutetium gadolinium halide scintillators

    DOE Patents [OSTI]

    Shah, Kanai S.; Higgins, William M; Van Loef, Edgar V; Glodo, Jaroslaw

    2010-07-13

    Lutetium gadolinium halide scintillators, devices and methods, including a composition having the formula Lu.sub.xGd.sub.(1-x)Halide and a dopant.

  8. Sulfonate-Grafted Porous Polymer Networks for Preferential CO2...

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

    Sulfonate-Grafted Porous Polymer Networks for Preferential CO2 Adsorption at Low Pressure Previous Next List Weigang Lu, Daqiang Yuan, Julian Sculley, Dan Zhao, Rajamani Krishna,...

  9. Building multiple adsorption sites in porous polymer networks...

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

    Building multiple adsorption sites in porous polymer networks for carbon capture applications Previous Next List Weigang Lu, Wolfgang M. Verdegaal, Jiamei Yu, Perla B Balbuena,...

  10. NERSC-Mar-2013.pptx

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

    Sarkar (Rice) Ph.D. Students Muthu Baskaran Uday Bondhugula Jim Dinan Xiaoyang Gao Albert Hartono Justin Holewinski Sriram Krishnamoorthy Qingda Lu Mohammad Arafat Tom Henretty...

  11. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    LANL Deliverable to the Big Sky Carbon Sequestration Partnership: Preliminary CO2-PENS model Stauffer, Philip H. ; Dai, Zhenxue ; Lu, Zhiming ; Middleton, Richard S. ; Jacobs, John ...

  12. Events & Topics In Bioenergy | Photosynthetic Antenna Research...

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

    Events & Topics In Bioenergy Events & Topics In Bioenergy Dr. Chenyang Lu Smart Building with Wireless Sensor Networks Dr. Joseph Cullen "Measuring the Environmental Benefits of ...

  13. GreenGov Presidential Award

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

    (Council on Environmental Quality chair), Tad Pearson (INL), Neile Miller (DOE-Headquarters) and Chris Lu (Secretary of the Cabinet). Editorial Date October 19, 2010 By Brad Bugger...

  14. Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High...

    Office of Scientific and Technical Information (OSTI)

    Authors: Chen, Yulin ; Iyo, Akira ; Yang, Wanli ; Zhou, Xingjiang ; Lu, Donghui ; Eisaki, Hiroshi ; Devereaux, Thomas P. ; Hussain, Zahid ; Shen, Z.-X. ; Stanford U., Phys. Dept. ...

  15. InGaN Quantum Dot Fabrication using Quantum Size ControlledPhotoelect...

    Office of Scientific and Technical Information (OSTI)

    Authors: Fischer, Arthur Joseph ; Xiao, Xiaoyin ; Lu, Ping ; Tsao, Jeffrey Yeenien ; Wang, George T. ; Koleske, Daniel ; Subramania, Ganapathi Subramanian ; Coltrin, Michael ...

  16. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Have feedback or suggestions for a way to improve these results? Mixing LU and QR factorization algorithms to design high-performance dense linear algebra solvers Faverge, ...

  17. Electronically- and crystal-structure-driven magnetic structures...

    Office of Scientific and Technical Information (OSTI)

    The synthesis of the new equiatomic RScSb ( R La-Nd, Sm, Gd-Tm, Lu, Y) compounds has ... (La-Nd, Sm) and the CeFeSi-type (P4 nmm) structure for the heavier R ( R Gd-Tm, Lu, Y). ...

  18. Observation

    Office of Scientific and Technical Information (OSTI)

    to an Orbital-Selective Mott Phase in A x Fe 2-y Se 2 (AK, Rb) Superconductors M. Yi, 1, 2 D. H. Lu, 3 R. Yu, 4 S. C. Riggs, 1, 2 J.-H. Chu, 1, 2 B. Lv, 5 Z. Liu, 1, 2 M. Lu,...

  19. Observation of Temperature-Induced Crossover to an Orbital-Selective...

    Office of Scientific and Technical Information (OSTI)

    Authors: Yi, M. ; Lu, D.H. ; Yu, R. ; Riggs, S.C. ; Chu, J.-H. ; Lv, B. ; Liu, Z. ; Lu, M. ; Cui, Y.-T. ; Hashimoto, M. ; Mo, S.-K. ; Hussain, Z. ; Chu, C.W. ; Fisher, I.R. ; Si, ...

  20. Syntheses, Structure, Magnetism, and Optical Properties of Lutetium-based Interlanthanide Selenides

    SciTech Connect (OSTI)

    Booth, Corwin H; Jin, Geng Bang; Choi, Eun Sang; Guertin, Robert P.; Brooks, James S.; Booth, Corwin H.; Albrecht-Schmitt, Thomas E.

    2007-10-01

    Ln{sub 3}LuSe{sub 6} (Ln = La, Ce), {beta}-LnLuSe{sub 3} (Ln = Pr, Nd), and Ln{sub x}Lu{sub 4-x}Se{sub 6} (Ln = Sm, Gd; x = 1.82, 1.87) have been synthesized using a Sb{sub 2}Se{sub 3} flux at 1000 C. Ln{sub 3}LuSe{sub 6} (Ln = La, Ce) adopt the U{sub 3}ScS{sub 6}-type three-dimensional structure, which is constructed from two-dimensional {infinity}{sup 2} [Ln{sub 3}Se{sub 6}]{sup 3-} slabs with the gaps between these slabs filled by octahedrally coordinated Lu{sup 3+} ions. The series of {beta}-LnLuSe{sub 3} (Ln = Pr, Nd) are isotypic with UFeS{sub 3}. Their structures include layers formed from LuSe6 octahedra that are separated by eight-coordinate larger Ln{sup 3+} ions in bicapped trigonal prismatic environments. Sm{sub 1.82}Lu{sub 2.18}Se{sub 6} and Gd{sub 1.87}Lu{sub 2.13}Se{sub 6} crystallize in the disordered F-Ln{sub 2}S{sub 3} type structure with the eight-coordinate bicapped trigonal prismatic Ln(1) ions residing in the one-dimensional channels formed by three different double chains via edge and corner sharing. These double chains are constructed from Ln(2)Se{sub 7} monocapped trigonal prisms, Ln(3)Se{sub 6} octahedra, and Ln(4)S{sub 6} octahedra, respectively. The magnetic susceptibilities of {beta}-PrLuSe{sub 3} and {beta}-NdLuSe{sub 3} follow the Curie-Weiss law. Sm{sub 1.82}Lu{sub 2.18}Se{sub 6} shows van Vleck paramagnetism. Magnetic measurements show that Gd{sub 1.87}Lu{sub 2.13}Se{sub 6} undergoes an antiferromagnetic transition around 4 K. Ce{sub 3}LuSe{sub 6} exhibits ferromagnetic ordering below 5 K. The optical band gaps for La{sub 3}LuSe{sub 6}, Ce{sub 3}LuSe{sub 6}, {beta}- PrLuSe{sub 3}, {beta}-NdLuSe{sub 3}, Sm{sub 1.82}Lu{sub 2.18}Se{sub 6}, and Gd{sub 1.87}Lu{sub 2.13}Se{sub 6} are 1.26, 1.10, 1.56, 1.61, 1.51, and 1.56 eV, respectively.

  1. Observation of a topologically non-trivial surface state in half-Heusler

    Office of Scientific and Technical Information (OSTI)

    PtLuSb (001) thin films (Journal Article) | SciTech Connect Observation of a topologically non-trivial surface state in half-Heusler PtLuSb (001) thin films Citation Details In-Document Search Title: Observation of a topologically non-trivial surface state in half-Heusler PtLuSb (001) thin films The discovery of topological insulators, materials with bulk band gaps and protected cross-gap surface states in compounds such as Bi2Se3, has generated much interest in identifying topological

  2. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    ... Coherent spin control of a nanocavity-enhanced qubit in diamond Li, Luozhou ; Lu, Ming ; ... Among solid-state systems, the nitrogen-vacancy centre in diamond has emerged as an ...

  3. Effects of q -profile structures on intrinsic torque reversals...

    Office of Scientific and Technical Information (OSTI)

    Title: Effects of q -profile structures on intrinsic torque reversals Authors: Lu, Z. X. ; Wang, W. X. ; Diamond, P. H. ; Tynan, G. ; Ethier, S. ; Chen, J. ; Gao, C. ; Rice, J. E. ...

  4. Mapping N-linked Glycosylation Sites in the Secretome and Whole...

    Office of Scientific and Technical Information (OSTI)

    Authors: Wang, Lu ; Aryal, Uma K. ; Dai, Ziyu ; Mason, Alisa C. ; Monroe, Matthew E. ; Tian, Zhixin ; Zhou, Jianying ; Su, Dian ; Weitz, Karl K. ; Liu, Tao ; Camp, David G. ; Smith...

  5. Methane storage in advanced porous materials | Center for Gas...

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

    Methane storage in advanced porous materials Previous Next List Trevor A. Makal, Jian-Rong Li, Weigang Lu and Hong-Cai Zhou, Chem. Soc. Rev., 2012,41, 7761-7779 DOI: 10.1039...

  6. CHRISTIAN SEIGNEUR

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

    Huang, M., G.R. Carmichael, S. Kulkarni, D.G. Streets, Z. Lu, Q. Zhang, R.B. Pierce, Y. Kondo, J.L. Jimenez, M.J. Cubison, B. Anderson, and A. Wisthaler, Sectoral and Geographical...

  7. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Fermi Surface And Quasiparticle Excitations of Sr2RhO4 Baumberger, F. ; Ingle, N.J.C. ; Meevasana, W. ; Shen, K.M. ; Lu, D.H. ; Stanford U., Appl. Phys. Dept. SLAC, SSRL ; Perry, ...

  8. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Doyle, Barney Lee (11) Brewer, Luke N. (10) Rodriguez, Mark Andrew (10) Zavadil, Kevin Robert (10) Ihlefeld, Jon F. (9) Smentkowski, Vincent S. (8) Brennecka, Geoffrey L. (6) Lu, ...

  9. Microsoft Word - racoro_final.docx

    Office of Scientific and Technical Information (OSTI)

    ... Conf. Clouds Precip., Leipzig, Germany, 28 July to 3 August 2012, Accepted for oral presentation. Vogelmann, A., T. Toto, W. Lin, Y. Liu, C. Lu, M. Jensen, G. McFarquhar, R. ...

  10. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Filter Results Filter by Author Nazaretski, Evgeny (3) Xu, Weihe (3) Lauer, Kenneth (2) Lu, Ming (2) Yan, Hui (2) Camino, Fernando (1) Chu, Yong S. (1) Clark, Jesse N. (1) ...

  11. Phase Competition in Trisected Superconducting Dome (Journal...

    Office of Scientific and Technical Information (OSTI)

    Authors: Vishik, I.M. ; Hashimoto, M ; He, Rui-Hua ; Lee, Wei-Sheng ; Schmitt, Felix ; Lu, Donghui ; Moore, R.G. ; Zhang, C. ; Meevasana, W. ; Sasagawa, T. ; Uchida, S. ; Fujita, ...

  12. Comment on 'A planar refractive x-ray lens made of nanocrystalline diamond'[J. Appl. Phys. 108, 123107 (2010)

    SciTech Connect (OSTI)

    Kroon, R. E.

    2013-05-28

    The material LuAG (lutetium aluminium garnet) has been confused with LAG (lanthanum aluminium garnet). In general, aluminium garnet phases only occur for the smaller trivalent metal cations and LAG is not known to have been synthesized.

  13. CO2 CAPTURE BY ABSORPTION WITH POTASSIUM CARBONATE (Technical...

    Office of Scientific and Technical Information (OSTI)

    The baseline pilot plant campaign with 30% MEA has been started. Authors: Gary T. Rochelle ; Eric Chen ; Jennifer Lu ; Babatunde Oyenekan ; Ross Dugas Publication Date: 2005-04-29 ...

  14. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Lu, Ming (1) Milanovic, Veljko (1) Nazaretski, Evgeny (1) Xu, Weihe (1) Yan, Hui (1) Save Results Excel (limit 2000) CSV (limit 5000) XML (limit 5000) Have feedback or suggestions ...

  15. Confinement of Metal-Organic Polyhedra in Silica Nanopores |...

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

    Confinement of Metal-Organic Polyhedra in Silica Nanopores Previous Next List Lin-Bing Sun, Jian-Rong Li, Weigang Lu, Zhi-Yuan Gu, Zhiping Luo, and Hong-Cai Zhou, J. Am. Chem....

  16. ARM - Technical Reports

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

    ... Report (PDF, 1.4MB) ProSensing Inc. 2010 Whole Sky Imager Retrieval Guide (PDF, 2.0MB) ... Shaw, RA, M Beals, JP Fugal, SM Spuler, N Black, and J Lu 2012 ARM Standards Policy ...

  17. Interfacial effects revealed by ultrafast relaxation dynamics...

    Office of Scientific and Technical Information (OSTI)

    Title: Interfacial effects revealed by ultrafast relaxation dynamics in BiFeO 3 YBa 2 Cu 3 O 7 bilayers Authors: Springer, D. ; Nair, Saritha K. ; He, Mi ; Lu, C. L. ; Cheong, S. ...

  18. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Inflation in the generalized inverse power law scenario Lu, Zhun, E-mail: zhunlu@seu.edu.cn We propose a single field inflationary model by generalizing the inverse power law ...

  19. Sulfur tolerant highly durable CO.sub.2 sorbents (Patent) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    C. Also provided are doped CaO sorbents for the capture of carbon dioxide in the presence of SO.sub.2. Authors: Smirniotis, Panagiotis G. 1 ; Lu, Hong 2 + Show Author ...

  20. Daqiang Yuan | Center for Gas SeparationsRelevant to Clean Energy...

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

    Lu, Weigang; Yuan, Daqiang; Makal, Trevor A; Wei, Zhangwen; Li, Jian-Rong; and Zhou, Hong-Cai Highly porous metal-organic framework sustained with 12-connected nanoscopic ...

  1. A Route to Metal-Organic Frameworks through Framework Templating...

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

    A Route to Metal-Organic Frameworks through Framework Templating Previous Next List Zhangwen Wei, Weigang Lu, Hai-Long Jiang, and Hong-Cai Zhou, Inorg. Chem., 2013, 52 (3), pp ...

  2. A Highly Porous and Robust (3,3,4)-Connected Metal-Organic Framework...

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

    Highly Porous and Robust (3,3,4)-Connected Metal-Organic Framework Assembled with a 90 Bridging-Angle Embedded Octacarboxylate Ligand Previous Next List Weigang Lu, Daqiang Yuan, ...

  3. Center for Nanophase Materials Sciences (CNMS) - Publications

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

    W. Lu, J. Bernholc, and B. Sumpter, "Electron Transport in Molecular Electronics Systems," J. Phys. Conf. Series 16, 283 (2005). V. V. Osipov, A. G. Petukhov, and V. N....

  4. Instructions for Preparing Occupational Exposure Data for Submittal...

    Broader source: Energy.gov (indexed) [DOE]

    for this monitoring period, in millirem. 45 Committed Equivalent Dose to the lungs (CEqD - LU) 189 7 302-308 The 50-year Committed Equivalent Dose to the lungs from the...

  5. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Lu, Guang-Hong, E-mail: LGH@buaa.edu.cn School of Physics and Nuclear Energy Engineering, ... Inclusion of the quadratic viscous torque led to construction of an optimization problem ...

  6. Template for Electronic Submission to ACS Journals

    Office of Scientific and Technical Information (OSTI)

    Lam, Luis E. Sanchez-Diaz, Gregory S. Smith, Bradley D. Olsen, ' and Wei-Ren Chen ... B 2007, 111, 11330. (22) Lu, Y.; Harding, S. E.; Turner, A.; Smith, B.; Athwal, D. S.; ...

  7. ARM - Publications: Science Team Meeting Documents

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

    During the 199798 El Nio: A Test for Two Climate Models Lu, R.(a), Dong, B.(b), Potter, G.L.(c), and Cess, R.D.(d), Institute of Atmospheric Physics, Chinese Academy of...

  8. Observing AAPI Heritage Month

    Broader source: Energy.gov [DOE]

    Editor's Note: This blog originally appeared on the White House Blog, and is authored by Chris Lu, Assistant to the President and Cabinet Secretary.  He is also the Co-Chair of the White House...

  9. Structural disorder and magnetism in rare-earth (R) R117Co54...

    Office of Scientific and Technical Information (OSTI)

    The cubic R117Co54+xSn112y compounds (R La-Lu, except Pm, Eu, and Yb) have been synthesized and characterized using X-ray diffraction and magnetization measurements. The ...

  10. Jatropha Africa | Open Energy Information

    Open Energy Info (EERE)

    Africa Jump to: navigation, search Name: Jatropha Africa Place: Croydon, Greater London, United Kingdom Zip: CR0 5LU Product: UK-based biodiesel feedstock company that is growing...

  11. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Filter by Author Gunzburger, Max D (7) Webster, Clayton G (6) Zhang, Guannan (5) Gunzburger, Max D ORNL (4) Webster, Clayton G ORNL (4) Zhang, Guannan ORNL (4) Lu, Dan (2) ...

  12. To bolster lithium battery life, add a little salt > EMC2 News...

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

    'Genius Award' In This Section EMC2 News Archived News Stories To bolster lithium battery life, add a little salt August 13th, 2014 By Blaine Friedlander Archer Lu...

  13. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Kepler, Thomas B. (5) Schulman, Brenda A. (5) Corbett, Kevin D. (4) Goodman, Simon L. (4) Harper, J. Wade (4) Harvard-Med (4) Lu, Chafen (4) Mi, Li-Zhi (4) Moody, M. Anthony (4) ...

  14. Center for Nanophase Materials Sciences (CNMS) - CNMS Research

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

    Standing Friedel Waves, Standing Spin Waves, and Indirect Bandgap Optical Transition in Nanostructures Jun-Qiang Lu1, X.-G. Zhang1,2, and Sokrates T. Pantelides3 1Center for...

  15. An Unlikely Route to Ferroelectricity | Advanced Photon Source

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

    memory chips and highly sensitive magnetic field sensors. The crystalline material lutetium-iron-oxide (LuFe2O4) has, in turn, garnered much attention due to its purported...

  16. PHYSICAL SCIENCES, Physics Phase

    Office of Scientific and Technical Information (OSTI)

    SCIENCES, Physics Phase competition in trisected superconducting dome I. M. Vishik, 1, 2 M Hashimoto, 3 R.-H. He, 4 W. S. Lee, 1, 2 F. Schmitt, 1, 2 D. H. Lu, 3 R. G. Moore, 1...

  17. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... and vectors and using parallel linear and non-linear solvers to solve algebraic equations. ... Capacity Value of PV and Wind Generation in the NV Energy System Lu, Shuai ; Diao, ...

  18. News Item

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

    ... Rep. 4, 1 (2014). 20 Y.-J. Lu et al., Nano Lett. 14, 4381 (2014). 21 R.-M. Ma et al., Nat. Nano 9, 600 (2014). 22 X. Meng et al., Laser & Photonics Reviews, doi: 10.1002...

  19. Poster

    Office of Scientific and Technical Information (OSTI)

    HuMiChip: Development of a Functional Gene Array for the Study of Human Microbiomes Qichao Tu 1 , Ye Deng 1 , Lu Lin 12 , Jian Xu 2 , Chris L. Hemme 1 , Zhili He 1 , Jizhong Zhou 1 ...

  20. Adding Nanocavities to Catalyst Surfaces Enhances Chemical Selectivity...

    Office of Science (SC) Website

    made by adding a template during the atomic layer deposition process that is used to ... Publications C. P. Canlas, J. Lu, N. A. Ray, N. A. Grosso-Giordano, J. W. Elam, S. Lee, R. ...

  1. Carbon Dioxide Capture from Air Using Amine-Grafted Porous Polymer...

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

    Carbon Dioxide Capture from Air Using Amine-Grafted Porous Polymer Networks Previous Next List Weigang Lu, Julian P. Sculley, Daqiang Yuan, Rajamani Krishna, and Hong-Cai Zhou, J....

  2. Highly Stable Porous Polymer Networks with Exceptionally High...

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

    Highly Stable Porous Polymer Networks with Exceptionally High Gas-Uptake Capacities Previous Next List Daqiang Yuan, Weigang Lu, Dan Zhao, Hong-Cai Zhou, Adv. Mater., 23: 3723-3725...

  3. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Zhao, Qingbiao (2) Asaba, Tomoya (1) Chung, Duck Young (1) Han, Tian -Heng (1) Kanatzidis, Mercouri G. (1) Lawson, B. J. (1) Lee, Young S. (1) Li, G. (1) Li, Hao (1) Li, Lu (1) Li, ...

  4. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Hussain, Zaheed (1) Ishida, S. (1) Ishikado, M. (1) Lee, Wei-Sheng (1) Lu, Donghui (1) Meevasana, W. (1) Moore, R.G. (1) Sasagawa, T. (1) Schmitt, Felix (1) Shen, Zhi-Xun (1) ...

  5. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... Leuenberger, Dominik (3) Lu, Donghui (3) Mo, Sung-Kwan (3) Moore, Robert G. (3) Pianetta, ... Inna M. ; Yi, Ming ; Chen, Yulin ; Moore, Rob G. ; Shen, Zhi-Xun October 2014 ...

  6. Giant Magneto-Resistance in Epitaxial (La0.7Sr0.3MnO3)0.5 Nanocomposit...

    Office of Scientific and Technical Information (OSTI)

    Authors: Pan, Wei 1 ; Jiang, Y. X. 2 ; Ihlefeld, Jon 3 ; Lu, Ping 3 ; Lee, Stephen R. 3 + Show Author Affiliations Sandia National Lab. (SNL-CA), Livermore, CA...

  7. Search for: All records | DOE PAGES

    Office of Scientific and Technical Information (OSTI)

    Li, Yueqing (1) Liu, Yangang (1) Lu, Chunsong (1) Wu, Xianghua (1) Zhang, Guang J. (1) Save Results Excel (limit 2000) CSV (limit 5000) XML (limit 5000) Have feedback or ...

  8. Publisher's Note: "Modeling a thermionic energy converter using...

    Office of Scientific and Technical Information (OSTI)

    Plasmas 21, 023510 (2014) No abstract prepared. Authors: Lo, F. S. ; Lee, T. H. 1 ; Lu, P. S. 2 ; Ragan-Kelley, B. 3 ; Plasma Theory and Simulation Group, University of ...

  9. Investigation of Microscale Damage Evolution in High Strength...

    Office of Scientific and Technical Information (OSTI)

    Damage Evolution in High Strength A1 Alloy. Authors: Jin, Huiqing ; Lu, Wei-Yang ; Mota, Alejandro ; Foulk, James W., III ; johnson, george Publication Date: 2012-09-01 OSTI...

  10. Investigation of Microscale Damage Evolution in High-Strength...

    Office of Scientific and Technical Information (OSTI)

    Damage Evolution in High-Strength Al Alloy. Authors: Jin, Huiqing ; Lu, Wei-Yang ; Mota, Alejandro ; Foulk, James W., III Publication Date: 2012-10-01 OSTI Identifier: 1072668...

  11. A low cost, high energy density and long cycle life potassium...

    Office of Scientific and Technical Information (OSTI)

    Authors: Lu, Xiaochuan ; Bowden, Mark E. ; Sprenkle, Vincent L. ; Liu, Jun Publication Date: 2015-08-15 OSTI Identifier: 1229967 Report Number(s): PNNL-SA-111546 Journal ID: ISSN ...

  12. Angle-resolved photoemission spectroscopy study of PrFeAsO0.7...

    Office of Scientific and Technical Information (OSTI)

    Authors: Nishi, I. ; Ishikado, M. ; Ideta, S. ; Malaeb, W. ; Yoshida, T. ; Fujimori, A. ; Kotani, Y. ; Kubota, M. ; Ono, K. ; Yi, M. ; Lu, D. H. ; Moore, R. ; Shen, Z.-X. ; Iyo, A. ...

  13. Enhancement of [alpha]-Helix Mimicry by an [alpha/beta]-Peptide...

    Office of Scientific and Technical Information (OSTI)

    Authors: Johnson, Lisa M. ; Mortenson, David E. ; Yun, Hyun Gi ; Horne, W. Seth ; Ketas, Thomas J. ; Lu, Min ; Moore, John P. ; Gellman, Samuel H. 1 ; UMD-NJ) 2 ; Weill-Med) ...

  14. Spin Hall magnetoresistance in CoFe2O4/Pt films (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    Authors: Wu, Hao 1 ; Qintong, Zhang 1 ; Caihua, Wan 1 ; Ali, Syed Shahbaz 1 ; Yuan, Zhonghui 1 ; You, Lu 2 ; Wang, Junling 2 ; Choi, Yongseong 3 ; Han, Xiufeng 1 ...

  15. Jackson Megiatto | Center for Bio-Inspired Solar Fuel Production

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

    Barun Das Bhupesh Goyal Jackson Megiatto Lu Gan Matthieu Koepf Matthieu Walther Sandip Shinde Sudhanshu Sharma Jackson Megiatto Postdoctoral Fellow Subtask 4 project: "Design and Synthesis of Artificial Reaction Centers for Artificial Photoelectrochemical Devices"

  16. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Bauer, E. D. (2) Lu, Xin (2) Chen, G F (1) Chen, Y. (1) Chia, Elbert E M (1) Fisk, Z. (1) ... Tuson ; Thompson, Joe D ; Yuan, Huiqiu ; Chia, Elbert E M ; Chen, G F ; Luo, J L ; Wang, ...

  17. Revealing the Fluctuations of Flexible DNA in 3D | U.S. DOE Office...

    Office of Science (SC) Website

    ... Publications L. Zhang, D. Lei, J. M. Smith, M. Zhang, H. Tong, X. Zhang, Z. Lu, J. Liu, A. P. Alivisatos, and G. Ren. "Three-dimensional structural dynamics and fluctuations of ...

  18. Postdoctoral Associates | Photosynthetic Antenna Research Center

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

    Postdoctoral Associates Postdoctoral Associates Meghan Barnhart-Dailey Postdoctoral Research Associate Read more about Meghan Barnhart-Dailey Reddy Muthyala Nagarjuna Postdoctoral Research Associate Read more about Reddy Muthyala Nagarjuna David Swainsbury Postdoctoral Research Associate Read more about David Swainsbury Amit Mandal Postdoctoral Research Associate Read more about Amit Mandal Xun Lu Postdoctoral Research Associate Read more about Xun Lu Durgesh Rai Postdoctoral Research Associate

  19. Research Highlight

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

    Entrainment Rate in Shallow Cumuli: Probabilistic Distribution and Dependence on Dry Air Sources Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Lu, C., Nanjing University of Information Science and Technology Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Lu C, Y Liu, S Niu, and AM Vogelmann. 2012. "Lateral entrainment rate in shallow cumuli: Dependence on dry air sources and probability density functions."

  20. Research Highlight

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

    Strong Impacts of Vertical Velocity on Cloud Microphysics and Implications for Aerosol Indirect Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Lu, C., Nanjing University of Information Science and Technology Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Lu C, Y Liu, S Niu, and AM Vogelmann. 2012. "Observed impacts of vertical velocity on cloud

  1. Research Highlight

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

    Exploring Parameterization for Turbulent Entrainment-Mixing Processes in Clouds Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Lu, C., Nanjing University of Information Science and Technology Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Lu C, S Niu, S Krueger, and T Wagner. 2013. "Exploring parameterization for turbulent entrainment-mixing processes in

  2. Research Highlight

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

    Light Absorption of Primary Organic Aerosol Paper Named ACS Editors' Choice Download a printable PDF Submitter: Lu, Z., Argonne National Laboratory Streets, D. ., Argonne National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Lu Z, DG Streets, E Winijkul, F Yan, Y Chen, TC Bond, Y Feng, MK Dubey, S Liu, JP Pinto, and GR Carmichael. 2015. "Light absorption properties and radiative effects of primary organic aerosol emissions."

  3. Piano-stool lutetium amido and imido compounds supported by a constrained bis(oxazoline)cyclopentadienyl ligand

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

    Lampland, Nicole L.; Zhu, Jing; Hovey, Megan; Jana, Barun; Ellern, Arkady; Sadow, Aaron D.

    2015-06-25

    {BoMCptet}Lu(CH2Ph)2 (1; BoMCptet = MeC(OxMe2 2C5Me4; OxMe2 = 4,4-dimethyl-2-oxazoline) was prepared in 95% yield from the reaction of BoMCptetH and Lu(CH2Ph)3THF3. Compound 1 reacts with 1 or 2 equiv of H2NCH2R (R = C6H5, 1-C10H7) to give the corresponding imido complexes [{BoMCptet}LuNCH2R]2 (R = C6H5 (2a), 1-C10H7 (2b)) or amido complexes {BoMCptet}Lu(NHCH2R)2 (R = C6H5 (3a), 1-C10H7 (3b)). When isolated, the imido species are insoluble in nonprotic organic solvents. Crystallographic characterization reveals dimeric [{BoMCptet}LuNCH2(1-C10H7)]2 in the solid state. The reaction of 1 and NH3B(C6F5)3 affords crystallographically characterized {BoMCptet}Lu{NHB(C6F5)2}C6F5. This species is proposed to form via a transient lutetium imido, whichmore » undergoes C6F5 migration to the lutetium center.« less

  4. Unsymmetric ordering using a constrained Markowitz scheme

    SciTech Connect (OSTI)

    Amestoy, Patrick R.; Xiaoye S.; Pralet, Stephane

    2005-01-18

    We present a family of ordering algorithms that can be used as a preprocessing step prior to performing sparse LU factorization. The ordering algorithms simultaneously achieve the objectives of selecting numerically good pivots and preserving the sparsity. We describe the algorithmic properties and challenges in their implementation. By mixing the two objectives we show that we can reduce the amount of fill-in in the factors and reduce the number of numerical problems during factorization. On a set of large unsymmetric real problems, we obtained the median reductions of 12% in the factorization time, of 13% in the size of the LU factors, of 20% in the number of operations performed during the factorization phase, and of 11% in the memory needed by the multifrontal solver MA41-UNS. A byproduct of this ordering strategy is an incomplete LU-factored matrix that can be used as a preconditioner in an iterative solver.

  5. High Efficiency Organic Solar Cells: December 16, 2009 - February 2, 2011

    SciTech Connect (OSTI)

    Walker, K.; Joslin, S.

    2011-05-01

    Details on the development of novel organic solar cells incorporating Trimetasphere based acceptors are presented including: baseline performance for Lu-PCBEH acceptor blended with P3HT demonstrated at 4.89% PCE exceeding the 4.5% PCE goal; an increase of over 250mV in Voc was demonstrated for Lu-PCBEH blended with low band gap polymers compared to a comparable C60-PCBM device. The actual Voc was certified at 260mV higher for a low band gap polymer device using the Lu-PCBEH acceptor; and the majority of the effort was focused on development of a device with over 7% PCE. While low current and fill factors suppressed overall device performance for the low band gap polymers tested, significant discoveries were made that point the way for future development of these novel acceptor materials.

  6. SherryLi.pptx

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

    for SuperLU a nd T OORSES X. S herry L i Scien0fic C ompu0ng G roup, L BNL NERSC ASCR Requirements for 2017 January 15, 2014 LBNL 1. P roject D escrip0on ( 1 o f 2 ) PI: S herry L i, L BNL * Summarize y our p roject(s) a nd i ts s cien0fic o bjec0ves through 2 017 * SuperLU i s a d irect s olver l ibrary f or s parse l inear s ystems * Most p arallel o ne i s SuperLU_DIST, M PI---only a t p resent * Many u sers: 2 7,403 d ownloads i n F Y13 * Included i n C ray's LibSci, F EMLAB, H P's M athLib,

  7. Structural and Crystal Chemical Properties of Alkali Rare-earth Double Phosphates

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

    Farmer, James Matthew; Boatner, Lynn A.; Chakoumakos, Bryan C.; Rawn, Claudia J.; Richardson, Jim

    2016-01-01

    When appropriately activated, alkali rare-earth double phosphates of the form: M3RE(PO4)2 (where M denotes an alkali metal and RE represents either a rare-earth element or Y or Sc) are of interest for use as inorganic scintillators for radiation detection at relatively long optical emission wavelengths. These compounds exhibit layered crystal structures whose symmetry properties depend on the relative sizes of the rare-earth and alkali-metal cations. Single-crystal X-ray and powder neutron diffraction methods were used here to refine the structures of the series of rare-earth double phosphate compounds: K3RE(PO4)2 with RE = Lu, Er, Ho, Dy, Gd, Nd, Ce, plus Ymore » and Sc - as well as the compounds: A3Lu(PO4)2, with A = Rb, and Cs. The double phosphate K3Lu(PO4)2 was reported and structurally refined previously. This material had a hexagonal unit cell at room temperature with the Lu ion six-fold coordinated with oxygen atoms of the surrounding phosphate groups. Additionally two lower-temperature phases were observed for K3Lu(PO4)2. The first phase transition to a monoclinic P21/m phase occurred at ~230 K, and the Lu ion retained its six-fold coordination. The second K3Lu(PO4)2 phase transition occurred at ~130 K. The P21/m space group symmetry was retained, however, one of the phosphate groups rotated to increase the oxygen coordination number of Lu from six to seven. This structure then became isostructural with the room-temperature form of the compound K3Yb(PO4)2 reported here that also exhibits an additional high-temperature phase which occurs at T = 120 °C with a transformation to hexagonal P-3 space group symmetry and a Yb-ion coordination number reduction from seven to six. This latter result was confirmed using EXAFS. The single-crystal growth methods structural systematics, and thermal expansion properties of the present series of alkali rare-earth double phosphates, as determined by X-ray and neutron diffraction methods, are treated here.« less

  8. Structural and Crystal Chemical Properties of Alkali Rare-earth Double Phosphates

    SciTech Connect (OSTI)

    Farmer, James Matthew; Boatner, Lynn A.; Chakoumakos, Bryan C.; Rawn, Claudia J.; Richardson, Jim

    2016-01-01

    When appropriately activated, alkali rare-earth double phosphates of the form: M3RE(PO4)2 (where M denotes an alkali metal and RE represents either a rare-earth element or Y or Sc) are of interest for use as inorganic scintillators for radiation detection at relatively long optical emission wavelengths. These compounds exhibit layered crystal structures whose symmetry properties depend on the relative sizes of the rare-earth and alkali-metal cations. Single-crystal X-ray and powder neutron diffraction methods were used here to refine the structures of the series of rare-earth double phosphate compounds: K3RE(PO4)2 with RE = Lu, Er, Ho, Dy, Gd, Nd, Ce, plus Y and Sc - as well as the compounds: A3Lu(PO4)2, with A = Rb, and Cs. The double phosphate K3Lu(PO4)2 was reported and structurally refined previously. This material had a hexagonal unit cell at room temperature with the Lu ion six-fold coordinated with oxygen atoms of the surrounding phosphate groups. Additionally two lower-temperature phases were observed for K3Lu(PO4)2. The first phase transition to a monoclinic P21/m phase occurred at ~230 K, and the Lu ion retained its six-fold coordination. The second K3Lu(PO4)2 phase transition occurred at ~130 K. The P21/m space group symmetry was retained, however, one of the phosphate groups rotated to increase the oxygen coordination number of Lu from six to seven. This structure then became isostructural with the room-temperature form of the compound K3Yb(PO4)2 reported here that also exhibits an additional high-temperature phase which occurs at T = 120 °C with a transformation to hexagonal P-3 space group symmetry and a Yb-ion coordination number reduction from seven to six. This latter result was confirmed using EXAFS. The single

  9. TPSL

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

    TPSL TPSL Description The Cray Third Party Scientific Libraries (TPSL), is a collection of scientific libraries and solvers contaning: MUMPS ParMetis SuperLU, SuperLU_DIST Hypre Scotch Sundials Access The Cray TPSL module is available on the NERSC Cray systems, Cori and Edison. To use: module load cray-tpsl Using TPSL After loading the cray-tpsl module, the compiler wrappers (ftn, cc, CC) will automatically link with the all the included third party libraries. To find out which versions of each

  10. L3:THM.CLS.P6.03

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

    P6.03 ITM/DNS database of drag, lift and wall effects, including the effects of void fractions J. Fang, A.M. Thomas, I. Bolotnov J. Lu G. Tryggvason North Carolina State University Worcester Polytechnic Institute University of Notre Dame June 26, 2013 CASL-U-2013-0062-001 ITM/DNS database of drag, lift and wall effects, including the effects of void fractions L3:THM.CLS.P6.03 milestone report Jun Fang 1 Jiacai Lu 2 Aaron M. Thomas 1 Igor A. Bolotnov 1 Gretar Tryggvason 3 1 North Carolina State