FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Nishimura, AL Mitne-Neto, M Silva, HCA Richieri-Costa, A Oliveira, JRM Cascio, D Yamamoto, LU Vainzof, M Skehel, P Zatz, M AF Nishimura, AL Mitne-Neto, M Silva, HCA Richieri-Costa, A Oliveira, JRM Cascio, D Yamamoto, LU Vainzof, M Skehel, P Zatz, M TI A novel locus for a late onset amyotrophic lateral sclerosis/motor neuron disease variant at 20q13 SO NEUROMUSCULAR DISORDERS LA English DT Meeting Abstract CT 9th International Congress of the World-Muscle-Society CY SEP 01-04, 2004 CL Goteborg, SWEDEN SP World Muscle Soc C1 Univ Sao Paulo, IBUSP, Human Genome Res Ctr, Dept Biol, Sao Paulo, Brazil. Univ Fed Sao Paulo, Sch Med, Anesthesiol Pain & Intens Care Dept, Sao Paulo, Brazil. Univ Sao Paulo, HRAC, Genet Serv, Bauru, Brazil. Univ Calif Los Angeles, David Geffen Med Sch, Dept Neurol, Los Angeles, CA USA. Univ Calif Los Angeles, Inst Mol Biol, DOE, Inst Genom & Proteom, Los Angeles, CA 90024 USA. Univ Edinburgh, Div Neurosci, Edinburgh, Midlothian, Scotland. RI Nishimura, Agnes/B-2905-2011; Richieri-Costa, Antonio/B-2514-2013; Zatz, Mayana/M-5338-2015 OI Zatz, Mayana/0000-0003-3970-8025 NR 0 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0960-8966 J9 NEUROMUSCULAR DISORD JI Neuromusc. Disord. PD SEP PY 2004 VL 14 IS 8-9 BP 563 EP 564 PG 2 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA 847ZQ UT WOS:000223437000024 ER PT J AU Antonioli, P Fienberg, RT Fleurot, F Fukuda, Y Fulgione, W Habig, A Heise, J McDonald, AB Mills, C Namba, T Robinson, LJ Scholberg, K Schwendener, M Sinnott, RW Stacey, B Suzuki, Y Tafirout, R Vigorito, C Viren, B Virtue, C Zichichi, A AF Antonioli, P Fienberg, RT Fleurot, F Fukuda, Y Fulgione, W Habig, A Heise, J McDonald, AB Mills, C Namba, T Robinson, LJ Scholberg, K Schwendener, M Sinnott, RW Stacey, B Suzuki, Y Tafirout, R Vigorito, C Viren, B Virtue, C Zichichi, A TI SNEWS: the SuperNova Early Warning System SO NEW JOURNAL OF PHYSICS LA English DT Article ID NEUTRINO BURST; DETECTOR; SN1987A; COINCIDENCE; LVD AB This paper provides a technical description of the SuperNova Early Warning System (SNEWS), an international network of experiments with the goal of providing an early warning of a galactic supernova. C1 MIT, Dept Phys, Cambridge, MA 02139 USA. Univ Bologna, I-40126 Bologna, Italy. Ist Nazl Fis Nucl, I-40126 Bologna, Italy. Sky & Telescope, Cambridge, MA 02138 USA. Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada. Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan. Univ Turin, CNR Torino, IFSI, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Minnesota, Dept Phys, Duluth, MN 55812 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada. Boston Univ, Dept Phys, Boston, MA 02215 USA. Univ Tokyo, Inst Cosm Ray Res, Chiba 2778582, Japan. Brookhaven Natl Lab, Upton, NY 11973 USA. RP MIT, Dept Phys, Cambridge, MA 02139 USA. EM schol@mit.edu RI Suzuki, Yoichiro/F-7542-2010; fulgione, walter/I-5232-2012; Fulgione, Walter/C-8255-2016 OI Fulgione, Walter/0000-0002-2388-3809 NR 38 TC 96 Z9 96 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 1367-2630 J9 NEW J PHYS JI New J. Phys. PD SEP 1 PY 2004 VL 6 AR 114 DI 10.1088/1367-2630/6/1/114 PG 23 WC Physics, Multidisciplinary SC Physics GA 851BW UT WOS:000223661400001 ER PT J AU Sonzogni, AA AF Sonzogni, AA TI Nuclear data sheets for A=134 SO NUCLEAR DATA SHEETS LA English DT Review ID HIGHLY DEFORMED BANDS; NEUTRON EMISSION PROBABILITIES; RARE-EARTH NUCLEI; HALF-LIFE MEASUREMENTS; GAMMA-RAY INTENSITIES; MIXED-SYMMETRY STATES; BETA-DECAY ENERGIES; DOUBLY MAGIC SN-132; EVEN CE ISOTOPES; DELAYED NEUTRONS AB Experimental data on ground- and excited-state properties for all known nuclei with mass number A = 134 have been compiled and evaluated. States populated in radioactive decay as well is in nuclear reactions have been considered. For these nuclei, level and decay schemes, as well as tables of nuclear properties are given. This work supersedes the 1994 evaluation by Yu.V. Sergeenkov (1994Sc07). Manuscripts published before July 2004 have been included in this work. C1 Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA. RP Sonzogni, AA (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA. NR 272 TC 50 Z9 50 U1 0 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-3752 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD SEP PY 2004 VL 103 IS 1 BP 1 EP + DI 10.1016/j.nds.2004.11.001 PG 181 WC Physics, Nuclear SC Physics GA 879XV UT WOS:000225753500001 ER PT J AU Browne, E AF Browne, E TI Nuclear data sheets for A=211 SO NUCLEAR DATA SHEETS LA English DT Review ID HIGH-SPIN ISOMERS; CORE-EXCITED-STATES; SHELL-MODEL CALCULATIONS; ALPHA-DECAY PROPERTIES; FILLED RECOIL SEPARATOR; ATOMIC MASS EVALUATION; HEAVY-ION REACTIONS; QUADRUPOLE-MOMENTS; MAGNETIC-MOMENTS; LEAD REGION AB Experimental data on ground- and excited-state properties for all known nuclei with mass number A = 134 have been compiled and evaluated. States populated in radioactive decay as well is in nuclear reactions have been considered. For these nuclei, level and decay schemes, as well as tables of nuclear properties are given. This work supersedes the 1994 evaluation by Yu.V. Sergeenkov (1994Sc07). Manuscripts published before July 2004 have been included in this work. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Browne, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 222 TC 6 Z9 6 U1 0 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-3752 EI 1095-9904 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD SEP PY 2004 VL 103 IS 1 BP 183 EP + DI 10.1016/j.nds.2004.11.002 PG 85 WC Physics, Nuclear SC Physics GA 879XV UT WOS:000225753500002 ER PT J AU Strauss, HR Sugiyama, LE Fu, GY Park, W Breslau, J AF Strauss, HR Sugiyama, LE Fu, GY Park, W Breslau, J TI Simulation of two fluid and energetic particle effects in stellarators SO NUCLEAR FUSION LA English DT Article ID TOROIDAL PLASMAS; MAGNETOHYDRODYNAMICS; DESIGN AB MHD and resistive MHD are inadequate to understand the stability of stellarators properly. Ideal MHD ballooning mode theory predicts beta limits substantially below the values that can be expected in experiments. Resistive MHD is even more pessimistic, predicting that many stellarators are completely unstable. Including two fluid effects, ideally and resistively stable stellarator equilibria can be obtained. It may be possible to completely stabilize ballooning modes. The two fluid computations are done with a realistic value of the Hall parameter, the ratio of the ion skin depth to the major radius. Hybrid gyrokinetic simulations with energetic particles indicate that global shear Alfven TAE modes can be more stable in stellarators than in tokamaks. Computations in a two-period compact stellarator obtained a predominantly n = 1 toroidal mode with the expected TAE frequency. The TAE modes are more stable in the two-period compact stellarator than in a tokamak with the same q and pressure profiles. The cause for the stabilization is believed to be the increased damping rate due to 3D geometry. Simulations were performed with the M3D extended MHD code. C1 NYU, New York, NY USA. MIT, Cambridge, MA 02139 USA. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08544 USA. RP Strauss, HR (reprint author), NYU, 550 1St Ave, New York, NY USA. NR 16 TC 10 Z9 10 U1 1 U2 3 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD SEP PY 2004 VL 44 IS 9 BP 1008 EP 1014 AR PII S0029-5515(04)83518-X DI 10.1088/0029-5515/44/9/010 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 860HB UT WOS:000224332000010 ER PT J AU Re, V Kirkby, D Bruinsma, M Berryhill, J Burke, S Callahan, D Campagnari, C Dahmes, B Hale, D Hart, P Kyre, S Levy, S Long, O Mazur, M Richman, J Stoner, J Verkerke, W Beringer, J Beek, T Eisner, AM Grothe, M Lockman, WS Pulliam, T Seiden, A Spradlin, P Walkowiak, W Wilson, M Borean, C Bozzi, C Piemontese, L Breen, AB Brown, D Charles, E Clark, AR Dardin, S Goozen, F Kertb, L Gritsan, A Lynch, G Perazzo, A Roe, NA Zizka, G Lillard, V Roberts, D Brenna, E Citterio, M Lanni, F Palombo, F Ratti, L Manfredi, PF Mandelli, E Angelini, C Batignani, G Bettarini, S Bondioli, M Bosi, F Bucci, F Calderini, G Carpinelli, M Ceccanti, M Forti, F Gagliardi, D Giorgi, MA Lusiani, A Mammini, P Marchiori, G Morganti, M Morsani, F Neri, N Paoloni, E Profeti, A Rama, M Rizzo, G Sandrelli, F Simi, G Walsh, J Elmer, P Burchat, P Cheng, C Edwards, A Meyer, TI Petersen, BA Roat, C Bona, M Bianchi, F Gamba, D Trapani, P Bosisio, L Della Ricca, G Dittongo, S Lanceri, L Rashevskaia, I Vitale, L Vuagnin, G Datta, M Liu, R Mihalyi, A AF Re, V Kirkby, D Bruinsma, M Berryhill, J Burke, S Callahan, D Campagnari, C Dahmes, B Hale, D Hart, P Kyre, S Levy, S Long, O Mazur, M Richman, J Stoner, J Verkerke, W Beringer, J Beek, T Eisner, AM Grothe, M Lockman, WS Pulliam, T Seiden, A Spradlin, P Walkowiak, W Wilson, M Borean, C Bozzi, C Piemontese, L Breen, AB Brown, D Charles, E Clark, AR Dardin, S Goozen, F Kertb, L Gritsan, A Lynch, G Perazzo, A Roe, NA Zizka, G Lillard, V Roberts, D Brenna, E Citterio, M Lanni, F Palombo, F Ratti, L Manfredi, PF Mandelli, E Angelini, C Batignani, G Bettarini, S Bondioli, M Bosi, F Bucci, F Calderini, G Carpinelli, M Ceccanti, M Forti, F Gagliardi, D Giorgi, MA Lusiani, A Mammini, P Marchiori, G Morganti, M Morsani, F Neri, N Paoloni, E Profeti, A Rama, M Rizzo, G Sandrelli, F Simi, G Walsh, J Elmer, P Burchat, P Cheng, C Edwards, A Meyer, TI Petersen, BA Roat, C Bona, M Bianchi, F Gamba, D Trapani, P Bosisio, L Della Ricca, G Dittongo, S Lanceri, L Rashevskaia, I Vitale, L Vuagnin, G Datta, M Liu, R Mihalyi, A TI The BaBar Silicon Vertex Tracker: Performance and radiation damage studies SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 6th International Conference on Large Scale Applications and Radiation Hardness of Semiconductor Detectors CY SEP 29-OCT 01, 2003 CL Florence, ITALY SP Ist Nazl Fis Nucl, Univ Firenze, Dipartimento Fis, Ente Cassa Risparmio Firenze AB The BaBar Silicon Vertex Tracker is a five layers, double sided AC-coupled silicon microstrip detector operating on the PEP-II storage ring at the Stanford Linear Accelerator Center. The performance of the SVT after 4 years of running is described. Results from radiation hardness tests are presented and the implications of the absorbed radiation dose on the SVT lifetime are discussed. (C) 2004 Elsevier B.V. All rights reserved. C1 Ist Nazl Fis Nucl, Pisa, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Bergamo, Bergamo, Italy. Univ Calif Irvine, Irvine, CA USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Lab Accelerateur Lineaire, F-91405 Orsay, France. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Maryland, College Pk, MD 20742 USA. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Milan, I-20122 Milan, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Pavia, I-27100 Pavia, Italy. Univ Pisa, Pisa, Italy. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Princeton Univ, Princeton, NJ 08544 USA. Stanford Univ, Stanford, CA 94305 USA. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Turin, I-10124 Turin, Italy. Ist Nazl Fis Nucl, Trieste, Italy. Univ Trieste, I-34127 Trieste, Italy. Univ Wisconsin, Madison, WI USA. RP Rama, M (reprint author), Ist Nazl Fis Nucl, Pisa, Italy. EM matteo.rama@pi.infn.it RI Rizzo, Giuliana/A-8516-2015; Della Ricca, Giuseppe/B-6826-2013; Levy, Stephen/C-3493-2011; Forti, Francesco/H-3035-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Ratti, Lodovico/I-8836-2012; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016 OI Carpinelli, Massimo/0000-0002-8205-930X; Rizzo, Giuliana/0000-0003-1788-2866; Re, Valerio/0000-0003-0697-3420; Della Ricca, Giuseppe/0000-0003-2831-6982; Kirkby, David/0000-0002-8828-5463; Bettarini, Stefano/0000-0001-7742-2998; RATTI, LODOVICO/0000-0003-1906-1076; Paoloni, Eugenio/0000-0001-5969-8712; Lanceri, Livio/0000-0001-8220-3095; Forti, Francesco/0000-0001-6535-7965; Neri, Nicola/0000-0002-6106-3756; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288 NR 7 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 2004 VL 530 IS 1-2 BP 7 EP 11 DI 10.1016/j.nima.2004.05.038 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 852UT UT WOS:000223782800003 ER PT J AU Hanagaki, K AF Hanagaki, K TI Design of an upgraded DO silicon microstrip tracker for Run IIb at the tevatron SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 6th International Conference on Large Scale Applications and Radiation Hardness of Semiconductor Detectors CY SEP 29-OCT 01, 2003 CL Florence, ITALY SP Ist Nazl Fis Nucl, Univ Firenze, Dipartimento Fis, Ente Cassa Risparmio Firenze DE silicon tracker; flex printed circuit cable ID DETECTOR AB The DO collaboration planned to upgrade the Silicon Tracker to withstand the radiation dose corresponding to above 2 fb(-1) of data. This new detector was designed to be functional up to at least 15 fb(-1). We report on the design of the new Silicon Tracker with details of the innermost layer. (C) 2004 Elsevier B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Hanagaki, K (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM kazu@fnal.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 2004 VL 530 IS 1-2 BP 12 EP 16 DI 10.1016/j.nima.2004.05.039 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 852UT UT WOS:000223782800004 ER PT J AU Menichelli, D Scaringella, M Miglio, S Bruzzi, M Li, Z Fretwurst, E Pintilie, I AF Menichelli, D Scaringella, M Miglio, S Bruzzi, M Li, Z Fretwurst, E Pintilie, I TI Influence of deep levels on space charge density at different temperatures in gamma-irradiated silicon SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 6th International Conference on Large Scale Applications and Radiation Hardness of Semiconductor Detectors CY SEP 29-OCT 01, 2003 CL Florence, ITALY SP Ist Nazl Fis Nucl, Univ Firenze, Dipartimento Fis, Ente Cassa Risparmio Firenze DE oxygenated silicon; particle detectors; gamma-rays; current transient; thermally stimulated currents; space charge sign inversion ID OXYGEN-ENRICHED SILICON; RADIATION-DAMAGE; DEFECT LEVELS; DETECTORS; STANDARD; CAPACITANCE; DIODES AB In this work, it is shown that the analysis of thermally stimulated currents (TSC) and current transients (CT) at constant temperature can be a suitable tool to study the influence of deep levels on space charge density N(T) in irradiated silicon diodes. In particular, the occurrence of space charge sign inversion (SCSI) can be related to signal discontinuities in TSC and CT measurements. This approach has been adopted in this work to study devices made of standard Float Zone (FZ) and Diffusion Oxygenated Float Zone silicon, irradiated by gamma-rays up to a dose of 300 Mrad. Our study shows that all the samples are inverted at 50 K after a low-temperature excitation. Several space charge sign inversions, from positive to negative and vice versa, have been observed between cryogenic and room temperature, and have been related to carriers emission from dominating deep traps. Only standard FZ silicon remains inverted at room temperature after a dose of 300 Mrad. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Florence, Dipartimento Energet, I-50139 Florence, Italy. Ist Nazl Fis Nucl, Florence Div, I-50019 Sesto F Firenze, Italy. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany. Natl Inst Mat Phys, Bucharest 76900, Romania. RP Univ Florence, Dipartimento Energet, Via S Marta 3, I-50139 Florence, Italy. EM menichelli@ingfi1.ing.unifi.it RI Pintilie, Ioana/C-4545-2011; Bruzzi, Mara/K-1326-2015 OI Bruzzi, Mara/0000-0001-7344-8365 NR 32 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 2004 VL 530 IS 1-2 BP 139 EP 145 DI 10.1016/j.nima.2004.05.062 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 852UT UT WOS:000223782800027 ER PT J AU Bloom, ED AF Bloom, ED TI The search for dark matter via gamma rays from astronomical sources using EGRET and GLAST SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 2nd International Conference on Particle and Fundamental Physics in Space CY DEC 10-12, 2003 CL Washington, DC SP NASA ID DENSITY; HALOS AB EGRET, aboard NASA's CGRO satellite, has made important contributions to establishing Emits on WIMP dark matter in the galaxy. This paper will review these EGRET results. Based on past Emits and theoretical estimates, future potential dark matter results from GLAST are projected. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Bloom, ED (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 22 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD SEP PY 2004 VL 134 BP 103 EP 111 DI 10.1016/j.nuclphysbps.2004.08.016 PG 9 WC Physics, Particles & Fields SC Physics GA 873MI UT WOS:000225284000017 ER PT J AU Damazio, DO Falcone, T Mehta, NL Takai, H AF Damazio, DO Falcone, T Mehta, NL Takai, H TI A simple and cost-effective passive radar technique for ultra high energy cosmic ray detection SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 2nd International Conference on Particle and Fundamental Physics in Space CY DEC 10-12, 2003 CL Washington, DC SP NASA C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. SUNY Stony Brook, Stony Brook, NY 11974 USA. Cornell Univ, Ithaca, NY 14583 USA. RP Damazio, DO (reprint author), Brookhaven Natl Lab, Dept Phys, Bldg 510A, Upton, NY 11973 USA. NR 3 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD SEP PY 2004 VL 134 BP 217 EP 219 DI 10.1016/j.nuclphysbps.2004.08.034 PG 3 WC Physics, Particles & Fields SC Physics GA 873MI UT WOS:000225284000036 ER PT J AU Dunn, ME Leal, LC AF Dunn, ME Leal, LC TI Calculating probability tables for the unresolved-resonance region using Monte Carlo methods SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB A new module, Probability tables for the Unresolved Region using Monte Carlo (PURM), has been developed for the AMPX-2000 cross-section-processting system. PURM uses a Monte Carlo approach to calculate probability tables on an evaluator-defined energy grid in the unresolved-resonance region. For each probability table, PURM samples a Wigner spacing distribution for pairs of resonances surrounding the reference energy (i.e., energy specified in the cross-section evaluation). The resonance distribution is sampled for each spin sequence (i.e., l-J pair), and PURM uses the Delta(3)-statistics test to determine the number of resonances to sample for each spin sequence. For each resonance, PURM samples the resonance widths from a chi-square distribution for a specified number of degrees of freedom. Once the resonance parameters are sampled, PURM calculates the total, capture, fission, and scatter cross sections at the reference energy using the single-level Breit-Wigner formalism with appropriate treatment for temperature effects. Probability tables have been calculated and compared with NJOY The probability tables and cross-section values that are calculated by PURM and NJOY are in agreement, and the verification studies with NJOY establish the computational capability for generating probability tables using the new AMPX module PURM. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Dunn, ME (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA. EM dunnme@ornl.gov NR 13 TC 3 Z9 3 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD SEP PY 2004 VL 148 IS 1 BP 30 EP 42 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 853MG UT WOS:000223831100003 ER PT J AU Oh, SY Chang, J Leal, LC AF Oh, SY Chang, J Leal, LC TI Statistical assignment of neutron orbital angular momentum to a resonance SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID PARAMETERS; WIDTHS AB We have derived formulas in a general form for suggesting the neutron orbital angular momentum quantum number l to each neutron resonance if it is not identified experimentally. By assuming the (2J + 1) law of level density, these general formulas are reduced to the formulas found in previous works. The suggestion of l is based on the probability that a resonance having a certain value of gGamma(n) is an l-wave resonance. The probability is calculated from the Bayes theorem on conditional probability. For each 1, the probability density function (pdf) of gGamma(n) was derived from the X-2 distribution proposed by Porter and Thomas. The pdf takes into account two possible channel spins that result in the same total spin for a given l larger than zero. Meanwhile, regardless of the resolution of measurement, we suggest adopting the level density as the prior probability in the Bayesian approach, as Gyulassy et al. did. As a sample problem, we presented the result of l-assignment for Ag-109 resonances. The SUGGEL code, in which the methodology is incorporated, correctly assigned l's for 67 among 70 resonances for which l's had been determined experimentally. The other test for Al-27 showed the applicability of the code as a preanalysis tool, even though such applicability is limited to a certain extent for light nuclides. The use of the code SUGGEL is expected to reduce the number of repeated runs of a fitting code such as SAMMY thus reducing time and effort for the extraction of resonance parameters from measurements. C1 Korea Atom Energy Res Inst, Taejon 305600, South Korea. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Oh, SY (reprint author), Korea Atom Energy Res Inst, POB 105, Taejon 305600, South Korea. EM syoh@kaeri.re.kr NR 22 TC 3 Z9 3 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD SEP PY 2004 VL 148 IS 1 BP 43 EP 49 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 853MG UT WOS:000223831100004 ER PT J AU Soule, R Assal, W Chaussonnet, P Destouches, C Domergue, C Jammes, C Laurens, JM Lebrat, JF Mellier, F Perret, G Rimpault, G Serviere, H Imel, G Thomas, GM Villamarin, D Gonzalez-Romero, E Plaschy, M Chawla, R Kloosterman, JL Rugama, Y Billebaud, A Brissot, R Heuer, D Kerveno, M Le Brun, C Liatard, E Loiseaux, JM Meplan, O Merle, E Perdu, F Vollaire, J Baeten, P AF Soule, R Assal, W Chaussonnet, P Destouches, C Domergue, C Jammes, C Laurens, JM Lebrat, JF Mellier, F Perret, G Rimpault, G Serviere, H Imel, G Thomas, GM Villamarin, D Gonzalez-Romero, E Plaschy, M Chawla, R Kloosterman, JL Rugama, Y Billebaud, A Brissot, R Heuer, D Kerveno, M Le Brun, C Liatard, E Loiseaux, JM Meplan, O Merle, E Perdu, F Vollaire, J Baeten, P TI Neutronic studies in support of accelerator-driven systems: The MUSE experiments in the MASURCA facility SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID ALPHA AB The MUSE program (multiplication with an external source) is in progress at the MASURCA critical facility at the Cadarache Research Center of the Commissariat a l'Energie Atomique in France. The program is dedicated to the physics studies of accelerator-driven systems in support of transmutation studies of minor actinides and long-lived fission products. It began in 1995 with the coupling of a Cf source in MASURCA and was followed by a commercial (d,T) source. In 2001, a specially constructed (d,D)/(d, neutron generator (GENEPI) was placed in MASURCA and the MUSE-4 program commenced. We describe the first phases of the MUSE-4 program, with data presented that were obtained up to about the summer of 2002. We present some results from the "reference" configuration, which can operate at critical. We present traverses of measured fission reaction rates, with comparison to calculations. Also in the reference configuration, we performed activation foil measurements and present these results compared to calculations. Because a major objective of the MUSE program is to test and qualify methods of subcritical reactivity measurement, we have devoted a major portion of our studies to this area. We have used classical methods (rod drop, source multiplication) to attempt to measure the subcritical level. In these early phases we studied core configurations of around k(eff) = 0.995. Deeper subcriticality (k(eff) = 0.96) was achieved by inserting a safety rod. In addition to the methods mentioned above, we have devoted a lot of effort to pulse neutron source, fluctuation (Rossi-alpha and Feynman-alpha), and transfer function methods (e.g., cross-power spectral density). We present our preliminary results of all the methods, with some discussion regarding cross comparison. C1 CEN Cadarache, F-13108 St Paul Les Durance, France. Argonne Natl Lab W, Idaho Falls, ID 83403 USA. BNFL, Springfields Work, Preston, Lancs, England. CIEMAT, E-28040 Madrid, Spain. Paul Scherrer Inst, CH-5232 Villigen, Switzerland. Delft Univ Technol, Interfac Reactor Inst, NL-2629 JB Delft, Netherlands. Univ Grenoble 1, CNRS, IN2P3, LPSC, F-38026 St Martin Dheres, France. RP Billebaud, A (reprint author), CEN Cadarache, F-13108 St Paul Les Durance, France. EM billebaud@lpsc.in2p3.fr RI Perdu, Fabien/B-5592-2012; Jammes, Christian/H-3245-2013; Gonzalez Romero, Enrique/L-7561-2014 OI Perdu, Fabien/0000-0002-4553-3930; Jammes, Christian/0000-0002-5970-7719; Gonzalez Romero, Enrique/0000-0003-2376-8920 NR 34 TC 79 Z9 81 U1 1 U2 10 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD SEP PY 2004 VL 148 IS 1 BP 124 EP 152 PG 29 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 853MG UT WOS:000223831100011 ER PT J AU Todreas, NE MacDonald, PE Hejzlar, P Buongiorno, J Loewen, EP AF Todreas, NE MacDonald, PE Hejzlar, P Buongiorno, J Loewen, EP TI Medium-power lead-alloy reactors: Missions for this reactor technology SO NUCLEAR TECHNOLOGY LA English DT Article DE lead-alloy-cooled; fast reactors; passive safety; actinide burning AB multiyear project at the Idaho National Engineering and Environmental Laboratory and the Massachusetts Institute of Technology investigated the potential of medium-power lead-alloy-cooled technology to perform two missions: (1) the production of low-cost electricity and (2) the burning of actinides from light water reactor (LWR) spent fuel. The goal of achieving a high power level to enhance economic performance simultaneously with adoption of passive decay heat removal and modularity capabilities resulted in designs in the range of 600-800 MW(thermal), which we classify as a medium power level compared to the lower [similar to100 MW(thermal)] and higher [2800 MW(thermal)] power ratings of other lead-alloy-cooled designs. The plant design that was developed shows promise of achieving all the Generation-IV goals for future nuclear energy systems: sustainable energy generation, low overnight capital cost, a very low likelihood and degree of core damage during any conceivable accident, and a proliferation-resistant fuel cycle. The reactor and fuel cycle designs that evolved to achieve these missions and goals resulted from study of the following key trade-offs: waste reduction versus reactor safety, waste reduction versus cost, and cost versus proliferation resistance. Secondary trade-offs that were also considered were monolithic versus modular design, active versus passive safety systems, forced versus natural circulation, alternative power conversion cycles, and lead versus lead-bismuth coolant. These studies led to a selection of a common modular design with forced convection cooling, passive decay heat removal, and a supercritical CO2 power cycle for all our reactor concepts. However, the concepts adopt different core designs to optimize the achievement of the two missions. For the low-cost electricity production mission, a design approach based on fueling with low enriched uranium operating without costly reprocessing in a once-through cycle was pursued to achieve a long operating cycle length by enhancing in-core breeding. For the actinide-burning mission three design variants were produced: (1) a fertile-free actinide burner, i.e., a single-tier strategy, (2) a minor actinide burner with plutonium burned in the LWR fleet, i.e., a two-tier strategy, and (3) an actinide burner with characteristics balanced to also favor economic electricity production. C1 MIT, Cambridge, MA 02139 USA. Bechtel BWXT Idaho, INEEL, Idaho Falls, ID 83415 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Todreas, NE (reprint author), MIT, Room 24-205,77 Massachusetts Ave, Cambridge, MA 02139 USA. EM todreas@mit.edu NR 42 TC 12 Z9 12 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 305 EP 320 PG 16 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300002 ER PT J AU Hejzlar, P Buongiorno, J Macdonald, PE Todreas, NE AF Hejzlar, P Buongiorno, J Macdonald, PE Todreas, NE TI Design strategy and constraints for medium-power lead-alloy-cooled actinide burners SO NUCLEAR TECHNOLOGY LA English DT Article DE lead-alloy coolant; actinide burners; fast reactor ID CORE DESIGN; REACTOR; BEHAVIOR; FUEL AB We outline the strategy and constraints adopted for the design of medium-power lead-alloy-cooled actinide-burning reactors that strive for a lower cost than accelerator-driven systems and for robust safety. Reduced cost is pursued through the use of (1) a modular design and maximum power rating to capitalize on an economy of scale within the constraints imposed by modularity, (2) a very compact and simple supercritical-CO2 power cycle, and (3) simplifications of the primary system allowed by the use of lead coolant. Excellent safety is pursued by adopting the integral fast reactor approach of achieving a self-controllable reactor that responds to all key abnormal occurrences, including anticipated transients without scrams, by a safe shutdown without exceeding core integrity limits. The three concepts developed are the fertile-free actinide burner for incineration of all transuranics from light water reactor (LWR) spent fuel, the fertile-free minor actinide (MA) burner for preferential burning of MAs working in tandem with LWRs or gas-cooled thermal reactors, and the actinide burner with thorium fuel aimed also at reducing the electricity generation costs through longer-cycle operation. C1 MIT, Cambridge, MA 02139 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Hejzlar, P (reprint author), MIT, Room 24-215,77 Massachusetts Ave, Cambridge, MA 02139 USA. EM hejzlar@mit.edu NR 56 TC 17 Z9 17 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 321 EP 343 PG 23 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300003 ER PT J AU Hejzlar, P Davis, CB AF Hejzlar, P Davis, CB TI Performance of the lead-alloy-cooled reactor concept balanced for actinide burning and electricity production SO NUCLEAR TECHNOLOGY LA English DT Article DE actinide incineration; lead-cooled fast reactors; thorium fuel ID BURNER REACTOR; BISMUTH; PHYSICS; FUEL AB A lead-bismuth-cooled fast reactor concept targeted for a balanced mission of actinide burning and low-cost electricity production is proposed and its performance analyzed. The design explores the potential benefits of thorium-based fuel in actinide-burning cores, in particular in terms of the reduction of the large reactivity swing and enhancement of the small Doppler coefficient typical of fertile-free actinide burners. Reduced electricity production cost is pursued through a longer cycle length than that used for fertile-free burners and thus a higher capacity factor. It is shown that the concept can achieve a high transuranics destruction rate, which is only 20% lower than that of an accelerator driven system with fertile-free fuel. The small negative fuel temperature reactivity coefficient, small positive coolant temperature reactivity coefficient, and negative core radial expansion coefficient provide self-regulating characteristics so that the reactor is capable of inherent shutdown during major transients without scram, as in the Integral Fast Reactor. This is confirmed by thermal-hydraulic analysis of several transients without scram, including primary coolant pump trip, station blackout, and reactivity step insertion, which showed that the reactor was able to meet all identified thermal limits. However, the benefits of high actinide consumption and small reactivity swing can be attained only if the uranium from the discharged fuel is separated and not recycled. This additional uranium separation step and thorium reprocessing significantly increase the fuel cycle costs. Because the higher fuel cycle cost has a larger impact on the overall cost of electricity than the savings from the higher capacity factor afforded through use of thorium, this concept appears less promising than the fertile-free actinide burners. C1 MIT, Cambridge, MA 02139 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Hejzlar, P (reprint author), MIT, Room 24-304,77 Massachusetts Ave, Cambridge, MA 02139 USA. EM hejzlar@mit.edu NR 47 TC 10 Z9 10 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 344 EP 367 PG 24 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300004 ER PT J AU Dostal, V Hejzlar, P Todreas, NE AF Dostal, V Hejzlar, P Todreas, NE TI Medium-power lead-alloy fast reactor balance-of-plant options SO NUCLEAR TECHNOLOGY LA English DT Article DE power cycles; heat exchangers; lead-alloy-cooled reactors AB Proper selection of the power conversion cycle is a very important step in the design of a nuclear reactor. Due to the higher core outlet temperature (similar to550degreesC) compared to that of light water reactors (similar to300degreesC), a wide portfolio of power cycles is available for the lead alloy fast reactor (LFR). Comparison of the following cycles for the LFR was performed: superheated steam (direct and indirect), supercritical steam, helium Brayton, and supercritical CO2 (S-CO2) recompression. Heat transfer from primary to secondary coolant was first analyzed and then the steam generators or heat exchangers were designed. The direct generation of steam in the lead alloy coolant was also evaluated. The resulting temperatures of the secondary fluids are in the range of 530-545degreesC, dictated by the fixed space available for the heat exchangers in the reactor vessel. For the direct steam generation situation, the temperature is 312degreesC. Optimization of each power cycle was carried out, yielding net plant efficiency of around 40% for the superheated steam cycle while the supercritical steam and S-CO2 cycles achieved net plant efficiency of 41%. The cycles were then compared based on their net plant efficiency and potential for low capital cost. The superheated steam cycle is a very good candidate cycle given its reasonably high net plant efficiency and ease of implementation based on the extensive knowledge and operating experience with this cycle. Although the supercritical steam cycle net plant efficiency is slightly better than that of the superheated steam cycle, its high complexity and high pressure result in higher capital cost, negatively affecting plant economics. The helium Brayton cycle achieves low net plant efficiency due to the low lead alloy core outlet temperature, and therefore, even though it is a simpler cycle than the steam cycles, its performance is mediocre in this application. The prime candidate, however, appears to be the S-CO2 recompression cycle, because it achieves about the same net plant efficiency as the supercritical steam cycle and is significantly simpler than the steam cycles. Moreover, the S-CO2 cycle offers a significantly higher potential for an increase in efficiency than steam cycles, after better materials allow the LFR operating temperatures to be increased. Therefore, the S-CO2 is chosen as the reference cycle for the LFR, with the superheated or supercritical steam cycles as backups if the S-CO2 cycle development efforts do not succeed. C1 MIT, Cambridge, MA 02139 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Dostal, V (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM dostal@mit.edu NR 29 TC 8 Z9 8 U1 1 U2 4 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 388 EP 405 PG 18 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300006 ER PT J AU Buongiorno, J Loewen, EP Czerwinski, K Larson, C AF Buongiorno, J Loewen, EP Czerwinski, K Larson, C TI Studies of polonium removal from molten lead-bismuth for lead-alloy-cooled reactor applications SO NUCLEAR TECHNOLOGY LA English DT Article DE polonium; fast reactors; lead-bismuth ID COOLANT; SYSTEMS; PO-210 AB The isotope Po-210 is the main product of neutron activation in fast reactors cooled by molten lead-bismuth eutectic (LBE). The isotope Po-210 is a pure alpha emitter with a half-life of 138.38 days. For typical values of the neutron flux the Po-210 concentration in the coolant can reach 1-10 Ci/kg. While exposure of plant personnel to Po is prevented under normal operating conditions because the primary system is sealed, Po does pose a radiological hazard during maintenance activities for which access to submerged structures is required as well as during accidents resulting in breach of the primary-system barrier. Obviously, continuous removal of Po from the LBE reduces this hazard. Therefore, it is important to understand the mechanisms by which Po is formed in and released from the LBE. We summarize research performed at the Idaho National Engineering and Environmental Laboratory and the Massachusetts Institute of Technology to investigate the basic chemistry of four mechanisms of Po release, which could serve as the basis for a coolant cleanup system in LBE-cooled reactors. The mechanisms explored are lead polonide evaporation, formation of polonium hydride, rare-earth filtering, and alkaline extraction. For the key chemical species involved expressions are given for useful quantities such as formation energy, release, and deposition rates. It is concluded that the most promising removal mechanism is alkaline extraction, although a more systematic investigation of this mechanism is needed. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. MIT, Cambridge, MA 02139 USA. RP Buongiorno, J (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM jacopo@mit.edu NR 28 TC 14 Z9 14 U1 1 U2 10 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 406 EP 417 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300007 ER PT J AU Loewen, EP Ballinger, RG Lim, J AF Loewen, EP Ballinger, RG Lim, J TI Corrosion studies in support of a medium-power lead-alloy-cooled reactor SO NUCLEAR TECHNOLOGY LA English DT Article DE lead corrosion; lead-bismuth corrosion; LBE corrosion ID BISMUTH; STEELS; OXYGEN AB The performance of structural materials in lead or lead-bismuth eutectic (LBE) systems is evaluated. The materials evaluated included refractory metals (W, Mo, and Ta), several U.S. steels [austenitic steel (316L), carbon steels (F-22, Fe-Si), ferritic/martensitic steels (HT-9 and 410)], and several experimental Fe-Si-Cr alloys that were expected to demonstrate corrosion resistance. The materials were exposed in either an LBE rotating electrode or a dynamic corrosion cell for periods from 100 to 1000 h at temperatures of 400, 500, 600, and 700degreesC, depending on material and exposure location. Weight change and optical scanning electron microscopy or X-ray analysis of the specimen were used to characterize oxide film thickness, corrosion depth, microstructure, and composition changes. The results of corrosion tests validate the excellent resistance of refractory metals (W, Ta, and Mo) to LBE corrosion. The tests conducted with stainless steels (410, 316L, and HT-9) produced mass transfer of elements (e.g., Ni and Cr) into the LBE, resulting in degradation of the material. With Fe-Si alloys a Si-rich layer (as SiO2) is formed on the surface during exposure to LBE from the selective dissolution of Fe. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. MIT, Cambridge, MA 02139 USA. RP Loewen, EP (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM loewep@inel.gov NR 31 TC 6 Z9 6 U1 1 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 436 EP 456 PG 21 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300009 ER PT J AU Weaver, KD Macdonald, PE AF Weaver, KD Macdonald, PE TI A qualitative reactivity and isotopic assessment of fuels for lead-alloy-cooled fast reactors SO NUCLEAR TECHNOLOGY LA English DT Article DE fast reactors; nuclear fuel; heavy metal coolant AB Various methods have been proposed to transmute and thus consume the current inventory of transuranic waste from spent light water reactor (LWR) fuel and plutonium from weapons. We discuss the neutronics performance of nonfertile, fertile metallic, and fertile nitride fuels loaded with 20 to 30 wt% LWR-grade plutonium plus minor actinides and burned in an open-lattice lead-alloy-cooled fast reactor, with an emphasis on the fuel cycle life and spent fuel isotopic content. As a comparison, similar fuel was also studied in a sodium cooled fast reactor. Our calculations show that the average actinide burn rate for fertile-free fuel is similar for both the sodium- and lead-bismuth-cooled cases, ranging from 1.02 to 1.16 g/MWd, compared to a typical LWR actinide generation rate of 0.303 g/MWd. In addition, our calculations show that the effective full-power days (EFPDs) of operation (or equivalent reactivity-limited burnup) using fertile fuel can extend beyond 20 yr, and the average actinide burn rate is similar for both the sodium- and lead-bismuth-cooled cases, ranging from 0.5 to 0.9 g/MWd. Using the same parameters (i.e., a large pitch-to-diameter ratio, same linear power, and fissile/fertile loading, etc.), the lead-alloy-cooled cases had an EFPD that was 18% to several times greater than their sodium-cooled counterparts. However, tight sodium-cooled lattices are equivalent to the looser lead-alloy lattices in terms Of beginning-of-life excess reactivity. C1 Idaho Natl Engn & Environm Lab, Adv Nucl Energy Programs, Idaho Falls, ID 83415 USA. RP Weaver, KD (reprint author), Idaho Natl Engn & Environm Lab, Adv Nucl Energy Programs, POB 1625, Idaho Falls, ID 83415 USA. EM weavkd@inel.gov NR 16 TC 2 Z9 2 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 2004 VL 147 IS 3 BP 457 EP 469 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 856LS UT WOS:000224047300010 ER PT J AU Peters, DPC Herrick, JE Urban, DL Gardner, RH Breshears, DD AF Peters, DPC Herrick, JE Urban, DL Gardner, RH Breshears, DD TI Strategies for ecological extrapolation SO OIKOS LA English DT Article ID SURFACE FIRE REGIMES; CLIMATE-CHANGE; HABITAT FRAGMENTATION; SPATIAL SCALES; UNITED-STATES; GREAT-PLAINS; SOIL-EROSION; LAND-USE; MODELS; FOREST C1 New Mexico State Univ, USDA ARS, Jornada Expt Range, Las Cruces, NM 88003 USA. Duke Univ, Nicholas Sch Environm & Earth Sci, Durham, NC 27708 USA. Univ Maryland, Ctr Environm Sci, Appalachian Lab, Frostburg, MD 21532 USA. Los Alamos Natl Lab, Atmosphere Climate & Environm Dynam Grp EES2, Los Alamos, NM 87545 USA. RP Peters, DPC (reprint author), New Mexico State Univ, USDA ARS, Jornada Expt Range, Box 30003,MSC 3JER, Las Cruces, NM 88003 USA. EM debpeter@nmsu.edu RI Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 78 TC 43 Z9 44 U1 1 U2 20 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0030-1299 EI 1600-0706 J9 OIKOS JI Oikos PD SEP PY 2004 VL 106 IS 3 BP 627 EP 636 DI 10.1111/j.0030-1299.2004.12869.x PG 10 WC Ecology SC Environmental Sciences & Ecology GA 838OH UT WOS:000222722200021 ER PT J AU Romine, MF Elias, DA Monroe, ME Auberry, K Fang, RH Fredrickson, JK Anderson, GA Smith, RD Lipton, MS AF Romine, MF Elias, DA Monroe, ME Auberry, K Fang, RH Fredrickson, JK Anderson, GA Smith, RD Lipton, MS TI Validation of Shewanella oneidensis MR-1 small proteins by AMT tag-based proteome analysis SO OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY LA English DT Article ID PUTREFACIENS MR-1; REDUCTION; GENOMES; GENES; ORFS; ELFS AB Using stringent criteria for protein identification by accurate mass and time (AMT) tag mass spectrometric methodology, we detected 36 proteins of 101 amino acids in length, including 10 that were annotated as hypothetical proteins, in 172 global tryptic digests of Shewanella oneidensis MR-1 proteins. Peptides that map to the conserved, but functionally uncharacterized proteins SO4134 and SO2787, were the most frequently detected peptides in these samples, while those that map to hypotheticals SO2669 and SO2063, conserved hypotheticals SO0335 and SO2176, and the SlyX protein (SO1063) were observed at frequencies similar to those from essential small proteins (ribosomal proteins and translation. initiation factor IF-1), suggesting that they may function in similarly important cellular functions. In addition, peptides were detected that map to 30 genes predicted to encode frameshifts, point mutations, or recoding signals. Of these 30 genes, peptides that map to positions beyond internal stop codons were detected in 13 genes (SO0101, SO0419, SO0590, SO0738, SO1113, SO1211, SO3079, SO3130, SO3240, SO4231, SO4328, SO4422, and SO4657). While expression of the full-length formate dehydrogenase encoded by SO0101 can be explained by incorporation of selenocysteine at the internal stop codon, the mechanism of translating downstream sequences in the remaining genes remains unknown. C1 Pacific NW Natl Lab, Environm & Mol Sci Lab, Div Biol Separat & Mass Spectrometry, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Sci & Expt Resources, Richland, WA 99352 USA. RP Lipton, MS (reprint author), Pacific NW Natl Lab, Environm & Mol Sci Lab, Div Biol Separat & Mass Spectrometry, Richland, WA 99352 USA. EM Mary.Lipton@pnl.gov RI Elias, Dwayne/B-5190-2011; Smith, Richard/J-3664-2012 OI Elias, Dwayne/0000-0002-4469-6391; Smith, Richard/0000-0002-2381-2349 NR 20 TC 41 Z9 42 U1 0 U2 2 PU MARY ANN LIEBERT INC PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 USA SN 1536-2310 J9 OMICS JI OMICS PD FAL PY 2004 VL 8 IS 3 BP 239 EP 254 DI 10.1089/omi.2004.8.239 PG 16 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA 867IQ UT WOS:000224836700006 PM 15669716 ER PT J AU Konemann, J Li, YJ Parekh, O Sinha, A AF Konemann, J Li, YJ Parekh, O Sinha, A TI An approximation algorithm for the edge-dilation k-center problem SO OPERATIONS RESEARCH LETTERS LA English DT Article DE algorithms; center problems; approximation; networks ID P-CENTER PROBLEM AB We provide an approximation algorithm for selecting centers in a complete graph so as to minimize the maximum ratio of the distance between any two nodes via their respective centers to their true graph distance. Placing centers under such an objective function is important in designing efficient communication networks which rely on hubs for routing. (C) 2003 Elsevier B.V. All rights reserved. C1 Carnegie Mellon Univ, GSIA, Pittsburgh, PA 15213 USA. Purdue Univ, Krannert Sch Management, W Lafayette, IN 47907 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sinha, A (reprint author), Carnegie Mellon Univ, GSIA, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. EM jkonemann@acm.org; li14@mgmt.purdue.edu; odp@cs.cmu.edu; asinha@andrew.cmu.edu NR 9 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-6377 J9 OPER RES LETT JI Oper. Res. Lett. PD SEP PY 2004 VL 32 IS 5 BP 491 EP 495 DI 10.1016/j.orl.2003.11.011 PG 5 WC Operations Research & Management Science SC Operations Research & Management Science GA 822SV UT WOS:000221561400014 ER PT J AU Schaffers, KI AF Schaffers, KI TI Yb : S-FAP lasers SO OPTICAL MATERIALS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Lasers and Nonlinear Optical Materials CY JUL 20-23, 2003 CL Keystone, CO DE B3. solid state lasers; A2. Czochralski method; B1. oxides; A1. defects ID CRYSTALS; FLUORAPATITE AB It has recently been reported that several high power, diode-pumped laser systems have been developed based on crystals of Yb:S-FAP [Yb3+:Sr-5(PO4)(3)F]. The mercury laser, at Lawrence Livermore National Laboratory, is the most prominent system using Yb:S-FAP and is currently producing 23 J at 5 Hz in a 15 nsec pulse, based on partial activation of the system. In addition, a regenerative amplifier is being developed at Waseda University in Japan and has produced greater than 12 mJ with high beam quality at 50 Hz repetition rate. Q-Peak has demonstrated 16 mJ of maximum energy/output pulse in a multi-pass, diode side-pumped amplifier and ELSA in France is implementing Yb:S-FAP in a 985 nm pump for an EDFA, producing 250 mW. Growth of high optical quality crystals of Yb:S-FAP is a challenge due to multiple crystalline defects. However, at this time, a growth process has been developed to produce high quality 3.5 cm diameter Yb:S-FAP crystals and a process is under development for producing 6.5 cm diameter crystals. (C) 2004 Published by Elsevier B.V. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Schaffers, KI (reprint author), Lawrence Livermore Natl Lab, POB 808,7000 East Ave,L-482, Livermore, CA 94550 USA. EM schaffers1@llnl.gov NR 11 TC 9 Z9 10 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0925-3467 J9 OPT MATER JI Opt. Mater. PD SEP PY 2004 VL 26 IS 4 BP 391 EP 394 DI 10.1016/j.optmat.2004.02.003 PG 4 WC Materials Science, Multidisciplinary; Optics SC Materials Science; Optics GA 856LM UT WOS:000224046700011 ER PT J AU Chen, TC Johnson, M Poochinda, K Stoebe, TG Ricker, NL AF Chen, TC Johnson, M Poochinda, K Stoebe, TG Ricker, NL TI A systematic study on group III-nitride thin films with low temperature deposited via MOCVD SO OPTICAL MATERIALS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Lasers and Nonlinear Optical Materials CY JUL 20-23, 2003 CL Keystone, CO ID AIN BUFFER LAYER; GAN AB Wide bandgap, semiconductor materials provide superior electrical, optical, and thermal properties that classical semiconductors, Si and GaAs, are unable to achieve. However, most commercially available substrates have large lattice and thermal expansion mismatches to III-nitrides films. Thus a high quality buffer layer, grown at low temperatures, is essential in growing high quality III-nitride films. This research provides a throughout study on Ill-nitrides, such as AlN, GaN and AlGaN thin films, which were grown at low temperatures (400-600degreesC). Growth rate, stoichiometry and crystal structure of low temperature growth films will be reported by using several advanced post-growth analysis techniques. Temperature, pressure, and V/III molar ratio were also investigated to determine their effect on the film properties. From the study, a better understanding of the relationships between film properties and growth parameters will be achieved. Published by Elsevier B.V. C1 Univ Washington, Dept Chem Engn, Seattle, WA 98195 USA. Univ Washington, Dept Elect Engn, Paul Allen Ctr, Seattle, WA 98195 USA. Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Poochinda, K (reprint author), Univ Washington, Dept Chem Engn, Benson Hall,Box 351750, Seattle, WA 98195 USA. EM kunakom@u.washington.edu NR 5 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0925-3467 J9 OPT MATER JI Opt. Mater. PD SEP PY 2004 VL 26 IS 4 BP 417 EP 420 DI 10.1016/j.optman.2003.09.007 PG 4 WC Materials Science, Multidisciplinary; Optics SC Materials Science; Optics GA 856LM UT WOS:000224046700014 ER PT J AU Moses, EI AF Moses, EI TI The national ignition facility high-energy ultraviolet laser system SO OPTICAL MATERIALS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Lasers and Nonlinear Optical Materials CY JUL 20-23, 2003 CL Keystone, CO DE solid-state laser; inertial confinement fusion; high energy density physics; neodymium-doped glass laser ID FUSION AB The National Ignition Facility (NIF), currently under construction at the Lawrence Livermore National Laboratory, is a stadium-sized facility containing a 192-beam, 1.8 MJ, 500 TW, ultraviolet laser system together with a 10-m diameter target chamber with room for nearly 100 experimental diagnostics. When completed, NIF will be the world's largest and most energetic laser experimental system, providing an international center to study inertial confinement fusion and the physics of matter at extreme energy densities and pressures. NIF's 192 energetic laser beams will compress fusion targets to conditions required for thermonuclear burn, liberating more energy than required to initiate the fusion reactions. Other NIF experiments will allow the study of physical processes at temperatures approaching 10(8) K and 10(11) Bar, conditions that exist naturally only in the interior of stars, planets and in nuclear weapons. NIF is now entering the first phases of its laser commissioning program. The first four beams of the NIF laser system have generated 106 W of infrared light and over 10 kJ at the third harmonic (351 nm). NIF's target experimental systems are also being installed in preparation for experiments to begin in late 2003. This paper provides a detailed look the NIF laser systems, the significant laser and optical systems breakthroughs that were developed, the results of recent laser commissioning shots, and plans for commissioning diagnostics for experiments on NIF. (C) 2004 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Moses, EI (reprint author), Lawrence Livermore Natl Lab, POB 808 L-466, Livermore, CA 94551 USA. NR 12 TC 4 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0925-3467 J9 OPT MATER JI Opt. Mater. PD SEP PY 2004 VL 26 IS 4 BP 515 EP 521 DI 10.1016/j.optmat.2003.09.012 PG 7 WC Materials Science, Multidisciplinary; Optics SC Materials Science; Optics GA 856LM UT WOS:000224046700030 ER PT J AU Peleg, A AF Peleg, A TI Log-normal distribution of pulse amplitudes due to Raman cross talk in wavelength division multiplexing soliton transmission SO OPTICS LETTERS LA English DT Article ID SELF-FREQUENCY SHIFT; INTERCHANNEL COLLISIONS; OPTICAL-FIBERS; DISPERSION AB The effect of delayed Raman response on soliton collisions in wavelength division multiplexing (WDM) transmission systems is investigated. Taking into account the stochastic nature of pulse sequences in different frequency channels and the Raman-induced cross talk, it is shown that the soliton amplitude is a random variable with a log-normal distribution. Moreover, the Raman-induced self-frequency shift and cross-frequency shift are also random variables with log-normal-like distributions. These results imply that fluctuations in soliton amplitude and frequency induced by soliton collisions in the presence of delayed Raman response play an important role in massive WDM transmission. (C) 2004 Optical Society of America. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Peleg, A (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM avner@cnls.lanl.gov NR 12 TC 24 Z9 24 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD SEP 1 PY 2004 VL 29 IS 17 BP 1980 EP 1982 DI 10.1364/OL.29.001980 PG 3 WC Optics SC Optics GA 848QB UT WOS:000223481100006 PM 15455753 ER PT J AU Klasson, KT Taylor, PA Walker, JF Jones, SA Cummins, RL Richardson, SA AF Klasson, KT Taylor, PA Walker, JF Jones, SA Cummins, RL Richardson, SA TI Investigation of a centrifugal separator for in-well oil water separation SO PETROLEUM SCIENCE AND TECHNOLOGY LA English DT Article DE centrifugel separator; in-well separator; water-to-oil; hydrocyclones; gravity separation ID CONTACTOR; DISPERSION AB A liquid-liquid centrifuge has been tested for possible application as a downhole method for separating, crude oil from produced water. Centrifugal separators of various sizes (from 2- to 25-cm rotor diameter) have been built and operated over the past three decades at various US Department of Energy facilities. These units have several characteristics that make them attractive for downhole applications, including excellent phase separation, reliability in remote applications with >26,000 h of operation prior to maintenance,, and the ability to handle high volumetric throughput with a very low residence time. In these studies, water-to-oil feed ratios of 10: 1 to 1: 19 were tested with a light Gulf of Mexico crude oil, and the separator operated efficiently for the full range of feed ratios. Air was added to the oil stream in one test to model the effect of gas in the oil. Air additions up to 20% of the feed flow rate (the maximum tested) did not have any impact on the performance of the separator. The separator also effectively processed a very viscous North Sea heavy crude oil. The heavy crude was used to determine the effect of higher temperatures on the performance of the separator. Increasing the temperature of the oil and water feed stream improved overall performance and decreased the concentration of oil in the water discharge stream. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Taylor, PA (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM taylorpa@ornl.gov OI Klasson, K. Thomas/0000-0003-3358-3081 NR 15 TC 1 Z9 1 U1 1 U2 13 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 USA SN 1091-6466 J9 PETROL SCI TECHNOL JI Pet. Sci. Technol. PD SEP PY 2004 VL 22 IS 9-10 BP 1143 EP 1159 DI 10.1081/LFT-120034211 PG 17 WC Energy & Fuels; Engineering, Chemical; Engineering, Petroleum SC Energy & Fuels; Engineering GA 864HS UT WOS:000224625200002 ER PT J AU Volkov, VV Zhu, Y Malac, M AF Volkov, VV Zhu, Y Malac, M TI In-situ Lorentz microscopy and Lorentz phase imaging of artificially structured Co arrays SO PHILOSOPHICAL MAGAZINE LA English DT Article; Proceedings Paper CT International Symposium on In-Situ Electron Microscopy CY JAN 20-22, 2003 CL Nagoya, JAPAN SP Minist Educ, Culture, Sports, Sci & Technol Japanese Govt, Hitachi High Technol, FEI, JEOL, Daiko Fdn ID MAGNETIC FORCE MICROSCOPY; REVERSAL; ELEMENTS; RIPPLE; FILMS AB We combined in-situ magnetizing experiments with Lorentz Fresnel microscopy and Lorentz phase microscopy to analyse both qualitatively and quantitatively the in-situ magnetization process of artificially structured two dimensional arrays of Co islands. A newly developed Lorentz phase microscopy allows detailed mapping of in-plane magnetization on a nanometre scale following the hysteresis loop. For polycrystalline Co films, 20-40nm thick, we observed four major steps in the magnetization process: coherent spin rotation in adjacent nanodomains, nucleation of reverse domains, motion of the domain walls and additional spin rotation in magnetic domains and, finally, an expulsion of energetically non-favourable domains followed by the domain wall annihilation at the edges of Co islands. We offer a clear physical explanation of the magnetization ripple contrast. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Alberta, Edmonton, AB T6G 2J1, Canada. RP Volkov, VV (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM volkov@bnl.gov RI Volkov, Vyacheslav/D-9786-2016 NR 19 TC 2 Z9 2 U1 1 U2 7 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6443 J9 PHILOS MAG JI Philos. Mag. PD SEP 1 PY 2004 VL 84 IS 25-26 BP 2607 EP 2617 DI 10.1080/14786430410001671386 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 853SU UT WOS:000223850000003 ER PT J AU Storaska, GA Moore, KT Howe, JM AF Storaska, GA Moore, KT Howe, JM TI Correlation between the structural and compositional changes at the solid-liquid interface in submicron Al-Si alloy particles SO PHILOSOPHICAL MAGAZINE LA English DT Article; Proceedings Paper CT International Symposium on In-Situ Electron Microscopy CY JAN 20-22, 2003 CL Nagoya, JAPAN SP Minist Educ, Culture, Sports, Sci & Technol Japanese Govt, Hitachi High Technol, FEI, JEOL, Daiko Fdn ID TRANSMISSION ELECTRON-MICROSCOPY; HIGH-RESOLUTION; MELT INTERFACE; CRYSTAL; SEGREGATION; SIMULATION; ENERGY; SURFACES; MATRIX; MODEL AB Diffraction contrast and energy-filtered transmission electron microscopy (TEM) were used to investigate the structure and composition of the solid-liquid interface in Al-11.6 at.% Si alloy particles of 80-400 nm diameter during in-situ heating in the TEM. Comparison between the bright-field and energy-filtered TEM images indicates that the change in structure at the solid-liquid interface as defined by diffraction contrast is accompanied by a corresponding change in composition across the interface as determined from intensity profiles of Al elemental maps and jump-ratio images. Thus, the structural and compositional changes at the solid-liquid alloy interface appear to occur simultaneously over a distance of no more than about 2 nm. C1 Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. Northrop Grumman Corp, Adv Mat & Semicond Device Technol Ctr, Baltimore, MD 21203 USA. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Storaska, GA (reprint author), Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. EM jh9s@virginia.edu NR 31 TC 7 Z9 7 U1 0 U2 5 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6443 J9 PHILOS MAG JI Philos. Mag. PD SEP 1 PY 2004 VL 84 IS 25-26 BP 2619 EP 2634 DI 10.1080/14786430410001671395 PG 16 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 853SU UT WOS:000223850000004 ER PT J AU Dahmen, U Hagege, S Faudot, F Radetic, T Johnson, E AF Dahmen, U Hagege, S Faudot, F Radetic, T Johnson, E TI Observations of interface premelting at grain-boundary precipitates of Pb in Al SO PHILOSOPHICAL MAGAZINE LA English DT Article; Proceedings Paper CT International Symposium on In-Situ Electron Microscopy CY JAN 20-22, 2003 CL Nagoya, JAPAN SP Minist Educ, Culture, Sports, Sci & Technol Japanese Govt, Hitachi High Technol, FEI, JEOL, Daiko Fdn ID NANOSIZED LEAD INCLUSIONS; EQUILIBRIUM SHAPE; MELTING TEMPERATURE; SOLID AL; PARTICLES; MATRICES; ALUMINUM; DEPENDENCE; SOLIDIFICATION; NANOCRYSTALS AB This work reports direct observations showing the effect of size and interface structure on premelting behaviour of nanoscale inclusions. Using ill-situ transmission electron microscopy it was possible to observe premelting of individual Pb inclusions in Al, each bounded by two distinctly different topotaxial interfaces. Such particles were generated by precipitating single-crystal Pb inclusions a few tens of nanometres in size at grain boundaries in Al. At equilibrium these particles adopt compound shapes, made from two segments whose shape and interface structure is characteristic of their misorientation With the matrix crystal. Only one of these interfaces premelts. In close agreement with a simple model, the width of the liquid layer depends reversibly on undercooling and interface curvature, and hence on particle size. The observed behaviour confirms previous reports on interface-dependent melting. By observing the selective melting of different interfaces for the first time on individual particles, it was possible to rule out experimental uncertainties and to show unambiguously that inclusion melting depends strongly on interface structure. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. CNRS, Ctr Etud Chim Met, F-94407 Vitry Sur Seine, France. Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. RP Dahmen, U (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM Udahmen@LBL.gov NR 38 TC 29 Z9 29 U1 1 U2 4 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6443 J9 PHILOS MAG JI Philos. Mag. PD SEP 1 PY 2004 VL 84 IS 25-26 BP 2651 EP 2662 DI 10.1080/14786430410001671403 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 853SU UT WOS:000223850000006 ER PT J AU Johnson, E Levinsen, MT Steenstrup, S Prokofjev, S Zhilin, V Dahmen, U Radetic, T AF Johnson, E Levinsen, MT Steenstrup, S Prokofjev, S Zhilin, V Dahmen, U Radetic, T TI One-dimensional random walk of nanosized liquid Pb inclusions on dislocations in Al SO PHILOSOPHICAL MAGAZINE LA English DT Article; Proceedings Paper CT International Symposium on In-Situ Electron Microscopy CY JAN 20-22, 2003 CL Nagoya, JAPAN SP Minist Educ, Culture, Sports, Sci & Technol Japanese Govt, Hitachi High Technol, FEI, JEOL, Daiko Fdn ID BROWNIAN-MOTION; VACANCY ISLANDS; GAS BUBBLES; DIFFUSION; ALUMINUM AB Migration of nanosized liquid Pb inclusions attached to dislocations in Al has been observed during in-situ transmission electron microscopy heating experiments and monitored by real-time video recordings. The movements of the inclusions can be separated into two independent components parallel to and perpendicular to the dislocations respectively. Movements parallel to the dislocation lines display properties of partially confined one-dimensional random walks where smaller inclusions can be seen to move over distances that are many times their own sizes. In contrast, the trajectories perpendicular to the dislocation lines are within narrowly confined spaces. Frame-by-frame analysis of digitized video sequences recorded at different temperatures for the same inclusion attached to a nearly horizontal dislocation illustrates the two types of movement. The step lengths parallel to the dislocation increase rapidly with increasing temperature while the step lengths in the transverse movement only display a weak temperature dependence. A detailed statistical analysis of the inclusion trajectories documents that both patterns of movement are random. The activation enthalpy of the one-dimensional movement parallel to the dislocation was found to be 2.72 +/- 0.10 eV at lower temperatures and 1.44 +/- 0.07 eV at higher temperatures with a transition temperature around 650-660 K. C1 Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark. Riso Natl Lab, Dept Mat Res, DK-4000 Roskilde, Denmark. Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia. Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. RP Johnson, E (reprint author), Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark. EM johnson@fys.ku.dk NR 22 TC 5 Z9 5 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6443 J9 PHILOS MAG JI Philos. Mag. PD SEP 1 PY 2004 VL 84 IS 25-26 BP 2663 EP 2673 DI 10.1080/14786430410001671412 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 853SU UT WOS:000223850000007 ER PT J AU Patriarca, M Chakraborti, A Kaski, K AF Patriarca, M Chakraborti, A Kaski, K TI Gibbs versus non-Gibbs distributions in money dynamics SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS LA English DT Article; Proceedings Paper CT 2nd Sardinian International Conference on News and Expectations in Thermostatistics CY SEP 21-28, 2003 CL Villasimius, ITALY DE econophysics; money dynamics; gamma distribution; Gibbs distribution ID STATISTICAL-MECHANICS; SAVING PROPENSITY; LAW; INCOME; WEALTH; MODEL AB We review a simple model of closed economy, where the economic agents make money transactions and a saving criterion is present. We observe the Gibbs distribution for zero saving propensity, and non-Gibbs distributions otherwise. While the exact solution in the case of zero saving propensity is already known to be given by the Gibbs distribution, here we provide the explicit analytical form of the equilibrium distribution for the general case of nonzero saving propensity. We verify it through comparison with numerical data and show that it can be cast in the form of a gamma-distribution. (C) 2004 Elsevier B.V. All rights reserved. C1 Helsinki Univ Technol, Lab Computat Engn, Complex Syst Grp, Espoo 02015, Finland. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Patriarca, M (reprint author), Helsinki Univ Technol, Lab Computat Engn, Complex Syst Grp, POB 9203, Espoo 02015, Finland. EM marco@lce.hut.fi; anirban@bnl.gov; kimmo.kaski@hut.fi RI Chakraborti, Anirban/A-4565-2010; Kaski, Kimmo/G-8067-2012; Patriarca, Marco/D-8759-2013 OI Chakraborti, Anirban/0000-0002-6235-0204; Patriarca, Marco/0000-0001-6743-2914 NR 12 TC 24 Z9 24 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD SEP 1 PY 2004 VL 340 IS 1-3 BP 334 EP 339 DI 10.1016/j.physa.2004.04.024 PG 6 WC Physics, Multidisciplinary SC Physics GA 841IZ UT WOS:000222924800042 ER PT J AU Andrews, SS Bray, D AF Andrews, SS Bray, D TI Stochastic simulation of chemical reactions with spatial resolution and single molecule detail SO PHYSICAL BIOLOGY LA English DT Article ID BROWNIAN DYNAMICS; CELL BIOLOGY; DIFFUSION; KINETICS; NOISE AB Methods are presented for simulating chemical reaction networks with a spatial resolution that is accurate to nearly the size scale of individual molecules. Using an intuitive picture of chemical reaction systems, each molecule is treated as a point-like particle that diffuses freely in three-dimensional space. When a pair of reactive molecules collide, such as an enzyme and its substrate, a reaction occurs and the simulated reactants are replaced by products. Achieving accurate bimolecular reaction kinetics is surprisingly difficult, requiring a careful consideration of reaction processes that are often overlooked. This includes whether the rate of a reaction is at steady-state and the probability that multiple reaction products collide with each other to yield a back reaction. Inputs to the simulation are experimental reaction rates, diffusion coefficients and the simulation time step. From these are calculated the simulation parameters, including the 'binding radius' and the 'unbinding radius', where the former defines the separation for a molecular collision and the latter is the initial separation between a pair of reaction products. Analytic solutions are presented for some simulation parameters while others are calculated using look-up tables. Capabilities of these methods are demonstrated with simulations of a simple bimolecular reaction and the Lotka-Volterra system. C1 Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England. RP Andrews, SS (reprint author), Lawrence Berkeley Natl Lab, Phys Biosci Div, Calvin Lab, Bldg 3-130,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM ssandrews@lbl.gov; db10009@cam.ac.uk FU NIGMS NIH HHS [GM64713] NR 45 TC 246 Z9 248 U1 2 U2 32 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1478-3967 J9 PHYS BIOL JI Phys. Biol. PD SEP PY 2004 VL 1 IS 3 BP 137 EP 151 AR PII S1478-3967(04)83249-2 DI 10.1088/1478-3967/1/3/001 PG 15 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 968BM UT WOS:000232136300001 PM 16204833 ER PT J AU Kiskowski, MA Jiang, Y Alber, MS AF Kiskowski, MA Jiang, Y Alber, MS TI Role of streams in myxobacteria aggregate formation SO PHYSICAL BIOLOGY LA English DT Article ID FRUITING BODY MORPHOGENESIS; MYXOCOCCUS-XANTHUS MYXOBACTERALES; SURFACE-ASSOCIATED MORPHOGEN; C-FACTOR; PATTERN-FORMATION; SELF-ORGANIZATION; SIGNALING PROTEIN; GLIDING MOTILITY; TRAVELING WAVES; CELL-DENSITY AB Cell contact, movement and directionality are important factors in biological development ( morphogenesis), and myxobacteria are a model system for studying cell-cell interaction and cell organization preceding differentiation. When starved, thousands of myxobacteria cells align, stream and form aggregates which later develop into round, non-motile spores. Canonically, cell aggregation has been attributed to attractive chemotaxis, a long range interaction, but there is growing evidence that myxobacteria organization depends on contact-mediated cell-cell communication. We present a discrete stochastic model based on contact-mediated signaling that suggests an explanation for the initialization of early aggregates, aggregation dynamics and final aggregate distribution. Our model qualitatively reproduces the unique structures of myxobacteria aggregates and detailed stages which occur during myxobacteria aggregation: first, aggregates initialize in random positions and cells join aggregates by random walk; second, cells redistribute by moving within transient streams connecting aggregates. Streams play a critical role in final aggregate size distribution by redistributing cells among fewer, larger aggregates. The mechanism by which streams redistribute cells depends on aggregate sizes and is enhanced by noise. Our model predicts that with increased internal noise, more streams would form and streams would last longer. Simulation results suggest a series of new experiments. C1 Univ Notre Dame, Dept Math, Notre Dame, IN 46556 USA. Univ Notre Dame, Ctr Study Biocomplex, Notre Dame, IN 46556 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Kiskowski, MA (reprint author), Vanderbilt Univ, Dept Math, Stevenson Ctr, Biomath Study Grp, 221 Kirkland Hall, Nashville, TN 37240 USA. EM malber@nd.edu NR 45 TC 8 Z9 8 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1478-3967 J9 PHYS BIOL JI Phys. Biol. PD SEP PY 2004 VL 1 IS 3 BP 173 EP 183 AR PII S1478-3967(04)82608-1 DI 10.1088/1478-3967/1/3/005 PG 11 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 968BM UT WOS:000232136300005 PM 16204837 ER PT J AU Crocce, M Dalvit, DAR Lombardo, FC Mazzitelli, FD AF Crocce, M Dalvit, DAR Lombardo, FC Mazzitelli, FD TI Model for resonant photon creation in a cavity with time-dependent conductivity SO PHYSICAL REVIEW A LA English DT Article ID CASIMIR FORCE; PARAMETRIC-EXCITATION; OSCILLATING BOUNDARY; VIBRATING CAVITY; MU-M; RADIATION; GENERATION; VACUUM; MIRROR; PULSES AB In an electromagnetic cavity, photons can be created from the vacuum state by changing the cavity's properties with time. Using a simple model based on a massless scalar field, we analyze resonant photon creation induced by the time-dependent conductivity of a thin semiconductor film contained in the cavity. This time dependence may be achieved by irradiating periodically the film with short laser pulses. This setup offers several experimental advantages over the case of moving mirrors. C1 NYU, Dept Phys, New York, NY 10003 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis Juan Jose Giambiagi, RA-1428 Buenos Aires, DF, Argentina. RP Crocce, M (reprint author), NYU, Dept Phys, 4 Washington Pl, New York, NY 10003 USA. NR 35 TC 44 Z9 44 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2004 VL 70 IS 3 AR 033811 DI 10.1103/PhysRevA.70.033811 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 864GW UT WOS:000224623000142 ER PT J AU Hu, SX Collins, LA AF Hu, SX Collins, LA TI Phase control of the inverse above-threshold-ionization process with few-cycle pulses SO PHYSICAL REVIEW A LA English DT Article ID STIMULATED RADIATIVE RECOMBINATION; ELECTRON-ION RECOMBINATION; ULTRASHORT LASER-PULSES; FIELDS; EMISSION; ATOMS AB Intense laser-induced recombination of electrons and ions has been investigated with ultrashort few-cycle pulses. Our numerical simulations demonstrate that the absolute phase of a few-cycle laser field with respect to its pulse envelope plays a crucial role in the inverse above-threshold-ionization processes. By controlling the phase of a few-cycle pulse we can maximize the multiphoton recombination probability for electrons having certain energies. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Hu, SX (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM suxing@lanl.gov; lac@lanl.gov RI Hu, Suxing/A-1265-2007 OI Hu, Suxing/0000-0003-2465-3818 NR 25 TC 11 Z9 11 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 EI 1094-1622 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2004 VL 70 IS 3 AR 035401 DI 10.1103/PhysRevA.70.035401 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 864GW UT WOS:000224623000157 ER PT J AU Mokler, PH Schaffer, HW Dunford, RW AF Mokler, PH Schaffer, HW Dunford, RW TI Two-photon decay of K-shell vacancies in silver atoms SO PHYSICAL REVIEW A LA English DT Article ID CONSISTENT-FIELD CALCULATION; HELIUM-LIKE IONS; INNER SHELLS; XENON ATOMS; TRANSITIONS; EMISSION; HYDROGENLIKE; RATES; XE AB The spectral distributions for the two-photon decay modes of singly K-shell ionized silver atoms are determined by x-ray-x-ray coincidence measurements. Ag K-shell vacancies were induced by nuclear electron capture decay of radioactive cadmium isotopes Cd-109 and two-photon coincidences were taken back to back (180degrees) and at a 90degrees opening angle for the emission. Each of the two-photon transitions from the 2s, 3s, and 3d states exhibits unique angular and spectral distributions. The measurements agree nicely with relativistic self-consistent field calculations of Tong Our results also confirm and extend the earlier experimental data of Ilakovac and co-workers with improved accuracy. C1 GSI Darmstadt, Darmstadt, Germany. Univ Giessen, Giessen, Germany. Argonne Natl Lab, Argonne, IL 60439 USA. IBM Germany, D-60528 Frankfurt, Germany. RP Mokler, PH (reprint author), GSI Darmstadt, Darmstadt, Germany. EM P.Mokler@GSI.de NR 23 TC 8 Z9 8 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2004 VL 70 IS 3 AR 032504 DI 10.1103/PhysRevA.70.032504 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 864GW UT WOS:000224623000062 ER PT J AU Reinhold, CO Zhao, W Lancaster, JC Dunning, FB Persson, E Arbo, DG Yoshida, S Burgdorfer, J AF Reinhold, CO Zhao, W Lancaster, JC Dunning, FB Persson, E Arbo, DG Yoshida, S Burgdorfer, J TI Response of highly polarized Rydberg states to trains of half-cycle pulses SO PHYSICAL REVIEW A LA English DT Article ID EXCITED HYDROGEN-ATOMS; DELTA-KICKED ROTOR; MICROWAVE IONIZATION; QUANTUM; NOISE; LOCALIZATION; REALIZATION; RESONANCES; BEHAVIOR; DYNAMICS AB The response of very-high-n strongly polarized potassium Rydberg atoms to a sequence of impulsive perturbations provided by a train of short unidirectional electric pulses is investigated. Each pulse, termed a half-cycle pulse (HCP), has a duration T-p and r(0)=b and 3.8 GPa for the energy of a core with zero polarity and Peierls stress for simple shear in ((1) over bar 10)<111>, respectively, to be compared to 0.300 eV/Angstrom and 2.4 GPa obtained using an empirical many-body potential for a polarized core. Our results suggest that the large Peierls stress of screw dislocation in Mo is due to the transition from nonplanar to planar core, rather than a direct effect of the equilibrium core polarity. C1 Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys, Ames, IA 50011 USA. MIT, Dept Nucl Engn, Cambridge, MA 02139 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Li, J (reprint author), Ohio State Univ, Dept Mat Sci & Engn, 116 W 19th Ave, Columbus, OH 43210 USA. EM syip@mit.edu RI Li, Ju/A-2993-2008; OI Li, Ju/0000-0002-7841-8058; Cai, Wei/0000-0001-5919-8734 NR 39 TC 57 Z9 58 U1 0 U2 24 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 10 AR 104113 DI 10.1103/PhysRevB.70.104113 PG 8 WC Physics, Condensed Matter SC Physics GA 858RL UT WOS:000224209300032 ER PT J AU Liu, HZ Mao, HK Somayazulu, M Ding, Y Meng, Y Hausermann, D AF Liu, HZ Mao, HK Somayazulu, M Ding, Y Meng, Y Hausermann, D TI B1-to-B2 phase transition of transition-metal monoxide CdO under strong compression SO PHYSICAL REVIEW B LA English DT Article ID HIGH-PRESSURE; ELECTRONIC-STRUCTURE; MNO; APPROXIMATION; MAGNETISM; CRYSTAL; DENSITY; FEO; ZNO; GPA AB This paper reports the experimental research on the compressibility and phase transition of CdO up to 176 GPa at room temperature using high-resolution angular-dispersive x-ray diffraction from synchrotron source combined with the diamond anvil cell technique. The phase transition from NaCl (B1)- to CsCl (B2)-type structure for CdO was observed at pressure about 90.6 GPa, which is uniquely observed in the transition-metal oxide family for the pressure-induced direct B1-B2 transition and in good agreement with the theoretical prediction. The bulk modulus of the B1 and B2 phases of CdO at zero pressure was estimated as 147 and 169 GPa, respectively. The 3d and 4d transition-metal monoxides ZnO and CdO were both predicted to undergo a B1-to-B2-type structural transformation under high pressure based on first-principles total energy calculations; the difference in the bulk moduli between the results of this experiment and simulations, and the possibility of a similar B1-to-B2 phase transition in ZnO are discussed. C1 Argonne Natl Lab, Adv Photon Source, HPCAT Carnegie Inst Washington, Argonne, IL 60439 USA. RP Liu, HZ (reprint author), Argonne Natl Lab, Adv Photon Source, HPCAT Carnegie Inst Washington, Bldg 434E, Argonne, IL 60439 USA. EM hliu@hpcat.aps.anl.gov RI Liu, Haozhe/E-6169-2011; Ding, Yang/K-1995-2014 OI Ding, Yang/0000-0002-8845-4618 NR 30 TC 48 Z9 49 U1 1 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 094114 DI 10.1103/PhysRevB.70.094114 PG 5 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200038 ER PT J AU Lu, CX Zhang, JD Jin, R Qu, HW He, J Mandrus, D Tsuei, KD Tzeng, CT Lin, LC Plummer, EW AF Lu, CX Zhang, JD Jin, R Qu, HW He, J Mandrus, D Tsuei, KD Tzeng, CT Lin, LC Plummer, EW TI Imperfection-driven phase transition at 120 K in Cd2Re2O7 SO PHYSICAL REVIEW B LA English DT Article ID PYROCHLORE OXIDE CD2RE2O7; SPIN ICE AB The normal-state electronic structure of the superconductor Cd2Re2O7 is studied using both scanning tunneling and photoelectron spectroscopy across the phase transitions at T-S1=200 K and T-S2=120 K. While bulk properties display large anomalies at T-S1 but rather subtle and sample-dependent changes at T-S2, the electronic density of states near the Fermi energy measured using both surface-sensitive techniques shows no change at T-S1 but a substantial increase below T-S2-a complete reversal as the signature for the transitions. We argue that crystal imperfections, which are considerably enhanced at the surface, result in the transition at T-S2. C1 Florida Int Univ, Dept Phys, Miami, FL 33199 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Synchrotron Radiat Res Ctr, Hsinchu 30077, Taiwan. Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan. Lan Yang Inst Technol, Ilan, Taiwan. RP Zhang, JD (reprint author), Florida Int Univ, Dept Phys, Miami, FL 33199 USA. EM zhangj@fiu.edu RI Mandrus, David/H-3090-2014 NR 20 TC 8 Z9 8 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 092506 DI 10.1103/PhysRevB.70.092506 PG 4 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200022 ER PT J AU Lu, XH Grobis, M Khoo, KH Louie, SG Crommie, MF AF Lu, XH Grobis, M Khoo, KH Louie, SG Crommie, MF TI Charge transfer and screening in individual C-60 molecules on metal substrates: A scanning tunneling spectroscopy and theoretical study SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-ABSORPTION; ELECTRONIC-STRUCTURES; DOPED C-60; INVERSE-PHOTOEMISSION; 2-DIMENSIONAL C-60; CU(111) SURFACES; WORK FUNCTION; THIN-FILMS; MICROSCOPY; AU(111) AB We have used scanning tunneling microscopy and spectroscopy to study the electronic structure of individual C-60 molecules adsorbed onto the Au(111) and Ag(100) surfaces. C-60 molecules on Au(111) show an increase in the HOMO-LUMO gap of 0.6 eV compared to C-60 on Ag(100). Splitting of the C-60 LUMO manifold is suppressed for C-60 on Au(111), in contrast to the strong splitting observed for C-60 on Ag(100). Our data implies a 0.6 eV increase in intramolecular Coulomb energy for C-60 on Au(111) as compared to C-60 on Ag(100). Topographs and energy-resolved spectral maps, however, show nearly identical features and indicate a similar influence of the two substrates on molecular-orbital geometry. C-60-substrate bonding and charge transfer is further investigated by calculating C-60 charge redistribution using ab initio pseudopotential density-functional theory methods. These calculations indicate that a negligible amount of charge is transferred from Au(111) to adsorbed C-60, while about 0.2 electron is transferred to C-60 resting on Ag(100), although the precise amount depends on the definition used. This charge transfer likely changes the electronic screening properties of C-60, providing an explanation for observed spectroscopic differences on these two substrates. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Lu, XH (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Lu, Xinghua/F-2655-2010; Khoo, Khoong Hong/G-3983-2012 OI Khoo, Khoong Hong/0000-0002-4628-1202 NR 84 TC 191 Z9 192 U1 8 U2 76 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 11 AR 115418 DI 10.1103/PhysRevB.70.115418 PG 8 WC Physics, Condensed Matter SC Physics GA 858RN UT WOS:000224209500102 ER PT J AU Macridin, A Jarrell, M Maier, T AF Macridin, A Jarrell, M Maier, T TI Absence of the d-density-wave state from the two-dimensional Hubbard model SO PHYSICAL REVIEW B LA English DT Article ID T-J-MODEL; CORRELATED ELECTRON-SYSTEMS; DYNAMICAL MEAN-FIELD; VALENCE BOND STATE; PHASE-DIAGRAM; SUPERCONDUCTIVITY; LIMIT AB Using the dynamical cluster approximation (DCA) we calculate the alternating circulating-current susceptibility and investigate the transition to the d-density wave (DDW) order in the two-dimensional Hubbard model. The 2x2 cluster used in the DCA calculation is the smallest that can capture d-wave order; therefore, due to the mean-field character of our calculation, we expect to overestimate the DDW transition temperatures. Despite this, we found no transition to the DDW state. On the other hand, DCA captures well the pseudogap features, showing that the pseudogap is not caused by the DDW order. In the pseudogap region the DDW susceptibility is enhanced, as predicted by the slave boson SU(2) theory, but it still is much smaller than the d-wave pairing susceptibility. C1 Univ Cincinnati, Cincinnati, OH 45221 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Macridin, A (reprint author), Univ Cincinnati, Cincinnati, OH 45221 USA. RI Maier, Thomas/F-6759-2012 OI Maier, Thomas/0000-0002-1424-9996 NR 26 TC 18 Z9 18 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 11 AR 113105 DI 10.1103/PhysRevB.70.113105 PG 4 WC Physics, Condensed Matter SC Physics GA 858RN UT WOS:000224209500005 ER PT J AU Mang, PK Larochelle, S Mehta, A Vajk, OP Erickson, AS Lu, L Buyers, WJL Marshall, AF Prokes, K Greven, M AF Mang, PK Larochelle, S Mehta, A Vajk, OP Erickson, AS Lu, L Buyers, WJL Marshall, AF Prokes, K Greven, M TI Phase decomposition and chemical inhomogeneity in Nd2-xCexCuO4 +/-delta SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTOR; CRYSTAL NEUTRON-DIFFRACTION; CONDENSED-MATTER PHYSICS; T-C SUPERCONDUCTOR; SINGLE-CRYSTAL; ANTIFERROMAGNETIC ORDER; SPURIOUS MAGNETISM; CHEMISTRY; SYSTEMS; OXIDES AB Extensive x-ray and neutron scattering experiments and additional transmission electron microscopy results reveal the partial decomposition of Nd2-xCexCuO4+/-delta (NCCO) in a low-oxygen-fugacity environment such as that typically realized during the annealing process required to create a superconducting state. Unlike a typical situation in which a disordered secondary phase results in diffuse powder scattering, a serendipitous match between the in-plane lattice constant of NCCO and the lattice constant of one of the decomposition products, (Nd,Ce)(2)O-3, causes the secondary phase to form an oriented, quasi-two-dimensional epitaxial structure. Consequently, diffraction peaks from the secondary phase appear at rational positions (H,K,0) in the reciprocal space of NCCO. Additionally, because of neodymium paramagnetism, the application of a magnetic field increases the low-temperature intensity observed at these positions via neutron scattering. Such effects may mimic the formation of a structural superlattice or the strengthening of antiferromagnetic order of NCCO, but the intrinsic mechanism may be identified through careful and systematic experimentation. For typical reduction conditions, the (Nd,Ce)(2)O-3 volume fraction is approximately 1%, and the secondary-phase layers exhibit long-range order parallel to the NCCO CuO2 sheets and have a typical thickness of approximately 100 A. The presence of the secondary phase should also be taken into account in the analysis of other experiments on NCCO, such as transport measurements. C1 Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. CNR, Neutron Program Mat Res, Chalk River Labs, Chalk River, ON K0J 1J0, Canada. Stanford Univ, TH Geballe Lab Adv Mat, Stanford, CA 94305 USA. Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany. RP Mang, PK (reprint author), Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. NR 44 TC 57 Z9 59 U1 0 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 094507 DI 10.1103/PhysRevB.70.094507 PG 15 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200084 ER PT J AU Mathioudakis, C Kopidakis, G Kelires, PC Wang, CZ Ho, KM AF Mathioudakis, C Kopidakis, G Kelires, PC Wang, CZ Ho, KM TI Physical trends in amorphous carbon: A tight-binding molecular-dynamics study SO PHYSICAL REVIEW B LA English DT Article ID AB-INITIO SIMULATIONS; DIAMOND-LIKE-CARBON; SHORT-RANGE ORDER; ELECTRONIC-PROPERTIES; ELASTIC PROPERTIES; STRUCTURAL-PROPERTIES; INTRINSIC STRESS; RANDOM NETWORKS; BULK MODULI; FILMS AB Tight-binding molecular dynamics simulations reveal interesting physical trends in amorphous carbon networks. The variation of sp(3) fraction, or mean coordination, is found to be linear over the whole possible range of densities. The density at the floppy transition is similar to0.5 g cm(-3), while the density of "amorphous diamond" is similar to3.3 g cm(-3). The bulk modulus vanishes at the floppy transition, having a critical coordination near 2.4, and its variation with the mean coordination has a scaling exponent of 1.5, confirming the constraint-counting model of Phillips and Thorpe. A hypothetical fully tetrahedral network has a bulk modulus of 360 GPa, about 15% lower than diamond's. The bulk modulus is also found to vary with the average bond length (d) over bar as ((d) over bar)(3.5). The homopolar gap of "amorphous diamond" is similar to11.5 eV, compared to similar to14 eV for diamond. C1 Univ Crete, Dept Phys, Iraklion 71003, Crete, Greece. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Phys, Ames, IA 50011 USA. RP Kelires, PC (reprint author), Univ Crete, Dept Phys, POB 2208, Iraklion 71003, Crete, Greece. EM kelires@physics.uoc.gr NR 56 TC 37 Z9 37 U1 1 U2 10 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 12 AR 125202 DI 10.1103/PhysRevB.70.125202 PG 10 WC Physics, Condensed Matter SC Physics GA 858RO UT WOS:000224209600032 ER PT J AU Nachimuthu, P Thevuthasan, S Engelhard, MH Weber, WJ Shuh, DK Hamdan, NM Mun, BS Adams, EM McCready, DE Shutthanandan, V Lindle, DW Balakrishnan, G Paul, DM Gullikson, EM Perera, RCC Lian, J Wang, LM Ewing, RC AF Nachimuthu, P Thevuthasan, S Engelhard, MH Weber, WJ Shuh, DK Hamdan, NM Mun, BS Adams, EM McCready, DE Shutthanandan, V Lindle, DW Balakrishnan, G Paul, DM Gullikson, EM Perera, RCC Lian, J Wang, LM Ewing, RC TI Probing cation antisite disorder in Gd2Ti2O7 pyrochlore by site-specific near-edge x-ray-absorption fine structure and x-ray photoelectron spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID IMMOBILIZATION; A(2)B(2)O(7); TRANSITION; PLUTONIUM; OXYGEN AB Disorder in Gd2Ti2O7 is investigated by near-edge x-ray-absorption fine structure (NEXAFS) and x-ray photoelectron spectroscopy (XPS). NEXAFS shows Ti4+ ions occupy octahedral sites with a tetragonal distortion induced by vacant oxygen sites. O 1s XPS spectra obtained with a charge neutralization system from Gd2Ti2O7(100) and the Gd2Ti2O7 pyrochlore used by Chen [Phys. Rev. Lett. 88, 105901 (2002)], both yielded a single peak, unlike the previous result on the latter that found two peaks. The current results give no evidence for an anisotropic distribution of Ti and O. The extra features reported in the aforementioned communication resulted from charging effects and incomplete surface cleaning. Thus, a result confirming the direct observation of simultaneous cation-anion antisite disordering and lending credence to the split vacancy model has been clarified. C1 Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA. RP Nachimuthu, P (reprint author), Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. EM PNachimuthu@lbl.gov RI Engelhard, Mark/F-1317-2010; Lian, Jie/A-7839-2010; Weber, William/A-4177-2008; Mun, Bongjin /G-1701-2013; Balakrishnan, Geetha/P-5977-2016; OI Weber, William/0000-0002-9017-7365; Balakrishnan, Geetha/0000-0002-5890-1149; Engelhard, Mark/0000-0002-5543-0812 NR 19 TC 23 Z9 23 U1 1 U2 15 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 10 AR 100101 DI 10.1103/PhysRevB.70.100101 PG 4 WC Physics, Condensed Matter SC Physics GA 858RL UT WOS:000224209300001 ER PT J AU Nickel, B Barabash, R Ruiz, R Koch, N Kahn, A Feldman, LC Haglund, RF Scoles, G AF Nickel, B Barabash, R Ruiz, R Koch, N Kahn, A Feldman, LC Haglund, RF Scoles, G TI Dislocation arrangements in pentacene thin films SO PHYSICAL REVIEW B LA English DT Article ID FIELD-EFFECT TRANSISTORS; SIZE DISTRIBUTION; MISFIT DISLOCATIONS; GRAIN-SIZE; CRYSTAL; TETRACENE; MOBILITY; GROWTH; ELECTRONICS; DIFFRACTION AB We have studied the growth of pentacene films (2-8 monolayers) on modified Si-wafer surfaces by means of synchrotron x-ray diffraction. The diffraction data reveal a nonthermal damping of the (coherent) Bragg reflection intensities according to an exponential dependence on the 3/2 power of the momentum transfer. The simultaneous presence of strong diffuse scattering centered around the Bragg positions indicates the presence of local defects. A quantitative analysis of the Bragg and diffuse scattering allows us to identify screw and edge dislocations as the main defects on the molecular scale. We quantify dislocation densities as a function of substrate termination. C1 Princeton Univ, Dept Chem, Princeton, NJ 08544 USA. Princeton Mat Inst, Princeton, NJ 08544 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA. RP Nickel, B (reprint author), Univ Munich, D-80539 Munich, Germany. EM bert.nickel@physik.uni-muenchen.de; barabashr@ornl.gov RI Nickel, Bert/A-2095-2009; Koch, Norbert/J-4057-2012; OI Nickel, Bert/0000-0002-0254-8841; Koch, Norbert/0000-0002-6042-6447; Ruiz, Ricardo/0000-0002-1698-4281 NR 49 TC 60 Z9 60 U1 3 U2 31 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 12 AR 125401 DI 10.1103/PhysRevB.70.125401 PG 7 WC Physics, Condensed Matter SC Physics GA 858RO UT WOS:000224209600064 ER PT J AU Park, S Fitzsimmons, MR Dong, XY Schultz, BD Palmstrom, CJ AF Park, S Fitzsimmons, MR Dong, XY Schultz, BD Palmstrom, CJ TI Magnetic degradation of an FeCo/GaAs interface SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-BEAM EPITAXY; X-RAY REFLECTION; NEUTRON-SCATTERING; THIN-FILMS; FE FILMS; GIANT MAGNETORESISTANCE; FERROMAGNETIC JUNCTIONS; ROUGH SURFACES; HETEROSTRUCTURES; MULTILAYERS AB Polarized neutron reflectometry was used to measure the magnetization depth profile of an epitaxial FeCo single crystal film grown on GaAs(100) (2x4)/c(2x8)beta2 at 95degreesC-a prototypical example of a ferromagnetic/semiconductor heterostructure. From a quantitative analysis of the neutron scattering data, we find the magnetic thickness of the FeCo layer to be 6 A thinner than its chemical thickness. Further, we show the chemical and magnetic structures of the FeCo film are incommensurate at the FeCo/GaAs interface, suggesting that the FeCo/GaAs interface region does not possess the magnetization of the FeCo film. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA. RP Park, S (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Lujan Center, LANL/G-4896-2012 NR 54 TC 9 Z9 9 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 10 AR 104406 DI 10.1103/PhysRevB.70.104406 PG 10 WC Physics, Condensed Matter SC Physics GA 858RL UT WOS:000224209300043 ER PT J AU Rhee, JY Harmon, BN AF Rhee, JY Harmon, BN TI Metamagnetic behavior of Fe3M (M = Al and Si) alloys at high pressure SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC-PROPERTIES; MOMENTS; FEAL; IRON; SPIN; CO AB In order to investigate the possibility of pressure-dependent metamagnetic behavior of Fe3M (M=Al and Si) alloys we employed first-principles electronic-structure calculations by using a full-potential linearized-augmented-plane-wave method within the generalized-gradient approximation. We used the fixed-spin-moment approach. The theoretical equilibrium lattice constant, obtained by minimizing the total energy, is about 0.7% larger than the experimental one for Fe3Al. For the case of Fe3Si it is 1% smaller. If the volume decreases about 16% (9% for Fe3Si) from the equilibrium, the total magnetic moment decreases abruptly from 5.0 mu(B)/cell to 3.2 mu(B)/cell (from 4.6 mu(B)/cell to 4.2 mu(B)/cell for Fe3Si). Since this change is considerable(similar to67% for Fe3Al and similar to10% for Fe3Si), it is possible to measure this pressure-dependent metamagnetic behavior by a simple high-pressure experiment at about 80 kbar for Fe3Al and 50 kbar for Fe3Si. A detailed analysis of the site- and angular-momentum-decomposed density of states and occupation numbers reveals that the Fe atoms whose environment is different from that of elemental bcc-Fe (Fe-I) exhibit the pressure-dependent metamagnetism. C1 Hoseo Univ, Dept Phys, Asan 336795, Choongnam, South Korea. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys, Ames, IA 50011 USA. RP Rhee, JY (reprint author), Hoseo Univ, Dept Phys, Asan 336795, Choongnam, South Korea. EM rheejy@office.hoseo.ac.kr RI Rhee, Joo/D-2987-2011 NR 20 TC 12 Z9 12 U1 1 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 094411 DI 10.1103/PhysRevB.70.094411 PG 5 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200058 ER PT J AU Soderlind, P AF Soderlind, P TI Density-functional electronic structure of PuCoGa5 SO PHYSICAL REVIEW B LA English DT Article ID BRILLOUIN-ZONE; SPECIAL POINTS; DELTA-PU; SUPERCONDUCTIVITY; PLUTONIUM AB Density-functional electronic-structure calculations for PuCoGa5 are performed to address the possibility of magnetic interactions in this high-temperature superconductor. Within an itinerant 5f-electron picture, cohesion and crystallographic parameters compares favorably with experiment, whereas only when spin and orbital interactions are accounted for the calculated electronic density of states agrees with photoemission spectra. This fact suggests that spin and orbital correlations are important for a correct description of the PuCoGa5 electronic structure and may play a role in an unconventional mechanism for superconductivity. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Soderlind, P (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. NR 17 TC 8 Z9 8 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 094515 DI 10.1103/PhysRevB.70.094515 PG 3 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200092 ER PT J AU Swenson, CA Lograsso, TA Anderson, NE Ross, AR AF Swenson, CA Lograsso, TA Anderson, NE Ross, AR TI Bridgman-grown i-Al68.9Pd21.6Mn9.5 quasicrystal: Comparison of alpha, C-rho, sigma, and chi with those for flux-grown samples SO PHYSICAL REVIEW B LA English DT Article ID AL-PD-MN; ICOSAHEDRAL PHASE; MAGNETIC-PROPERTIES; CUBIC SYMMETRY; SINGLE GRAIN; RESISTIVITY; DEPENDENCE AB Thermal expansivity (alpha, 1-300 K), heat capacity (C-P, 1-108 K), electrical conductivity (sigma, 1-300 K) and magnetic susceptibility (chi, 1-300 K) data have been obtained for a Bridgman-grown single grain i-Al68.9Pd21.6Mn9.5 quasicrystal (BR) for direct comparison with data previously published for a flux-grown single grain sample [Phys. Rev. B 65, 184206 (2002); PRB], and present sigma, chi and C-P data for a second flux-grown sample described in an earlier publication [Philos. Mag. B 79, 1673 (1999); PM]. Fortuitously, comparative analyses show these samples to have essentially the same composition. At all temperatures, sigma and chi for BR are, respectively, approximately one-third and one-quarter those for PRB. The C-P's are the same (+/-1%) down to 30 K, below which the BR C-P decreases more rapidly to one-half that for PRB at 1 K. The alpha's agree to +/-2% from 300 to 40 K, with a more rapid decrease for BR below 30 K, eventually to 0.6 alpha(PRB) below 4 K. The total Gruneisen parameters are similar at all temperatures. The two methods for sample growth differ primarily in a quenching of the flux-grown sample to room temperature after growth, while the Bridgman-grown sample cools very slowly, resulting in slightly different phases, and magnetic properties which are associated with lattice defects. An attempt to convert the single grain flux-grown sample to the phase of the Bridgman sample using an 800degreesC anneal and a slow cool to room temperature was not successful, with the appearance of second phase inclusions. These inclusions are ascribed to slightly different compositions for the two phases [see Boissieu , Philos. Mag. A 78, 305 (1998)]. This suggests that a single grain flux-grown sample with an Mn composition near 9% cannot be converted by annealing and slow cooling into a single grain LT phase, and vice versa. These considerations may not apply to samples with Mn compositions closer to 8%. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Swenson, CA (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM swenson@ameslab.gov NR 35 TC 7 Z9 7 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 094201 DI 10.1103/PhysRevB.70.094201 PG 11 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200043 ER PT J AU Tanaka, K Yoshida, T Fujimori, A Lu, DH Shen, ZX Zhou, XJ Eisaki, H Hussain, Z Uchida, S Aiura, Y Ono, K Sugaya, T Mizuno, T Terasaki, I AF Tanaka, K Yoshida, T Fujimori, A Lu, DH Shen, ZX Zhou, XJ Eisaki, H Hussain, Z Uchida, S Aiura, Y Ono, K Sugaya, T Mizuno, T Terasaki, I TI Effects of next-nearest-neighbor hopping t ' on the electronic structure of cuprate superconductors SO PHYSICAL REVIEW B LA English DT Article ID 2-MAGNON RAMAN-SCATTERING; C SUPERCONDUCTORS; FERMI-SURFACE; PHOTOEMISSION; BI2SR2CACU2O8+DELTA; LA2-XSRXCUO4; FLUCTUATIONS; SYSTEMATICS; INSULATORS; DISPERSION AB Photoemission spectra of underdoped and lightly-doped Bi2-zPbzSr2Ca1-xRxCu2O8+y (R=Pr, Er) (BSCCO) have been measured and compared with those of La2-xSrxCuO4 (LSCO). The lower-Hubbard band of the insulating BSCCO, like Ca2CuO2Cl2, shows a stronger dispersion than La2CuO4 from ksimilar to(pi/2,pi/2) to similar to(pi,0). The flat band at ksimilar to(pi,0) is found generally deeper in BSCCO. These observations together with the Fermi-surface shapes and the chemical potential shifts indicate that the next-nearest-neighbor hopping \t(')\ of the single-band model is larger in BSCCO than in LSCO and that \t(')\ rather than the super-exchange J influences the pseudogap energy scale. C1 Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. Univ Tokyo, Dept Complex Sci & Engn, Tokyo 1130033, Japan. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. High Energy Accelerator Res Org, IMSS, Photon Factory, Tsukuba, Ibaraki 3050801, Japan. Waseda Univ, Dept Appl Phys, Tokyo 1698555, Japan. RP Tanaka, K (reprint author), Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. RI Ono, Kanta/I-3226-2014; TERASAKI, Ichiro/I-7083-2014 OI Ono, Kanta/0000-0002-3285-9093; TERASAKI, Ichiro/0000-0002-6073-2639 NR 37 TC 64 Z9 65 U1 3 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 092503 DI 10.1103/PhysRevB.70.092503 PG 4 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200019 ER PT J AU Thinh, NQ Vorona, IP Buyanova, IA Chen, WM Limpijumnong, S Zhang, SB Hong, YG Tu, CW Utsumi, A Furukawa, Y Moon, S Wakahara, A Yonezu, H AF Thinh, NQ Vorona, IP Buyanova, IA Chen, WM Limpijumnong, S Zhang, SB Hong, YG Tu, CW Utsumi, A Furukawa, Y Moon, S Wakahara, A Yonezu, H TI Identification of Ga-interstitial defects in GaNyP1-y and AlxGa1-xNyP1-y SO PHYSICAL REVIEW B LA English DT Article ID DETECTED MAGNETIC-RESONANCE; ELECTRON-PARAMAGNETIC-RESONANCE; ATOMIC PARAMETERS; SEMICONDUCTORS AB Two Ga-interstitial (Ga-i) defects are identified by optically detected magnetic resonance as common grown-in defects in molecular beam epitaxial GaNyP1-y and AlxGa1-xNyP1-y. Characteristic hyperfine structure arising from spin interaction between an unpaired electron and a Ga nucleus is clearly resolved. The observed strong and nearly isotropic hyperfine interaction reveals an electron wave function of A(1) symmetry that is highly localized at the Ga-i and thus a deep-level defect. Our analysis based on first-principles calculations suggests that these defects are complexes containing one Ga-i(2+). C1 Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden. Suranaree Univ Technol, Inst Sci, Sch Phys, Nakhon Ratchasima 30000, Thailand. Natl Renewable Energy Lab, Golden, CO 80401 USA. Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA. Toyohashi Univ Technol, Dept Elect & Elect Engn, Aichi 4418580, Japan. Inst Semicond Phys, UA-03028 Kiev, Ukraine. RP Thinh, NQ (reprint author), Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden. EM wmc@ifm.liu.se RI Wakahara, Akihiro/C-6653-2011; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013; Chen, Weimin/J-4660-2012; Buyanova, Irina/A-8924-2015 OI Zhang, Shengbai/0000-0003-0833-5860; Chen, Weimin/0000-0002-6405-9509; Buyanova, Irina/0000-0001-7155-7103 NR 22 TC 16 Z9 16 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 12 AR 121201 DI 10.1103/PhysRevB.70.121201 PG 4 WC Physics, Condensed Matter SC Physics GA 858RO UT WOS:000224209600002 ER PT J AU Ujfalussy, B Lazarovits, B Szunyogh, L Stocks, GM Weinberger, P AF Ujfalussy, B Lazarovits, B Szunyogh, L Stocks, GM Weinberger, P TI Ab initio spin dynamics applied to nanoparticles: Canted magnetism of a finite Co chain along a Pt(111) surface step edge SO PHYSICAL REVIEW B LA English DT Article ID DENSITY-FUNCTIONAL THEORY; NONCOLLINEAR MAGNETISM; FE CLUSTERS; CR; ANISOTROPY; MN AB In order to search for the magnetic ground state of surface nanostructures we extended first principles adiabatic spin dynamics to the case of fully relativistic electron scattering. Our method relies on a constrained density functional theory whereby the evolution of the orientations of the spin-moments results from a semi-classical Landau-Lifshitz equation. This approach is applied to a study of the ground state of a finite Co chain placed along a step edge of a Pt(111) surface. As far as the ground state spin orientation is concerned we obtain excellent agreement with the experiment. Furthermore we observe noncollinearity of the atom-resolved spin and orbital moments. In terms of magnetic force theorem calculations we also demonstrate how a reduction of symmetry leads to the existence of canted magnetic states. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Tech Univ Vienna, Ctr Computat Mat Sci, A-1060 Vienna, Austria. Budapest Univ Technol & Econ, Dept Theoret Phys, H-1521 Budapest, Hungary. Budapest Univ Technol & Econ, Ctr Appl Math & Computat Phys, H-1521 Budapest, Hungary. RP Ujfalussy, B (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. RI Szunyogh, Laszlo/A-7956-2010; Ujfalussy, Balazs/A-8155-2013; Stocks, George Malcollm/Q-1251-2016 OI Ujfalussy, Balazs/0000-0003-3338-4699; Stocks, George Malcollm/0000-0002-9013-260X NR 23 TC 42 Z9 42 U1 0 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 10 AR 100404 DI 10.1103/PhysRevB.70.100404 PG 4 WC Physics, Condensed Matter SC Physics GA 858RL UT WOS:000224209300007 ER PT J AU Wang, WH Wang, ZX Zhao, DQ Tang, MB Utsumi, W Wang, XL AF Wang, WH Wang, ZX Zhao, DQ Tang, MB Utsumi, W Wang, XL TI High-pressure suppression of crystallization in the metallic supercooled liquid Zr41Ti14Cu12.5Ni10Be22.5: Influence of viscosity SO PHYSICAL REVIEW B LA English DT Article ID GLASS-TRANSITION; ALLOY; BEHAVIOR; KINETICS; ENTROPY; WATER AB The supercooled liquid Zr41Ti14Cu12..5Ni10Be22.5 is studied using a high-pressure (HP) and high-temperature x-ray diffraction technique with synchrotron radiation, which allows us for the first time to in situ monitor the crystallization kinetics of metallic supercooled liquid in both cooling and heating processes under HP. We find that more than 6 GPa can completely suppress the crystallization in the melt at low cooling rate, and distinct crystallization from glassy to melt states during fast heating can be bypassed at 8.3 GPa. HP suppresses the crystallization in the supercooled liquid through increasing its viscosity. C1 Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China. Oak Ridge Natl Lab, Spallat Neutron Source & Met Ceram Div, Oak Ridge, TN 37830 USA. RP Wang, WH (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China. EM whw@aphy.iphy.ac.cn RI Wang, Xun-Li/C-9636-2010 OI Wang, Xun-Li/0000-0003-4060-8777 NR 27 TC 5 Z9 5 U1 3 U2 10 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 9 AR 092203 DI 10.1103/PhysRevB.70.092203 PG 4 WC Physics, Condensed Matter SC Physics GA 858RK UT WOS:000224209200006 ER PT J AU Wu, J Walukiewicz, W Yu, KM Denlinger, JD Shan, W Ager, JW Kimura, A Tang, HF Kuech, TF AF Wu, J Walukiewicz, W Yu, KM Denlinger, JD Shan, W Ager, JW Kimura, A Tang, HF Kuech, TF TI Valence band hybridization in N-rich GaN1-xAsx alloys SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-BEAM EPITAXY; V SEMICONDUCTOR ALLOYS; VAPOR-PHASE EPITAXY; GANAS ALLOYS; WURTZITE GAN; DISCONTINUITIES; STATES; ENERGY; LAYERS; GAASN AB We have used photomodulated transmission and optical absorption spectroscopies to measure the composition dependence of interband optical transitions in N-rich GaN1-xAsx alloys with x up to 0.06. The direct band gap gradually decreases as x increases. In the dilute x limit, the observed band gap approaches 2.8 eV; this limiting value is attributed to a transition between the As localized level, which has been previously observed in As-doped GaN at 0.6 eV above the valence band maximum in As-doped GaN, and the conduction band minimum. The structure of the valence band of GaN1-xAsx is explained by the hybridization of the localized As states with the extended valence band states of GaN matrix. The hybridization is directly confirmed by soft x-ray emission experiments. To describe the electronic structure of the GaN1-xAsx alloys in the entire composition range a linear interpolation is used to combine the effects of valence band hybridization in N-rich alloys with conduction band anticrossing in As-rich alloys. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Advance Light Source, Berkeley, CA 94720 USA. Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA. RP Wu, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM w_walukiewicz@lbl.gov RI Wu, Junqiao/G-7840-2011; Yu, Kin Man/J-1399-2012; OI Wu, Junqiao/0000-0002-1498-0148; Yu, Kin Man/0000-0003-1350-9642; Ager, Joel/0000-0001-9334-9751 NR 26 TC 65 Z9 65 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 11 AR 115214 DI 10.1103/PhysRevB.70.115214 PG 7 WC Physics, Condensed Matter SC Physics GA 858RN UT WOS:000224209500047 ER PT J AU Yu, Y Gu, CZ Xu, LF Zhang, SB AF Yu, Y Gu, CZ Xu, LF Zhang, SB TI Ab initio structural characterization of a hydrogen-covered diamond (001) surface SO PHYSICAL REVIEW B LA English DT Article ID SCANNING-TUNNELING-MICROSCOPY; SATURATED SI(100) SURFACE; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; C(100) SURFACES; DIMER RECONSTRUCTION; CHEMISORPTION AB The structural characterization of a hydrogen-covered diamond(001) surface has been investigated by density-functional theory with the plane-wave pseudopotential method and the generalized gradient approximation. Structures with different hydrogen coverage, from one to two monolayers, are considered. The formation energy of different phases is analyzed as a function of hydrogen chemical potential mu(H). As mu(H) increases, the (2x1):H phase, (2x2):1.5H trough phase [or (3x1):1.33H phase for a smooth surface], and the canted (1x1):2H phase each successively become the most stable phase. The phase proposed by us, the (2x2):1.5H trough surface phase, exists over a wide range of chemical potential, and can be expected to be found in experiments. C1 Chinese Acad Sci, Inst Phys, State Key Lab Surface Phys, Beijing 100080, Peoples R China. Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Chinese Acad Sci, Inst Phys, State Key Lab Surface Phys, POB 603, Beijing 100080, Peoples R China. EM czgu@aphy.iphy.ac.cn RI Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Zhang, Shengbai/0000-0003-0833-5860 NR 25 TC 18 Z9 20 U1 1 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 12 AR 125423 DI 10.1103/PhysRevB.70.125423 PG 6 WC Physics, Condensed Matter SC Physics GA 858RO UT WOS:000224209600086 ER PT J AU Zhang, Y Gao, F Jiang, W McCready, DE Weber, WJ AF Zhang, Y Gao, F Jiang, W McCready, DE Weber, WJ TI Damage accumulation and defect relaxation in 4H-SiC SO PHYSICAL REVIEW B LA English DT Article ID SILICON-CARBIDE; RUTHERFORD BACKSCATTERING; ELECTRICAL-PROPERTIES; HIGH-TEMPERATURE; IMPLANTATION; SIMULATION; CERAMICS; RECOVERY; DIODES AB A nonlinear dependence of damage disorder on dose is observed for both Si and C sublattices in 4H-SiC under 2 MeV Au irradiation at 165 K. The relative disorder observed along the <(4) over bar 40 (3) over bar > direction is much higher than that along the <0001> direction. Molecular dynamics (MD) simulations demonstrate that most interstitial configurations are formed on the Si-C dimer rows that are parallel to the <0001> direction. As a result, these interstitials are shielded by the Si and C atoms on the lattice sites, which significantly reduces the contribution of these interstitials to the backscattering/reaction yield along the <0001> direction. During isochronal annealing below room temperature, the relative disorder decreases along the <0001> direction, as expected; however, the disorder is stable on the Si sublattice and increases slightly on the C sublattice when measured along the <(4) over bar 40 (3) over bar > direction due to relaxation of some metastable defects to lower energy configurations. As the annealing temperature increases, similar recovery behavior on both Si and C sublattices along the <0001> direction indicates coupling of Si and C recovery processes; however, slightly higher recovery temperatures on the C sublattice along the <(4) over bar 40 (3) over bar > direction suggests some decoupling of the Si and C recovery processes. Based on the structures and energetics of defects from MD simulations, new insights into defect configurations and relaxation processes are described. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Zhang, Y (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM Yanwen.Zhang@pnl.gov RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012; OI Weber, William/0000-0002-9017-7365; Jiang, Weilin/0000-0001-8302-8313 NR 30 TC 26 Z9 27 U1 2 U2 19 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP PY 2004 VL 70 IS 12 AR 125203 DI 10.1103/PhysRevB.70.125203 PG 7 WC Physics, Condensed Matter SC Physics GA 858RO UT WOS:000224209600033 ER PT J AU Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhatia, VS Bichsel, H Billmeier, A Bland, LC Blyth, CO Bonner, BE Botje, M Boucham, A Brandin, A Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Carroll, J Castillo, J Cebra, D Chajecki, Z Chaloupka, P Chattopdhyay, S Chen, HF Chen, Y Cheng, J Cherney, M Chikanian, A Christie, W Coffin, JP Cormier, TM Cramer, JG Crawford, HJ Das, D Das, S de Moura, MM Derevschikov, AA Didenko, L Dietel, T Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Mazumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Foley, KJ Fomenko, K Fu, J Gagliardi, CA Gans, J Ganti, MS Gaudichet, L Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Janik, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Khodyrev, VY Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Klyachko, A Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kunz, CL Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lindenbaum, SJ Lisa, MA Liu, F Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Milosevich, Z Minaev, NG Mironov, C Mischke, A Mishra, D Mitchell, J Mohanty, B Molnar, L Moore, CF Mora-Corral, MJ Morozov, DA Morozov, V Munhoz, MG Nandi, BK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Norman, B Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rai, G Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Sakrejda, I Salur, S Sandweiss, J Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schroeder, LS Schweda, K Seger, J Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Simon, F Singaraju, RN Skoro, G Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Surrow, B Symons, TJM de Toledo, AS Szarwas, P Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, O Ulery, J Ullrich, T Underwood, DG Urkinbaev, A Buren, GV van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, VP Vokal, S Voloshin, SA Vznuzdaev, M Waggoner, B Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Wells, R Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yurevich, VI Zanevsky, YV Zhang, H Zhang, WM Zhang, ZP Zolnierczuk, PA Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN AF Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhatia, VS Bichsel, H Billmeier, A Bland, LC Blyth, CO Bonner, BE Botje, M Boucham, A Brandin, A Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Carroll, J Castillo, J Cebra, D Chajecki, Z Chaloupka, P Chattopdhyay, S Chen, HF Chen, Y Cheng, J Cherney, M Chikanian, A Christie, W Coffin, JP Cormier, TM Cramer, JG Crawford, HJ Das, D Das, S de Moura, MM Derevschikov, AA Didenko, L Dietel, T Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Mazumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Foley, KJ Fomenko, K Fu, J Gagliardi, CA Gans, J Ganti, MS Gaudichet, L Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Janik, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Khodyrev, VY Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Klyachko, A Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kunz, CL Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lindenbaum, SJ Lisa, MA Liu, F Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Milosevich, Z Minaev, NG Mironov, C Mischke, A Mishra, D Mitchell, J Mohanty, B Molnar, L Moore, CF Mora-Corral, MJ Morozov, DA Morozov, V Munhoz, MG Nandi, BK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Norman, B Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rai, G Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Sakrejda, I Salur, S Sandweiss, J Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schroeder, LS Schweda, K Seger, J Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Simon, F Singaraju, RN Skoro, G Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Surrow, B Symons, TJM de Toledo, AS Szarwas, P Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, O Ulery, J Ullrich, T Underwood, DG Urkinbaev, A Buren, GV van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, VP Vokal, S Voloshin, SA Vznuzdaev, M Waggoner, B Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Wells, R Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yurevich, VI Zanevsky, YV Zhang, H Zhang, WM Zhang, ZP Zolnierczuk, PA Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN CA STAR Collaboration TI Production of e(+)e(-) pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions SO PHYSICAL REVIEW C LA English DT Article ID TIME PROJECTION CHAMBER; GAMMA-GAMMA; COLLIDERS; PHOTON AB We present data on e(+)e(-) pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section. C1 Univ Birmingham, Birmingham, W Midlands, England. Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. CALTECH, Pasadena, CA 91125 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Creighton Univ, Omaha, NE 68178 USA. Nucl Phys Inst AS CR, Rez 25068, Czech Republic. Lab High Energy JINR, Dubna, Russia. Particle Phys Lab JINR, Dubna, Russia. Goethe Univ Frankfurt, D-6000 Frankfurt, Germany. Inst Phys, Bhubaneswar 751005, Orissa, India. Indian Inst Technol, Bombay 400076, Maharashtra, India. Indiana Univ, Bloomington, IN 47408 USA. Inst Rech Subatom, Strasbourg, France. Univ Jammu, Jammu 180001, India. Kent State Univ, Kent, OH 44242 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. MIT, Cambridge, MA 02139 USA. Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. Michigan State Univ, E Lansing, MI 48824 USA. Moscow Phys Engn Inst, Moscow, Russia. CUNY City Coll, New York, NY 10031 USA. NIKHEF, Amsterdam, Netherlands. Ohio State Univ, Columbus, OH 43210 USA. Panjab Univ, Chandigarh 160014, India. Penn State Univ, University Pk, PA 16802 USA. Inst High Energy Phys, Protvino, Russia. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rajasthan, Jaipur 302004, Rajasthan, India. Rice Univ, Houston, TX 77251 USA. Univ Sao Paulo, Sao Paulo, Brazil. Univ Sci & Technol China, Anhui 230027, Peoples R China. Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China. SUBATECH, Nantes, France. Texas A&M Univ, College Stn, TX 77843 USA. Univ Texas, Austin, TX 78712 USA. Tsinghua Univ, Beijing 100084, Peoples R China. Valparaiso Univ, Valparaiso, IN 46383 USA. Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India. Warsaw Univ Technol, Warsaw, Poland. Univ Washington, Seattle, WA 98195 USA. Wayne State Univ, Detroit, MI 48201 USA. CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China. Yale Univ, New Haven, CT 06520 USA. Univ Zagreb, HR-10002 Zagreb, Croatia. RP Univ Birmingham, Birmingham, W Midlands, England. RI Strikhanov, Mikhail/P-7393-2014; Kisiel, Adam/O-8754-2015; Chaloupka, Petr/E-5965-2012; Suaide, Alexandre/L-6239-2016; Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013; Sumbera, Michal/O-7497-2014; Planinic, Mirko/E-8085-2012; Castillo Castellanos, Javier/G-8915-2013; Skoro, Goran/P-1229-2014; Voloshin, Sergei/I-4122-2013; Peitzmann, Thomas/K-2206-2012; Chen, Yu/E-3788-2012; Takahashi, Jun/B-2946-2012; Barnby, Lee/G-2135-2010; Mischke, Andre/D-3614-2011; Witt, Richard/H-3560-2012; Skoro, Goran/F-3642-2010; Lednicky, Richard/K-4164-2013 OI Strikhanov, Mikhail/0000-0003-2586-0405; Kisiel, Adam/0000-0001-8322-9510; Suaide, Alexandre/0000-0003-2847-6556; Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900; Sumbera, Michal/0000-0002-0639-7323; Castillo Castellanos, Javier/0000-0002-5187-2779; Skoro, Goran/0000-0001-7745-9045; Peitzmann, Thomas/0000-0002-7116-899X; Takahashi, Jun/0000-0002-4091-1779; Barnby, Lee/0000-0001-7357-9904; NR 34 TC 51 Z9 51 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2004 VL 70 IS 3 AR 031902 DI 10.1103/PhysRevC.70.031902 PG 6 WC Physics, Nuclear SC Physics GA 860ES UT WOS:000224325900006 ER PT J AU Ambrozewicz, P Mitchell, J Dunne, J Markowitz, P Martoff, CJ Reinhold, J Zeidman, B Abbott, DJ Ahmidouch, A Armstrong, CS Arrington, J Assamagan, KA Bailey, K Baker, OK Beedoe, S Breuer, H Carlini, R Cha, J Collins, G Cothran, C Cummings, WJ Danagoulian, S Day, D Duncan, F Dutta, D Eden, T Ent, R Ewell, L Fortune, HT Gao, H Geesaman, DF Gueye, P Gustafsson, KK Hansen, JO Hinton, W Keppel, CE Klein, A Koltenuk, D Mack, DJ Madey, R Meekins, DG Mkrtchyan, H Mohring, RM Mtingwa, SK Niculescu, G Niculescu, I O'Neill, TG Potterveld, D Price, JW Raue, BA Roos, P Savage, G Sawafta, R Segel, RE Stepanyan, S Tadevosyan, V Tang, L Terburg, BP Wood, S Yan, C Zihlmann, B AF Ambrozewicz, P Mitchell, J Dunne, J Markowitz, P Martoff, CJ Reinhold, J Zeidman, B Abbott, DJ Ahmidouch, A Armstrong, CS Arrington, J Assamagan, KA Bailey, K Baker, OK Beedoe, S Breuer, H Carlini, R Cha, J Collins, G Cothran, C Cummings, WJ Danagoulian, S Day, D Duncan, F Dutta, D Eden, T Ent, R Ewell, L Fortune, HT Gao, H Geesaman, DF Gueye, P Gustafsson, KK Hansen, JO Hinton, W Keppel, CE Klein, A Koltenuk, D Mack, DJ Madey, R Meekins, DG Mkrtchyan, H Mohring, RM Mtingwa, SK Niculescu, G Niculescu, I O'Neill, TG Potterveld, D Price, JW Raue, BA Roos, P Savage, G Sawafta, R Segel, RE Stepanyan, S Tadevosyan, V Tang, L Terburg, BP Wood, S Yan, C Zihlmann, B TI Near threshold electroproduction of the omega meson at Q(2)approximate to 0.5 GeV2 SO PHYSICAL REVIEW C LA English DT Article ID RELATIVIZED QUARK-MODEL; HYPERFINE INTERACTIONS; SYMMETRY BREAKING; BARYON SPECTRUM; VIRTUAL PHOTONS; PHOTOPRODUCTION; DECAYS; CHROMODYNAMICS AB Electroproduction of the omega meson was investigated in the H-1(e,e(')p)omega reaction. The measurement was performed at a four-momentum transfer Q(2)approximate to0.5 GeV2. Angular distributions of the virtual photon-proton center-of-momentum cross sections have been extracted over the full angular range. These distributions exhibit a strong enhancement over t-channel parity exchange processes in the backward direction. According to a newly developed electroproduction model, this enhancement provides significant evidence of resonance formation in the gamma*p-->omegap reaction channel. C1 Temple Univ, Philadelphia, PA 19122 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Florida Int Univ, Miami, FL 33199 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Hampton Univ, Hampton, VA 23668 USA. Kent State Univ, Kent, OH 44242 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. N Carolina Agr & Tech State Univ, Greensboro, NC 27411 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Virginia, Charlottesville, VA USA. Northwestern Univ, Evanston, IL 60201 USA. Univ Penn, Philadelphia, PA 19104 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. Rensselaer Polytech Inst, Troy, NY 12180 USA. Univ Illinois, Urbana, IL 61801 USA. RP Ambrozewicz, P (reprint author), Florida Int Univ, Miami, FL 33199 USA. RI Gao, Haiyan/G-2589-2011; Arrington, John/D-1116-2012; Day, Donal/C-5020-2015 OI Arrington, John/0000-0002-0702-1328; Day, Donal/0000-0001-7126-8934 NR 33 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2004 VL 70 IS 3 AR 035203 DI 10.1103/PhysRevC.70.035203 PG 9 WC Physics, Nuclear SC Physics GA 860ES UT WOS:000224325900051 ER PT J AU Azimov, YI Strakovsky, II AF Azimov, YI Strakovsky, II TI Resonances and Theta-production mechanisms SO PHYSICAL REVIEW C LA English DT Article ID TOTAL CROSS SECTIONS; POSITIVE-STRANGENESS; BARYON RESONANCES; CHIRAL SOLITONS; PHOTOPRODUCTION; MODEL; PENTAQUARK; STATES; MESONS; SEARCH AB After explaining the necessity for exotic hadrons, we discuss mechanisms which could account for the production of the exotic Theta-baryon. A possible important role of resonances (producing the Theta in real or virtual decays) is advanced and emphasized for selected processes. Promising experimental investigations of such resonances, and the Theta itself, are suggested. We also briefly discuss recent negative results regarding the Theta-baryon. C1 Petersburg Nucl Phys Inst, St Petersburg 188300, Russia. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. George Washington Univ, Dept Phys, Ctr Nucl Studies, Washington, DC 20052 USA. RP Petersburg Nucl Phys Inst, St Petersburg 188300, Russia. EM azimov@pa1400.spb.edu; igor@gwu.edu NR 55 TC 10 Z9 10 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2004 VL 70 IS 3 AR 035210 DI 10.1103/PhysRevC.70.035210 PG 5 WC Physics, Nuclear SC Physics GA 860ES UT WOS:000224325900058 ER PT J AU Bhagwat, MS Holl, A Krassnigg, A Roberts, CD Tandy, PC AF Bhagwat, MS Holl, A Krassnigg, A Roberts, CD Tandy, PC TI Aspects and consequences of a dressed-quark-gluon vertex SO PHYSICAL REVIEW C LA English DT Article ID DYSON-SCHWINGER EQUATIONS; CHIRAL-SYMMETRY-BREAKING; INFRARED BEHAVIOR; QUANTUM CHROMODYNAMICS; LANDAU GAUGE; QCD; PROPAGATOR; MODEL; MASS; CONFINEMENT AB Features of the dressed-quark-gluon vertex and their role in the gap and Bethe-Salpeter equations are explored. It is argued that quenched lattice data indicate the existence of net attraction in the color-octet projection of the quark-antiquark scattering kernel. The study employs a vertex model whose diagrammatic content is explicitly enumerable. That enables the systematic construction of a vertex-consistent Bethe-Salpeter kernel and thereby an exploration of the consequences for the strong interaction spectrum of attraction in the color-octet channel. With rising current-quark mass the rainbow-ladder truncation is shown to provide an increasingly accurate estimate of a bound state's mass. Moreover, the calculated splitting between vector and pseudoscalar meson masses vanishes as the current-quark mass increases, which argues for the mass of the pseudoscalar partner of the Y(1S) to be above 9.4 GeV. With the amount of attraction suggested by lattice data color-antitriplet diquarks are absent from the strong interaction spectrum. C1 Kent State Univ, Dept Phys, Nucl Res Ctr, Kent, OH 44242 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany. RP Bhagwat, MS (reprint author), Kent State Univ, Dept Phys, Nucl Res Ctr, Kent, OH 44242 USA. NR 68 TC 115 Z9 117 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2004 VL 70 IS 3 AR 035205 DI 10.1103/PhysRevC.70.035205 PG 15 WC Physics, Nuclear SC Physics GA 860ES UT WOS:000224325900053 ER PT J AU Bugaev, KA AF Bugaev, KA TI Boundary conditions of the hydrocascade model and relativistic kinetic equations for finite domains SO PHYSICAL REVIEW C LA English DT Article ID TRANSVERSE-MOMENTUM SPECTRA; GLUON PLASMA HADRONIZATION; NUCLEUS-NUCLEUS COLLISIONS; QCD PHASE-TRANSITION; PARTICLE FREEZE-OUT; PB-PB COLLISIONS; PSI' MESONS; HYDRODYNAMICS; J/PSI; MATTER AB A detailed analysis of the coupled relativistic kinetic equations for two domains separated by a hypersurface having both space- and time-like parts is presented. Integrating the derived set of transport equations, we obtain the correct system of the hydro+cascade equations to model the relativistic nuclear collision process. Remarkably, the conservation laws on the boundary between domains conserve separately both the incoming and outgoing components of energy, momentum and baryonic charge. Thus, the relativistic kinetic theory generates twice the number of conservation laws compared to traditional hydrodynamics. Our analysis shows that these boundary conditions between domains, the three flux discontinuity, can be satisfied only by a special superposition of two cutoff distribution functions for the "out" domain. All these results are applied to the case of the phase transition between quark gluon plasma and hadronic matter. The possible consequences for an improved hydro+cascade description of the relativistic nuclear collisions are discussed. The unique properties of the three flux discontinuity and their effect on the space-time evolution of the transverse expansion are also analyzed. The possible modifications of both transversal radii from pion correlations generated by a correct hydro+cascade approach are discussed. C1 Bogolyubov Inst Theoret Phys, Kiev, Ukraine. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Bogolyubov Inst Theoret Phys, Kiev, Ukraine. NR 53 TC 11 Z9 11 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2004 VL 70 IS 3 AR 034903 DI 10.1103/PhysRevC.70.034903 PG 11 WC Physics, Nuclear SC Physics GA 860ES UT WOS:000224325900046 ER PT J AU Caia, GL Pascalutsa, V Tjon, JA Wright, LE AF Caia, GL Pascalutsa, V Tjon, JA Wright, LE TI gamma N-*Delta form factors from a relativistic dynamical model of pion electroproduction SO PHYSICAL REVIEW C LA English DT Article ID ELECTRON-DEUTERON SCATTERING; TRANSITION; RESONANCE; ISOBAR; PROTON; RATIO; Q2 AB We obtain the electromagnetic form factors of the gammaNDelta transition by analyzing recent pion-electroproduction data using a fully relativistic dynamical model. Special care is taken to satisfy Ward-Takahashi identities for the Born term in the presence of form factors, thereby allowing the use of realistic electromagnetic form factors of the nucleon and pion. We parametrize the Q(2) dependence of the bare gammaNDelta form factors by a three-parameter form which is consistent with the asymptotic behavior inferred from QCD. The parameters of the bare gammaNDelta form factors are the only free parameters of the model and are fitted to the differential cross-section and multipole-analysis data up to Q(2)=4(GeV/c)(2) in the Delta(1232)-resonance region. This analysis emphasizes the significance of the pion-cloud effects in the extraction of the resonance parameters. C1 Ohio Univ, Dept Phys & Astron, INPP, Athens, OH 45701 USA. Coll William & Mary, Dept Phys, Williamsburg, VA 23188 USA. Jefferson Lab, Theory Grp, Newport News, VA 23606 USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. RP Ohio Univ, Dept Phys & Astron, INPP, Athens, OH 45701 USA. EM caia@phy.ohiou.edu; vlad@jlab.org; tjon@jlab.org; wright@ohiou.edu NR 33 TC 18 Z9 18 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2004 VL 70 IS 3 AR 032201 DI 10.1103/PhysRevC.70.032201 PG 5 WC Physics, Nuclear SC Physics GA 860ES UT WOS:000224325900007 ER PT J AU Fissum, KG Liang, M Anderson, BD Aniol, KA Auerbach, L Baker, FT Berthot, J Bertozzi, W Bertin, PY Bimbot, L Boeglin, WU Brash, EJ Breton, V Breuer, H Burtin, E Calarco, JR Cardman, LS Cates, GD Cavata, C Chang, CC Chen, JP Cisbani, E Dale, DS de Jager, CW De Leo, R Deur, A Diederich, B Djawotho, P Domingo, J Ducret, JE Epstein, MB Ewell, LA Finn, JM Fonvieille, H Frois, B Frullani, S Gao, J Garibaldi, F Gasparian, A Gilad, S Gilman, R Glamazdin, A Glashausser, C Gomez, J Gorbenko, V Gorringe, T Hersman, FW Holmes, R Holtrop, M d'Hose, N Howell, C Huber, GM Hyde-Wright, CE Iodice, M Jaminion, S Jones, MK Joo, K Jutier, C Kahl, W Kato, S Kelly, JJ Kerhoas, S Khandaker, M Khayat, M Kino, K Korsch, W Kramer, L Kumar, KS Kumbartzki, G Laveissiere, G Leone, A LeRose, JJ Levchuk, L Lindgren, RA Liyanage, N Lolos, GJ Lourie, RW Madey, R Maeda, K Malov, S Manley, DM Margaziotis, DJ Markowitz, P Martino, J McCarthy, JS McCormick, K McIntyre, J van der Meer, RLJ Meziani, ZE Michaels, R Mougey, J Nanda, S Neyret, D Offermann, EAJM Papandreou, Z Perdrisat, CF Perrino, R Petratos, GG Platchkov, S Pomatsalyuk, R Prout, DL Punjabi, VA Pussieux, T Quemener, G Ransome, RD Ravel, O Roblin, Y Roche, R Rowntree, D Rutledge, GA Rutt, PM Saha, A Saito, T Sarty, AJ Serdarevic-Offermann, A Smith, TP Soldi, A Sorokin, P Souder, P Suleiman, R Templon, JA Terasawa, T Todor, L Tsubota, H Ueno, H Ulmer, PE Urciuoli, GM Vernin, P van Verst, S Vlahovic, B Voskanyan, H Watson, JW Weinstein, LB Wijesooriya, K Wojtsekhowski, B Zainea, DG Zeps, V Zhao, J Zhou, ZL Udias, JM Vignote, JR Ryckebusch, J Debruyne, D AF Fissum, KG Liang, M Anderson, BD Aniol, KA Auerbach, L Baker, FT Berthot, J Bertozzi, W Bertin, PY Bimbot, L Boeglin, WU Brash, EJ Breton, V Breuer, H Burtin, E Calarco, JR Cardman, LS Cates, GD Cavata, C Chang, CC Chen, JP Cisbani, E Dale, DS de Jager, CW De Leo, R Deur, A Diederich, B Djawotho, P Domingo, J Ducret, JE Epstein, MB Ewell, LA Finn, JM Fonvieille, H Frois, B Frullani, S Gao, J Garibaldi, F Gasparian, A Gilad, S Gilman, R Glamazdin, A Glashausser, C Gomez, J Gorbenko, V Gorringe, T Hersman, FW Holmes, R Holtrop, M d'Hose, N Howell, C Huber, GM Hyde-Wright, CE Iodice, M Jaminion, S Jones, MK Joo, K Jutier, C Kahl, W Kato, S Kelly, JJ Kerhoas, S Khandaker, M Khayat, M Kino, K Korsch, W Kramer, L Kumar, KS Kumbartzki, G Laveissiere, G Leone, A LeRose, JJ Levchuk, L Lindgren, RA Liyanage, N Lolos, GJ Lourie, RW Madey, R Maeda, K Malov, S Manley, DM Margaziotis, DJ Markowitz, P Martino, J McCarthy, JS McCormick, K McIntyre, J van der Meer, RLJ Meziani, ZE Michaels, R Mougey, J Nanda, S Neyret, D Offermann, EAJM Papandreou, Z Perdrisat, CF Perrino, R Petratos, GG Platchkov, S Pomatsalyuk, R Prout, DL Punjabi, VA Pussieux, T Quemener, G Ransome, RD Ravel, O Roblin, Y Roche, R Rowntree, D Rutledge, GA Rutt, PM Saha, A Saito, T Sarty, AJ Serdarevic-Offermann, A Smith, TP Soldi, A Sorokin, P Souder, P Suleiman, R Templon, JA Terasawa, T Todor, L Tsubota, H Ueno, H Ulmer, PE Urciuoli, GM Vernin, P van Verst, S Vlahovic, B Voskanyan, H Watson, JW Weinstein, LB Wijesooriya, K Wojtsekhowski, B Zainea, DG Zeps, V Zhao, J Zhou, ZL Udias, JM Vignote, JR Ryckebusch, J Debruyne, D CA Jefferson Lab Hall A Collaboration TI Dynamics of the quasielastic O-16(e,e ' p) reaction at Q(2)approximate to 0.8 (GeV/c)(2) SO PHYSICAL REVIEW C LA English DT Review ID ELECTROMAGNETIC FORM-FACTORS; FINAL-STATE INTERACTIONS; ELECTRON-SCATTERING; E,E'P REACTIONS; IMPULSE APPROXIMATION; REACTION C-12(E,E'P); NUCLEUS SCATTERING; PROTON-KNOCKOUT; JEFFERSON-LAB; E'P REACTIONS AB The physics program in Hall A at Jefferson Lab commenced in the summer of 1997 with a detailed investigation of the O-16(e,e(')p) reaction in quasielastic, constant (q,omega) kinematics at Q(2)approximate to0.8 (GeV/c)(2), qapproximate to1 GeV/c, and omegaapproximate to445 MeV. Use of a self-calibrating, self-normalizing, thin-film waterfall target enabled a systematically rigorous measurement. Five-fold differential cross-section data for the removal of protons from the 1p-shell have been obtained for 0