FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Logan, J Fowler, J Ding, YS Franceshi, D Wang, GJ Volkow, N Schlyer, DJ Gatley, SJ Alexoff, D Felder, C Zhu, W AF Logan, J Fowler, J Ding, YS Franceshi, D Wang, GJ Volkow, N Schlyer, DJ Gatley, SJ Alexoff, D Felder, C Zhu, W TI A strategy for the formation of parametric PET images of the irreversible MAO A tracers C-11-clorgyline and deuterium substituted C-11-clorgyline. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 197 BP 54P EP 55P AR UNSP 200988 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800198 ER PT J AU Schlyer, DJ Stoll, SP Woody, CL Vaska, P Shokouhi, S Volkow, ND Fowler, JS AF Schlyer, DJ Stoll, SP Woody, CL Vaska, P Shokouhi, S Volkow, ND Fowler, JS TI A beta microprobe for in situ measurement of the blood radioactivity curve in PET scanning of small animals. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 211 BP 58P EP 58P AR UNSP 202045 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800212 ER PT J AU Weber, S Bruyndonckx, P Chatziioannou, AF Clark, JC Daube-Witherspoon, ME Di Domenico, G Zavattini, G Honer, M Huber, J Karp, JS Laforest, R Muehllehner, G Pichler, BJ Seidel, J Siegel, S Spinks, T Tai, YC Vaquero, JJ AF Weber, S Bruyndonckx, P Chatziioannou, AF Clark, JC Daube-Witherspoon, ME Di Domenico, G Zavattini, G Honer, M Huber, J Karp, JS Laforest, R Muehllehner, G Pichler, BJ Seidel, J Siegel, S Spinks, T Tai, YC Vaquero, JJ TI Performance measurements of small animal positron emission tomographs. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Forschungszentrum Julich, Cent Elect Lab, Julich, Germany. Free Univ Brussels, IIHE, Brussels, Belgium. Univ Calif Los Angeles, Sch Med, Los Angeles, CA 90024 USA. Univ Cambridge, Wolfson Brain Imaging Ctr, Cambridge CB2 1TN, England. Univ Penn, Fairfax Stn, VA USA. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Paul Scherrer Inst, Ctr Radiopharmaceut Sci, Villigen, Switzerland. Univ Hosp, Villigen, Switzerland. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA. Washington Univ, Sch Med, Mallinckrodt Inst Radiol, St Louis, MO 63130 USA. Med Syst, Philadelphia, PA USA. Tech Univ Munich, Klinikum Rechts Isar, Nukl Med Klin & Poliklin, D-8000 Munich, Germany. NIH, Dept Nucl Med, Bethesda, MD 20892 USA. Concorde Microsyst, Knoxville, TN USA. Imaging Res Solut Ltd, Hammersmith Hosp, London, England. Hosp Gen Univ Gregorio Maranon, Unidad Med & Circugia Expt, Madrid, Spain. RI Vaquero, Juan Jose/D-3033-2009; Beer, Simone/E-1486-2017 OI Vaquero, Juan Jose/0000-0001-9200-361X; Beer, Simone/0000-0003-4290-4051 NR 0 TC 1 Z9 1 U1 0 U2 1 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 212 BP 59P EP 59P AR UNSP 200314 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800213 ER PT J AU Alexoff, D Marsteller, D Vaska, P Logan, J Taintor, N Thanos, P Fowler, J AF Alexoff, D Marsteller, D Vaska, P Logan, J Taintor, N Thanos, P Fowler, J TI Reproducibility of the distribution volume ratio in the rat brain using C-11-raclopride and microPET. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 219 BP 60P EP 61P AR UNSP 201279 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800220 ER PT J AU Shen, S DeNardo, SJ Richman, CM Yuan, A Siantar, CLH O'Donnell, RT DeNardo, GL AF Shen, S DeNardo, SJ Richman, CM Yuan, A Siantar, CLH O'Donnell, RT DeNardo, GL TI Planning time for peripheral blood stem cell transfusion using patent-specific dosimetry for high dose radioimmunotherapy. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Univ Alabama, Birmingham, AL USA. Univ Calif Davis, Sacramento, CA 95817 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 312 BP 86P EP 87P AR UNSP 202032 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800313 ER PT J AU Ding, YS Studenov, A Fowler, JS Volkow, ND AF Ding, YS Studenov, A Fowler, JS Volkow, ND TI Stereoselective transport of C-11 labeled BPA: Potential for imaging of melanoma. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 317 BP 88P EP 88P AR UNSP 200691 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800318 ER PT J AU Smith, MF Raylman, RR Majewski, S Weisenberger, AG AF Smith, MF Raylman, RR Majewski, S Weisenberger, AG TI Iterative maximum likelihood expectation maximization image reconstruction for positron emission mammography. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA. W Virginia Univ, Morgantown, WV 26506 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 373 BP 104P EP 104P AR UNSP 201228 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800374 ER PT J AU Schiffer, WK Marsteller, D Gerasimov, MR Carter, P King, P Shea, C Logan, J Alexoff, DL Dewey, SL AF Schiffer, WK Marsteller, D Gerasimov, MR Carter, P King, P Shea, C Logan, J Alexoff, DL Dewey, SL TI Functional alterations in GABAergic or glutamatergic modulation of dopamine (DA) by chronic neuroleptic treatment: Positron emission tomography (PET) studies in healthy primates. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 380 BP 106P EP 106P AR UNSP 201631 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800381 ER PT J AU Volkow, ND Wang, GJ Fowler, JS Logan, J Felder, C Gatley, SJ Ding, YS Pappas, N AF Volkow, ND Wang, GJ Fowler, JS Logan, J Felder, C Gatley, SJ Ding, YS Pappas, N TI Evidence that the effects of methylphenidate in the human brain are sensitive to expectation. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 386 BP 107P EP 107P AR UNSP 200800 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800387 ER PT J AU Volkow, ND Wang, GJ Fowler, JS Logan, J Jayne, M Wong, C Ding, Y Pappas, N Gifford, A AF Volkow, ND Wang, GJ Fowler, JS Logan, J Jayne, M Wong, C Ding, Y Pappas, N Gifford, A TI Evidence that "non-hedonic" food motivation in humans involves dopamine in the dorsal striatum. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 388 BP 108P EP 108P AR UNSP 200790 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800389 ER PT J AU Ding, YS Studenov, A Garza, V Gerasimov, M AF Ding, YS Studenov, A Garza, V Gerasimov, M TI Specific binding of C-11-GVG, a suicide inhibitor of GABA-T: Implications for its treatment of substance abuse. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 398 BP 111P EP 111P AR UNSP 201238 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800399 ER PT J AU Meredith, R Shen, S Breitz, H Fisher, D Goris, M Knox, S Hankins, J Vose, J Picozzi, V AF Meredith, R Shen, S Breitz, H Fisher, D Goris, M Knox, S Hankins, J Vose, J Picozzi, V TI Pretarget radioimmunotherapy (RIT) with anti-CD20 fusion protein in patients with non-Hodgkin's lymphoma (NHL). SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Univ Alabama, Birmingham, AL USA. NEORX Corp, Seattle, WA 98119 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Stanford Univ, Stanford, CA 94305 USA. Univ Nebraska, Omaha, NE 68182 USA. Virginia Mason Med Ctr, Seattle, WA 98101 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 419 BP 116P EP 117P AR UNSP 202225 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800420 ER PT J AU Kolsky, KL Mausner, L Srivastava, S AF Kolsky, KL Mausner, L Srivastava, S TI Production of Tc-95m from silver targets with high energy protons at BLIP. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Brookhaven Natl Lab, Stony Brook, NY USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 498 BP 137P EP 137P AR UNSP 200971 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800499 ER PT J AU Klein, GJ Reutter, BW Huesman, RH AF Klein, GJ Reutter, BW Huesman, RH TI Continuously rebinned gating for respiratory motion compensation in cardiac PET. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 523 BP 144P EP 144P AR UNSP 201672 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800524 ER PT J AU Sitek, A Gullberg, GT Huesman, RH AF Sitek, A Gullberg, GT Huesman, RH TI Improved lesion contrast and reduced liver interference using parametric images. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA. Univ Utah, Salt Lake City, UT USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 522 BP 144P EP 144P AR UNSP 202586 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800523 ER PT J AU Qi, J Huesman, RH AF Qi, J Huesman, RH TI Correction of motion in PET using event-based rebinning method: Pitfall and solution. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. RI Qi, Jinyi/A-1768-2010 OI Qi, Jinyi/0000-0002-5428-0322 NR 0 TC 2 Z9 2 U1 0 U2 2 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 530 BP 146P EP 146P PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800531 ER PT J AU Moses, WW AF Moses, WW TI Potential uses for improved coincidence timing accuracy in PET. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 934 BP 229P EP 229P AR UNSP 200298 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800844 ER PT J AU Pivovaroff, MJ Craig, W Ziock, K Barber, W Iwata, K Hasegawa, BH AF Pivovaroff, MJ Craig, W Ziock, K Barber, W Iwata, K Hasegawa, BH TI Design of gamma-ray optics for small animal imaging. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Calif San Francisco, San Francisco, CA 94143 USA. RI Pivovaroff, Michael/M-7998-2014 OI Pivovaroff, Michael/0000-0001-6780-6816 NR 0 TC 1 Z9 1 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 944 BP 231P EP 232P AR UNSP 200276 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800854 ER PT J AU Weisenberger, AG Majewski, S Smith, MF Meikle, SR Bradley, EL Welsh, RE Saha, MS Gleason, SS Paulus, MJ Glover, DK Goode, AR Williams, MB AF Weisenberger, AG Majewski, S Smith, MF Meikle, SR Bradley, EL Welsh, RE Saha, MS Gleason, SS Paulus, MJ Glover, DK Goode, AR Williams, MB TI High resolution detector modules based on high granularity NaI(T1) arrays utilizing optimized collimator designs customized for small animal single photon imaging. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA. Royal Prince Alfred Hosp, Sydney, NSW, Australia. Coll William & Mary, Williamsburg, VA USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Univ Virginia, Charlottesville, VA 22903 USA. RI Meikle, Steven/A-5470-2009 OI Meikle, Steven/0000-0001-7397-0364 NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 942 BP 231P EP 231P AR UNSP 202556 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800852 ER PT J AU Fowler, JS Logan, J Wang, GJ Volkow, ND Zhu, W Franceschi, D Pappas, N Ferrieri, RA Shea, C Garza, V Xu, Y MacGregor, RR Schlyer, DJ Ding, YS Alexoff, D AF Fowler, JS Logan, J Wang, GJ Volkow, ND Zhu, W Franceschi, D Pappas, N Ferrieri, RA Shea, C Garza, V Xu, Y MacGregor, RR Schlyer, DJ Ding, YS Alexoff, D TI PET imaging of monoamine oxidase B in peripheral organs in humans. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 961 BP 236P EP 236P AR UNSP 200587 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800871 ER PT J AU Thanos, P Taintor, N Alexoff, D Logan, J Grandy, D Fang, Y Lee, J Fowler, JS Volkow, ND AF Thanos, P Taintor, N Alexoff, D Logan, J Grandy, D Fang, Y Lee, J Fowler, JS Volkow, ND TI Comparative imaging of D2 knockout and wild type mice with C-11 raclopride and microPET. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Oregon Hlth Sci Univ, Portland, OR 97201 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 972 BP 239P EP 239P AR UNSP 200785 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800882 ER PT J AU Wang, GJ Chang, L Volkow, ND Telang, F Carasig, D Logan, J Pappas, N Fowler, JS AF Wang, GJ Chang, L Volkow, ND Telang, F Carasig, D Logan, J Pappas, N Fowler, JS TI Effects of human immunodeficiency virus infection in brain dopamine transporters and D2 receptors. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1025 BP 252P EP 253P AR UNSP 200927 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800935 ER PT J AU Ding, YS Fowler, JS Volkow, ND AF Ding, YS Fowler, JS Volkow, ND TI Is the l-enantiomer of methylphenidate (ritalin) inactive in the brain when the drug is given orally? SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1043 BP 257P EP 258P AR UNSP 200984 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560800953 ER PT J AU Budinger, TF Bunker, SR Hawkins, RA AF Budinger, TF Bunker, SR Hawkins, RA TI Value of FDG-PET for breast cancer patients. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. Calif Pacific Med Ctr, San Francisco, CA USA. Univ Calif San Francisco, San Francisco, CA 94143 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1160 BP 287P EP 287P AR UNSP 201652 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560801070 ER PT J AU Biegon, A Hanrahan, S Ono, M Alvarado, M AF Biegon, A Hanrahan, S Ono, M Alvarado, M TI Development of CNS5161 for NMDA receptor imaging. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 LBNL, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1447 BP 360P EP 360P AR UNSP 200180 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560801358 ER PT J AU Li, Z Ding, YS Gifford, A Glass, J Fowler, J Gatley, J AF Li, Z Ding, YS Gifford, A Glass, J Fowler, J Gatley, J TI Synthesis of N-(2-fluoro-5-(3 '-iodobenzoyl)benzyl)-2-bromoacetamide for labeling oligonucleotides with both F-18 and iodine isotopes. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1452 BP 361P EP 361P AR UNSP 200516 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560801363 ER PT J AU Srivastava, SC Meinken, GE Li, Z Barkigia, K Mausner, LF Kolsky, KL AF Srivastava, SC Meinken, GE Li, Z Barkigia, K Mausner, LF Kolsky, KL TI A novel synthetic method for preparing Sn-177m stannic DTPA for therapeutic use. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1497 BP 372P EP 372P AR UNSP 202175 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560801408 ER PT J AU Srivastava, SC Meinken, GE Awasthi, V Springer, K Mausner, LF Kolsky, KL Freimuth, P AF Srivastava, SC Meinken, GE Awasthi, V Springer, K Mausner, LF Kolsky, KL Freimuth, P TI Development of novel ligands based on adenoviral protein scaffolds for molecular imaging. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 2002 VL 43 IS 5 SU S MA 1513 BP 376P EP 376P AR UNSP 200931 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 551KL UT WOS:000175560801424 ER PT J AU Gailer, J George, GN Pickering, IJ Buttigieg, GA Denton, MB Glass, RS AF Gailer, J George, GN Pickering, IJ Buttigieg, GA Denton, MB Glass, RS TI Synthesis, X-ray absorption spectroscopy and purification of the seleno-bis (S-glutathionyl) arsinium anion from selenide, arsenite and glutathione SO JOURNAL OF ORGANOMETALLIC CHEMISTRY LA English DT Article DE X-ray absorption spectroscopy; size-exclusion chromatography; S-glutathionyl; arsinium anion ID SIZE-EXCLUSION CHROMATOGRAPHY; SEMIEMPIRICAL METHODS; OPTIMIZATION; PARAMETERS; ION AB We report a new synthesis of the seleno-bis (S-glutathionyl) arsinium anion, [(GS)(2)AsSe]. An aqueous solution of bis-glutathionylarsenous acid. (GS)(2)As-OH, prepared from stoichiometric glutathione and arsenite. was reacted in situ with a solution of sodium hydrogen selenide. prepared from elemental selenium and sodium borohydride. Analysis of the arsenic and selenium K-edge X-ray absorption spectra indicated virtually quantitative formation of [(GS)(2)AsSe](-), with As-Se and As-S distances of 2.31 and 2.25 Angstrom, respectively, and the concentrated sample allowed a definitive X-ray spectroscopic characterization. Size-exclusion chromatography was used to separate [(GS)(2)AsSe] from residual borate in the reaction mixture. (C) 2002 Elsevier Science B.V. All rights reserved. C1 GSF Forschungszentrum Umwelt & Gesundheit GMBH, Inst Ecol Chem, D-85764 Neuherberg, Germany. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Univ Arizona, Dept Chem, Tucson, AZ 85721 USA. RP Gailer, J (reprint author), GSF Forschungszentrum Umwelt & Gesundheit GMBH, Inst Ecol Chem, Ingolstadter Landstr 1, D-85764 Neuherberg, Germany. RI George, Graham/E-3290-2013; Pickering, Ingrid/A-4547-2013; OI Pickering, Ingrid/0000-0002-0936-2994 NR 16 TC 16 Z9 16 U1 0 U2 4 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0022-328X J9 J ORGANOMET CHEM JI J. Organomet. Chem. PD MAY 1 PY 2002 VL 650 IS 1-2 BP 108 EP 113 AR PII S0022-328X(02)01192-0 DI 10.1016/S0022-328X(02)01192-0 PG 6 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 557DX UT WOS:000175893500014 ER PT J AU Yonker, CR Linehan, JC AF Yonker, CR Linehan, JC TI Investigation of the hydroformylation of ethylene in liquid carbon dioxide SO JOURNAL OF ORGANOMETALLIC CHEMISTRY LA English DT Article DE high pressure NMR; carbon dioxide; hydroformylation; rhodium; ethylene ID HOMOGENEOUS CATALYTIC HYDROFORMYLATION; HIGH-PRESSURE NMR; SUPERCRITICAL FLUIDS; IN-SITU; HYDROGENATION; LIGAND; DIPHOSPHINE; SELECTIVITY; PROPYLENE; 1-OCTENE AB In situ, high-pressure NMR was used to investigate the hydroformylation reaction of ethylene in liquid CO2 using Rh(CO)(2)acac as the catalyst precursor and (p-CF3C6H4)(3)P, tris(p-trifluoromethylphenyl)phosphine. as the ligand under different thermodynamic conditions (T= 10-23 degreesC P-CO = P-H2 = 10-15 bar. P-C3H4 = 10-15 bar. P-CO2 = 207 bar). H-1-NMR was used to monitor the reaction progress of the hydroformylation of ethylene with a rhodium catalyst under select conditions of temperature and CO2 solvent pressure. Potential resting states of the rhodium catalyst were investigated by P-31{H-1}-NMR. This is the first description of a rhodium catalyzed hydroformylation reaction in liquid CO2 monitored in situ by high pressure NMR. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. RP Yonker, CR (reprint author), Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. NR 31 TC 24 Z9 24 U1 0 U2 7 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0022-328X J9 J ORGANOMET CHEM JI J. Organomet. Chem. PD MAY 1 PY 2002 VL 650 IS 1-2 BP 249 EP 257 AR PII S0022-328X(02)01217-2 DI 10.1016/S0022-328X(02)01217-2 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 557DX UT WOS:000175893500029 ER PT J AU Zarestky, JL Stassis, C Goldman, AI Canfield, PC Shirane, G Shapiro, SM AF Zarestky, JL Stassis, C Goldman, AI Canfield, PC Shirane, G Shapiro, SM TI Phonon-phonon interactions in (Lu, Y)Ni2B2C SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article DE intermetallic compounds; phonons; superconductivity; lattice dynamics; anharmonicity ID NICKEL BORIDE CARBIDES; SUPERCONDUCTING LUNI2B2C; SCATTERING; NEUTRON AB The temperature dependence of the Delta(4) acoustic and optic mode, measured at q = (0.5, 0, 0) in LuNi2B2C, YNi2B2C were extended to 1000 K and new measurements on the mixed compound, Y0.5Lu0.5Ni2B2C, were undertaken to explore the mode coupling in these materials. The temperature behavior of each is different and cannot be explained by a simple mode coupling scheme of the acoustic and optic modes. Published by Elsevier Science Ltd. C1 Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Zarestky, JL (reprint author), Iowa State Univ, Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RI Canfield, Paul/H-2698-2014 NR 14 TC 3 Z9 3 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD MAY PY 2002 VL 63 IS 5 BP 811 EP 814 AR PII S0022-3697(01)00233-5 DI 10.1016/S0022-3697(01)00233-5 PG 4 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA 536BN UT WOS:000174681000012 ER PT J AU Murphy, JJ Krier, H AF Murphy, JJ Krier, H TI Evaluation of ultrasound technique for solid-propellant burning-rate response measurements SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID RANDOM PARTICULATE COMPOSITES; HIGHLY FILLED ELASTOMERS; TIME-DELAY ESTIMATION; VISCOELASTIC RESPONSE; PRESSURE; ADHESION; SURFACE; MOTORS AB The development of an ultrasound technique for precisely measuring the instantaneous regression rate of a solid-rocket propellant under transient conditions is reviewed. The technique is used to measure the burning-rate response of several solid propellants to an oscillatory chamber pressure with a frequency of up to 300 Hz. This measurement is known as the propellant's pressure-coupled response function and is used as an input into rocket stability prediction models. The ultrasound waveforms are analyzed using cross-correlation and other digital signal processing techniques to determine burning rate. Digital methods are less prone to bias and offer greater flexibility than other techniques previously used. The resulting data are corrected for compression effects. The effects of a changing thermal profile on the measurement are discussed. Other phenomena that may corrupt the measurement, such as surface roughness, are also covered. Results of the experiments are compared to data from two other measurement techniques: a T-burner and a magnetic flowmeter. C1 Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA. RP Murphy, JJ (reprint author), Sandia Natl Labs, Combust Res Facil, POB 969,MS 9052, Livermore, CA 94551 USA. NR 66 TC 6 Z9 6 U1 1 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAY-JUN PY 2002 VL 18 IS 3 BP 641 EP 651 DI 10.2514/2.5978 PG 11 WC Engineering, Aerospace SC Engineering GA 552AG UT WOS:000175595700018 ER PT J AU Woodbury, RL Varnum, SM Zangar, RC AF Woodbury, RL Varnum, SM Zangar, RC TI Elevated HGF levels in sera from breast cancer patients detected using a protein microarray ELISA SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE microarray; ELISA; breast cancer; hepatocyte growth factor ID LINKED-IMMUNOSORBENT-ASSAY; PROSTATE-SPECIFIC ANTIGEN; HEPATOCYTE GROWTH-FACTOR; PROGNOSTIC FACTORS; ANTIBODY ARRAYS; TUMOR; WOMEN; RECEPTOR; PLATFORM; BENIGN AB We developed an ELISA in high-density microarray format to detect hepatocyte growth factor (HGF) in human serum. The microassay can detect HGF at sub-pg/mL concentrations in sample volumes of 100 muL or less. The microassay is also quantitative and was used to detect elevated HGF levels in sera from recurrent breast cancer patients. The microarray format provides the potential for high-throughput quantitation of multiple biomarkers in parallel, as demonstrated with a multiplex analysis of five biomarker proteins. C1 Pacific NW Natl Lab, Mol Biosci Dept, Richland, WA 99352 USA. RP Zangar, RC (reprint author), Pacific NW Natl Lab, Mol Biosci Dept, P7-56,POB 999, Richland, WA 99352 USA. NR 33 TC 85 Z9 88 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1535-3893 J9 J PROTEOME RES JI J. Proteome Res. PD MAY-JUN PY 2002 VL 1 IS 3 BP 233 EP 237 DI 10.1021/pr025506q PG 5 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 597UK UT WOS:000178239000006 PM 12645900 ER PT J AU VerBerkmoes, NC Bundy, JL Hauser, L Asano, KG Razumovskaya, J Larimer, F Hettich, RL Stephenson, JL AF VerBerkmoes, NC Bundy, JL Hauser, L Asano, KG Razumovskaya, J Larimer, F Hettich, RL Stephenson, JL TI Integrating "top-down" and "bottom-up" mass spectrometric approaches for proteomic analysis of Shewanella oneidensis SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE microbial proteomics; mass spectrometry; intact proteins; LC-MS/MS; database searching ID POLYACRYLAMIDE-GEL ELECTROPHORESIS; PROTEIN IDENTIFICATION TECHNOLOGY; 2-DIMENSIONAL ELECTROPHORESIS; SEQUENCE DATABASES; SEPARATED PROTEINS; PUTREFACIENS MR-1; SPECTRAL DATA; CHROMATOGRAPHY; MIXTURES; TIME AB Here we present a comprehensive method for proteome analysis that integrates both intact protein measurement ("top-down") and proteolytic fragment characterization ("bottom-up") mass spectrometric approaches, capitalizing on the unique capabilities of each method. This integrated approach was applied in a preliminary proteomic analysis of Shewanella oneidensis, a metal-reducing microbe of potential importance to the field of bioremediation. Cellular lysates were examined directly by the "bottom-up" approach as well as fractionated via anion-exchange liquid chromatography for integrated studies. A portion of each fraction was proteolytically digested, with the resulting peptides characterized by online liquid chromatography/tandem mass spectrometry. The remaining portion of each fraction containing the intact proteins was examined by high-resolution Fourier transform mass spectrometry. This "top-down" technique provided direct measurement of the molecular masses for the intact proteins and thereby enabled confirmation of post-translational modifications, signal peptides, and gene start sites of proteins detected in the "bottom-up" experiments. A total of 868 proteins from virtually every functional class, including hypotheticals, were identified from this organism. C1 Oak Ridge Natl Lab, Organ & Biol Mass Spectrometry Grp, Div Chem Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Oak Ridge Natl Lab, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37830 USA. RP Hettich, RL (reprint author), Oak Ridge Natl Lab, Organ & Biol Mass Spectrometry Grp, Div Chem Sci, POB 2008, Oak Ridge, TN 37831 USA. RI Bundy, Jonathan/A-8647-2009; Stephenson, James/A-9262-2009; Hauser, Loren/H-3881-2012; Asano, Keiji/L-3164-2016; Hettich, Robert/N-1458-2016 OI Asano, Keiji/0000-0003-2254-3586; Hettich, Robert/0000-0001-7708-786X NR 45 TC 107 Z9 114 U1 2 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1535-3893 J9 J PROTEOME RES JI J. Proteome Res. PD MAY-JUN PY 2002 VL 1 IS 3 BP 239 EP 252 DI 10.1021/pr025508a PG 14 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 597UK UT WOS:000178239000007 PM 12645901 ER PT J AU He, Y Yeung, ES AF He, Y Yeung, ES TI Rapid determination of protein molecular weight by the Ferguson method and multiplexed capillary electrophoresis SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE electrophoresis; SDS-PAGE; size separation ID DODECYL-SULFATE; GEL-ELECTROPHORESIS; POLYACRYLAMIDE; PROTEOMICS AB method based on the use of the Ferguson method and multiplexed sodium dodecyl sulfate-capillary gel electrophoresis (SDS-CGE) with UV detection was demonstrated for the rapid determination of molecular weights of proteins. The method employs a capillary array where different uncoated capillaries are filled with gel buffers containing different concentrations of poly(ethylene oxide) (PEO). All data required to construct Ferguson plots and universal calibration curves for the determination of the molecular weights of diverse types of proteins are generated simultaneously in an eight-capillary array within 20 min. C1 Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Yeung, ES (reprint author), Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA. NR 20 TC 18 Z9 18 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1535-3893 J9 J PROTEOME RES JI J. Proteome Res. PD MAY-JUN PY 2002 VL 1 IS 3 BP 273 EP 277 DI 10.1021/pr025507i PG 5 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 597UK UT WOS:000178239000010 PM 12645904 ER PT J AU Okandan, M AF Okandan, M TI Presentation highlights: Micro-Electro-Mechanical Systems (MEMS) SO JOURNAL OF REHABILITATION RESEARCH AND DEVELOPMENT LA English DT Article; Proceedings Paper CT Roundtable Meeting on VA/NIH Prosthetics CY JUN 25, 2001 CL ROCKVILLE, MARYLAND C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Okandan, M (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU JOURNAL REHAB RES & DEV PI BALTIMORE PA DEPT OF VETERANS AFFAIRS REHABIL RES & DEVELOP CTR 103 SOUTH GAY STREET, BALTIMORE, MD 21202-4051 USA SN 0748-7711 J9 J REHABIL RES DEV JI J. Rehabil. Res. Dev. PD MAY-JUN PY 2002 VL 39 IS 3 SU S BP 3 EP 4 PG 2 WC Rehabilitation SC Rehabilitation GA 577AP UT WOS:000177039600004 ER PT J AU Currie, LA Benner, BA Kessler, JD Klinedinst, DB Klouda, GA Marolf, JV Slater, JF Wise, SA Cachier, H Cary, R Chow, JC Watson, J Druffel, ERM Masiello, CA Eglinton, TI Pearson, A Reddy, CM Gustafsson, O Quinn, JG Hartmann, PC Hedges, JI Prentice, KM Kirchstetter, TW Novakov, T Puxbaum, H Schmid, H AF Currie, LA Benner, BA Kessler, JD Klinedinst, DB Klouda, GA Marolf, JV Slater, JF Wise, SA Cachier, H Cary, R Chow, JC Watson, J Druffel, ERM Masiello, CA Eglinton, TI Pearson, A Reddy, CM Gustafsson, O Quinn, JG Hartmann, PC Hedges, JI Prentice, KM Kirchstetter, TW Novakov, T Puxbaum, H Schmid, H TI A critical evaluation of interlaboratory data on total, elemental, and isotopic carbon in the carbonaceous particle reference material, NIST SRM 1649a SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article DE C-14 speciation; elemental carbon; fossil and biomass carbon; international intercomparison; SRM 1649a; total carbon certified value ID POLYCYCLIC AROMATIC-HYDROCARBONS; BLACK CARBON; RADIOCARBON; SEDIMENTS; AEROSOLS; ATTENUATION; PHASE; AMS AB Because of increased interest in the marine and atmospheric sciences in elemental carbon (EC), or black carbon (BC) or soot carbon (SC), and because of the difficulties in analyzing or even defining this pervasive component of particulate carbon, it has become quite important to have appropriate reference materials for intercomparison and quality control. The NIST "urban dust" Standard Reference Material(R) SRM 1649a is useful in this respect, in part because it comprises a considerable array of inorganic and organic species, and because it exhibits a large degree of (C-14) isotopic heterogeneity, with biomass carbon source contributions ranging from about 2 % (essentially fossil aliphatic fraction) to about 32 % (polar fraction). A primary purpose of this report is to provide documentation for the new isotopic and chemical particulate carbon data for the most recent (31 Jan. 2001) SRM 1649a Certificate of Analysis. Supporting this is a critical review of underlying international intercomparison data and methodologies, provided by 18 teams of analytical experts from 11 institutions. Key results of the intercomparison are: (1) a new, Certified Value for total carbon (TC) in SRM 1649a; (2) C-14 Reference Values for total carbon and a number of organic species, including for the first time 8 individual PAHs; and (3) elemental carbon (EC) Information Values derived from 13 analytical methods applied to this component. Results for elemental carbon, which comprised a special focus of the intercomparison, were quite diverse, reflecting the confounding of methodological-matrix artifacts, and methods that tended to probe more or less refractory regions of this universal, but ill-defined product of incomplete combustion. Availability of both chemical and C-14 speciation data for SRM 1649a holds great promise for improved analytical insight through comparative analysis (e. g., fossil/biomass partition in EC compared to PAH), and through application of the principle of isotopic mass balance. C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Ctr Sci Climat & Environm, F-91198 Gif Sur Yvette, France. Sunset Labs Inc, Forest Grove, OR 97116 USA. Desert Res Inst, Energy & Environm Engn Ctr, Reno, NV 89512 USA. Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA. Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. Stockholm Univ, Inst Appl Environm Res, S-10691 Stockholm, Sweden. Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USA. Univ Washington, Sch Oceanog, Seattle, WA 98195 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Vienna Univ Technol, Inst Analyt Chem, A-1060 Vienna, Austria. RP Currie, LA (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. EM lloyd.currie@nist.gov; bruce.benner@nist.gov; donna.klinedinst@nist.gov; george.klouda@nist.gov; george.klouda@nist.gov; stephen.wise@nist.gov RI Pearson, Ann/A-6723-2009; Masiello, Caroline/A-2653-2011; Watson, John/E-6869-2010 OI Masiello, Caroline/0000-0003-2102-6229; Watson, John/0000-0002-1752-6899 NR 59 TC 127 Z9 131 U1 5 U2 43 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPERINTENDENT DOCUMENTS,, WASHINGTON, DC 20402-9325 USA SN 1044-677X J9 J RES NATL INST STAN JI J. Res. Natl. Inst. Stand. Technol. PD MAY-JUN PY 2002 VL 107 IS 3 BP 279 EP 298 DI 10.6028/jres.107.022 PG 20 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 568ZP UT WOS:000176575100004 PM 27446731 ER PT J AU Frischknecht, AL Milner, ST AF Frischknecht, AL Milner, ST TI Linear rheology of binary melts from a phenomenological tube model of entangled polymers SO JOURNAL OF RHEOLOGY LA English DT Article ID MOLECULAR-WEIGHT DISTRIBUTION; VISCOELASTIC PROPERTIES; POLYDISPERSITY; VISCOSITY; REPTATION AB We develop a simple phenomenological theory to describe linear viscoelasticity in bidisperse linear polymer melts. We describe the single-chain relaxation spectrum using a local description of relaxation times along the chain, which includes contour-length fluctuations as well as reptative motion. The complex modulus is calculated by summing the contributions from all the segments along the chain, and weighting the contributions by the entangled volume fraction remaining at each time. We find that the resulting predictions for the modulus fit data of binary blends of polybutadiene better than those of the widely used double reptation model. (C) 2002 The Society of Rheology. C1 Exxon Res & Engn Co, Annandale, NJ 08801 USA. RP Frischknecht, AL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RI Frischknecht, Amalie/N-1020-2014 OI Frischknecht, Amalie/0000-0003-2112-2587 NR 23 TC 8 Z9 8 U1 1 U2 5 PU JOURNAL OF RHEOLOGY AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0148-6055 J9 J RHEOL JI J. Rheol. PD MAY-JUN PY 2002 VL 46 IS 3 BP 671 EP 684 DI 10.1122/1.1459445 PG 14 WC Mechanics SC Mechanics GA 549FC UT WOS:000175433000006 ER PT J AU Lorenz, JC Nadon, GC AF Lorenz, JC Nadon, GC TI Braided-river deposits in a muddy depositional setting: The Molina Member of the Wasatch Formation (Paleogene), west-central Colorado, USA SO JOURNAL OF SEDIMENTARY RESEARCH LA English DT Article ID CENTRAL NEW-MEXICO; RIO-GRANDE RIFT; PALEOSOLS; CRITERIA AB The Molina Member is a Paleogene, sand-rich interval, up to 125 meters thick, found within the otherwise mud-dominated, nonmarine Wasatch Formation of west-central Colorado. Sandstone beds of the Molina Member form sheet-like units interbedded with subordinate volumes of mudstone. The sandstones contain a low-diversity assemblage of sedimentary structures that is commonly dominated by horizontal, planar laminae, and bedding is locally contorted by large-scale soft-sediment deformation. A braided fluvial model best explains the characteristics of these strata, yet the existing braided-river models do not fully account for the assemblage of sedimentary structures or the relatively high volumes (up to half of the section) of interbedded mudstones. Two modern braided rivers, Medano Creek (Colorado) and the Prairie Dog Town Fork of the Red River (Texas), have rapid, shallow flows that form horizontal, planar bedding. In both systems the presence of large volumes of easily mobilized sandy sediment, a flashy discharge regime, and a lack of reworking between flood stages lead to the development of high-energy, shallow-water bedforms; and the preservation of the resulting high-energy sedimentary structures. Similar conditions and processes are suggested to have controlled deposition of the sand-dominated Molina Member, which is a depositional anomaly within the otherwise muddy Wasatch Formation. Short-term availability of readily eroded, second-cycle sandstones from a newly elevated source area to the southeast is the most likely reason for the abrupt change from a mud-dominated fluvial system to the sandy Molina system. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Ohio Univ, Dept Geol Sci, Athens, OH 45701 USA. RP Lorenz, JC (reprint author), Sandia Natl Labs, MS 0750, Albuquerque, NM 87185 USA. NR 39 TC 12 Z9 14 U1 0 U2 5 PU SEPM-SOC SEDIMENTARY GEOLOGY PI TULSA PA 6128 EAST 38TH ST, STE 308, TULSA, OK 74135-5814 USA SN 1527-1404 J9 J SEDIMENT RES JI J. Sediment. Res. PD MAY PY 2002 VL 72 IS 3 BP 376 EP 385 DI 10.1306/100801720376 PG 10 WC Geology SC Geology GA 579BK UT WOS:000177155400006 ER PT J AU Schoenberg, M AF Schoenberg, M TI Time-dependent anisotropy induced by pore pressure variation in fractured rock SO JOURNAL OF SEISMIC EXPLORATION LA English DT Article DE fractures; grain boundaries; compliant surfaces; anisotropy; pore pressure; stress ID ELASTIC-WAVES AB Fracture surfaces, grain boundaries, microcracks and joint faces are much more sensitive to stress than the intact rock. Based on this assertion, fractured rock properties are analyzed based on fracture compliance and fracture anisotropy changing as the traction on the fractures due to pore pressure changes, while properties of the intact background rock are assumed constant. This approach constrains how the physical properties can change based on the distribution of fracturing as a function of orientation. In particular, the 'shape of the elastic wave anisotropy' (shape of elastodynamic slowness surface) and the shape of the permeability ellipsoid must change in specific ways due to increasing or decreasing pore pressure. Improvement is needed in our understanding of the relation between effective stress and fracture, as well as refinement of techniques of deter-mining in situ elastodynamic rock anisotropy in 3D for such methods to be utilized in the tracking of pore pressure changes in space and time due to the pumping in or extraction of fluids from fractured reservoirs. C1 Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Schoenberg, M (reprint author), Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 9 TC 16 Z9 16 U1 0 U2 5 PU GEOPHYSICAL PRESS PI CASTELNAU-LE-LEZ PA 14 RUE DU PRADO, 34170 CASTELNAU-LE-LEZ, FRANCE SN 0963-0651 J9 J SEISM EXPLOR JI J. Seism Explor. PD MAY PY 2002 VL 11 IS 1-2 SI SI BP 83 EP 105 PG 23 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 566BP UT WOS:000176407200006 ER PT J AU Romero, M Buck, R Pacheco, JE AF Romero, M Buck, R Pacheco, JE TI An update on solar central receiver systems, projects, and technologies SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID HELIOSTAT FIELD; POWER-PLANT; TOWER; OPTIMIZATION AB Central Receiver Systems that use large heliostat fields and solar receivers located on top of a tower are now in the position to deploy the first generation of grid-connected commercial plants. The technical feasibility of the CRS power plants technology can be valued as sufficiently mature after the pioneering experience at the early 1980s of several pilot plants in the 0.5-10 MW power range and the subsequent improvement of key components like heliostats and solar receiver in many projects merging international collaboration during the past 15 years. Solar-only plants like Solar Tres and PS10 or hybrid schemes like SOLGAS, CONSOLAR, or SOLGATE are being developed and supply a portfolio of alternatives leading to the first scaling-up plants during the period 2000-2010. Those projects with still non-optimized small sizes of 10-15 MW are already revealing a dramatic reduction of costs versus previous feasibility studies and give the path for the formulation of a realistic milestone of achieving a LEC of $0.08/kWh by the year 2010 and penetrating initial competitive markets by 2015 with LECs between $0.04/kWh-$0.06/kWh. C1 Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain. Deutsch Zentrum Luft & Raumfahrt, Inst Tech Thermodynam, D-70569 Stuttgart, Germany. Sandia Natl Labs, Solar Thermal Technol Dept, Albuquerque, NM 87185 USA. RP Romero, M (reprint author), Ctr Invest Energet Medioambientales & Tecnol, Ave Complutense 22, E-28040 Madrid, Spain. EM romero@ciemat.es; reiner.buck@dlr.de; jepache@sandia.gov NR 44 TC 149 Z9 154 U1 4 U2 30 PU ASME PI NEW YORK PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA SN 0199-6231 EI 1528-8986 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD MAY PY 2002 VL 124 IS 2 BP 98 EP 108 DI 10.1115/1.1467921 PG 11 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 557BQ UT WOS:000175887800002 ER PT J AU Price, H Lupfert, E Kearney, D Zarza, E Cohen, G Gee, R Mahoney, R AF Price, H Lupfert, E Kearney, D Zarza, E Cohen, G Gee, R Mahoney, R TI Advances in parabolic trough solar power technology SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID COATINGS AB Parabolic trough solar technology is the most proven and lowest cost large-scale solar power technology available today, primarily because of the nine large commercial-scale solar power plants that are operating in the California Mojave Desert. These plants, developed by Luz International Limited and referred to as Solar Electric Generating Systems (SEGS), range in size from 14-80 MW and represent 354 MW of installed electric generating capacity. More than 2,000,000 m(2) of parabolic trough collector technology has been operating daily for up to 18 years, and as the year 2001 ended, these plants had accumulated 127 years of operational experience. The Luz collector technology has demonstrated its ability to operate in a commercial power plant environment like no other solar technology in the world. Although no new plants have been built since 1990, significant advancements in collector and plant design have been made possible by the efforts of the SEGS plants operators, the parabolic trough industry, and solar research laboratories around the world. This paper reviews the current state of the art of parabolic trough solar power technology and describes the R&D efforts that are in progress to enhance this technology. The paper also shows how the economics of future parabolic trough solar power plants are expected to improve. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. DLR Plataforma Solar Almeria, E-04200 Tabernas, Almeria, Spain. Kearney & Assoc, Vashon, WA 98070 USA. CIEMAT PSa, E-04200 Tabernas, Almeria, Spain. Duke Solar, Raleigh, NC 27604 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Price, H (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 46 TC 323 Z9 356 U1 8 U2 67 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD MAY PY 2002 VL 124 IS 2 BP 109 EP 125 DI 10.1115/1.1467922 PG 17 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 557BQ UT WOS:000175887800003 ER PT J AU Pacheco, JE Showalter, SK Kolb, WJ AF Pacheco, JE Showalter, SK Kolb, WJ TI Development of a molten-salt thermocline thermal storage system for parabolic trough plants SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Thermal storage improves the dispatchability and marketability of parabolic trough power plants allowing them to produce electricity on demand independent of solar collection. One such thermal storage system, a thermocline, uses a single tank containing a fluid with a thermal gradient running vertically through the tank, where hotter fluid (lower density) is at the top of the tank and colder fluid is at the base of the tank. The thermal gradient separates the two temperature potentials. A low-cost filler material provides the bulk of the thermal capacitance of the thermal storage, prevents convective mixing, and reduces the amount of fluid required. In this paper; development of a thermocline system that uses molten-nitrate salt as the heat transfer fluid is described and compared to a two-tank molten salt system. Results of isothermal and thermal cycling tests on candidate materials and salt safety tests are presented as well as results from a small pilot-scale (2.3 MWh) thermocline. C1 Sandia Natl Labs, Solar Thermal Technol Dept, Albuquerque, NM 87185 USA. RP Pacheco, JE (reprint author), Sandia Natl Labs, Solar Thermal Technol Dept, POB 5800, Albuquerque, NM 87185 USA. NR 10 TC 189 Z9 197 U1 8 U2 49 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD MAY PY 2002 VL 124 IS 2 BP 153 EP 159 DI 10.1115/1.1464123 PG 7 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 557BQ UT WOS:000175887800008 ER PT J AU Barth, DL Pacheco, JE Kolb, WJ Rush, EE AF Barth, DL Pacheco, JE Kolb, WJ Rush, EE TI Development of a high-temperature long-shafted, molten-salt pump for power tower applications SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB A new hot-salt pump has been developed for molten-salt solar power tower applications that will reduce the capital cost of the plant, eliminate many of the piping, valve and sump problems associated with the handling of molten salt, and improve the reliability of a critical part of the operating system of the plant. Previous systems required that the pumps in these plants be housed in shallow sunips that ivere gravity fed by the storage tanks. This new pump arrangement will eliminate the sump level-control valves and the potential for overflowing the pump sump vessels. Until now, only cantilever pumps were qualified for hot molten-salt service because no suitable bearing materials had been, tested. This paper describes the successful qualification of a long-shafted pump with salt-lubricated bearings tested for over 5000 hours with nitrate salt at 565degreesC. C1 Nagle Pumps Inc, Chicago Hts, IL 60411 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Barth, DL (reprint author), Nagle Pumps Inc, 1249 Ctr Ave, Chicago Hts, IL 60411 USA. NR 6 TC 12 Z9 12 U1 0 U2 10 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD MAY PY 2002 VL 124 IS 2 BP 170 EP 175 DI 10.1115/1.1464126 PG 6 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 557BQ UT WOS:000175887800011 ER PT J AU Neumann, A Witzke, A Jones, SA Schmitt, G AF Neumann, A Witzke, A Jones, SA Schmitt, G TI Representative terrestrial solar brightness profiles SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID SUNSHAPE AB Solar thermal energy systems often use optical imaging concentrators. The image size and shape produced in the focal plane of the concentrator system depends oil the solar brightness distribution. Therefore, the forward scattering of solar radiation by the Earth's atmosphere modifies the solar brightness distribution and creates a circumsolar aureole. The circumsolar ratio, the energy contained in the solar aureole compared to total energy, can impact the performance of these concentrating systems. Based on about 2300 sun-shape measurements from sites in France, Germany, and Spain made with a camera system developed by the German Aerospace Center (DLR), average solar brightness profiles with a circumsolar ratio of about 0%, 5%, 10%, 20%, 30%, and 40% were generated. These profiles are compared to the measurements taken by the Lawrence Berkeley Laboratory (LBL) in the late 1970s and a commonly used limb-darkened solar business profile, as known front astronomy. A statistical analysis gives information on the frequency of occurrence of each of the average profiles. The profiles combined with the statistical weight should offer a numerical database for calculating the influence of variable conditions of the sunlight scattering oil solar concentrating systems. Furthermore, a single average profile was calculated from the DLR data. C1 German Aerosp Ctr DLR, Cologne, Germany. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. RP Neumann, A (reprint author), German Aerosp Ctr DLR, Cologne, Germany. NR 24 TC 71 Z9 74 U1 1 U2 10 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD MAY PY 2002 VL 124 IS 2 BP 198 EP 204 DI 10.1151/1.1464880 PG 7 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 557BQ UT WOS:000175887800015 ER PT J AU Khalifah, P Ho, DM Huang, Q Cava, RJ AF Khalifah, P Ho, DM Huang, Q Cava, RJ TI The structure and properties of beta-La3RuO7: A new structure type with isolated RuO6 octahedra SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article ID CRYSTAL-STRUCTURE; LA3RUO7 AB second lanthanum ruthenium oxide with the formula La3RuO7 is reported. This compound, beta-La3RuO7, crystallizes in the P2(1)/c space group with a unit cell of a=8.8388(3)A, b = 5.6960(1) Angstrom, c = 12.5830(3) Angstrom, and beta = 104.729(1)degrees, as refined from powder neutron diffraction data. The two major structural motifs in this structure are isolated RuO6 octahedra and edge-sharing chains of OLa4 tetrahedra. Magnetic susceptibility measurements show this compound to have a magnetic moment of mu(eff) = 3.92 mu(B) and a Weiss constant of theta = -70 K. (C) 2002 Elsevier Science (USA). C1 Princeton Univ, Dept Chem, Princeton, NJ 08544 USA. Princeton Univ, Princeton Mat Inst, Princeton, NJ 08540 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA. RP Khalifah, P (reprint author), Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA. NR 11 TC 9 Z9 9 U1 3 U2 17 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0022-4596 J9 J SOLID STATE CHEM JI J. Solid State Chem. PD MAY PY 2002 VL 165 IS 2 BP 359 EP 362 DI 10.1006/jssc.2002.9551 PG 4 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA 557PB UT WOS:000175916000019 ER PT J AU Rai, D Hess, NJ Rao, LF Zhang, ZC Felmy, AR Moore, DA Clark, SB Lumetta, GJ AF Rai, D Hess, NJ Rao, LF Zhang, ZC Felmy, AR Moore, DA Clark, SB Lumetta, GJ TI Thermodynamic model for the solubility of Cr(OH)(3)(am) in concentrated NaOH and NaOH-NaNO3 solutions SO JOURNAL OF SOLUTION CHEMISTRY LA English DT Article DE thermodynamics; Cr(OH)(3)(am); solubility; hydrolysis constants; polynuclear species; Cr2O2(OH)(2)(4); Cr(OH)(4); ion-interaction parameters ID HYDROLYTIC POLYMERIZATION; AQUEOUS-SOLUTION; CHROMIUM(III); CONSTANTS; OXIDES; EQUILIBRIA; HYDROXIDE; IONS AB The main objective of this study was to develop a thermodynamic model for predicting Cr(III) behavior in concentrated NaOH and in mixed NaOH-NaNO3 solutions for application to developing effective caustic leaching strategies for high-level nuclear waste sludges. To meet this objective, the solubility of Cr(OH)(3)(am) was measured in 0.003 to 10.5 m NaOH, 3.0 m NaOH with NaNO3 varying from 0.1 to 7.5 m, and 4.6 m NaNO3 with NaOH varying from 0.1 to 3.5 m at room temperature (22 +/- 2degreesC). A combination of techniques, X-ray absorption spectroscopy (XAS) and absorptive stripping voltammetry analyses, were used to determine the oxidation state and nature of aqueous Cr. A thermodynamic model, based on the Pitzer equations, was developed from the solubility measurements to account for dramatic increases in aqueous Cr with increases in NaOH concentration. The model includes only two aqueous Cr species, Cr(OH)(4)(-) and Cr2O2(OH)(4)(-) (although the possible presence of a small percentage of higher oligomers at >5.0 m NaOH cannot be discounted) and their ion-interaction parameters with Na+. The logarithms of the equilibrium constants for the reactions involving Cr(OH)(4)(-) [Cr(OH)(3)(am) + OH- reversible arrow Cr(OH)(4)(-)] and Cr2O2(OH)(4)(2)- [2Cr(OH)(3)(am) + 2OH(-) reversible arrow Cr2O2(OH)(4)(2)- + 2H(2)O] were determined to be -4.36 +/- 0.24 and -5.24 +/- 0.24, respectively. This model was further tested and provided close agreement between the observed Cr concentrations in equilibrium with Cr(OH)(3)(am) in mixed NaOH-NaNO3 solutions and with high-level tank sludges leached with and primarily containing NaOH as the major electrolyte. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Washington State Univ, Pullman, WA 99164 USA. RP Rai, D (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. RI Zhang, Zhicheng/B-3887-2010; OI Hess, Nancy/0000-0002-8930-9500 NR 40 TC 17 Z9 17 U1 4 U2 18 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0095-9782 J9 J SOLUTION CHEM JI J. Solut. Chem. PD MAY PY 2002 VL 31 IS 5 BP 343 EP 367 AR UNSP pp529-josl-375131 DI 10.1023/A:1015887414411 PG 25 WC Chemistry, Physical SC Chemistry GA 562GZ UT WOS:000176190200001 ER PT J AU Polzin, KA Choueiri, EY Gurfil, P Kasdin, NJ AF Polzin, KA Choueiri, EY Gurfil, P Kasdin, NJ TI Plasma propulsion options for multiple terrestrial planet finder architectures SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article ID ELECTRIC PROPULSION; DYNAMICS; THRUSTER AB A systems-level trade study is presented comparing the propulsion requirements and associated final masses for different architectural implementations of the Terrestrial Planet Finder mission. The study focuses on the millinewton-level propulsion chores associated with rotating and repointing an array. Three interferometer configurations, free flying, monolithic, and tethered, lead to estimates of thrust and power requirements and spacecraft masses associated with the different plasma propulsion systems required to perform maneuvers throughout a mission. The parametric study includes the following plasma propulsion options: Hall thruster, field emission electric propulsion, ablative pulsed plasma thruster, ablative Z-pinch pulsed plasma thruster, and gas-fed pulsed plasma thruster. Not all of the thrusters considered can perform the necessary propulsive chores for each architecture, but for the most promising thruster and architecture combinations, it is found that the initial mass for a system falls between 3050 and 4060 kg. The tether, in general, possesses the lowest initial mass of the three architectures followed by the free flyer and the monolith. Finally, the thrust-to-power ratio, maximum deliverable thrust or impulse bit, and capability of a propulsion system to process enough power to produce a required thrust level are shown to be more important factors than the specific impulse in determining the proper thruster choice for moderate to high thrust maneuvers. C1 Princeton Univ, Elect Prop & Plasma Dynam Lab, Princeton, NJ 08544 USA. Princeton Univ, Appl Phys Grp, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA. Princeton Univ, Dynam & Control Grp, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA. RI Gurfil, Pini/J-2310-2012 NR 44 TC 10 Z9 10 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 USA SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD MAY-JUN PY 2002 VL 39 IS 3 BP 347 EP 356 DI 10.2514/2.3833 PG 10 WC Engineering, Aerospace SC Engineering GA 560HZ UT WOS:000176077800002 ER PT J AU Wong, KL Baker, AJ AF Wong, KL Baker, AJ TI A modular collaborative parallel CFD workbench SO JOURNAL OF SUPERCOMPUTING LA English DT Article DE computational fluid dynamics; finite element method; parallel problem solving environment; sparse iterative solvers; grid computing AB Simulation of physical phenomena on computers has joined engineering mechanics theory and laboratory experimentation as the third method of engineering analysis design. It is in fact the only feasible method for analyzing many critically important phenomena, e.g., quenching, heat treating, full scale phenomena, etc. With the rapid maturation of inexpensive parallel computing technology, and high performance communications, there will emerge shortly a totally new, highly interactive computing/simulation environment supporting engineering design optimization. This environment will exist on the Internet employing interoperable software/hardware infrastructures emergent today. A key element of this will involve development of computational software enabling utilization of all HPCC advances. This paper introduces the concept and details the development of a user-adapted computational simulation software platform prototype on the Internet. C1 Univ Tennessee, Oak Ridge Natl Lab, Joint Inst Computat Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mech & Aerosp Engn & Engn Sci, Knoxville, TN 37996 USA. RP Wong, KL (reprint author), Univ Tennessee, Oak Ridge Natl Lab, Joint Inst Computat Sci, Bldg 3546,RM 105,Mail Stop 6013,Bethel Valley Rd,, Oak Ridge, TN 37831 USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0920-8542 J9 J SUPERCOMPUT JI J. Supercomput. PD MAY PY 2002 VL 22 IS 1 BP 45 EP 53 DI 10.1023/A:1014354403796 PG 9 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA 525LT UT WOS:000174072800004 ER PT J AU Chan, JW Huser, T Hayden, JS Risbud, SH Krol, DM AF Chan, JW Huser, T Hayden, JS Risbud, SH Krol, DM TI Fluorescence spectroscopy of color centers generated in phosphate glasses after exposure to femtosecond laser pulses SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article; Proceedings Paper CT Fall Meeting of the Glass and Optical Materials Division of the American-Ceramic-Society CY OCT 01-04, 2000 CL CORNING, NEW YORK SP Amer Ceram Soc, Glass & Opt Mat Div ID FIBER BRAGG GRATINGS; WRITING WAVE-GUIDES; DEFECT CENTERS; SILICA; IRRADIATION; WRITTEN AB A confocal fluorescence microscopy setup was used to observe, in situ, spectral changes in phosphate glasses which were modified using 0.3 muJ of tightly focused 800 nm, 130 fs laser pulses. On 488 mn excitation, the modified glass shows a broad fluorescence centered at roughly 600 mn, which decays with prolonged exposure to the 488 mu light. The decay behavior is dependent on the 488 nm power, with a faster decay rate for higher powers. A mechanism whereby color centers, formed by the femtosecond pulses, fluoresce when excited by the 488 nm light and are simultaneously photobleached is proposed to explain the observed behavior. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. Univ Calif Davis, Dept Appl Sci, Livermore, CA USA. Schott Glass Technol Inc, Duryea, PA 18642 USA. RP Chan, JW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RI Huser, Thomas/H-1195-2012; Chan, James/J-3829-2014 OI Huser, Thomas/0000-0003-2348-7416; NR 25 TC 20 Z9 20 U1 0 U2 7 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43086-6136 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2002 VL 85 IS 5 BP 1037 EP 1040 PG 4 WC Materials Science, Ceramics SC Materials Science GA 555HJ UT WOS:000175788400003 ER PT J AU Ehrmann, PR Campbell, JH AF Ehrmann, PR Campbell, JH TI Nonradiative energy losses and radiation trapping in neodymium-doped phosphate laser glasses SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article; Proceedings Paper CT Fall Meeting of the Glass and Optical Materials Division of the American-Ceramic-Society CY OCT 01-04, 2000 CL CORNING, NEW YORK SP Amer Ceram Soc, Glass & Opt Mat Div ID SPECTRAL PROPERTIES; PERFORMANCE; ABSORPTION; RELAXATION; SYSTEM; IONS AB Fluorescence radiation trapping and nonradiative energy losses from the Nd3+ F-4(3/2) state are reported for two widely used commercial phosphate laser glasses (LHG-8 and LG-770). The effects of hydroxyl-group, transition-metal (Cu, Fe, V, Co, Ni, Cr, Mn, and Pt), and rare-earth (Dy, Pr, Sm, and Ce) impurities on the F-4(3/2) nonradiative decay rate in these glasses are quantified. Nd concentration quenching effects are reported for doping levels ranging from about 0.5 x 10(20) to 8.0 x 10(20) ions/cm(3). The results are analyzed using the Forster-Dexter theory for dipolar energy transfer. Quenching rates for transition-metal ions correlate with the magnitude of spectral overlap for Nd emission (donor) and the metal ion absorption (acceptor). The nonradiative decay rates due to hydroxyl groups follow Forster-Dexter theory except at low Nd-doping levels (less than or similar to2 x 10(20) ions/cm(3)) where the quenching rate becomes independent of the Nd concentration. The data suggest a possible correlation of OH sites with Nd ions in this doping region. The effects of radiation trapping on the fluorescence decay are reported as a function of sample size, shape, and doping level. The results agree well with the theory except for samples with small doping-length products; in these cases, multiple internal reflections from the sample surfaces enhance the trapping effect. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Campbell, JH (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 38 TC 73 Z9 78 U1 5 U2 22 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43086-6136 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2002 VL 85 IS 5 BP 1061 EP 1069 PG 9 WC Materials Science, Ceramics SC Materials Science GA 555HJ UT WOS:000175788400007 ER PT J AU Karabulut, M Marasinghe, GK Click, CA Metwalli, E Brow, RK Booth, CH Bucher, JJ Shuh, DK Suratwala, TI Campbell, JH AF Karabulut, M Marasinghe, GK Click, CA Metwalli, E Brow, RK Booth, CH Bucher, JJ Shuh, DK Suratwala, TI Campbell, JH TI XAFS investigation of platinum impurities in phosphate glasses SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article; Proceedings Paper CT Fall Meeting of the Glass and Optical Materials Division of the American-Ceramic-Society CY OCT 01-04, 2000 CL CORNING, NEW YORK SP Amer Ceram Soc, Glass & Opt Mat Div ID RAY-ABSORPTION-SPECTRA; LASER GLASSES; DISSOLUTION AB The coordination environments of Pt impurities in a ternary K-aluminophosphate (KAP) glass and commercial K, Mg-aluminophosphate (KMAP) laser glasses have been investigated by Pt L-III-edge X-ray absorption fine structure (XAFS) spectroscopy. Pt valence in the KAP glass depends on the melt preparation atmosphere. Pt4+ ions form in melts that are bubbled with oxygen, whereas metallic Pt particles form when these same samples are remelted in air. Residual chlorine in KMAP glasses has an effect on Pt bonding. In chlorine-free samples, Pt4+ ions are coordinated with similar to5.4 (8) oxygen atoms with an average distance of 2.02 (1) Angstrom. For glasses with low chlorine contents (<200 ppm Cl), the pt(4+) ions have both O and Cl atoms in the first coordination shell. As the Cl concentration increases, the number of 0 nearest neighbors decreases and for Cl:Pt > 5, only Cl nearest neighbors are observed. pt(4+) ions in these latter glasses are coordinated by similar to5.5 (8) Cl atoms at an average distance of 2.27 (2) Angstrom. C1 Univ Missouri, Grad Ctr Mat Res, Rolla, MO 65401 USA. Lawrence Berkeley Natl Lab, Chem Sci Div, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Karabulut, M (reprint author), Univ Missouri, Grad Ctr Mat Res, Rolla, MO 65401 USA. RI Suratwala, Tayyab/A-9952-2013; Booth, Corwin/A-7877-2008 OI Suratwala, Tayyab/0000-0001-9086-1039; NR 24 TC 13 Z9 13 U1 3 U2 15 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43086-6136 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2002 VL 85 IS 5 BP 1093 EP 1099 PG 7 WC Materials Science, Ceramics SC Materials Science GA 555HJ UT WOS:000175788400012 ER PT J AU Xu, HW Navrotsky, A Balmer, ML Su, YL AF Xu, HW Navrotsky, A Balmer, ML Su, YL TI Crystal chemistry and phase transitions in substituted pollucites along the CsAlSi2O6-CsTiSi2O6.5 join: A powder synchrotron X-ray diffractometry study SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID RIETVELD REFINEMENT; THERMAL-EXPANSION; DIFFRACTION DATA; HIGH-TEMPERATURE; LEUCITE; CESIUM; CSTISI2O6.5; SILICATE; NEUTRON AB The crystal structures for a suite of substituted pollucites with the compositions CsTixAl1-xSi2O6+0.5x, 0 less than or equal to x less than or equal to 1, have been determined from Rietveld analysis of powder synchrotron XRD data. Our results indicate that the pollucite end member (CsAlSi2O6) has a tetragonal structure (space group 14(1)/a), whereas all other compositions are cubic (space group Ia3d). The increased symmetry for the titanium-substituted structures is presumably due to the incorporation of additional O2- anions (needed for compensating the charge imbalance between Ti4+ and Al3+), which effectively holds open the expanded cubic framework. In situ cooling experiments of the substituted phase CsTi0.1Al0.9Si2O6.05 reveal a displacive transformation to the tetragonal structure at similar to230 K. This transformation is tricritical in nature and is analogous to the tetragonal-to-cubic transition in pollucite on heating. C1 Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Xu, HW (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. NR 40 TC 15 Z9 15 U1 1 U2 4 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43086-6136 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2002 VL 85 IS 5 BP 1235 EP 1242 PG 8 WC Materials Science, Ceramics SC Materials Science GA 555HJ UT WOS:000175788400035 ER PT J AU Hranisavljevic, J Dimitrijevic, NM Wurtz, GA Wiederrecht, GP AF Hranisavljevic, J Dimitrijevic, NM Wurtz, GA Wiederrecht, GP TI Photoinduced charge separation reactions of J-aggregates coated on silver nanoparticles SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID COLLOIDAL SILVER; EXCITON DYNAMICS; CYANINE DYE; SPECTROSCOPY; PARTICLES; MICROSCOPY; EXCITATION C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Wiederrecht, GP (reprint author), Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 24 TC 93 Z9 96 U1 5 U2 23 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 1 PY 2002 VL 124 IS 17 BP 4536 EP 4537 DI 10.1021/ja012263e PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 545PZ UT WOS:000175227600001 PM 11971681 ER PT J AU Huynh, MHV Baker, RT Jameson, DL Labouriau, A Meyer, TJ AF Huynh, MHV Baker, RT Jameson, DL Labouriau, A Meyer, TJ TI Formation and reactivity of the Os(IV)-azidoimido complex, PPN[Os-IV(bpy)(Cl)(3)(N-4)] SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID NITROGEN ATOM-TRANSFER; PHOSPHORANIMINATO COMPLEXES; ELECTRON-TRANSFER; OSMIUM NITRIDE; OXIDATION; N-15 C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. NR 29 TC 24 Z9 24 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 1 PY 2002 VL 124 IS 17 BP 4580 EP 4582 DI 10.1021/ja0122086 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA 545PZ UT WOS:000175227600023 PM 11971703 ER PT J AU Kemball-Cook, S Wang, B Fu, XH AF Kemball-Cook, S Wang, B Fu, XH TI Simulation of the intraseasonal oscillation in the ECHAM-4 model: The impact of coupling with an ocean model SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID SEA-SURFACE TEMPERATURE; TROPICAL WESTERN PACIFIC; MADDEN-JULIAN OSCILLATION; FREQUENCY EQUATORIAL WAVES; SHEARED ZONAL FLOW; CONVECTION ANOMALIES; TOGA COARE; WARM POOL; VARIABILITY; SCALE AB Three 15-yr integrations were made with the ECHAM-4 atmospheric GCM (AGCM); in the first integration, the model lower boundary conditions were the observed monthly mean sea surface temperatures, and, in the second, the AGCM was coupled to the University of Hawaii 2.5-layer intermediate ocean model. In the third simulation, the SST climatology generated in the coupled run was used to create monthly mean SSTs, which were then used to drive the AGCM in an uncoupled configuration similar to the first run. The simulation of the intraseasonal oscillation (ISO) in these three runs was compared with data from the NCEP reanalysis and outgoing longwave radiation from NOAA polar-orbiting satellites, with particular emphasis on the boreal summer ISO. The overall effect of coupling the AGCM to the ocean model is to improve the intraseasonal variability of the model. Upon coupling, the simulated boreal winter ISO becomes more spatially coherent and has a more realistic phase speed. In the May-June Asian monsoon season, the coupled run shows pronounced northward propagation of convection and circulation anomalies over the Indian Ocean, as in the observations, while northward propagation is absent in the uncoupled run. These improvements in the simulated ISO occur despite the fact that the coupled-run SST climatology has a substantial cold bias in both the Indian Ocean and the western Pacific warm pool. The improvement in the model ISO may be attributed to air-sea interaction whose mechanism is increased low-level convergence into the positive SST anomaly ahead of the convection anomaly. The simulation of the August-October ISO is degraded upon coupling, however. The coupled-run basic state fails to produce the region of easterly vertical shear of the mean zonal wind, which lies on the equator during August-October. This region of easterly shear is critical for the emission of Rossby waves by equatorial convection associated with the ISO. In the absence of easterly shear, the observed northwestward propagation of convection is inhibited in both runs made using the coupled model basic state. The uncoupled AGCM run correctly locates the region of easterly shear and produces an August-October ISO that agrees well with observations. C1 Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Dept Meteorol, Honolulu, HI 96822 USA. Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA. RP Kemball-Cook, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Mail Stop 90-1116,1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 52 TC 104 Z9 108 U1 0 U2 4 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD MAY PY 2002 VL 59 IS 9 BP 1433 EP 1453 DI 10.1175/1520-0469(2002)059<1433:SOTIOI>2.0.CO;2 PG 21 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 542YQ UT WOS:000175073700001 ER PT J AU Tucker, MC Reimer, JA Cairns, EJ AF Tucker, MC Reimer, JA Cairns, EJ TI A Li-7 NMR study of capacity fade in metal-substituted lithium manganese oxide spinels SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID 4 V; ELEVATED-TEMPERATURE; LI/LIMN2O4 CELLS; PHASE-DIAGRAM; LIMN2O4; INSERTION; CATHODE; ELECTRODES; LIXMN2O4 AB Nuclear magnetic resonance (NMR) spectroscopy and electrochemical techniques have been used to determine dominant failure modes of LiMn2O4-based positive electrode materials for lithium rechargeable batteries, and to elucidate the role of metal-formanganese substitution in the stabilization of the material toward electrochemical cycling on the 4 V plateau. Various compositions were cycled galvanostatically (C/15 rate) from 3.3 to 4.4 V vs. Li metal at room temperature using a 1 M LiPF6 in ethylene carbonate/dimethyl carbonate (1:2) electrolyte. A rapid capacity fade was observed for LiMn2O4, which was mitigated to varying extents by substitution of some of the Mn by other metals. After cycling, the Li-7 magic angle spinning (MAS) NMR peaks broadened, and the peaks assigned to lithium near defects increased in relative intensity. These changes were most pronounced for the poor-performing LiMn2O4, and were almost undetectable in the most robust compositions. The results for the cycled electrodes were compared to results for electrodes which had been exposed to model degradation processes chosen so as to mimic failure by one of the possible mechanisms proposed in the literature. This comparison provided substantial evidence that manganese dissolution and concomitant Li-for-Mn ion exchange at the end-of-discharge is the dominant mode of failure on the 4 V plateau. Cr substitution effectively mitigated this failure mode. (C) 2002 The Electrochemical Society. C1 Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM mctucker@uclink4.berkeley.edu RI Cairns, Elton/E-8873-2012 OI Cairns, Elton/0000-0002-1179-7591 NR 36 TC 33 Z9 33 U1 1 U2 20 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 0013-4651 EI 1945-7111 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD MAY PY 2002 VL 149 IS 5 BP A574 EP A585 DI 10.1149/1.1466856 PG 12 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA 546LN UT WOS:000175275700011 ER PT J AU Sikora, M Schilling, CH Tomasik, P Li, CP AF Sikora, M Schilling, CH Tomasik, P Li, CP TI Dextrin plasticizers for aqueous colloidal processing of alumina SO JOURNAL OF THE EUROPEAN CERAMIC SOCIETY LA English DT Article DE Al2O3; dextrius; plasticizers; rheology; suspensions ID MALTODEXTRINS AB Rheological experiments were conducted to investigate the applicability of dextrins as plasticizers for the aqueous, colloidal processing of alumina ceramics. Upon the addition of 1-10 wt.% of dextrins, aqueous suspensions of 20 vol.% alpha-alumina exhibited a transition from strongly-flocculated, pseudoplastic behavior to a low-viscosity, Newtonian-like state. We evaluated rheological properties as a function of a range of polysaccharide molecular weights between 900 and 63 000 Daltons. Dextrins of molecular weight between 6450 and 15,000 Daltons were the most effective from the standpoint of cost and rheological performance. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Univ Agr, Dept Carbohydrate Technol, PL-30868 Krakow, Poland. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. Univ Agr, Dept Chem, PL-31120 Krakow, Poland. RP Sikora, M (reprint author), Univ Agr, Dept Carbohydrate Technol, 29 Listopad Ave, PL-30868 Krakow, Poland. EM rrsikora@cyf-kr.edu.pl NR 20 TC 9 Z9 9 U1 1 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0955-2219 EI 1873-619X J9 J EUR CERAM SOC JI J. Eur. Ceram. Soc. PD MAY PY 2002 VL 22 IS 5 BP 625 EP 628 AR PII S0955-2219(01)00337-5 DI 10.1016/S0955-2219(01)00337-5 PG 4 WC Materials Science, Ceramics SC Materials Science GA 522DU UT WOS:000173881100004 ER PT J AU Mitchell, BJ Richardson, JW Murphy, CD Ma, B Balachandran, U Hodges, JP Jorgensen, JD AF Mitchell, BJ Richardson, JW Murphy, CD Ma, B Balachandran, U Hodges, JP Jorgensen, JD TI Phase stability of SrFeCo0.5O gamma under synthesis and annealing conditions SO JOURNAL OF THE EUROPEAN CERAMIC SOCIETY LA English DT Article DE membranes; neutron diffraction; phase composition; stability; SrFeCo0.5O gamma ID NEUTRON-DIFFRACTION; CERAMIC MEMBRANES; OXYGEN PERMEATION; CRYSTAL; METHANE; SYNGAS; OXIDES AB Dense ceramic tubes of the multi phase mixed ionic/electronic conductor SrFeCo0.5Oy (SFC2) have been synthesized by solid-state reaction, Stability of the component phases of SFC2 was studied by insitu neutron diffraction in the temperature range of 900-1200 degreesC in air and Ar environments. In air between 900 and 1050 degreesC, the material is stable, with Sr-2(Fe,Co)(3)O-y (236) being the major phase. Above 1050 degreesC, 236 undergoes decomposition into perovskite and rocksalt phases, and at 1200 degreesC, only a small fraction of the 236 phase is stable. In Ar, the 236 phase is completely stable at 900 degreesC but is completely decomposed by 1100 degreesC, whereupon only the perovskite and rocksalt phases remain. Rietveld analysis indicates that the 236 and perovskite phases become more Fe-rich as decomposition occurs, while the perovskite phase lattice parameter and oxygen content vary readily as temperature and gas environment are changed. (C) 2002 Published by Elsevier Science Ltd. C1 Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. Argonne Natl Lab, Energy Technol Div, Argonne, IL 60439 USA. Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA. RP Richardson, JW (reprint author), Argonne Natl Lab, Intense Pulsed Neutron Source, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Hodges, Jason/K-1421-2013; Ma, Beihai/I-1674-2013; OI Ma, Beihai/0000-0003-3557-2773; Hodges, Jason/0000-0003-3016-4578 NR 23 TC 21 Z9 21 U1 0 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0955-2219 J9 J EUR CERAM SOC JI J. European Ceram. Soc. PD MAY PY 2002 VL 22 IS 5 BP 661 EP 671 AR PII S0955-2219(01)00367-3 DI 10.1016/S0955-2219(01)00367-3 PG 11 WC Materials Science, Ceramics SC Materials Science GA 522DU UT WOS:000173881100008 ER PT J AU Lee, S Park, S Falco, CM AF Lee, S Park, S Falco, CM TI Magnetic properties of Au/Co/Au films grown on vicinal Si(111) substrates SO JOURNAL OF THE KOREAN PHYSICAL SOCIETY LA English DT Article DE Brillouin scattering; magneto-optic Kerr effect; Co ID LIGHT-SCATTERING; ANISOTROPY; BRILLOUIN AB In this paper, we compare the magnetic properties of Au/Co/Au thin films grown by molecular bem epitaxy (MBE) on 4degrees-miscut Si(l I I) with those of Au/Co/Au thin films grown by MBE on non-miscut Si(111). The hysteresis curves measured using the magneto-optic Kerr effect showed strong perpendicular magnetic anisotropies (PMA) for both films. However, the spin wave frequencies measured using Brillouin light scattering showed that only those on non-miscut Si had a PMA. with those on 4degrees-miscut Si revealing the unusual spin wave frequency behavior. We speculate that Co deposited on 4degrees-miscut Si(111) has multiple domains, one domain having PMA and the others without PMA. which could be due to the high step density of vicinal Si(111) substrates. C1 Inha Univ, Dept Phys, Inchon 402751, South Korea. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA. RP Lee, S (reprint author), Inha Univ, Dept Phys, Inchon 402751, South Korea. NR 10 TC 2 Z9 2 U1 0 U2 0 PU KOREAN PHYSICAL SOC PI SEOUL PA 635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA SN 0374-4884 J9 J KOREAN PHYS SOC JI J. Korean Phys. Soc. PD MAY PY 2002 VL 40 IS 5 BP 913 EP 917 PG 5 WC Physics, Multidisciplinary SC Physics GA 552LW UT WOS:000175622700025 ER PT J AU Settersten, TB Linne, MA AF Settersten, TB Linne, MA TI Modeling pulsed excitation for gas-phase laser diagnostics SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID DEGENERATE 4-WAVE-MIXING SPECTROSCOPY; INDUCED FLUORESCENCE; NONPERTURBATIVE CALCULATIONS; SATURATION; SPECTRA; FLAMES AB Excitation dynamics for pulsed optical excitation are described with the density-matrix equations and the rate equations for a two-level system. A critical comparison of the two descriptions is made with complete and consistent formalisms that are amenable to the modeling of applied laser-diagnostic techniques. General solutions, resulting from numerical integration of the differential equations describing the excitation process, are compared for collisional conditions that range from the completely coherent limit to the steady-state limit, for which the two formalisms are identical. This analysis demonstrates the failure of the rate equations to correctly describe the transient details of the excitation process outside the steady-state limit. However reasonable estimates of the resultant population are obtained for nonsaturating (linear) excitation. This comparison provides the laser diagnostician with the means to evaluate the appropriate model for excitation through a simple picture of the breakdown of the rate-equation validity. (C) 2002 Optical Society of America. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA USA. Colorado Sch Mines, Ctr Combust & Environm Res, Golden, CO USA. RP Settersten, TB (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA USA. RI Settersten, Thomas/B-3480-2009 OI Settersten, Thomas/0000-0002-8017-0258 NR 25 TC 10 Z9 10 U1 2 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAY PY 2002 VL 19 IS 5 BP 954 EP 964 DI 10.1364/JOSAB.19.000954 PG 11 WC Optics SC Optics GA 555LE UT WOS:000175794900003 ER PT J AU Brilliant, NA Beach, RJ Drobshoff, AD Payne, SA AF Brilliant, NA Beach, RJ Drobshoff, AD Payne, SA TI Narrow-line ytterbium fiber master-oscillator power amplifier SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID SPONTANEOUS EMISSION; LASER; AMPLIFICATION; 3-LEVEL; GAIN AB We present modeled and experimental results for an ytterbium-doped fiber amplifier seeded with a narrow-linewidth master oscillator. We include a simplified model used to generate input for a model that numerically solves the coupled differential equations. We find good agreement between the model and measured data. (C) 2002 Optical Society of America. C1 USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Brilliant, NA (reprint author), USAF, Res Lab, Directed Energy Directorate, 3550 Aberdeen SE, Kirtland AFB, NM 87117 USA. NR 20 TC 6 Z9 7 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAY PY 2002 VL 19 IS 5 BP 981 EP 991 DI 10.1364/JOSAB.19.000981 PG 11 WC Optics SC Optics GA 555LE UT WOS:000175794900006 ER PT J AU He, KM Hakovirta, M Peters, AM Taylor, B Nastasi, M AF He, KM Hakovirta, M Peters, AM Taylor, B Nastasi, M TI Fluorine and boron co-doped diamond-like carbon films deposited by pulsed glow discharge plasma immersion ion processing SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID NITRIDE FILMS; IMPLANTATION; BACKSCATTERING; COATINGS; ENERGY AB Fluorine (F) and boron (B) co-doped diamond-like carbon (FB-DLC) films were prepared on different substrates by the plasma immersion ion processing (PIIP) technique. A pulse glow discharge plasma was used for the PIIP deposition and was produced at a pressure of 1.33 Pa from acetylene (C2H2), diborane (B2H6), and hexafluoroethane (C2F6) gas. Films of FB-DLC were deposited with different chemical compositions by varying the flow ratios of the C2H2, B2H6, and C2F6 source gases. The incorporation of B2H6 and C2F6 into PTIP deposited DLC resulted in the formation of F-C and B-C hybridized bonding structures. The levels of the F and B concentrations effected the chemical bonding and the physical properties as was evident from the changes observed in density, hardness, stress, friction coefficient, and contact angle of water on films. Compared to B-doped or F-doped DLC films, the F and B co-doping of DLC during PIIP deposition resulted in the formation of films that possessed a reduced hydrogen concentration and stress, while maintaining a high hardness, low friction coefficient, and high wetting contact angle. (C) 2002 American Vacuum Society. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP He, KM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 21 TC 5 Z9 5 U1 1 U2 7 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD MAY-JUN PY 2002 VL 20 IS 3 BP 638 EP 642 DI 10.1116/1.1460890 PG 5 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 555RG UT WOS:000175806600011 ER PT J AU Klepper, CC Hazelton, RC Yadlowsky, EJ Carlson, EP Keitz, MD Williams, JM Zuhr, RA Poker, DB AF Klepper, CC Hazelton, RC Yadlowsky, EJ Carlson, EP Keitz, MD Williams, JM Zuhr, RA Poker, DB TI Amorphous boron coatings produced with vacuum arc deposition technology SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article; Proceedings Paper CT IUVSTA 15th International Congress/AVS 48th International Symposium/11th International Conference on Solid Surfaces CY OCT 28-NOV 02, 2001 CL SAN FRANCISCO, CALIFORNIA SP IUVSTA, AVS ID FILMS; CARBON; EVAPORATION; CATHODE AB In principle, boron (B) as a material has many excellent surface properties, including corrosion resistance, very high hardness, refractory properties, and a strong tendency to bond with most substrates. The potential technological benefits of the material have not been realized, because it is difficult to deposit it as coatings. B is difficult to evaporate, does not sputter well, and cannot be thermally sprayed. In this article, first successful deposition results from a robust system, based on the vacuum (cathodic) are technology, are reported. Adherent coatings have been produced on 1100 Al, CP-Ti, Ti-6Al-4V, 316 SS, hard chrome plate, and 52 100 steel. Composition and thickness analyses have been performed by Rutherford backscattering spectroscopy. Hardness (H) and modules (E) have been evaluated by nanoindentation. The coatings are very pure and have properties characteristic of B suboxides. A microhardness of up to 27 GPa has been measured on a 400-nm-thick film deposited on 52 100 steel, with a corresponding modulus of 180 GPa. This gives a very high value for the HIE ratio, a figure-of-merit for impact resistance of the film. A number of applications are contemplated. including corrosion/abrasion protection for die-casting dies and improved wear resistance for biomedical implants. (C) 2002 American Vacuum Society. C1 HY Tech Res Corp, Radford, VA 24141 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Klepper, CC (reprint author), HY Tech Res Corp, Radford, VA 24141 USA. NR 24 TC 28 Z9 29 U1 3 U2 16 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD MAY-JUN PY 2002 VL 20 IS 3 BP 725 EP 732 DI 10.1116/1.1464844 PG 8 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 555RG UT WOS:000175806600025 ER PT J AU Woodworth, JR Abraham, IC Riley, ME Miller, PA Hamilton, TW Aragon, BP Shul, RJ Willison, CG AF Woodworth, JR Abraham, IC Riley, ME Miller, PA Hamilton, TW Aragon, BP Shul, RJ Willison, CG TI Ion energy distributions at rf-biased wafer surfaces SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID INDUCTIVELY-COUPLED PLASMA; RADIO-FREQUENCY DISCHARGES; HIGH-DENSITY PLASMAS; POWERED ELECTRODE; RADIOFREQUENCY DISCHARGES; ANGULAR-DISTRIBUTIONS; REFERENCE CELL; ARGON; SHEATHS; REACTORS AB We report the measurement of ion energy distributions at a radio frequency (rf)-biased electrode in inductively driven discharges in argon. We compare measurements made with a gridded energy analyzer and a commercial analyzer that contains a mass spectrometer and energy analyzer in tandem. The inductive drive and the rf bias in our Gaseous Electronics Conference reference cell were both at 13.56 MHz. By varying the plasma density, we were able to examine the transition region between the "low frequency limit" for rf bias and the intermediate frequency region where, at fixed bias frequency, the ion energy distribution width varies with the plasma density. We find that the experimental ion energy distributions become narrower as the time for ion transit through the sheath approaches the rf period, but that the ion distributions still have widths which are similar to90% of their low frequency limit when the ion transit time is 40% of the rf period. Space-charge-induced beam broadening inside our analyzers appears to significantly affect our measurements of ion angular distributions, especially at low ion energies. (C) 2002 American Vacuum Society. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Woodworth, JR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 51 TC 36 Z9 36 U1 1 U2 5 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD MAY-JUN PY 2002 VL 20 IS 3 BP 873 EP 886 DI 10.1116/1.1472421 PG 14 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 555RG UT WOS:000175806600049 ER PT J AU Alzoubi, MF Ajayi, OO Woodford, JB Erdemir, A Fenske, GR AF Alzoubi, MF Ajayi, OO Woodford, JB Erdemir, A Fenske, GR TI Scuffing performance of amorphous carbon during dry-sliding contact SO LUBRICATION ENGINEERING LA English DT Article; Proceedings Paper CT ASME/STLE Tribology Conference CY OCT 01-04, 2000 CL SEATTLE, WASHINGTON SP Soc Tribologists & Lubricat Engineers, ASME DE scuffing; scuff resistance; friction; coating adhesion; wear AB Scuffing is a major problem that limits the life and reliability of sliding tribo-components. When scuffing occurs, friction force rises sharply and is accompanied by an increase in noise and vibration; severe wear and plastic deformation also occur on the damaged surface. Attempts have been made over the years to combat scuffing by enhancing the surface properties of the machine elements, and have methods involving lubricant formulation and coating application. In this study, the authors evaluated the scuffing performance of an amorphous, near-frictionless carbon (NFC) coating that provides super-low friction under dry sliding conditions. The test configuration used a ball-on-flat contact in reciprocating sliding. The coating was deposited on H13 steel. An uncoated 52100 steel ball was tested against various coated flats in room air. Compared to uncoated surfaces, the carbon coating increased the scuffing resistance of the sliding surfaces by two orders of magnitude. Microscopic analysis shows that scuffing occurred on coated surfaces only if the coating had been completely removed. It appears that depending on coating type, the authors observed that coating failure occurs before scuffing failure by one of two distinct mechanisms., the coating failed in a brittle manner and by spalling, or by gradual wear. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Alzoubi, MF (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 18 TC 2 Z9 2 U1 0 U2 0 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 840 BUSSE HIGHWAY, PARK RIDGE, IL 60068 USA SN 0024-7154 J9 LUBR ENG JI Lubric. Eng. PD MAY PY 2002 VL 58 IS 5 BP 21 EP 26 PG 6 WC Engineering, Mechanical SC Engineering GA 552EK UT WOS:000175606100004 ER PT J AU Alam, TM Pedrotty, DM Boyle, TJ AF Alam, TM Pedrotty, DM Boyle, TJ TI Modified, pulse field gradient-enhanced inverse-detected HOESY pulse sequence for reduction of t(1) spectral artifacts SO MAGNETIC RESONANCE IN CHEMISTRY LA English DT Article DE NMR; HOESY; H-1 NMR; Li-7 NMR; inverse-detected; gradient-enhanced; pulse field gradient ID TRANSIENT CHANGES; NMR; CS-133; PEAKS; WATER; MNDO AB A modified pulse field gradient (PFG)-enhanced inverse (H-1)-detected 2D heteronuclear Overhauser effect spectroscopy (HOESY) pulse sequence is demonstrated for the acquisition of H-1-Li-7 heteronuclear correlations. In practice, t(1) noise artifacts were observed using the original PFG-enhanced inverse-detected HOESY pulse sequence, which degraded the ability to detect accurately weak heteronuclear Overhauser signals. Experimentally it is shown that a simple modification of the PFG-enhanced inverse-detected HOESY pulse sequence greatly reduces the t(1) noise that may result from variations in magnetic susceptibility, and allows improved detection of weak H-1-Li-7 correlations. Copyright (C) 2002 John Wiley Sons, Ltd. C1 Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA. Sandia Natl Labs, Dept Chem Mat, Albuquerque, NM 87106 USA. RP Alam, TM (reprint author), Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA. NR 19 TC 16 Z9 17 U1 3 U2 9 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0749-1581 J9 MAGN RESON CHEM JI Magn. Reson. Chem. PD MAY PY 2002 VL 40 IS 5 BP 361 EP 365 DI 10.1002/mrc.1019 PG 7 WC Chemistry, Multidisciplinary; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 543VG UT WOS:000175121400006 ER PT J AU Hu, JZ Rommereim, DN Wind, RA AF Hu, JZ Rommereim, DN Wind, RA TI High-resolution H-1 NMR spectroscopy in rat liver using magic angle turning at a 1 Hz spinning rate SO MAGNETIC RESONANCE IN MEDICINE LA English DT Article DE high-resolution H-1 spectroscopy; rat liver; magic angle turning; PHORMAT; magic angle spinning ID NUCLEAR-MAGNETIC-RESONANCE; CHEMICAL-SHIFT; AMPLITUDE-MODULATION; GRADIENT; H-1-NMR; SOLIDS; DIFFUSION; TISSUE; SAMPLE; CELLS AB It is demonstrated that a high-resolution H-1 NMR spectrum of excised rat liver can be obtained using the technique of magic angle turning (MAT) at a sample spinning rate of 1 Hz. A variant of the phase-corrected MAT (PHORMAT) pulse sequence that includes a water suppression segment was developed for the investigation. The spectral resolution achieved with PHORMAT approaches that obtained from a standard magic angle spinning (MAS) experiment at a spinning rate of several kHz. With such ultra-slow spinning, tissue and cell damage associated with the standard MAS experiment is minimized or eliminated. The technique is potentially useful for obtaining highresolution H-1 spectra in live animals. (C) 2002 Wiley-Liss, Inc. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Wind, RA (reprint author), Pacific NW Natl Lab, POB 999,MS K8-98, Richland, WA 99352 USA. RI Hu, Jian Zhi/F-7126-2012 NR 30 TC 37 Z9 40 U1 1 U2 12 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0740-3194 J9 MAGNET RESON MED JI Magn. Reson. Med. PD MAY PY 2002 VL 47 IS 5 BP 829 EP 836 DI 10.1002/mrm.10139 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 547RT UT WOS:000175346100001 PM 11979560 ER PT J AU Frueh, C Poirier, DR Felicelli, SD AF Frueh, C Poirier, DR Felicelli, SD TI Predicting freckle-defects in directionally solidified Pb-Sn alloys SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE freckles; Rayleigh number; solidification; Pb-Sn ID COLUMNAR-DENDRITIC ALLOYS; NICKEL-BASE SUPERALLOY; SINGLE-CRYSTAL; BINARY-ALLOYS; INTERDENDRITIC LIQUID; CHANNEL FORMATION; ARRAYED GROWTH; MACROSEGREGATION; FLOW; CONVECTION AB This work validates a finite element model of dendritic solidification by comparing predicted results to data resulting from 11 directionally solidified hypocutectic Pb-Sn samples, which were produced under various thermal gradients and solidification growth rates. For all but one of the cases, which was thought to be borderline between freckling and not freckling, predictions of whether freckles formed were supported by experiments. It was also determined that freckling could be predicted by running a simulation with convection turned on only after a mushy zone was fully developed; this saves computational time and lends credibility to the notion of using a non-dimensional freckling criterion such as a Rayleigh number. Finally, with D as the diffusivity of Sri in the liquid and V the growth rate, setting the mesh spacing in the growth direction at only D/V at the dendrite tips, and allowing the element size to be coarser throughout the rest of the domain, the simulations accurately predicted freckling consistent with results produced using a uniform mesh spacing of D/V. By testing the simulated system to see whether convection produces freckles after a completely developed mushy zone evolves and by employing a non-uniform mesh, a considerable saving in computational time for predicting freckles was achieved. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA. Sandia Natl Labs, Mech Reliabil & Melting Dept, Albuquerque, NM 87185 USA. Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. RP Poirier, DR (reprint author), Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA. NR 67 TC 32 Z9 34 U1 1 U2 10 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD MAY PY 2002 VL 328 IS 1-2 BP 245 EP 255 AR PII S0921-5093(01)01700-2 DI 10.1016/S0921-5093(01)01700-2 PG 11 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 550GG UT WOS:000175494800033 ER PT J AU Agrawal, H Gokhale, AM Graham, S Horstemeyer, MF Bamman, DJ AF Agrawal, H Gokhale, AM Graham, S Horstemeyer, MF Bamman, DJ TI Rotations of brittle particles during plastic deformation of ductile alloys SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE aluminum alloys; damage; microstructure; alignment; particle rotations ID SILICON PARTICLES; DAMAGE EVOLUTION; COMPOSITES; NUCLEATION; FRACTURE AB Experimental evidence is presented to show that significant rotations of brittle phase inclusions of a Fe-rich intermetallic phase occur during plastic deformation on an Al-Mg-Si base wrought aluminum alloy. The particle rotations are quantitatively characterized, for uniaxial tension, compression, torsion, and notch-tension test specimens strained to different strain levels. The particle rotations are monitored by measuring the morphological orientation distribution function of the particles. Significant particle rotations occur under all loading conditions. The morphological orientation distribution function evolves with plastic strain under uniaxial tension, compression, and torsion. The particles tend to align themselves in the direction parallel to applied (or induced) tensile stress for deformation under tension and compression. In the case, of torsion test specimens, at least up to 98% torsion strain, the particles tend to align along the direction at an angle of 45degrees to torsion axis. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Gokhale, AM (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA. OI Horstemeyer, Mark/0000-0003-4230-0063 NR 24 TC 7 Z9 7 U1 0 U2 5 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD MAY PY 2002 VL 328 IS 1-2 BP 310 EP 316 AR PII S0921-5093(01)01833-0 DI 10.1016/S0921-5093(01)01833-0 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 550GG UT WOS:000175494800041 ER PT J AU Clark, AE Wun-Fogle, M Restorff, JB Lograsso, TA AF Clark, AE Wun-Fogle, M Restorff, JB Lograsso, TA TI Magnetostrictive properties of galfenol alloys under compressive stress SO MATERIALS TRANSACTIONS LA English DT Article; Proceedings Paper CT 4th Pacific Rim International Conference on Advanced Materials and Processing (PRICM4) CY DEC 11-15, 2001 CL HONOLULU, HI SP Japan Inst Met, Chinese Soc Met, Korean Inst Met & Mat, Minerals, Met & Mat Soc, Iketani Sci & Technol Fdn, USN, Off Naval Res Int Field Off, Asian Off Aerosp Res & Dev, USA Res Off Far E DE magnetostriction; Galfenol; iron-gallium alloys ID FE-GA; AL ALLOYS AB Fe-Ga alloys, in which the alpha-Fe structure is maintained, are rich sources of high strength, low cost magnetostrictive alloys for transducer and vibration reduction applications. Although the magnetostriction of Fe itself is very low, when a relatively small fraction of the Fe atoms are replaced by Ga, the magnetostriction, (3/2)lambda(100), increases greatly. Until recently, the highest magnetostriction was found with the replacement of Fe by Al (Alfenol). In this paper, we present our measurements of magnetostriction on Fe1-xGax, 0.13 less than or equal to x less than or equal to 0.24, (Galfenol). With the substitution of 19% Ga for Fe in Fe1-xGax, a 12-fold increase in magnetostriction to similar to400 ppm occurs, even though Ga is non-magnetic. In these alloys, the saturation magnetizations remain high, M-s congruent to 1.7 T, and the Curie temperatures are far above room temperature, T-C congruent to 700degreesC. In most alloys studied, the magnetostrictions and magnetizations are fully saturated in fields less than 24 kA/m, even under compressive stresses > 100 MPa. For x = 0.24 (near Fe3Ga), an anomalous increase in magnetostriction with temperature occurs with a peak magnetostriction above room temperature. Small additions of Ni and Mo to the binary Fe-Ga alloys decrease the room temperature value of lambda(100). C1 Clark Associates, Adelphi, MD 20783 USA. USN, Surface Warfare Ctr, Carderock Div, Bethesda, MD 20817 USA. Ames Lab, Ames, IA 50011 USA. RP Clark, AE (reprint author), Clark Associates, Adelphi, MD 20783 USA. NR 13 TC 111 Z9 118 U1 7 U2 28 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAY PY 2002 VL 43 IS 5 SI SI BP 881 EP 886 DI 10.2320/matertrans.43.881 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 562RE UT WOS:000176212100021 ER PT J AU Serizawa, H Lewinsohn, CA Murakawa, H AF Serizawa, H Lewinsohn, CA Murakawa, H TI FEM analysis of asymmetrical bending test for smart materials joints SO MATERIALS TRANSACTIONS LA English DT Article; Proceedings Paper CT 4th Pacific Rim International Conference on Advanced Materials and Processing (PRICM4) CY DEC 11-15, 2001 CL HONOLULU, HI SP Japan Inst Met, Chinese Soc Met, Korean Inst Met & Mat, Minerals, Met & Mat Soc, Iketani Sci & Technol Fdn, USN, Off Naval Res Int Field Off, Asian Off Aerosp Res & Dev, USA Res Off Far E DE joining; shear strength; silicon carbide (SiC); composite; finite clement method; thermal residual stress ID COMPOSITES; CERAMICS AB SiC/SiC composites with a thermal coating, have been developed as smart composites for high temperature applications, where the Joint techniques are indispensable for constructing large scale structures due to the fabrication and economical reasons. Since one of the important issues is the establishment of a design database for the joint strength, the testing method has to be carefully selected based on the theoretical background. In this study, the stress distribution of a SiC/SiC composite specimen containing a butt,joint consisting of reaction-formed silicon carbide tested by the asymmetrical four-point bending test was precisely analyzed by the finite element method as a means to evaluate the applicability of analytical results. In the case without the effect of the thermal residual stresses, the shear stress distribution at the interface between the base and the joint almost agreed with the analytical theory. For the case with the residual stress, however, the shear stress near the surface was very large and the possibility of an initial crack induced by the residual stress was considered. Moreover, it was found that the residual shear stress distribution near the surface was significantly affected by the joint thickness. C1 Osaka Univ, Joining & Welding Res Inst, Ibaraki 5670047, Japan. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Serizawa, H (reprint author), Osaka Univ, Joining & Welding Res Inst, Ibaraki 5670047, Japan. NR 18 TC 3 Z9 3 U1 1 U2 2 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAY PY 2002 VL 43 IS 5 SI SI BP 994 EP 1000 DI 10.2320/matertrans.43.994 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 562RE UT WOS:000176212100038 ER PT J AU Riley, KJ Binns, PJ Greenberg, DD Harling, OK AF Riley, KJ Binns, PJ Greenberg, DD Harling, OK TI A physical dosimetry intercomparison for BNCT SO MEDICAL PHYSICS LA English DT Article DE BNCT; thermal neutrons; dosimetry intercomparison ID NEUTRON-CAPTURE THERAPY; PHANTOM MATERIALS AB An intercomparison of physical dosimetry methods used at the Massachusetts Institute of Technology (MIT) and Brookhaven National Laboratory was completed to enable retrospective analysis of BNCT trials. Measurements were performed under reference conditions pertinent to clinical irradiations at the epithermal neutron beam facility of the Brookhaven Medical Research Reactor (BMRR) using procedures developed at MIT during similar trials. Thermal neutron flux was determined from gold foil activation experiments and good agreement was found between the depth profiles measured in-phantom by the two groups. At a depth of 3.5 cm where the measured flux is greatest, the ratio of the MIT/BMRR measurements is 1.01+/-0.10 if the same reporting procedures are applied. Photon and fast neutron absorbed dose rates were assessed using ionization chambers with separate graphite and A-150 plastic walls. Measurement of the in-phantom photon depth dose component agreed favorably with that previously reported by the BMRR group using thermoluminescent dosimeters. At a depth of 3.5 cm the ratio of the MIT measurements to those made by the BMRR group was 0.89+/-0.12. In-air measurements of the fast neutron and photon absorbed dose rates agreed within the limits of experimental uncertainty. Additional studies were performed in the ellipsoidal water phantom regularly used for beam characterizations at MIT. No significant differences in the thermal neutron flux measured in either a solid PMMA cube or an ellipsoidal shaped water phantom were observed on the central axis of the beam. This study confirms the reproducibility and uniformity of dosimetry measurements performed by the two independent groups undertaking BNCT trials in the USA and provides the physical data necessary to compare BMRR treatment protocols with those applied at Harvard-MIT. (C) 2002 American Association of Physicists in Medicine. C1 MIT, Nucl Reactor Lab, Cambridge, MA 02139 USA. Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Binns, PJ (reprint author), MIT, Nucl Reactor Lab, 138 Albany St, Cambridge, MA 02139 USA. NR 12 TC 16 Z9 16 U1 0 U2 3 PU AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0094-2405 J9 MED PHYS JI Med. Phys. PD MAY PY 2002 VL 29 IS 5 BP 898 EP 904 DI 10.1118/1.1473133 PG 7 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 553KU UT WOS:000175675000028 PM 12033586 ER PT J AU McCabe, RJ Fine, ME AF McCabe, RJ Fine, ME TI Creep of tin, Sb-solution-strengthened tin, and SbSn-precipitate-strengthened tin SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID HIGH-TEMPERATURE CREEP; SINGLE-CRYSTALS; COMPOSITES; DISLOCATIONS; PARTICLES; STRESS; ALLOYS; CLIMB AB The creep properties of tin-antimony alloys were studied up to the peritectic composition. For tin at temperatures below approximately 150 degreesC, creep is dominated by pipe diffusion-controlled climb with a stress exponent of 8 and activation energy of 70 kJ/mol. At high stresses, small amounts of impurities cause a transition to a less stress sensitive, most likely solute drag-controlled mechanism. Antimony atoms in solution have only a minor effect on these creep properties. Alloys with higher compositions of antimony contain whiskerlike SbSn precipitates. These alloys exhibit a discontinuous transition in stress exponent and activation energy at an intermediate stress. The creep behavior of these alloys is described fairly well by a composite theory in which the power law stress is divided by a strengthening coefficient, and the strengthening coefficient is related to the precipitate volume fraction and the aspect ratio. Using a friction stress and a strengthening coefficient simultaneously, the behavior of these alloys can be described entirely in terms of tin creep constants. Aging at 100 degreesC has little effect on the creep properties of the precipitation-strengthened alloys. It is expected that solder alloys strengthened by these precipitates would maintain a significant fraction of their creep strength for significant periods at temperatures below 100 degreesC. C1 Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. RP McCabe, RJ (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Struct Property Relat Grp, POB 1663, Los Alamos, NM 87545 USA. RI Fine, Morris/B-7516-2009 NR 39 TC 62 Z9 63 U1 1 U2 13 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAY PY 2002 VL 33 IS 5 BP 1531 EP 1539 DI 10.1007/s11661-002-0075-8 PG 9 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 548FA UT WOS:000175376900019 ER PT J AU Moore, KT Howe, JM Veblen, DR AF Moore, KT Howe, JM Veblen, DR TI On the solute field and composition of gamma plates in an Al-22 at. pct Ag alloy SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID DISLOCATION INTERPHASE BOUNDARIES; TRANSMISSION ELECTRON-MICROSCOPY; GROWTH-KINETICS; ATOMIC MECHANISMS; SILVER ALLOYS; KINK MOTION; FCC MATRIX; PRECIPITATE; AL-4.2; MIGRATION C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. Univ Virginia, Dept Mat Sci, Charlottesville, VA 22903 USA. Johns Hopkins Univ, Dept Mineral, Baltimore, MD 21218 USA. RP Moore, KT (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. NR 33 TC 4 Z9 4 U1 0 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAY PY 2002 VL 33 IS 5 BP 1561 EP 1565 DI 10.1007/s11661-002-0079-4 PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 548FA UT WOS:000175376900023 ER PT J AU Brown, PG ReVelle, DO Tagliaferri, E Hildebrand, AR AF Brown, PG ReVelle, DO Tagliaferri, E Hildebrand, AR TI An entry model for the Tagish Lake fireball using seismic, satellite and infrasound records SO METEORITICS & PLANETARY SCIENCE LA English DT Article ID METEORITE; NETWORK; BODIES; BOLIDE; ORBIT; WAVES; FALL AB We present instrumental observations of the Tagish Lake fireball and interpret the observed characteristics in the context of two different models of ablation. From these models we estimate the pre-atmospheric mass of the Tagish Lake meteoroid to be similar to56 tonnes and its porosity to be between 37 and 58%, with the lowest part of this range most probable. These models further suggest that some 1300 kg of gram-sized or larger Tagish Lake material survived ablation to reach the Earth's surface, representing an ablation loss of 97% for the fireball. Satellite recordings of the Tagish Lake fireball indicate that 1.1 x 10(12) J of optical energy were emitted by the fireball during the last 4 s of its flight. The fraction of the total kinetic energy converted to light in the satellite pass band is found to be 16%. Infrasonic observations of the air-wave associated with the fireball establish a total energy for the event of 1.66 +/- 0.70 kT TNT equivalent energy. The fraction of this total energy converted to acoustic signal energy is found to be between 0.10 and 0.23%. Examination of the seismic recordings of the airwave from Tagish Lake have established that the acoustic energy near the sub-terminal point is converted to seismic body waves in the upper-most portion of the Earth's crust. The acoustic energy to seismic energy coupling efficiency is found to be near 10(-6) for the Tagish Lake fireball. The resulting energy estimate is near 1.7 kT, corresponding to a meteoroid 4 in in diameter. The seismic record indicates extensive, nearly continuous fragmentation of the body over the height intervals from 50 to 32 kin. Seismic and infrasound energy estimates are in close agreement with the preatmospheric mass of 56 tonnes established from the modeling. The observed flight characteristics of the Tagish Lake fireball indicate that the bulk compressive strength of the pre-atmospheric Tagish Lake meteoroid was near 0.25 MPa, while the material compressive strength (most appropriate to the recovered meteorites) was closer to 0.7 MPa. These are much lower than values found for fireballs of ordinary chondritic composition. The behavior of the Tagish Lake fireball suggests that it represents the lowest end of the strength spectrum of carbonaceous chondrites or the high end of cometary meteoroids. The bulk density and porosity results for the Tagish Lake meteoroid suggest that the low bulk densities measured for some small primitive bodies in the solar system may reflect physical structure dominated by microporosity rather than macroporosity and rubble-pile assemblages. C1 Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. ET Space Syst, Camarillo, CA 93012 USA. Univ Calgary, Dept Geol & Geophys, Calgary, AB T2N 1N4, Canada. RP Brown, PG (reprint author), Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada. NR 34 TC 61 Z9 61 U1 0 U2 3 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 1086-9379 J9 METEORIT PLANET SCI JI Meteorit. Planet. Sci. PD MAY PY 2002 VL 37 IS 5 BP 661 EP 675 AR UNSP MS#4709 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 558MR UT WOS:000175971600004 ER PT J AU Deng, W Bodart, P Pruski, M Shanks, BH AF Deng, W Bodart, P Pruski, M Shanks, BH TI Characterization of mesoporous alumina molecular sieves synthesized by nonionic templating SO MICROPOROUS AND MESOPOROUS MATERIALS LA English DT Article DE mesoporous alumina; alumina thermal stability; aluminum coordination quantification; nonionic templating; alumina characterization ID ANGLE-SPINNING NMR; MQMAS NMR; HYDROLYSIS; COPOLYMER; ALKOXIDES; SITES; ACID AB Mesoporous aluminas were produced by nonionic supramolecular templating and characterized to determine the stability of their physical structure during extended calcination at elevated temperatures. The effect of synthesis temperature on the physical structure of these materials and the resulting thermal evolution from synthesized aluminum hydroxide to transitional alumina was studied using thermogravimetric analysis. A high resolution multiple quantum magic angle spinning NMR spectroscopy method was used to determine quantitatively the evolution of the aluminum coordination during the thermal processing. The mesoporous alumina exhibited high stability upon prolonged heating, which is essential for their future applications in catalytic chemistry. (C) 2002 Elsevier Science Inc. All rights reserved. C1 Iowa State Univ Sci & Technol, Dept Chem Engn, Ames, IA 50011 USA. US DOE, Ames Lab, Ames, IA 50011 USA. RP Shanks, BH (reprint author), Iowa State Univ Sci & Technol, Dept Chem Engn, 2114 Sweeney Hall, Ames, IA 50011 USA. RI Deng, Weihua/E-2895-2010 NR 28 TC 64 Z9 74 U1 4 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-1811 J9 MICROPOR MESOPOR MAT JI Microporous Mesoporous Mat. PD MAY PY 2002 VL 52 IS 3 BP 169 EP 177 AR PII S1387-1811(02)00315-3 DI 10.1016/S1387-1811(02)00315-3 PG 9 WC Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 559GZ UT WOS:000176019600004 ER PT J AU Domeier, LA Gonzales, M Hachman, J Hruby, JM Janek, R Morales, AM AF Domeier, LA Gonzales, M Hachman, J Hruby, JM Janek, R Morales, AM TI Microscreen-based replication of electroforming micromolds SO MICROSYSTEM TECHNOLOGIES LA English DT Article; Proceedings Paper CT 4th International Workshop on High Aspect Ratio Micro Structure Technology (HARMST 01) CY JUN 17-19, 2001 CL BADEN BADEN, GERMANY ID LIGA; MICROSTRUCTURES; METALS AB Novel technology is presented which allows the rapid replication of electroforming plastic micromolds. This technique incorporates microscreens into hot embossing or injection molding processes to produce sacrificial molds with conducting bases and insulating sidewalls. Both contiguous and non-contiguous features can be electroformed from these molds. Process parameters including the microscreen geometry and the use of multiple porous metal inserts are discussed. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Domeier, LA (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. NR 11 TC 5 Z9 5 U1 1 U2 2 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0946-7076 J9 MICROSYST TECHNOL JI Microsyst. Technol. PD MAY PY 2002 VL 8 IS 2-3 BP 78 EP 82 DI 10.1007/S00542-001-0135-9 PG 5 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Science & Technology - Other Topics; Materials Science; Physics GA 564FB UT WOS:000176303400003 ER PT J AU Griffiths, SK Ting, A AF Griffiths, SK Ting, A TI The influence of X-ray fluorescence on LIGA sidewall tolerances SO MICROSYSTEM TECHNOLOGIES LA English DT Article; Proceedings Paper CT 4th International Workshop on High Aspect Ratio Micro Structure Technology (HARMST 01) CY JUN 17-19, 2001 CL BADEN BADEN, GERMANY ID STRUCTURE QUALITY; LITHOGRAPHY AB Fluorescence radiation during LIGA X-ray exposure and the impact of the resulting secondary dose on feature sidewall tolerances are examined using numerical methods. The study addresses fluorescence emitted by the substrate of the PMMA resist and focuses on the tolerances obtained for resists patterned with a range of feature sizes. New models of the secondary dose and subsequent feature development are presented and discussed. These models are coupled such that the evolving feature geometry during development depends on the local total dose, as well as the development temperature and the transport of PMMA fragments away from the dissolution front. We find that sidewall tolerances for typical exposure and development conditions are less than 0.1 micron for a metallized silicon substrate, but exceed several microns for thick titanium, copper and nickel substrates. We also find that these tolerances are very sensitive to the feature geometry, development temperature and the magnitude of the primary dose. C1 Sandia Natl Labs, Chem & Mat Proc Modeling Dept, Livermore, CA 94551 USA. RP Griffiths, SK (reprint author), Sandia Natl Labs, Chem & Mat Proc Modeling Dept, Livermore, CA 94551 USA. NR 15 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0946-7076 J9 MICROSYST TECHNOL JI Microsyst. Technol. PD MAY PY 2002 VL 8 IS 2-3 BP 120 EP 128 DI 10.1007/S00542-002-0164-z PG 9 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Science & Technology - Other Topics; Materials Science; Physics GA 564FB UT WOS:000176303400013 ER PT J AU O'Connor, WK Dahlin, DC Rush, GE Dahlin, CL Collins, WK AF O'Connor, WK Dahlin, DC Rush, GE Dahlin, CL Collins, WK TI Carbon dioxide sequestration by direct mineral carbonation: process mineralogy of feed and products SO MINERALS & METALLURGICAL PROCESSING LA English DT Article DE mineral carbonation; carbon dioxide sequestration; carbonates AB Direct mineral carbonation was investigated as a process to convert gaseous CO2 into a geologically stable final form. The process utilizes a slurry of water, with bicarbonate and salt additions, mixed with a mineral reactant, such as olivine (Mg2SiO4) or serpentine [Mg3Si2O5(OH)(4)]. Carbon dioxide is dissolved into this slurry, resulting in dissolution of the mineral and precipitation of magnesium carbonate (MgCO3). Optimum results were achieved using heat-pretreated serpentine feed material and a high partial pressure of CO2 (P-CO2). Specific conditions include 155degreesC, P-CO2 185 atm and 15% solids. Under these conditions, a 78% conversion of the silicate to the carbonate was achieved in 30 minutes. Process mineralogy was utilized to investigate the appropriate feed characteristics, identify the process products and interpret the mineral dissolution and carbonate precipitation reaction paths. C1 US DOE, Off Fossil Energy, Albany Res Ctr, Albany, OR USA. RP O'Connor, WK (reprint author), US DOE, Off Fossil Energy, Albany Res Ctr, Albany, OR USA. NR 8 TC 80 Z9 88 U1 0 U2 18 PU SOC MINING METALLURGY EXPLORATION INC PI LITTLETON PA 8307 SHAFFER PARKWAY, LITTLETON, CO 80127 USA SN 0747-9182 J9 MINER METALL PROC JI Miner. Metall. Process. PD MAY PY 2002 VL 19 IS 2 BP 95 EP 101 PG 7 WC Metallurgy & Metallurgical Engineering; Mining & Mineral Processing SC Metallurgy & Metallurgical Engineering; Mining & Mineral Processing GA 557YT UT WOS:000175937200006 ER PT J AU Deane, CM Salwinski, L Xenarios, I Eisenberg, D AF Deane, CM Salwinski, L Xenarios, I Eisenberg, D TI Protein interactions - Two methods for assessment of the reliability of high throughput observations SO MOLECULAR & CELLULAR PROTEOMICS LA English DT Article ID SACCHAROMYCES-CEREVISIAE; 2-HYBRID SYSTEMS; INTERACTION MAPS; YEAST; DATABASE; GENOME; EXPRESSION; NETWORKS; INFORMATION; PROGRAMS AB High throughput methods for detecting protein interactions require assessment of their accuracy. We present two forms of computational assessment. The first method is the expression profile reliability (EPR) index. The EPR index estimates the biologically relevant fraction of protein interactions detected in a high throughput screen. It does so by comparing the RNA expression profiles for the proteins whose interactions are found in the screen with expression profiles for known interacting and non-interacting pairs of proteins. The second form of assessment is the paralogous verification method (PVM). This method judges an interaction likely if the putatively interacting pair has paralogs that also interact. In contrast to the EPR index, which evaluates datasets of interactions, PVM scores individual interactions. On a test set, PVM identifies correctly 40% of true interactions with a false positive rate of similar to1%. EPR and PVM were applied to the Database of Interacting Proteins (DIP), a large and diverse collection of protein-protein interactions that contains over 8000 Saccharomyces cerevisiae pairwise protein interactions. Using these two methods, we estimate that similar to50% of them are reliable, and with the aid of PVM we identify confidently 3003 of them. Web servers for both the PVM and EPR methods are available on the DIP website (dip. doe-mbi.ucia.edu/Services.cgi). C1 Univ Calif Los Angeles, Howard Hughes Med Inst, Inst Mol Biol, UCLA DOE Lab Struct Biol & Mol Med, Los Angeles, CA 90095 USA. RP Eisenberg, D (reprint author), Univ Calif Los Angeles, Howard Hughes Med Inst, Inst Mol Biol, UCLA DOE Lab Struct Biol & Mol Med, POB 951570, Los Angeles, CA 90095 USA. OI Deane, Charlotte/0000-0003-1388-2252; Xenarios, Ioannis/0000-0002-3413-6841 NR 34 TC 424 Z9 443 U1 2 U2 19 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 1535-9476 J9 MOL CELL PROTEOMICS JI Mol. Cell. Proteomics PD MAY PY 2002 VL 1 IS 5 BP 349 EP 356 DI 10.1074/mcp.M100037-MCP200 PG 8 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 654UX UT WOS:000181515400001 PM 12118076 ER PT J AU Amoureux, JP Pruski, M AF Amoureux, JP Pruski, M TI Theoretical and experimental assessment of single- and multiple-quantum cross-polarization in solid state NMR SO MOLECULAR PHYSICS LA English DT Article ID ANGLE-SPINNING NMR; RESOLUTION HETERONUCLEAR CORRELATION; NUCLEAR-MAGNETIC-RESONANCE; INTEGER QUADRUPOLAR NUCLEI; MAS NMR; DIPOLAR INTERACTIONS; SPIN-1/2 NUCLEI; LOCK SEQUENCES; MQMAS NMR; SYSTEMS AB Continuous wave cross-polarization (CP) NMR experiments with magic angle spinning (MAS) are reviewed for the case of isolated spin pairs I-S, with spin quantum numbers I = 1/2 and S greater than or equal to 1/2 (1/2, 3/2,...). For two spin-1/2 nuclei, the Hartmann-Hahn matching conditions are examined at various sample rotation rates nu(R), especially with regard to off-resonance behaviour. In addition to signal enhancement, the CPMAS experiment can be used for the selective determination of inter-nuclear distances between spin-1/2 nuclei. Theoretical examination of the CP transfers to single-quantum (1Q-CPMAS) and multiple-quantum (MQ-CPMAS) levels of quadrupolar nuclei is presented. Simple analytical formulae describing the Hartmann-Hahn matching under various experimental conditions are verified using computer simulations of the spin density matrix under MAS, and the experimental data. The strategies for the most efficient acquisition of 1Q-CPMAS and MQ-CPMAS spectra are extensively discussed. C1 Univ Lille, CNRS 8012, LCPS, F-59655 Villeneuve Dascq, France. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Pruski, M (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. NR 56 TC 57 Z9 58 U1 3 U2 17 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0026-8976 J9 MOL PHYS JI Mol. Phys. PD MAY PY 2002 VL 100 IS 10 BP 1595 EP 1613 DI 10.1080/00268970210125755 PG 19 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 555HR UT WOS:000175789100012 ER PT J AU Scranton, R AF Scranton, R TI Modelling galaxy clustering by colour SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE methods : numerical; large-scale structure of Universe ID CONDENSATION; UNIVERSE; PROFILES; HALOES; BIAS AB We extend the mass-halo formalism for analytically generating power spectra to allow for the different clustering behaviour observed in galaxy subpopulations. Although applicable to other separations, we concentrate our methods on a simple separation by rest-frame colour into 'red' and 'blue' subpopulations through modifications to the (M) relations and halo distribution functions for each of the subpopulations. This sort of separation is within the capabilities of the current generations of simulations as well as galaxy surveys, suggesting a potentially powerful observational constraint for current and future simulations. In anticipation of this, we demonstrate the sensitivity of the resulting power spectra to the choice of model parameters. C1 Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. NASA, Fermilab Astrophys Ctr, Batavia, IL 60510 USA. RP Scranton, R (reprint author), Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA. NR 23 TC 26 Z9 27 U1 0 U2 0 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAY PY 2002 VL 332 IS 3 BP 697 EP 704 DI 10.1046/j.1365-8711.2002.05325.x PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 553FD UT WOS:000175664400016 ER PT J AU Wadsworth, J AF Wadsworth, J TI Science and technology and counterterrorism SO MRS BULLETIN LA English DT Article C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Stanford Univ, Stanford, CA 94305 USA. RP Wadsworth, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0883-7694 J9 MRS BULL JI MRS Bull. PD MAY PY 2002 VL 27 IS 5 BP 348 EP 352 DI 10.1557/mrs2002.107 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 552QR UT WOS:000175631500002 ER PT J AU Pan, JW Coyle, PK Bashir, K Whitaker, JN Krupp, LB Hetherington, HP AF Pan, JW Coyle, PK Bashir, K Whitaker, JN Krupp, LB Hetherington, HP TI Metabolic differences between multiple sclerosis subtypes measured by quantitative MR spectroscopy SO MULTIPLE SCLEROSIS LA English DT Article DE magnetic resonance spectroscopy; metabolism; multiple sclerosis; N-acetyl aspartate; primary progressive ID MAGNETIC-RESONANCE SPECTROSCOPY; N-ACETYL-ASPARTATE; WHITE-MATTER; HUMAN BRAIN; 4.1 T; MS; LESIONS; EXPRESSION; DISEASE AB We used quantitative magnetic resonance (MR) spectroscopic imaging with T1-based image segmentation to evaluate the subtypes of multiple sclerosis (MS) (eight patients each group of relapsing-remitting [RR], secondary progressive [SP] and primary progressive [PP]). There was no significant difference in age between the PP group with the RP, SP or control group. We found that the metabolite ratio of choline/NA from the periventricular white matter region was not significantly different between the RR and SP groups. Using an ANOVA, the ratios of periventricular choline/NA or creatine/NA of these combined groups were significantly higher than the PP and control groups. Quantification of these data suggest that the major cause of the elevation of these parameters is due to an increase in choline and creatine in the RR group while NA is decreased in the SP group. Thus, early PP disease appears to be relatively intact with respect to neuronal loss. C1 SUNY Stony Brook, Brookhaven Natl Lab, Dept Med, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Neurol, Stony Brook, NY 11794 USA. Univ Alabama, Dept Neurol, Birmingham, AL 35294 USA. RP Pan, JW (reprint author), Albert Einstein Coll Med, Dept Neurol Neurosci, 1410 Pelham Pkway S 915B, Bronx, NY 10583 USA. NR 31 TC 14 Z9 15 U1 0 U2 2 PU ARNOLD, HODDER HEADLINE PLC PI LONDON PA 338 EUSTON ROAD, LONDON NW1 3BH, ENGLAND SN 1352-4585 J9 MULT SCLER JI Mult. Scler. PD MAY PY 2002 VL 8 IS 3 BP 200 EP 206 DI 10.1191/1352458502ms802oa PG 7 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA 561NV UT WOS:000176148300003 PM 12120690 ER PT J AU Schaaff, TG Blom, DA AF Schaaff, TG Blom, DA TI Deposition of Au-nanocrystals on TiO2 crystallites SO NANO LETTERS LA English DT Article ID CO OXIDATION; GOLD; CLUSTERS; SIZE; TRANSITION; FABRICATION; ADSORPTION; CATALYSTS; NANOPARTICLES; CALCINATION AB Under specific solution conditions, 2 nm (diameter) passivated gold nanocrystal compounds show preferential adsorption at boundaries between adjacent TiO2 crystallites. The extent of this preferential adsorption is dependent upon the concentration of the gold nanocrystals in toluene solutions. At high solution concentrations (>0.1 mg/mL), the nanocrystals align along the TiO2 crystallite boundaries, but also deposit nonpreferentially across the TiO2 crystallite faces. Below 0.1 mg/mL, the adsorption of the Au-nanocrystal compounds occurs nearly exclusively at the grain boundaries between adjacent TiO2 crystallites. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Schaaff, TG (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. NR 30 TC 45 Z9 47 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1530-6984 J9 NANO LETT JI Nano Lett. PD MAY PY 2002 VL 2 IS 5 BP 507 EP 511 DI 10.1021/nl010088u PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 552FR UT WOS:000175609200015 ER PT J AU Liu, GK Zhuang, HZ Chen, XY AF Liu, GK Zhuang, HZ Chen, XY TI Restricted phonon relaxation and anomalous thermalization of rare earth ions in nanocrystals SO NANO LETTERS LA English DT Article AB An anomalous thermalization effect induced by optical excitation of Er(3+) ions in nanocrystals of Y(2)O(2)S is investigated. Due to the absence of low-energy phonon modes in the 20-40 nm crystals we studied, phonon relaxation is restricted, and as a result, the intensity of hot bands that originate from the upper crystal field levels in the (4)I(15/2) ground state increases rapidly as temperature decreases below 8 K. This unusual increase in hot band intensity is interpreted satisfactorily by calculations of temperature dependent multiphonon relaxation rates in nanoparticles. Our theoretical analysis provides a fundamental understanding of confinement effects on the spectroscopic properties of rare earth ions in nanocrystals. This analysis applies also to the previously observed unusual hot bands in 4-6 nm particles of Eu(2)O(3). C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Liu, GK (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Chen, Xueyuan/C-5613-2012 OI Chen, Xueyuan/0000-0003-0493-839X NR 19 TC 92 Z9 94 U1 2 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1530-6984 J9 NANO LETT JI Nano Lett. PD MAY PY 2002 VL 2 IS 5 BP 535 EP 539 DI 10.1021/nl0255303 PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 552FR UT WOS:000175609200020 ER PT J AU Fischetti, M Lancia, G Serafini, P AF Fischetti, M Lancia, G Serafini, P TI Exact algorithms for minimum routing cost trees SO NETWORKS LA English DT Article DE network design; branch and price; computational biology ID SEQUENCE ALIGNMENT; NETWORK DESIGN AB Given a set of points and distances between them, a basic problem in network design calls for selecting a graph connecting them at a minimum total routing cost, that is, the sum over all pairs of points of the length of their shortest path in the graph. In this paper, we describe some branch-and-bound algorithms for the exact solution of a relevant special case arising when the graph has to be a tree. One of the enhancements to our algorithms is the use of "LP shortcutting," which we introduce as a general-purpose technique for speeding up the search. Besides network design, we show how trees of small routing cost find useful application in computational biology, where they can be used to determine good alignments of genomic sequences. This leads to a novel alignment heuristic that we analyze in our computational section. (C) 2002 Wiley Periodicals, Inc. C1 Univ Padua, Dipartimento Elettron & Informat, I-35100 Padua, Italy. Univ Udine, Dipartimento Matemat & Informat, I-33100 Udine, Italy. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Fischetti, M (reprint author), Univ Padua, Dipartimento Elettron & Informat, I-35100 Padua, Italy. NR 16 TC 18 Z9 19 U1 0 U2 1 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0028-3045 J9 NETWORKS JI Networks PD MAY PY 2002 VL 39 IS 3 BP 161 EP 173 DI 10.1002/net.10022 PG 13 WC Computer Science, Hardware & Architecture; Operations Research & Management Science SC Computer Science; Operations Research & Management Science GA 544JF UT WOS:000175153900006 ER PT J AU Eberling, JL Roberts, JA Taylor, SE VanBrocklin, HF O'Neil, JP Nordahl, TE AF Eberling, JL Roberts, JA Taylor, SE VanBrocklin, HF O'Neil, JP Nordahl, TE TI No effect of age and estrogen on aromatic L-amino acid decarboxylase activity in rhesus monkey brain SO NEUROBIOLOGY OF AGING LA English DT Article ID POSITRON EMISSION TOMOGRAPHY; DORSOLATERAL PREFRONTAL CORTEX; PARKINSONS-DISEASE; CHOLINE-ACETYLTRANSFERASE; DOPAMINERGIC FUNCTION; CEREBRAL-CORTEX; ECAT EXACT; 6-FLUORO-L-M-TYROSINE; HYDROXYLASE; PERFORMANCE AB A variety of studies have shown an effect of estrogen on dopamine function and suggest that estrogen may modulate central dopaminergic activity. Positron emission tomography (PET) and the dopamine metabolism tracer, [18F]6-fluoro-L-m-tyrosine (FMT) were used to evaluate dopaminergic function in the frontal cortex and striatum in six aged, but pre-menopausal, female monkeys before and after ovariectomy (OVX). Dynamic PET brain uptake data and metabolite-corrected blood input functions were fit to a three-compartment model for FMT uptake. Prior to OVX, all animals showed preferential accumulation of the tracer bilaterally in the striatum and less but measurable activity in the frontal cortex. Paired comparisons showed that there were no significant differences in FMT uptake (K-i) in either brain region before and after OVX, In addition, FMT uptake did not differ from a group of young adult female monkeys at either time point. These findings may represent a compensatory up-regulation of aromatic L- amino acid decarboxylase (AADC) activity. (C) 2002 Elsevier Science Inc. All rights reserved. C1 Univ Calif Davis, Dept Neurol, Davis, CA 94618 USA. Univ Calif Davis, Ctr Neurosci, Davis, CA 94618 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Funct Imaging, Berkeley, CA 94720 USA. Univ Calif Davis, Calif Reg Primate Res Ctr, Davis, CA 94618 USA. Univ Calif Davis, Dept Psychiat, Davis, CA 94618 USA. Napa State Hosp, Napa, CA 94558 USA. RP Eberling, JL (reprint author), Univ Calif Davis, Dept Neurol, Davis, CA 94618 USA. RI Nordahl, Thomas/J-7643-2013 OI Nordahl, Thomas/0000-0002-8627-0356 FU NIA NIH HHS [AG 16765] NR 32 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0197-4580 J9 NEUROBIOL AGING JI Neurobiol. Aging PD MAY-JUN PY 2002 VL 23 IS 3 BP 479 EP 483 AR PII S0197-4580(01)00323-2 DI 10.1016/S0197-4580(01)00323-2 PG 5 WC Geriatrics & Gerontology; Neurosciences SC Geriatrics & Gerontology; Neurosciences & Neurology GA 544TA UT WOS:000175175600017 PM 11959410 ER PT J AU Lacy, M Ridgway, S Trentham, N AF Lacy, M Ridgway, S Trentham, N TI The importance of radio sources in accounting for the highest mass black holes SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT International Workshop on Life Cycles of Radio Galaxies CY JUL 15-17, 1999 CL SPACE TELESCOPE SCI INST, BALTIMORE, MARYLAND HO SPACE TELESCOPE SCI INST DE galaxies : active; galaxies : elliptical; galaxies : evolution : quasars ID LUMINOSITY FUNCTION; QUASARS; LOUD AB The most massive black holes lie in the most massive elliptical galaxies, and at low-z all radio-loud AGNs lie in giant ellipticals. This strongly suggests a link between radio-loudness and black hole mass. We argue that the increase in the radio-loud fraction with AGN luminosity in optically-selected quasar samples is consistent with this picture. We also use the ratio of black holes today to quasars at z similar to 2 to conclude that the most bolometrically-luminous AGN, either radio-loud or radio quiet, are constrained to have lifetimes less than or similar to10(8) yr. If radio sources are associated with black holes of greater than or similar to 10(9) M-circle dot at all redshifts, then the same lifetime constraint applies to all radio sources with luminosities above L-5GHz similar to 10(24) WHz(-1) sr(-1). (C) 2002 Elsevier Science B.V. All rights reserved. C1 NAPL, Oxford OX1 3RH, England. Johns Hopkins Univ, Bloomberg Ctr Phys & Astron, Baltimore, MD 21218 USA. Inst Astron, Cambridge CB3 0HA, England. RP Lacy, M (reprint author), Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94550 USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1387-6473 J9 NEW ASTRON REV JI New Astron. Rev. PD MAY PY 2002 VL 46 IS 2-7 BP 211 EP 214 AR PII S1387-6473(01)00182-8 DI 10.1016/S1387-6473(01)00182-8 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 554CX UT WOS:000175717000028 ER PT J AU Geist, DR Brown, RS Lepla, K Chandler, J AF Geist, DR Brown, RS Lepla, K Chandler, J TI Practical application of electromyogram radiotelemetry: The suitability of applying laboratory-acquired calibration data to field data SO NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT LA English DT Article ID TROUT ONCORHYNCHUS-MYKISS; ADULT SOCKEYE-SALMON; DIFFICULT PASSAGE; SWIMMING ACTIVITY; LAKE TROUT; ENERGY USE; TELEMETRY; EXPENDITURE; SIGNALS; SPEEDS AB One of the practical problems with quantifying the amount of energy used by fish implanted with electromyogram (EMG) radio transmitters is that the signals emitted by the transmitters provide only a relative index of activity unless they are calibrated to the swimming speed of the fish. Ideally, calibration would be conducted for each fish before it is released, but this is often not possible. Consequently, calibration curves derived from more than one fish are used to interpret EMG signals from individuals that have not been calibrated. We tested the validity of this approach by comparing EMG data within three groups of three wild juvenile white sturgeon Acipenser transmontanus implanted with the same EMG radio transmitter. We also tested an additional six fish that were implanted with separate EMG transmitters. Within each group, a single EMG radio transmitter usually did not produce similar results in different fish. Grouping EMG signals among fish produced less accurate results than having individual EMG-swim speed relationships for each fish. It is unknown whether these differences resulted from different swimming performances among individual fish or from inconsistencies in the placement or function of the EMG transmitters. In either case, our results suggest that caution should be used when applying calibration curves from one group of fish to another group of uncalibrated fish. C1 Pacific NW Natl Lab, Ecol Grp, Richland, WA 99352 USA. Idaho Power Co, Boise, ID 83707 USA. RP Geist, DR (reprint author), Pacific NW Natl Lab, Ecol Grp, POB 999,MSIN K6-85, Richland, WA 99352 USA. NR 15 TC 21 Z9 21 U1 0 U2 7 PU AMER FISHERIES SOC PI BETHESDA PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 USA SN 0275-5947 J9 N AM J FISH MANAGE JI North Am. J. Fish Manage. PD MAY PY 2002 VL 22 IS 2 BP 474 EP 479 DI 10.1577/1548-8675(2002)022<0474:PAOERT>2.0.CO;2 PG 6 WC Fisheries SC Fisheries GA 556VL UT WOS:000175869600009 ER PT J AU Ding, XT Liu, Y Guo, GC Wang, EY Wong, KL Yan, LW Dong, JQ Cao, JY Zhou, Y Rao, J Yuan, Y Xia, H Liu, Y AF Ding, XT Liu, Y Guo, GC Wang, EY Wong, KL Yan, LW Dong, JQ Cao, JY Zhou, Y Rao, J Yuan, Y Xia, H Liu, Y CA HL-1M Grp TI Observation of internal kink instability purely driven by suprathermal electrons in the HL-1M tokamak SO NUCLEAR FUSION LA English DT Article ID CYCLOTRON CURRENT DRIVE; DIII-D TOKAMAK; MODES; GENERATION; WAVES AB Strong m = 1 MHD activities are observed in the HL-1M tokamak during off-axis electron cyclotron resonance heating (ECRH) when the cyclotron resonance location is placed just outside the q = 1 surface at the high-magnetic-field side of the magnetic surface. Addition of lower-hybrid waves to ECRH significantly enhances the MHD excitation, but lower-hybrid waves alone cannot excite or sustain the mode. This result is a clear demonstration of the suprathermal trapped electron effect on the instability because of the absence of energetic ions in the plasma. C1 SW Inst Phys, Chengdu 610041, Sichuan, Peoples R China. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Ding, XT (reprint author), SW Inst Phys, Chengdu 610041, Sichuan, Peoples R China. RI Xia, Hua/A-2938-2011 OI Xia, Hua/0000-0002-3912-4727 NR 14 TC 40 Z9 43 U1 1 U2 10 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 MAY PY 2002 VL 42 IS 5 BP 491 EP 495 AR PII S0029-5515(02)35742-9 DI 10.1088/0029-5515/42/5/301 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 566LP UT WOS:000176429800001 ER PT J AU Groth, M Andrew, P Fundamenski, W Guo, HY Hillis, DL Hogan, JT Horton, LD Matthews, GF Meigs, AG Morgan, PD Stamp, MF Stork, D von Hellermann, M AF Groth, M Andrew, P Fundamenski, W Guo, HY Hillis, DL Hogan, JT Horton, LD Matthews, GF Meigs, AG Morgan, PD Stamp, MF Stork, D von Hellermann, M TI Helium and neon enrichment studies in the JET mark IIAP and mark IIGB divertors SO NUCLEAR FUSION LA English DT Article ID SCRAPE-OFF LAYER; PLASMA PERFORMANCE; DIII-D; EXHAUST; FLOW; GEOMETRY; TOKAMAK AB Adequate helium enrichment and exhaust have been achieved in reactor relevant ELMy H mode plasmas in JET performed in the Mark II divertor geometry. These quantities, describing the retention of impurities in divertors, have been experimentally inferred from CXRS measurements in the core plasma, and from a spectroscopic analysis of a Penning gauge discharge in the exhaust gas. The retention of helium was found to be sufficient with respect to the requirements in a next step device, with helium enrichment factors exceeding 0.1 in high density ELMy H mode discharges. With increasing core plasma density the helium partial pressure in the exhaust channel increases. While in L mode plasmas the helium enrichment decreases with increasing core plasma density, it remains almost constant in ELMy H mode plasma. The noble gas neon is better enriched in the divertor at high core plasma densities in both confinement regimes. These experimental results can be explained by the significant differences between the penetration depths of the impurity neutrals and by their subsequent different impurity transport mechanisms. Analytical and numerical analyses of these plasmas using the impurity code package DIVIMP/NIMBUS support the proposition that, owing to their much longer ionization mean free path, helium particles can escape from the divertor chamber as neutrals, while neon escapes by means of ion leakage. Consequently, the divertor plasma conditions strongly influence the noble gas compression and enrichment. Variations of the divertor plasma configuration and modifications to the divertor geometry have enhanced the pumping capabilities of the tokamak, but have been found not to affect the helium enrichment. C1 EURATOM, UKAEA Fus Assoc, Abingdon, Oxon, England. Univ Manchester, Manchester, Lancs, England. Univ Washington, Redmond Plasma Phys Lab, Redmond, WA USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany. FOM, Inst Plasma Phys, Nieuwegein, Netherlands. RP Groth, M (reprint author), EURATOM, UKAEA Fus Assoc, Abingdon, Oxon, England. EM groth@fusion.gat.com RI Groth, Mathias/G-2227-2013 NR 29 TC 9 Z9 9 U1 3 U2 4 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 MAY PY 2002 VL 42 IS 5 BP 591 EP 600 AR PII S0029-5515(02)36318-X DI 10.1088/0029-5515/42/5/311 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 566LP UT WOS:000176429800011 ER PT J AU Benson, SV AF Benson, SV TI What have we learned from the kilowatt IR-FEL at Jefferson lab? SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE high power; mirror distortion; power scaling ID FREE-ELECTRON LASER AB Recent work at Jefferson Lab has demonstrated the concept of same cell energy recovery to attain high average power in a free-electron laser. Since this device was the first of its kind, we learned a great deal about how to design such systems as we learned to operate the prototype. We are in the process of building a laser with an average power in excess of 10 kW in the infrared and have point designs for even higher power. This work will summarize the problems which were thought to exist before the IR Demo based and what we have learned since the laser operated successfully. The upgrade has its own challenges and these will be described along with the proposed solutions. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Thomas Jefferson Natl Accelerator Facil, Lab MS 6A, Newport News, VA 23606 USA. RP Benson, SV (reprint author), Thomas Jefferson Natl Accelerator Facil, Lab MS 6A, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 17 TC 11 Z9 11 U1 1 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 1 EP 7 AR PII S0168-9002(02)00276-0 DI 10.1016/S0168-9002(02)00276-0 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000003 ER PT J AU Neil, GR AF Neil, GR TI Trends and opportunities in light source development SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free electron laser; light sources ID FREE-ELECTRON LASER; GENERATION; RADIATION; DYNAMICS AB After a decade of rather quiet growth for FELs there is now a lot of activity in the light-source community. This is the result of a combination of factors including successful operation of the third-generation light sources, the establishment of a very productive user community at both synchrotrons and FELs, and the continuing technical improvements of accelerators and related technology which allow even more challenging machines to be considered. There are a number of themes that carry this development including pushing wavelengths shorter, brightnesses higher, pulses shorter increasing average power, and providing for multiple synchronized photon beams with multiple wavelengths. This talk will discuss some of the plans and proposals currently circulating and attempt to provide a glimpse into the near future of our field by illustrating the technologies that drive source development. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Thomas Jefferson Natl Accelerator Facil, Jefferson Lab, Newport News, VA 23606 USA. RP Neil, GR (reprint author), Thomas Jefferson Natl Accelerator Facil, Jefferson Lab, 12000 Jefferson Ave,MS 6A, Newport News, VA 23606 USA. NR 29 TC 5 Z9 5 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 14 EP 20 AR PII S0168-9002(02)00278-4 DI 10.1016/S0168-9002(02)00278-4 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000005 ER PT J AU Tremaine, A Frigola, P Murokh, A Pellegrini, C Reiche, S Rosenzweig, J Babzien, M Ben-Zvi, I Johnson, E Malone, R Rakowsky, G Skaritka, J Wang, XJ Van Bibber, KA Bertolini, L Hill, JM Le Sage, GP Libkind, M Toor, A Carr, R Cornacchia, M Klaisner, L Nuhn, HD Ruland, R AF Tremaine, A Frigola, P Murokh, A Pellegrini, C Reiche, S Rosenzweig, J Babzien, M Ben-Zvi, I Johnson, E Malone, R Rakowsky, G Skaritka, J Wang, XJ Van Bibber, KA Bertolini, L Hill, JM Le Sage, GP Libkind, M Toor, A Carr, R Cornacchia, M Klaisner, L Nuhn, HD Ruland, R TI Characterization of an 800 nm SASE FEL at saturation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE SASE; FEL; saturation; strong focusing; undulator ID AMPLIFIED SPONTANEOUS-EMISSION; FREE-ELECTRON LASER AB Visible to Infrared SASE Amplifier is a free electron laser (FEL) designed to saturate at a radiation wavelength of 800nm within a 4m long, strong focusing undulator. Large gain is achieved by driving the FEL with 72 MeV high brightness beam of BNL's accelerator test facility. We present measurements that demonstrate saturation in addition to the frequency spectrum of the FEL radiation. Energy, gain length and spectral characteristics are compared and shown to agree with simulation and theoretical predictions. (C) 2002 Published by Elsevier Science B.V. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. SLAC, Berkeley, CA 94720 USA. RP Tremaine, A (reprint author), Brookhaven Natl Lab, Bldg 725,Brookhaven Ave, Upton, NY 11973 USA. NR 16 TC 14 Z9 14 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 24 EP 28 AR PII S0168-9002(02)00280-2 DI 10.1016/S0168-9002(02)00280-2 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000007 ER PT J AU Lewellen, JW Milton, SV Gluskin, E Arnold, ND Benson, C Berg, W Biedron, SG Borland, M Chae, YC Dejus, RJ Den Hartog, PK Deriy, B Erdmann, M Eidelman, YI Hahne, MW Huang, Z Kim, KJ Li, Y Lumpkin, AH Makarov, O Moog, ER Nassiri, A Sajaev, V Soliday, R Tieman, BJ Trakhtenberg, EM Vasserman, IB Vinokurov, NA Wiemerslage, G Yang, BX AF Lewellen, JW Milton, SV Gluskin, E Arnold, ND Benson, C Berg, W Biedron, SG Borland, M Chae, YC Dejus, RJ Den Hartog, PK Deriy, B Erdmann, M Eidelman, YI Hahne, MW Huang, Z Kim, KJ Li, Y Lumpkin, AH Makarov, O Moog, ER Nassiri, A Sajaev, V Soliday, R Tieman, BJ Trakhtenberg, EM Vasserman, IB Vinokurov, NA Wiemerslage, G Yang, BX TI Present status and recent results from the APS SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE SASE; FEL; saturation AB The Low-Energy Undulator Test Line (LEUTL) at the Advanced Photon Source, Argonne National Laboratory, is intended to demonstrate the basic operation of a SASE-based free-electron laser. Goals include comparison of experimental results With theoretical predictions and scaling laws, identification of problems relevant to fourth-generation light source construction and operation and the means of addressing them, the development of operational and diagnostic techniques to optimize SASE FEL performance and increase repeatability from run to run. and performance of initial pioneering experiments capable of exploiting the unique properties of the laser. The basic layout and operational philosophy of the LEUTL experiment is presented. A summary of past results, including saturation, is reviewed, and a description of recent results is presented. We conclude with future plans, which include pressing to shorter wavelengths and incorporating user experiments into the LEUTL experimental program. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Lund Univ, Max Lab, S-22100 Lund, Sweden. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. RP Lewellen, JW (reprint author), Argonne Natl Lab, Adv Photon Source, 401-B2207,9700 S Cass Ave, Argonne, IL 60439 USA. NR 5 TC 7 Z9 7 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 40 EP 45 AR PII S0168-9002(02)00283-8 DI 10.1016/S0168-9002(02)00283-8 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000010 ER PT J AU Krinsky, S Gluckstern, RL AF Krinsky, S Gluckstern, RL TI Statistical correlations and intensity spiking in the SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE self-amplified spontaneous emission; statistical analysis; joint probability distributions; intensity peaks ID FREE-ELECTRON-LASER; AMPLIFIED SPONTANEOUS EMISSION; TRANSIENT ANALYSIS; GAIN; FLUCTUATIONS; AMPLIFICATION; RADIATION; REGIME; NOISE; NM AB in the linear regime before saturation, we describe the statistical correlations in the narrow band chaotic output of the self-amplified spontaneous emission free-electron laser. At a fixed position along the undulator axis, we derive joint probability distributions for the intensity in the output pulse to have values I-1 and I-2 at times t(1) and t(2) and for the spectral intensity to have values (I) over tilde (1) and (I) over tilde (2) at frequencies omega(1) and omega(2). Probability distributions for the peak values of intensity in the time and frequency domains are also determined. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. RP Krinsky, S (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Bldg 725B, Upton, NY 11973 USA. NR 26 TC 8 Z9 8 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 57 EP 61 AR PII S0168-9002(02)00286-3 DI 10.1016/S0168-9002(02)00286-3 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000013 ER PT J AU Reiche, S Pellegrini, C Rosenzweig, J Emma, P Krejcik, P AF Reiche, S Pellegrini, C Rosenzweig, J Emma, P Krejcik, P TI Start-to-end simulation for the LCLS X-ray FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE FEL; LCLS; X-rays; simulation ID AMPLIFIED SPONTANEOUS-EMISSION; FREE-ELECTRON LASER; HIGH-GAIN AB X-ray FELs, such as the LCLS and TESLA FEL, require electron beams with large peak current and very small emittance. The X-ray peak power, temporal and spectral properties, depend significantly on details of the electron beam phase space distribution. The electron beam distribution is determined by many effects, as the emission process at the gun photo-cathode, bunch compression, acceleration and wakefields within the undulator. Although analytical results can give an estimate of the expected performance, the complexity of the electron beam generation, acceleration and compression can only be evaluated using a numerical simulation of all these processes, a start-to-end simulation. In this presentation we discuss the LCLS X-Ray FEL performance estimated by a start-to-end simulation, and we compare the results with those obtained using a simpler model. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Stanford Linear Accelerator Lab, Los Angeles, CA USA. RP Reiche, S (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90095 USA. NR 19 TC 19 Z9 19 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 70 EP 74 AR PII S0168-9002(02)00288-7 DI 10.1016/S0168-9002(02)00288-7 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000015 ER PT J AU Schroeder, CB Pellegrini, C Reiche, S Arthur, J Emma, P AF Schroeder, CB Pellegrini, C Reiche, S Arthur, J Emma, P TI Chirped-beam two-stage SASE-FEL for high power femtosecond X-ray pulse generation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron laser; X-ray; femtosecond AB A method for generating femtosecond duration X-ray pulses using a single-pass free-electron laser (FEL) is presented. This method uses an energy-chirped electron beam propagating through an undulator to produce a frequency-chirped X-ray pulse through self-amplified spontaneous emission (SASE). After the undulator, we consider passing the radiation through a monochromator. The frequency is correlated to the longitudinal position within the pulse; therefore, by selecting a narrow bandwidth, a short temporal pulse will be transmitted. The short pulse radiation is used to seed a second undulator, where the radiation is amplified to saturation. In addition to short pulse generation, this scheme has the ability to control shot-to-shot fluctuations in the central wavelength due to electron beam energy jitter. We present calculations of the radiation characteristics produced by a chirped-beam two-stage SASE-FEL, and consider the performance of the chirped-beam two-stage option for the Linac Coherent Light Source. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Schroeder, CB (reprint author), Stanford Linear Accelerator Ctr, SLAC MS 99,2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. OI Schroeder, Carl/0000-0002-9610-0166 NR 4 TC 18 Z9 18 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 89 EP 93 AR PII S0168-9002(02)00291-7 DI 10.1016/S0168-9002(02)00291-7 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000018 ER PT J AU Biedron, SG Dejus, RJ Huang, Z Milton, SV Sajaev, V Berg, W Borland, M Den Hartog, PK Erdmann, M Fawley, WM Freund, HP Gluskin, E Kim, KJ Lewellen, JW Li, Y Lumpkin, AH Moog, ER Nassiri, A Wiemerslage, G Yang, BX AF Biedron, SG Dejus, RJ Huang, Z Milton, SV Sajaev, V Berg, W Borland, M Den Hartog, PK Erdmann, M Fawley, WM Freund, HP Gluskin, E Kim, KJ Lewellen, JW Li, Y Lumpkin, AH Moog, ER Nassiri, A Wiemerslage, G Yang, BX TI Measurements of nonlinear harmonic generation at the Advanced Photon Source's SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutsch Forsch Gemeinschaft, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron lasers; harmonic generation; frequency conversion; intense particle beams and radiation sources ID FREE-ELECTRON LASERS; AMPLIFIED SPONTANEOUS EMISSION; DESIGN CONSIDERATIONS; GAIN; SATURATION AB SASE saturation was recently achieved at the Advanced Photon Source's SASE FFL in the low-energy undulator test line at 530 nm and 385 urn. The electron beam microbunching becomes more and more prominent until saturation is achieved. This bunching causes nonlinear harmonic emission that extends the usefulness of a SASE system in achieving shorter FEL wavelengths for the same electron beam energy. We have investigated the intensity of the fundamental and second harmonic undulator radiation as a function of distance along the undulator line and present the experimental results and compare them to numerical simulations. In addition, we have measured the single-shot second harmonic spectra as well as the simultaneous fundamental and second harmonic spectra and present the experimental results. (C) 2002 Elsevier Science B.V. All riudits reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Lund Univ, Max Lab, SE-22100 Lund, Sweden. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. RP Biedron, SG (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. EM biedron@aps.anl.gov NR 18 TC 22 Z9 22 U1 0 U2 3 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 94 EP 100 AR PII S0168-9002(02)00430-8 DI 10.1016/S0168-9002(02)00430-8 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000019 ER PT J AU Biedron, SG Huang, ZR Kim, KJ Milton, S Dattoli, G Ottaviani, PL Renieri, A Fawley, WM Freund, HP Nuhn, HD AF Biedron, SG Huang, ZR Kim, KJ Milton, S Dattoli, G Ottaviani, PL Renieri, A Fawley, WM Freund, HP Nuhn, HD TI The sensitivity of nonlinear harmonic generation to electron beam quality in free electron lasers SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron lasers; harmonic generation; frequency conversion; intense particle beams and radiation sources ID HIGH-GAIN; DESIGN CONSIDERATIONS; FEL; SIMULATION; WIGGLERS AB The generation of harmonics through a nonlinear mechanism driven by bunching at the fundamental has sparked interest as a path toward enhancing and extending the usefulness of an X-ray free-electron laser (FEL) facility. The sensitivity of the nonlinear harmonic generation to undulator imperfections, electron beam energy spread, peak current, and emittance is important in an evaluation of the process. Typically, linear instabilities in FELs are characterized by increased sensitivity to both electron beam and undulator quality with increasing harmonic number. However, since the nonlinear harmonic generation mechanism is driven by the growth of the fundamental, the sensitivity of the nonlinear harmonic mechanism is not expected to be significantly greater than that of the fundamental. In this paper, we study the effects of electron beam quality, more specifically, emittance, energy spread, and peak current, on the nonlinear harmonics in a 1.5-Angstrom FEL, and show that the decline in the harmonic emission roughly follows that of the fundamental. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Lund Univ, Max Lab, SE-22100 Lund, Sweden. Ctr Ric Frascati, ENEA, Div Fis Applicata, I-00044 Frascati, Italy. Ctr Ric E Clementel, ENEA, Div Fis Applicata, Bologna, Italy. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Biedron, SG (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 26 TC 8 Z9 8 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 101 EP 106 AR PII S0168-9002(02)00292-9 DI 10.1016/S0168-9002(02)00292-9 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000020 ER PT J AU Merminga, L AF Merminga, L TI RF stability in energy recovering free electron lasers: theory and experiment SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE energy recovery; recirculating linacs; instabilities; free electron lasers; radio frequency; superconductivity AB Phenomena that result from the interaction of the beam with the RF fields in superconducting cavities, and can potentially limit the performance of high average power Energy Recovering Free Electron Lasers (FELs), are reviewed. These phenomena include transverse and longitudinal multipass, multibunch beam breakup, longitudinal beam-loading type of instabilities and their interaction with the FEL, Higher Order Mode power dissipation and RF control issues. We present experimental data obtained at the Jefferson Lab IR FEL with average current up to 5 mA, compare with analytic calculations and simulations and extrapolate the performance of Energy Recovering FELs to much higher average currents, up to similar to 100 mA. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Merminga, L (reprint author), Thomas Jefferson Natl Accelerator Facil, 12000 Jefferson Ave,MS 6A, Newport News, VA 23606 USA. NR 19 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 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 1 PY 2002 VL 483 IS 1-2 BP 107 EP 112 AR PII S0168-9002(02)00293-0 DI 10.1016/S0168-9002(02)00293-0 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000021 ER PT J AU Neil, GR Benson, SV Biallas, G Freund, HP Gubeli, J Jordan, K Myers, S Shinn, MD AF Neil, GR Benson, SV Biallas, G Freund, HP Gubeli, J Jordan, K Myers, S Shinn, MD TI Second harmonic FEL oscillation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free electron laser; oscillation ID FREE-ELECTRON-LASER; GENERATION AB We have produced and measured for the first time second harmonic oscillation in the infrared region by the high-average-power Jefferson Lab Infrared Free Electron Laser. The finite geometry and beam emittance allows sufficient gain for lasing to occur. We were able to lase at pulse rates up to 74.85 MHz and could produce over 4.5 W average and 40kW peak of IR power in a 40nm FWHM bandwidth at 2925nm. In agreement with predictions, the source preferentially lased in a TEM01 mode. We present results of initial source performance measurements and comparisons with theory and simulation. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Natl Accelerator Facil, Jefferson Lab, Newport News, VA 23606 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. RP Neil, GR (reprint author), Natl Accelerator Facil, Jefferson Lab, 12000 Jefferson Ave,MS 6A, Newport News, VA 23606 USA. NR 11 TC 1 Z9 1 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 119 EP 124 AR PII S0168-9002(02)00295-4 DI 10.1016/S0168-9002(02)00295-4 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000023 ER PT J AU Blau, J Bouras, V Colson, WB Polykandriotis, K Kalfoutzos, A Benson, SV Neil, GR AF Blau, J Bouras, V Colson, WB Polykandriotis, K Kalfoutzos, A Benson, SV Neil, GR TI Simulations of the 100 kW TJNAF FEL using a step-tapered undulator SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron-laser ID 2-COLOR OPERATION AB The Thomas Jefferson National Accelerator Facility (TJNAF) free electron laser (FEL) can be upgraded to operate at 100 kW average power in the near future using a configuration that recirculates the electron beam to recover energy. It is important to extract the maximum energy from the electron beam in a pass through the undulator while inducing the minimum amount of exhaust energy spread. A larger energy extraction reduces the requirement for a large recirculating current, while a smaller exhaust energy spread allows the intense electron beam to be recirculated Without damaging components. To improve FEL performance, we explore the use of the step-tapered undulator, which alters the resonance condition halfway through the undulator. Short Pulses complicate the desired interaction. Comparisons are made to the conventional periodic and linearly-tapered undulators. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA. Thomas Jefferson Natl Accelerator Facil, Free Electron Laser Dept, Newport News, VA 23606 USA. RP Colson, WB (reprint author), USN, Postgrad Sch, Dept Phys, 833 Dyer Rd, Monterey, CA 93943 USA. NR 8 TC 2 Z9 2 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 138 EP 141 AR PII S0168-9002(02)00299-1 DI 10.1016/S0168-9002(02)00299-1 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000027 ER PT J AU Blau, J Campbell, T Colson, WB Ng, I Ossenfort, W Benson, SV Neil, GR Shinn, MD AF Blau, J Campbell, T Colson, WB Ng, I Ossenfort, W Benson, SV Neil, GR Shinn, MD TI Simulations of the 100 kW TJNAF FEL using a short Rayleigh length SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron laser AB The TJNAF FEL can be upgraded to operate at 100 kW average power and then explore the use of a short Rayleigh length in order to reduce the power density on the resonator mirrors. The short Rayleigh length can only work with a relatively short undulator. Multimode simulations are used to self-consistently model the optical mode interaction with the electron beam. The steady-state resonator mode is affected by the complex, non-linear electron beam evolution as well as the resonator design. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA. Thomas Jefferson Natl Accelerator Facil, Free Electron Laser Dept, Newport News, VA 23606 USA. RP Colson, WB (reprint author), USN, Postgrad Sch, Dept Phys, 833 Dyer Rd, Monterey, CA 93943 USA. NR 4 TC 4 Z9 4 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 142 EP 145 AR PII S0168-9002(02)00300-5 DI 10.1016/S0168-9002(02)00300-5 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000028 ER PT J AU Militsyn, BL Bongers, WA Bratman, VL Caplan, M Denisov, GG van der Geer, CAJ Manintveld, P Oomens, AAM Plomp, J Pluygers, J Poelman, AJ Riet, M Savilov, AV Smeets, PHM Tito, CJ Turk, GHB Varfolomeev, AA Urbanus, WH AF Militsyn, BL Bongers, WA Bratman, VL Caplan, M Denisov, GG van der Geer, CAJ Manintveld, P Oomens, AAM Plomp, J Pluygers, J Poelman, AJ Riet, M Savilov, AV Smeets, PHM Tito, CJ Turk, GHB Varfolomeev, AA Urbanus, WH TI First lasing of the Dutch fusion-FEM in the long-pulse configuration SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron maser; energy recovery; depressed collector ID FREE-ELECTRON MASER; HIGH-POWER AB The Dutch Fusion-FEM is the prototype of a high-power, long-pulse, rapid-tunable free-electron maser. The target is to generate mm-wave power in a frequency range of 130-260 GHz, e.g. for tokamak heating and diagnostics experiments in fusion devices. For these applications a high system efficiency is needed. The electron beam is first DC-accelerated to the FEL interaction region. The unused electron beam energy is recovered by a DC-decelerator and a three-stage depressed collector. In short-pulse regime, without energy recovery system, 730 M, 200 GHz of net output power was generated. Single-frequency operation and tunability have been demonstrated. In the present set-up, with the energy recovery system being operational, initial experiments showed a net output power of I 10 kW on average and 140 kW peak power at a pulse length of 40 Vs. During the full-pulse length, a stable-frequency operation around 170 GHz has been observed. (C) 2002 Elsevier Science B.V. All rights reserved. C1 EURATOM, FOM, Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands. Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603600, Russia. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123182, Russia. RP Militsyn, BL (reprint author), EURATOM, FOM, Inst Plasma Phys Rijnhuizen, Trilateral Euregio Cluster,POB 1207, NL-3430 BE Nieuwegein, Netherlands. NR 5 TC 1 Z9 1 U1 0 U2 2 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 259 EP 262 AR PII S0168-9002(02)00323-6 DI 10.1016/S0168-9002(02)00323-6 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000051 ER PT J AU Borland, M Chae, YC Emma, P Lewellen, JW Bharadwaj, V Fawley, WM Krejcik, P Limborg, C Milton, SV Nuhn, HD Soliday, R Woodley, M AF Borland, M Chae, YC Emma, P Lewellen, JW Bharadwaj, V Fawley, WM Krejcik, P Limborg, C Milton, SV Nuhn, HD Soliday, R Woodley, M TI Start-to-end simulation of self-amplified spontaneous emission free electron lasers from the gun through the undulator SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron laser; integrated accelerator modeling; accelerator stability modeling AB It is widely appreciated that the performance of self-amplified spontaneous emission free-electron lasers (FELs) depends critically on the properties of the drive beam. In view of this, a multi-laboratory collaboration has explored methods and software tools for integrated simulation of the photoinjector, linear accelerator, bunch compressor, and FEL. Rather than create a single code to handle such a system, Our goal has been a robust. generic solution wherein preexisting simulation codes are used sequentially. We have standardized on the use of Argonne National Laboratory's Self-Describing Data Sets file protocol for transfer of data among codes. The simulation codes used are PARMELA, elegant, and GENESIS. We describe the software methodology and its advantages, then provide examples involving Argonne's Low-Energy Undulator Test Line and Stanford Linear Accelerator Center's Linac Coherent Light Source. We also indicate possible future direction of this work. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Accelerator Syst Div, Argonne, IL 60439 USA. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Borland, M (reprint author), Argonne Natl Lab, Accelerator Syst Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 18 TC 76 Z9 76 U1 1 U2 9 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 268 EP 272 AR PII S0168-9002(02)00325-X DI 10.1016/S0168-9002(02)00325-X PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000053 ER PT J AU Yakimenko, V Babzien, M Ben-Zvi, I Malone, R Wang, XJ AF Yakimenko, V Babzien, M Ben-Zvi, I Malone, R Wang, XJ TI Submicron emittance and ultra small beam size measurements at ATF SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron laser AB This paper covers improvements to a photoinjector that lead to the realization and measurement of submicron normalized emittance for a 0.5 nC electron beam at the Brookhaven Accelerator Test Facility. A fitting procedure utilizing beam size measurements from multiple beam profile monitors along the transport line was used instead of more traditional techniques. Such a small emittance beam in combination with a tight focusing scheme allowed us to achieve 10 mum RMS beam sizes at 60 MeV. The behavior and limitations of different BPM screens is compared for such beams. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Yakimenko, V (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 4 TC 7 Z9 7 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 277 EP 281 AR PII S0168-9002(02)00327-3 DI 10.1016/S0168-9002(02)00327-3 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000055 ER PT J AU Bolton, PR Clendenin, JE Dowell, DH Ferrario, M Fisher, AS Gierman, SM Kirby, RE Krejcik, P Limborg, CG Mulhollan, GA Nguyen, D Palmer, DT Rosenzweig, JB Schmerge, JF Serafini, L Wang, XJ AF Bolton, PR Clendenin, JE Dowell, DH Ferrario, M Fisher, AS Gierman, SM Kirby, RE Krejcik, P Limborg, CG Mulhollan, GA Nguyen, D Palmer, DT Rosenzweig, JB Schmerge, JF Serafini, L Wang, XJ TI Photoinjector design for the LCLs SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE photoinjectors; low emittance; free electron lasers ID GUN AB The design of the Linac Coherent Light Source assumes that a low-emittance, 1 nC, 10 ps beam will be available for injection nto the 15 GeV finac. The proposed rf photocathode injector that will meet this requirement is based on a 1.6cell S-band rf gun equipped with an emittance-compensating solenoid. The booster accelerator with a gradient of 25 MV/m is positioned at the beam waist coinciding with the first emittance maximum, i.e., the "new working point." The uv pulses required for cathode excitation will be generated by tripling the output of a Ti:sapphire laser system. Details of the design and the supporting simulations are presented. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Roma, Italy. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Ist Nazl Fis Nucl, MI, I-20133 Milan, Italy. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Clendenin, JE (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, POB 4349,MS 18, Stanford, CA 94309 USA. NR 13 TC 3 Z9 3 U1 0 U2 3 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 296 EP 300 AR PII S0168-9002(02)00331-5 DI 10.1016/S0168-9002(02)00331-5 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000059 ER PT J AU Schmerge, JF Bolton, PR Clendenin, JE Decker, FJ Dowell, DH Gierman, SM Limborg, CG Murphy, BF AF Schmerge, JF Bolton, PR Clendenin, JE Decker, FJ Dowell, DH Gierman, SM Limborg, CG Murphy, BF TI Transverse-emittance measurements on an S-band photocathode RF electron gun SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE photoinjectors; low emittance; free electron lasers AB Proposed fourth-generation light sources using SASE FELs to generate short pulse, coherent, X-rays require demonstration of high brightness electron sources. The gun test facility at SLAC was built to test high brightness sources for the proposed linac coherent light source at SLAC. The transverse-emittance measurements are made at nearly 30 MeV by measuring the spot size on a YAG screen using the quadrupole scan technique. The emittance was measured to vary from 1 to 3.5 mm mrad as the charge is increased from 50 to 350 pC using a laser pulse width of 2 ps FWHM. The measurements are in good agreement with simulation results using the LANL version of PARMELA. (C) 2002 Elsevier Science B.V. All rights reserved. C1 SLAC, Menlo Pk, CA 94025 USA. RP Schmerge, JF (reprint author), SLAC, 2575 Sand Hill Rd,MS 69, Menlo Pk, CA 94025 USA. NR 7 TC 12 Z9 12 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 301 EP 304 AR PII S0168-9002(02)00332-7 DI 10.1016/S0168-9002(02)00332-7 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000060 ER PT J AU Cee, R Krassilnikov, M Setzer, S Weiland, T Novokhatski, A AF Cee, R Krassilnikov, M Setzer, S Weiland, T Novokhatski, A TI Detailed numerical studies of space charge effects in an FEL RF gun SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt AB The production of short bunches with low emittance is a key issue for the successful operation of an SASE-FEL as proposed by the TESLA collaboration (TESLA Technical design report, DESY 2001-011, Hamburg, 2001). In this paper we present the results of detailed MAFIA TS-2 (CST GmbH, Budinger Strasse 2a, D-64289 Darmstadt) simulations for the FEL RF-gun revealing the main physical effects leading to emittance growth. The simulations prove that the transverse emittance growth can mainly be observed close to the cathode area. This is caused by the non-linear space charge forces acting inside the bunch during the injection process. For the application of an emittance compensation scheme (Nucl. Instr. and Meth. 285 (1989) 313) the slice emittance is of significant importance. Therefore, a wide range of parameters for the photo cathode laser has been investigated in order to find an appropriate operation point. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Tech Univ Darmstadt, D-64289 Darmstadt, Germany. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Setzer, S (reprint author), Tech Univ Darmstadt, Schlossgartenstr 8, D-64289 Darmstadt, Germany. NR 3 TC 8 Z9 8 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 321 EP 325 AR PII S0168-9002(02)00336-4 DI 10.1016/S0168-9002(02)00336-4 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000064 ER PT J AU Wootton, A Arthur, J Barbee, T Bionta, R Jankowski, A London, R Ryutov, D Shepherd, R Shlyaptsev, V Tatchyn, R Toor, A AF Wootton, A Arthur, J Barbee, T Bionta, R Jankowski, A London, R Ryutov, D Shepherd, R Shlyaptsev, V Tatchyn, R Toor, A TI Research and development for X-ray optics and diagnostics on the linac coherent light source (LCLS) SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE X-ray optics; LCLS; fourth generation light source AB The Linac Coherent Light Source is a 1.5-15 Angstrom-wavelength free-electron laser (FEL), currently proposed for the Stanford Linear Accelerator Center. The photon output consists of high brightness, transversely coherent pulses with duration <300 fs, together with a broad spontaneous spectrum with total power comparable to the coherent output. The output fluence, and pulse duration, pose special challenges for optical component and diagnostic designs. We first discuss the specific requirements for the initial scientific experiments, and our proposed solutions. We then describe the supporting research and development program that includes: experimental and theoretical material damage studies; high-resolution multilayer design, fabrication, and testing; replicated closed-form optics design and manufacturing; BeB manufacturing; and low-Z Fresnel lens design, fabrication and testing. Finally, some novel concepts for optical components are presented. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Wootton, A (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. NR 11 TC 9 Z9 9 U1 1 U2 5 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 345 EP 350 AR PII S0168-9002(02)00341-8 DI 10.1016/S0168-9002(02)00341-8 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000069 ER PT J AU Vasserman, I Sasaki, S Dejus, R Moog, E Trakhtenberg, E Vinokurov, N AF Vasserman, I Sasaki, S Dejus, R Moog, E Trakhtenberg, E Vinokurov, N TI Measurement, sorting and tuning of LCLS undulator magnets SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE FEL; udulator AB Currently, a Linac Coherent Light Source (LCLS) prototype undulator is under construction. The prototype is a 3.4 m-long hybrid-type undulator with fixed gap of 6 mm. The period length is 30 turn and the number of poles is 226. For this undulator, 450 NdFeB magnet blocks are used. This project does not have demanding requirements for multipole component errors, but the field strength at x = 0 should be as precise as possible to provide proper particle steering and phase errors. The first set of magnetic blocks has been measured. The strength and direction of magnetization of the magnet blocks are measured using a Helmholtz coil system. In addition to this, Hall probe measurements are performed for magnet blocks while they are mounted in a specially designed cassette with vanadium-permendur poles. The magnet blocks will be sorted using these data to minimize errors. Computer simulations show that magnets may be sorted in decreasing strengths with little or no additional tuning of the undulators. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Expt Facil Div, Argonne, IL 60439 USA. RP Vasserman, I (reprint author), Argonne Natl Lab, Expt Facil Div, 9700 S Cass Ave,Bldg 401, Argonne, IL 60439 USA. NR 3 TC 5 Z9 5 U1 0 U2 2 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 383 EP 387 AR PII S0168-9002(02)00348-0 DI 10.1016/S0168-9002(02)00348-0 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000076 ER PT J AU Lumpkin, AH Dejus, R Lewellen, JW Berg, W Biedron, S Borland, M Chae, Y Erdmann, M Huang, Z Kim, KJ Li, Y Milton, SV Moog, E Rule, DW Sajaev, V Yang, BX AF Lumpkin, AH Dejus, R Lewellen, JW Berg, W Biedron, S Borland, M Chae, Y Erdmann, M Huang, Z Kim, KJ Li, Y Milton, SV Moog, E Rule, DW Sajaev, V Yang, BX TI Comprehensive z-dependent measurements of electron-beam microbunching using COTR in a saturated SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE SASE; FEL; electron beam; microbunching; coherent transition radiation ID OPTICAL-TRANSITION-RADIATION; LASER; DIAGNOSTICS AB We report the initial, comprehensive set of z-dependent measurements of electron-beam microbunching using coherent optical transition radiation (COTR) in a saturated self-amplified spontaneous emission (SASE) free-electron laser (FEL) experiment. In this case the FEL was operated near 530 nm using an enhanced facility including a bunch-compressed photocathode gun electron beam, linac, and 21.6 m of undulator length. The longitudinal microbunching was tracked by inserting a metal foil and mirror after each of the nine 2.4-m-long undulators and measuring the visible COTR spectra, intensity, angular, distribution, and spot size. We observed for the first time the z-dependent transition of the COTR spectra from simple lines to complex structure/sidebands near saturation. We also observed the change in the microbunching fraction after saturation, multiple fringes in the COTR interferogram that are consistent with involvement of a smaller core of the e-beam transverse distribution, and the second harmonic content of the microbunching. The results will be compared to relevant calculations using GENESIS and/or GINGER. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Lumpkin, AH (reprint author), Argonne Natl Lab, Adv Photon Source, Bldg 32,9700 S Cass Ave, Argonne, IL 60439 USA. NR 17 TC 1 Z9 1 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 394 EP 401 AR PII S0168-9002(02)00350-9 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000078 ER PT J AU Lumpkin, AH Berg, W Biedron, S Borland, M Dejus, R Erdmann, M Huang, Z Lewellen, JW Li, Y Milton, SV Moog, E Sajaev, V Yang, BX AF Lumpkin, AH Berg, W Biedron, S Borland, M Dejus, R Erdmann, M Huang, Z Lewellen, JW Li, Y Milton, SV Moog, E Sajaev, V Yang, BX TI First observations, of electron-beam microbunching in the deep ultraviolet at 265 nm using COTR in a SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE SASE; FEL; electron beam; microbunching; coherent transition radiation ID RADIATION AB We have recently extended our microbunching experiments in a self-amplified spontaneous emission free-electron laser using coherent optical transition radiation (COTR) to the deep ultraviolet wavelengths (265 nm) for the first time. These experiments were performed Lis a complement to the Advanced Photon Source SASE FEL project's thrust to shorter wavelengths. In order to do this, the optical diagnostics have been modified to include UV-sensitive cameras, and an optical transport has been installed that involves sets of mirrors and UV-visible lens pairs after each undulator. These optics provide transport to the in-tunnel Oriel UV-visible spectrometer. Since this is an imaging spectrometer, both spectral and x/y-plane spatial information are simultaneously available by performing the projections of the images on the x- and y-axis. The initial angular distribution data and beam size data have been obtained in a z-dependent manner by sampling after every other undulator, or every 4.8 m at four 7 locations. Experiments with sampling of the COTR angular distribution and spectra after each Of eight undulators are planned. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Lumpkin, AH (reprint author), Argonne Natl Lab, Adv Photon Source, Bldg 32,9700 S Cass Ave, Argonne, IL 60439 USA. NR 9 TC 3 Z9 3 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 402 EP 406 AR PII S0168-9002(02)00351-0 DI 10.1016/S0168-9002(02)00351-0 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000079 ER PT J AU Den Hartog, P Moog, E Benson, C Erdmann, M Lumpkin, A Makarov, O Petra, M Tieman, B Trakhtenberg, E Wiemerslage, G AF Den Hartog, P Moog, E Benson, C Erdmann, M Lumpkin, A Makarov, O Petra, M Tieman, B Trakhtenberg, E Wiemerslage, G TI UV-VUV diagnostics for the advanced photon source SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron; APS; FEL; laser; VUV; SASE ID AMPLIFIED SPONTANEOUS EMISSION; FREE-ELECTRON LASER; WAVELENGTH; RADIATION; NM AB The Advanced Photon Source self-amplified spontaneous emission (SASE) free-electron laser (FEL) uses diagnostics between undulator sections to characterize the light and the electron beam. These diagnostics enable z-dependent measurements of the exponential growth of the radiation and of the microbunching. The original diagnostics were designed for visible light. To enable measurements down to 265 run, UV-enhanced cameras and fused-silica lenses have been installed. We have now designed a diagnostics suite that will enable us to continue measurements down to 50 nm using reflective optics and back-illuminated CCD cameras operating in vacuum. We describe the enhancements to the diagnostics for operation in the UV and VUV. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Den Hartog, P (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Class Ave, Argonne, IL 60439 USA. NR 16 TC 2 Z9 2 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 407 EP 411 AR PII S0168-9002(02)00352-2 DI 10.1016/S0168-9002(02)00352-2 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000080 ER PT J AU Faatz, B Fateev, AA Feldhaus, J Gerth, C Hahn, U Jastrow, U Krzywinski, J Lebedev, NI Lewellen, J Malkinski, L Meschkat, M Petrov, VA Rossbach, J Rukoyatkina, TV Saldin, EL Schneldmiller, EA Schreiber, S Sedykh, SN Shvetsov, VS Sobierajski, R Sytchev, KP Tarasov, VV Tiedtke, K Treusch, R Yurkov, MV AF Faatz, B Fateev, AA Feldhaus, J Gerth, C Hahn, U Jastrow, U Krzywinski, J Lebedev, NI Lewellen, J Malkinski, L Meschkat, M Petrov, VA Rossbach, J Rukoyatkina, TV Saldin, EL Schneldmiller, EA Schreiber, S Sedykh, SN Shvetsov, VS Sobierajski, R Sytchev, KP Tarasov, VV Tiedtke, K Treusch, R Yurkov, MV TI Alignment of the optical feedback system of VUV regenerative FEL amplifier at the TESLA test facility at DESY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free electron laser; UV-radiation ID FREE-ELECTRON LASER AB TO this paper, we describe optical feedback system of VUV Regenerative FEE Amplifier (RAFEL) at the TESLA test facility at DESY. The aim of the RAFEL experiment is to construct fully coherent, tunable VUV radiation source by means of applying narrow-band optical feedback in the VUV SASE FEL operating Currently at DESY. One of the problem of the realization of the RAFEL is severe requirements for the angular stability of the optical elements (about few microradians). This problem has been solved by means of installation of active alignment system with reference laser. Another problem is alignment of optical elements separated by 65 in within complicated experimental conditions connected with aperture limitations (down to 6 min). This problem has been solved in two steps. Preliminary alignment with an accuracy of about 80 murad has been performed with laser alignment system and OTR screens used at the TTF accelerator for electron beam diagnostics. Final alignment has been performed with VUV SASE FEE radiation. Measured feedback coefficient is about 1 percent and is in agreement with the designed value. (C) 2002 Elsevier Science B.V. All rights reserved. C1 DESY, D-2000 Hamburg, Germany. Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia. PAS, Inst Phys, Warsaw, Poland. Argonne Natl Lab, Argonne, IL 60439 USA. RP Schneldmiller, EA (reprint author), DESY, Notkestr 85, D-2000 Hamburg, Germany. RI Sobierajski, Ryszard/E-7619-2012; Feldhaus, Josef/C-1130-2014; Treusch, Rolf/C-3935-2015; OI Treusch, Rolf/0000-0001-8479-8862 NR 8 TC 2 Z9 2 U1 0 U2 3 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 412 EP 417 AR PII S0168-9002(02)00353-4 DI 10.1016/S0168-9002(02)00353-4 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000081 ER PT J AU Tischer, M Ilinski, P Hahn, U Pfluger, J Schulte-Schrepping, H AF Tischer, M Ilinski, P Hahn, U Pfluger, J Schulte-Schrepping, H TI Photon diagnostics for the X-ray FELs at TESLA SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE X-ray free electron laser; photon beam characterization; trajectory alignment; phase tuning; imaging optics AB An X-ray diagnostic station will be installed for each of the XFEL undulator beamlines at TESLA. Primary purpose of the X-ray diagnostics is to provide an additional tool for alignment and commissioning of the numerous undulator cells along an XFEL beamline independently from electron-beam-based alignment procedures. Both methods will complement one another. The X-ray diagnostic station will be a sensitive instrument generating essential input for the undulator control system. The diagnostic station will be located about 120 m downstream from the last undulator cell. Total flux measurements will verify the XFEL's gain. Analysis of the spectral and spatial distribution of the spontaneous radiation of individual or several consecutive undulator segments will be used to optimize angle and position of the electron beam trajectory, to verify the magnetic gap, and to adjust the phase match between two undulator segments. The two latter purposes cannot be served by electron-beam-based alignment. (C) 2002 Elsevier Science B.V. All rights reserved. C1 DESY, Hamburger Synchrontronstschlungslab HASYLAB, D-22603 Hamburg, Germany. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Tischer, M (reprint author), DESY, Hamburger Synchrontronstschlungslab HASYLAB, Notkestr 85, D-22603 Hamburg, Germany. NR 16 TC 7 Z9 8 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 418 EP 424 AR PII S0168-9002(02)00354-6 DI 10.1016/S0168-9002(02)00354-6 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000082 ER PT J AU Benson, SV Gubeli, J Shinn, M AF Benson, SV Gubeli, J Shinn, M TI Mode distortion measurements on the Jefferson lab IR FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE high power; resonators; optics ID DEMO FEL AB We have previously reported on the analytical calculations of mirror distortion in a high-power FEL with a near-concentric cavity. This analysis allowed us to estimate the power level at which the FEL interaction would be affected, though no exact theory of FEL power vs. distortion exists at this point. Recently we have directly measured the mode size and beam quality as a function of power using a resonator with a center wavelength of 5 pm. The resonator mirrors were calcium fluoride. This particular material exhibits a large amount of distortion for a given power but, due to the negative slope of refractive index vs. temperature, adds almost no optical phase distortion on the laser output. The mode in the cavity can thus be directly calculated from the measurements at the resonator output. The presence of angular jitter produced raw measurements inconsistent with cold cavity expectations. Removing the effects of the angular jitter, we derive results in agreement with cold cavity measurements. The resulting indicates that the FEL power is limited for the IR Demo FEL when the Rayleigh range grows by a factor of 4.3. This corresponds to spherical aberration of 0.15lambda per mirror. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Benson, SV (reprint author), Jefferson Lab, MS 6A,12000 Jefferson Ave, Newport News, VA 23606 USA. NR 6 TC 2 Z9 2 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 434 EP 439 AR PII S0168-9002(02)00357-1 DI 10.1016/S0168-9002(02)00357-1 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000085 ER PT J AU Zolotorev, M AF Zolotorev, M TI Laser driven attosecond SASE X-ray FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE 3D-SASE FEL; X-ray; bright source; attosecond ID FREE-ELECTRON LASER; GAIN AB Modern lasers with emission wavelengths similar to1 mum can be used as electromagnetic wigglers and have sufficient output power to obtain wiggler parameters K (normalized vector potential) close to unity. With this kind of wiggler, in order to make a 10-keV X-ray SASE FEL, electron beam energies of similar to25 MeV are sufficient. In this presentation, scaling laws for the operation of FELs will be discussed. Using these scaling laws, requirements for electron sources will be obtained. The required electron beams must be about six orders of magnitude brighter than those available with existing sources. We propose a novel source based on vacuum laser pondermotive acceleration that will produce an electron beam meeting these requirements. This opens up a realistic possibility of realizing the dream of a "table top" X-ray SASE FEL. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Zolotorev, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 5 TC 10 Z9 10 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 445 EP 448 AR PII S0168-9002(02)00359-5 DI 10.1016/S0168-9002(02)00359-5 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000087 ER PT J AU Yu, LH Wu, JH AF Yu, LH Wu, JH TI Theory of high gain harmonic generation: an analytical estimate SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free electron laser ID FREE-ELECTRON LASERS; FEL AB We discuss the theory of the High Gain Harmonic Generation (HGHG). First, we describe an analytical estimate using the HGHG parameters in the DUVFEL project at BNL as an example. We show that the effective energy spread in a chicane dispersion section is found to be very small, and the effect of finite emittance can be neglected during the calculation of coherent harmonic generation. Then we discuss some issues such as the intensity stability, and how to use HGHG to obtain information about local energy spread. We compare these issues with recent experimental results in the infrared. We discuss some of the key issues in the cascading HGHG scheme and its possible limitations. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, NSLS, ATF, Upton, NY 11973 USA. RP Yu, LH (reprint author), Brookhaven Natl Lab, NSLS, ATF, Bldg 725C,Box 5000, Upton, NY 11973 USA. NR 21 TC 36 Z9 38 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 493 EP 498 AR PII S0168-9002(02)00368-6 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000096 ER PT J AU Schroeder, CB AF Schroeder, CB TI Photon statistics of the SASE FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron laser; photon statistics; SASE ID FREE-ELECTRON-LASER; FLUCTUATIONS; NOISE AB The photon statistics of the free-electron laser radiation are examined. The photon number moments are calculated for the multimode self-amplified spontaneous emission including the effects of the Gaussian free-electron laser spectral distribution. It is shown that, in the parameter regime where the pulse duration is of the order of the coherence time, the expectation value of the photon number moments deviate from those predicted by a negative-binomial probability distribution. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. RP Schroeder, CB (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 71-259, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 NR 16 TC 1 Z9 1 U1 0 U2 2 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 499 EP 503 AR PII S0168-9002(02)00369-8 DI 10.1016/S0168-9002(02)00369-8 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000097 ER PT J AU Huang, ZR Kim, KJ AF Huang, ZR Kim, KJ TI Transverse and temporal characteristics of a high-gain free-electron laser in the saturation regime SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE free-electron laser; saturation; refractive guiding; sideband instability ID AMPLIFIED SPONTANEOUS EMISSION AB The transverse and the temporal characteristics of a high-gain free-electron laser are governed by refractive guiding and sideband instability, respectively. Using the self-consistent Vlasov-Maxwell equations, we explicitly determine the effective index of refraction and the guided radiation mode for an electron beam with arbitrary transverse size. Electrons trapped by the guided radiation execute synchrotron oscillation and hence are susceptible to the sideband instability. We explain the spectral evolution and determine the sideband growth rate. These theoretical predictions agree well with GINGER simulation results. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Huang, ZR (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 13 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 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 1 PY 2002 VL 483 IS 1-2 BP 504 EP 509 AR PII S0168-9002(02)00370-4 DI 10.1016/S0168-9002(02)00370-4 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000098 ER PT J AU Xie, M AF Xie, M TI New mechanisms of interaction for even harmonic generation in free electron lasers SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE even harmonics; longitudinal coupling; vector wave equation AB A systematic search for new mechanisms of interaction is carried out by including electromagnetic field components that were previously neglected in FEL theory. Two new mechanisms are discovered that have major effect on even harmonic generation in FELs with planar wiggler. A classification of mechanisms of interaction is introduced and a new formulation of FEL equations is developed in order to treat the more complicated new phenomena. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Xie, M (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd MS 71-259, Berkeley, CA 94720 USA. NR 8 TC 6 Z9 6 U1 1 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 527 EP 530 AR PII S0168-9002(02)00374-1 DI 10.1016/S0168-9002(02)00374-1 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000102 ER PT J AU Fawley, WM Huang, ZR Kim, KJ Vinokurov, NA AF Fawley, WM Huang, ZR Kim, KJ Vinokurov, NA TI Tapered undulators for SASE FELs SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 23rd International Free Electron Laser Conference/8th FEL Users Workshop CY AUG 20-24, 2001 CL DARMSTADT, GERMANY SP Deutech Forsch Gemeinsch, Deutsch Elektronen Synchrotron, Vacuumschmelze GmbH, ACCEL, Agilent Technol, BESSY, Comp Simulat Technol, Univ Darmstadt DE tapered undulator; self-amplified spontaneous emission ID FREE-ELECTRON LASER; GAIN; INSTABILITIES; WIGGLERS AB We discuss the use of tapered undulators to enhance the performance of free-electron lasers (FELs) based upon self-amplified spontaneous emission, where the radiation tends to have a relatively broad bandwidth and limited temporal coherence. Using the polychromatic FEL simulation code GINGER, we numerically demonstrate the effectiveness of tapered undulators for parameters corresponding to the Argonne low-energy undulator test line FEL and the proposed linac coherent light source. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Souce, Argonne, IL 60439 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. RP Huang, ZR (reprint author), Argonne Natl Lab, Adv Photon Souce, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 15 TC 29 Z9 31 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 MAY 1 PY 2002 VL 483 IS 1-2 BP 537 EP 541 AR PII S0168-9002(02)00377-7 DI 10.1016/S0168-9002(02)00377-7 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 568DK UT WOS:000176527000105 ER PT J AU Ward, SJ Hunnell, JC Macek, JH AF Ward, SJ Hunnell, JC Macek, JH TI The effect of the polarization potential on low-energy atomic processes SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article DE positronium formation; photodetachment; effective range theory ID POSITRON-HYDROGEN SCATTERING; PHOTODETACHMENT; THRESHOLD AB We have illustrated the importance of explicitly taking into account the polarization potential in the filial outgoing channel to describe the threshold behavior of positronium formation in positron-hydrogen collisions. positronium formation in positron-helium collisions and the photodetachment of lithium negative ion into e(-) - Li(2p). (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ N Texas, Dept Phys, Denton, TX 76203 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ward, SJ (reprint author), Univ N Texas, Dept Phys, POB 311427, Denton, TX 76203 USA. NR 18 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 192 IS 1-2 BP 54 EP 62 AR PII S0168-583X(02)00706-1 DI 10.1016/S0168-583X(02)00706-1 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 569VX UT WOS:000176624100007 ER PT J AU Gasaneo, G Colavecchia, FD AF Gasaneo, G Colavecchia, FD TI A wave function for three charged particles with arbitrary masses SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article DE three-body problem; Coulomb interactions; correlated wave function; ion-atom; electron-atom; arbitrary masses ID COULOMB CONTINUUM PROBLEM; IMPACT IONIZATION; ELECTRON; HYDROGEN; COLLISIONS; EQUATION; SYSTEMS AB In this work we present a fully correlated wave function to describe the continuum of the three-body spectra for particles with arbitrary masses interacting with Coulomb potentials. We show that this function can be related with the Phi(2) correlated model introduced few years ago for ion-atom collisions processes. The function includes important properties such as correct asymptotic conditions and Kato's cusp conditions. We discuss the properties of the wave function for one heavy and two light particles, focusing in the case of positron-electron proton systems. A comparison between the properties of the new model and the C3 one is also performed. This analysis suggests that this function can be a successful alternative choice for the description of positron-atom collisions. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Univ Nacl Sur, Dept Fis, RA-8000 Bahia Blanca, Buenos Aires, Argentina. Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Los Alamos Natl Lab, Div Theoret, Grp T 12, Los Alamos, NM 87544 USA. RP Gasaneo, G (reprint author), Univ Tennessee, Dept Phys & Astron, 200 S Coll, Knoxville, TN 37996 USA. NR 27 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 192 IS 1-2 BP 150 EP 156 AR PII S0168-583X(02)00855-8 DI 10.1016/S0168-583X(02)00855-8 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 569VX UT WOS:000176624100022 ER PT J AU Selim, FA Wells, DP Harmon, JF Scates, W Kwofie, J Spaulding, R Duttagupta, SP Jones, JL White, T Roney, T AF Selim, FA Wells, DP Harmon, JF Scates, W Kwofie, J Spaulding, R Duttagupta, SP Jones, JL White, T Roney, T TI Doppler broadening measurements of positron annihilation using bremsstrahlung radiation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article DE bremsstrahlung; positron annihilation; Doppler broadening; defect measurements ID SPECTROSCOPY; FILMS AB The first system to measure Doppler broadening of positron annihilation based on during electron-pulse bremsstrahlung radiation has been constructed and demonstrated. No photon-induced activation or positron emitters are involved in the process. The collimated bremsstrahlung radiation from a small electron accelerator, which exhibits excellent penetrability, is used to generate positrons inside the sample via pair production. The annihilation photons are recorded by a HPGe detector. The line-shape parameters of Doppler broadening can be used to identify defects in pure metals and alloys. The dependence of these parameters on different elements has been measured and shows promise as a probe of momentum of electronic wave-functions in pure and composite materials. This method also shows promise as an additional tool for measuring elemental composition, when used in conjunction with accelerator-based X-ray fluorescence. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Idaho State Univ, Dept Phys, Idaho Accelerator Ctr, Pocatello, ID 83209 USA. Boise State Univ, Dept Elect Engn, Boise, ID 83725 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Selim, FA (reprint author), Idaho State Univ, Dept Phys, Idaho Accelerator Ctr, Campus Box 8263, Pocatello, ID 83209 USA. RI Selim, Farida/N-8077-2016 NR 10 TC 21 Z9 21 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 192 IS 1-2 BP 197 EP 201 AR PII S0168-583X(02)00868-6 DI 10.1016/S0168-583X(02)00868-6 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 569VX UT WOS:000176624100031 ER PT J AU Lynn, JE Trela, WJ Meggers, K AF Lynn, JE Trela, WJ Meggers, K TI Neutron Doppler broadening studies of tantalum and tungsten metal SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID DETECTOR AB With the aim of providing experimental verification of the validity of the neutron resonance spectroscopy method for measuring the moments of the phonon frequency spectra, we have deter-mined some of the phonon spectral parameters for W and Ta in the bcc phase of these metals by measuring the Doppler broadening of neutron resonances as a function of temperature. We find the mean phonon energy (first moment of the phonon frequency spectrum) of W to be = 20.2 +/- 0.4 meV and the second moment to be <(hv)(2)> = (4.9 +/- 0.2) x 10(-4) eV(2). The Boltzmann-weighted moments from all the measurable resonances of tungsten are quite consistent with a Debye model with a Debye temperature of 315 +/- 4 K. For Ta, = 14.3 +/- 0.1 meV, <(hv)(2)> = (2.2 +/- 0.2) X 10(-4) eV(2). The fitted Debye model temperature for the tantalum data is 217 +/- 2 K. In both cases the first and second moments agree well with those determined from neutron coherent inelastic scattering. Results with reasonable accuracy were extracted from resonances up to a few tens of eV. These results give high confidence that neutron resonance Doppler broadening spectroscopy is a viable and useful method for determining the characteristics of phonon frequency spectra. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, LANSCE 3, Los Alamos, NM 87545 USA. Univ Kiel, Kiel, Germany. RP Lynn, JE (reprint author), Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, LANSCE 3, Mail Stop H855, Los Alamos, NM 87545 USA. NR 21 TC 14 Z9 15 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 192 IS 3 BP 318 EP 330 AR PII S0168-583X(02)00480-9 DI 10.1016/S0168-583X(02)00480-9 PG 13 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 567LH UT WOS:000176485900010 ER PT J AU Karstens, W Smith, DY AF Karstens, W Smith, DY TI Defect signatures in dispersion spectra SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE refractive index; defects dispersion; free-carrier absorption AB The change in refractive index produced by defects in insulating crystals is studied using dispersion theory. Although typically 10(-3) smaller than the host-crystal index, this change can be observed in non-polar insulators and semiconductors for which the index obeys the Cauchy dispersion equation. Index measurements on high-purity silicon are analyzed as an example. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. St Michaels Coll, Dept Phys, Colchester, VT 05439 USA. Univ Vermont, Dept Phys, Burlington, VT 05405 USA. RP Smith, DY (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 44 EP 47 AR PII S0168-583X(02)00511-6 DI 10.1016/S0168-583X(02)00511-6 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300009 ER PT J AU Caceres, D Vergara, I Gonzalez, R Chen, Y Alves, E AF Caceres, D Vergara, I Gonzalez, R Chen, Y Alves, E TI Nanoindentation on MgO crystals implanted with lithium ions SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE nano indentation; ion implantation; defects; MgO ID ALKALINE-EARTH OXIDES; SINGLE-CRYSTALS AB As-grown MgO single crystals, both nominally pure and lithium-doped, were implanted with Li ions with an energy of 175 KeV and a dose of 10(17) ions/cm(2). MgO:Li crystals were also implanted after oxidation at 1550 K for 30 min. TRIM calculations yield a range of 610 nm for the implanted ions. Hardness and Young's modulus were measured in all the samples before and after implantation using a nanoindentation technique. As-grown MgO and MgO:Li crystals show the same hardness value of (9.1 +/- 0.2) GPa and Young's modulus of (290 +/- 115) GPa. After oxidation of MgO:Li crystals the hardness is (10.1 +/- 0.2) GPa. Implantation of Li ions hardens the near-surface region of all three samples: MgO, MgO:Li and oxidized MgO:Li. Implantation in MgO and MgO:Li showed the same behavior: hardness reaches a maximum value of (16.3 +/- 0.2) GPa at a penetration depth of approximate to175 nm, and slowly diminishes with depth. In oxidized MgO: Li crystals the maximum hardness is (17.7 +/- 0.2) GPa at a penetration depth of 175 nm. The considerable hardening observed in the implanted regions is attributed to the extraordinarily large concentration of interstitials in this region. (C) 2002 Published by Elsevier Science B.V. C1 Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Madrid 28911, Spain. US DOE, Div Mat Sci, Off Basic Energy Sci, Germantown, MD 20874 USA. Inst Tecnol & Nucl, P-2686953 Sacavem, Portugal. RP Gonzalez, R (reprint author), Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Avda Univ 30, Madrid 28911, Spain. RI Alves, Eduardo/K-2481-2013 OI Alves, Eduardo/0000-0003-0633-8937 NR 18 TC 5 Z9 5 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 154 EP 157 AR PII S0168-583X(02)00539-6 DI 10.1016/S0168-583X(02)00539-6 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300028 ER PT J AU Caceres, D Vergara, I Gonzalez, R Chen, Y AF Caceres, D Vergara, I Gonzalez, R Chen, Y TI Nanoindentation on neutron irradiated MgO crystals SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE nanoindentation; neutron irradiation; defects; MgO ID ATOMIC-FORCE MICROSCOPY; SINGLE-CRYSTALS; OXIDES; CAO AB Using a nanoindentation technique, hardness and Young's modulus were determined in as-grown MgO single crystals and after neutron irradiation with different doses tip to 6.9 x 10(18) n/cm(2). The resulting defects were monitored by optical absorption spectroscopy. As-grown crystals have a hardness of (9.1 +/- 0.2) GPa. After neutron irradiation, hardness increases with dose, whereas Young's modulus remains practically constant, indicating that the elastic properties are not influenced by the irradiation. For the highest neutron dose of 6.9 x 10(18) n/cm(2), the resulting value for hardness was (12.3 +/- 0.2) GPa. The recovery of radiation damage following thermal treatments is also investigated. The hardening observed in n-irradiated crystals is attributed to interstitials. (C) 2002 Published by Elsevier Science B.V. C1 Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Madrid 28911, Spain. US DOE, Div Mat Sci, Off Basic Energy Sci, Germantown, MD 20874 USA. RP Gonzalez, R (reprint author), Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Avda Univ 30, Madrid 28911, Spain. NR 20 TC 6 Z9 6 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 178 EP 180 AR PII S0168-583X(02)00554-2 DI 10.1016/S0168-583X(02)00554-2 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300033 ER PT J AU Tardio, M Ramirez, R Gonzalez, R Chen, Y Alves, E AF Tardio, M Ramirez, R Gonzalez, R Chen, Y Alves, E TI Electrical conductivity of MgO crystals implanted with lithium ions SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE electrical conductivity; ion implantation; defects; MgO ID ALKALINE-EARTH OXIDES; SINGLE-CRYSTALS AB MgO single crystals were implanted with a fluence of 1 x 10(17) Li+/cm(2) with 175 keV. Using ac and dc techniques, the electrical conductivity of these crystals was investigated in the temperature range 296-440 K. The electrical conductivity of the implanted region was 14 orders of magnitude higher than the unimplanted area. Measurements at different temperatures suggest a thermally activated process with an activation energy of about 0.33 eV. In the implanted area, electrical contacts are found to be ohmic whereas contacts are blocking in unimplanted crystals. Removal of thin layers of the implanted region by immersing the crystal in hot phosphoric acid suggests that the enhancement in conductivity in the implanted region is associated with the intrinsic defects created by the implantation, rather than with the Li ions. (C) 2002 Published by Elsevier Science B.V. C1 Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Madrid 28911, Spain. US DOE, Div Mat Sci, Off Basic Energy Sci, Germantown, MD 20874 USA. Inst Tecnol & Nucl, P-2686953 Sacavem, Portugal. RP Gonzalez, R (reprint author), Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Avda Univ 30, Madrid 28911, Spain. RI Alves, Eduardo/K-2481-2013; Ramirez Jimenez, Rafael/I-1769-2015; TARDIO LOPEZ, MIGUEL M./G-3177-2016 OI Alves, Eduardo/0000-0003-0633-8937; TARDIO LOPEZ, MIGUEL M./0000-0001-7413-0009 NR 18 TC 17 Z9 18 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 191 EP 195 AR PII S0168-583X(02)00557-8 DI 10.1016/S0168-583X(02)00557-8 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300036 ER PT J AU Kotomin, EA Kuzovkov, VN Popov, AI Monge, MA Gonzalez, R Chen, Y AF Kotomin, EA Kuzovkov, VN Popov, AI Monge, MA Gonzalez, R Chen, Y TI Diffusion-controlled annihilation and aggregation of F-centers in thermo chemically reduced MgO crystals SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE F centers; thermochemically reduced MgO; defect aggregation; metallic colloids ID SINGLE-CRYSTALS; IONIC SOLIDS; KINETICS AB The dynamics of F-center (an oxygen vacancy which has trapped two electrons) aggregation in thermochemically reduced MgO single crystals with an exceptionally high F-center concentration (6 x 10(18) cm(3)) is discussed. A theory of the Mg nanocavity formation process is developed based on diffusion-controlled aggregation of elastically interacting F centers and their annihilation at traps. We show that in contrast to the generally accepted viewpoint, the F centers in the bulk are not annealed out at the external sample surface but at internal defects, such as dislocations, subgrain boundaries and impurities. The mutual attraction of the F centers is a key factor controlling the aggregation process. (C) 2002 Published by Elsevier Science B.V. C1 Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia. Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany. Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Madrid 28911, Spain. US DOE, Div Mat Sci, Off Basic Energy Sci, Germantown, MD 20874 USA. RP Kotomin, EA (reprint author), Latvian State Univ, Inst Solid State Phys, Kengaraga 8, LV-1063 Riga, Latvia. RI Kuzovkov, Vladimir/F-6809-2010; Dep Theor Physics, Computer Modeling/E-6336-2013; Kotomin, Eugene/B-8070-2013; Popov, Anatoli /E-8828-2010 OI Kotomin, Eugene/0000-0002-8122-6276; Popov, Anatoli /0000-0003-2795-9361 NR 10 TC 3 Z9 3 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 208 EP 211 AR PII S0168-583X(02)00560-8 DI 10.1016/S0168-583X(02)00560-8 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300039 ER PT J AU Ila, D Zimmerman, RL Muntele, CI Thevenard, P Orucevic, F Santamaria, CL Guichard, PS Schiestel, S Carosella, CA Hubler, GK Poker, DB Hensley, DK AF Ila, D Zimmerman, RL Muntele, CI Thevenard, P Orucevic, F Santamaria, CL Guichard, PS Schiestel, S Carosella, CA Hubler, GK Poker, DB Hensley, DK TI Nano-cluster engineering: A combined ion implantation/co-deposition and ionizing radiation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL ID ALUMINA-SILICA GLASS; COLLOIDAL AU; NANOCLUSTERS AB We have used the energy deposited due to the electronic excitation by post-implantation irradiation to induce the nucleation of nano-clusters of Au in silica. We have produced the Au/silica by two methods. (A) MeV An implantation into silica, (B) producing thin films of a combined Art and silica on a silica substrate, using co-deposition of gold and silica. The process of ion beam assisted nucleation of nano-clusters was used to reduce the threshold implantation dose, or the An concentration in the silica host, required to produce An nano-crystals by at least two orders of magnitude. In this presentation, we applied a similar technique, post-irradiation electronic excitation, to films produced by both ion implantation of Au into silica as well as to films produced using co-deposition of gold and silica. By a co-deposition technique, gold and silica (co-deposited at various concentrations) are grown, then post-irradiated. The resultant An nano-cluster formation was observed and Studied using optical spectroscopy, X-ray diffraction. RBS and TEM. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Alabama A&M Univ, Ctr Irradiat Mat, Normal, AL 35762 USA. Univ Lyon 1, F-69365 Lyon, France. USN, Res Lab, Washington, DC 20375 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Ila, D (reprint author), Alabama A&M Univ, Ctr Irradiat Mat, POB 14, Normal, AL 35762 USA. EM ila@cim.aamu.edu RI Orucevic, Fedja/C-1248-2013; Hensley, Dale/A-6282-2016 OI Hensley, Dale/0000-0001-8763-7765 NR 13 TC 21 Z9 21 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 416 EP 421 AR PII S0168-583X(02)00584-0 DI 10.1016/S0168-583X(02)00584-0 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300081 ER PT J AU White, CW Withrow, SP Budai, JD Boatner, LA Sorge, KD Thompson, JR Beaty, KS Meldrum, A AF White, CW Withrow, SP Budai, JD Boatner, LA Sorge, KD Thompson, JR Beaty, KS Meldrum, A TI Ferromagnetic FePt nanoparticles formed in Al2O3 by ion implantation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE FePt nanoparticles; ferromagnetic nanoparticles; oriented nanoparticles; ordered alloy ID THIN-FILMS AB Oriented, ferromagnetic FePt nanoparticles have been produced in Al2O3 single crystals by ion implantation and annealing. FePt orientation and particle size depends strongly on the implantation conditions. Magnetic coercivities of these nanocomposites are extremely high, reaching values in excess of 20 kOe for Pt concentrations of similar to45% in the FePt alloy. The formation of ferromagnetic FePt nanoparticles in fused SiO2 is also demonstrated. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Alberta, Edmonton, AB T6G 2J1, Canada. RP White, CW (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RI Boatner, Lynn/I-6428-2013; Budai, John/R-9276-2016; OI Boatner, Lynn/0000-0002-0235-7594; Budai, John/0000-0002-7444-1306; Buchanan, Kristen/0000-0003-0879-0038 NR 7 TC 17 Z9 17 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 437 EP 441 AR PII S0168-583X(02)00588-8 DI 10.1016/S0168-583X(02)00588-8 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300085 ER PT J AU Gao, F Weber, WJ Devanathan, R AF Gao, F Weber, WJ Devanathan, R TI Defect production, multiple ion-solid interactions and amorphization in SiC SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE computer simulation; defect production; multiple ion-solid interaction; amorphization; SiC ID IRRADIATION-INDUCED AMORPHIZATION; BEAM-INDUCED AMORPHIZATION; SILICON-CARBIDE; DISPLACEMENT CASCADES; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; DAMAGE; METALS; ACCUMULATION; CERAMICS AB Recent progress in the atomic-scale simulations of fundamental damage production processes in SiC is reviewed, which includes the displacement threshold energy surface, the primary damage state and statistics of defect production, multiple ion-solid collision events and structural evolution in SiC. The threshold energy surface, E-d, appears to be highly anisotropic, and the results of molecular dynamics (MD) simulations, in conjunction with experimental studies, suggest that Ed values of 20 eV for C and 35 eV for Si should be used in Kinchin-Pease calculations. The Si displacement cascades with energies up to 50 keV show that the surviving defects are dominated by C interstitials and vacancies, consistent with experimental observations. The defect production efficiency decreases with increasing recoil energy, but the number and size of clusters or complex domains formed at the end of cascades are very small, independent of cascade energy. A large number of 10 keV displacement cascades were randomly generated in a model crystal to simulate multiple ion-solid interaction and damage accumulation. The coalescence of clusters represents an important mechanism leading to the complete amorphization of SiC, and the relative disorder and swelling behavior show an excellent agreement with experimental observations. HRTEM images simulated from the MD cell reveal the microstructural evolution of multiple ion-solid collision events, and provide atomic-level interpretations of experimentally observed features in SiC. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Indian Inst Technol, Dept Met Engn, Madras 600036, Chennai, India. RP Gao, F (reprint author), Pacific NW Natl Lab, MS K8-93,POB 999, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012; Devanathan, Ram/C-7247-2008 OI Weber, William/0000-0002-9017-7365; Devanathan, Ram/0000-0001-8125-4237 NR 40 TC 56 Z9 56 U1 2 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 487 EP 496 AR PII S0168-583X(02)00598-0 DI 10.1016/S0168-583X(02)00598-0 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300095 ER PT J AU Snead, LL Zinkle, SJ AF Snead, LL Zinkle, SJ TI Structural relaxation in amorphous silicon carbide SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE silicon carbide; amorphization; relaxation; crystallization ID IRRADIATION-INDUCED CRYSTALLINE; SIC SINGLE-CRYSTALS; BEAM-INDUCED AMORPHIZATION; ION-IMPLANTATION; TRANSITION; CERAMICS; RADIATION; DAMAGE AB High purity single crystal and chemically vapor deposited (CVD) silicon carbide have been amorphized under fast neutron irradiation. The gradual transition in physical properties from the as-amorphized state to a more relaxed amorphous state prior to crystallization is studied. For the three bulk properties studied: density, electrical resistivity, and thermal conductivity, large property changes occur upon annealing between the amorphization temperature and the point of crystallization. These physical property changes occur in the absence of crystallization and are attributed to short and perhaps medium range ordering during annealing. It is demonstrated that the physical properties of amorphous SiC (a-SiC) can vary greatly and are likely a function of the irradiation state producing the amorphization. The initiation of crystallization as measured using bulk density and in situ TEM is found to be similar to875 degreesC, though the kinetics of crystallization above this point are seen to depend on the technique used. It is speculated that in situ TEM and other thin-film approaches to study crystallization of amorphous SiC are flawed due to thin-film effects. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37830 USA. RP Snead, LL (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37830 USA. EM z2n@ornl.gov OI Zinkle, Steven/0000-0003-2890-6915 NR 38 TC 67 Z9 69 U1 0 U2 25 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 497 EP 503 AR PII S0168-583X(02)00599-2 DI 10.1016/S0168-583X(02)00599-2 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300096 ER PT J AU Gao, F Weber, WJ AF Gao, F Weber, WJ TI Empirical potential approach for defect properties in 3C-SiC SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE empirical potential; defect properties; silicon carbide; computer simulation ID SI-H SYSTEMS; SILICON-CARBIDE AB Defect energetics in silicon carbide (SiC) have been widely studied using Tersoff potentials, but these potentials do not provide a good description of interstitial properties. In the present work, an empirical many-body interatomic potential is developed by fitting to various equilibrium properties and stable defect configurations in bulk SiC, using a lattice relaxation fitting approach. This parameterized potential has been used to calculate defect formation energies and to determine the most stable configurations for interstitials using the molecular dynamics method. Although the formation energies of vacancies are smaller than those obtained by ab initio calculations, the properties of antisite defects and interstitials are in good agreement with the results calculated by ab initio methods. It is found that the most favorable configurations for C interstitials are <100> and <110> dumbbells on both Si and C sites. with formation energies from 3.04 to 3.95 eV. The most favorable Si interstitial is the tetrahedral interstitial site, surrounded by four C atoms, with a formation energy of 3.97 eV. The present results will be discussed and compared to those obtained by others using various empirical potentials in SiC. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Gao, F (reprint author), Pacific NW Natl Lab, MS K8-93,POB 999, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012 OI Weber, William/0000-0002-9017-7365; NR 11 TC 58 Z9 58 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 504 EP 508 AR PII S0168-583X(02)00600-6 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300097 ER PT J AU Jiang, W Weber, WJ Thevuthasan, S Shutthanandan, V AF Jiang, W Weber, WJ Thevuthasan, S Shutthanandan, V TI Channeling study of lattice disorder and gold implants in gallium nitride SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE ion irradiation; disorder accumulation and recovery; ion channeling analysis; GaN ID ION-IMPLANTATION; SITE LOCATION; GAN; DAMAGE AB Irradiation experiments have been performed 60degrees off normal for a gallium nitride (GaN) single-crystal film at 300 K using 3 MeV Au3+ ions over fluences ranging from 0.88 to 86.2 ions/nm(2). The accumulation of disorder on both the Ga and N sublattices has been simultaneously investigated using 3.8 MeV He+ non-Rutherford backscattering spectrometry (non-RBS) along the <0001> and <10 (1) over bar1> axial channeling directions. The accumulated disorder at the damage peak increases with dose below 10 dpa and saturates at a relative level of similar to0.7 between 10 and 60 dpa. Complete amorphization starts at the surface and grows into the damage peak regime. A higher rate of disordering on the N sublattice is observed at low damage levels, which suggests a lower threshold displacement energy on the N sublattice in GaN. Isochronal annealing (20 min) at temperatures up to 1000 K has been used to follow the thermal response of the Ga disorder and An implants. Some defect recovery occurs at the intermediate damage levels. A fraction of An occupancy on the Ga lattice site is observed in the as-implanted GaN, and the substitutional fraction of the implanted Au increases with increasing temperature. (C) 2002 Published by Elsevier Science B.V. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Jiang, W (reprint author), Pacific NW Natl Lab, POB 999,MSIN K8-93, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; OI Weber, William/0000-0002-9017-7365; Jiang, Weilin/0000-0001-8302-8313 NR 16 TC 8 Z9 8 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 509 EP 513 AR PII S0168-583X(02)00601-8 DI 10.1016/S0168-583X(02)00601-8 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300098 ER PT J AU Weber, WJ Jiang, W Zhang, Y Hallen, A AF Weber, WJ Jiang, W Zhang, Y Hallen, A TI Damage evolution and recovery in 4H and 6H silicon carbide irradiated with aluminum ions SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE silicon carbide; defects; amorphization; thermal recovery ID INDUCED AMORPHIZATION; ACCUMULATION; DISORDER; CERAMICS AB Damage evolution and isochronal recovery have been studied in single crystal 4H and 6H silicon carbide (SiC) irradiated with 1.1 MeV Al-2(2+) molecular ions at 150 K to ion fluences ranging from 0.15 to 2.85 Al+/nm(2). The damage evolution and recovery on both the Si and C sublattices were determined using a 0.94 MeV deuterium beam in ion channeling geometry by simultaneously measuring the scattering/reaction yield from Rutherford backscattering spectrometry combined with C-12(d,p)C-13 nuclear reaction analysis. The rate of damage evolution at 150 K is higher for 4H-SiC than for 6H-SiC. At low doses, the rate of C disordering is higher than that for Si, which is consistent with the lower displacement energy for C. Both 4H and 614 SiC exhibit only minor damage recovery below 300 K. Above 300 K damage recovery on the Si and C sublattices is similar for both 4H and 6H SiC. Three distinct recovery stages are observed on each sublattice in 4H-SiC, and at high doses, where a buried amorphous layer is produced, an additional recovery stage is observed above 800 K. (C) 2002 Published by Elsevier Science B.V. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Angstrom Lab, Div Ion Phys, S-75121 Uppsala, Sweden. Royal Inst Technol, Dept Elect, SE-16440 Stockholm, Sweden. RP Weber, WJ (reprint author), Pacific NW Natl Lab, MSIN K8-93,POB 999, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; OI Weber, William/0000-0002-9017-7365; Jiang, Weilin/0000-0001-8302-8313 NR 15 TC 5 Z9 5 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 514 EP 518 AR PII S0168-583X(02)00602-X DI 10.1016/S0168-583X(02)00602-X PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300099 ER PT J AU Rodrigues, MG da Cruz, NC Rangel, EC Zimmerman, RL Ila, D Poker, DB Hensley, DK AF Rodrigues, MG da Cruz, NC Rangel, EC Zimmerman, RL Ila, D Poker, DB Hensley, DK TI Nanoindentation mechanical properties characterization of glassy polymeric carbon treated with ion beam SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE glassy polymeric carbon; ion beam; hardness AB Phenolic resins when heat treated in inert atmosphere up to 1000 degreesC become glassy polymeric carbon (GPC), a chemically inert and biocompatible material useful for medical applications, such as in the manufacture of heart valves and prosthetic devices. In earlier work we have shown that ion bombardment can modify the surface of GPC, increasing its roughness. The enhanced roughness, which depends on the species, energy and fluence of the ion beam, can improve the biocompatibility of GPC prosthetic artifacts. In this work, ion bombardment was used to make a layer of implanted ions under the surface to avoid the propagation of microcracks in regions where cardiac valves should have pins for fixation of the leaflets. GPC samples prepared at 700 and 1500 degreesC were bombarded with ions of silicon. carbon, oxygen and gold at energies of 5, 6, 8 and 10 MeV, respectively, and fluences between 1.0 x 10(13) and 1.0 x 10(16) ions/cm(2). Nanoindentation hardness characterization was used to compare bombarded with non-bombarded samples prepared at temperatures up to 2500 degreesC. The results with samples not bombarded showed that the hardness of GPC increases strongly with the heat treatment temperature. Comparison with ion bombarded samples shows that the hardness changes according to the ion used, the energy and fluence. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USP, FFCLRP, Dept Math & Phys, BR-14040901 Ribeirao Preto, SP, Brazil. UNESP, Dept Chem & Phys, Guaratingueta, SP, Brazil. Alabama A&M Univ, Ctr Irradiat Mat, Normal, AL 35762 USA. Oak Ridge Natl Lab, SMAC, Oak Ridge, TN USA. RP Rodrigues, MG (reprint author), USP, FFCLRP, Dept Math & Phys, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP, Brazil. RI Cruz, Nilson/C-8519-2012; Rangel, Elidiane/D-3261-2012; Hensley, Dale/A-6282-2016 OI Cruz, Nilson/0000-0002-0354-3890; Rangel, Elidiane/0000-0001-7909-190X; Hensley, Dale/0000-0001-8763-7765 NR 4 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 524 EP 529 AR PII S0168-583X(02)00604-3 DI 10.1016/S0168-583X(02)00604-3 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300101 ER PT J AU Sickafus, KE Valdez, JA Williams, JR Grimes, RW Hawkins, HT AF Sickafus, KE Valdez, JA Williams, JR Grimes, RW Hawkins, HT TI Radiation induced amorphization resistance in A(2)O(3)-BO2 oxides SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL ID DAMAGE ACCUMULATION; CUBIC ZIRCONIA; ION-BEAM; CERAMICS; PYROCHLORE; PLUTONIUM; WASTE AB Much work has been devoted in recent years to identifying ceramic materials that can withstand high doses of radiation without incurring excessive defect accumulation, or suffering undesirable transformations such as amorphization. In this paper, it is proposed that a large range of A(2)O(3)-BO2 oxide compositions, with structures related to the fluorite crystal structure, may exhibit exceptional resistance to radiation-induced amorphization. Results of heavy ion irradiations on selected A(2)O(3)-BO2 oxide compounds are presented in support of this prediction. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England. RP Sickafus, KE (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Mail Stop G755, Los Alamos, NM 87545 USA. EM kurt@lanl.gov RI Williams, Jesse/B-5923-2008 NR 22 TC 22 Z9 22 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 549 EP 558 AR PII S0168-583X(02)00609-2 DI 10.1016/S0168-583X(02)00609-2 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300106 ER PT J AU McHargue, C Ononye, LC Allard, LF Alves, E da Silva, MF Soares, JC AF McHargue, C Ononye, LC Allard, LF Alves, E da Silva, MF Soares, JC TI The structure of sapphire implanted with nitrogen at room temperature and 1000 degrees C SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE sapphire; TEM; RBS-C; optical absorption ID DAMAGE AB The structure of N-implanted sapphire (single crystal alpha-Al2O3) has been studied using Rutherford backscattering-ion channeling spectroscopy (RBS-C), transmission electron microscopy (TEM) and optical absorption. Specimens having the c-axis normal to the optically polished surface were implanted with 3 x 10(16) N/cm(2) (150 keV) at room temperature and 1000 degreesC. Little residual disorder was observed in the RBS-C spectra for the RT samples. A band of bubbles or voids (diameters 1-10 nm) extending from about 75 to 300 nm below the surface was observed in cross-sectioned TEM specimens. The disorder was greater in the 1000 degreesC sample and the TEM examination indicated the presence of extended defects lying parallel to the c-planes. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. ITN, P-2686953 Sacavem, Portugal. RP McHargue, C (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. RI Alves, Eduardo/K-2481-2013; OI Alves, Eduardo/0000-0003-0633-8937; Soares, Jose/0000-0001-5277-4575 NR 7 TC 5 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 629 EP 632 AR PII S0168-583X(02)00623-7 DI 10.1016/S0168-583X(02)00623-7 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300120 ER PT J AU Monteiro, T Boemare, C Soares, MJ Alves, E Marques, C McHargue, C Ononye, LC Allard, LF AF Monteiro, T Boemare, C Soares, MJ Alves, E Marques, C McHargue, C Ononye, LC Allard, LF TI Luminescence and structural studies of iron implanted alpha-Al2O3 SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE ion implantation; RBS; luminescence ID SAPPHIRE; CRYSTAL; FE3+ AB Transition metal ions (TM) are typically contaminants of growth processes in wide band gap materials. In Al2O3 (E-g similar to 9 eV) Cr, Fe and Ti are responsible for red, yellow and blue colored sapphire. While the R-lines from Cr-3 have been extensively studied by photoluminescence (PL) the optical characterization of other transition metal ions is less known. In this work we studied by PL, transmission electron microscopy (TEM) and RBS/channeling measurements a series of iron implanted alpha-Al2O3 samples. In the red region a sharp emission line at 1.833 eV with a lifetime of similar to1 ms is identified at low temperature. For temperatures above 35 K and on the high energy side a new thermally populated emission line occurs at 1.843 eV. Structural analysis performed by RBS/channeling, TEM and X-ray measurements indicates that metallic iron precipitates as well as iron oxide complexes are present in the samples. Combining the temperature dependence of luminescence and decay times with the results obtained from structural analysis a model for the optical center is discussed. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Inst Tecnol & Nucl, Dept Fis, P-2686953 Sacavem, Portugal. Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal. Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Alves, E (reprint author), Inst Tecnol & Nucl, Dept Fis, Estrada Nac 10, P-2686953 Sacavem, Portugal. RI Marques, Carlos/C-2241-2008; Monteiro, Teresa/B-7466-2012; Universidade Aveiro, Departamento Fisica/E-4128-2013; Soares, Manuel/J-6537-2013; Alves, Eduardo/K-2481-2013 OI Monteiro, Teresa/0000-0001-6945-2759; Soares, Manuel/0000-0002-8059-7067; Alves, Eduardo/0000-0003-0633-8937 NR 16 TC 16 Z9 17 U1 1 U2 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 638 EP 643 AR PII S0168-583X(02)00625-0 DI 10.1016/S0168-583X(02)00625-0 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300122 ER PT J AU Marques, C Alves, E McHargue, C Ononye, LC Monteiro, T Soares, J Allard, LF AF Marques, C Alves, E McHargue, C Ononye, LC Monteiro, T Soares, J Allard, LF TI Influence of annealing atmosphere on the behavior of titanium implanted sapphire SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE nanoparticles; alpha-Al2O3; optical properties ID AL2O3; PHOTOLUMINESCENCE AB Sapphire single crystals with (0 0 0 1) and (0 2 (2) over bar 1) orientations were implanted at room temperature with several fluences of Ti at 150 keV. For low fluences (up to 1 X 10(15) Ti-/cm(2)) the Ti ions are fully incorporated in Al sites of the lattice and remain stable up to temperatures of the order of 1000 degreesC as revealed by detailed channeling angular scans. The amorphous state is reached after implantation of 5 x 10(16) Ti+/cm(2). Annealing in oxidizing atmosphere leads to complete recovery of the amorphous region and the segregation of Ti to the surface. The RBS and TEM pictures show that Ti oxides concentrate at the surface after annealing at 1000 degreesC. The same annealing in a reducing atmosphere produces a buried layer of Ti precipitates centered at the range of the implanted ions. The damage recovery is hindered by the presence of this layer as shown by the <0001> aligned RBS spectrum. The surface layer becomes polycrystalline as the TEM micrographs reveal. Optical absorption measurements show the presence of a broad band centered at 350 nm for the samples annealed in air. This band is absent in the samples annealed in a reducing atmosphere but the background absorption is much higher compared with the samples annealed on air. Photoluminescence (PL) measurements reveal the presence of an emission band centered around 800 nm. (C) 2002 Published by Elsevier Science B. V. C1 Inst Tecnol & Nucl, Dept Fis, P-2686953 Sacavem, Portugal. Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA. Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Alves, E (reprint author), Inst Tecnol & Nucl, Dept Fis, Estrada Nac 10, P-2686953 Sacavem, Portugal. RI Marques, Carlos/C-2241-2008; Monteiro, Teresa/B-7466-2012; Universidade Aveiro, Departamento Fisica/E-4128-2013; Soares, Manuel/J-6537-2013; Alves, Eduardo/K-2481-2013; OI Marques, Carlos/0000-0001-5691-6569; Monteiro, Teresa/0000-0001-6945-2759; Soares, Manuel/0000-0002-8059-7067; Alves, Eduardo/0000-0003-0633-8937; Soares, Jose/0000-0001-5277-4575 NR 11 TC 6 Z9 6 U1 1 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 644 EP 648 AR PII S0168-583X(02)00626-2 DI 10.1016/S0168-583X(02)00626-2 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300123 ER PT J AU Garcia, ITS Zawislak, FC Balzaretti, NM Nastasi, M AF Garcia, ITS Zawislak, FC Balzaretti, NM Nastasi, M TI Heavy ion (Xe and I) irradiation effects on photoresist films SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE ion irradiation; photoresist; hardness; carbonization ID POLYMERS AB This contribution presents a study of heavy ion irradiation induced chemical, structural and tribological modifications in photoresist films. Novolak-diazoquinone films 400 and 800 nm thick have been irradiated with 800 keV Xe++ and 4 MeV I++ ions respectively in a fluence range of 10(13) to 6 x 10(15) ions cm(-2). At these energies, both ions have the same nuclear S. plus electronic S, stopping power, congruent to200 eV Angstrom(-1), but the ratio S-e/S-n is congruent to1/3 for Xe++ and congruent to3 for I++. A detailed investigation of the chemical composition and structural modification of the films due to the irradiation was performed using the ERDA, Raman and nanoindentation techniques. The measured hardness H = 13 GPa and Young's modulus E = 140 GPa for both films and the respective Raman spectra show that, at the largest fluences, both films are transformed into amorphous carbon layers. However, in the region of intermediate fluences the effects of irradiation on H and E are governed by a competition between the nuclear and the electronic stopping powers. The present data are compared with our previous measurements of the same film irradiated with He+ ions, when the nature of the transferred energy density is mainly of electronic origin. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Ctr Univ La Salle, BR-92010000 Canoas, RS, Brazil. UFRGS, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Zawislak, FC (reprint author), Ctr Univ La Salle, BR-92010000 Canoas, RS, Brazil. RI GARCIA, IRENE/E-1920-2013; Balzaretti, Naira/L-3417-2014 OI GARCIA, IRENE/0000-0003-1647-5054; Balzaretti, Naira/0000-0003-2797-8618 NR 10 TC 4 Z9 4 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 733 EP 738 AR PII S0168-583X(02)00643-2 DI 10.1016/S0168-583X(02)00643-2 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300140 ER PT J AU Zinkle, SJ Skuratov, VA Hoelzer, DT AF Zinkle, SJ Skuratov, VA Hoelzer, DT TI On the conflicting roles of ionizing radiation in ceramics SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE radiation effects; microstructure; amorphization; F centers ID SWIFT HEAVY-IONS; MAGNESIUM ALUMINATE SPINEL; NEUTRON-IRRADIATION DAMAGE; THERMAL SPIKE DESCRIPTION; MICROSTRUCTURAL EVOLUTION; ENHANCED DIFFUSION; TRACK FORMATION; INSULATORS; SPECTRUM; MGO AB Ionizing radiation can produce competing effects in ceramic materials. It is well established that ionizing radiation can produce displacement damage via radiolysis in alkali halides and some other ceramics. At high stopping powers (electronic dE/dx > 5-50 keV/nm, depending on the material), additional displacement damage via inelastic collision processes can also be created in the vicinity of the ion track (swift-heavy-ion displacement damage). On the other hand, ionizing radiation can promote the recovery of displacement damage in many ceramic insulators by enhancing the mobility of point defects (ionization-induced diffusion). Therefore, under different irradiation conditions (electronic stopping powers), ionizing radiation can lead to either a substantial enhancement or suppression of radiation resistance in ceramics. The microstructures of SiC, Al2O3, MgO, MgAl2O4, Si3N4 and AlN were examined by transmission electron microscopy (TEM) following irradiation with ion beams ranging from I MeV H+ to 710 MeV Bi+. The oxides and Si3N4 were found to be susceptible to ionization-induced diffusion. In these materials, high fluxes of ionizing radiation produced coarsening of dislocation loops and cavities, and inhibited low-temperature amorphization. At high electronic stopping powers, displacement damage was produced in the ion tracks in the oxides and Si3N4 that could not be attributed to normal elastic collision processes. The amorphous ion track diameter in Si3N4 associated with 710 MeV Bi ion irradiation was 3.5 nm. AlN and SiC were resistant to swift-heavy-ion-track displacement damage up to electronic stopping powers of 34 keV/nm. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Joint Inst Nucl Res, Ctr Appl Phys, Flerov Lab Nucl React, Dubna 141980, Moscow Region, Russia. RP Zinkle, SJ (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM zinklesj@ornl.gov RI Hoelzer, David/L-1558-2016; OI Zinkle, Steven/0000-0003-2890-6915 NR 58 TC 88 Z9 88 U1 1 U2 29 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X EI 1872-9584 J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 758 EP 766 DI 10.1016/S0168-583X(02)00648-1 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300144 ER PT J AU Zimmerman, R Ila, D Muntele, C Rodrigues, M Poker, DB Hensley, D AF Zimmerman, R Ila, D Muntele, C Rodrigues, M Poker, DB Hensley, D TI Enhanced tissue adhesion by increased porosity and surface roughness of carbon based biomaterials SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 11th International Conference on Radiation Effects in Insulators CY SEP 03-07, 2001 CL LISBON, PORTUGAL DE carbon biomaterials; carbon; tissue adhesion ID GLASSY POLYMERIC CARBON; LITHIUM; WARE AB We present recent results using ions of C, O, Si, Fe, Zn and Au at energies between 100 keV and 10 MeV to increase the roughness and porosity of the partially and fully cured precursor phenolic resins. The fully cured phenolic resin is called glassy polymeric carbon (GPC). GPC is chemically inert, biocompatible and useful for medical applications, such as heart valves and other prosthetic devices. Ion implantation enhances biological cell/tissue growth on, and tissue adhesion to, prosthetic devices made from GPC. We have previously shown that increased porosity of GPC is also useful for drug delivery devices. The porosity of the ion implanted partially and fully cured precursor phenolic resins was measured by introducing lithium from a molten LiCl salt into each sample. By using Li(p, 2alpha) nuclear reaction analysis (NRA) we measured the concentration of Li retention in the pre- and post-implanted samples. The surface roughness was measured using optical microscopy. The curing process was monitored using micro-Raman microscopy. We have correlated the NRA measurements of increased pore availability with the observations of increased surface roughness. (C) 2002 Published by Elsevier Science B.V. C1 Alabama A&M Univ, Ctr Irradiat Mat, Normal, AL 35762 USA. Oak Ridge Natl Lab, SMAC, Oak Ridge, TN 37831 USA. RP Zimmerman, R (reprint author), Alabama A&M Univ, Ctr Irradiat Mat, Normal, AL 35762 USA. RI Hensley, Dale/A-6282-2016 OI Hensley, Dale/0000-0001-8763-7765 NR 11 TC 10 Z9 11 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 191 BP 825 EP 829 AR PII S0168-583X(02)00622-6 DI 10.1016/S0168-583X(02)00662-6 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 571AH UT WOS:000176692300156 ER PT J AU McDaniel, FD Doyle, BL Seager, CH Walsh, DS Vizkelethy, G Brice, DK Yang, C Rossi, P Nigam, M El Bouanani, M Prasad, GVR Schwartz, JC Mitchell, LT Duggan, JL AF McDaniel, FD Doyle, BL Seager, CH Walsh, DS Vizkelethy, G Brice, DK Yang, C Rossi, P Nigam, M El Bouanani, M Prasad, GVR Schwartz, JC Mitchell, LT Duggan, JL TI Ionoluminescence decay measured with single ions SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE ionoluminescence; ion beam induced luminescence; ion beam induced charge collection; ion photon emission microscope; phosphors; luminescence, scanning nuclear microprobe, nuclear microprobe analysis ID NUCLEAR MICROPROBE; EMISSION MICROSCOPY AB A new ion beam analysis-based, single ion technique called the time to first photon has been developed to measure the decay of the luminescence signal of phosphors. Such measurements are currently needed to study luminescence decay mechanisms following high-density excitations and to identify strongly luminescent phosphor coatings with short lifetimes for ion photon emission microscopy (IPEM). The samples for this technique consist of thin phosphor layers placed or coated on the surface of PIN diodes. Single ions from an accelerator strike this sample and simultaneously create ion beam induced luminescence (IBIL) from the phosphor that is measured by a single-photon-detector, and an ion beam induced charge collection (IBICC) signal in the PIN diode. In this case, the IBICC signal provides the start pulse and the IBIL signal the stop pulse to a time to amplitude converter. It is straightforward to show that this approach also measures a signal proportional to activity versus time with an accuracy of 5% as long as the number of detected photons per ion is less than 0.1, which usually requires the use of absorbers for the IBIL detector or electronic discrimination for the IBIL signals. Details of the new analysis are given together with examples of luminescence decay measurements of several ceramic phosphors being considered to coat IPEM samples. IPEM is currently being developed at Sandia National Laboratory (SNL), the University of North Texas in Denton, and the Universities and INFN of Padova and Torino. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ N Texas, Ion Beam Modificat & Anal Lab, Dept Phys, Denton, TX 76203 USA. Sandia Natl Labs, Radiat Solid Interact & Proc Dept 1111, Albuquerque, NM 87185 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. RP McDaniel, FD (reprint author), Univ N Texas, Ion Beam Modificat & Anal Lab, Dept Phys, POB 311427, Denton, TX 76203 USA. RI Schwartz, Jacob/J-6477-2012 NR 10 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 1 EP 10 AR PII S0168-583X(01)01234-4 DI 10.1016/S0168-583X(01)01234-4 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800002 ER PT J AU Doyle, BL Vizkelethy, G Walsh, DS Swenson, D AF Doyle, BL Vizkelethy, G Walsh, DS Swenson, D TI Axial ion-electron emission microscopy of IC radiation hardness SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE radiation effects microscopy; radio frequency quadrupole; ion electron emission microscope; ion beam induced charge collection; nuclear microprobe analysis ID SPACE AB A new system for performing radiation effects microscopy (REM) has been developed at Sandia National Laboratory in Albuquerque. This system combines two entirely new concepts in accelerator physics and nuclear microscopy. A radio frequency quadrupole (RFQ) linac is used to boost the energy of ions accelerated by a conventional Tandem Van de Graaff-Pelletron to velocities of 1.9 MeV/amu. The electronic stopping power for heavy ions is near a maximum at this velocity, and their range is similar to20 mum in Si. These ions therefore represent the most ionizing form of radiation in nature, and are nearly ideal for performing single event effects testing of integrated circuits. Unfortunately, the energy definition of the RFQ-boosted ions is rather poor (similar to a few %), which makes problematic the focussing of such ions to the submicron spots required for REM. To circumvent this problem, we have invented ion electron emission microscopy (IEEM). One can perform REM with the IEEM system without focussing or scanning the ion beam. This is because the position on the sample where each ion strikes is determined by projecting ion-induced secondary electrons at high magnification onto a single electron position sensitive detector. This position signal is then correlated with each REM event. The IEEM system is now mounted along the beam line in an axial geometry so that the ions pass right through the electron detector (which is annular), and all of the electrostatic lenses used for projection. The beam then strikes the sample at normal incidence which results in maximum ion penetration and removes a parallax problem experienced in an earlier system. Details of both the RFQ-booster and the new axial IEEM system are given together with some of the initial results of performing REM on Sandia-manufactured radiation hardened integrated circuits. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Linac Syst, Albuquerque, NM 87122 USA. RP Doyle, BL (reprint author), Sandia Natl Labs, POB 5800,Org 1111 MS-1056,POB 5000, Albuquerque, NM 87185 USA. NR 10 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 19 EP 25 AR PII S0168-583X(01)01270-8 DI 10.1016/S0168-583X(01)01270-8 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800004 ER PT J AU King, BV Savina, MR Tripa, CE Calaway, WF Veryovkin, IV Moore, JF Pellin, MJ AF King, BV Savina, MR Tripa, CE Calaway, WF Veryovkin, IV Moore, JF Pellin, MJ TI Single photon ionisation of self assembled monolayers SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE photoionisation; laser desorption; SIMS; SNMS ID IONIZATION MASS-SPECTROMETRY AB Self assembled monolayers formed from benzenethiol, diphenylsulphide and diphenyldisulphide have been analysed using secondary ion mass spectrometry (SIMS), sputter neutral mass spectrometry (SNMS) and laser desorption photoionisation mass spectrometry (LDPI). The peak corresponding to the parent ion was much stronger in LDPI than with SIMS or SNMS analysis and fragmentation was lower. A useful yield of order 0.5% was obtained for LDPI from diphenyldisulphide. Published by Elsevier Science B.V. C1 Univ Newcastle, Sch Math & Phys Sci, Callaghan, NSW 2308, Australia. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP King, BV (reprint author), Univ Newcastle, Sch Math & Phys Sci, Callaghan, NSW 2308, Australia. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 10 TC 4 Z9 4 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 203 EP 206 AR PII S0168-583X(01)01313-1 DI 10.1016/S0168-583X(01)01313-1 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800040 ER PT J AU Weber, WJ Jiang, W Gao, F Devanathan, R AF Weber, WJ Jiang, W Gao, F Devanathan, R TI Ion-solid interactions and defects in silicon carbide SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE silicon carbide; radiation effects; defects; amorphization; ion-channeling; computer simulations ID ATOMIC-SCALE SIMULATION; DISPLACEMENT CASCADES; INDUCED AMORPHIZATION; MOLECULAR-DYNAMICS; AU RECOILS; SI AB Experimental and computational approaches are used to study the defects, defect clusters and long-range structural disorder produced by interaction of energetic ions with silicon carbide (SiC). The accumulation and recovery of disorder on the Si and C sublattices are determined by ion-beam analysis methods in channeling geometry. Ab initio calculations have determined the most stable interstitial configurations, which are consistent with multi-axial channeling measurements. Molecular dynamics (MD) methods have been used to study both the energy dependence of defect production and the dynamic processes of cascade overlap. The experimental measurements of damage accumulation and the results of MD are consistent with each other. Thus, the integration of experimental and computational studies is providing atomic-level understanding of irradiation-induced defects and disordering processes in SiC. (C) 2002 Published by Elsevier Science B.V. C1 Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. Indian Inst Technol, Dept Met Engn, Madras 600036, Tamil Nadu, India. RP Weber, WJ (reprint author), Pacific NW Natl Lab, Fundamental Sci Div, POB 999,MSIN K8-93, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012; Devanathan, Ram/C-7247-2008; OI Weber, William/0000-0002-9017-7365; Devanathan, Ram/0000-0001-8125-4237; Jiang, Weilin/0000-0001-8302-8313 NR 22 TC 5 Z9 5 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 261 EP 265 AR PII S0168-583X(01)01193-4 DI 10.1016/S0168-583X(01)01193-4 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800052 ER PT J AU Verda, RD Tesmer, JR Nastasi, M Bower, RW AF Verda, RD Tesmer, JR Nastasi, M Bower, RW TI Accurate hydrogen depth profiling by reflection elastic recoil detection analysis SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE depth profiling; energy spread; geometric alignment; energy calibration AB A technique to convert reflection elastic recoil detection analysis spectra to depth profiles, the channel-depth conversion, was introduced by Verda et al. [Nucl. Instr. and Meth. B 183 (2001) 401]. But the channel-depth conversion does not correct for energy spread, the unwanted broadening in the energy of the spectra, which can lead to errors in depth profiling. A work in progress introduces a technique that corrects for energy spread in elastic recoil detection analysis spectra, the energy spread correction [Nucl. Instr. and Meth. B 187 (2002) 383]. Together, the energy spread correction and the channel-depth conversion comprise an accurate and convenient hydrogen depth profiling method. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Davis, Davis, CA 95616 USA. RP Verda, RD (reprint author), Los Alamos Natl Lab, Mail Stop G755, Los Alamos, NM 87545 USA. NR 10 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 419 EP 422 AR PII S0168-583X(02)00473-1 DI 10.1016/S0168-583X(02)00473-1 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800083 ER PT J AU Hochbauer, T Nastasi, M Verda, RD Misra, A Henttinen, K Suni, I Lau, SS Mayer, JW AF Hochbauer, T Nastasi, M Verda, RD Misra, A Henttinen, K Suni, I Lau, SS Mayer, JW TI The use of ion channeling and elastic recoil detection in determining the mechanism of cleavage in the ion-cut process SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE ion-cut implantation; fracture mechanics; silicon on insulator ID INDUCED EXFOLIATION; SILICON; HYDROGEN; STRESS; DEPTH AB Hydrogen ion implantation in Si has been shown to be ail effective means of inducing cleavage in Si and facilitating the transfer of thin slices to other substrates. a process known as ion-cut. In our experiments silicon wafers were implanted with 40 keV protons to a variety of ion doses ranging from 5 x 10(16) to 1 x 10(17) cm (2) and Subsequently annealed at 600 degreesC. Under all of these conditions ion-cutting in the form of ''popping off'' discrete blisters was obtained, The cleavage mechanisms in these samples were studied through the combined use of Rutherford backscattering spectroscopy in channeling mode, elastic recoil detection analysis, and scanning electroil microscopy. Our analyses had shown that the cleavage location in Si is largely controlled by the lattice damage that is generated by the H-implantation process. At lower H doses, the cut location is well correlated with the damage peak and can be explained by damage-induced in-plane stress and the corresponding out-of-plane strain. However. at higher implantation doses the ion-cut location shifts to a portion of the crystal which contains lower damage and sufficient concentration of H. This effect call be explained by the changing fracture mechanics at high H concentrations in heavily damaged Si. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. VTT Elect, FIN-02044 Espoo, Finland. Univ Calif San Diego, La Jolla, CA 92093 USA. Arizona State Univ, Tempe, AZ USA. RP Hochbauer, T (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RI Misra, Amit/H-1087-2012 NR 25 TC 6 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 592 EP 597 AR PII S0168-583X(01)01306-4 DI 10.1016/S0168-583X(01)01306-4 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800119 ER PT J AU Jiang, W Weber, WJ Thevuthasan, S Shutthanandan, V AF Jiang, W Weber, WJ Thevuthasan, S Shutthanandan, V TI Deuterium channeling study of disorder in Al-2(2+)-implanted 6H-SiC SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE ion-beam irradiation; disorder accumulation and recovery; RBS and NRA channeling analyses; 6H-SiC ID IRRADIATION-INDUCED AMORPHIZATION; SILICON-CARBIDE; ANNEALING BEHAVIOR; ACCUMULATION; RECOVERY; SIMULATION; ENERGIES; CERAMICS AB Single crystal 6H-SiC wafers have been irradiated 60degrees off normal at 150, 190. 250 and 295 K using 1.1 MeV Al-2(2+) ions over fluences from 0.15 to 2.85 ions/nm(2). The accumulation and recovery of disorder on both the Si and C sublattices have been measured simultaneously using in situ 0.94 MeV D Rutherford backscattering Si-28(d,d)Si-28 and nuclear reaction C-12(d,p)C-13 along the <0 0 0 1>-axial channeling direction. The behavior of disorder accumulation and recovery on the Si and C sublattices is similar. The data suggest that a dynamic recovery stage occurs between irradiation temperatures of 190 and 250 K. At intermediate doses, isochronal annealing (20 min) results show that significant thermal recovery occurs between 420 and 720 K. Complete recovery is not observed by thermal annealing Lip to the highest temperature (870 K) used in this study. (C) 2002 Published by Elsevier Science B.V. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Jiang, W (reprint author), Pacific NW Natl Lab, POB 999 MS K8-93, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; OI Weber, William/0000-0002-9017-7365; Jiang, Weilin/0000-0001-8302-8313 NR 20 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 636 EP 640 AR PII S0168-583X(01)01194-6 DI 10.1016/S0168-583X(01)01194-6 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800128 ER PT J AU Henttinen, K Suni, T Nurmela, A Suni, I Lau, SS Hochbauer, T Nastasi, M Airaksinen, VM AF Henttinen, K Suni, T Nurmela, A Suni, I Lau, SS Hochbauer, T Nastasi, M Airaksinen, VM TI Cold ion-cutting of hydrogen implanted Si SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE silicon on insulator; hydrogen implantation; ion channeling; wafer bonding ID LAYER TRANSFER; SILICON; MECHANISM AB The strength of the H-implanted layer has been measured in (1 0 0), (1 1 1) and (1 1 0) oriented Si wafers using the crack opening method. The required annealing temperature for mechanical layer transfer increases in the order (100), (1 1 1) and (1 1 0). The damage induced by the implantation has been studied by Rutherford backscattering in the channeling mode (RBS/C). The same methods have been used to investigate the influence of boron and arsenic doping on the mechanical exfoliation. Boron doping reduces the strength of the H-implanted layer thereby enabling mechanical layer transfer at temperatures below 200 degreesC. We found that the exfoliation takes place closer to the wafer surface in highly boron doped Si as compared to the undoped Si. The RBS damage peak also appears to move closer to the surface when the boron concentration of the H-implanted layer is >10(19) cm(-3). No lowering of the exfoliation temperature was observed for compensated and arsenic doped Si layers. We suggest that the lowering of the exfoliation temperature with increasing boron doping is related to Si-H bonds associated with the neutralization of shallow acceptors by hydrogen. (C) 2002 Elsevier Science B.V. All rights reserved. C1 VTT, Ctr Microelect, FIN-02150 Espoo, Finland. Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Okmet Oyj, FIN-01510 Vantaa, Finland. RP Henttinen, K (reprint author), VTT, Ctr Microelect, Teknii Kantie 17, FIN-02150 Espoo, Finland. NR 12 TC 19 Z9 19 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 761 EP 766 AR PII S0168-583X(01)01209-5 DI 10.1016/S0168-583X(01)01209-5 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800153 ER PT J AU Azevedo, GD Ridgway, MC Yu, KM Glover, CJ Foran, GJ AF Azevedo, GD Ridgway, MC Yu, KM Glover, CJ Foran, GJ TI Structural characterization of amorphised InAs with synchrotron radiation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE InAs; EXAFS; ion implantation; amorphous solids AB Extended X-ray absorption fine structure measurements have been utilized to determine the structural parameters of InAs amorphised by ion implantation. Relative to crystalline standards, increases in bond length and Debye-Walter factor were apparent. Our results indicate that a total coordination number of four atoms, as observed in the crystalline phase, is retained in the amorphous material. Furthermore, homopolar bonding, forbidden in the crystalline phase, is present in the amorphous material and, apparently, in amorphous III-V semiconductors in general. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Uppsala Univ, Max Lab, Lund, Sweden. Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia. RP Azevedo, GD (reprint author), Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia. RI Yu, Kin Man/J-1399-2012; Ridgway, Mark/D-9626-2011; Azevedo, Gustavo/E-9399-2010 OI Yu, Kin Man/0000-0003-1350-9642; Ridgway, Mark/0000-0002-0642-0108; Azevedo, Gustavo/0000-0003-0301-3280 NR 11 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 851 EP 855 AR PII S0168-583X(02)00471-8 DI 10.1016/S0168-583X(02)00471-8 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800171 ER PT J AU Ishimaru, M Bae, IT Ohkubo, T Hirotsu, Y Sickafus, KE AF Ishimaru, M Bae, IT Ohkubo, T Hirotsu, Y Sickafus, KE TI Characterization of ion-beam-induced amorphous structures by advanced electron microscopy SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion-Beam Analysis (IBA-15) CY JUL 15-20, 2001 CL CAIRNS, AUSTRALIA DE silicon carbide; semiconductor-on-insulator; amorphous; nano-beam electron diffraction; transmission electron microscopy ID IMPLANTED SILICON-CARBIDE; ENERGY-LOSS SPECTROSCOPY AB Ion-beam-induced amorphous structures of silicon carbide (SiC) have been characterized by cross-sectional transmission electron microscopy. Single crystals of 6H-SiC with [0001] orientation were irradiated with 180 keV oxygen tons at elevated temperature to a fluence of 1.4 x 10(18) O-/cm(2). it was found that a layered amorphous structure is formed inside the irradiated crystal. The intensities of halo patterns obtained by nano-beam electron diffraction techniques were analyzed quantitatively using imaging plates Lis a recording material. Pair distribution functions extracted by Fourier transforming nano-beam electron diffraction patterns indicated that the layered amorphous structure is due to compositional variations of silicon. carbon, and oxygen. (C) 2002 Flsevier Science B.V. All rights reserved. C1 Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan. Osaka Univ, Dept Mat Sci & Engn, Suita, Osaka 5650871, Japan. Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Ishimaru, M (reprint author), Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan. NR 13 TC 2 Z9 2 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD MAY PY 2002 VL 190 BP 882 EP 886 AR PII S0168-583X(01)01223-X DI 10.1016/S0168-583X(01)01223-X PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 560YK UT WOS:000176108800178 ER PT J AU Richards, DG Gockeler, M Horsley, R Pleiter, D Rakow, PEL Schierholz, G Maynard, CM AF Richards, DG Gockeler, M Horsley, R Pleiter, D Rakow, PEL Schierholz, G Maynard, CM CA LHPC Collaboration QCDSF Collaboration UKQCD Collaboration TI Excited nucleon spectrum using a non-perturbatively improved clover fermion action SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Lattice Hadron Physics CY JUL 09-18, 2001 CL CAIRNS, AUSTRALIA SP CSSM, Natl Inst Theoret Phys, Thomas Jefferson Natl Lab ID NONPERTURBATIVE O(A) IMPROVEMENT; LATTICE QCD; WILSON FERMIONS; MASSES; SCALE AB We discuss the extraction of negative-parity baryon masses from lattice QCD calculations. The mass of the lowest-lying negative-parity J = 1/2(-) state is computed in quenched lattice QCD using an O(a)-improved clover fermion action, and a splitting found with the nucleon mass. The calculation is performed on two lattice volumes, and three lattice spacings enabling a study of both finite-volume and finite-lattice-spacing uncertainties. A measurement of the first excited radial excitation of the nucleon finds a mass considerably larger than that of the negative-parity ground state, in accord with other lattice determinations but in disagreement with experiment. Results are also presented for the lightest negative-parity I = 3/2 state. C1 Jefferson Lab, Newport News, VA 23606 USA. Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. DESY, John von Neumann Inst Comp, NIC, D-15738 Zeuthen, Germany. Humboldt Univ, Inst Phys, D-10115 Berlin, Germany. DESY, D-22603 Hamburg, Germany. Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. RP Richards, DG (reprint author), Jefferson Lab, MS 12H2,12000 Jefferson Ave, Newport News, VA 23606 USA. NR 24 TC 32 Z9 32 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 MAY PY 2002 VL 109 BP 89 EP 95 AR PII S0920-5632(02)01395-6 DI 10.1016/S0920-5632(02)01395-6 PG 7 WC Physics, Particles & Fields SC Physics GA 563NM UT WOS:000176262500016 ER PT J AU Melnitchouk, W Bilson-Thompson, S Bonnet, FDR Coddington, PD Leinweber, DB Williams, AG Zanotti, JM Zhang, JB Lee, FX AF Melnitchouk, W Bilson-Thompson, S Bonnet, FDR Coddington, PD Leinweber, DB Williams, AG Zanotti, JM Zhang, JB Lee, FX TI Baryon resonances from a novel fat-link fermion action SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Lattice Hadron Physics CY JUL 09-18, 2001 CL CAIRNS, AUSTRALIA SP CSSM, Natl Inst Theoret Phys, Thomas Jefferson Natl Lab ID SPECTRUM AB We present first results for masses of positive and negative parity excited baryons in lattice QCD using an O(a(2)) improved gluon action and a Fat Link Irrelevant Clover (FLIC) fermion action in which only the irrelevant operators are constructed with fat links. The results are in agreement with earlier calculations of N* resonances using improved actions and exhibit a clear mass. splitting between the nucleon and its chiral partner, even for the Wilson fermion action. The results also indicate a splitting between the lowest J(P) = (1)/(-)(2)states for the two standard nucleon interpolating fields. C1 Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia. Jefferson Lab, Newport News, VA 23606 USA. George Washington Univ, Dept Phys, Ctr Nucl Studies, Washington, DC 20052 USA. RP Melnitchouk, W (reprint author), Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. RI Zanotti, James/H-8128-2012; Williams, Anthony/I-6698-2012; Leinweber, Derek/J-6705-2013; OI Zanotti, James/0000-0002-3936-1597; Leinweber, Derek/0000-0002-4745-6027; Lee, Frank/0000-0001-8169-3440 NR 12 TC 10 Z9 10 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 MAY PY 2002 VL 109 BP 96 EP 100 AR PII S0920-5632(02)01396-8 DI 10.1016/S0920-5632(02)01396-8 PG 5 WC Physics, Particles & Fields SC Physics GA 563NM UT WOS:000176262500017 ER PT J AU Zanotti, JM Bilson-Thompson, S Bonnet, FDR Coddington, PD Leinweber, DB Williams, AG Zhang, JB Melnitchouk, W Lee, FX AF Zanotti, JM Bilson-Thompson, S Bonnet, FDR Coddington, PD Leinweber, DB Williams, AG Zhang, JB Melnitchouk, W Lee, FX TI Novel fat-link fermion actions SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Lattice Hadron Physics CY JUL 09-18, 2001 CL CAIRNS, AUSTRALIA SP CSSM, Natl Inst Theoret Phys, Thomas Jefferson Natl Lab ID LATTICE QCD; CONTINUUM-LIMIT; IMPROVEMENT AB The hadron mass spectrum is calculated in lattice QCD using a novel fat-link clover fermion action in which only the irrelevant operators of the fermion action are constructed using smeared links. The simulations are performed on a 16(3) x 32 lattice with a lattice spacing of a = 0.125 fm. We compare actions with n = 4 and 12 smearing sweeps with a smearing fraction of 0.7. The n = 4 Fat-Link Irrelevant Clover (FLIC) action provides scaling which is superior to mean-field improvement, and offers advantages over nonperturbative O(a) improvement. C1 Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia. Jefferson Lab, Newport News, VA 23606 USA. George Washington Univ, Dept Phys, Ctr Nucl Studies, Washington, DC 20052 USA. RP Zanotti, JM (reprint author), Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. RI Zanotti, James/H-8128-2012; Williams, Anthony/I-6698-2012; Leinweber, Derek/J-6705-2013; OI Zanotti, James/0000-0002-3936-1597; Leinweber, Derek/0000-0002-4745-6027; Lee, Frank/0000-0001-8169-3440 NR 16 TC 12 Z9 12 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 MAY PY 2002 VL 109 BP 101 EP 105 AR PII S0920-5632(02)01397-X DI 10.1016/S0920-5632(02)01397-X PG 5 WC Physics, Particles & Fields SC Physics GA 563NM UT WOS:000176262500018 ER PT J AU Edwards, RG Heller, UM AF Edwards, RG Heller, UM TI Probing the QCD vacuum with overlap fermions SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Lattice Hadron Physics CY JUL 09-18, 2001 CL CAIRNS, AUSTRALIA SP CSSM, Natl Inst Theoret Phys, Thomas Jefferson Natl Lab ID DIRAC OPERATOR; LATTICE QCD; INSTANTONS AB We use low lying eigenvectors of the overlap-Dirac operator as a probe of the QCD vacuum. If instantons play a significant role one would expect the low lying eigenmodes of the overlap-Dirac operator to consist mainly of the mixed "would be zero modes". Then, the eigenmodes should exhibit local chirality. Studying a recently introduced local chirality parameter, we find evidence supporting this picture. C1 Jefferson Lab, Newport News, VA 23606 USA. Florida State Univ, CSIT, Tallahassee, FL 32306 USA. RP Edwards, RG (reprint author), Jefferson Lab, 12000 Jefferson Ave,MS 12H2, Newport News, VA 23606 USA. OI Heller, Urs M./0000-0002-2780-5584 NR 18 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 MAY PY 2002 VL 109 BP 124 EP 128 AR PII S0920-5632(02)01401-9 DI 10.1016/S0920-5632(02)01401-9 PG 5 WC Physics, Particles & Fields SC Physics GA 563NM UT WOS:000176262500022 ER PT J AU Baker, RS AF Baker, RS TI A block adaptive mesh refinement algorithm for the neutral particle transport equation SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID SHOCK HYDRODYNAMICS AB We describe the development and implementation of a block-based adaptive mesh refinement (AMR) algorithm for solving the discrete ordinates neutral particle transport equation. AMR algorithms allow mesh refinement in areas of interest without requiring the extension of this refinement throughout the entire problem geometry, minimizing the number of computational cells required for calculations. The block-based AMR algorithm described here is a hybrid between traditional cell or patch-based approaches and is designed to allow an efficient parallel solution of the transport equation while still reducing the cell count. This paper discusses the data structure implementation and CPU/memory efficiency for our Block AMR method, the equations and procedures used in mapping edge fluxes between blocks of different refinement levels for both diamond and linear discontinuous spatial discretizations, effects of AMR on mesh convergence, and our approach to parallelization. Comparisons between our Block AMR method and a traditional single-level mesh are presented for a sample brachytherapy problem. The Block AMR results are shown to be significantly faster for this problem (on at least a few processors), while still returning an accurate solution. C1 Los Alamos Natl Lab, Transport Methods Grp, Los Alamos, NM USA. RP Baker, RS (reprint author), Los Alamos Natl Lab, Transport Methods Grp, MS D409, Los Alamos, NM USA. NR 21 TC 16 Z9 16 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD MAY PY 2002 VL 141 IS 1 BP 1 EP 12 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 541RQ UT WOS:000174998000001 ER PT J AU Galperin, A Shwageraus, E Todosow, M AF Galperin, A Shwageraus, E Todosow, M TI Assessment of homogeneous thorium/uranium fuel for pressurized water reactors SO NUCLEAR TECHNOLOGY LA English DT Article DE thorium fuel; proliferation resistance; seed blanket AB The homogeneous ThO2-UO2 fuel cycle option for a pressurized water reactor (PWR) of current technology is investigated. The fuel cycle assessment was carried out by calculating the main performance parameters: natural uranium and separative work requirements, fuel cycle cost, and proliferation potential of the spent fuel. These performance parameters were compared with a corresponding slightly enriched (all-U) fuel cycle applied to a PWR of current technology. The main conclusion derived from this comparison is that fuel cycle requirements and fuel cycle cost for the mixed Th/U fuel are higher in comparison with those of the all-U fuel. A comparison and analysis of the quantity and isotopic composition of discharged Pu indicate that the Th/U fuel cycle provides only a moderate improvement of the proliferation resistance. Thus, the overall conclusion of the investigation is that there is no economic justification to introduce Th into a light water reactor fuel cycle as a homogeneous ThO2-UO2 mixture. C1 Ben Gurion Univ Negev, IL-84105 Beer Sheva, Israel. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Galperin, A (reprint author), Ben Gurion Univ Negev, POB 653, IL-84105 Beer Sheva, Israel. RI Shwageraus, Eugene/D-5189-2012 OI Shwageraus, Eugene/0000-0002-7309-4920 NR 9 TC 14 Z9 14 U1 3 U2 5 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 MAY PY 2002 VL 138 IS 2 BP 111 EP 122 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 543QM UT WOS:000175112700002 ER PT J AU McFarlane, J Wren, JC Lemire, RJ AF McFarlane, J Wren, JC Lemire, RJ TI Chemical speciation of iodine source term to containment SO NUCLEAR TECHNOLOGY LA English DT Article DE iodine behavior; chemical thermodynamic modeling; Knudsen-cell effusion ID CESIUM MOLYBDATE; VAPORIZATION; THERMODYNAMICS; DIOXIDE; UO2+X AB Iodine species released into a reactor containment building following a loss-of-coolant accident is determined by the relative timing and quantity of iodine and other fission products released from the fuel, chemical thermodynamics in the fuel channel, and reaction kinetics in cooler regions of the heat transport system (HTS). Iodine speciation along the transport path from the fuel to cooler regions of the HTS and into containment is evaluated using chemical thermodynamics calculations, leading to a prediction of the volatile iodine mole fraction that theoretically would enter containment. Sensitivities to a decrease in the cesium-to-iodine ratio, a decrease in iodine concentration in the coolant, and an increase in oxygen partial pressure are tested. The role of the presence of other elements, namely, molybdenum, tellurium, uranium, and lithium, are also evaluated. Under most conditions, the mole fraction of iodine entering containment in volatile form is found to be <0.1%. There are circumstances, however, when cesium iodide can be destabilized by a low cesium-to-molybdenum ratio in an oxidizing atmosphere such as steam. To further explore this situation and to validate the code, chemical equilibrium calculations are also compared to earlier Knudsen-cell experimental studies of the interaction of cesium, iodine, molybdenum, and urania. In these experiments, the partial pressures of cesium molybdate and elemental iodine are measured as a function of temperature over the range 1100 to 1500 K. The calculated Cs2MOO4 vapor pressures agree with the experimental results within an order of magnitude at temperatures up to 1200 K; and between 770 and 1150 K, the agreement is within a factor of 2 to 5 depending on the chemical system. C1 Whiteshell Labs, Containment Anal Branch Pinawa, Pinawa, MB R0E 1L0, Canada. Atom Energy Canada Ltd, Chalk River Nucl Labs, Fuel Safety Branch, Chalk River, ON K0J 1J0, Canada. RP McFarlane, J (reprint author), Oak Ridge Natl Lab, Box 2008, Oak Ridge, TN 37831 USA. RI McFarlane, Joanna/C-5998-2016 OI McFarlane, Joanna/0000-0002-4112-5104 NR 43 TC 14 Z9 14 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 MAY PY 2002 VL 138 IS 2 BP 162 EP 178 PG 17 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 543QM UT WOS:000175112700005 ER PT J AU Carrington, DB Pepper, DW AF Carrington, DB Pepper, DW TI Convective heat transfer downstream of a 3-D backward-facing step SO NUMERICAL HEAT TRANSFER PART A-APPLICATIONS LA English DT Article ID NAVIER-STOKES EQUATIONS; FINITE-ELEMENT METHOD; FLOW; SEMIIMPLICIT AB Numerical solutions are obtained for fluid flow and heat transfer downstream of a 3-D backward-facing step within a duct. A heat flux is applied along the bottom surface downstream of the step. The dimensions downstream of the step are 30Hx12HxH, where H=1 cm (channel height); uniform flow enters a 20Hx12HxH/2 channel upstream of the step. The numerical model is based on a modified Petrov-Galerkin finite element technique that incorporates sparse storage solution with mass lumping. A projection algorithm is used to solve the primitive equations of motion. Upper and lower recirculation zones in the 3-D solutions are very different from 2-D results. Solutions obtained for Re = 400, 800, and 1200 are presented that illustrate changing recirculation and vortex zones. A time history shows the evolution of velocities along the centerline at Re = 800. Bulk Nusselt numbers converge to experimental values downstream of the step where the flow returns to a fully developed parabolic profile. C1 Univ Nevada, Dept Mech Engn, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Pepper, DW (reprint author), Univ Nevada, Dept Mech Engn, 4505 Maryland Pkwy, Las Vegas, NV 89154 USA. NR 34 TC 19 Z9 19 U1 0 U2 5 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1040-7782 J9 NUMER HEAT TR A-APPL JI Numer. Heat Tranf. A-Appl. PD MAY PY 2002 VL 41 IS 6-7 BP 555 EP 578 DI 10.1080/104077802317418214 PG 24 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA 555MT UT WOS:000175798400001 ER PT J AU Shapira, Y AF Shapira, Y TI Adequacy of finite difference schemes for convection-diffusion equations SO NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS LA English DT Article DE finite difference schemes; convection-diffusion equations ID RECIRCULATING-FLOWS; CONVERGENCE AB Finite difference schemes for the numerical solution of singularly perturbed convection problems on uniform grids are studied in the limit case where the viscosity and the meshsize approach zero at the same time. The present error estimates are given in terms of order of magnitude in the above limit process and are useful in a priori choosing adequate schemes and meshsizes for boundary-layer problems and problems with closed characteristics. (C) 2002 Wiley Periodicals, Inc. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Shapira, Y (reprint author), POB 3377, IL-26133 K Motzkin, Israel. NR 18 TC 4 Z9 4 U1 0 U2 0 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0749-159X J9 NUMER METH PART D E JI Numer. Meth. Part Differ. Equ. PD MAY PY 2002 VL 18 IS 3 BP 280 EP 295 DI 10.1002/num.10007 PG 16 WC Mathematics, Applied SC Mathematics GA 542JF UT WOS:000175039200002 ER PT J AU Chapman, HN Nugent, KA AF Chapman, HN Nugent, KA TI X-ray pulse compression using strained crystals SO OPTICS COMMUNICATIONS LA English DT Article DE strain gradient; chirped pulse; FEL; pulse compression ID COHERENT-LIGHT SOURCE; DIFFRACTION; OPTICS; LASER AB The use of strained crystals to time-compress chirped X-ray free-electron laser (FEL) pulses is proposed. The chirped beam diffracts from a crystal in which the strain varies with depth. Low-Z crystals are favored to reduce absorption over the required path lengths and small Bragg angles are favored to increase the diffraction efficiency of the strained crystal. The best compression ratios found for a 230 fs, 0.5% chirped beam at a wavelength of 1.54 Angstrom are achieved with graphite and diamond crystals. The calculations indicate for graphite that the pulse may be compressed in time by a factor of up to 10 with an efficiency such that this produces 6.8 times as many photons as a comparable time-slicing method. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. RP Chapman, HN (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. RI Chapman, Henry/G-2153-2010; Nugent, Keith/J-2699-2012; Nugent, Keith/I-4154-2016 OI Chapman, Henry/0000-0002-4655-1743; Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 21 TC 8 Z9 8 U1 2 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD MAY 1 PY 2002 VL 205 IS 4-6 BP 351 EP 359 AR PII S0030-4018(02)01253-1 DI 10.1016/S0030-4018(02)01253-1 PG 9 WC Optics SC Optics GA 554KL UT WOS:000175734500017 ER PT J AU Bartels, RA Paul, A Murnane, MM Kapteyn, HC Backus, S Liu, Y Attwood, DT AF Bartels, RA Paul, A Murnane, MM Kapteyn, HC Backus, S Liu, Y Attwood, DT TI Absolute determination of the wavelength and spectrum of an extreme-ultraviolet beam by a Young's double-slit measurement SO OPTICS LETTERS LA English DT Article ID COHERENCE AB The interference pattern produced by irradiation of a pair of pinholes with a beam contains information on both the spatial and the temporal coherence properties of the beam, as well as its power spectrum. We demonstrate experimentally for what is believed to be the first time that the spectrum of an extreme-ultraviolet (EUV) beam can be obtained from a measurement. of the interference pattern produced by a pinhole pair. This approach offers a convenient method of making absolute wavelength and relative spectral intensity calibrations in the EUV. (C) 2002 Optical Society of America. C1 Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. Univ Calif Berkeley, Ctr Xray Opt, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Appl Sci & Technol Grad Grp, Berkeley, CA 94720 USA. RP Bartels, RA (reprint author), Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. RI Backus, Sterling/C-2506-2008; Kapteyn, Henry/H-6559-2011 OI Kapteyn, Henry/0000-0001-8386-6317 NR 10 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 MAY 1 PY 2002 VL 27 IS 9 BP 707 EP 709 DI 10.1364/OL.27.000707 PG 3 WC Optics SC Optics GA 546QC UT WOS:000175284000011 PM 18007906 ER PT J AU Allcock, B Bester, J Bresnahan, J Chervenak, AL Foster, I Kesselman, C Meder, S Nefedova, V Quesnel, D Tuecke, S AF Allcock, B Bester, J Bresnahan, J Chervenak, AL Foster, I Kesselman, C Meder, S Nefedova, V Quesnel, D Tuecke, S TI Data management and transfer in high-performance computational grid environments SO PARALLEL COMPUTING LA English DT Article DE globus; data grid; GridFTP; replica management AB An emerging class of data-intensive applications involve the geographically dispersed extraction of complex scientific information from very large collections of measured or computed data. Such applications arise, for example, in experimental physics, where the data in question is generated by accelerators, and in simulation science, where the data is generated by super-computers. So-called Data Grids provide essential infrastructure for such applications, much as the Internet provides essential services for applications such as e-mail and the Web. We describe here two services that we believe are fundamental to any Data Grid: reliable, high-speed transport and replica management. Our high-speed transport service, GridFTP, extends the popular FTP protocol with new features required for Data Grid applications, such as striping and partial file access. Our replica management service integrates a replica catalog with GridFTP transfers to provide for the creation, registration, location, and management of dataset replicas. We present the design of both services and also preliminary performance results. Our implementations exploit security and other services provided by the Globus Toolkit. (C) 2002 Published by Elsevier Science B.V. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Univ So Calif, Inst Informat Sci, Marina Del Rey, CA 90292 USA. Univ Chicago, Dept Comp Sci, Computat Inst, Chicago, IL 60637 USA. RP Allcock, B (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. OI Kesselman, Carl/0000-0003-0917-1562; Tuecke, Steven/0000-0003-2038-2512 NR 16 TC 226 Z9 240 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8191 J9 PARALLEL COMPUT JI Parallel Comput. PD MAY PY 2002 VL 28 IS 5 BP 749 EP 771 AR PII S0167-8191(02)00094-7 DI 10.1016/S0167-8191(02)00094-7 PG 23 WC Computer Science, Theory & Methods SC Computer Science GA 584DQ UT WOS:000177452300005 ER PT J AU Mercer, RE Barron, JL Bruen, AA Cheng, D AF Mercer, RE Barron, JL Bruen, AA Cheng, D TI Fuzzy points: algebra and application SO PATTERN RECOGNITION LA English DT Article DE fuzzy storms; fuzzy vectors; fuzzy angles; fuzzy algebra; Doppler radar imagery; tracking deformable objects ID TRACKING; GEOMETRY; IMAGES AB A fuzzy point is a region representing the uncertain location of a normal Euclidean point. A fuzzy point in the plane is considered to be a closed disk (a circle and its interior). The algebra of fuzzy points (which includes fuzzy vectors and fuzzy angles) is presented. Since fuzzy points are represented as closed disks, the lengths of fuzzy vectors, and the angles between fuzzy vectors can be viewed as properties of circles in the plane. Methods to compute the magnitude of a fuzzy angle are given. An application of fuzzy point algebra to the problem of detecting and tracking storms in Doppler radar image sequences, which motivates this work, is discussed. (C) 2002 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved. C1 Univ Western Ontario, Dept Comp Sci, London, ON N6A 5B7, Canada. Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA. RP Barron, JL (reprint author), Univ Western Ontario, Dept Comp Sci, London, ON N6A 5B7, Canada. NR 31 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0031-3203 J9 PATTERN RECOGN JI Pattern Recognit. PD MAY PY 2002 VL 35 IS 5 BP 1153 EP 1166 AR PII S0031-3203(01)00110-8 DI 10.1016/S0031-3203(01)00110-8 PG 14 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA 525XE UT WOS:000174098700015 ER PT J AU Allen, JW Aronson, M Boebinger, GS Broholm, CL Cooper, SL Crow, JE Hammel, PC Lander, G AF Allen, JW Aronson, M Boebinger, GS Broholm, CL Cooper, SL Crow, JE Hammel, PC Lander, G TI Future probes in materials science SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT Workshop on Future of Materials Physics - A Festschrift for Zachary Fisk in Honor of his 60th Birthday CY AUG 13-15, 2001 CL LOS ALAMOS, NEW MEXICO DE user facilities; probes; pressure; magnetic fields; spectroscopies ID RESONANCE FORCE MICROSCOPY; NUCLEAR-MAGNETIC-RESONANCE; FERROMAGNETIC-RESONANCE; MECHANICAL DETECTION; HIGH-PRESSURE; SUPERCONDUCTIVITY; DYNAMICS; STATE; EXCITATIONS; MANGANITES AB Advancements in condensed matter science have been primarily driven by the discovery and refinement of new materials and innovative approaches to characterization tools. There are many examples where advances in spectroscopic techniques including electron and magnetic resonance, new and more accessible approaches to phase space (pressure, magnetic fields and temperature), and the development of major facilities, specifically photon and neutron sources have profoundly impacted the development and accelerated the advancement of condensed matter sciences. The importance that nations attach to future probes for materials sciences is reflected worldwide in the major investments being made in both large facilities and researcher driven instrumentation development. Within this presentation, several instrument areas are reviewed and opportunities for the development of future probes for materials science are discussed. (C) 2002 Published by Elsevier Science B.V. C1 NHMFL, Tallahassee, FL 32310 USA. Univ Michigan, Randall Lab, Dept Phys, Ann Arbor, MI 48109 USA. Los Alamos Natl Lab, MST, NHMFL, Los Alamos, NM 87545 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Illinois, Loomis Lab Phys, Urbana, IL 61801 USA. Los Alamos Natl Lab, MSTDO, Los Alamos, NM 87545 USA. RP Crow, JE (reprint author), NHMFL, 1800 E Paul Dirac Dr, Tallahassee, FL 32310 USA. RI Broholm, Collin/E-8228-2011; Hammel, P Chris/O-4845-2014 OI Broholm, Collin/0000-0002-1569-9892; Hammel, P Chris/0000-0002-4138-4798 NR 44 TC 1 Z9 1 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 318 IS 1 BP 12 EP 23 AR PII S0921-4526(02)00768-8 DI 10.1016/S0921-4526(02)00768-8 PG 12 WC Physics, Condensed Matter SC Physics GA 567AA UT WOS:000176459400004 ER PT J AU Bishop, AR AF Bishop, AR TI Functional complexity in correlated electron matter SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT Workshop on Future of Materials Physics - A Festschrift for Zachary Fisk in Honor of his 60th Birthday CY AUG 13-15, 2001 CL LOS ALAMOS, NEW MEXICO DE complexity; multiscale ID TRANSITION-METAL OXIDES; LONG-RANGE INTERACTIONS; PEIERLS-HUBBARD MODEL; CHARGE LOCALIZATION; GROUND-STATES; LATTICE; EXCITATIONS; SPIN AB We outline several themes which have now emerged in both organic and inorganic correlated electronic materials: the prevalence of intrinsic complexity realized in the coexistence or competition among broken-symmetry ground states; the origin of landscapes in coupled spin, charge and lattice (orbital) degrees-of-freedom; the importance of co-existing short- and long-range forces; and the importance of multiscale complexity for key material properties, including hierarchies of functional, connected scales, coupled intrinsic inhomogeneities in spin, charge and lattice, consequent intrinsic multiple timescales, and the importance of multifunctional "electro-elastic" materials. (C) 2002 Published by Elsevier Science B.V. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Bishop, AR (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 35 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 318 IS 1 BP 33 EP 38 AR PII S0921-4526(02)00771-8 DI 10.1016/S0921-4526(02)00771-8 PG 6 WC Physics, Condensed Matter SC Physics GA 567AA UT WOS:000176459400007 ER PT J AU Hecker, SS AF Hecker, SS TI A tribute to Zachary Fisk SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT Workshop on Future of Materials Physics - A Festschrift for Zachary Fisk in Honor of his 60th Birthday CY AUG 13-15, 2001 CL LOS ALAMOS, NEW MEXICO DE Zachary Fisk AB We pay tribute to Zachary Fisk's contributions to materials physics on the occasion of his 60th birthday. His theme of "new physics through new materials" was made possible by a love of chemistry, a thorough grasp of physics, and a life-long association with the best researchers in the field. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, MSTDO, Los Alamos, NM 87545 USA. RP Hecker, SS (reprint author), Los Alamos Natl Lab, MSTDO, MS G754, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 318 IS 1 BP 57 EP 60 AR PII S0921-4526(02)00774-3 DI 10.1016/S0921-4526(02)00774-3 PG 4 WC Physics, Condensed Matter SC Physics GA 567AA UT WOS:000176459400010 ER PT J AU Sarrao, JL AF Sarrao, JL TI From Ce3Bi4Pt3 to CeCoIn5: 10 years of new materials research at LANL SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT Workshop on Future of Materials Physics - A Festschrift for Zachary Fisk in Honor of his 60th Birthday CY AUG 13-15, 2001 CL LOS ALAMOS, NM DE new materials; heavy fermions; CeMIn5 ID HAAS-VAN-ALPHEN; FERMION SUPERCONDUCTOR CECOIN5; MASSIVE ELECTRON STATE; UNCONVENTIONAL SUPERCONDUCTIVITY; PRESSURE; CERHIN5; CEIRIN5; YBBIPT; MAGNETISM; SURFACE AB We review the serendipitous but directed path from Kondo insulator Ce3Bi4Pt3 to heavy-Fermion superconductor CeCoIn5 as exemplary of Zachary Fisk's unique approach to new materials synthesis. The significance as well as the current status of the CeMIn5 materials is also discussed. Finally, based on these insights, we speculate as to paths forward in exploratory materials research. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Mail Stop K764, Los Alamos, NM 87545 USA. EM sarrao@lanl.gov NR 43 TC 2 Z9 2 U1 3 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 EI 1873-2135 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 318 IS 1 BP 87 EP 91 AR PII S0921-4526(02)00779-2 DI 10.1016/S0921-4526(02)00779-2 PG 5 WC Physics, Condensed Matter SC Physics GA 567AA UT WOS:000176459400015 ER PT J AU Egami, T Chung, JH McQueeney, RJ Yethiraj, M Mook, HA Frost, C Petrov, Y Dogan, F Inamura, Y Arai, M Tajima, S Endoh, Y AF Egami, T Chung, JH McQueeney, RJ Yethiraj, M Mook, HA Frost, C Petrov, Y Dogan, F Inamura, Y Arai, M Tajima, S Endoh, Y TI Electron-phonon interactions in HTSC cuprates SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter, Phonons 2001 CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NH HO DARTMOUTH COLL DE high-temperature superconductivity; neutron scattering; electron-phonon coupling ID HIGH-TC SUPERCONDUCTIVITY; OXIDE SUPERCONDUCTORS; LO PHONONS; CRYSTAL; GAP; YBA2CU3O7-DELTA; ANISOTROPY; STRIPES AB Phonons have been generally considered to be irrelevant to the high-temperature superconductivity in the cuprates. However, such a bias is usually based upon the assumption of conventional electron-phonon coupling, while in the cuprates the coupling can be rather unconventional because of strong electron correlation. We present the results of our recent measurements of phonon dispersion in YBa2Cu3O6+x by inelastic neutron scattering. These suggest certain phonon modes interact strongly with electrons and are closely involved in the superconductivity phenomenon with possible contribution to pairing. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA. Univ Penn, LRSM, Philadelphia, PA 19104 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA. Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA. KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 305, Japan. Int Superconduct Technol Ctr, Superconduct Res Lab, Tokyo 1350062, Japan. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 980, Japan. RP Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA. EM egami@seas.upenn.edu RI McQueeney, Robert/A-2864-2016 OI McQueeney, Robert/0000-0003-0718-5602 NR 22 TC 11 Z9 11 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 EI 1873-2135 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 62 EP 68 AR PII S0921-4526(02)00426-X DI 10.1016/S0921-4526(02)00426-X PG 7 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400011 ER PT J AU Keppens, V McGuire, MA Teklu, A Laermans, C Sales, BC Mandrus, D Chakoumakos, BC AF Keppens, V McGuire, MA Teklu, A Laermans, C Sales, BC Mandrus, D Chakoumakos, BC TI Glasslike excitations in single crystalline Sr8Ga16Ge30 clathrates SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE elastic properties; tunneling states; clathrates ID ELASTIC PROPERTIES; AMORPHOUS SOLIDS AB Low-temperature ultrasonic attenuation and resonant ultrasound spectroscopy (RUS) data are reported on single crystals of the semiconductor Sr8Ga16Ge30. The attenuation shows a strikingly glasslike behavior, implying that the elastic properties of the clathrate crystal at low temperatures (T < 1 K) are dominated by the presence of tunneling states. At slightly higher temperatures, the RUS data reflect the presence of a 2-level system with an energy-spacing of 45 K. The origin of these low-energy excitations is found in the 'rattling' Sr-atom, which occupies a fourfold split site in the clathrate structure. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA. Univ Mississippi, Dept Phys, University, MS 38677 USA. Katholieke Univ Leuven, Dept Phys, B-3001 Louvain, Belgium. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Keppens, V (reprint author), Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA. RI McGuire, Michael/B-5453-2009; Mandrus, David/H-3090-2014; Chakoumakos, Bryan/A-5601-2016 OI McGuire, Michael/0000-0003-1762-9406; Chakoumakos, Bryan/0000-0002-7870-6543 NR 19 TC 28 Z9 28 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 95 EP 100 AR PII S0921-4526(02)00431-3 DI 10.1016/S0921-4526(02)00431-3 PG 6 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400016 ER PT J AU Kolesnikov, AI Antonov, VE Fedotov, VK Grosse, G Ivanov, AS Wagner, FE AF Kolesnikov, AI Antonov, VE Fedotov, VK Grosse, G Ivanov, AS Wagner, FE TI Lattice dynamics of high-pressure hydrides of the group VI-VIII transition metals SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE metal hydrides; neutron spectroscopy ID INELASTIC NEUTRON-SCATTERING; GAMMA-MANGANESE HYDRIDE; VIBRATIONAL-STATES; SINGLE-CRYSTAL; IRON HYDRIDE; AB-INITIO; PALLADIUM; HYDROGEN; ANISOTROPY; SPECTRA AB Monohydrides of the group VI-VIII transition metals Cr, Mn, Fe, Co, Ni, Mo, Rh and Pd are synthesised under high hydrogen pressures and elevated temperatures and studied by inelastic neutron scattering (INS) at ambient pressure and low temperatures. In the measured INS spectra, the energy of the main optical H peak exhibits a strong monotonic increase as a function of the nearest hydrogen-metal distance in the hydrides of both 3d- and 4d-metals, respectively. The spectra for FCC NiH and PdH appear strongly anisotropic at energy transfers above the fundamental band of optical hydrogen vibrations, while those for FCC PdD do not show a significant directional dependence at energies of the second optical D band. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, IPNS, Argonne, IL 60439 USA. RAS, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia. Tech Univ Munich, Phys Dept E 15, D-85747 Garching, Germany. Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France. RP Kolesnikov, AI (reprint author), Argonne Natl Lab, IPNS, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Kolesnikov, Alexander/I-9015-2012 OI Kolesnikov, Alexander/0000-0003-1940-4649 NR 15 TC 5 Z9 5 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 158 EP 161 AR PII S0921-4526(02)00447-7 DI 10.1016/S0921-4526(02)00447-7 PG 4 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400032 ER PT J AU Tu, JJ Homes, CC Gu, GD Strongin, M AF Tu, JJ Homes, CC Gu, GD Strongin, M TI A systematic optical study of phonon properties in optimally doped Bi2Sr2CaCu2O8+delta single crystals SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE infrared spectroscopy; phonons; high T-c cuprates ID ANISOTROPY AB A systematic optical study of infrared-active phonons is carried out for optimally doped Bi2SrCaCuO2O8+delta (Bi2212) single crystals with E-vector along c-axis as well as in the ab-plane at 295 K. Strong phonon anisotropy has been observed in our ab-plane conductivity measurements. Ten infrared-active phonons have been observed along c-axis. Many of these c-axis infrared-active phonons have energies that are very close to the Raman-active A(1g) modes. The group theory analysis based on the tetragonal group (D-4h) is inadequate to explain our experimental observations. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Tu, JJ (reprint author), Brookhaven Natl Lab, Dept Phys, Bldg 510B,POB 5000, Upton, NY 11973 USA. NR 12 TC 2 Z9 2 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 324 EP 327 AR PII S0921-4526(02)00498-2 DI 10.1016/S0921-4526(02)00498-2 PG 4 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400078 ER PT J AU Geller, MR Dennis, WM Markel, VA Patton, KR Simon, DT Yang, HS AF Geller, MR Dennis, WM Markel, VA Patton, KR Simon, DT Yang, HS TI Theory of electron-phonon dynamics in insulating nanoparticles SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE nanoparticles; phonons; electron-phonon interaction ID NANOCRYSTALS; RELAXATION AB We discuss the rich vibrational dynamics of nanometer-scale semiconducting and insulating crystals as probed by localized electronic impurity states, with an emphasis on nanoparticles that are only weakly coupled to their environment. Two principal regimes of electron-phonon dynamics are distinguished, and a brief survey of vibrational-mode broadening mechanisms is presented. Recent work on the effects of mechanical interaction with the environment is discussed. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA. Washington Univ, Dept Elect Engn, St Louis, MO 63130 USA. Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Geller, MR (reprint author), Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA. RI Simon, Daniel/H-3027-2011; Markel, Vadim/A-1029-2007 OI Simon, Daniel/0000-0002-2799-3490; Markel, Vadim/0000-0002-9748-6865 NR 12 TC 11 Z9 11 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 430 EP 433 AR PII S0921-5626(02)00535-5 DI 10.1016/S0921-4526(02)00535-5 PG 4 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400108 ER PT J AU Li, JC Kolesnikov, AI AF Li, JC Kolesnikov, AI TI The first observation of the boson peak from water vapour deposited amorphous ice SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter, Phonons 2001 CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NH HO DARTMOUTH COLL DE amorphous ice; boson peak; neutron spectroscopy ID NEUTRON-SCATTERING AB We report the observation of the boson peak around 5 meV in the inelastic neutron scattering spectrum of a low-density amorphous ice obtained by vapour deposition on a cooled substrate (at 20 K) with low flow rate (similar to14 mg/h). The integrated intensity of the acoustical peak in the spectrum of the deposited amorphous ice (1-15 meV) is noticeably larger compared to that for crystalline ice-Ih (by about 5%). There was no excess scattering in the spectra of other low-density amorphous ices studied before, which were obtained either by annealing the high-density amorphous ice or by hyper-quenching of water droplets of mum size. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, IPNS, Argonne, IL 60439 USA. Univ Manchester, Dept Phys, Manchester M60 1QD, Lancs, England. RP Argonne Natl Lab, IPNS, Bldg 360,9700 S Cass Ave, Argonne, IL 60439 USA. EM akolesnikov@anl.gov RI Kolesnikov, Alexander/I-9015-2012 OI Kolesnikov, Alexander/0000-0003-1940-4649 NR 11 TC 4 Z9 4 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 EI 1873-2135 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 493 EP 496 AR PII S0921-4526(02)00552-5 DI 10.1016/S0921-4526(02)00552-5 PG 4 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400125 ER PT J AU Tu, JJ Sievers, A AF Tu, JJ Sievers, A TI Low-frequency Raman study of glass-like properties of mixed crystals with the fluorite structure SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE Raman scattering; glasses; two-level systems and fluorite mixed crystals ID LOW-ENERGY EXCITATIONS; 2-LEVEL SYSTEMS; SCATTERING; DENSITY AB The low-frequency, low-temperature Raman spectra of fluorite crystals doped with large amounts of LaF3 show a broad distribution of two-level systems (TLS) displaying A(1g) symmetry. We find that the intensity due to TLS in these glassy mixed crystals does not scale with the Boson peak scattering intensity. Instead, the results are consistent with a model where the TLS number density is controlled by the law of mass action with the 'effective' temperature determined by the frozen in lattice disorder. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA. RP Tu, JJ (reprint author), Brookhaven Natl Lab, Dept Phys, Bldg 510B,POB 5000, Upton, NY 11973 USA. NR 12 TC 0 Z9 0 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 517 EP 520 AR PII S0921-4526(02)00559-8 DI 10.1016/S0921-4526(02)00559-8 PG 4 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400132 ER PT J AU Morita, K Itoh, KM Nakajima, M Harima, H Mizoguchi, K Shiraki, Y Haller, EE AF Morita, K Itoh, KM Nakajima, M Harima, H Mizoguchi, K Shiraki, Y Haller, EE TI Raman spectra of Ge-70/Ge-76 isotope heterostructures with argon 488 and 514.5 nm excitations SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE Ge-70/Ge-76 isotope superlattices; Raman scattering; electronic resonance ID SUPERLATTICES; PHONONS AB Raman spectra of Ge-70/Ge-76 isotope bi-layer structures recorded with 488 and 514.5 nm Ar+ laser excitations are reported. The relative amplitudes of the Ge-70 and Ge-76 confined optical phonon peaks differ significantly for the two excitations at T = 10 K, while it is almost the same for the spectra recorded at 300 K. Possible interpretations of our results are provided considering the laser penetration depths and the isotope effect on the electronic resonance Raman frequency. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Keio Univ, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan. JST, PRESTO, Yokohama, Kanagawa 2238522, Japan. Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan. Osaka City Univ, Dept Appl Phys, Osaka 5588585, Japan. Univ Tokyo, RCAST, Tokyo 1538904, Japan. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Morita, K (reprint author), Keio Univ, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan. RI Nakajima, Makoto/A-1333-2016; Itoh, Kohei/C-5738-2014 OI Nakajima, Makoto/0000-0002-0351-2197; NR 10 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 561 EP 564 AR PII S0921-4526(02)00573-2 DI 10.1016/S0921-4526(02)00573-2 PG 4 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400145 ER PT J AU Hosokawa, S Kawakita, Y Pilgrim, WC Sinn, H AF Hosokawa, S Kawakita, Y Pilgrim, WC Sinn, H TI Studies of collective dynamics in liquid Ge over a wide temperature range using inelastic X-ray scattering technique SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 10th International Conference on Phonon Scattering in Condensed Matter CY AUG 12-17, 2001 CL DARTMOUTH COLL, HANOVER, NEW HAMPSHIRE HO DARTMOUTH COLL DE liquids; inelastic X-ray scattering; phonon dispersion ID INITIO MOLECULAR-DYNAMICS; GERMANIUM; MODES AB Our results for the dynamic structure factors S(Q, omega) of liquid Ge at 980degreesC and 1500degreesC obtained from inelastic X-ray scattering experiments, show distinct excitations resulting from propagating modes. The phonon dispersion matches the hydrodynamic sound velocity in the low Q range, i.e., no positive dispersion can be detected, which is consistent with generalized hydrodynamic theory. The similarity of our experimental results in S(Q, omega)s between 980degreesC and 1500degreesC and the absence of additional peaks besides the acoustic mode indicate no hint for internal vibrations in stable covalent clusters. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Marburg, Inst Phys Kern & Makromol Chem, D-35032 Marburg, Germany. Kyushu Univ, Fac Sci, Dept Phys, Fukuoka 8108560, Japan. Argonne Natl Lab, Adv Photon Source, SRI, CAT, Argonne, IL 60439 USA. RP Hosokawa, S (reprint author), Univ Marburg, Inst Phys Kern & Makromol Chem, D-35032 Marburg, Germany. NR 10 TC 11 Z9 11 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD MAY PY 2002 VL 316 BP 610 EP 612 AR PII S0921-4526(02)00587-2 DI 10.1016/S0921-4526(02)00587-2 PG 3 WC Physics, Condensed Matter SC Physics GA 564CL UT WOS:000176297400159 ER PT J AU Thompson, JR Goyal, A Christen, DK Kroeger, DM AF Thompson, JR Goyal, A Christen, DK Kroeger, DM TI Ni-Cr textured substrates with reduced ferromagnetism for coated conductor applications SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article DE NiCr alloys; magnetization; hysteretic loss; coated conductor applications ID ANGULAR-DEPENDENCE; MAGNETIC-FIELDS; CURRENT LOSSES; THICK-FILMS; TAPES; DEPOSITION AB A series of biaxially text U red Ni1-xCrx materials, with compositions x = 0, 7, 9, 11, and 13 at. %Cr, have been studied for use as substrate materials in coated conductor applications with high temperature superconductors. The magnetic properties were investigated, including the hysteretic loss in a Ni-7at.%Cr sample that Alas controllably deformed; for comparison. the loss was also measured in a similarly deformed pure Ni substrate. Complementary X-ray diffraction studies show that thermomechanical processing produces nearly complete {100}<100> cube texturing, as desired for applications. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. RP Thompson, JR (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. NR 24 TC 40 Z9 43 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD MAY 1 PY 2002 VL 370 IS 3 BP 169 EP 176 AR PII S0921-4534(01)00937-6 DI 10.1016/S0921-4534(01)00937-6 PG 8 WC Physics, Applied SC Physics GA 547KQ UT WOS:000175331900005 ER PT J AU Kaper, HG Kaper, TJ AF Kaper, HG Kaper, TJ TI Asymptotic analysis of two reduction methods for systems of chemical reactions SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article DE chemical kinetics; combustion; atmospheric chemistry; enzyme kinetics; biophysics; reduction methods; slow manifolds; intrinsic low-dimensional manifolds; geometric singular perturbation theory; multiple time scales; asymptotic analysis; Michaelis-Menten-Henri mechanism ID STEADY-STATE APPROXIMATION; LOW-DIMENSIONAL MANIFOLDS; ORDINARY DIFFERENTIAL-EQUATIONS; PRINCIPAL COMPONENT ANALYSIS; COMPLEX KINETIC SYSTEMS; INVARIANT-MANIFOLDS; REACTION-MECHANISMS; GEOMETRICAL PICTURE; REACTION NETWORKS; ENZYME-KINETICS AB This paper concerns two methods for reducing large systems of chemical kinetics equations, namely, the method of intrinsic low-dimensional manifolds (ILDMs) due to Maas and Pope [Combust. Flame 88 (1992) 239] and an iterative method due to Fraser [J. Chem. Phys. 88 (1988) 4732] and further developed by Roussel and Fraser [J. Chem. Phys. 93 (1990) 1072]. Both methods exploit the separation of fast and slow reaction time scales to find low-dimensional manifolds in the space of species concentrations where the long-term dynamics are played out. The asymptotic expansions of these manifolds (,epsilon down arrow 0, where E measures the ratio of the reaction time scales) are compared with the asymptotic expansion of M-epsilon,, the slow manifold given by geometric singular perturbation theory. It is shown that the expansions of the ILDM and M-epsilon agree up to and including terms of O(epsilon); the former has an error at O(epsilon(2)) that is proportional to the local curvature of M-0. The error vanishes if and only if the curvature is zero everywhere. The iterative method generates, term by term, the asymptotic expansion of Mepsilon,. Starting from M-0, the ith application of the algorithm yields the correct expansion coefficient at O(epsilon'), while leaving the lower-order coefficients invariant. Thus, after e applications, the expansion is accurate up to and including the terms of O(epsilon(l)). The analytical results are illustrated on a planar system from enzyme kinetics (Michaelis-Menten-Henri) and a model planar system due to Davis and Skodje. (C) 2002 Published by Elsevier Science B.V. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Boston Univ, Dept Math, Boston, MA 02215 USA. Boston Univ, Ctr Biodynam, Boston, MA 02215 USA. RP Kaper, HG (reprint author), Natl Sci Fdn, Div Math Sci, 4201 Wilson Blvd,Suite 1025, Arlington, VA 22230 USA. NR 91 TC 85 Z9 87 U1 0 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD MAY 1 PY 2002 VL 165 IS 1-2 BP 66 EP 93 AR PII S0167-2789(02)00386-X DI 10.1016/S0167-2789(02)00386-X PG 28 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA 560QZ UT WOS:000176093900005 ER PT J AU Kislovskii, EN Olikhovskii, SI Molodkin, VB Nemoshkalenko, VV Krivitsky, VP Len, EG Pervak, EV Ice, GE Larson, BC AF Kislovskii, EN Olikhovskii, SI Molodkin, VB Nemoshkalenko, VV Krivitsky, VP Len, EG Pervak, EV Ice, GE Larson, BC TI Bragg diffraction of X-rays by single crystals with large microdefects II. High-resolution diffraction measurements SO PHYSICA STATUS SOLIDI B-BASIC RESEARCH LA English DT Article ID CZOCHRALSKI-GROWN SILICON; ELASTICALLY BENT CRYSTALS; DISLOCATION-FREE SILICON; DIFFUSE-SCATTERING; OXYGEN PRECIPITATION; DYNAMICAL THEORY; POINT-DEFECTS; GAAS; CLUSTERS; COPPER AB The generalized dynamical theory of X-ray scattering by single crystals containing randomly distributed microdefects has been applied to characterize structural imperfections in the Czochralski-grown dislocation-free silicon sample annealed at 1080 degreesC during 6 h. Measurements of rocking curves for 111 and 333 reflections of CuKalpha1 radiation have been performed by the high-resolution double-crystal diffractometer. The sizes and concentrations of oxygen precipitates and dislocation loops, which have been determined by independent fitting of the two rocking curves, are in good agreement confirming the validity of the developed theory. C1 Natl Acad Sci Ukraine, Inst Met Phys, UA-03680 Kiev, Ukraine. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Kislovskii, EN (reprint author), Natl Acad Sci Ukraine, Inst Met Phys, Vernadsky Blvd 36, UA-03680 Kiev, Ukraine. RI Len, Evgen/N-3032-2015 OI Len, Evgen/0000-0002-1554-2342 NR 45 TC 11 Z9 11 U1 0 U2 2 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0370-1972 J9 PHYS STATUS SOLIDI B JI Phys. Status Solidi B-Basic Res. PD MAY PY 2002 VL 231 IS 1 BP 213 EP 221 DI 10.1002/1521-3951(200205)231:1<213::AID-PSSB213>3.0.CO;2-C PG 9 WC Physics, Condensed Matter SC Physics GA 561EJ UT WOS:000176126500026 ER PT J AU Errandonea, D Somayazulu, M Hausermann, D AF Errandonea, D Somayazulu, M Hausermann, D TI CaWO4: A new high-pressure and high-temperature phase SO PHYSICA STATUS SOLIDI B-BASIC RESEARCH LA English DT Article ID X-RAY-DIFFRACTION; TRANSITIONS C1 Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA. RP Errandonea, D (reprint author), Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Bldg 434E,9700 S Cass Ave, Argonne, IL 60439 USA. RI Errandonea, Daniel/J-7695-2016 OI Errandonea, Daniel/0000-0003-0189-4221 NR 10 TC 30 Z9 30 U1 2 U2 9 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0370-1972 J9 PHYS STATUS SOLIDI B JI Phys. Status Solidi B-Basic Res. PD MAY PY 2002 VL 231 IS 1 BP R1 EP R3 DI 10.1002/1521-3951(200205)231:13.0.CO;2-7 PG 3 WC Physics, Condensed Matter SC Physics GA 561EJ UT WOS:000176126500002 ER PT J AU Budker, D Kimball, DF Yashchuk, VV Zolotorev, M AF Budker, D Kimball, DF Yashchuk, VV Zolotorev, M TI Nonlinear magneto-optical rotation with frequency-modulated light SO PHYSICAL REVIEW A LA English DT Article ID LASER AB A magnetometric technique is demonstrated that may be suitable for precision measurements of fields ranging from the submicrogauss level to above the earth field. It is based on resonant nonlinear magneto-optical rotation caused by atoms contained in a vapor cell with antirelaxation wall coating. Linearly polarized, frequency-modulated laser light is used for optical pumping and probing. If the time-dependent optical rotation is measured at the first harmonic of the modulation frequency, ultra-narrow (similar to a few hertz) resonances are observed at near-zero magnetic fields, and at fields where the Larmor frequency coincides with half the light modulation frequency. Upon optimization, the sensitivity of the technique is expected to exceed 10(-11) G/rootHz. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA. RP Budker, D (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 12 TC 75 Z9 76 U1 5 U2 13 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 MAY PY 2002 VL 65 IS 5 AR 055403 DI 10.1103/PhysRevA.65.055403 PN B PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PH UT WOS:000175744300080 ER PT J AU Cohen, JS AF Cohen, JS TI Capture of negative muons and antiprotons by noble-gas atoms SO PHYSICAL REVIEW A LA English DT Article ID EFFECTIVE HAMILTONIAN-STRUCTURE; FERMION MOLECULAR-DYNAMICS; COULOMB-CAPTURE; HYDROGEN; NEON; PROBABILITIES; MIXTURES; NITROGEN; RATIOS; ARGON AB Cross sections for capture of negative muons (mu(-)) and antiprotons ((p) over bar) by helium, neon, argon, krypton, and xenon atoms are calculated using the fermion molecular dynamics method. These cross sections are used to estimate the capture ratios in mixtures. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM cohen@lanl.gov NR 36 TC 18 Z9 18 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9926 EI 2469-9934 J9 PHYS REV A JI Phys. Rev. A PD MAY PY 2002 VL 65 IS 5 AR 052714 DI 10.1103/PhysRevA.65.052714 PN A PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PC UT WOS:000175743800095 ER PT J AU Dalvit, DAR Dziarmaga, J Onofrio, R AF Dalvit, DAR Dziarmaga, J Onofrio, R TI Continuous quantum measurement of a Bose-Einstein condensate: A stochastic Gross-Pitaevskii equation SO PHYSICAL REVIEW A LA English DT Article ID NONDEMOLITION MEASUREMENTS; DISSIPATIVE DYNAMICS; RELATIVE PHASE; DARK SOLITONS; LOCALIZATION; TRANSITION; SUPERFLUID; ATOMS; COLD; GAS AB We analyze the dynamics of a Bose-Einstein condensate undergoing a continuous dispersive imaging by using a Lindblad operator formalism. Continuous strong measurements drive the condensate out of the coherent-state description assumed within the Gross-Pitaevskii mean-field approach. Continuous weak measurements allow us instead to replace, for time scales short enough, the exact problem with its mean-field approximation through a stochastic analog of the Gross-Pitaevskii equation. The latter is used to show the unwinding of a dark soliton undergoing a continuous imaging. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland. Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy. INFM, Unita Roma 1, I-00185 Rome, Italy. Ctr Stat Mech & Complex, I-00185 Rome, Italy. RP Dalvit, DAR (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 60 TC 26 Z9 26 U1 1 U2 7 PU AMER 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 MAY PY 2002 VL 65 IS 5 AR 053604 DI 10.1103/PhysRevA.65.053604 PN B PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PH UT WOS:000175744300030 ER PT J AU Djuric, N Bannister, ME Derkatch, AM Griffin, DC Krause, HF Popovic, DB Smith, ACH Wallbank, B Dunn, GH AF Djuric, N Bannister, ME Derkatch, AM Griffin, DC Krause, HF Popovic, DB Smith, ACH Wallbank, B Dunn, GH TI Absolute cross sections for near-threshold electron-impact excitation of the dipole-allowed transitions 3s(2) (1)S -> 3s3p (1)P in Cl(5+) and 3s (2)S -> 3p (2)P in Cl(6+) SO PHYSICAL REVIEW A LA English DT Article ID ENERGY-LOSS TECHNIQUE; ION EXCITATION; IONIZATION; BEAMS AB Experimental and theoretical cross sections for electron-impact excitation of the dipole-allowed transitions 3s(2) (1)S-->3s3p (1)P in Cl(5+) and 3s (2)S-->3p (2)P in Cl(6+) near the excitation thresholds are reported. Absolute cross sections are measured using the merged electron-ion beams energy-loss technique. The intermediate-coupling frame-transformation R-matrix method is used to obtain theoretical cross sections. The total cross sections, for the transitions studied in both ions, exhibit resonance structures near threshold. There is excellent agreement between theory and experiment with respect to both the shape and the magnitude of the cross section for the 3s (2)S-->3p (2)P transition in Cl(6+). For Cl(5+), structures and trends in both the present R-matrix calculation and the previous calculation of Baluja and Mohan [J. Phys. B 20, 831 (1987)] agree well with the experimental results. However, the magnitudes of the theoretical cross sections for Cl(5+) are significantly smaller than the measured cross section, which has been corrected for metastable contamination. C1 Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. Natl Inst Stand & Technol, Boulder, CO 80309 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Stockholm, Dept Phys, S-11385 Stockholm, Sweden. Rollins Coll, Dept Phys, Winter Pk, FL 32789 USA. UCL, Dept Phys & Astron, London WC1E 6BT, England. St Francis Xavier Univ, Antigonish, NS B2G 2W5, Canada. RP Djuric, N (reprint author), Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. NR 24 TC 10 Z9 10 U1 0 U2 1 PU AMER 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 MAY PY 2002 VL 65 IS 5 AR 052711 DI 10.1103/PhysRevA.65.052711 PN A PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PC UT WOS:000175743800092 ER PT J AU Hoffman, DK Kouri, DJ AF Hoffman, DK Kouri, DJ TI Hierarchy of local minimum solutions of Heisenberg's uncertainty principle SO PHYSICAL REVIEW A LA English DT Article ID MECHANICAL PATH-INTEGRALS; POLYNOMIAL HAMILTONIANS; EXTENSIONS; PROPAGATOR AB Local minimum solutions to Heisenberg's uncertainty principle are studied in detail. Of particular concern is obtaining an optimal procedure to squeeze the uncertainty in one canonical operator while introducing, in a well-defined mathematical sense, the least possible increase in the uncertainty of the relevant conjugate operator. The result is a hierarchy of "minimum uncertainty (mu-) wavelets," which are intimately associated with the "Hermite distributed approximating functionals" [D. K. Hoffman and D. J. Kouri, Phys. Rev. Lett. 85, 5263 (2000)]. The mu wavelets can be used with any quantum state to squeeze the uncertainty of a particular observable. Several specific examples are given and some possible applications are discussed. C1 Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Univ Houston, Dept Chem, Houston, TX 77204 USA. Univ Houston, Dept Phys, Houston, TX 77204 USA. RP Hoffman, DK (reprint author), Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. NR 38 TC 4 Z9 4 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 MAY PY 2002 VL 65 IS 5 AR 052106 DI 10.1103/PhysRevA.65.052106 PN A PG 13 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PC UT WOS:000175743800022 ER PT J AU Schultz, DR Reinhold, CO Krstic, PS Strayer, MR AF Schultz, DR Reinhold, CO Krstic, PS Strayer, MR TI Ejected-electron spectrum in low-energy proton-hydrogen collisions SO PHYSICAL REVIEW A LA English DT Article ID ION-ATOM COLLISIONS; DEPENDENT SCHRODINGER-EQUATION; SPLINE COLLOCATION METHOD; ANGULAR-DISTRIBUTIONS; CHARGE-TRANSFER; CONTINUUM ELECTRONS; MOLECULAR-HYDROGEN; VELOCITY; IMPACT; SLOW AB The behavior of the ejected electron spectra resulting from low-energy ion-atom collisions relevant to momentum imaging experiments is explored and the origin of the oscillatory structures these spectra display as a function of collision energy is discussed. This is aided by consideration of the time-dependent, electronic Schodinger equation that is solved at a fixed impact parameter for 1-25 keV proton impact of atomic hydrogen utilizing the lattice, Fourier collocation technique and split-operator time propagation. At a large internuclear separation after the collision the bound states of the target and projectile are projected out for n<4 and the resulting continuum wave function is examined. Techniques, such as multigridding, are investigated to extend the propagation of the wave function to significantly larger final distances. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Schultz, DR (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 25 TC 26 Z9 26 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 MAY PY 2002 VL 65 IS 5 AR 052722 DI 10.1103/PhysRevA.65.052722 PN A PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PC UT WOS:000175743800103 ER PT J AU Stambulchik, E Maron, Y Bailey, JE Cuneo, ME AF Stambulchik, E Maron, Y Bailey, JE Cuneo, ME TI Polarization properties of ion-excitation mechanisms in high-voltage gaps SO PHYSICAL REVIEW A LA English DT Article ID RAY-LINE POLARIZATION; ELECTRIC-FIELD; SPECTROSCOPY; DIODE; ATOMS; BEAM; TW AB We investigate the excitation of atomic levels in a high-voltage discharge gap by studying the spectrum of the 2p-3d transitions of Li I atoms flowing in the gap. The Stark splitting of this transition, due to the gap electric field, enables resolving the lines originating from different magnetic sublevels of the 3d level. We show that the atomic level populations are dominated by excitations due to ions accelerated in the gap. The directionality of the ion beam induces magnetic sublevel populations that are remarkably different from the statistical distribution, where the major role is played by the relatively low-energy ions accelerated near the ion-emitting surface. By accounting for the polarization properties of the beam-induced level excitations we were able to obtain good agreement with observed populations of atomic levels with different m(l) values. C1 Weizmann Inst Sci, Fac Phys, IL-76100 Rehovot, Israel. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Stambulchik, E (reprint author), Weizmann Inst Sci, Fac Phys, IL-76100 Rehovot, Israel. NR 32 TC 0 Z9 0 U1 0 U2 0 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 MAY PY 2002 VL 65 IS 5 AR 052726 DI 10.1103/PhysRevA.65.052726 PN A PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 554PC UT WOS:000175743800107 ER PT J AU Abanov, AG Abanov, A AF Abanov, AG Abanov, A TI Berry phase for a ferromagnet with fractional spin SO PHYSICAL REVIEW B LA English DT Article AB We study the double exchange model on two lattice sites with one conduction electron in the limit of an infinite Hund's interaction. While this simple problem is exactly solvable, we present an approximate solution which is valid in the limit of large core spins. This solution is obtained by integrating out charge degrees of freedom. The effective action of two core spins obtained in the result of such an integration resembles the action of two fractional spins. We show that the action obtained via naive gradient expansion is inconsistent. However, a "nonperturbative" treatment leads to an extra term in the effective action which fixes this inconsistency. This Berry phase term is geometric in nature arises from a geometric constraint on a target space imposed by adiabatic approximation. C1 SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Abanov, AG (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. NR 10 TC 0 Z9 0 U1 2 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 MAY 1 PY 2002 VL 65 IS 18 AR 184407 DI 10.1103/PhysRevB.65.184407 PG 11 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700059 ER PT J AU Alvarez, JV Valenti, R Zheludev, A AF Alvarez, JV Valenti, R Zheludev, A TI Microscopic model for a class of mixed-spin quantum antiferromagnets SO PHYSICAL REVIEW B LA English DT Article ID ONE-DIMENSIONAL ANTIFERROMAGNETS; HALDANE-GAP EXCITATIONS; MAGNETIC-STRUCTURE; CHAIN; DYNAMICS; Y2BANIO5; FIELD; ND2BANIO5; S=1/2; KCUF3 AB We propose a microscopic model that describes the magnetic behavior of the mixed-spin quantum systems R2BaNiO5 (R=magnetic rare earth). An evaluation of the properties of this model by quantum Monte Carlo simulations shows remarkable good agreement with the experimental data, and provides insight into the physics of mixed-spin quantum magnets. C1 Univ Saarland, Fak 7, D-66041 Saarbrucken, Germany. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Univ Saarland, Fak 7, D-66041 Saarbrucken, Germany. RI Alvarez, Jose/H-4696-2015 OI Alvarez, Jose/0000-0001-5178-4309 NR 29 TC 7 Z9 7 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 18 AR 184417 DI 10.1103/PhysRevB.65.184417 PG 5 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700069 ER PT J AU Batista, CD Ortiz, G Gubernatis, JE AF Batista, CD Ortiz, G Gubernatis, JE TI Unveiling order behind complexity: Coexistence of ferromagnetism and Bose-Einstein condensation SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM-SPIN CHAINS; SUPERCONDUCTIVITY; MODEL; GAS AB We present an algebraic framework for identifying the order parameter and the possible phases of quantum systems, which is based on identifying the local dimension N of the quantum operators and using the SU(N) group representing the generators of generalized spin-particle mappings. We illustrate this for N=3 by presenting for any spatial dimension the exact solution of the bilinear-biquadratic S=1 quantum Heisenberg model at a high symmetry point. Through this solution we rigorously show that itinerant ferromagnetism and Bose-Einstein condensation may coexist. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Batista, CD (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI Batista, Cristian/J-8008-2016 NR 18 TC 30 Z9 31 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 MAY 1 PY 2002 VL 65 IS 18 AR 180402 DI 10.1103/PhysRevB.65.180402 PG 4 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700009 ER PT J AU Blake, GR Palstra, TTM Ren, Y Nugroho, AA Menovsky, AA AF Blake, GR Palstra, TTM Ren, Y Nugroho, AA Menovsky, AA TI Neutron diffraction, x-ray diffraction, and specific heat studies of orbital ordering in YVO3 SO PHYSICAL REVIEW B LA English DT Article ID JAHN-TELLER DISTORTION; MOTT-INSULATOR YVO3; MAGNETIC-PROPERTIES; LAMNO3; TRANSITION; SCATTERING; CRYSTAL; LATIO3; YTIO3; PEROVSKITES AB Neutron diffraction, synchrotron x-ray diffraction, and specific heat studies have been carried out to investigate the nature of the ordered occupation of the vanadium d orbitals in perovskite YVO3. Evidence has been found for a change in the type of orbital ordering at the 77-K phase transition in this material, manifested by a change in the type of Jahn-Teller distortion. This transition between orbital orderings is caused by an increase in octahedral tilting with decreasing temperature. The orbital ordering above 77 K is not destroyed at the magnetic ordering temperature of 116 K, but is present as far as a second structural phase transition at 200 K. The entropy changes at the onset of both spin and orbital ordering are much lower than the smallest semiclassical value of Rln2 J/(mole K). C1 Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Amsterdam, Van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands. RP Palstra, TTM (reprint author), Univ Groningen, Ctr Mat Sci, Solid State Chem Lab, Nijenborgh 4, NL-9747 AG Groningen, Netherlands. RI Nugroho, Agustinus Agung/E-5977-2010; Palstra, Thomas/K-1961-2013 OI Nugroho, Agustinus Agung/0000-0002-1785-4008; Palstra, Thomas/0000-0001-5239-3115 NR 32 TC 80 Z9 80 U1 3 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 MAY 1 PY 2002 VL 65 IS 17 AR 174112 DI 10.1103/PhysRevB.65.174112 PG 9 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600051 ER PT J AU Boukhvalov, DW Lichtenstein, AI Dobrovitski, VV Katsnelson, MI Harmon, BN Mazurenko, VV Anisimov, VI AF Boukhvalov, DW Lichtenstein, AI Dobrovitski, VV Katsnelson, MI Harmon, BN Mazurenko, VV Anisimov, VI TI Effect of local Coulomb interactions on the electronic structure and exchange interactions in Mn-12 magnetic molecules SO PHYSICAL REVIEW B LA English DT Article ID HIGH-SPIN MOLECULES; CORRELATED SYSTEMS; 1ST-PRINCIPLES CALCULATIONS; RELAXATION; TRANSITION; NANOMAGNETS; NEUTRON; MN-12-ACETATE; EXCITATIONS; CLUSTERS AB We have studied the effect of local Coulomb interactions on the electronic structure of the molecular magnet Mn-12 acetate within the LDA+U approach. The account of the onsite repulsion results in a finite energy gap that is in a good agreement with the experimental results. The resulting magnetic moments and charge states of nonequivalent manganese ions agree very well with experiments. The calculated values of the intramolecular exchange parameters depend on the molecule's spin configuration, differing by 25-30% between the ferrimagnetic ground state and the completely ferromagnetic configurations. The values of the ground-state exchange coupling parameters are in reasonable agreement with the recent data on the magnetization jumps in megagauss magnetic fields. Simple estimates show that the obtained exchange parameters can be applied, at least qualitatively, to the description of the spin excitations in Mn-12 acetate. C1 Forschungszentrum Julich, D-52425 Julich, Germany. Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia. Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Forschungszentrum Julich, Postfach 1913, D-52425 Julich, Germany. RI Mazurenko, Vladimir/E-7694-2011; Katsnelson, Mikhail/D-4359-2012; Anisimov, Vladimir/K-1235-2013; Lichtenstein, Alexander/K-8730-2012 OI Anisimov, Vladimir/0000-0002-1087-1956; Lichtenstein, Alexander/0000-0003-0152-7122 NR 49 TC 50 Z9 50 U1 1 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 18 AR 184435 DI 10.1103/PhysRevB.65.184435 PG 6 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700087 ER PT J AU Callens, R Coussement, R L'abbe, C Nasu, S Vyvey, K Yamada, T Yoda, Y Odeurs, J AF Callens, R Coussement, R L'abbe, C Nasu, S Vyvey, K Yamada, T Yoda, Y Odeurs, J TI Stroboscopic detection of nuclear forward-scattered synchrotron radiation SO PHYSICAL REVIEW B LA English DT Article ID RESONANT SCATTERING; QUANTUM BEATS; HIGH-PRESSURE AB Stroboscopic detection of nuclear forward-scattered synchrotron radiation is proposed and applied. Stroboscopic measurements provide energy-resolved spectra and relax the condition on the bunch mode. This concept is applied to study the magnetism in CaFeO3 under high pressure. C1 Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium. Free Univ Brussels, B-1050 Brussels, Belgium. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Osaka Univ, Grad Sch Engn Sci, Osaka 5608531, Japan. Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan. RP Callens, R (reprint author), Katholieke Univ Leuven, Inst Kern & Stralingsfys, Celestijnenlaan 200D, B-3001 Louvain, Belgium. NR 17 TC 9 Z9 9 U1 1 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 MAY 1 PY 2002 VL 65 IS 18 AR 180404 DI 10.1103/PhysRevB.65.180404 PG 4 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700011 ER PT J AU Eggert, JH Weck, G Loubeyre, P Mezouar, M AF Eggert, JH Weck, G Loubeyre, P Mezouar, M TI Quantitative structure factor and density measurements of high-pressure fluids in diamond anvil cells by x-ray diffraction: Argon and water SO PHYSICAL REVIEW B LA English DT Article ID REVERSE MONTE-CARLO; HIGH-TEMPERATURES; LIQUID WATER; SCATTERING; ORDER; DETECTOR; RANGE; PHASE; KBAR AB We report quantitatively accurate high-pressure, structure-factor measurements of fluids in diamond anvil cells (DAC's) using x-ray diffraction. In the analysis of our diffraction data, we found it possible (and necessary) to determine the density directly. Thus, we also present a diffraction-based determination of the equation of state for fluid water. The analysis of these measurements is difficult since the diamond anvils are many times as thick as the sample and excessive care must be taken in the background subtraction. Due to the novel nature of the experiment and the complexity of the analysis, this paper is concerned primarily with a careful exposition of our analytical methods. Our analysis is applicable to both atomic and molecular fluids and glasses, and we present results for the structure factor and density of two relatively low-Z liquids: argon and water. In order to validate our methods we present an extensive comparison of our measurements on water at Psimilar or equal to0 in a DAC to recent state-of-the-art x-ray and neutron diffraction experiments and to first-principles simulations at ambient conditions. C1 CEA, DIF, DPTA, SPMC, F-92680 Bruyeres Le Chatel, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. European Synchrotron Radiat Facil, F-38043 Grenoble, France. RP Eggert, JH (reprint author), CEA, DIF, DPTA, SPMC, F-92680 Bruyeres Le Chatel, France. NR 31 TC 64 Z9 66 U1 3 U2 35 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 MAY 1 PY 2002 VL 65 IS 17 AR 174105 DI 10.1103/PhysRevB.65.174105 PG 12 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600044 ER PT J AU Grimsditch, M Vavassori, P Novosad, V Metlushko, V Shima, H Otani, Y Fukamichi, K AF Grimsditch, M Vavassori, P Novosad, V Metlushko, V Shima, H Otani, Y Fukamichi, K TI Vortex chirality in an array of ferromagnetic dots SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC VORTICES; ANNIHILATION; DIFFRACTION; NUCLEATION; NANODISKS AB Magnetization of an array of submicron permalloy dots was investigated using the diffracted magneto-optical Kerr effect. The shapes of the higher-order hysteresis loops are explained by the magnetic form factors associated with a vortex spin structure in each disk. The imaginary part of the form factor also explains the unexpected measured differences between hysteresis loops obtained on positive and negative diffraction orders. Shape effects account for the coherent chirality of the vortices over the array. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Ferrara, Dipartmento Fis, INFM, I-44100 Ferrara, Italy. Univ Illinois, Dept Elect Engn & Comp Sci, Chicago, IL 60607 USA. Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan. Japan Sci & Technol Corp, CREST, Kawaguchi 3320012, Japan. RP Grimsditch, M (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Novosad, Valentyn/C-2018-2014; OTANI, Yoshichika/I-5884-2012; Vavassori, Paolo/B-4299-2014; Novosad, V /J-4843-2015 OI OTANI, Yoshichika/0000-0001-8008-1493; Vavassori, Paolo/0000-0002-4735-6640; NR 18 TC 45 Z9 45 U1 0 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 MAY 1 PY 2002 VL 65 IS 17 AR 172419 DI 10.1103/PhysRevB.65.172419 PG 4 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600029 ER PT J AU Jimenez-Mier, J Diebold, U Ederer, DL Callcott, TA Grush, M Perera, RC AF Jimenez-Mier, J Diebold, U Ederer, DL Callcott, TA Grush, M Perera, RC TI Decay channels for the Ti(2p(1/2)) core hole excitations in TiO2 observed by x-ray Raman scattering SO PHYSICAL REVIEW B LA English DT Article ID RESONANT PHOTOEMISSION; ELECTRONIC-STRUCTURE; L-EDGE; RUTILE; ABSORPTION; SPECTRA; EMISSION; SPECTROSCOPY; DEPENDENCE; ANATASE AB We present high-resolution x-ray fluorescence spectra, corrected for self-absorption, following resonant excitation of a Ti(2p(1/2)) electron in TiO2. Several transitions are studied that show complex behavior as a function of photon excitation energy, indicative of interaction in the excitation and decay channels. Three peaks are identified as transitions resulting from the excitation of a 2p(1/2) electron, one of them corresponding to direct valence emission with a 3d spectator electron and the other two to participator emission following the Coster-Kronig decay of the 2p(1/2) hole. Additional emission features at higher photon energies correspond to valence emission in the presence of a charge-transfer excitation that has been found in the 2p x-ray photoelectron spectroscopy spectrum, and also in the x-ray absorption spectrum. A detailed analysis of the energy dispersion versus excitation energy provides information about the dynamical processes involved. The results are interpreted in terms of the calculated band structure of the compound. C1 Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. Tulane Univ, Dept Phys, New Orleans, LA 70118 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Jimenez-Mier, J (reprint author), Natl Autonomous Univ Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico. RI Jimenez-Mier, Jose/A-5081-2009; Diebold, Ulrike/A-3681-2010 OI Jimenez-Mier, Jose/0000-0002-5939-9568; Diebold, Ulrike/0000-0003-0319-5256 NR 30 TC 10 Z9 10 U1 1 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 MAY 1 PY 2002 VL 65 IS 18 AR 184105 DI 10.1103/PhysRevB.65.184105 PG 8 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700038 ER PT J AU Kim, C Ronning, F Damascelli, A Feng, DL Shen, ZX Wells, BO Kim, YJ Birgeneau, RJ Kastner, MA Miller, LL Eisaki, H Uchida, S AF Kim, C Ronning, F Damascelli, A Feng, DL Shen, ZX Wells, BO Kim, YJ Birgeneau, RJ Kastner, MA Miller, LL Eisaki, H Uchida, S TI Anomalous temperature dependence in the photoemission spectral function of cuprates SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; SUPERCONDUCTORS; SR2CUO2CL2; MODEL; BI2SR2CACU2O8+DELTA; CONDUCTIVITY; LA2-XSRXCUO4; INSULATORS; CA2CUO2CL2; EVOLUTION AB Temperature-dependent angle-resolved photoemission experiments were performed on overdoped single layer Bi2Sr2CuO6 (T(c)similar to4 K) and on the parent compounds Sr2CuO2Cl2 and Ca2CuO2Cl2. Contrary to the more conventional results obtained on Bi2Sr2CuO6, the parent compounds show strong temperature dependence over a wide energy range that is two orders of magnitude larger than the temperature scale involved. The doping dependence strongly suggests that the anomalous temperature dependence has its origin in the novel many-body physics in the Mott insulators. We consider the observed temperature dependence using a heuristic model with multiple initial and final states in the photoemission process. The nature of the multiple states and broad photoemission line shape in parent compounds is also given. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. MIT, Dept Phys, Cambridge, MA 02139 USA. Iowa State Univ, Dept Phys, Ames, IA 50011 USA. Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 133, Japan. RP Kim, C (reprint author), Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea. RI Kim, Young-June /G-7196-2011; damascelli, andrea/P-6329-2014 OI Kim, Young-June /0000-0002-1172-8895; damascelli, andrea/0000-0001-9895-2226 NR 41 TC 26 Z9 26 U1 0 U2 3 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 MAY 1 PY 2002 VL 65 IS 17 AR 174516 DI 10.1103/PhysRevB.65.174516 PG 7 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600115 ER PT J AU Kolton, AB Dominguez, D Gronbech-Jensen, N AF Kolton, AB Dominguez, D Gronbech-Jensen, N TI Mode locking in driven vortex lattices with transverse ac drive and random pinning SO PHYSICAL REVIEW B LA English DT Article ID CHARGE-DENSITY WAVES; JOSEPHSON-JUNCTION ARRAYS; GIANT SHAPIRO STEPS; PERIODIC MEDIA; LOGARITHMIC INTERACTIONS; LAYERED SUPERCONDUCTORS; II SUPERCONDUCTORS; PHASE-LOCKING; DYNAMICS; MOTION AB We find mode-locking steps in simulated current-voltage characteristics of driven vortex lattices with random pinning when an applied ac current is perpendicular to the dc current. For low frequencies there is mode locking only above a nonzero threshold ac force amplitude, while for large frequencies there is mode locking for any small ac force. This is consistent with the nature of transverse temporal order in the different regimes in the absence of an applied ac drive. For large frequencies the magnitude of the fundamental mode-locked step depends linearly on the ac force amplitude. C1 Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, NERSC, Berkeley, CA 94720 USA. RP Kolton, AB (reprint author), Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. OI Kolton, Alejandro B./0000-0002-9050-5859 NR 52 TC 10 Z9 10 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 MAY 1 PY 2002 VL 65 IS 18 AR 184508 DI 10.1103/PhysRevB.65.184508 PG 5 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700097 ER PT J AU Ku, LC Trugman, SA Bonca, J AF Ku, LC Trugman, SA Bonca, J TI Dimensionality effects on the Holstein polaron SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-PHONON SYSTEMS; ENERGY-BAND THEORY; LATTICE POLARON; DYNAMICAL PROPERTIES; INFINITE DIMENSIONS; PHASE-TRANSITIONS; GROUND-STATE; MONTE-CARLO; MODEL; BIPOLARONS AB Based on a recently developed variational method, we explore the properties of the Holstein polaron on an infinite lattice in D dimensions, where 1less than or equal toDless than or equal to4. The computational method converges as a power law, so that highly accurate results can be achieved with modest resources. We present the most accurate ground state energy (with no small parameter) to date for polaron problems, 21 digits for the one-dimensional (1D) polaron at intermediate coupling. The dimensionality effects on polaron band dispersion, effective mass, and electron-phonon (el-ph) correlation functions are investigated in all coupling regimes. It is found that the crossover to large effective mass of the higher-dimensional polaron is much sharper than the 1D polaron. The correlation length between the electron and phonons decreases significantly as the dimension increases. Our results compare favorably with those of the quantum Monte Carlo, dynamical mean-field theory, density-matrix renormalization-group, and Toyozawa variational methods. We demonstrate that the Toyozawa wave function is qualitatively correct for the ground-state energy and the two-point electron-phonon correlation functions, but fails for the three-point functions. Based on this finding, we propose an improved Toyozawa variational wave function. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90024 USA. Univ Ljubljana, FMF, Ljubljana 1000, Slovenia. Jozef Stefan Inst, Ljubljana 1000, Slovenia. RP Ku, LC (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 41 TC 78 Z9 79 U1 1 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 MAY 1 PY 2002 VL 65 IS 17 AR 174306 DI 10.1103/PhysRevB.65.174306 PG 10 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600069 ER PT J AU Lorenz, B Xue, YY Meng, RL Chu, CW AF Lorenz, B Xue, YY Meng, RL Chu, CW TI Field dependence of the intragrain superconductive transition in RuSr2EuCu2O8 SO PHYSICAL REVIEW B LA English DT Article ID JOSEPHSON-JUNCTION ARRAYS; PHYSICAL-PROPERTIES; DC MAGNETIZATION; RUSR2GDCU2O8; FERROMAGNET; DISORDER; MODEL; GLASS AB A narrow intragrain phase-lock transition was observed in RuSr2EuCu2O8 under a magnetic field H up to a few Tesla. The corresponding transition temperature T-2 decreases rapidly (approximate to100 K/T at low fields) with H, indicating that the grains of RuSr2EuCu2O8 behave unlike a homogeneous bulk superconductor. Our data suggest that the bulk superconducting transition may occur on a length scale well below the grain size 2-6 mum. C1 Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China. RP Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. NR 21 TC 31 Z9 31 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 17 AR 174503 DI 10.1103/PhysRevB.65.174503 PG 5 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600102 ER PT J AU MacLaughlin, DE Bernal, OO Sonier, JE Heffner, RH Taniguchi, T Miyako, Y AF MacLaughlin, DE Bernal, OO Sonier, JE Heffner, RH Taniguchi, T Miyako, Y TI Susceptibility inhomogeneity and non-Fermi-liquid behavior in Ce(Ru0.5Rh0.5)(2)Si-2 SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC-NONMAGNETIC BOUNDARIES; KONDO DISORDER; MU-SR; SYSTEMS; CE(RU1-XRHX)(2)SI-2; UCU5-XPDX; NMR AB Magnetic susceptibility and muon spin rotation (muSR) experiments have been carried out to study the effect of structural disorder on the non-Fermi-liquid (NFL) behavior of the heavy-fermion alloy Ce(Ru0.5Rh0.5)(2)Si-2. Analysis of the bulk susceptibility in the framework of disorder-driven Griffiths-phase and Kondo-disorder models for NFL behavior yields relatively narrow distributions of characteristic spin-fluctuation energies, in agreement with muSR linewidths that give the inhomogeneous spread in susceptibility. muSR and NMR data both indicate that disorder explains the "nearly NFL" behavior observed above similar to2 K, but does not dominate the NFL physics found at low temperatures and low magnetic fields. C1 Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA 90032 USA. Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Osaka Univ, Grad Sch Sci, Osaka 5600043, Japan. RP Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. NR 21 TC 6 Z9 6 U1 2 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 18 AR 184401 DI 10.1103/PhysRevB.65.184401 PG 6 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700053 ER PT J AU Narozhny, BN Zala, G Aleiner, IL AF Narozhny, BN Zala, G Aleiner, IL TI Interaction corrections at intermediate temperatures: Dephasing time SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-GAS; MAGNETORESISTANCE; SCATTERING; LIFETIME; SYSTEMS; ENERGY; METALS AB We calculate the temperature dependence of the weak-localization correction in a two-dimensional system at arbitrary relation between temperature T and the elastic mean free time. We describe the crossover in the dephasing time tau(Phi)(T) between the high-temperature, 1/tau(Phi)similar or equal toT(2)ln T, and the low-temperature 1/tau(Phi)similar or equal toT behaviors. The prefactors in these dependences are not universal, but are determined by the Fermi-liquid constant characterizing the spin exchange interaction. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. RP Narozhny, BN (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. OI Narozhny, Boris/0000-0001-7933-2945 NR 26 TC 54 Z9 54 U1 3 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 MAY 1 PY 2002 VL 65 IS 18 AR 180202 DI 10.1103/PhysRevB.65.180202 PG 4 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700005 ER PT J AU Reichhardt, C Olson, CJ AF Reichhardt, C Olson, CJ TI Transverse phase locking for vortex motion in square and triangular pinning arrays SO PHYSICAL REVIEW B LA English DT Article ID JOSEPHSON-JUNCTION ARRAYS; CHARGE-DENSITY WAVES; GIANT SHAPIRO STEPS; REGULAR ARRAYS; MODE-LOCKING; LOGARITHMIC INTERACTIONS; SUPERCONDUCTING FILMS; PERIODIC MEDIA; MAGNETIC DOTS; THIN-FILMS AB We analyze transverse phase locking for vortex motion in a superconductor with a longitudinal dc drive and a transverse ac drive. For both square and triangular arrays we observe a variety of fractional phase-locking steps in the velocity versus dc drive which correspond to stable vortex orbits. The locking steps are more pronounced for the triangular arrays which is due to the fact that the vortex motion has a periodic transverse velocity component even for zero transverse ac drive. All the steps increase monotonically in width with ac amplitude. We confirm that the width of some fractional steps in the square arrays scales as the square of the ac driving amplitude. In addition we demonstrate scaling in the velocity versus applied dc driving curves at depinning and on the main step, similar to that seen for phase locking in charge-density-wave systems. The phase-locking steps are most prominent for commensurate vortex fillings where the interstitial vortices form symmetrical ground states. For increasing temperature, the fractional steps are washed out very quickly, while the main step gains a linear component and disappears at melting. For triangular pinning arrays we again observe transverse phase locking, with the main and several of the fractional step widths scaling linearly with ac amplitude. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Reichhardt, C (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. OI Reichhardt, Cynthia/0000-0002-3487-5089 NR 51 TC 6 Z9 6 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 MAY 1 PY 2002 VL 65 IS 17 AR 174523 DI 10.1103/PhysRevB.65.174523 PG 9 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600122 ER PT J AU Ryan, DH Cadogan, JM van Lierop, J AF Ryan, DH Cadogan, JM van Lierop, J TI Reply to "Comment on 'Field dependence of the transverse spin freezing transition' " SO PHYSICAL REVIEW B LA English DT Editorial Material ID EXTERNAL MAGNETIC-FIELD; GLASS; RELAXATION; FERROMAGNET; MOSSBAUER; DYNAMICS AB Muon spin relaxation (muSR) is a more reliable technique for tracking the field dependence of T-xy than Mossbauer spectroscopy. It yields consistent behavior and does not suffer from fitting artifacts. In addition it can be performed both with and without an applied field. Apparent differences between applied-field Mossbauer results and those from muSR derive entirely from difficulties associated with the analysis of the Mossbauer data. C1 McGill Univ, Dept Phys, Montreal, PQ, Canada. McGill Univ, Ctr Phys Mat, Montreal, PQ, Canada. Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia. Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA. RP Ryan, DH (reprint author), McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ, Canada. NR 21 TC 1 Z9 1 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 MAY 1 PY 2002 VL 65 IS 17 AR 176402 DI 10.1103/PhysRevB.65.176402 PG 2 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600131 ER PT J AU Seydel, T Tolan, M Ocko, BM Seeck, OH Weber, R DiMasi, E Press, W AF Seydel, T Tolan, M Ocko, BM Seeck, OH Weber, R DiMasi, E Press, W TI Freezing of capillary waves at the glass transition SO PHYSICAL REVIEW B LA English DT Article ID X-RAY REFLECTIVITY; LIQUID INTERFACES; FORMING GLYCEROL; LENGTH SCALES; FAST DYNAMICS; SURFACE; SPECTROSCOPY; SCATTERING; ROUGHNESS AB The freezing of capillary waves on glycerol surfaces is studied by in situ x-ray reflectivity measurements. A wide temperature range around the calorimetric glass transition temperature at T(g)approximate to186 K is investigated. For T>250 K the obtained surface roughness as a function of the temperature differs significantly from the value predicted by the classical capillary waves theory. Below the temperature Tapproximate to250 K the magnitude of the roughness remains constant. Furthermore, a large hysteresis, i.e., a large difference of the roughnesses measured during cooling and heating of the sample, is observed. These findings are discussed in terms of viscosity effects. C1 Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. Univ Dortmund, D-44221 Dortmund, Germany. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Forschungszentrum Julich, IFF, D-52425 Julich, Germany. Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany. RP Inst Max Von Laue Paul Langevin, BP 156, F-38042 Grenoble, France. EM seydel@ill.fr NR 23 TC 22 Z9 22 U1 2 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 18 AR 184207 DI 10.1103/PhysRevB.65.184207 PG 7 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700049 ER PT J AU Song, C Good, W Wermeille, D Goldman, AI Bud'ko, SL Canfield, PC AF Song, C Good, W Wermeille, D Goldman, AI Bud'ko, SL Canfield, PC TI Magnetic structure of GdAgSb2 determined by x-ray resonant exchange scattering SO PHYSICAL REVIEW B LA English DT Article ID CRYSTAL-STRUCTURE; DICHROISM AB X-ray resonant exchange-scattering experiments were performed on a single crystal of GdAgSb2 to determine the magnetic structure. Long-range antiferromagnetic ordering, characterized by a wave vector of (τ) over right arrow= (1/2 00), develops below the Neel temperature (T-N=13 K), consistent with the dc susceptibility measurements. For the scattering geometry employed in these measurements, the resonant enhancement at the (1/2 08) magnetic peak arises from electric quadrupole transitions only while the resonant enhancement at the (0-1/2 8) magnetic peak arises from electric dipole transitions. Q-dependent integrated intensity measurements were carried out, along with polarization analysis of the scattered beam, and demonstrated that the moments lie in the tetragonal basal plane and are perpendicular to the magnetic wave vector. C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Song, C (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. RI Canfield, Paul/H-2698-2014 NR 16 TC 2 Z9 2 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 MAY 1 PY 2002 VL 65 IS 17 AR 172415 DI 10.1103/PhysRevB.65.172415 PG 4 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600025 ER PT J AU Swenson, CA Fisher, IR Anderson, NE Canfield, PC Migliori, A AF Swenson, CA Fisher, IR Anderson, NE Canfield, PC Migliori, A TI Icosahedral quasicrystal Al71Pd21Mn08 and its xi ' approximant: Linear expansivity, specific heat, magnetic susceptibility, electrical resistivity, and elastic constants SO PHYSICAL REVIEW B LA English DT Article ID AL-PD-MN; DENSITY-OF-STATES; CO QUASI-CRYSTALS; THERMAL-EXPANSION; ELECTRONIC-STRUCTURE; TERNARY MELT; SINGLE-GRAIN; 30 K; AL70MN9PD21; GROWTH AB Linear thermal expansivity (alpha, 1-300 K), heat capacity (C-p, 1-108 K), magnetic susceptibility (chi, 1-300 K), and electrical resistivity (rho, 1-300 K) measurements are reported for a single-grain i-Al71Pd21Mn08 quasicrystal and its Al72Pd25Mn03 approximant, and 300 K elastic constants for the quasicrystal. The approximant alpha (alpha(Ap)) and C-p (C-pAp) data show "metallic" behavior, while the previously reported onset of a transition to a spin-glass state (T-f<1.8 K) dominates alpha(Q) and C-pQ below 11 K. C-pAp and C-pQ superimpose above 16 K when plotted vs T/Theta(0) using the experimental Theta(0Ap)=455(3) K and an adjusted Theta(0ApQ)=480(4) K. The 300 K elastic constants extrapolated to T=0 give Theta(0Q)(el)=505(1) K, suggesting that the normalization is valid only above 16 K. The lattice contribution to C-pAp (and, indirectly, C-pQ) shows strong (unique) deviations from Debye-like behavior (+3% at 0.84 K for the C-pAp data fit). The various Gruneisen parameters (Gamma) that are calculated from these data all are positive and normal in magnitude except for a large limiting approximant lattice value, Gamma(0Ap)(lat)=11.3, which may be related to the large dispersion effects in C-p. For the approximant, the combination of anisotropic and large resistivities, a small diamagnetic susceptibility, and a "large" linear (electronic) contribution to C-pAp (gamma(Ap)=0.794 mJ/mol K-2) suggests the existence of a pseudogap in the electronic density of states. The unusually large, highly volume dependent, dispersion at low temperatures for the quasicrystal and its approximant are not consistent with inelastic neutron scattering and other data, and raise questions about the role of phonons in quasicrystals. The present 300 K resistivities can be used with a published correlation to estimate gamma(Q)approximate to0.25 mJ/mol K-2. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Swenson, CA (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RI Canfield, Paul/H-2698-2014 NR 60 TC 19 Z9 19 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 MAY 1 PY 2002 VL 65 IS 18 AR 184206 DI 10.1103/PhysRevB.65.184206 PG 13 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700048 ER PT J AU Urbano, RR Rettori, C Barberis, GE Torelli, M Bianchi, A Fisk, Z Pagliuso, PG Malinowski, A Hundley, MF Sarrao, JL Oseroff, SB AF Urbano, RR Rettori, C Barberis, GE Torelli, M Bianchi, A Fisk, Z Pagliuso, PG Malinowski, A Hundley, MF Sarrao, JL Oseroff, SB TI Different Gd3+ sites in doped CaB6: An electron spin resonance study SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC IONS; CRYSTAL-FIELD; FERROMAGNETISM; CA1-XLAXB6; TRANSPORT; METALS AB The local environment of Gd3+ (4f(7), S=7/2) ions in single crystals of Ca1-xGdxB6 (0.0001less than or similar toxless than or similar to0.01) is studied by means of electron spin resonance (ESR). The spectra for low concentration samples (xless than or similar to0.001) show a split spectrum due to cubic crystal field effects (CFE). The line shape of each fine structure line is Lorentzian, indicating an insulating environment for the Gd3+ ions. For higher concentrations (0.003less than or similar toxless than or similar to0.01), the spectra show a single resonance [g=1.992(4),DeltaH(1/2)approximate to20-60 Oe] with no CFE and Dysonian line shape indicating metallic environment for the Gd3+ ions. For intermediate concentrations, a coexistence of spectra corresponding to insulating and metallic regions is observed. Most of the measured samples show the weak ferromagnetism (WF) as reported for Ca0.995La0.005B6, but, surprisingly, this WF has no effect in our ESR spectra either for metallic or insulating environments. This result suggests that the WF in these systems might be isolated in clusters (defect-rich regions) and its relationship with metallicity is nontrivial. C1 UNICAMP, IFGW, BR-13083970 Campinas, SP, Brazil. Florida State Univ, NHMFL, Tallahassee, FL 32306 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. San Diego State Univ, San Diego, CA 92182 USA. RP Urbano, RR (reprint author), UNICAMP, IFGW, BR-13083970 Campinas, SP, Brazil. RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Urbano, Ricardo/F-5017-2012; Malinowski, Artur/A-2184-2015; Bianchi, Andrea/E-9779-2010; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; Malinowski, Artur/0000-0003-3771-9353; Bianchi, Andrea/0000-0001-9340-6971; NR 32 TC 14 Z9 14 U1 0 U2 3 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 MAY 1 PY 2002 VL 65 IS 18 AR 180407 DI 10.1103/PhysRevB.65.180407 PG 4 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700014 ER PT J AU Velisavljevic, N Chesnut, GN Vohra, YK Weir, ST Malba, V Akella, J AF Velisavljevic, N Chesnut, GN Vohra, YK Weir, ST Malba, V Akella, J TI Structural and electrical properties of beryllium metal to 66 GPa studied using designer diamond anvils SO PHYSICAL REVIEW B LA English DT Article ID PRESSURE; COMPRESSION; TEMPERATURE; TRANSITIONS; EQUATIONS; STATE AB The structural and electrical properties of alkaline-earth metal beryllium were studied to 66 GPa using designer diamond anvils. The ambient pressure hexagonal close-packed phase was found to be stable to the highest pressure of 66 GPa and the measured static equation of state differs substantially from the one derived from the existing shock wave data. The electrical resistance data at high pressure shows a gradual decrease in resistance to pressure up to 25 GPa followed by a slight increase to 53 GPa. The axial ratio (c/a) remains strongly nonideal with c/a=1.562 at V/V-0=0.708, indicating that deviations from nearly free electron behavior are still dominant at high compressions. C1 Univ Alabama, Dept Phys, Birmingham, AL 35294 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Velisavljevic, N (reprint author), Univ Alabama, Dept Phys, Birmingham, AL 35294 USA. RI Weir, Samuel/H-5046-2012 NR 17 TC 26 Z9 26 U1 2 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 MAY 1 PY 2002 VL 65 IS 17 AR 172107 DI 10.1103/PhysRevB.65.172107 PG 4 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600007 ER PT J AU Wakimoto, S Stock, C Birgeneau, RJ Ye, ZG Chen, W Buyers, WJL Gehring, PM Shirane, G AF Wakimoto, S Stock, C Birgeneau, RJ Ye, ZG Chen, W Buyers, WJL Gehring, PM Shirane, G TI Ferroelectric ordering in the relaxor Pb(Mg1/3Nb2/3)O-3 as evidenced by low-temperature phonon anomalies SO PHYSICAL REVIEW B LA English DT Article ID PHASE-TRANSITION; SINGLE-CRYSTALS; PBMG1/3NB2/3O3; SCATTERING; BEHAVIOR AB Neutron scattering measurements of the lowest-energy TO phonons in the relaxor Pb(Mg1/3Nb2/3)O-3 (PMN) are reported for 10less than or equal toTless than or equal to750 K. The soft mode, which is overdamped by the polar nanoregions below the Burns temperature T-d=620 K, surprisingly recovers below 220 K. The square of the soft-mode energy ((h) over bar omega(0))(2) increases linearly with decreasing temperature and is consistent with the behavior of a ferroelectric soft mode. At 10 K, (h) over bar omega(0) reaches 11 meV, the same value observed in ferroelectric Pb(Zn1/3Nb2/3)O-3 at low T. An unusual broadening of the TA phonon starts at T-d and disappears at 220 K, coincident with the recovery of the TO mode. These dynamics suggest that a well-developed ferroelectric state is established below 220 K. C1 Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada. Natl Res Council Canada, Neutron Program Mat Res, Chalk River, ON K0J 1J0, Canada. Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Wakimoto, S (reprint author), Univ Toronto, Dept Phys, 60 St George St, Toronto, ON M5S 1A7, Canada. NR 23 TC 121 Z9 122 U1 2 U2 14 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 MAY 1 PY 2002 VL 65 IS 17 AR 172105 DI 10.1103/PhysRevB.65.172105 PG 4 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600005 ER PT J AU Wang, YM Zettl, A Ooi, S Tamegai, T AF Wang, YM Zettl, A Ooi, S Tamegai, T TI Vortex penetration into micron-sized Bi2Sr2CaCu2O8+delta SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; IRREVERSIBILITY LINE; II SUPERCONDUCTORS; SURFACE BARRIERS; VORTICES; CRYSTALS AB The onset of vortex penetration into micron-sized Bi2Sr2CaCu2O8+delta disks and squares is studied using local magnetization measurements. The vortex penetration field H-p is observed to exceed the lower critical field H-c1 at all temperatures below the superconducting transition temperature T-c. The magnitude of H-p is determined by sample size and geometry. Below 15 K, H-p is approximately proportional to the sample width D, consistent with the Bean bulk pinning model. Above 15 K, H-p is a function of the sample thickness-to-width ratio t/D, and agrees with the Bean-Livingston surface-barrier effect. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan. RP Wang, YM (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Tamegai, Tsuyoshi /C-6656-2011; Zettl, Alex/O-4925-2016 OI Zettl, Alex/0000-0001-6330-136X NR 19 TC 15 Z9 15 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 MAY 1 PY 2002 VL 65 IS 18 AR 184506 DI 10.1103/PhysRevB.65.184506 PG 4 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700095 ER PT J AU Wosnitza, J Hagel, J Qualls, JS Brooks, JS Balthes, E Schweitzer, D Schlueter, JA Geiser, U Mohtasham, J Winter, RW Gard, GL AF Wosnitza, J Hagel, J Qualls, JS Brooks, JS Balthes, E Schweitzer, D Schlueter, JA Geiser, U Mohtasham, J Winter, RW Gard, GL TI Coherent versus incoherent interlayer transport in layered metals SO PHYSICAL REVIEW B LA English DT Article ID ORGANIC SUPERCONDUCTOR KAPPA-(BEDT-TTF)(2)I-3; FERMI-LIQUID BEHAVIOR; SMALL CLOSED ORBITS; QUASI-2-DIMENSIONAL CONDUCTORS; MAGNETORESISTANCE OSCILLATIONS; MAGNETIC-FIELDS; SR2RUO4; BETA''-(BEDT-TTF)(2)SF5CH2CF2SO3; (TMTSF)(2)PF6; SURFACE AB The magnetic-field, temperature, and angular dependence of the interlayer magnetoresistance of two different quasi-two-dimensional (2D) organic superconductors is reported. For kappa-(BEDT-TTF)(2)I-3, where BEDT-TTF is bisethylenedithio-tetrathiafulvalene, we find a well-resolved peak in the angle-dependent magnetoresistance at Theta=90degrees (field parallel to the layers). This clear-cut proof for the coherent nature of the interlayer transport is absent for beta(')-(BEDT-TTF)(2)SF5CH2CF2SO3. This and the nonmetallic behavior of the magnetoresistance suggest an incoherent quasiparticle motion for the latter 2D metal. C1 Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA. Univ Stuttgart, Inst Phys, D-70550 Stuttgart, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Portland State Univ, Dept Chem, Portland, OR 97207 USA. RP Wosnitza, J (reprint author), Tech Univ Dresden, Inst Angew Phys, D-01062 Dresden, Germany. NR 30 TC 42 Z9 42 U1 1 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 MAY 1 PY 2002 VL 65 IS 18 AR 180506 DI 10.1103/PhysRevB.65.180506 PG 4 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700020 ER PT J AU Wu, GQ Neumeier, JJ Ling, CD Argyriou, DN AF Wu, GQ Neumeier, JJ Ling, CD Argyriou, DN TI Temperature evolution of the crystal structure of La2-xSrxNiO4 (x=1/4 and 1/3) as revealed through neutron powder diffraction SO PHYSICAL REVIEW B LA English DT Article ID PHASE-SEPARATION; STRIPE ORDER; MAGNETIC-PROPERTIES; CHARGE; LA2NIO4+DELTA; LA5/3SR1/3NIO4; LA1.8SR0.2NIO4; LA1-XCAXMNO3; SPECTROSCOPY; DYNAMICS AB The crystal structure of La2-xSrxNiO4 (x=1/4 and 1/3) has been investigated by neutron powder diffraction. These compositions are well known to exhibit charge and spin ordering at T-co and T-so, respectively. The samples remain tetragonal with space group I4/mmm from 300 K down to 20 K. Small changes in the apical Ni-O1 and La/Sr-O1 bond lengths occur at the charge-ordering transition T-co. No unusual effects are found in the NiO2 plane. An analysis of the oxygen atom thermal parameters reveals on enhanced octahedral tilting above T-so, suggesting that charge or spin ordering relaxes the tilting. A static component to the tilting remains at 20 K, but is absent in the long-range symmetry of the structure. These observations suggest the existence of local structural distortions. C1 Florida Atlantic Univ, Dept Phys, Boca Raton, FL 33431 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Florida Atlantic Univ, Dept Phys, Boca Raton, FL 33431 USA. RI Ling, Chris D/B-2228-2009 OI Ling, Chris D/0000-0003-2205-3106 NR 39 TC 12 Z9 12 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 17 AR 174113 DI 10.1103/PhysRevB.174113 PG 8 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600052 ER PT J AU Wu, YZ Won, C Qiu, ZQ AF Wu, YZ Won, C Qiu, ZQ TI Magnetic uniaxial anisotropy of Fe films grown on vicinal Ag(001) SO PHYSICAL REVIEW B LA English DT Article ID MAGNETOCRYSTALLINE ANISOTROPY; FERROMAGNETIC-FILMS; SURFACE ANISOTROPY; CO FILMS; ROUGHNESS; INPLANE; NI/CU(001); MECHANISM; COBALT; W(001) AB Step-induced magnetic anisotropy was investigated in Fe films grown on a vicinal Ag(001) substrate using the surface magneto-optic Kerr effect technique. We found that the step-induced magnetic anisotropy is independent of the Fe film thickness up to 61 ML. Step decoration with Ag or Pd atoms also shows no effect on the step-induced magnetic anisotropy. These results indicate that the step-induced magnetic anisotropy in this system does not localize at the step edges. We suggest that strain inside the Fe film due to the large lattice mismatch between fcc Ag and bcc Fe in the normal direction of the film is the dominant contribution to the step-induced magnetic anisotropy in this system. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Wu, YZ (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI wu, YiZheng/O-1547-2013; Wu, yizheng/P-2395-2014; Qiu, Zi Qiang/O-4421-2016 OI Wu, yizheng/0000-0002-9289-1271; Qiu, Zi Qiang/0000-0003-0680-0714 NR 28 TC 49 Z9 49 U1 1 U2 10 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 MAY 1 PY 2002 VL 65 IS 18 AR 184419 DI 10.1103/PhysRevB.65.184419 PG 6 WC Physics, Condensed Matter SC Physics GA 554VW UT WOS:000175758700071 ER PT J AU Zheludev, A Ressouche, E Tsukada, I Masuda, T Uchinokura, K AF Zheludev, A Ressouche, E Tsukada, I Masuda, T Uchinokura, K TI Structure of multiple spin-flop states in BaCu2Si2O7 SO PHYSICAL REVIEW B LA English DT Article ID WEAK FERROMAGNETISM; ANTIFERROMAGNET; DYNAMICS; CHAINS; FIELD AB The unusual two-stage spin-flop transition in the quasi-one-dimensional S=1/2 antiferromagnet BaCu2Si2O7 is studied by single-crystal neutron diffraction. The staggered magnetization in the system, aligned along the (0,0,1) direction in zero field, rotates towards the (0,1,0) direction at H(c1)approximate to2 T. A second reorientation occurs at H(c2)approximate to4.8 T, when the staggered magnetization aligns itself along (1,0,0). The relative orientations of adjacent spins remain more or less unchanged in the various spin-flop phases. This behavior is inconsistent with the previously proposed theoretical explanation of the two-stage transition. C1 Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. CENG, MDN, SPSMS, DRFMC, F-38054 Grenoble, France. Cent Res Inst Elect Power Ind, Komae, Tokyo 2018511, Japan. Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA. EM zhelud@bigfoot.com NR 15 TC 18 Z9 18 U1 1 U2 11 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAY 1 PY 2002 VL 65 IS 17 AR 174416 DI 10.1103/PhysRevB.65.174416 PG 6 WC Physics, Condensed Matter SC Physics GA 552KM UT WOS:000175619600087 ER PT J AU Aggarwal, MM Ahammed, Z Angelis, ALS Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, V Awes, TC Baba, PVKS Badyal, SK Bathe, S Batiounia, B Bernier, T Bhalla, KB Bhatia, VS Blume, C Bucher, D Busching, H Carlen, L Chattopadhyay, S Decowski, MP Delagrange, H Donni, P Majumdar, MRD El Chenawi, K Dubey, AK Enosawa, K Fokin, S Frolov, V Ganti, MS Garpman, S Gavrishchuk, O Geurts, FJM Ghosh, TK Glasow, R Guskov, B Gustafsson, HA Gutbrod, HH Hrivnacova, I Ippolitov, M Kalechofsky, H Karadjev, K Karpio, K Kolb, BW Kosarev, I Koutcheryaev, I Kugler, A Kulinich, P Kurata, M Lebedev, A Lohner, H Luquin, L Mahapatra, DP Manko, V Martin, M Martinez, G Maximov, A Miake, Y Mishra, GC Mohanty, B Mora, MJ Morrison, D Mukhanova, T Mukhopadhyay, DS Naef, H Nandi, BK Nayak, SK Nayak, TK Nianine, A Nikitine, V Nikolaev, S Nilsson, P Nishimura, S Nomokonov, P Nystrand, J Oskarsson, A Otterlund, I Peitzmann, T Peressounko, D Petracek, V Phatak, SC Pinganaud, W Plasil, F Purschke, ML Rak, J Raniwala, R Raniwala, S Rao, NK Retiere, F Reygers, K Roland, G Rosselet, L Roufanov, I Roy, C Rubio, JM Sambyal, SS Santo, R Sato, S Schlagheck, H Schmidt, HR Schutz, Y Shabratova, G Shah, TH Sibiriak, I Siemiarczuk, T Silvermyr, D Sinha, BC Slavine, N Soderstrom, K Sood, G Sorensen, SP Stankus, P Stefanek, G Steinberg, P Stenlund, E Sumbera, M Svensson, T Tsvetkov, A Tykarski, L von der Pijll, EC von Eijndhoven, N von Nieuwenhuizen, GJ Vinogradov, A Viyogi, YP Vodopianov, A Voros, S Wyslouch, B Young, GR AF Aggarwal, MM Ahammed, Z Angelis, ALS Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, V Awes, TC Baba, PVKS Badyal, SK Bathe, S Batiounia, B Bernier, T Bhalla, KB Bhatia, VS Blume, C Bucher, D Busching, H Carlen, L Chattopadhyay, S Decowski, MP Delagrange, H Donni, P Majumdar, MRD El Chenawi, K Dubey, AK Enosawa, K Fokin, S Frolov, V Ganti, MS Garpman, S Gavrishchuk, O Geurts, FJM Ghosh, TK Glasow, R Guskov, B Gustafsson, HA Gutbrod, HH Hrivnacova, I Ippolitov, M Kalechofsky, H Karadjev, K Karpio, K Kolb, BW Kosarev, I Koutcheryaev, I Kugler, A Kulinich, P Kurata, M Lebedev, A Lohner, H Luquin, L Mahapatra, DP Manko, V Martin, M Martinez, G Maximov, A Miake, Y Mishra, GC Mohanty, B Mora, MJ Morrison, D Mukhanova, T Mukhopadhyay, DS Naef, H Nandi, BK Nayak, SK Nayak, TK Nianine, A Nikitine, V Nikolaev, S Nilsson, P Nishimura, S Nomokonov, P Nystrand, J Oskarsson, A Otterlund, I Peitzmann, T Peressounko, D Petracek, V Phatak, SC Pinganaud, W Plasil, F Purschke, ML Rak, J Raniwala, R Raniwala, S Rao, NK Retiere, F Reygers, K Roland, G Rosselet, L Roufanov, I Roy, C Rubio, JM Sambyal, SS Santo, R Sato, S Schlagheck, H Schmidt, HR Schutz, Y Shabratova, G Shah, TH Sibiriak, I Siemiarczuk, T Silvermyr, D Sinha, BC Slavine, N Soderstrom, K Sood, G Sorensen, SP Stankus, P Stefanek, G Steinberg, P Stenlund, E Sumbera, M Svensson, T Tsvetkov, A Tykarski, L von der Pijll, EC von Eijndhoven, N von Nieuwenhuizen, GJ Vinogradov, A Viyogi, YP Vodopianov, A Voros, S Wyslouch, B Young, GR CA WA98 Collaboration TI Event-by-event fluctuations in particle multiplicities and transverse energy produced in 158A GeVPb plus Pb collisions SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; QUARK-GLUON PLASMA; O-16-NUCLEUS COLLISIONS; PB+PB COLLISIONS; PHASE-TRANSITION; DETECTOR; DISTRIBUTIONS; PHYSICS; QCD AB Event-by-event fluctuations in the multiplicities of charged particles and photons, and the total transverse energy in 158A GeV Pb+Pb collisions are studied for a wide range of centralities. For narrow centrality bins the multiplicity and transverse energy distributions are found to be near perfect Gaussians. The effect of detector acceptance on the multiplicity fluctuations has been studied and demonstrated to follow statistical considerations. The centrality dependence of the charged particle multiplicity fluctuations in the measured data has been found to agree reasonably well with those obtained from a participant model. However, for photons the multiplicity fluctuations have been found to be lower compared to those obtained from a participant model. The multiplicity and transverse energy fluctuations have also been compared to those obtained from the VENUS event generator. C1 Inst Phys, Bhubaneswar 751005, Orissa, India. Punjabi Univ, Chandigarh 160014, India. Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India. Univ Geneva, CH-1211 Geneva 4, Switzerland. RRC Kurchatov Inst, RU-123182 Moscow, Russia. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Jammu, Jammu 180001, India. Univ Munster, D-48149 Munster, Germany. Ecole Mines, SUBATECH, Nantes, France. Univ Rajasthan, Jaipur 302004, Rajasthan, India. Lund Univ, SE-22100 Lund, Sweden. MIT, Cambridge, MA 02139 USA. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Univ Utrecht, NIKHEF, NL-3508 TA Utrecht, Netherlands. Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands. Gesell Schwerionenforsch mbH, D-64220 Darmstadt, Germany. Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic. Inst Nucl Studies, PL-00681 Warsaw, Poland. Univ Tennessee, Knoxville, TN 37966 USA. RP Mohanty, B (reprint author), Inst Phys, Bhubaneswar 751005, Orissa, India. EM bedanga@iopb.res.in RI Decowski, Patrick/A-4341-2011; Peitzmann, Thomas/K-2206-2012; Lohner, Herbert/B-2397-2014; Sumbera, Michal/O-7497-2014 OI Peitzmann, Thomas/0000-0002-7116-899X; Lohner, Herbert/0000-0002-7441-739X; Sumbera, Michal/0000-0002-0639-7323 NR 49 TC 61 Z9 61 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD MAY PY 2002 VL 65 IS 5 AR 054912 DI 10.1103/PhysRevC.65.054912 PG 14 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600070 ER PT J AU Alvarez-Ruso, L Koch, V AF Alvarez-Ruso, L Koch, V TI phi meson propagation in a hot hadronic gas SO PHYSICAL REVIEW C LA English DT Article ID HIDDEN LOCAL SYMMETRIES; HEAVY-ION COLLISIONS; EFFECTIVE CHIRAL LAGRANGIANS; DYNAMICAL GAUGE BOSONS; QUARK-GLUON PLASMA; STRANGENESS PRODUCTION; VECTOR-MESONS; MATTER; TEMPERATURE; ENTROPY AB The hidden local symmetry Lagrangian is used to study the interactions of phi mesons with other pseudoscalar and vector mesons in a hadronic gas at finite temperature. We have found a significantly small phi mean free path (less than 2.4 fm at T>170 MeV) due to large collision rates with rho mesons, kaons, and predominantly K* in spite of their heavy mass. This implies that phi mesons produced after hadronization in relativistic heavy ion collisions will not leave the hadronic system without scattering. The effect of these interactions on the time evolution of the phi density in the expanding hadronic fireball is investigated. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Alvarez-Ruso, L (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 33 TC 36 Z9 36 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 MAY PY 2002 VL 65 IS 5 AR 054901 DI 10.1103/PhysRevC.65.054901 PG 13 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600059 ER PT J AU Amos, K Karataglidis, S AF Amos, K Karataglidis, S TI Total reaction cross sections for neutron-nucleus scattering SO PHYSICAL REVIEW C LA English DT Article ID SHELL AB Neutron total reaction cross sections at 45, 50, 55, 60, 65, and 75 MeV from nuclei C-12, Si-28, Fe-56, Zr-90, and Pb-208 have been measured and are compared with (microscopic) optical model predictions. The optical potentials were obtained in coordinate space by folding effective nucleon-nucleon interactions with realistic nuclear ground state density matrices. The agreement found is good to excellent. C1 Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Amos, K (reprint author), Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia. NR 12 TC 9 Z9 10 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 MAY PY 2002 VL 65 IS 5 AR 057603 DI 10.1103/PhysRevC.65.057603 PG 3 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600085 ER PT J AU Bender, M Dobaczewski, J Engel, J Nazarewicz, W AF Bender, M Dobaczewski, J Engel, J Nazarewicz, W TI Gamow-Teller strength and the spin-isospin coupling constants of the Skyrme energy functional SO PHYSICAL REVIEW C LA English DT Review ID HARMONIC-OSCILLATOR BASIS; HARTREE-FOCK EQUATIONS; NUCLEAR-STRUCTURE CALCULATIONS; RANDOM-PHASE-APPROXIMATION; DENSITY-MATRIX EXPANSION; GROUND-STATE PROPERTIES; TIME-ODD COMPONENTS; MEAN-FIELD-THEORY; BETA-DECAY; SUPERDEFORMED NUCLEI AB We investigate the effects of the spin-isospin channel of the Skyrme energy functional on predictions for Gamow-Teller distributions and superdeformed rotational bands. We use the generalized Skyrme interaction SkO' to describe even-even ground states and then analyze the effects of time-odd spin-isospin couplings, first term by term and then together via linear regression. Some terms affect the strength and energy of the Gamow-Teller resonance in finite nuclei without altering the Landau parameter g(0)' that to leading order determines spin-isospin properties of nuclear matter. Though the existing data are not sufficient to uniquely determine all the spin-isospin couplings, we are able to fit them locally. Altering these coupling constants does not change the quality with which the Skyrme functional describes rotational bands. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Free Univ Brussels, Serv Phys Nucl Theor, B-1050 Brussels, Belgium. Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. RP Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RI Bender, Michael/B-9004-2009 NR 101 TC 165 Z9 165 U1 0 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD MAY PY 2002 VL 65 IS 5 AR 054322 DI 10.1103/PhysRevC.65.054322 PG 19 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600039 ER PT J AU Brown, BA Barker, FC Millener, DJ AF Brown, BA Barker, FC Millener, DJ TI Di-proton decay of the 6.15 MeV 1(-) state in Ne-18 SO PHYSICAL REVIEW C LA English DT Article ID O-12 GROUND-STATE; 2-PROTON RADIOACTIVITY; BETA-DECAY; EMISSION AB The widths for one- and two-proton decay of the 1(2)(-) state in Ne-18 are calculated. Shell-model wave functions are used to obtain the spectroscopic factors. The R-matrix theory of Barker which incorporates the final-state interaction between the two protons is used for the di-proton decay model. The calculated widths for both one- and two-proton decay are in qualitative agreement with experiment. We find that the decay width for sequential two-proton decay through the ghost of the 1/2(+) bound state in F-17 is comparable to the width of the direct di-proton decay. C1 Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Theoret Phys, Canberra, ACT 0200, Australia. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Brown, BA (reprint author), Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. NR 13 TC 27 Z9 28 U1 1 U2 1 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 MAY PY 2002 VL 65 IS 5 AR 051309 DI 10.1103/PhysRevC.65.051309 PG 3 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600010 ER PT J AU Caggiano, JA Bradfield-Smith, W Lewis, R Parker, PD Visser, DW Greene, JP Rehm, KE Bardayan, DW Champagne, AE AF Caggiano, JA Bradfield-Smith, W Lewis, R Parker, PD Visser, DW Greene, JP Rehm, KE Bardayan, DW Champagne, AE TI Identification of new states in Si-26 using the Si-29(He-3,He-6)Si-26 reaction and consequences for the Al-25(p,gamma)Si-26 reaction rate in explosive hydrogen burning environments SO PHYSICAL REVIEW C LA English DT Article ID ENERGY-LEVELS AB We have studied the Si-29(He-3,He-6)Si-26 reaction and have identified new states in Si-26 at E-x=5.140(10), E-x=5.678(8) MeV, and E-x=5.945(8). Based on these measurements and other recent evidence, we suggest spin-parity assignments of 1(+) for the 5.678 MeV state and 3(+) for the 5.945 MeV state, which would account for all the "missing" unnatural parity states in Si-26 in the excitation energy region important to hydrogen burning in novae. New reaction rates are presented for the Al-25(p,gamma)Si-26 reaction based on this possible assignment of states. C1 Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27708 USA. RP Caggiano, JA (reprint author), Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. RI Visser, Dale/A-8117-2009 OI Visser, Dale/0000-0002-2891-4731 NR 12 TC 32 Z9 32 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 MAY PY 2002 VL 65 IS 5 AR 055801 DI 10.1103/PhysRevC.65.055801 PG 6 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600079 ER PT J AU Ginocchio, JN AF Ginocchio, JN TI Pseudospin and spin symmetry in nucleon-nucleon scattering SO PHYSICAL REVIEW C LA English DT Article ID WAVE-FUNCTIONS; TRANSITIONS; ALIGNMENT AB The orthogonal transformation from the spin representation to the pseudospin representation for the nucleon-nucleon scattering matrix is derived. The phase shifts and mixing angles are calculated in the pseudospin representation using the measured phase shifts and mixing angles in the spin representation. The scattering matrix in both representations is investigated and the extent of spin and pseudospin symmetry violation is determined. Finally, a speculation is made that the pseudospin symmetry generators relevant for relativistic mean field models and optical models may need to be generalized for the two-nucleon interaction. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Ginocchio, JN (reprint author), Los Alamos Natl Lab, Div Theoret, MS B283, Los Alamos, NM 87545 USA. NR 22 TC 14 Z9 14 U1 0 U2 1 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 MAY PY 2002 VL 65 IS 5 AR 054002 DI 10.1103/PhysRevC.65.054002 PG 8 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600015 ER PT J AU Guber, KH Sayer, RO Valentine, TE Leal, LC Spencer, RR Harvey, JA Koehler, PE Rauscher, T AF Guber, KH Sayer, RO Valentine, TE Leal, LC Spencer, RR Harvey, JA Koehler, PE Rauscher, T TI New Maxwellian averaged neutron capture cross sections for Cl-35,Cl-37 SO PHYSICAL REVIEW C LA English DT Article ID TRANSMISSION MEASUREMENTS; SCATTERING; CL-35 AB The Oak Ridge Electron Linear Accelerator (ORELA) was used to measure neutron total and capture cross sections of natural chlorine in the energy range from 100 eV to 600 keV. We performed an R-matrix analysis of our new capture and transmission data up to 500 keV. From these resonance parameters new (n, gamma) astrophysical reaction rates were determined over the entire energy range needed by the latest stellar models of the s process. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Basel, Inst Phys, CH-4046 Basel, Switzerland. RP Sayer, RO (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RI Rauscher, Thomas/D-2086-2009 OI Rauscher, Thomas/0000-0002-1266-0642 NR 26 TC 7 Z9 7 U1 0 U2 3 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 MAY PY 2002 VL 65 IS 5 AR 058801 DI 10.1103/PhysRevC.65.058801 PG 4 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600088 ER PT J AU Hayes, AC Zanini, L AF Hayes, AC Zanini, L TI Parity violation in partial neutron capture reactions SO PHYSICAL REVIEW C LA English DT Article ID NONCONSERVATION; RESONANCES; U-238; DEPENDENCE AB We point out that, in the standard resonance theory of parity violation in the compound nucleus, the longitudinal parity violating asymmetry in partial neutron capture cross sections is essentially independent of the partial gamma widths involved. Thus, the same asymmetry is expected for each partial cross section involving the same p-wave resonance. The asymmetries are expected to be enhanced (similar to10%), and asymmetry measurements for several partial capture cross sections from a given p-wave resonance would provide a very strong test of the theory. In particular, such a measurement could shed light on the origin of the sign problem observed in Th-232 and could provide more accurate determinations of the parity violating matrix elements between compound resonances. We propose a class of experiments and examine their feasibility. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Hayes, AC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 17 TC 1 Z9 1 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 MAY PY 2002 VL 65 IS 5 AR 058501 DI 10.1103/PhysRevC.65.058501 PG 4 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600087 ER PT J AU Hecht, MB Roberts, CD Oettel, M Thomas, AW Schmidt, SM Tandy, PC AF Hecht, MB Roberts, CD Oettel, M Thomas, AW Schmidt, SM Tandy, PC TI Nucleon mass and pion loops SO PHYSICAL REVIEW C LA English DT Article ID CLOUDY-BAG MODEL; JONA-LASINIO MODEL; INCORPORATING CHIRAL-SYMMETRY; ELECTROMAGNETIC FORM-FACTORS; SCHWINGER-DYSON EQUATION; QUARK PROPAGATOR; FADDEEV APPROACH; BARYON STRUCTURE; DIQUARK MASSES; BETHE-SALPETER AB Poincare covariant Faddeev equations for the nucleon and Delta are solved to illustrate that an internally consistent description in terms of confined-quark and non-point-like confined-diquark correlations can be obtained. piN-loop induced self-energy corrections to the nucleon's mass are analyzed and shown to be independent of whether a pseudoscalar or pseudovector coupling is used. Phenomenological constraints suggest that this self-energy correction reduces the nucleon's mass by up to several hundred MeV. That effect does not qualitatively alter the picture, suggested by the Faddeev equation, that baryons are quark-diquark composites. However, neglecting the pi loops leads to a quantitative overestimate of the nucleon's axial-vector diquark component. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia. Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany. Kent State Univ, Dept Phys, Nucl Res Ctr, Kent, OH 44242 USA. RP Argonne Natl Lab, Div Phys, Bldg 203, Argonne, IL 60439 USA. RI Oettel, Martin/C-4417-2008; Thomas, Anthony/G-4194-2012 OI Oettel, Martin/0000-0002-1128-2045; Thomas, Anthony/0000-0003-0026-499X NR 83 TC 51 Z9 51 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 MAY PY 2002 VL 65 IS 5 AR 055204 DI 10.1103/PhysRevC.65.055204 PG 17 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600074 ER PT J AU Hwang, JK Ramayya, AV Hamilton, JH Beyer, CJ Zhang, XQ Rasmussen, JO Luo, YX Wu, SC Ginter, TN Lee, IY Folden, CM Fallon, P Zielinski, P Gregorich, KE Macchiavelli, AO Stoyer, MA Asztalos, SJ AF Hwang, JK Ramayya, AV Hamilton, JH Beyer, CJ Zhang, XQ Rasmussen, JO Luo, YX Wu, SC Ginter, TN Lee, IY Folden, CM Fallon, P Zielinski, P Gregorich, KE Macchiavelli, AO Stoyer, MA Asztalos, SJ TI pi 7/2[413] rotational band and high spin states in odd-mass Ag-115,Ag-117 SO PHYSICAL REVIEW C LA English DT Article ID SPONTANEOUS FISSION; NUCLEI; SHAPES; CF-252 AB Twenty four and twenty two new excited states are proposed in neutron-rich Ag-115,Ag-117, respectively. These new results came from new works in Gammasphere measuring greater than or equal to triple- and higher-fold prompt coincidences following the spontaneous fission of Cf-252. The pi7/2[413] rotational bands are identified in Ag-115,Ag-117, along with higher bands of uncertain structures. A doublet structure in some bands is suggestive of softness toward triaxiality. C1 Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. MIT, Cambridge, MA 02139 USA. RP Hwang, JK (reprint author), Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA. RI Folden, Charles/F-1033-2015 OI Folden, Charles/0000-0002-2814-3762 NR 12 TC 13 Z9 14 U1 0 U2 1 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 MAY PY 2002 VL 65 IS 5 AR 054314 DI 10.1103/PhysRevC.65.054314 PG 5 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600031 ER PT J AU Liang, JF Beene, JR Esbensen, H Galindo-Uribarri, A del Campo, JG Gross, CJ Halbert, ML Mueller, PE Shapira, D Stracener, DW Thompson, IJ Varner, RL AF Liang, JF Beene, JR Esbensen, H Galindo-Uribarri, A del Campo, JG Gross, CJ Halbert, ML Mueller, PE Shapira, D Stracener, DW Thompson, IJ Varner, RL TI Elastic scattering and breakup of F-17 at 10 MeV/nucleon SO PHYSICAL REVIEW C LA English DT Article ID HALO NUCLEI; REACTION-MECHANISM; COULOMB BARRIER; B-8 BREAKUP; ENERGIES; BE-11; BEAMS; MODEL AB Angular distributions of fluorine and oxygen produced from 170 MeV F-17 incident on Pb-208 were measured. The elastic scattering data are in good agreement with optical model calculations using a double-folding potential and parameters similar to those obtained from O-16+Pb-208. A large yield of oxygen was observed near theta(lab) = 36degrees. It is reproduced fairly well by a calculation of the (F-17,O-16) breakup, which is dominated by one-proton stripping reactions. The discrepancy between our previous coincidence measurement and theoretical predictions was resolved by including core absorption in the present calculation. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. Univ Surrey, Dept Phys, Guildford GU2 5XH, Surrey, England. RP Liang, JF (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 28 TC 22 Z9 22 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 MAY PY 2002 VL 65 IS 5 AR 051603 DI 10.1103/PhysRevC.65.051603 PG 5 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600013 ER PT J AU Lipoglavsek, M Baktash, C Carpenter, MP Dean, DJ Engeland, T Fahlander, C Hjorth-Jensen, M Janssens, RVF Likar, A Nyberg, J Osnes, E Paul, SD Piechaczek, A Radford, DC Rudolph, D Seweryniak, D Sarantites, DG Vencelj, M Yu, CH AF Lipoglavsek, M Baktash, C Carpenter, MP Dean, DJ Engeland, T Fahlander, C Hjorth-Jensen, M Janssens, RVF Likar, A Nyberg, J Osnes, E Paul, SD Piechaczek, A Radford, DC Rudolph, D Seweryniak, D Sarantites, DG Vencelj, M Yu, CH TI Excited states of the proton emitter Sb-105 SO PHYSICAL REVIEW C LA English DT Article AB Excited states in the proton emitter Sb-105 have been investigated for the first time. The nucleus was populated in the reaction Cr-50(Ni-58,1p2n). The GAMMASPHERE Ge-detector array was used together with Microball and the Neutron Shell for selection of the reaction channel. The experimental level scheme agrees well with results of a shell model calculation that uses realistic effective interactions derived from the CD-Bonn nucleon-nucleon interaction and Sn-100 as a closed-shell core. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Jozef Stefan Inst, Ljubljana, Slovenia. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Oslo, Dept Phys, Oslo, Norway. Lund Univ, Dept Phys, Lund, Sweden. Uppsala Univ, Dept Neutron Res, Uppsala, Sweden. Louisiana State Univ, Baton Rouge, LA 70803 USA. Washington Univ, Dept Chem, St Louis, MO 63130 USA. RP Lipoglavsek, M (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RI Rudolph, Dirk/D-4259-2009; Hjorth-Jensen, Morten/B-1417-2008; radford, David/A-3928-2015; Carpenter, Michael/E-4287-2015 OI Rudolph, Dirk/0000-0003-1199-3055; Carpenter, Michael/0000-0002-3237-5734 NR 11 TC 9 Z9 9 U1 0 U2 5 PU AMER 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 MAY PY 2002 VL 65 IS 5 AR 051307 DI 10.1103/PhysRevC.65.051307 PG 4 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600008 ER PT J AU Paul, ES Boston, AJ Chantler, HJ Nolan, PJ Carpenter, MP Janssens, RVF Kondev, FG Seweryniak, D Chiara, CJ Fossan, DB Koike, T Starosta, K LaFosse, DR Fletcher, AM Lisle, JC Patel, D Smith, JF Reviol, W Sarantites, DG Wadsworth, R Wilson, AN Ragnarsson, I AF Paul, ES Boston, AJ Chantler, HJ Nolan, PJ Carpenter, MP Janssens, RVF Kondev, FG Seweryniak, D Chiara, CJ Fossan, DB Koike, T Starosta, K LaFosse, DR Fletcher, AM Lisle, JC Patel, D Smith, JF Reviol, W Sarantites, DG Wadsworth, R Wilson, AN Ragnarsson, I TI Core-excited smoothly terminating band in Xe-114 SO PHYSICAL REVIEW C LA English DT Article ID GAMMA-RAY SPECTROSCOPY; COINCIDENCE DATA SETS; HIGH-SPIN; ROTATIONAL BANDS; MASS REGION; LIFETIME MEASUREMENTS; CHANNEL-SELECTION; COLLECTIVITY; GAMMASPHERE AB High-spin states have been studied in neutron-deficient Xe-114(54), populated through the Ni-58(Ni-58,2p) fusion-evaporation reaction at 230 MeV. The Gammasphere gamma-ray spectrometer has been used in conjunction with the Microball charged-particle detector in order to select evaporation residues of interest. The yrast band has been greatly extended to a tentative spin of 52 (h) over bar and shows features consistent with smooth band termination. This band represents the first evidence for a core-excited (six-particle, two-hole) proton configuration above Z = 53. C1 Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England. Washington Univ, Dept Chem, St Louis, MO 63130 USA. Univ York, Dept Phys, York YO1 5DD, N Yorkshire, England. Lund Inst Technol, Dept Math Phys, S-22100 Lund, Sweden. RP Paul, ES (reprint author), Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. RI Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 24 TC 2 Z9 2 U1 0 U2 1 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 MAY PY 2002 VL 65 IS 5 AR 051308 DI 10.1103/PhysRevC.65.051308 PG 4 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600009 ER PT J AU Randrup, J AF Randrup, J TI Charged-pion correlations caused by chiral relaxation dynamics in high-energy nuclear collisions SO PHYSICAL REVIEW C LA English DT Article ID LINEAR SIGMA-MODEL; FIELD TREATMENT; CONDENSATE; DCC; FLUCTUATION; SEARCH AB For cylindrical systems endowed with a longitudinal Bjorken scaling expansion, the semiclassical linear sigma model is employed to calculate the self-consistent dynamical evolution from the initially hot configuration towards the asymptotic state of freely moving pions. The correlation function for charge-conjugate soft pions with similar rapidities and transverse energies exhibits pronounced azimuthal anticorrelations that may be used to probe the nonequilibrium chiral relaxation dynamics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Randrup, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 21 TC 1 Z9 1 U1 0 U2 1 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 MAY PY 2002 VL 65 IS 5 AR 054906 DI 10.1103/PhysRevC.65.054906 PG 8 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600064 ER PT J AU Rech, GA Browne, E Goldman, ID Schima, FJ Norman, EB AF Rech, GA Browne, E Goldman, ID Schima, FJ Norman, EB TI Half-life of the 6.3-keV isomer in Sn-121 SO PHYSICAL REVIEW C LA English DT Article AB We present a measurement of the half-life of Sn-121(m), obtaining a value of 43.9+/-0.5 yr. In the same experiment, we measured a half-life of 21.8+/-0.3 yr for Pb-210 to verify the reliable performance of our data acquisition system and analysis methods. Our experimental Sn-121(m) half-life is consistent with 49 yr, a value predicted on the basis of the systematic trend of the M4 isomeric gamma-ray transition in Sn-117 and Sn-119. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. RP Rech, GA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 12 TC 4 Z9 4 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 MAY PY 2002 VL 65 IS 5 AR 057302 DI 10.1103/PhysRevC.65.057302 PG 3 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600082 ER PT J AU Rowe, MW Batchelder, JC Ginter, TN Gregorich, KE Guo, FQ Hessberger, FP Ninov, V Powell, J Toth, KS Xu, XJ Cerny, J AF Rowe, MW Batchelder, JC Ginter, TN Gregorich, KE Guo, FQ Hessberger, FP Ninov, V Powell, J Toth, KS Xu, XJ Cerny, J TI Decay of Tl-178 SO PHYSICAL REVIEW C LA English DT Article ID NEUTRON-DEFICIENT ISOTOPES; Z=82 SHELL CLOSURE; PROTON DRIP-LINE; ALPHA-DECAY; SHAPE COEXISTENCE; RADIOACTIVITY; MERCURY; STATES; NUCLEI AB The isotope Tl-178 was produced in a bombardment of Pd-102 by Kr-78 ions at 340 MeV. Reaction products were separated from the beam by the Berkeley Gas-Filled Separator, and implanted into a silicon strip detector where the subsequent alpha decays were measured. Four distinct alpha transitions from Tl-178 were observed correlated to 6.54 MeV alpha decays from the previously known Au-174 daughter. In some cases, the Au-174 decay was followed by a 5.815-MeV alpha decay. This new transition is tentatively assigned to the decay of the Ir-170 ground state. The half-life of Tl-178 was measured to be 254(-9)(+11) ms. The alpha decay branch of Au-174 was determined to be 90(6)%. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Oak Ridge Associated Univ, UNIRIB, Oak Ridge, TN 37831 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Gesell Schwerionenforsch mbH, Darmstadt, Germany. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Rowe, MW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 24 TC 19 Z9 19 U1 0 U2 1 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 MAY PY 2002 VL 65 IS 5 AR 054310 DI 10.1103/PhysRevC.65.054310 PG 8 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600027 ER PT J AU Schiavilla, R Wiringa, RB AF Schiavilla, R Wiringa, RB TI Weak transitions in A=6 and 7 nuclei SO PHYSICAL REVIEW C LA English DT Article ID MONTE-CARLO CALCULATIONS; FEW-BODY NUCLEI; FORM-FACTORS; CROSS-SECTIONS; CAPTURE; CURRENTS; 3-BODY AB The He-6 beta decay and Be-7 electron capture processes are studied using variational Monte Carlo wave functions, derived from a realistic Hamiltonian consisting of the Argonne v(18) two-nucleon and Urbana-IX three-nucleon interactions. The model for the nuclear weak axial current includes one- and two-body operators with the strength of the leading two-body term-associated with Delta-isobar excitation of the nucleon-adjusted to reproduce the Gamow-Teller matrix element in tritium beta decay. The measured half-life of He-6 is underpredicted by theory by similar or equal to8%, while that of Be-7 for decay into the ground and first excited states of Li-7 is overpredicted by similar or equal to9%. However, the experimentally known branching ratio for these latter processes is in good agreement with the calculated value. Two-body axial current contributions lead to a similar or equal to1.7% (4.4%) increase in the value of the Gamow-Teller matrix element of He-6 (Be-7), obtained with one-body currents only, and slightly worsen (appreciably improve) the agreement between the calculated and measured half-life. Corrections due to retardation effects associated with the finite lepton momentum transfers involved in the decays, as well as contributions of suppressed transitions induced by the weak vector charge and axial current operators, have also been calculated and found to be negligible. C1 Jefferson Lab, Newport News, VA 23606 USA. Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Jefferson Lab, Newport News, VA 23606 USA. RI Wiringa, Robert/M-4970-2015 NR 37 TC 34 Z9 34 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 MAY PY 2002 VL 65 IS 5 AR 054302 DI 10.1103/PhysRevC.65.054302 PG 13 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600019 ER PT J AU Srivastava, BK Scharenberg, RP Albergo, S Bieser, F Brady, FP Caccia, Z Cebra, DA Chacon, AD Chance, JL Choi, Y Costa, S Elliott, JB Gilkes, ML Hauger, JA Hirsch, AS Hjort, EL Insolia, A Justice, M Keane, D Kintner, JC Lindenstruth, V Lisa, MA Matis, HS McMahan, M McParland, C Muller, WFJ Olson, DL Partlan, MD Porile, NT Potenza, R Rai, G Rasmussen, J Ritter, HG Romanski, J Romero, JL Russo, GV Sann, H Scott, A Shao, Y Symons, TJM Tincknell, M Tuve, C Wang, S Warren, P Wieman, HH Wienold, T Wolf, K AF Srivastava, BK Scharenberg, RP Albergo, S Bieser, F Brady, FP Caccia, Z Cebra, DA Chacon, AD Chance, JL Choi, Y Costa, S Elliott, JB Gilkes, ML Hauger, JA Hirsch, AS Hjort, EL Insolia, A Justice, M Keane, D Kintner, JC Lindenstruth, V Lisa, MA Matis, HS McMahan, M McParland, C Muller, WFJ Olson, DL Partlan, MD Porile, NT Potenza, R Rai, G Rasmussen, J Ritter, HG Romanski, J Romero, JL Russo, GV Sann, H Scott, A Shao, Y Symons, TJM Tincknell, M Tuve, C Wang, S Warren, P Wieman, HH Wienold, T Wolf, K CA EOS Collaboration TI Multifragmentation and the phase transition: A systematic study of the multifragmentation of 1A GeVAu, La, and Kr SO PHYSICAL REVIEW C LA English DT Review ID HEAVY-ION COLLISIONS; INTRANUCLEAR CASCADE CALCULATION; PROTON-NUCLEUS INTERACTIONS; SMALL PERCOLATION LATTICES; LIQUID-GAS TRANSITION; STATISTICAL MULTIFRAGMENTATION; HOT NUCLEI; CRITICAL-BEHAVIOR; GOLD NUCLEI; FRAGMENTATION REACTIONS AB A systematic analysis of multifragmentation (MF) in fully reconstructed events from 1A GeV Au, La, and Kr collisions with C has been performed. These data are used to provide a definitive test of the variable volume version of the statistical multifragmentation model (SMM). A single set of SMM parameters directly determined by the data and the semi-empirical mass formula are used after the adjustable inverse level density parameter epsilon(0) is determined by the fragment distributions. The results from SMM for second stage multiplicity, size of the biggest fragment, and the intermediate mass fragments are in excellent agreement with the data. Multifragmentation thresholds have been obtained for all three systems using SMM prior to secondary decay. The data indicate that both thermal excitation energy E-th* and the isotope ratio temperature THe-DT decrease with increase in system size at the critical point. The breakup temperature obtained from SMM also shows the same trend as seen in the data. The SMM model is used to study the nature of the MF phase transition. The caloric curve for Kr exhibits back-bending (finite latent heat) while the caloric curves for Au and La are consistent with a continuous phase transition (nearly zero latent heat) and the values of the critical exponents tau, beta, and gamma, both from data and SMM, are close to those for a "liquid-gas" system for Au and La. We conclude that the larger Coulomb expansion energy in Au and La reduces the latent heat required for MF and changes the nature of the phase transition. Thus the Coulomb energy plays a major role in nuclear MF. C1 Purdue Univ, W Lafayette, IN 47907 USA. Univ Catania, I-95129 Catania, Italy. Ist Nazl Fis Nucl, Sez Catania, I-95129 Catania, Italy. Univ Calif Davis, Davis, CA 95616 USA. GSI Darmstadt, D-64220 Darmstadt, Germany. Kent State Univ, Kent, OH 44242 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Texas A&M Univ, College Stn, TX 77843 USA. RP Purdue Univ, W Lafayette, IN 47907 USA. RI Insolia, Antonio/M-3447-2015; TUVE', Cristina/P-3933-2015 OI Insolia, Antonio/0000-0002-9040-1566; TUVE', Cristina/0000-0003-0739-3153 NR 102 TC 30 Z9 30 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 MAY PY 2002 VL 65 IS 5 AR 054617 DI 10.1103/PhysRevC.65.054617 PG 15 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600058 ER PT J AU Verde, G Brown, DA Danielewicz, P Gelbke, CK Lynch, WG Tsang, MB AF Verde, G Brown, DA Danielewicz, P Gelbke, CK Lynch, WG Tsang, MB TI Imaging sources with fast and slow emission components SO PHYSICAL REVIEW C LA English DT Article ID 2-PROTON CORRELATION-FUNCTIONS; BOSE-EINSTEIN CORRELATIONS; HEAVY-ION COLLISIONS; RELATIVISTIC NUCLEAR COLLISIONS; PROTON-PROTON CORRELATIONS; SPACE-TIME EVOLUTION; INTENSITY INTERFEROMETRY; FRAGMENTATION; DENSITY; 2-PION AB We investigate two-proton correlation functions for reactions in which fast dynamical and slow evaporative proton emission are both present. In such cases, the width of the correlation peak provides the most reliable information about the source size of the fast dynamical component. The maximum of the correlation function is sensitive to the relative yields from the slow and fast emission components. Numerically inverting the correlation function allows one to accurately disentangle fast dynamical from slow evaporative emission and extract details of the shape of the two-proton source. C1 Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Verde, G (reprint author), Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. RI Verde, Giuseppe/J-3609-2012; Lynch, William/I-1447-2013 OI Lynch, William/0000-0003-4503-176X NR 31 TC 44 Z9 44 U1 0 U2 2 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 MAY PY 2002 VL 65 IS 5 AR 054609 DI 10.1103/PhysRevC.65.054609 PG 5 WC Physics, Nuclear SC Physics GA 555BH UT WOS:000175772600050 ER PT J AU Aalseth, CE Avignone, FT Brodzinski, RL Cebrian, S Garcia, E Gonzalez, D Hensley, WK Irastorza, IG Kirpichnikov, IV Klimenko, AA Miley, HS Morales, A Morales, J de Solorzano, AO Osetrov, SB Pogosov, VS Puimedon, J Reeves, JH Sarsa, ML Smolnikov, AA Starostin, AS Tamanyan, AG Vasenko, AA Vasiliev, SI Villar, JA AF Aalseth, CE Avignone, FT Brodzinski, RL Cebrian, S Garcia, E Gonzalez, D Hensley, WK Irastorza, IG Kirpichnikov, IV Klimenko, AA Miley, HS Morales, A Morales, J de Solorzano, AO Osetrov, SB Pogosov, VS Puimedon, J Reeves, JH Sarsa, ML Smolnikov, AA Starostin, AS Tamanyan, AG Vasenko, AA Vasiliev, SI Villar, JA CA IGEX Collaboration TI IGEX Ge-76 neutrinoless double-beta decay experiment: Prospects for next generation experiments SO PHYSICAL REVIEW D LA English DT Article ID 0.1 EV RANGE; MASS-SPECTRUM; OSCILLATION; SUPPRESSION; CONSTRAINTS; RESPONSES; DETECTOR; SEARCH; LIMITS; MO-100 AB The International Germanium Experiment (IGEX) has analyzed 117 mol yr of Ge-76 data from its isotopically enriched (86% Ge-76) germanium detectors. Applying pulse-shape discrimination to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of Ge-76 is T-1/2(0nu) >1.57 x 10(25) yr (90% C.L.). This corresponds to an upper bound in the Majorana neutrino mass parameter, [m(nu)], between 0.33 and 1.35 eV, depending on the choice of theoretical nuclear matrix elements used in the analysis. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ S Carolina, Columbia, SC 29208 USA. Univ Zaragoza, E-50009 Zaragoza, Spain. Inst Theoret & Expt Phys, Moscow 117259, Russia. Baksan Neutrino Observ, Inst Nucl Res, Neutrino 361609, Russia. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Pacific NW Natl Lab, Richland, WA 99352 USA. RI Irastorza, Igor/B-2085-2012; Sarsa Sarsa, Maria Luisa/K-6108-2014; Villar, Jose Angel/K-6630-2014 OI Irastorza, Igor/0000-0003-1163-1687; Sarsa Sarsa, Maria Luisa/0000-0002-7552-1228; Villar, Jose Angel/0000-0003-0228-7589 NR 58 TC 299 Z9 300 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 092007 DI 10.1103/PhysRevD.65.092007 PN A PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500017 ER PT J AU Abe, K Abe, K Abe, T Adam, I Akimoto, H Aston, D Baird, KG Baltay, C Band, HR Barklow, TL Bauer, JM Bellodi, G Berger, R Blaylock, G Bogart, JR Bower, GR Brau, JE Breidenbach, M Bugg, WM Burke, D Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cook, V Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Etzion, E Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Huynh, X Iwasaki, M Jackson, DJ Jacques, P Jaros, JA Jiang, ZY Johnson, AS Johnson, JR Kajikawa, R Kalelkar, M Kang, HJ Kofler, RR Kroeger, RS Langston, M Leith, DWG Lia, V Lin, C Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T McKemey, AK Messner, R Moffeit, KC Moore, TB Morii, M Muller, D Murzin, V Narita, S Nauenberg, U Neal, H Nesom, G Oishi, N Onoprienko, D Osborne, LS Panvini, RS Park, CH Peruzzi, I Piccolo, M Piemontese, L Plano, RJ Prepost, R Prescott, CY Ratcliff, BN Reidy, J Reinertsen, PL Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schalk, T Schumm, BA Schwiening, J Serbo, VV Shapiro, G Sinev, NB Snyder, JA Staengle, H Stahl, A Stamer, P Steiner, H Su, D Suekane, F Sugiyama, A Suzuki, A Swartz, M Taylor, FE Thom, J Torrence, E Usher, T Va'vra, J Verdier, R Wagner, DL Waite, AP Walston, S Weidemann, AW Weiss, ER Whitaker, JS Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Wittlin, JL Woods, M Wright, TR Yamamoto, RK Yashima, J Yellin, SJ Young, CC Yuta, H AF Abe, K Abe, K Abe, T Adam, I Akimoto, H Aston, D Baird, KG Baltay, C Band, HR Barklow, TL Bauer, JM Bellodi, G Berger, R Blaylock, G Bogart, JR Bower, GR Brau, JE Breidenbach, M Bugg, WM Burke, D Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cook, V Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Etzion, E Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Huynh, X Iwasaki, M Jackson, DJ Jacques, P Jaros, JA Jiang, ZY Johnson, AS Johnson, JR Kajikawa, R Kalelkar, M Kang, HJ Kofler, RR Kroeger, RS Langston, M Leith, DWG Lia, V Lin, C Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T McKemey, AK Messner, R Moffeit, KC Moore, TB Morii, M Muller, D Murzin, V Narita, S Nauenberg, U Neal, H Nesom, G Oishi, N Onoprienko, D Osborne, LS Panvini, RS Park, CH Peruzzi, I Piccolo, M Piemontese, L Plano, RJ Prepost, R Prescott, CY Ratcliff, BN Reidy, J Reinertsen, PL Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schalk, T Schumm, BA Schwiening, J Serbo, VV Shapiro, G Sinev, NB Snyder, JA Staengle, H Stahl, A Stamer, P Steiner, H Su, D Suekane, F Sugiyama, A Suzuki, A Swartz, M Taylor, FE Thom, J Torrence, E Usher, T Va'vra, J Verdier, R Wagner, DL Waite, AP Walston, S Weidemann, AW Weiss, ER Whitaker, JS Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Wittlin, JL Woods, M Wright, TR Yamamoto, RK Yashima, J Yellin, SJ Young, CC Yuta, H CA SLD Collaboration TI Measurement of the b-quark fragmentation function in Z(0) decays SO PHYSICAL REVIEW D LA English DT Article ID HEAVY QUARKS; E+E ANNIHILATION; QCD; MESONS; RECONSTRUCTION; PARAMETERS; RESONANCE; DETECTOR; SPECTRA; HADRONS AB We present a measurement of the b-quark inclusive fragmentation function in Z(0) decays using a novel kinematic B-hadron energy reconstruction technique. The measurement was performed using 350 000 hadronic Z(0) events recorded in the SLD experiment at SLAC between 1997 and 1998. The small and stable SLC beam spot and the charge-coupled-device-based vertex detector were used to reconstruct B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measured the B energy with good efficiency and resolution over the full kinematic range. We compared the scaled B-hadron energy distribution with models of b-quark fragmentation and with several ad hoc functional forms. A number of models and functions are excluded by the data. The average scaled energy of weakly decaying B hadrons was measured to be [x(b)] = 0.709+/-0.003(stat)+/-0.003(syst)+/-0.002(model). C1 Tohoku Univ, Sendai, Miyagi 980, Japan. Aomori Univ, Aomori 030, Japan. Univ Bristol, Bristol, Avon, England. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Boston Univ, Boston, MA 02215 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy. Univ Ferrara, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Massachusetts, Amherst, MA 01003 USA. Univ Mississippi, University, MS 38677 USA. MIT, Cambridge, MA 02139 USA. Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 464, Japan. Univ Oregon, Eugene, OR 97403 USA. Univ Oxford, Oxford OX1 3RH, England. Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy. Univ Perugia, I-06100 Perugia, Italy. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Rutgers State Univ, Piscataway, NJ 08855 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Soongsil Univ, Seoul 156743, South Korea. Univ Tennessee, Knoxville, TN 37996 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Washington, Seattle, WA 98105 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Abe, K (reprint author), Tohoku Univ, Sendai, Miyagi 980, Japan. RI de Groot, Nicolo/A-2675-2009; Stahl, Achim/E-8846-2011; de Sangro, Riccardo/J-2901-2012; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; OI Stahl, Achim/0000-0002-8369-7506; de Sangro, Riccardo/0000-0002-3808-5455; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Wilson, Robert/0000-0002-8184-4103 NR 44 TC 73 Z9 73 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 092006 DI 10.1103/PhysRevD.65.092006 PN A PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500016 ER PT J AU Acosta, D Affolder, T Akimoto, H Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Dunietz, I Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Fang, HC Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Ivanov, A Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, K Lee, SW Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, T Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martignon, G Martin, A Martin, V Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Renton, P Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Spezziga, M Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Vaiciulis, T Valls, J Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wagner, W Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Weber, M Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yang, UK Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Akimoto, H Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Dunietz, I Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Fang, HC Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Ivanov, A Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, K Lee, SW Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, T Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martignon, G Martin, A Martin, V Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Renton, P Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Spezziga, M Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Vaiciulis, T Valls, J Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wagner, W Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Weber, M Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yang, UK Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Measurement of B-meson lifetimes using fully reconstructed B decays produced in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICAL REVIEW D LA English DT Article ID CDF; DETECTOR AB We present an improved measurement of b-meson lifetimes using fully reconstructed B-decays produced in p(p) over bar collisions at roots = 1.8 TeV, using 114 pb(-1) of data collected at the Collider Detector at Fermilab. We obtain tau(B+) = 1.636+/-0.058(stat)+/-0.025(syst) ps, tau(B-0) = 1.497+/-0.073(stat)+/-0.032(syst) ps and for the lifetime ratio tau(B+)/tau(B-0) = 1.093+/-0.066(stat)+/-0.028(syst). C1 Univ Florida, Gainesville, FL 32611 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15218 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Illinois, Urbana, IL 61801 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. MIT, Cambridge, MA 02139 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. Univ Trieste Udine, Ist Nazl Fis Nucl, Trieste, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Acosta, D (reprint author), Univ Florida, Gainesville, FL 32611 USA. RI Paulini, Manfred/N-7794-2014; Cabrera Urban, Susana/H-1376-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Scodellaro, Luca/K-9091-2014; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Ruiz, Alberto/E-4473-2011; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Gallas Torreira, Abraham Antonio/K-6508-2014 OI Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Scodellaro, Luca/0000-0002-4974-8330; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Ivanov, Andrew/0000-0002-9270-5643; Gallas Torreira, Abraham Antonio/0000-0002-2745-7954 NR 11 TC 2 Z9 2 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 092009 DI 10.1103/PhysRevD.65.092009 PN A PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500019 ER PT J AU Acosta, D Affolder, T Akimoto, H Albrow, MG Amaral, P Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, YS Ciobanu, CI Clark, AG Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S Done, J D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Fang, HC Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Giannetti, P Giordani, MP Giromini, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Ivanov, A Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, K Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Renton, P Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Vaiciulis, T Valls, J Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F AF Acosta, D Affolder, T Akimoto, H Albrow, MG Amaral, P Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, YS Ciobanu, CI Clark, AG Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S Done, J D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Fang, HC Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Giannetti, P Giordani, MP Giromini, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Ivanov, A Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, K Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Renton, P Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Vaiciulis, T Valls, J Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F CA CDF Collaboration TI Search for single-top-quark production in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICAL REVIEW D LA English DT Article ID W-GLUON FUSION; SILICON VERTEX DETECTOR; FERMILAB-TEVATRON; HADRON COLLIDERS; CROSS-SECTION; PHYSICS; BOSONS; Q(Q)OVER-BAR->T(B)OVER-BAR; QCD AB We search for standard model single-top-quark production in the W-gluon fusion and W-star channels using 106 pb(-1) of data from p(p) over bar collisions at roots = 1.8 TeV collected with the Collider Detector at Fermilab. We set an upper limit at 95% confidence level (C.L.) on the combined W-gluon fusion and W-star single-top cross section of 14 pb, roughly six times larger than the standard model prediction. Separate 95% C.L. upper limits in the W-gluon fusion and W-star channels are also determined and are found to be 13 and 18 pb, respectively. C1 Univ Florida, Gainesville, FL 32611 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Waseda Univ, Tokyo 169, Japan. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Penn, Philadelphia, PA 19104 USA. Univ Michigan, Ann Arbor, MI 48109 USA. MIT, Cambridge, MA 02139 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Rochester, Rochester, NY 14627 USA. Purdue Univ, W Lafayette, IN 47907 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Calif Davis, Davis, CA 95616 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Udine, I-33100 Udine, Italy. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Univ Wisconsin, Madison, WI 53706 USA. Duke Univ, Durham, NC 27708 USA. Brandeis Univ, Waltham, MA 02254 USA. Rockefeller Univ, New York, NY 10021 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Univ Illinois, Urbana, IL 61801 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Geneva, CH-1211 Geneva 4, Switzerland. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Tufts Univ, Medford, MA 02155 USA. Texas A&M Univ, College Stn, TX 77843 USA. Yale Univ, New Haven, CT 06520 USA. High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Osaka City Univ, Osaka 588, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. RP Acosta, D (reprint author), Univ Florida, Gainesville, FL 32611 USA. RI vilar, rocio/P-8480-2014; Cabrera Urban, Susana/H-1376-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Ruiz, Alberto/E-4473-2011; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Gallas Torreira, Abraham Antonio/K-6508-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014 OI Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Ivanov, Andrew/0000-0002-9270-5643; Gallas Torreira, Abraham Antonio/0000-0002-2745-7954; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787 NR 23 TC 46 Z9 46 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 091102 DI 10.1103/PhysRevD.65.091102 PN A PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500002 ER PT J AU Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bokhari, W Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, YS Ciobanu, CI Clark, AG Connolly, A Conway, J Cordelli, M Cranshaw, J Cropp, R Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S Done, J D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Giannetti, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Groer, L Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hoffman, KD Holck, C Hollebeek, R Holloway, L Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, AM Lee, K Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Litvintsev, DO Lobban, O Lockyer, N Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Matthews, JAJ Mayer, J Mazzanti, P McFarland, KS McIntyre, P McKigney, E Menguzzato, M Menzione, A Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Popovic, M Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Robinson, A Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, R Teng, PK Terashi, K Tether, S Thompson, AS Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Turini, N Ukegawa, F Vaiciulis, T Valls, J Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wallace, NB Wan, Z Wang, C Wang, MJ Ward, B Waschke, S Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F Zucchelli, S AF Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bokhari, W Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, YS Ciobanu, CI Clark, AG Connolly, A Conway, J Cordelli, M Cranshaw, J Cropp, R Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S Done, J D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Giannetti, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Groer, L Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hoffman, KD Holck, C Hollebeek, R Holloway, L Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, AM Lee, K Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Litvintsev, DO Lobban, O Lockyer, N Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Matthews, JAJ Mayer, J Mazzanti, P McFarland, KS McIntyre, P McKigney, E Menguzzato, M Menzione, A Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Popovic, M Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Robinson, A Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, R Teng, PK Terashi, K Tether, S Thompson, AS Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Turini, N Ukegawa, F Vaiciulis, T Valls, J Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wallace, NB Wan, Z Wang, C Wang, MJ Ward, B Waschke, S Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Charged jet evolution and the underlying event in proton-antiproton collisions at 1.8 TeV SO PHYSICAL REVIEW D LA English DT Article ID DOUBLE PARTON SCATTERING; (P)OVER-BAR-P COLLISIONS; ROOT-S=1.8 TEV; RADIATION; MODEL AB The growth and development of "charged particle jets" produced in proton-antiproton collisions at 1.8 TeV are studied over a transverse momentum range from 0.5 GeV/c to 50 GeV/c. A variety of leading (highest transverse momentum) charged jet observables are compared with the QCD Monte Carlo models HERWIG, ISAJET, and PYTHIA. The models describe fairly well the multiplicity distribution of charged particles within the leading charged jet, the size of the leading charged jet, the radial distribution of charged particles and transverse momentum around the leading charged jet direction, and the momentum distribution of charged particles within the leading charged jet. The direction of the leading "charged particle jet" in each event is used to define three regions of eta-phi space. The "toward" region contains the leading "charged particle jet," while the "away" region, on the average, contains the away-side jet. The "transverse" region is perpendicular to the plane of the hard 2-to-2 scattering and is very sensitive to the "underlying event" component of the QCD Monte Carlo models. HERWIG, ISAJET, and PYTHIA with their default parameters do not describe correctly all the properties of the "transverse" region. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Waseda Univ, Tokyo 169, Japan. Rockefeller Univ, New York, NY 10021 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Michigan, Ann Arbor, MI 48109 USA. MIT, Cambridge, MA 02139 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Rochester, Rochester, NY 14627 USA. Purdue Univ, W Lafayette, IN 47907 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Calif Davis, Davis, CA 95616 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Trieste Udine, Ist Nazl Fis Nucl, Trieste, Italy. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Univ Wisconsin, Madison, WI 53706 USA. Duke Univ, Durham, NC 27708 USA. Brandeis Univ, Waltham, MA 02254 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Penn, Philadelphia, PA 19104 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Univ Illinois, Urbana, IL 61801 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Geneva, CH-1211 Geneva 4, Switzerland. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. Tufts Univ, Medford, MA 02155 USA. Texas A&M Univ, College Stn, TX 77843 USA. Yale Univ, New Haven, CT 06520 USA. Univ Florida, Gainesville, FL 32611 USA. High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Osaka City Univ, Osaka 588, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. RP Affolder, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI Prokoshin, Fedor/E-2795-2012; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Ruiz, Alberto/E-4473-2011; St.Denis, Richard/C-8997-2012; Gallas Torreira, Abraham Antonio/K-6508-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Cabrera Urban, Susana/H-1376-2015; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Kim, Soo-Bong/B-7061-2014 OI Prokoshin, Fedor/0000-0001-6389-5399; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Ruiz, Alberto/0000-0002-3639-0368; Gallas Torreira, Abraham Antonio/0000-0002-2745-7954; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; NR 13 TC 105 Z9 106 U1 2 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 092002 DI 10.1103/PhysRevD.65.092002 PN A PG 22 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500012 ER PT J AU Allgower, CE Krueger, KW Kasprzyk, TE Spinka, HM Underwood, DG Yokosawa, A Bunce, G Huang, H Makdisi, Y Roser, T Syphers, M Derevschikov, AA Matulenko, YA Nogach, LV Nurushev, SB Vasiliev, AN Bai, M Lee, SY Goto, Y Hayashi, N Ichihara, T Okamura, M Saito, N En'yo, H Imai, K Kondo, Y Nakada, Y Nakamura, M Saito, H Sakai, H Wakasa, T Yako, K Baturine, V Ogawa, A Ghazikhanian, V Igo, G Trentalange, S Whitten, C Belikov, NI Pavlinov, AI AF Allgower, CE Krueger, KW Kasprzyk, TE Spinka, HM Underwood, DG Yokosawa, A Bunce, G Huang, H Makdisi, Y Roser, T Syphers, M Derevschikov, AA Matulenko, YA Nogach, LV Nurushev, SB Vasiliev, AN Bai, M Lee, SY Goto, Y Hayashi, N Ichihara, T Okamura, M Saito, N En'yo, H Imai, K Kondo, Y Nakada, Y Nakamura, M Saito, H Sakai, H Wakasa, T Yako, K Baturine, V Ogawa, A Ghazikhanian, V Igo, G Trentalange, S Whitten, C Belikov, NI Pavlinov, AI CA E925 Collaboration TI Measurement of analyzing powers of pi(+) and pi(-) produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam SO PHYSICAL REVIEW D LA English DT Article ID SINGLE-SPIN ASYMMETRIES; INCLUSIVE HADRON-PRODUCTION; HIGH-ENERGY; PION-PRODUCTION; QUANTUM CHROMODYNAMICS; TRANSVERSE-MOMENTUM; QUARK POLARIZATION; HARD-SCATTERING; 18.5 GEV/C; 200 GEV/C AB The analyzing powers of pi(+) and pi(-) were measured using an incident 22-GeV/c transversely polarized proton beam at the Brookhaven Alternating Gradient Synchrotron. A magnetic spectrometer measured pi(+/-) inclusive asymmetries on a hydrogen and a carbon target. An elastic polarimeter with a CH2 target measured pp elastic-scattering asymmetries to determine the beam polarization using published data for the pp elastic analyzing power. Using the beam polarization determined from the elastic polarimeter and asymmetries from the inclusive spectrometer, analyzing powers A(N) for pi(+/-) were determined in the x(F) and p(T) ranges (0.45-0.8) and (0.3-1.2 GeV/c), respectively. The analyzing power results are similar in both sign and character to other measurements at 200 and 11.7 GeV/c, confirming the expectation that high-energy pion inclusive analyzing powers remain large and relatively energy independent. This suggests that pion inclusive polarimetry may be a suitable method for measuring future beam polarizations at BNL RHIC or DESY HERA. Analyzing powers of pi(+) and pi(-) produced on hydrogen and carbon targets are the same. Various models to explain inclusive analyzing powers are also discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Inst High Energy Phys, Protvino 142284, Russia. Indiana Univ, Cyclotron Facil, Bloomington, IN 47405 USA. Inst Phys & Chem Res, RIKEN, Wako, Saitama 3510198, Japan. Kyoto Univ, Kyoto, Japan. Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan. Penn State Univ, University Pk, PA 16802 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Wayne State Univ, Detroit, MI 48202 USA. PNPI, St Petersburg, Russia. RP Indiana Univ, Cyclotron Facil, Bloomington, IN 47405 USA. RI En'yo, Hideto/B-2440-2015; Sakai, Hideyuki/A-5253-2016 NR 73 TC 65 Z9 65 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 092008 DI 10.1103/PhysRevD.65.092008 PN A PG 24 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500018 ER PT J AU Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Pompili, A Chen, GP Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Clark, AR Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF LeClerc, C Levi, ME Lynch, G Oddone, PJ Perazzo, A Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Bright-Thomas, PG Harrison, TJ Hawkes, CM Knowles, DJ O'Neale, SW Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Kunze, M Lewandowski, B Peters, K Schmuecker, H Steinke, M Andress, JC Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN Dyce, N Foster, B Mackay, C Wallom, D Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D Jolly, S McKemey, AK Blinov, VE Bukin, AD Bukin, DA Buzykaev, AR Golubev, VB Ivanchenko, VN Korol, AA Kravchenko, EA Onuchin, AP Salnikov, AA Serednyakov, SI Skovpen, YI Telnov, VI Yushkov, AN Best, D Chao, M Lankford, AJ Mandelkern, M McMahon, S Stoker, DP Arisaka, K Buchanan, C Chun, S MacFarlane, DB Prell, S Rahatlou, S Raven, G Sharma, V Campagnari, C Dahmes, B Hart, PA Kuznetsova, N Levy, SL Long, O Lu, A Richman, JD Verkerke, W Witherell, M Yellin, S Beringer, J Dorfan, DE Eisner, AM Grillo, AA Grothe, M Heusch, CA Johnson, RP Lockman, WS Pulliam, T Sadrozinski, H Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Metzler, S Oyang, J Porter, FC Ryd, A Samuel, A Weaver, M Yang, S Zhu, RY Devmal, S Geld, TL Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Fahey, S Ford, WT Johnson, DR Nauenberg, U Olivas, A Rankin, P Roy, J Sen, S Smith, JG van Hoek, WC Wagner, DL Blouw, J Harton, JL Krishnamurthy, M Soffer, A Toki, WH Wilson, RJ Zhang, J Aleksan, R de Lesquen, A Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Serfass, B Vasseur, G Yeche, C Zito, M Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Ferrag, S Roussot, E T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Anjomshoaa, A Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Falbo, M Borean, C Bozzi, C Dittongo, S Piemontese, L Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Xie, Y Zallo, A Bagnasco, S Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Pia, MG Robutti, E Santroni, A Tosi, S Morii, M Bartoldus, R Hamilton, R Mallik, U Cochran, J Crawley, HB Fischer, PA Lamsa, J Meyer, WT Rosenberg, EI Grosdidier, G Hast, C Hocker, A Lacker, HM Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Schune, MH Trincaz-Duvoid, S Wormser, G Bionta, RM Brigljevic, V Lange, DJ Mugge, M van Bibber, K Wright, DM Carroll, M Fry, JR Gabathuler, E Gamet, R George, M Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gunawardane, NJW Nash, JA Sanders, P Smith, D Azzopardi, DE Back, JJ Dixon, P Harrison, PF Potter, RJL Shorthouse, HW Strother, P Vidal, PB Williams, MI Cowan, G George, S Green, MG Kurup, A Marker, CE McGrath, P McMahon, TR Ricciardi, S Salvatore, F Scott, I Vaitsas, G Brown, D Davis, CL Allison, J Barlow, RJ Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Simopoulos, ET Weatherall, JH Farbin, A Jawahery, A Lillard, V Olsen, J Roberts, DA Schieck, JR Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VG Moore, TB Staengle, H Willocq, S Brau, B Cowan, R Sciolla, G Taylor, F Yamamoto, RK Milek, M Patel, PM Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Martin, JP Nief, JY Seitz, R Taras, P Zacek, V Nicholson, H Sutton, CS Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C LoSecco, JM Alsmiller, JRG Gabriel, TA Handler, T Brau, J Frey, R Iwasaki, M Sinev, NB Strom, D Colecchia, F Dal Corso, F Dorigo, A Galeazzi, F Margoni, M Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Torassa, E Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O Le Diberder, F Leruste, P Ocariz, J Roos, L Stark, J Versille, S Manfredi, PF Re, V Speziali, V Frank, ED Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Carpinelli, M Forti, F Giorgi, MA Lusiani, A Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Simi, G Triggiani, G Walsh, J Haire, M Judd, D Paick, K Turnbull, L Wagoner, DE Albert, J Elmer, P Lu, C McDonald, KT Miftakov, V Schaffner, SF Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Lamanna, E Leonardi, E Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Xella, SM Copty, N Purohit, MV Singh, H Yumiceva, FX Adam, I Anthony, PL Aston, D Baird, K Berger, N Bloom, E Boyarski, AM Bulos, F Calderini, G Convery, MR Coupal, DP Coward, DH Dorfan, J Dunwoodie, W Field, RC Glanzman, T Godfrey, GL Gowdy, SJ Grosso, P Haas, T Himel, T Hryn'ova, T Huffer, ME Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Moffeit, KC Mount, R Muller, DR O'Grady, CP Ozcan, VE Perl, M Petrak, S Quinn, H Ratcliff, BN Robertson, SH Rochester, LS Roodman, A Schietinger, T Schindler, RH Schwiening, J Serbo, VV Snyder, A Soha, A Spanier, SM Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Cheng, CH Kirkby, D Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Weidemann, AW Izen, JM Kitayama, I Lou, XC Bianchi, F Bona, M Gamba, D Smol, A Bosisio, L Della Ricca, G Lanceri, L Poropat, P Vuagnin, G Panvini, RS Brown, CM Jackson, PD Kowalewski, R Roney, JM Band, HR Charles, E Dasu, S Di Lodovico, F Eichenbaum, AM Hu, H Johnson, JR Liu, R Pan, Y Prepost, R Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Wu, SL Yu, Z Kordich, TMB Neal, H AF Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Pompili, A Chen, GP Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Clark, AR Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF LeClerc, C Levi, ME Lynch, G Oddone, PJ Perazzo, A Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Bright-Thomas, PG Harrison, TJ Hawkes, CM Knowles, DJ O'Neale, SW Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Kunze, M Lewandowski, B Peters, K Schmuecker, H Steinke, M Andress, JC Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN Dyce, N Foster, B Mackay, C Wallom, D Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D Jolly, S McKemey, AK Blinov, VE Bukin, AD Bukin, DA Buzykaev, AR Golubev, VB Ivanchenko, VN Korol, AA Kravchenko, EA Onuchin, AP Salnikov, AA Serednyakov, SI Skovpen, YI Telnov, VI Yushkov, AN Best, D Chao, M Lankford, AJ Mandelkern, M McMahon, S Stoker, DP Arisaka, K Buchanan, C Chun, S MacFarlane, DB Prell, S Rahatlou, S Raven, G Sharma, V Campagnari, C Dahmes, B Hart, PA Kuznetsova, N Levy, SL Long, O Lu, A Richman, JD Verkerke, W Witherell, M Yellin, S Beringer, J Dorfan, DE Eisner, AM Grillo, AA Grothe, M Heusch, CA Johnson, RP Lockman, WS Pulliam, T Sadrozinski, H Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Metzler, S Oyang, J Porter, FC Ryd, A Samuel, A Weaver, M Yang, S Zhu, RY Devmal, S Geld, TL Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Fahey, S Ford, WT Johnson, DR Nauenberg, U Olivas, A Rankin, P Roy, J Sen, S Smith, JG van Hoek, WC Wagner, DL Blouw, J Harton, JL Krishnamurthy, M Soffer, A Toki, WH Wilson, RJ Zhang, J Aleksan, R de Lesquen, A Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Serfass, B Vasseur, G Yeche, C Zito, M Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Ferrag, S Roussot, E T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Anjomshoaa, A Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Falbo, M Borean, C Bozzi, C Dittongo, S Piemontese, L Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Xie, Y Zallo, A Bagnasco, S Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Pia, MG Robutti, E Santroni, A Tosi, S Morii, M Bartoldus, R Hamilton, R Mallik, U Cochran, J Crawley, HB Fischer, PA Lamsa, J Meyer, WT Rosenberg, EI Grosdidier, G Hast, C Hocker, A Lacker, HM Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Schune, MH Trincaz-Duvoid, S Wormser, G Bionta, RM Brigljevic, V Lange, DJ Mugge, M van Bibber, K Wright, DM Carroll, M Fry, JR Gabathuler, E Gamet, R George, M Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gunawardane, NJW Nash, JA Sanders, P Smith, D Azzopardi, DE Back, JJ Dixon, P Harrison, PF Potter, RJL Shorthouse, HW Strother, P Vidal, PB Williams, MI Cowan, G George, S Green, MG Kurup, A Marker, CE McGrath, P McMahon, TR Ricciardi, S Salvatore, F Scott, I Vaitsas, G Brown, D Davis, CL Allison, J Barlow, RJ Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Simopoulos, ET Weatherall, JH Farbin, A Jawahery, A Lillard, V Olsen, J Roberts, DA Schieck, JR Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VG Moore, TB Staengle, H Willocq, S Brau, B Cowan, R Sciolla, G Taylor, F Yamamoto, RK Milek, M Patel, PM Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Martin, JP Nief, JY Seitz, R Taras, P Zacek, V Nicholson, H Sutton, CS Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C LoSecco, JM Alsmiller, JRG Gabriel, TA Handler, T Brau, J Frey, R Iwasaki, M Sinev, NB Strom, D Colecchia, F Dal Corso, F Dorigo, A Galeazzi, F Margoni, M Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Torassa, E Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O Le Diberder, F Leruste, P Ocariz, J Roos, L Stark, J Versille, S Manfredi, PF Re, V Speziali, V Frank, ED Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Carpinelli, M Forti, F Giorgi, MA Lusiani, A Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Simi, G Triggiani, G Walsh, J Haire, M Judd, D Paick, K Turnbull, L Wagoner, DE Albert, J Elmer, P Lu, C McDonald, KT Miftakov, V Schaffner, SF Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Lamanna, E Leonardi, E Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Xella, SM Copty, N Purohit, MV Singh, H Yumiceva, FX Adam, I Anthony, PL Aston, D Baird, K Berger, N Bloom, E Boyarski, AM Bulos, F Calderini, G Convery, MR Coupal, DP Coward, DH Dorfan, J Dunwoodie, W Field, RC Glanzman, T Godfrey, GL Gowdy, SJ Grosso, P Haas, T Himel, T Hryn'ova, T Huffer, ME Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Moffeit, KC Mount, R Muller, DR O'Grady, CP Ozcan, VE Perl, M Petrak, S Quinn, H Ratcliff, BN Robertson, SH Rochester, LS Roodman, A Schietinger, T Schindler, RH Schwiening, J Serbo, VV Snyder, A Soha, A Spanier, SM Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Cheng, CH Kirkby, D Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Weidemann, AW Izen, JM Kitayama, I Lou, XC Bianchi, F Bona, M Gamba, D Smol, A Bosisio, L Della Ricca, G Lanceri, L Poropat, P Vuagnin, G Panvini, RS Brown, CM Jackson, PD Kowalewski, R Roney, JM Band, HR Charles, E Dasu, S Di Lodovico, F Eichenbaum, AM Hu, H Johnson, JR Liu, R Pan, Y Prepost, R Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Wu, SL Yu, Z Kordich, TMB Neal, H CA BABAR Collaboration TI Measurement of D-s(+) and D-s(*+) production in B meson decays and from continuum e(+)e(-) annihilation at root s=10.6 GeV SO PHYSICAL REVIEW D LA English DT Article AB New measurements of D-s(+) and D-s(*+) meson production rates from B decays and from q(q) over bar continuum events near the Y(4S) resonance are presented. Using 20.8 fb(-1) of data on the Y(4S) resonance and 2.6 fb(-1) off-resonance, we find the inclusive branching fractions B(B-->Ds+X) = (10.93+/-0.19+/-0.58+/-2.73)% and B(B-->Ds*+X) = (7.9+/-0.8+/-0.7+/-2.0)%, where the first error is statistical, the second is systematic, and the third is due to the D-s(+)-->phipi(+) branching fraction uncertainty. The production cross sections sigma(e(+)e(-)-->Ds+X)xB(D-s(+)-->phipi(+)) = 7.55+/-0.20+/-0.34 pb and sigma(e(+)e(-)-->Ds*+/-X)xB(D-s(+)-->phipi(+)) = 5.8+/-0.7+/-0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions SigmaB(B-->D-s((*)+)(D) over bar ((*))) = (5.07+/-0.14+/-0.30+/-1.27)% and SigmaB(B-->D-s(*+)(D) over bar ((*))) = (4.1+/-0.2+/-0.4+/-1.0)% are determined from the D-s((*)+) momentum spectra. The mass difference m(D-s(+)) -m(D+) = 98.4+/-0.1+/-0.3 MeV/c(2) is also measured. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. 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Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. RP Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Pia, Maria Grazia/C-7034-2012; Neri, Nicola/G-3991-2012; Torassa, Ezio/I-1788-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; de Sangro, Riccardo/J-2901-2012; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Schaffner, Stephen/D-1189-2011; Frank, Edward/A-8865-2012; Roe, Natalie/A-8798-2012; Bagnasco, Stefano/J-4324-2012; Telnov, Valery/C-6900-2009; Cavallo, Nicola/F-8913-2012; Patrignani, Claudia/C-5223-2009; Monge, Maria Roberta/G-9127-2012; Kravchenko, Evgeniy/F-5457-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lamanna, Ernesto/C-7658-2012; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016 OI Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Pia, Maria Grazia/0000-0002-3579-9639; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; de Sangro, Riccardo/0000-0002-3808-5455; Peters, Klaus/0000-0001-7133-0662; Telnov, Valery/0000-0002-8312-8119; Patrignani, Claudia/0000-0002-5882-1747; Monge, Maria Roberta/0000-0003-1633-3195; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Lamanna, Ernesto/0000-0002-7844-8230; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240 NR 13 TC 15 Z9 15 U1 0 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 091104 DI 10.1103/PhysRevD.65.091104 PN A PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500004 ER PT J AU Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Pompili, A Chen, GP Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Clark, AR Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF LeClerc, C Levi, ME Lynch, G Oddone, PJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Harrison, TJ Hawkes, CM Knowles, DJ O'Neale, SW Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Kunze, M Lewandowski, B Peters, K Schmuecker, H Steinke, M Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN Foster, B Mackay, C Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D Jolly, S McKemey, AK Blinov, VE Bukin, AD Bukin, DA Buzykaev, AR Golubev, VB Ivanchenko, VN Korol, AA Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Telnov, VI Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Mandelkern, M McMahon, S Stoker, DP Arisaka, K Buchanan, C Chun, S MacFarlane, DB Prell, S Rahatlou, S Raven, G Sharma, V Campagnari, C Dahmes, B Hart, PA Kuznetsova, N Levy, SL Long, O Lu, A Richman, JD Verkerke, W Beringer, J Eisner, AM Grothe, M Heusch, CA Lockman, WS Pulliam, T Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Metzler, S Oyang, J Porter, FC Ryd, A Samuel, A Weaver, M Yang, S Zhu, RY Devmal, S Geld, TL Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Blouw, J Harton, JL Krishnamurthy, M Soffer, A Toki, WH Wilson, RJ Zhang, J Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Ferrag, S T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Anjomshoaa, A Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Falbo, M Borean, C Bozzi, C Dittongo, S Piemontese, L Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Xie, Y Zallo, A Bagnasco, S Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Pia, MG Robutti, E Santroni, A Tosi, S Morii, M Bartoldus, R Hamilton, R Mallik, U Cochran, J Crawley, HB Fischer, PA Lamsa, J Meyer, WT Rosenberg, EI Grosdidier, G Hast, C Hocker, A Lacker, HM Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Schune, MH Trincaz-Duvoid, S Wormser, G Bionta, RM Brigljevic, V Lange, DJ Mugge, M van Bibber, K Wright, DM Bevan, AJ Fry, JR Gabathuler, E Gamet, R George, M Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gunawardane, NJW Nash, JA Sanders, P Smith, D Azzopardi, DE Back, JJ Bellodi, G Dixon, P Harrison, PF Potter, RJL Shorthouse, HW Strother, P Vidal, PB Cowan, G George, S Green, MG Kurup, A Marker, CE McGrath, P McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Brown, D Davis, CL Allison, J Barlow, RJ Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Weatherall, JH Williams, JC Farbin, A Jawahery, A Lillard, V Olsen, J Roberts, DA Schieck, JR Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Staengle, H Willocq, S Brau, B Cowan, R Sciolla, G Taylor, F Yamamoto, RK Milek, M Patel, PM Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Nief, JY Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C LoSecco, JM Alsmiller, JRG Gabriel, TA Brau, J Frey, R Grauges, E Iwasaki, M Sinev, NB Strom, D Colecchia, F Dal Corso, F Dorigo, A Galeazzi, F Margoni, M Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Torassa, E Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O Le Diberder, F Leruste, P Ocariz, J Roos, L Stark, J Manfredi, PF Re, V Speziali, V Frank, ED Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Campagna, E Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Simi, G Triggiani, G Walsh, J Haire, M Judd, D Paick, K Turnbull, L Wagoner, DE Albert, J Elmer, P Lu, C Miftakov, V Schaffner, SF Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Lamanna, E Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Serfass, B Vasseur, G Yeche, C Zito, M Purohit, MV Singh, H Weidemann, AW Yumiceva, FX Adam, I Aston, D Berger, N Boyarski, AM Calderini, G Convery, MR Coupal, DP Dong, D Dorfan, J Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Haas, T Himel, T Hryn'ova, T Huffer, ME Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Quinn, H Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schietinger, T Schindler, RH Schwiening, J Snyder, A Soha, A Spanier, SM Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Cheng, CH Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Izen, JM Kitayama, I Lou, XC Bianchi, F Bona, M Gamba, D Bosisio, L Della Ricca, G Lanceri, L Poropat, P Vuagnin, G Panvini, RS Brown, CM Jackson, PD Kowalewski, R Roney, JM Band, HR Charles, E Dasu, S Eichenbaum, AM Hu, H Johnson, JR Liu, R Di Lodovico, F Pan, Y Prepost, R Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Wu, SL Yu, Z Kordich, TMB Neal, H AF Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Pompili, A Chen, GP Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Clark, AR Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF LeClerc, C Levi, ME Lynch, G Oddone, PJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Harrison, TJ Hawkes, CM Knowles, DJ O'Neale, SW Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Kunze, M Lewandowski, B Peters, K Schmuecker, H Steinke, M Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN Foster, B Mackay, C Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D Jolly, S McKemey, AK Blinov, VE Bukin, AD Bukin, DA Buzykaev, AR Golubev, VB Ivanchenko, VN Korol, AA Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Telnov, VI Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Mandelkern, M McMahon, S Stoker, DP Arisaka, K Buchanan, C Chun, S MacFarlane, DB Prell, S Rahatlou, S Raven, G Sharma, V Campagnari, C Dahmes, B Hart, PA Kuznetsova, N Levy, SL Long, O Lu, A Richman, JD Verkerke, W Beringer, J Eisner, AM Grothe, M Heusch, CA Lockman, WS Pulliam, T Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Metzler, S Oyang, J Porter, FC Ryd, A Samuel, A Weaver, M Yang, S Zhu, RY Devmal, S Geld, TL Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Blouw, J Harton, JL Krishnamurthy, M Soffer, A Toki, WH Wilson, RJ Zhang, J Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Ferrag, S T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Anjomshoaa, A Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Falbo, M Borean, C Bozzi, C Dittongo, S Piemontese, L Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Xie, Y Zallo, A Bagnasco, S Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Pia, MG Robutti, E Santroni, A Tosi, S Morii, M Bartoldus, R Hamilton, R Mallik, U Cochran, J Crawley, HB Fischer, PA Lamsa, J Meyer, WT Rosenberg, EI Grosdidier, G Hast, C Hocker, A Lacker, HM Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Schune, MH Trincaz-Duvoid, S Wormser, G Bionta, RM Brigljevic, V Lange, DJ Mugge, M van Bibber, K Wright, DM Bevan, AJ Fry, JR Gabathuler, E Gamet, R George, M Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gunawardane, NJW Nash, JA Sanders, P Smith, D Azzopardi, DE Back, JJ Bellodi, G Dixon, P Harrison, PF Potter, RJL Shorthouse, HW Strother, P Vidal, PB Cowan, G George, S Green, MG Kurup, A Marker, CE McGrath, P McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Brown, D Davis, CL Allison, J Barlow, RJ Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Weatherall, JH Williams, JC Farbin, A Jawahery, A Lillard, V Olsen, J Roberts, DA Schieck, JR Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Staengle, H Willocq, S Brau, B Cowan, R Sciolla, G Taylor, F Yamamoto, RK Milek, M Patel, PM Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Nief, JY Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C LoSecco, JM Alsmiller, JRG Gabriel, TA Brau, J Frey, R Grauges, E Iwasaki, M Sinev, NB Strom, D Colecchia, F Dal Corso, F Dorigo, A Galeazzi, F Margoni, M Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Torassa, E Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O Le Diberder, F Leruste, P Ocariz, J Roos, L Stark, J Manfredi, PF Re, V Speziali, V Frank, ED Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Campagna, E Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Simi, G Triggiani, G Walsh, J Haire, M Judd, D Paick, K Turnbull, L Wagoner, DE Albert, J Elmer, P Lu, C Miftakov, V Schaffner, SF Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Lamanna, E Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Serfass, B Vasseur, G Yeche, C Zito, M Purohit, MV Singh, H Weidemann, AW Yumiceva, FX Adam, I Aston, D Berger, N Boyarski, AM Calderini, G Convery, MR Coupal, DP Dong, D Dorfan, J Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Haas, T Himel, T Hryn'ova, T Huffer, ME Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Quinn, H Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schietinger, T Schindler, RH Schwiening, J Snyder, A Soha, A Spanier, SM Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Cheng, CH Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Izen, JM Kitayama, I Lou, XC Bianchi, F Bona, M Gamba, D Bosisio, L Della Ricca, G Lanceri, L Poropat, P Vuagnin, G Panvini, RS Brown, CM Jackson, PD Kowalewski, R Roney, JM Band, HR Charles, E Dasu, S Eichenbaum, AM Hu, H Johnson, JR Liu, R Di Lodovico, F Pan, Y Prepost, R Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Wu, SL Yu, Z Kordich, TMB Neal, H CA BABAR Collaboration TI Study of B-+/--> J/psi pi(+/-) and B-+/--> J/psi K-+/- decays: Measurement of the ratio of branching fractions and search for direct CP-violating charge asymmetries SO PHYSICAL REVIEW D LA English DT Article AB We have studied the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays using a 20.7 fb(-1) data set collected with the BABAR detector. We observe a signal of 51+/-10 B+/--->J/psipi(+/-) events and determine the ratio B(B+/--->J/psipi(+/-))/B(B+/--->J/psiK(+/-)) to be [3.91+/-0.78(stat)+/-0.19(syst)]%. The CP-violating charge asymmetries for the B+/--->J/psipi(+/-) and B+/--->J/psiK(+/-) decays are determined to be A(pi)=0.01+/-0.22(stat)+/-0.01(syst) and A(K)=0.003+/-0.030(stat)+/-0.004(syst). C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Elon Univ, Elon Univ, NC 27244 USA. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England. Univ London Queen Mary Coll, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Napoh, Italy. Ist Nazl Fis Nucl, I-80126 Napoh, Italy. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Scuola Normale Super Pisa, I-56010 Pisa, Italy. Ist Nazl Fis Nucl, I-56010 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DAPNIA, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. TRIUMF, Vancouver, BC V6T 2A3, Canada. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Telnov, Valery/C-6900-2009; Cavallo, Nicola/F-8913-2012; Roe, Natalie/A-8798-2012; Patrignani, Claudia/C-5223-2009; Monge, Maria Roberta/G-9127-2012; Kravchenko, Evgeniy/F-5457-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lamanna, Ernesto/C-7658-2012; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Schaffner, Stephen/D-1189-2011; Frank, Edward/A-8865-2012; Pia, Maria Grazia/C-7034-2012; Neri, Nicola/G-3991-2012; Torassa, Ezio/I-1788-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; de Sangro, Riccardo/J-2901-2012; Bagnasco, Stefano/J-4324-2012 OI Telnov, Valery/0000-0002-8312-8119; Patrignani, Claudia/0000-0002-5882-1747; Monge, Maria Roberta/0000-0003-1633-3195; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Lamanna, Ernesto/0000-0002-7844-8230; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Peters, Klaus/0000-0001-7133-0662; Pia, Maria Grazia/0000-0002-3579-9639; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; de Sangro, Riccardo/0000-0002-3808-5455; NR 8 TC 7 Z9 7 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 091101 DI 10.1103/PhysRevD.65.091101 PN A PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500001 ER PT J AU Barenboim, G Gorbahn, M Nierste, U Raidal, M AF Barenboim, G Gorbahn, M Nierste, U Raidal, M TI Higgs sector of the minimal left-right symmetric model SO PHYSICAL REVIEW D LA English DT Article ID SPONTANEOUS CP VIOLATION; SPONTANEOUS BREAKDOWN; NEUTRINO MASSES; GAUGE-THEORIES; PARITY; SYSTEM AB We perform an exhaustive analysis of the most general Higgs sector of the minimal left-right symmetric model (MLRM). We find that the CP properties of the vacuum state are connected to the Higgs spectrum: if CP is broken spontaneously, the MLRM does not approach the standard model in the limit of a decoupling left-right symmetry breaking scale. Depending on the size of the CP phases, scenarios with extra nondecoupling flavor-violating doublet Higgs bosons or very light SU(2) triplet Higgs bosons emerge, both of which are ruled out by phenomenology. For zero CP phases the nonstandard Higgs bosons decouple only if a very unnatural fine-tuning condition is satisfied. We also discuss generalizations to the nonminimal Higgs sector. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Tech Univ Munich, Dept Phys, D-85748 Garching, Germany. CERN Theory, CH-1211 Geneva 23, Switzerland. NICPB, EE-10143 Tallinn, Estonia. RP Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. RI Raidal, Martti/A-6796-2008; Raidal, Martti/F-4436-2012 NR 26 TC 33 Z9 33 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 095003 DI 10.1103/PhysRevD.65.095003 PN B PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900032 ER PT J AU Berger, CF Kucs, T Sterman, G AF Berger, CF Kucs, T Sterman, G TI Energy flow in interjet radiation SO PHYSICAL REVIEW D LA English DT Article ID QCD HARD SCATTERING; DIJET RAPIDITY GAPS; JET CROSS-SECTIONS; PERTURBATION-THEORY; ROOT-S=1.8 TEV; HEAVY-QUARK; FACTORIZATION; RESUMMATION; COLLISIONS; COHERENCE AB We study the distribution of transverse energy, Q(Omega), radiated into an arbitrary interjet angular region Omega in high-p(T) two-jet events. Using an approximation that emphasizes radiation directly from the partons that undergo the hard scattering, we find a distribution that can be extrapolated smoothly to Q(Omega)=Lambda(QCD), where it vanishes. This method, which we apply numerically in a valence quark approximation, provides a class of predictions on transverse energy radiated between jets, as a function of jet energy and rapidity, and of the choice of the region Omega in which the energy is measured. We discuss the relation of our approximation to the radiation from unobserved partons of intermediate energy, whose importance was identified by Dasgupta and Salam. C1 SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Berger, CF (reprint author), SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA. NR 41 TC 40 Z9 40 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094031 DI 10.1103/PhysRevD.65.094031 PN B PG 15 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900001 ER PT J AU Chekanov, S Derrick, M Krakauer, D Magill, S Musgrave, B Pellegrino, A Repond, J Yoshida, R Mattingly, MCK Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Cara Romeo, G Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Levi, G Margotti, A Massam, T Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Crittenden, J Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kerger, R Kind, O Paul, E Rautenberg, J Renner, R Schnurbusch, H Stifutkin, A Tandler, J Voss, KC Weber, A Wessoleck, H Bailey, DS Brook, NH Cole, JE Foster, B Heath, GP Heath, HF Robins, S Rodrigues, E Scott, J Tapper, RJ Wing, M Capua, M Mastroberardino, A Schioppa, M Susinno, G Jeoung, HY Kim, JY Lee, JH Lim, IT Ma, KJ Pac, MY Caldwell, A Helbich, M Liu, X Mellado, B Paganis, S Schmidke, WB Sciulli, F Chwastowski, J Eskreys, A Figiel, J Olkiewicz, K Przybycien, MB Stopa, P Zawiejski, L Bednarek, B Grabowska-Bold, I Jelen, K Kisielewska, D Kowal, AM Kowal, M Kowalski, T Mindur, B Przybycien, M Rulikowska-Zarebska, E Suszycki, L Szuba, D Szuba, J Kotanski, A Slominski, W Bauerdick, LAT Behrens, U Borras, K Chiochia, V Dannheim, D Desler, K Drews, G Fourletova, J Fox-Murphy, A Fricke, U Geiser, A Goebel, F Gottlicher, P Graciani, R Haas, T Hain, W Hartner, GF Hillert, S Kotz, U Kowalski, H Labes, H Lelas, D Lohr, B Mankel, R Martens, J Martinez, M Moritz, M Notz, D Petrucci, MC Polini, A Schneekloth, U Selonke, F Stonjek, S Surrow, B Whitmore, JJ Wichmann, R Wolf, G Youngman, C Zeuner, W Coldewey, C Viani, ALD Meyer, A Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Markun, P Raach, H Wolfle, S Bell, M Bussey, PJ Doyle, AT Glasman, C Hanlon, S Lee, SW Lupi, A McCance, GJ Saxon, DH Skillicorn, IO Bodmann, B Holm, U Salehi, H Wick, K Ziegler, A Ziegler, A Carli, T Gialas, I Klimek, K Lohrmann, E Milite, M Collins-Tooth, C Foudas, C Goncalo, R Long, KR Metlica, F Miller, DB Tapper, AD Walker, R Cloth, P Filges, D Kuze, M Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Ahn, SH Lee, SB Park, SK Lim, H Son, D Barreiro, F Garcia, G Gonzalez, O Labarga, L del Peso, J Redondo, I Terron, J Vazquez, M Barbi, M Bertolin, A Corriveau, F Ochs, A Padhi, S Stairs, DG St-Laurent, M Tsurugai, T Antonov, A Bashkirov, V Danilov, P Dolgoshein, BA Gladkov, D Sosnovtsev, V Suchkov, S Dementiev, RK Ermolov, PF Golubkov, YA Katkov, II Khein, LA Korotkova, NA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Solomin, AN Vlasov, NN Zotkin, SA Bokel, C Engelen, J Grijpink, S Koffeman, E Kooijman, P Maddox, E Schagen, S Tassi, E Tiecke, H Tuning, N Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Gilmore, J Ginsburg, CM Kim, CL Ling, TY Boogert, S Cooper-Sarkar, AM Devenish, RCE Ferrando, J Matsushita, T Rigby, M Ruske, O Sutton, MR Walczak, R Brugnera, R Carlin, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Parenti, A Posocco, M Stanco, L Turcato, M Adamczyk, L Oh, BY Saull, PRB Iga, Y D'Agostini, G Marini, G Nigro, A Cormack, C Hart, JC McCubbin, NA Heusch, C Park, IH Pavel, N Abramowicz, H Dagan, S Gabareen, A Kananov, S Kreisel, A Levy, A Abe, T Fusayasu, T Kohno, T Umemori, K Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Cartiglia, N Cirio, R Costa, M Ferrero, MI Maselli, S Monaco, V Peroni, C Ruspa, M Sacchi, R Solano, A Staiano, A Galea, R Koop, T Levman, GM Martin, JF Mirea, A Sabetfakhri, A Butterworth, JM Gwenlan, C Hall-Wilton, R Hayes, ME Heaphy, EA Jones, TW Lane, JB Lightwood, MS West, BJ Ciborowski, J Ciesielski, R Grzelak, G Nowak, RJ Pawlak, JM Smalska, B Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zakrzewski, JA Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Breitweg, J Chapin, D Cross, R Kcira, D Lammers, S Reeder, DD Savin, AA Smith, WH Deshpande, A Dhawan, S Hughes, VW Straub, PB Bhadra, S Catterall, CD Fourletov, S Menary, S Soares, M Standage, J AF Chekanov, S Derrick, M Krakauer, D Magill, S Musgrave, B Pellegrino, A Repond, J Yoshida, R Mattingly, MCK Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Cara Romeo, G Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Levi, G Margotti, A Massam, T Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Crittenden, J Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kerger, R Kind, O Paul, E Rautenberg, J Renner, R Schnurbusch, H Stifutkin, A Tandler, J Voss, KC Weber, A Wessoleck, H Bailey, DS Brook, NH Cole, JE Foster, B Heath, GP Heath, HF Robins, S Rodrigues, E Scott, J Tapper, RJ Wing, M Capua, M Mastroberardino, A Schioppa, M Susinno, G Jeoung, HY Kim, JY Lee, JH Lim, IT Ma, KJ Pac, MY Caldwell, A Helbich, M Liu, X Mellado, B Paganis, S Schmidke, WB Sciulli, F Chwastowski, J Eskreys, A Figiel, J Olkiewicz, K Przybycien, MB Stopa, P Zawiejski, L Bednarek, B Grabowska-Bold, I Jelen, K Kisielewska, D Kowal, AM Kowal, M Kowalski, T Mindur, B Przybycien, M Rulikowska-Zarebska, E Suszycki, L Szuba, D Szuba, J Kotanski, A Slominski, W Bauerdick, LAT Behrens, U Borras, K Chiochia, V Dannheim, D Desler, K Drews, G Fourletova, J Fox-Murphy, A Fricke, U Geiser, A Goebel, F Gottlicher, P Graciani, R Haas, T Hain, W Hartner, GF Hillert, S Kotz, U Kowalski, H Labes, H Lelas, D Lohr, B Mankel, R Martens, J Martinez, M Moritz, M Notz, D Petrucci, MC Polini, A Schneekloth, U Selonke, F Stonjek, S Surrow, B Whitmore, JJ Wichmann, R Wolf, G Youngman, C Zeuner, W Coldewey, C Viani, ALD Meyer, A Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Markun, P Raach, H Wolfle, S Bell, M Bussey, PJ Doyle, AT Glasman, C Hanlon, S Lee, SW Lupi, A McCance, GJ Saxon, DH Skillicorn, IO Bodmann, B Holm, U Salehi, H Wick, K Ziegler, A Ziegler, A Carli, T Gialas, I Klimek, K Lohrmann, E Milite, M Collins-Tooth, C Foudas, C Goncalo, R Long, KR Metlica, F Miller, DB Tapper, AD Walker, R Cloth, P Filges, D Kuze, M Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Ahn, SH Lee, SB Park, SK Lim, H Son, D Barreiro, F Garcia, G Gonzalez, O Labarga, L del Peso, J Redondo, I Terron, J Vazquez, M Barbi, M Bertolin, A Corriveau, F Ochs, A Padhi, S Stairs, DG St-Laurent, M Tsurugai, T Antonov, A Bashkirov, V Danilov, P Dolgoshein, BA Gladkov, D Sosnovtsev, V Suchkov, S Dementiev, RK Ermolov, PF Golubkov, YA Katkov, II Khein, LA Korotkova, NA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Solomin, AN Vlasov, NN Zotkin, SA Bokel, C Engelen, J Grijpink, S Koffeman, E Kooijman, P Maddox, E Schagen, S Tassi, E Tiecke, H Tuning, N Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Gilmore, J Ginsburg, CM Kim, CL Ling, TY Boogert, S Cooper-Sarkar, AM Devenish, RCE Ferrando, J Matsushita, T Rigby, M Ruske, O Sutton, MR Walczak, R Brugnera, R Carlin, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Parenti, A Posocco, M Stanco, L Turcato, M Adamczyk, L Oh, BY Saull, PRB Iga, Y D'Agostini, G Marini, G Nigro, A Cormack, C Hart, JC McCubbin, NA Heusch, C Park, IH Pavel, N Abramowicz, H Dagan, S Gabareen, A Kananov, S Kreisel, A Levy, A Abe, T Fusayasu, T Kohno, T Umemori, K Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Cartiglia, N Cirio, R Costa, M Ferrero, MI Maselli, S Monaco, V Peroni, C Ruspa, M Sacchi, R Solano, A Staiano, A Galea, R Koop, T Levman, GM Martin, JF Mirea, A Sabetfakhri, A Butterworth, JM Gwenlan, C Hall-Wilton, R Hayes, ME Heaphy, EA Jones, TW Lane, JB Lightwood, MS West, BJ Ciborowski, J Ciesielski, R Grzelak, G Nowak, RJ Pawlak, JM Smalska, B Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zakrzewski, JA Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Breitweg, J Chapin, D Cross, R Kcira, D Lammers, S Reeder, DD Savin, AA Smith, WH Deshpande, A Dhawan, S Hughes, VW Straub, PB Bhadra, S Catterall, CD Fourletov, S Menary, S Soares, M Standage, J CA Zeus Collaboration TI Search for lepton-flavor violation in e(+)p collisions at DESY HERA SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC SCATTERING; CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER; OF-MASS ENERGY; CROSS-SECTIONS; EP COLLISIONS; PARTON DISTRIBUTIONS; PARTICLE PHYSICS; GLOBAL ANALYSIS; LEPTOQUARKS AB A search has been made for lepton-flavor-violating interactions of the type e(+)p-->lX, where l denotes a mu or tau with high transverse momentum, at a center-of-mass energy roots of 300 GeV with an integrated luminosity of 47.7 pb(-1) using the ZEUS detector at HERA. No evidence was found for lepton-flavor violation and constraints were derived on leptoquarks (LQs) that could mediate such interactions. For LQ masses below roots, limits are set on lambda(eq1) rootbeta(lq), where lambda(eq1) is the coupling of the LQ to an electron and a first-generation quark q(1) and beta(lq) is the branching ratio of the LQ to l and a quark. For LQ masses exceeding roots, limits are set on the four-fermion contact-interaction term lambda(eqalpha) lambda(lqbeta)/M-LQ(2) for leptoquarks that couple to an electron and a quark q(alpha) and also to l and a quark q(beta). Some of the limits are also applicable to lepton-flavor-violating processes mediated by squarks in R-parity-violating supersymmetric models. In some cases involving heavy quarks and especially for l = tau, the ZEUS limits are the most stringent published to date. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Andrews Univ, Berrien Springs, MI 48104 USA. Univ Bologna, Bologna, Italy. Ist Nazl Fis Nucl, I-40126 Bologna, Italy. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England. Univ Calabria, Dept Phys, I-87036 Cosenza, Italy. Ist Nazl Fis Nucl, Cosenza, Italy. Chonnam Natl Univ, Kwangju, South Korea. Columbia Univ, Nevis Labs, Irvington, NY 10027 USA. Inst Nucl Phys, Krakow, Poland. Stanislaw Staszic Univ Min & Met, Fac Phys & Nucl Tech, PL-30059 Krakow, Poland. Jagiellonian Univ, Dept Phys, Krakow, Poland. DESY, D-2000 Hamburg, Germany. DESY Zeuthen, Zeuthen, Germany. Univ Florence, Florence, Italy. Ist Nazl Fis Nucl, I-50125 Florence, Italy. Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany. Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. Univ Hamburg, Inst Expt Phys 1, Hamburg, Germany. Univ Hamburg, Inst Expt Phys 2, D-2000 Hamburg, Germany. Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England. Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany. Natl Lab High Energy Phys, KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 305, Japan. Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan. Korea Univ, Seoul 136701, South Korea. Kyungpook Natl Univ, Taegu 702701, South Korea. Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan. Moscow Engn Phys Inst, Moscow 115409, Russia. Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia. NIKHEF H, NL-1009 DB Amsterdam, Netherlands. Univ Amsterdam, Amsterdam, Netherlands. Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Univ Oxford, Dept Phys, Oxford, England. Univ Padua, Dipartimento Fis, Padua, Italy. Ist Nazl Fis Nucl, Padua, Italy. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Polytech Univ, Sagamihara, Kanagawa, Japan. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, Rome, Italy. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Seoul Natl Univ, Seoul, South Korea. Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany. Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, IL-69978 Tel Aviv, Israel. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan. Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. UCL, Dept Phys & Astron, London, England. Warsaw Univ, Inst Expt Phys, Warsaw, Poland. Inst Nucl Studies, PL-00681 Warsaw, Poland. Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Yale Univ, Dept Phys, New Haven, CT 06520 USA. York Univ, Dept Phys, N York, ON M3J 1P3, Canada. Jagiellonian Univ, Dept Comp Sci, Krakow, Poland. Univ Aegean, Mitilini, Greece. Univ Piemonte Orientale, Novara, Italy. Univ Lodz, PL-90131 Lodz, Poland. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Tassi, Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011; Solomin, Anatoly/C-3072-2016; Suchkov, Sergey/M-6671-2015; dusini, stefano/J-3686-2012; Goncalo, Ricardo/M-3153-2016; Katz, Uli/E-1925-2013; Wiggers, Leo/B-5218-2015; De Pasquale, Salvatore/B-9165-2008; Wing, Matthew/C-2169-2008; Bashkirov, Vladimir/A-4818-2008; Doyle, Anthony/C-5889-2009; collins-tooth, christopher/A-9201-2012; Ferrando, James/A-9192-2012; Golubkov, Yury/E-1643-2012; Levchenko, B./D-9752-2012; Proskuryakov, Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012 OI Gladilin, Leonid/0000-0001-9422-8636; dusini, stefano/0000-0002-1128-0664; Goncalo, Ricardo/0000-0002-3826-3442; Katz, Uli/0000-0002-7063-4418; Wiggers, Leo/0000-0003-1060-0520; De Pasquale, Salvatore/0000-0001-9236-0748; Doyle, Anthony/0000-0001-6322-6195; Ferrando, James/0000-0002-1007-7816; NR 62 TC 8 Z9 8 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 092004 DI 10.1103/PhysRevD.65.092004 PN A PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500014 ER PT J AU Cheng, HY AF Cheng, HY TI Implications of recent (B)over-bar(0)->(DX0)-X-(*)0 measurements SO PHYSICAL REVIEW D LA English DT Article ID FINAL-STATE INTERACTIONS; HEAVY MESON DECAYS; B-DECAYS; PSEUDOSCALAR MESONS; QCD FACTORIZATION; FORM-FACTORS; CONSTANTS; B->PI-K; PHASES AB The recent measurements of the color-suppressed modes (B) over bar (0)-->D((*)0)pi(0) imply nonvanishing relative final-state interaction (FSI) phases among various (B) over bar -->Dpi decay amplitudes. Depending on whether or not FSIs are implemented in the topological quark-diagram amplitudes, two solutions for the parameters a(1) and a(2) are extracted from data using various form-factor models. It is found that \a(2)(Dpi)\similar to0.35-0.60 and \a(2)(D(*)pi)\similar to0.25-0.50 with a relative phase of order 60degrees between a(1) and a(2). If FSIs are not included in quark-diagram amplitudes from the outset, a(2)(eff)/a(1)(eff) and a(2)(eff) will become smaller. The large value of \a(2)(Dpi)\ compared to \a(2)(eff)(Dpi)\ or naive expectation implies the importance of long-distance FSI contributions to color-suppressed internal W emission via final-state rescatterings of the color-allowed tree amplitude. C1 Acad Sinica, Inst Phys, Taipei 115, Taiwan. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Acad Sinica, Inst Phys, Taipei 115, Taiwan. NR 32 TC 29 Z9 29 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094012 DI 10.1103/PhysRevD.65.094012 PN A PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500049 ER PT J AU Cheng, HY Keum, YY Yang, KC AF Cheng, HY Keum, YY Yang, KC TI B -> J/psi K-* decays in QCD factorization SO PHYSICAL REVIEW D LA English DT Article ID B-MESON DECAYS; TWIST DISTRIBUTION AMPLITUDES; HADRONIC 2-BODY DECAYS; PERTURBATIVE QCD; FORM-FACTORS; VECTOR-MESONS; WEAK DECAYS; QUARK AB The hadronic decay B-->J/psiK(*) is analyzed within the framework of QCD factorization. The spin amplitudes A(0), A(parallel to), and A(perpendicular to) in the transversity basis and their relative phases are studied using various different form-factor models for the B-K-* transition. The effective parameters a(2)(h) for helicity h=0,+,- states receive different nonfactorizable contributions and hence they are helicity-dependent, contrary to naive factorization where a(2)(h) are universal and polarization-independent. QCD factorization breaks down even at the twist-2 level for transverse hard spectator interactions. Although a nontrivial strong phase for the A(parallel to) amplitude can be achieved by adjusting the phase of an infrared-divergent contribution, the present QCD factorization calculation cannot say anything definite about the phase phi(parallel to). Unlike B-->J/psiK decays, the longitudinal parameter a(2)(0) for B-->J/psiK(*) does not receive twist-3 corrections and is not large enough to account for the observed branching ratio and the fraction of the longitudinal polarization. Possible enhancement mechanisms for a(2)(0) are discussed. C1 Acad Sinica, Inst Phys, Taipei 115, Taiwan. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA. Chung Yuan Christian Univ, Dept Phys, Chungli 320, Taiwan. RP Acad Sinica, Inst Phys, Taipei 115, Taiwan. NR 42 TC 30 Z9 30 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094023 DI 10.1103/PhysRevD.65.094023 PN A PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500060 ER PT J AU Harada, J Hashimoto, S Ishikawa, KI Kronfeld, AS Onogi, T Yamada, N AF Harada, J Hashimoto, S Ishikawa, KI Kronfeld, AS Onogi, T Yamada, N TI Application of heavy-quark effective theory to lattice QCD. II. Radiative corrections to heavy-light currents SO PHYSICAL REVIEW D LA English DT Article ID EFFECTIVE FIELD-THEORY; MESON DECAY CONSTANTS; PERTURBATIVE RENORMALIZATION; CONTINUUM-LIMIT; GAUGE-THEORY; REPARAMETRIZATION INVARIANCE; QUANTUM CHROMODYNAMICS; NONRELATIVISTIC QCD; MASSIVE FERMIONS; VECTOR CURRENTS AB We apply heavy-quark effective theory to separate long- and short-distance effects of heavy quarks in lattice gauge theory. In this approach, the inverse heavy-quark mass and the lattice spacing are treated as short distances, and their effects are lumped into short-distance coefficients. We show how to use this formalism to match lattice gauge theory to continuum QCD, order by order in the heavy-quark expansion. In this paper, we focus on heavy-light currents. In particular, we obtain one-loop results for the matching factors of lattice currents, needed for heavy-quark phenomenology, such as the calculation of heavy-light decay constants, and heavy-to-light transition form factors. Results for the Brodsky-Lepage-Mackenzie scale q(*) are also given. C1 Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, Japan. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. Kyoto Univ, Yukawa Inst Theoret Phys, Sakyo Ku, Kyoto 6068502, Japan. RP Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan. NR 72 TC 40 Z9 40 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094513 DI 10.1103/PhysRevD.65.094513 PN B PG 19 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900026 ER PT J AU Harada, J Hashimoto, S Kronfeld, AS Onogi, T AF Harada, J Hashimoto, S Kronfeld, AS Onogi, T TI Application of heavy-quark effective theory to lattice QCD. III. Radiative corrections to heavy-heavy currents SO PHYSICAL REVIEW D LA English DT Article ID EFFECTIVE FIELD-THEORY; PERTURBATIVE RENORMALIZATION; NONRELATIVISTIC QCD; GAUGE-THEORY; MULTIDIMENSIONAL INTEGRATION; REPARAMETRIZATION INVARIANCE; QUANTUM CHROMODYNAMICS; MASSIVE FERMIONS; WILSON FERMIONS; FORM-FACTORS AB We apply heavy-quark effective theory (HQET) to separate long- and short-distance effects of heavy quarks in lattice gauge theory. In this paper we focus on flavor-changing currents that mediate transitions from one heavy flavor to another. We stress differences in the formalism for heavy-light currents, which are discussed in a companion paper, showing how HQET provides a systematic matching procedure. We obtain one-loop results for the matching factors of lattice currents, needed for heavy-quark phenomenology, such as the calculation of zero-recoil form factors for the semileptonic decays B-->D((*))lnu. Results for the Brodsky-Lepage-Mackenzie scale q(*) are also given. C1 Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. Kyoto Univ, Yukawa Inst Theoret Phys, Sakyo Ku, Kyoto 6068502, Japan. RP Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan. NR 64 TC 27 Z9 27 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094514 DI 10.1103/PhysRevD.65.094514 PN B PG 22 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900027 ER PT J AU Harris, BW Owens, JF AF Harris, BW Owens, JF TI Two cutoff phase space slicing method SO PHYSICAL REVIEW D LA English DT Article ID TO-LEADING ORDER; JET CROSS-SECTIONS; HEAVY-QUARK CORRELATIONS; ALPHA-S CALCULATION; ELECTROWEAK RADIATIVE-CORRECTIONS; PROMPT PHOTON PRODUCTION; QCD CORRECTIONS; HADRON COLLIDERS; E+E-ANNIHILATION; E(+)E(-) ANNIHILATION AB The phase space slicing method of two cutoffs for next-to-leading-order Monte Carlo style QCD corrections has been applied to many physics processes. The method is intuitive, simple to implement, and relies on a minimum of process dependent information. Although results for specific applications exist in the literature, there is not a full and detailed description of the method. Herein such a description is provided, along with illustrative examples; details, which have not previously been published, are included so that the method may be applied to additional hard scattering processes. C1 Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA. Robert Morris Univ, Coraopolis, PA 15108 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. RP Argonne Natl Lab, Div High Energy Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM harris@hep.anl.gov; owens@hep.fsu.edu NR 93 TC 213 Z9 213 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094032 DI 10.1103/PhysRevD.65.094032 PN B PG 26 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900002 ER PT J AU Hiller, G Schmaltz, M AF Hiller, G Schmaltz, M TI Strong-weak CP hierarchy from nonrenormalization theorems SO PHYSICAL REVIEW D LA English DT Article ID ELECTRIC-DIPOLE MOMENT; SUPERSYMMETRY-BREAKING; STRONG P; QUANTUM CHROMODYNAMICS; HORIZONTAL SYMMETRIES; QUARK MASSLESS; VIOLATION; NEUTRON; CONSERVATION; CONSTRAINTS AB We point out that the hierarchy between the measured values of the Cabibbo-Kobayashi-Maskawa (CKM) phase and the strong CP phase has a natural origin in supersymmetry with spontaneous CP violation and low-energy supersymmetry breaking. The underlying reason is simple and elegant: in supersymmetry the strong CP phase is protected by an exact nonrenormalization theorem while the CKM phase is not. We present explicit examples of models that exploit this fact and discuss corrections to the nonrenormalization theorem in the presence of supersymmetry breaking. This framework for solving the strong CP problem has generic predictions for the superpartner spectrum and for CP and flavor violation, and predicts a preferred range of values for electric dipole moments. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Boston Univ, Dept Phys, Boston, MA 02215 USA. RP Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM ghiller@slac.stanford.edu; schmaltz@bu.edu NR 65 TC 15 Z9 15 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 096009 DI 10.1103/PhysRevD.65.096009 PN B PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900049 ER PT J AU Jadach, S Placzek, W Skrzypek, M Ward, BFL Was, Z AF Jadach, S Placzek, W Skrzypek, M Ward, BFL Was, Z TI Precision predictions for (un)stable W+W- pair production at and beyond CERN LEP2 energies SO PHYSICAL REVIEW D LA English DT Article ID EXPONENTIATED MONTE-CARLO; RADIATIVE-CORRECTIONS; HELICITY AMPLITUDES; UNSTABLE PARTICLES; E+E ANNIHILATION; GAUGE-INVARIANCE; FERMIONS; RACOONWW; GENERATOR; LOOP AB We present precision calculations of the processes e(+)e(-) --> 4 fermions, in which the double resonant W+W- intermediate state occurs. Referring to this latter intermediate state as the signal process, we show that, by using the YFS Monte Carlo event generators YFSWW3-1.14 and KORALW 1.42 in an appropriate combination, we achieve a physical precision on the signal process, as isolated with CERN LEP2 MC Workshop cuts, below 0.5%. We stress the full gauge invariance of our calculations and we compare our results with those of other authors where appropriate. In particular, sample Monte Carlo data are explicitly illustrated and compared with the results of the program RACOONWW of Denner In this way, we show that the total (physical and technical) precision tag for the WW signal process cross section is 0.4% for 200 GeV, for example. Results are also given for 500 GeV with an eye toward future linear colliders. C1 DESY Zeuthen, Div Theory, D-15738 Zeuthen, Germany. Inst Nucl Phys, PL-30055 Krakow, Poland. CERN, Div Theory, CH-1211 Geneva, Switzerland. Jagiellonian Univ, Inst Comp Sci, PL-30072 Krakow, Poland. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Jadach, S (reprint author), DESY Zeuthen, Div Theory, D-15738 Zeuthen, Germany. NR 55 TC 32 Z9 32 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 093010 DI 10.1103/PhysRevD.65.093010 PN A PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500029 ER PT J AU Jeschonnek, S Van Orden, JW AF Jeschonnek, S Van Orden, JW TI Quark-hadron duality in a relativistic, confining model SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC SCATTERING; BLOOM-GILMAN DUALITY; QCD SUM-RULES; ANOMALOUS DIMENSIONS; RESONANCE PHYSICS; MASS CORRECTIONS; LOCAL DUALITY; ELECTROPRODUCTION; BEHAVIOR; MESONS AB Quark-hadron duality is an interesting and potentially very useful phenomenon, as it relates the properly averaged hadronic data to a perturbative QCD result in some kinematic regimes. While duality is well established experimentally, our current theoretical understanding is still incomplete. We employ a simple model to qualitatively reproduce all the features of the Bloom-Gilman duality as seen in electron scattering. In particular, we address the role of relativity, give an explicit analytic proof of the equality of the hadronic and partonic scaling curves, and show how the transition from coherent to incoherent scattering takes place. C1 Ohio State Univ, Dept Phys, Lima, OH 45804 USA. Jefferson Lab, Newport News, VA 23606 USA. Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. RP Ohio State Univ, Dept Phys, Lima, OH 45804 USA. NR 44 TC 30 Z9 30 U1 1 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094038 DI 10.1103/PhysRevD.65.094038 PN B PG 18 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900008 ER PT J AU Laplace, S Ligeti, Z Nir, Y Perez, G AF Laplace, S Ligeti, Z Nir, Y Perez, G TI Implications of the CP asymmetry in semileptonic B decay SO PHYSICAL REVIEW D LA English DT Article ID MINIMAL FLAVOR VIOLATION; UNITARITY TRIANGLE; QCD CORRECTIONS; STANDARD MODEL; SIN 2-BETA; PHYSICS; SUPERSYMMETRY; DIFFERENCE; SEARCH; SYSTEM AB Recent experimental searches for A(SL), the CP asymmetry in semileptonic B decay, have reached an accuracy of the order of one percent. Consequently, they give meaningful constraints on new physics. We find that cancellations between the standard model (SM) and new physics contributions to B-0-(B) over bar (0) mixing cannot be as strong as was allowed prior to these measurements. The predictions for this asymmetry within the SM and within models of minimal flavor violation (MFV) are below the reach of present and near future measurements. Including order m(c)(2)/m(b)(2) and Lambda(QCD)/m(b) corrections we obtain the SM prediction -1.3x10(-3) to the masses of Goldstone bosons in the CFL phase of QCD with N-f=3 flavors. We find that at densities rhosimilar to(5-10)rho(0), where rho(0) is the density of nuclear matter, the result is dominated by large instantons and subject to considerable uncertainties. We suggest that these uncertainties can be addressed using lattice calculations of the instanton density and the pseudoscalar diquark mass in QCD with two colors. We study the topological susceptibility and Witten-Veneziano type mass relations in both N-c=2 and N-c=3 QCD. C1 Duke Univ, Dept Phys, Durham, NC 27708 USA. SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Riken BNL Res Ctr, Upton, NY 11973 USA. RP Schafer, T (reprint author), Duke Univ, Dept Phys, Durham, NC 27708 USA. OI Schaefer, Thomas/0000-0002-2297-782X NR 49 TC 66 Z9 67 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094033 DI 10.1103/PhysRevD.65.094033 PN B PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900003 ER PT J AU Simonov, YA AF Simonov, YA TI Chiral lagrangian with confinement from the QCD Lagrangian SO PHYSICAL REVIEW D LA English DT Article ID SYMMETRY BREAKING; CONFINING VACUUM; SKYRME TERMS; WILSON LOOP; SIGMA-MODEL; QUARK; FIELD; DYNAMICS; INSTANTONS; EXPANSIONS AB An effective Lagrangian for the light quark in the field of a static source is derived systematically using the exact field correlator expansion. The lowest Gaussian term is bosonized using nonlocal colorless bosonic fields and a general structure of an effective chiral Lagrangian is obtained containing all sets of fields. The new and crucial result is that the condensation of the scalar isoscalar field which is the usual onset of chiral symmetry breaking and is constant in space-time, assumes here the form of the confining string, and contributes to the confining potential, while the remaining bosonic fields describe mesons with the q (q) over bar quark structure and pseudoscalars play the role of Nambu-Goldstone fields. Using a derivative expansion, the effective chiral Lagrangian is deduced containing both confinement and chiral effects for heavy-light mesons. The pseudovector quark coupling constant is computed to be exactly unity in the local limit, in agreement with earlier large N-c arguments. C1 Jefferson Lab, Newport News, VA 23606 USA. Inst Theoret & Expt Phys, State Res Ctr, Moscow 117259, Russia. RP Simonov, YA (reprint author), Jefferson Lab, Newport News, VA 23606 USA. NR 54 TC 49 Z9 51 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094018 DI 10.1103/PhysRevD.65.094018 PN A PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NK UT WOS:000175914500055 ER PT J AU Stephanov, M AF Stephanov, M TI Thermal fluctuations in the interacting pion gas SO PHYSICAL REVIEW D LA English DT Article ID BY-EVENT FLUCTUATIONS; HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; PLUS PB COLLISIONS; CHARGED-PARTICLE RATIO; QUARK-GLUON PLASMA; QCD CRITICAL-POINT; TRANSVERSE-MOMENTUM; PHI-MEASURE; EQUILIBRATION AB We derive the two-particle fluctuation correlator in a thermal gas of pi mesons to the lowest order in an interaction due to a resonance exchange. A diagrammatic technique is used. We discuss how this result can be applied to event-by-event fluctuations in heavy-ion collisions, in particular, to search for the critical point of QCD. As a practical example, we determine the shape of the rapidity correlator. C1 Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Stephanov, M (reprint author), Univ Illinois, Dept Phys, Chicago, IL 60607 USA. NR 42 TC 24 Z9 24 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 096008 DI 10.1103/PhysRevD.65.096008 PN B PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900048 ER PT J AU Suzuki, M AF Suzuki, M TI Helicity conservation and factorization-suppressed charmless B decays SO PHYSICAL REVIEW D LA English DT Article ID QCD FACTORIZATION; PERTURBATIVE QCD; FINAL-STATES; MESON DECAYS; QUARK AB Toward the goal of extracting the weak angle alpha, the decay B-0/(B) over bar (0)-->a(0)(+/-)pi(-/+) was recently measured. The decay B-0-->a(+)pi(-) is not only forbidden in the factorization limit of the tree interaction, but also strongly suppressed for the penguin interaction if short-distance QCD dominates. This makes the extraction of alpha very difficult from a(0)(+/-)pi(-/+). We examine similar factorization-suppressed decays, in particular B-0-->b(1)(+)pi(-). The prospect of obtaining alpha is even less promising with b(1)(+/-)pi(-/+). To probe how well the short-distance dominance works, we emphasize the importance of testing helicity conservation in the charmless B decays with spins. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Suzuki, M (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 18 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 097501 DI 10.1103/PhysRevD.65.097501 PN B PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900059 ER PT J AU Suzuki, M AF Suzuki, M TI Elusive vector glueball SO PHYSICAL REVIEW D LA English DT Article ID RHO-PI-PUZZLE; CHARMONIUM DECAYS; BAG MODEL; GLUONIA; PSI(2S); STATES; J/PSI; WAVE AB If the vector glueball O exists in the mass range that theory suggests, its resonant production cross section can be detected in e(+)e(-) annihilation only if the decay width is very narrow (less than or equal toa few MeV). Otherwise O will be observed only indirectly through its mixing with psi('). We propose a few tests of the O-psi(') mixing for future charm factories. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Suzuki, M (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 18 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 097507 DI 10.1103/PhysRevD.65.097507 PN B PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900065 ER PT J AU Trottier, HD Shakespeare, NH Lepage, GP Mackenzie, PB AF Trottier, HD Shakespeare, NH Lepage, GP Mackenzie, PB CA HPQCD Collaboration TI Perturbative expansions from Monte Carlo simulations at weak coupling: Wilson loops and the static-quark self-energy SO PHYSICAL REVIEW D LA English DT Article ID LATTICE GAUGE-THEORY; MATCHING CONDITIONS; LARGE-BETA; QCD; COMPUTATION; ALPHA(S); MASS AB Perturbative coefficients for Wilson loops and the static-quark self-energy are extracted from Monte Carlo simulations at weak coupling. The lattice volumes and couplings are chosen to ensure that the lattice momenta are all perturbative. Twisted boundary conditions are used to eliminate the effects of lattice zero modes and to suppress nonperturbative finite-volume effects due to Z(3) phases. Simulations of the Wilson gluon action are done with both periodic and twisted boundary conditions, and over a wide range of lattice volumes (from 3(4) to 16(4)) and couplings (from betaapproximate to9 to betaapproximate to60). A high precision comparison is made between the simulation data and results from finite-volume lattice perturbation theory. The Monte Carlo results are shown to be in excellent agreement with perturbation theory through second order. New results for third-order coefficients for a number of Wilson loops and the static-quark self-energy are reported. C1 Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada. Cornell Univ, Newman Lab Nucl Studies, Ithaca, NY 14853 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Trottier, HD (reprint author), Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada. NR 29 TC 31 Z9 31 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 094502 DI 10.1103/PhysRevD.65.094502 PN B PG 15 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900015 ER PT J AU Zhang, R Ding, YB Li, XQ Page, PR AF Zhang, R Ding, YB Li, XQ Page, PR TI Molecular states and 1(-+) exotic mesons SO PHYSICAL REVIEW D LA English DT Article ID 18 GEV/C; QUARK MODELS; SPECTROSCOPY; ANNIHILATION; SYSTEM; REST; WAVE; QCD AB This work investigates whether the observed 1(-+) exotic mesons are molecular states. We first use a potential model to calculate the spectra and lifetimes of the f(0)(980) and a(0)(980), taken to be loosely bound molecular states of K (K) over bar, then apply the same scenario to the 1(-+) exotic states pi(1)(1400) and pi(1)(1600), assuming them to be pieta(1295) and pieta(1440) molecules, respectively. We derive the effective potential in the framework of field theory at the hadronic level. Our results indicate that the present data on pi(1)(1400) and pi(1)(1600) rule out the specific molecular ansatz. We show that the lifetime of a loosely bound heavy-light molecule with enough angular momentum is fully determined by the lifetimes of its constituent mesons. C1 CCAST, World Lab, Beijing 100080, Peoples R China. Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA. Acad Sinica, Grad Sch, Dept Phys, Beijing 100039, Peoples R China. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Theoret & Computat Phys Sect, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China. RI Zhang, Rui/E-3154-2010; Page, Philip/L-1885-2015 OI Page, Philip/0000-0002-2201-6703 NR 44 TC 11 Z9 11 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY 1 PY 2002 VL 65 IS 9 AR 096005 DI 10.1103/PhysRevD.65.096005 PN B PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 557NP UT WOS:000175914900045 ER PT J AU Achterhold, K Keppler, C Ostermann, A van Burck, U Sturhahn, W Alp, EE Parak, FG AF Achterhold, K Keppler, C Ostermann, A van Burck, U Sturhahn, W Alp, EE Parak, FG TI Vibrational dynamics of myoglobin determined by the phonon-assisted Mossbauer effect SO PHYSICAL REVIEW E LA English DT Article ID NUCLEAR RESONANT SCATTERING; INELASTIC NEUTRON-SCATTERING; PROTEIN HYDRATION WATER; SYNCHROTRON-RADIATION; CARBONMONOXY-MYOGLOBIN; LIGAND-BINDING; BOSON PEAK; TEMPERATURE-DEPENDENCE; GLOBULAR PROTEIN; RAMAN-SPECTRA AB The phonon-assisted Mossbauer effect is used to determine the partial phonon density of states of the iron within the active center of deoxymyoglobin, carboxymyoglobin, and dry and wet metmyoglobin between 40 and 300 K. Between 0 and 1 meV the iron density of states increases quadratically with the energy, as in a Debye solid. Mean sound velocities are extracted from this slope. Between 1 and 3 meV a nearly quadratic "Debye-like" increase follows due to the similar strength of intermolecular and intramolecular forces. Above 3 meV, optical vibrations are, characteristic for the iron-ligand conformation. The overall mean square displacements of the heme iron atom obtained from the density of states agree well with the values of Mossbauer absorption experiments below 180 K. In the physiological temperature regime the data confirm the existence of harmonic vibrations in addition to the Protein specific dynamics measured by Mossbauer absorption. In the Debye energy regime the mean square displacement of the iron is in agreement with that of the hydrogens measured by. incoherent neutron scattering demonstrating the global character of these modes. At higher energies the vibration of the heavy iron atom at 33 meV in metmyoglobin is as large as that of the lightweight hydrogens at that energy. A freeze dried, rehydrated (h = 0.38 g H2O/g protein) metmyoglobin sample shows an excess of states above the Debye law between 1 and 3 meV, similar to neutron scattering experiments. The room temperature density of states below 3 meV exhibit an increase of the density compared to the low temperature data, which can be interpreted as mode softening. C1 Tech Univ Munich, Dept Phys E17, D-85747 Garching, Germany. Tech Univ Munich, Dept Phys E13, D-85747 Garching, Germany. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Tech Univ Munich, Dept Phys E17, D-85747 Garching, Germany. OI Ostermann, Andreas/0000-0002-1477-5590 NR 74 TC 55 Z9 55 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 051916 DI 10.1103/PhysRevE.65.051916 PN 1 PG 13 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PX UT WOS:000176552300093 PM 12059602 ER PT J AU Albright, BJ Lemons, DS Jones, ME Winske, D AF Albright, BJ Lemons, DS Jones, ME Winske, D TI Quiet direct simulation of Eulerian fluids SO PHYSICAL REVIEW E LA English DT Article ID FLOWS AB The direct simulation Monte Carlo method of modeling fluids requires sampling one or more random variables every time step for each, particle. In this paper a "quiet Monte Carlo" technique is proposed that eliminates the random sampling And the noise. it produces by deterministically generating a small number of computational particles. The technique is applied to particle equations of motion appropriate for modeling an Eulerian fluid. Results indicate that strong one- and two-dimensional shocks with large dynamic ranges are accurately represented with only a few particles per cell. C1 Los Alamos Natl Lab, Div Appl Phys, Plasma Phys Grp MS B259, Los Alamos, NM 87545 USA. RP Albright, BJ (reprint author), Los Alamos Natl Lab, Div Appl Phys, Plasma Phys Grp MS B259, POB 1663, Los Alamos, NM 87545 USA. NR 21 TC 9 Z9 10 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 055302 DI 10.1103/PhysRevE.65.055302 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500014 PM 12059638 ER PT J AU Chen, H Beiersdorfer, P Fournier, KB Trabert, E AF Chen, H Beiersdorfer, P Fournier, KB Trabert, E TI Soft-x-ray spectra of highly charged Kr ions in an electron beam ion trap SO PHYSICAL REVIEW E LA English DT Article ID LOW-DENSITY PLASMA; KRYPTON; SPECTROMETER; SPECTROSCOPY; ITER AB Systematic variation of the electron-beam energy in the EBIT-II electron beam ion trap has been employed to produce soft-x-ray spectra (26-75 Angstrom) of Kr with well-defined maximum charge states ranging from Cu- to Al-like ions. Guided by large-scale relativistic atomic structure calculations, the strongest lines have been identified with Deltan = 1 (n= 3 to n'=4) transitions from Ni- to P-like ions (Kr(8+)-Kr(21+)), as well as a number of 3p-4d and 3d-5f transitions. C1 Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94550 USA. Univ Liege, IPNAS, B-4000 Liege, Belgium. Ruhr Univ Bochum, Fak Phys & Astron, D-44780 Bochum, Germany. RP Chen, H (reprint author), Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94550 USA. NR 39 TC 10 Z9 11 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056401 DI 10.1103/PhysRevE.65.056401 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500085 PM 12059709 ER PT J AU de Carvalho, CAA Cavalcanti, RM Fraga, ES Joras, SE AF de Carvalho, CAA Cavalcanti, RM Fraga, ES Joras, SE TI Improved semiclassical density matrix: Taming caustics SO PHYSICAL REVIEW E LA English DT Article ID FINITE-TEMPERATURE; POTENTIAL BARRIER; STATE; TOP AB We present simple method to deal with caustics in the semiclassical approximation to-the thermal density matrix of a particle moving on the line. For simplicity, only its diagonal elements are considered. The only ingredient we require is the knowledge of the extrema of the Euclidean action. The procedure makes use of complex trajectories, and is applied to the quartic double-well potential. C1 Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil. Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil. Brookhaven Natl Lab, Dept Phys, Nucl Theory Grp, Upton, NY 11973 USA. Brown Univ, Dept Phys, High Energy Theory Grp, Providence, RI 02912 USA. RP de Carvalho, CAA (reprint author), Univ Fed Rio de Janeiro, Inst Fis, Caixa Postal 68528, BR-21945970 Rio De Janeiro, Brazil. EM aragao@if.ufrj.br; nnoritz@if.ufrj.br; fraga@th.u-psud.fr; joras@if.ufrj.br RI Joras, Sergio/M-9230-2014; Fraga, Eduardo/H-6010-2016 OI Fraga, Eduardo/0000-0001-5340-156X NR 31 TC 7 Z9 7 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056112 DI 10.1103/PhysRevE.65.056112 PN 2 PG 9 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500028 PM 12059652 ER PT J AU Dellago, C Hoover, WG Posch, HA AF Dellago, C Hoover, WG Posch, HA TI Fluctuations, convergence times, correlation functions, and power laws from many-body Lyapunov spectra for soft and hard disks and spheres SO PHYSICAL REVIEW E LA English DT Article ID SYSTEMS; INSTABILITY; EQUILIBRIUM; MODES AB The dynamical instability of many-body systems is best characterized through the time-dependent local Lyapunov spectrum {lambda(j)}, its associated comoving eigenvectors {delta(j)}, and the "global" time-averaged spectrum {[lambda(j)]}. We study the fluctuations of the local spectra as well as the convergence rates and correlation functions associated with the delta vectors as functions of j and system size N. All the number dependences can be described by simple power laws. The various powers depend on the thermodynamic state and force law as well as system dimensionality. C1 Univ Rochester, Dept Chem, Rochester, NY 14627 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria. RP Dellago, C (reprint author), Univ Rochester, Dept Chem, Rochester, NY 14627 USA. RI Dellago, Christoph/E-1625-2011 NR 21 TC 8 Z9 8 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056216 DI 10.1103/PhysRevE.65.056216 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500065 PM 12059689 ER PT J AU Esarey, E Shadwick, BA Catravas, P Leemans, WP AF Esarey, E Shadwick, BA Catravas, P Leemans, WP TI Synchrotron radiation from electron beams in plasma-focusing channels SO PHYSICAL REVIEW E LA English DT Article ID HOSE INSTABILITY; THOMSON SCATTERING; LASER; REGIME; ACCELERATOR; SIMULATION AB Spontaneous radiation emitted from relativistic electrons undergoing betatron motion in a plasma-focusing channel is analyzed, and applications to plasma wake-field accelerator experiments and to the ion-channel laser (ICL) are discussed. Important, similarities and differences between a free electron laser (FEL) and an ICL are delineated. It is shown that the frequency of spontaneous radiation is a strong function of the betatron strength parameter a(beta), which plays a role similar to that of the wiggler strength parameter in a conventional FEL. For a(beta)greater than or similar to1, radiation is emitted in numerous harmonics. Furthermore, a(beta) is proportional to the amplitude of the betatron orbit, which varies for every electron in the beam. The radiation spectrum emitted from an electron beam is calculated by averaging the single-electron spectrum over the electron distribution. This leads to a frequency broadening of the radiation spectrum, which places serious limits on the possibility of realizing an ICL. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA. RP Esarey, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA. NR 42 TC 173 Z9 175 U1 5 U2 26 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056505 DI 10.1103/PhysRevE.65.056505 PN 2 PG 15 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500099 PM 12059723 ER PT J AU Martins, JSS Rundle, JB Anghel, M Klein, W AF Martins, JSS Rundle, JB Anghel, M Klein, W TI Precursory dynamics in threshold systems SO PHYSICAL REVIEW E LA English DT Article ID HETEROGENEOUS FAULTS; GUTENBERG-RICHTER; MODELS; EARTHQUAKES; AVALANCHES; GROWTH AB A precursory dynamics, motivated by the analysis of recent experiments on solid-on-solid friction, is introduced in a continuous cellular automaton that mimics the physics of earthquake source processes. The resulting system of equations for the interevent cycle can be decoupled and yields an analytical solution in the mean-field limit, exhibiting a smoothing effect of the dynamics on the stress field. Simulation results show the resulting departure from scaling at the large-event end of the frequency distribution, and support claims that the field leakage may parametrize the superposition of scaling and characteristic regimes observed in real earthquake faults. C1 Univ Colorado, Colorado Ctr Chaos & Complex, CIRES, Boulder, CO 80309 USA. Univ Colorado, Dept Phys, Boulder, CO 80309 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Boston Univ, Dept Phys, Boston, MA 02215 USA. Boston Univ, Ctr Computat Sci, Boston, MA 02215 USA. RP Martins, JSS (reprint author), Univ Colorado, Colorado Ctr Chaos & Complex, CIRES, CB 216, Boulder, CO 80309 USA. RI Martins, Jorge/F-7780-2012 NR 18 TC 1 Z9 1 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056117 DI 10.1103/PhysRevE.65.056117 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500033 ER PT J AU Scalerandi, M Sansone, BC Benati, C Condat, CA AF Scalerandi, M Sansone, BC Benati, C Condat, CA TI Competition effects in the dynamics of tumor cords SO PHYSICAL REVIEW E LA English DT Article ID MULTICELL SPHEROIDS; GROWTH; MODEL; MORPHOLOGY; KINETICS; ANGIOGENESIS; CARCINOMAS; DIFFUSION; SUBSTRATE; MOTION AB A general feature of cancer growth is the cellular competition for available nutrients. This is also the case for tumor cords, neoplasms forming cylindrical structures around blood vessels. Experimental data show that, in their avascular phase, cords grow up to a limit radius of about 100 mum, reaching a quasi - steady-state characterized by a necrotized area separating the tumor from the surrounding healthy tissue. Here we use a set of rules to formulate a model that describes how the dynamics of cord growth is controlled by the competition of tumor cells among themselves and with healthy cells for the acquisition of essential nutrients. The model takes into account the mechanical effects resulting from the interaction between the multiplying cancer cells and the surrounding tissue. We explore the influence of the relevant parameters on the tumor growth and on its final state. The model is also applied to investigate cord deformation in a region containing multiple nutrient sources and to predict the further complex growth of the tumor. C1 Politecn Torino, Dipartimento Fis, INFM, I-10129 Turin, Italy. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Nacl Cordoba, FaMAF, Cordoba, Argentina. Univ Puerto Rico, Dept Phys, Mayaguez, PR 00680 USA. RP Politecn Torino, Dipartimento Fis, INFM, Corso Duca Abruzzi 24, I-10129 Turin, Italy. OI SCALERANDI, MARCO/0000-0003-0809-9976 NR 36 TC 13 Z9 13 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 051918 DI 10.1103/PhysRevE.65.051918 PN 1 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PX UT WOS:000176552300095 PM 12059604 ER PT J AU Silbert, LE Ertas, D Grest, GS Halsey, TC Levine, D AF Silbert, LE Ertas, D Grest, GS Halsey, TC Levine, D TI Analogies between granular jamming and the liquid-glass transition SO PHYSICAL REVIEW E LA English DT Article ID FORCE DISTRIBUTIONS; FLOWS; ASSEMBLIES AB Based on large-scale, three-dimensional chute flow simulations of granular systems, we uncover strong analogies between the jamming of the grains and the liquid-lass transition. The angle of inclination theta in the former transition appears as an analog of temperature T in the latter. The transition is manifested in the development of a plateau in the contact normal force distribution P(f) at small forces, the splitting of the second peak in the pair-correlation function g(r), and increased fluctuations of the system energy. The static state also exhibits history dependence, akin to the quench-rate dependence of structural properties of glasses, due to the hyperstaticity of the contact network. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. ExxonMobil Res & Engn, Corp Strateg Res, Annandale, NJ 08801 USA. Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel. RP Silbert, LE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 24 TC 55 Z9 55 U1 3 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 051307 DI 10.1103/PhysRevE.65.051307 PN 1 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PX UT WOS:000176552300042 PM 12059551 ER PT J AU Steier, C Robin, D Nadolski, L Decking, W Wu, Y Laskar, J AF Steier, C Robin, D Nadolski, L Decking, W Wu, Y Laskar, J TI Measuring and optimizing the momentum aperture in a particle accelerator SO PHYSICAL REVIEW E LA English DT Article ID ADVANCED LIGHT-SOURCE; GLOBAL DYNAMICS; FREQUENCY-ANALYSIS; STORAGE-RINGS; SYSTEMS AB Particle motion in storage rings is confined by various aperture limits, the size of which restricts the performance of the ring in terms of injection efficiency, lifetime, etc. Intrabeam scattering makes particles sweep a large portion of the phase space, where their motion may eventually be resonantly or chaotically excited to large amplitudes leading to collision with the vacuum chamber. We report here the studies performed at the Advanced Light Source (ALS) on the on- and off-momentum particle motion that provides a good understanding of these limitations. Using off-momentum simulations and experiments together with frequency map analysis, we could precisely correlate beam loss areas with resonance locations. The very good agreement between simulations and experiments allowed us to provide guidance for avoiding these dangerous areas. This analysis results in predictive improvements of the momentum aperture, which actually led to a lifetime increase of 25% at the ALS for very high bunch charge. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. CNRS, IMC, F-75014 Paris, France. DESY, D-22603 Hamburg, Germany. Duke Univ, Durham, NC 27708 USA. RP Steier, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI Laskar, Jacques/E-1098-2011 OI Laskar, Jacques/0000-0003-2634-789X NR 36 TC 28 Z9 28 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056506 DI 10.1103/PhysRevE.65.056506 PN 2 PG 17 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500100 PM 12059724 ER PT J AU Zhou, Y Zimmerman, GB Burke, EW AF Zhou, Y Zimmerman, GB Burke, EW TI Formulation of a two-scale transport scheme for the turbulent mix induced by Rayleigh-Taylor and Richtmyer-Meshkov instabilities SO PHYSICAL REVIEW E LA English DT Article ID DEPENDENCE; DRIVEN; MODEL AB We develop a two-scale transport model for the turbulent mix induced by Rayleigh-Taylor and Richtmyer-Meshkov instabilities. We generalize the buoyancy-drag model by adding an energy equation for a more complete description of the generated interpenetration between heavy and light fluids. The generalized buoyancy-drag model, in turn, Provides an appropriate source to the two-equation turbulence model, which is most suited for the induced turbulent flows. The two-scale transport model. has been validated and several illustrative examples will be presented. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Zhou, Y (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 31 TC 13 Z9 13 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAY PY 2002 VL 65 IS 5 AR 056303 DI 10.1103/PhysRevE.65.056303 PN 2 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 568PZ UT WOS:000176552500075 PM 12059699 ER PT J AU Holtzapple, R Billing, M AF Holtzapple, R Billing, M TI Measurements of bunch motion due to the longitudinal dipole-coupled bunch instability at the Cornell Electron-Positron Storage Ring SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB In the past, a longitudinal dipole-coupled bunch instability had limited high current operation at the Cornell Electron-Positron Storage Ring (CESR) and resulted in a degradation of luminosity performance. A longitudinal feedback system successfully damps this instability, and the exchange of superconducting rf cavities for normal conducting rf cavities in CESR has further reduced the instability's strength. A description of the longitudinal dynamics with the instability present are described in this paper along with detailed measurements of the instability using a dual-axis synchroscan streak camera. The measurements were made on single trains of bunches, multiple trains, and colliding beams. These measurements give a characterization of the instability's degradation of luminosity, modes of oscillation, and bunch distribution changes. C1 Cornell Univ, Nucl Studies Lab, Ithaca, NY 14853 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Holtzapple, R (reprint author), Cornell Univ, Nucl Studies Lab, Ithaca, NY 14853 USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAY PY 2002 VL 5 IS 5 AR 054401 DI 10.1103/PhysRevSTAB.5.054401 PG 19 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 581ZE UT WOS:000177324600004 ER PT J AU Reitsma, AJW Leemans, WP Esarey, E Schroeder, CB Kamp, LPJ Schep, TJ AF Reitsma, AJW Leemans, WP Esarey, E Schroeder, CB Kamp, LPJ Schep, TJ TI Simulation of electron postacceleration in a two-stage laser wakefield accelerator SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID WAKE-FIELD ACCELERATION; PLASMA-WAVES; PULSES; BEAM; CHANNELS; RAMAN; GENERATION; SCATTERING; DYNAMICS; BREAKING AB Electron bunches produced in self-modulated laser wakefield experiments usually have a broad energy distribution, with most electrons at low energy (1-3 MeV) and only a small fraction at high energy. We propose and investigate further acceleration of such bunches in a channel-guided resonant laser wakefield accelerator. Two-dimensional simulations with and without the effects of self-consistent beam loading are performed and compared. These results indicate that it is possible to trap about 40% of the injected bunch charge and accelerate this fraction to an average energy of about 50 MeV in a plasma channel of a few mm. C1 Tech Univ Eindhoven, NL-5600 MB Eindhoven, Netherlands. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Reitsma, AJW (reprint author), Tech Univ Eindhoven, POB 513, NL-5600 MB Eindhoven, Netherlands. OI Kamp, Leon/0000-0003-0626-3832; Schroeder, Carl/0000-0002-9610-0166 NR 38 TC 11 Z9 11 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAY PY 2002 VL 5 IS 5 AR 051301 DI 10.1103/PhysRevSTAB.5.051301 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 581ZE UT WOS:000177324600001 ER PT J AU Stupakov, G Heifets, S AF Stupakov, G Heifets, S TI Beam instability and microbunching due to coherent synchrotron radiation SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB A relativistic electron beam moving in a circular orbit in free space can radiate coherently if the wavelength of the synchrotron radiation exceeds the length of the bunch. In accelerators coherent synchrotron radiation of the bunch is usually suppressed by the shielding effect of the conducting walls of the vacuum chamber. However an initial density fluctuation with a characteristic length much shorter than the bunch length can radiate coherently. If the radiation reaction force results in the growth of the initial fluctuation, one can expect an instability which leads to microbunching of the beam and an increased coherent radiation at short wavelengths. Such an instability is studied theoretically in this paper. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stupakov, G (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 16 TC 63 Z9 64 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAY PY 2002 VL 5 IS 5 AR 054402 DI 10.1103/PhysRevSTAB.5.054402 PG 4 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 581ZE UT WOS:000177324600005 ER PT J AU Venturini, M AF Venturini, M TI Stability analysis of longitudinal beam dynamics using noncanonical Hamiltonian methods and energy principles SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID WAVES AB In the presence of rf focusing and a purely inductive impedance bunch, equilibria in the form of Haissinski distributions-when they exist-are linearly stable. This is the case whether the potential well distortion associated with the impedance causes bunch lengthening or shortening. We provide a general proof of this fact using Hamiltonian methods and energy principles. In the presence of bunch shortening our analysis indicates that there is a critical current for linear stability. However, this threshold is identical to the critical current defining the condition for the very existence of a Haissinski equilibrium. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Venturini, M (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM venturin@slac.stanford.edu NR 18 TC 7 Z9 7 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAY PY 2002 VL 5 IS 5 AR 054403 DI 10.1103/PhysRevSTAB.5.054403 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 581ZE UT WOS:000177324600006 ER PT J AU Friedman, M Strauss, M Amendt, P London, RA Glinsky, ME AF Friedman, M Strauss, M Amendt, P London, RA Glinsky, ME TI Two-dimensional Rayleigh model for bubble evolution in soft tissue SO PHYSICS OF FLUIDS LA English DT Article ID PULSED-LASER ABLATION; OPTICAL-BREAKDOWN; CAVITATION; THROMBOLYSIS; GENERATION; MECHANISMS; PICOSECOND; TRANSIENT; COLLAPSE; BOUNDARY AB The understanding of vapor bubble generation in a soft tissue near a fiber-optic tip has in the past required two-dimensional (2D) hydrodynamic simulations. For 1D spherical bubble expansions a simplified and useful Rayleigh-type model can be applied. For 2D bubble evolution, such a model has not been developed. In this work we develop a Rayleigh-type model for 2D bubble expansion that is much faster and simpler than 2D hydrodynamic simulations and can be applied toward the design and understanding of fiber-based medical therapies. The model is based on a flow potential representation of the hydrodynamic motion and is described by a Laplace equation with a moving boundary condition at the bubble surface. In order for the Rayleigh-type 2D model to approximate bubble evolution in soft tissue, we include viscosity and surface tension in the fluid description. We show that the 1D Rayleigh equation is a special case of our model. The Laplace equation is solved for each time step by a finite-element solver using a fast triangular unstructured mesh generator. Our simulations include features of bubble evolution as seen in experiments and are in good agreement with 2D hydrodynamic simulations. (C) 2002 American Institute of Physics. C1 Nucl Res Ctr Negev, IL-84190 Beer Sheva, Israel. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. BHP Petr, Houston, TX 77056 USA. RP Friedman, M (reprint author), Nucl Res Ctr Negev, POB 9001, IL-84190 Beer Sheva, Israel. RI Kipke, Daryl/A-2167-2009 NR 41 TC 7 Z9 7 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD MAY PY 2002 VL 14 IS 5 BP 1768 EP 1780 DI 10.1063/1.1467654 PG 13 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 540PY UT WOS:000174938400022 ER PT J AU Wang, Z Pariev, VI Barnes, CW Barnes, DC AF Wang, Z Pariev, VI Barnes, CW Barnes, DC TI Laminar plasma dynamos SO PHYSICS OF PLASMAS LA English DT Article ID SPHEROMAK; FLOW AB A new kind of dynamo utilizing flowing laboratory plasmas has been identified. The conversion of plasma kinetic energy to magnetic energy is verified numerically by kinematic dynamo simulations for magnetic Reynolds numbers above 210. As opposed to intrinsically-turbulent liquid-sodium dynamos, the proposed plasma dynamo corresponds to laminar flow topology. Modest plasma parameters (1-20 eV temperatures, 10(19)-10(20) m(-3) densities in 0.3-1.0 m scale-lengths driven by velocities on the order of the Alfven critical ionization velocity) self-consistently satisfy the conditions needed for the magnetic field amplication. Growth rates for plasma dynamos are obtained numerically with different geometry and magnetic Reynolds numbers. Magnetic-field-free coaxial plasma guns can be used to sustain the plasma flow and the dynamo. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA. PN Lebedev Phys Inst, Moscow 117924, Russia. RP Wang, Z (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 24 TC 7 Z9 8 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1491 EP 1494 DI 10.1063/1.1467058 PN 1 PG 4 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300001 ER PT J AU Lapenta, G Brackbill, JU AF Lapenta, G Brackbill, JU TI Nonlinear evolution of the lower hybrid drift instability: Current sheet thinning and kinking SO PHYSICS OF PLASMAS LA English DT Article ID KELVIN-HELMHOLTZ INSTABILITY; MAGNETIC RECONNECTION; ANOMALOUS RESISTIVITY; NEUTRAL SHEET; TEARING INSTABILITY; PARTICLE SIMULATION; EARTH MAGNETOTAIL; PLASMA; STABILIZATION; TRANSPORT AB Through numerical plasma simulations using the implicit code CELESTE3D [G. Lapenta and J. U. Brackbill, Nonlinear Processes Geophys. 7, 151 (2000)], the development of kink modes in a Harris current sheet is investigated, and their possible nonlinear interaction with the lower hybrid drift instability (LHDI) is considered. Consistent with earlier work, the rapid development of a short wavelength LHDI is observed, followed by the slow development of long wavelength current sheet kinking. The growth of kink modes is in agreement with the linear theory for the drift kink instability only at very small mass ratios (m(i)/m(e)=16). At more realistic mass ratios, the growth rate exceeds that predicted by linear theory. A thorough investigation of the dependence of current sheet kinking on ion/electron mass and temperature ratios, and current sheet thickness reveals that the growth of kink modes is unaffected by current sheet thinning, but is strongly dependent on the ion/electron temperature ratio. The saturation amplitude of the LHDI increases with decreasing electron temperature, as do the nonlinear modifications of the initial equilibrium. In particular, the ion diamagnetic drift velocity of the ions decreases sufficiently on the flanks of the current sheet to support a Kelvin-Helmholtz instability, especially with cold electrons, whose properties are completely consistent with the kink modes observed in the simulations. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Lapenta, G (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. OI Lapenta, Giovanni/0000-0002-3123-4024 NR 46 TC 69 Z9 69 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1544 EP 1554 DI 10.1063/1.1464149 PN 1 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300008 ER PT J AU Myra, JR D'Ippolito, DA Xu, XQ AF Myra, JR D'Ippolito, DA Xu, XQ TI Drift wave instability near a magnetic separatrix SO PHYSICS OF PLASMAS LA English DT Article ID L-H TRANSITION; RESISTIVE DRIFT; CYLINDRICAL PLASMA; EDGE TURBULENCE; X-POINT; SHEAR; TOKAMAK; MODES; GEOMETRY; PHYSICS AB It is well known that the pure drift-Alfven wave (DW) (i.e., in the absence of curvature and toroidal coupling effects) is stabilized by magnetic shear in circular flux surface geometry when the drift frequency is constant radially [P. N. Guzdar, L. Chen, P. K. Kaw, and C. Oberman, Phys. Rev. Lett. 40, 1566 (1978)] as is implicit in a local ballooning analysis. In the edge plasma near a magnetic separatrix, X-point geometry is important and the circular flux surface model does not apply. Using several numerical codes and analytical models, it is found that the DW is robustly unstable in this case. Physically, instability is driven by wave reflection from the steep profile of k(perpendicular to) near the X-points, due to magnetic shear and the local minimum of the poloidal magnetic field. It is concluded that a complete set of dimensionless parameters describing edge turbulence must include DW parameters that embody the physics of X-point effects and plasma shaping. (C) 2002 American Institute of Physics. C1 Lodestar Res Corp, Boulder, CO 80301 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lodestar Res Corp, 2400 Cent Ave,P-5, Boulder, CO 80301 USA. NR 30 TC 1 Z9 1 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1637 EP 1645 DI 10.1063/1.1467929 PN 1 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300019 ER PT J AU Shaing, KC Houlberg, WA Strand, PI AF Shaing, KC Houlberg, WA Strand, PI TI Local potato-plateau transport fluxes and a unified plateau theory SO PHYSICS OF PLASMAS LA English DT Article ID MAGNETIC AXIS; TOKAMAKS AB A local potato-plateau transport theory is presented. It is a nonradial averaged version of the original theory [Phys. Plasmas 4, 4331 (1997); 5, 953 (1998)]. The theory unifies conventional plateau theory and the potato-plateau theory. It is applicable at any radius. It is found that the ion heat conductivity is the same as that in the conventional theory in the region close to the magnetic axis. (C) 2002 American Institute of Physics. C1 Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA. RP Shaing, KC (reprint author), Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. NR 9 TC 4 Z9 4 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1654 EP 1658 DI 10.1063/1.1468856 PN 1 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300021 ER PT J AU MacLaren, SA Faltens, A Seidl, PA Rose, DV AF MacLaren, SA Faltens, A Seidl, PA Rose, DV TI Results from a scaled final focus experiment for heavy ion fusion SO PHYSICS OF PLASMAS LA English DT Article ID CHAMBER TRANSPORT; INERTIAL FUSION; REACTOR AB A one-tenth-scale version of a final focus subsystem for a heavy-ion-fusion driver has been built and used for experimental tests of concept. By properly scaling the parameters that relate ion energy and mass, current, emittance, and focusing fields, the transverse dynamics of a representative driver final focus have been replicated in a small laboratory beam. Whereas the driver beam parameters considered are 10 GeV Bi+ at 1.25 kA, the scaled experiment used a 95 muA beam of 160 keV Cs+ ions brought to a ballistic focus through a series of six quadrupole magnets. The measured focal spot size was consistent with calculations in the report of the design on which the experiment is based. In a second experimental program, a 400 muA beam was propagated through the focal system and partially neutralized after the last magnet using electrons released from a hot tungsten filament to test the predictions of the benefits of neutralization. The increase in beam current resulted in a corresponding increase in spot radius in the absence of electrons. A reduction of the spot radius and modification of its shape were observed in the presence of neutralizing electrons. (C) 2002 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Mission Res Corp, Albuquerque, NM 87110 USA. RP MacLaren, SA (reprint author), Lawrence Livermore Natl Lab, L-015,7000 East Ave, Livermore, CA 94550 USA. NR 21 TC 15 Z9 15 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1712 EP 1720 DI 10.1063/1.1464894 PN 1 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300028 ER PT J AU Vu, HX DuBois, DF Bezzerides, B AF Vu, HX DuBois, DF Bezzerides, B TI Kinetic inflation of stimulated Raman backscatter in regimes of high linear Landau damping SO PHYSICS OF PLASMAS LA English DT Article ID DRIVEN PARAMETRIC-INSTABILITIES; INDUCED LANGMUIR TURBULENCE; ION-ACOUSTIC-WAVES; LASER HOT-SPOTS; BRILLOUIN-SCATTERING; HOHLRAUM PLASMAS; SMOOTH IONOSPHERE; FREQUENCY; PARTICLE; SATURATION AB Kinetic simulations and analysis show that backward stimulated Raman scattering (BSRS), in regimes of large linear Landau damping of the primary Langmuir wave, attains levels greatly exceeding the predictions of models based on fixed damping. These regimes are encountered in plasma conditions expected for target designs to be fielded at the National Ignition Facility [J. D. Lindl, Inertial Confinement Fusion (Springer-Verlag, New York, 1998)]. Trapped electrons in the Langmuir wave have the dual effect of reducing its damping, thereby enhancing the BSRS response, and saturating this response by phase detuning, a consequence of the trapping-induced, time-dependent, frequency shift. BSRS, then, occurs as a train of sub-picosecond pulses, arising from the competition between phase detuning and parametric regeneration. A simple three wave parametric model, including the effect of the nonlinear frequency shift and residual nonlinear damping, reproduces these essential features. A similar scenario applies to backward stimulated Brillouin scattering (BSBS). BSRS activity many orders of magnitude above noise level is found for intense laser speckles even when the primary Langmuir wave number times the Debye length is as high as 0.55. The simulation model consistently accounts for the competition of other instabilities, including BSBS, forward stimulated Raman scattering, and the Langmuir decay instability with cavitation. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Vu, HX (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 33 TC 65 Z9 65 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1745 EP 1763 DI 10.1063/1.1471235 PN 1 PG 19 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300031 ER PT J AU Carlsten, BE AF Carlsten, BE TI Small-signal analysis and particle-in-cell simulations of planar dielectric Cherenkov masers for use as high-frequency, moderate-power broadband amplifiers SO PHYSICS OF PLASMAS LA English DT Article ID FIELD EMITTER ARRAYS; KLYSTRON SIMULATION; SHEET BEAM AB A small-signal gain analysis of the planar dielectric Cherenkov maser is presented. The analysis results in a Pierce gain solution, with three traveling-wave modes. The analysis shows that the dielectric Cherenkov maser has a remarkable broadband tuning ability near cutoff, while maintaining reasonable gain rates. Numerical simulations verifying the small-signal gain results are presented, using a particle-in-cell code adapted specifically for planar traveling-wave tubes. An instantaneous bandwidth is numerically shown to be very large, and saturated efficiency for a nominal high-power design is shown to be in the range of standard untapered traveling-wave tubes. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Carlsten, BE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 17 TC 13 Z9 17 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1790 EP 1800 DI 10.1063/1.1467931 PN 1 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300035 ER PT J AU Barnes, DC AF Barnes, DC TI Stability of long field-reversed configurations (vol 9, pg 560, 2002) SO PHYSICS OF PLASMAS LA English DT Correction C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Barnes, DC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1838 EP 1838 DI 10.1063/1.1467930 PN 1 PG 1 WC Physics, Fluids & Plasmas SC Physics GA 545BX UT WOS:000175197300047 ER PT J AU Joshi, C Blue, B Clayton, CE Dodd, E Huang, C Marsh, KA Mori, WB Wang, S Hogan, MJ O'Connell, C Siemann, R Watz, D Muggli, P Katsouleas, T Lee, S AF Joshi, C Blue, B Clayton, CE Dodd, E Huang, C Marsh, KA Mori, WB Wang, S Hogan, MJ O'Connell, C Siemann, R Watz, D Muggli, P Katsouleas, T Lee, S TI High energy density plasma science with an ultrarelativistic electron beam SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID HOSE INSTABILITY; POSITRON BEAM; LONG PLASMA; ACCELERATOR; CHANNEL; LENS; PROPAGATION; RADIATION; BUNCH; LASER AB An intense, high-energy electron or positron beam can have focused intensities rivaling those of today's most powerful laser beams. For example, the 5 ps (full-width, half-maximum), 50 GeV beam at the Stanford Linear Accelerator Center (SLAC) at 1 kA and focused to a 3 micron rms spot size gives intensities of >10(20) W/cm(-2) at a repetition rate of >10 Hz. Unlike a ps or fs laser pulse which interacts with the surface of a solid target, the particle beam can readily tunnel through tens of cm of steel. However, the same particle beam can be manipulated quite effectively by a plasma that is a million times less dense than air! This is because of the incredibly strong collective fields induced in the plasma by the Coulomb force of the beam. The collective fields in turn react back onto the beam leading to many clearly observable phenomena. The beam paraticles can be: (1) Deflected leading to focusing, defocusing, or even steering of the beam; (2) undulated causing the emission of spontaneous betatron x-ray radiation and; (3) accelerated or decelerated by the plasma fields. Using the 28.5 GeV electron beam from the SLAC linac a series of experiments have been carried out that demonstrate clearly many of the above mentioned effects. The results can be compared with theoretical predictions and with two-dimensional and three-dimensional, one-to-one, particle-in-cell code simulations. These phenomena may have practical applications in future technologies including optical elements in particle beam lines, synchrotron light sources, and ultrahigh gradient accelerators. (C) 2002 American Institute of Physics. C1 Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ So Calif, Los Angeles, CA 90089 USA. RP Joshi, C (reprint author), Univ Calif Los Angeles, Los Angeles, CA 90095 USA. NR 40 TC 63 Z9 64 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1845 EP 1855 DI 10.1063/1.1455003 PN 2 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200002 ER PT J AU Tang, WM AF Tang, WM TI Advanced computations in plasma physics SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID GYROKINETIC PARTICLE SIMULATION; TEMPERATURE-GRADIENT TURBULENCE; MAGNETIC RECONNECTION; TOKAMAK EDGE; ZONAL FLOW; TOROIDAL PLASMAS; TRANSPORT; DRIVEN; TRANSITION; GEOMETRY AB Scientific simulation in tandem with theory and experiment is an essential tool for understanding complex plasma behavior. In this paper we review recent progress and future directions for advanced simulations in magnetically confined plasmas with illustrative examples chosen from magnetic confinement research areas such as microturbulence, magnetohydrodynamics, magnetic reconnection, and others. Significant recent progress has been made in both particle and fluid simulations of fine-scale turbulence and large-scale dynamics, giving increasingly good agreement between experimental observations and computational modeling. This was made possible by innovative advances in analytic and computational methods for developing reduced descriptions of physics phenomena spanning widely disparate temporal and spatial scales together with access to powerful new computational resources. In particular, the fusion energy science community has made excellent progress in developing advanced codes for which computer run-time and problem size scale well with the number of processors on massively parallel machines (MPP's). A good example is the effective usage of the full power of multi-teraflop (multi-trillion floating point computations per second) MPP's to produce three-dimensional, general geometry, nonlinear particle simulations which have accelerated progress in understanding the nature of turbulence self-regulation by zonal flows. It should be emphasized that these calculations, which typically utilized billions of particles for thousands of time-steps, would not have been possible without access to powerful present generation MPP computers and the associated diagnostic and visualization capabilities. In general, results from advanced simulations provide great encouragement for being able to include increasingly realistic dynamics to enable deeper physics insights into plasmas in both natural and laboratory environments. The associated scientific excitement should serve to stimulate improved cross-cutting collaborations with other fields and also to help attract bright young talent to plasma science. (C) 2002 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Tang, WM (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 74 TC 11 Z9 12 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1856 EP 1872 DI 10.1063/1.1467985 PN 2 PG 17 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200003 ER PT J AU Jaeger, EF Berry, LA D'Azevedo, E Batchelor, DB Carter, MD White, KF Weitzner, H AF Jaeger, EF Berry, LA D'Azevedo, E Batchelor, DB Carter, MD White, KF Weitzner, H TI Advances in full-wave modeling of radio frequency heated, multidimensional plasmas SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID ION BERNSTEIN WAVES; ALCATOR C-MOD; TOKAMAK PLASMAS; CURRENT DRIVE; ICRF; PROPAGATION; CONVERSION; ABSORPTION AB Previous full-wave models for rf heating in multidimensional plasmas have relied on either cold-plasma or finite Larmor radius approximations. These models assume that the perpendicular wavelength of the rf field is much larger than the ion Larmor radius, and they are therefore limited to relatively long wavelengths and low cyclotron harmonics. Recently, alternate full-wave models have been developed that eliminate these restrictions. These "all orders spectral algorithms" take advantage of new computational techniques for massively parallel computers to solve the integral form of the wave equation in multiple dimensions without any restriction on wavelength relative to orbit size, and with no limit on the number of cyclotron harmonics retained. These new models give high-resolution, two-dimensional solutions for mode conversion and high harmonic fast wave heating in tokamak geometry. In addition, they have been extended to give fully three-dimensional solutions of the integral wave equation for minority ion cyclotron heating in stellarator geometry. By combining multiple periodic solutions for individual helical field periods, it is possible to obtain complete wave solutions valid over the entire volume of the stellarator for arbitrary antenna geometry. (C) 2002 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NYU, Courant Inst Math Sci, New York, NY 10012 USA. RP Jaeger, EF (reprint author), Oak Ridge Natl Lab, POB 2009, Oak Ridge, TN 37831 USA. NR 30 TC 40 Z9 40 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1873 EP 1881 DI 10.1063/1.1455001 PN 2 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200004 ER PT J AU White, R Chen, L Lin, ZH AF White, R Chen, L Lin, ZH TI Resonant plasma heating below the cyclotron frequency SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID ION; WAVES AB Resonant heating of a magnetized plasma by low frequency waves of large amplitude is considered. It is shown that the magnetic moment can be changed nonadiabatically by a single large amplitude wave, even at frequencies normally considered nonresonant. Two examples clearly demonstrate the existence of the resonances leading to chaos and the generic nature of heating below the cyclotron frequency. First the classical case of an electrostatic wave of large amplitude propagating across a confining uniform magnetic field, and second a large amplitude Alfven wave, propagating obliquely across the magnetic field. Waves with frequencies a small fraction of the cyclotron frequency are shown to produce significant heating; bringing, in the case of Alfven waves, particles to speeds comparable to the Alfven velocity in a few hundred cyclotron periods. Stochastic threshold for heating occurs at significantly lower amplitude with a perturbation spectrum consisting of a number of modes. This phenomenon may have relevance for the heating of ions in the solar corona as well as for ion heating in some toroidal confinement fusion devices. (C) 2002 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. RP White, R (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI chen, liu/I-2297-2013; White, Roscoe/D-1773-2013 OI White, Roscoe/0000-0002-4239-2685 NR 10 TC 51 Z9 53 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1890 EP 1897 DI 10.1063/1.1445180 PN 2 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200006 ER PT J AU Albright, BJ Daughton, W Lemons, DS Winske, D Jones, ME AF Albright, BJ Daughton, W Lemons, DS Winske, D Jones, ME TI Quiet direct simulation of plasmas SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CA SP Amer Phys Soc, Div Plasma Phys ID BINARY COLLISION MODEL; COLLIDING PLASMAS; PARTICLE; ALGORITHM; TRANSPORT; FLOW AB A new approach to particle simulation, called "quiet direct simulation Monte Carlo" (QDSMC), is described that can be applied to many problems of interest, including hydrodynamics, magnetohydrodynamics (MHD), and the modeling of collision plasmas. The essence of QDSMC is the use of carefully chosen weights for the particles (e.g., Gauss-Hermite, for Maxwellian distributions), which are destroyed each time step after the particle information is deposited onto the grid and reconstructed at the beginning of the next time step. The method overcomes the limited dynamical range and statistical noise typically found in particle simulations. In this article QDSMC is applied to hydrodynamics and MHD test problems, and its suitability for modeling semi-collisional plasma dynamics is considered. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Div Appl Phys, Plasma Phys Grp, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Appl Phys, Plasma Phys Grp, MS-B259, Los Alamos, NM 87545 USA. EM balbright@lanl.gov RI Daughton, William/L-9661-2013 NR 34 TC 10 Z9 10 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1898 EP 1904 DI 10.1063/1.1452732 PN 2 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200007 ER PT J AU Cohen, BI Dimits, AM Nevins, WM Chen, Y Parker, S AF Cohen, BI Dimits, AM Nevins, WM Chen, Y Parker, S TI Kinetic electron closures for electromagnetic simulation of drift and shear-Alfven waves. II SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID GYROKINETIC PARTICLE SIMULATION; TURBULENCE SIMULATIONS; MODEL; PLASMAS AB An electromagnetic hybrid scheme (fluid electrons and gyrokinetic ions) is elaborated in example calculations and extended to toroidal geometry. The scheme includes a kinetic electron closure valid for beta(e)>m(e)/m(i) (beta(e) is the ratio of the plasma electron pressure to the magnetic field energy density). The new scheme incorporates partially linearized (deltaf ) drift-kinetic electrons whose pressure and number density moments are used to close the fluid momentum equation for the electron fluid (Ohm's law). The test cases used are small-amplitude kinetic shear-Alfven waves with electron Landau damping, the ion-temperature-gradient instability, and the collisionless drift instability (universal mode) in an unsheared slab as a function of the plasma beta(e). Attention is given to resolution and convergence issues in simulations of turbulent steady states. (C) 2002 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Colorado, Dept Phys, Boulder, CO 80309 USA. RP Cohen, BI (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 24 TC 10 Z9 10 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1915 EP 1924 DI 10.1063/1.1454999 PN 2 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200009 ER PT J AU Mazzucato, E Munsat, T Park, H Deng, BH Domier, CW Luhmann, NC Donne, AJH van de Pol, MJ AF Mazzucato, E Munsat, T Park, H Deng, BH Domier, CW Luhmann, NC Donne, AJH van de Pol, MJ TI Fluctuation measurements in tokamaks with microwave imaging reflectometry SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID DENSITY-FLUCTUATIONS; TURBULENT FLUCTUATIONS; PLASMAS; TRANSPORT; PHYSICS AB To study the mechanism of anomalous transport in tokamaks requires the use of sophisticated diagnostic tools for the measurement of short-scale turbulent fluctuations. In this article, we describe an attempt at developing a technique capable of providing a comprehensive description of plasma fluctuations with k(perpendicular to)rho(i)<1, such as those driven by the ion temperature gradient mode in tokamaks. The proposed method is based on microwave reflectometry, and stems from a series of numerical calculations showing that the spatial structure of fluctuations near the cutoff could be obtained from the phase of reflected waves when these are collected with a wide aperture optical system forming an image of the cutoff onto an array of phase sensitive detectors. Preliminary measurements with a prototype apparatus on the Torus Experiment for Technology Oriented Research 94 (TEXTOR-94) [U. Samm, Proceedings of the 16th IEEE Symposium on Fusion Engineering, 1995 (IEEE, Piscataway, NJ, 1995), p. 470] confirm the validity of these conclusions. Technical issues in the application of the proposed technique to tokamaks are discussed in this article, and the conceptual design of an imaging reflectometer for the visualization of turbulent fluctuations in the National Spherical Torus Experiment (NSTX) [M. Ono , Nucl. Fusion 40, 557 (2000)] is described. (C) 2002 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. EURATOM, FOM, Inst Plasmafys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands. RP Mazzucato, E (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 21 TC 30 Z9 30 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1955 EP 1961 DI 10.1063/1.1435564 PN 2 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200014 ER PT J AU Zweben, SJ Stotler, DP Terry, JL LaBombard, B Greenwald, M Muterspaugh, M Pitcher, CS Hallatschek, K Maqueda, RJ Rogers, B Lowrance, JL Mastrocola, VJ Renda, GF AF Zweben, SJ Stotler, DP Terry, JL LaBombard, B Greenwald, M Muterspaugh, M Pitcher, CS Hallatschek, K Maqueda, RJ Rogers, B Lowrance, JL Mastrocola, VJ Renda, GF CA Alcator C-Mod Grp TI Edge turbulence imaging in the Alcator C-Mod tokamak SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID SCRAPE-OFF LAYER; MAGNETIC CONFINEMENT DEVICES; DIII-D TOKAMAK; ELECTROSTATIC FLUCTUATIONS; INTERMITTENT CONVECTION; ANOMALOUS TRANSPORT; PARTICLE-TRANSPORT; PLASMA TURBULENCE; TRANSITION; DENSITY AB The two-dimensional (2D) radial vs poloidal structure of edge turbulence in the Alcator C-Mod tokamak [I. H. Hutchinson, R. Boivin, P. T. Bonoli , Nucl. Fusion 41, 1391 (2001)] was measured using fast cameras and compared with three-dimensional numerical simulations of edge plasma turbulence. The main diagnostic is gas puff imaging, in which the visible D-alpha emission from a localized D-2 gas puff is viewed along a local magnetic field line. The observed D-alpha fluctuations have a typical radial and poloidal scale of approximate to1 cm, and often have strong local maxima ("blobs") in the scrape-off layer. The motion of this 2D structure motion has also been measured using an ultrafast framing camera with 12 frames taken at 250 000 frames/s. Numerical simulations produce turbulent structures with roughly similar spatial and temporal scales and transport levels as that observed in the experiment; however, some differences are also noted, perhaps requiring diagnostic improvement and/or additional physics in the numerical model. (C) 2002 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08540 USA. MIT, Cambridge, MA 02139 USA. Ctr Interdisciplinary Plasma Studies, Max Planck Inst Plasmaphys, D-85748 Garching, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Dartmouth Coll, Hanover, NH 03755 USA. Princeton Sci Instruments, Monmouth Jct, NJ 08852 USA. RP Zweben, SJ (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08540 USA. RI Stotler, Daren/J-9494-2015; OI Stotler, Daren/0000-0001-5521-8718; Greenwald, Martin/0000-0002-4438-729X NR 31 TC 171 Z9 172 U1 0 U2 9 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1981 EP 1989 DI 10.1063/1.1445179 PN 2 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200017 ER PT J AU Redi, MH Johnson, JL Klasky, S Canik, J Dewar, RL Cooper, WA AF Redi, MH Johnson, JL Klasky, S Canik, J Dewar, RL Cooper, WA TI Anderson localization of ballooning modes, quantum chaos and the stability of compact quasiaxially symmetric stellarators SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CA SP Amer Phys Soc, Div Plasma Phys ID INSTABILITIES; SPECTRUM; EQUILIBRIA; TOKAMAK; PLASMAS; DESIGN AB The radially local magnetohydrodynamic (MHD) ballooning stability of a compact, quasiaxially symmetric stellarator (QAS), is examined just above the ballooning beta limit with a method that can lead to estimates of global stability. Here MHD stability is analyzed through the calculation and examination of the ballooning mode eigenvalue isosurfaces in the 3-space (s,alpha,theta(k)); s is the edge normalized toroidal flux, alpha is the field line variable, and theta(k) is the perpendicular wave vector or ballooning parameter. Broken symmetry, i.e., deviations from axisymmetry, in the stellarator magnetic field geometry causes localization of the ballooning mode eigenfunction, and gives rise to new types of nonsymmetric eigenvalue isosurfaces in both the stable and unstable spectrum. For eigenvalues far above the marginal point, isosurfaces are topologically spherical, indicative of strong "quantum chaos." The complexity of QAS marginal isosurfaces suggests that finite Larmor radius stabilization estimates will be difficult and that fully three-dimensional, high-n MHD computations are required to predict the beta limit. (C) 2002 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. Australian Natl Univ, Dept Theoret Phys, Canberra, ACT 0200, Australia. Ecole Polytech Fed Lausanne, CH-1007 Lausanne, Switzerland. RP Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM redi@pppl.gov RI Dewar, Robert/B-1300-2008; OI Dewar, Robert/0000-0002-9518-7087; Canik, John/0000-0001-6934-6681 NR 27 TC 3 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1990 EP 1996 DI 10.1063/1.1448344 PN 2 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200018 ER PT J AU Garofalo, AM Jensen, TH Johnson, LC La Haye, RJ Navratil, GA Okabayashi, M Scoville, JT Strait, EJ Baker, DR Bialek, J Chu, MS Ferron, JR Jayakumar, J Lao, LL Makowski, MA Reimerdes, H Taylor, TS Turnbull, AD Wade, MR Wong, SK AF Garofalo, AM Jensen, TH Johnson, LC La Haye, RJ Navratil, GA Okabayashi, M Scoville, JT Strait, EJ Baker, DR Bialek, J Chu, MS Ferron, JR Jayakumar, J Lao, LL Makowski, MA Reimerdes, H Taylor, TS Turnbull, AD Wade, MR Wong, SK TI Sustained rotational stabilization of DIII-D plasmas above the no-wall beta limit SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID FEEDBACK STABILIZATION; ADVANCED TOKAMAK; ERROR-FIELD; MODE; DISCHARGES; SHEAR; CONFINEMENT; PERFORMANCE; STABILITY; SHELL AB Sustained stabilization of the n=1 kink mode by plasma rotation at beta approaching twice the stability limit calculated without a wall has been achieved in DIII-D by a combination of error field reduction and sufficient rotation drive. Previous experiments have transiently exceeded the no-wall beta limit. However, demonstration of sustained rotational stabilization has remained elusive because the rotation has been found to decay whenever the plasma is wall stabilized. Recent theory [Boozer, Phys. Rev. Lett. 86, 5059 (2001)] predicts a resonant response to error fields in a plasma approaching marginal stability to a low-n kink mode. Enhancement of magnetic nonaxisymmetry in the plasma leads to strong damping of the toroidal rotation, precisely in the high-beta regime where it is needed for stabilization. This resonant response, or "error field amplification" is demonstrated in DIII-D experiments: applied n=1 radial fields cause enhanced plasma response and strong rotation damping at beta above the no wall limit but have little effect at lower beta. The discovery of an error field amplification has led to sustained operation above the no-wall limit through improved magnetic field symmetrization using an external coil set. The required symmetrization is determined both by optimizing the external currents with respect to the plasma rotation and by use of feedback to detect and minimize the plasma response to nonaxisymmetric fields as beta increases. Ideal stability analysis and rotation braking experiments at different beta values show that beta is maintained 50% higher than the no wall stability limit for durations greater than 1 s, and approaches beta twice the no-wall limit in several cases, with steady-state rotation levels. The results suggest that improved magnetic-field symmetry could allow plasmas to be maintained well above no-wall beta limit for as long as sufficient torque is provided. (C) 2002 American Institute of Physics. C1 Gen Atom Co, San Diego, CA 92186 USA. Columbia Univ, New York, NY USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Garofalo, AM (reprint author), Gen Atom Co, Box 85608, San Diego, CA 92186 USA. NR 34 TC 121 Z9 121 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 1997 EP 2005 DI 10.1063/1.1446036 PN 2 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200019 ER PT J AU Hegna, CC Hudson, SR AF Hegna, CC Hudson, SR TI Ideal magnetohydrodynamic ballooning stability boundaries in three-dimensional equilibria SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID HELIOTRON/TORSATRON SYSTEM; MODE SPECTRUM; MHD STABILITY; ASPECT RATIO; STELLARATOR; CONFIGURATIONS; PLASMAS; SHEAR AB The impact of three-dimensional geometry on ideal magnetohydrodynamic ballooning mode stability is studied. By using a class of "local 3D equilibria" [C. C. Hegna, Phys. Plasmas 7, 3921 (2000)], the effects of plasma shaping, profile variations and symmetry on local plasma physics properties can be addressed. As an example, a local helical axis equilibrium case is constructed that models the magnetic field spectrum of a quasihelically symmetric stellarator. In this case, the magnetic harmonic structure of the local shear (which can be manipulated via changes in the magnetic geometry) has an important impact on the stability boundaries and eigenvalue properties of three-dimensional equilibria. The presence of symmetry breaking components in the local shear produces localized field-line-dependent ballooning instabilities in regions of small average shear. These effects lower first ballooning stability thresholds and can eliminate the second stability regime. A geometric interpretation of these results is given. (C) 2002 American Institute of Physics. C1 Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Hegna, CC (reprint author), Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. RI Hudson, Stuart/H-7186-2013 OI Hudson, Stuart/0000-0003-1530-2733 NR 26 TC 5 Z9 5 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2014 EP 2019 DI 10.1063/1.1446037 PN 2 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200021 ER PT J AU Snyder, PB Wilson, HR Ferron, JR Lao, LL Leonard, AW Osborne, TH Turnbull, AD Mossessian, D Murakami, M Xu, XQ AF Snyder, PB Wilson, HR Ferron, JR Lao, LL Leonard, AW Osborne, TH Turnbull, AD Mossessian, D Murakami, M Xu, XQ TI Edge localized modes and the pedestal: A model based on coupled peeling-ballooning modes SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID IDEAL MAGNETOHYDRODYNAMIC INSTABILITIES; DIII-D; DIAMAGNETIC STABILIZATION; TRANSPORT BARRIER; PLASMA SHAPE; STABILITY; TOKAMAKS; PROGRESS; PHYSICS; REGION AB A model based on magnetohydrodynamic (MHD) stability of the tokamak plasma edge region is presented, which describes characteristics of edge localized modes (ELMs) and the pedestal. The model emphasizes the dual role played by large bootstrap currents driven by the sharp pressure gradients in the pedestal region. Pedestal currents reduce the edge magnetic shear, stabilizing high toroidal mode number (n) ballooning modes, while at the same time providing drive for intermediate to low n peeling modes. The result is that coupled peeling-ballooning modes at intermediate n (32). Toroidal and normalized beta have exceeded 25% and 4.3, respectively, in qsimilar to7 plasmas. The beta limit is observed to increase and then saturate with increasing l(i). The stability factor beta(N)/l(i) has reached 6, limited by sudden beta collapses. Increased pressure peaking leads to a decrease in beta(N). Ideal stability analysis of equilibria reconstructed with EFIT [L. L. Lao , Nucl. Fusion 25, 1611 (1985)] shows that the plasmas are at the no-wall beta limit for the n=1 kink/ballooning mode. Low aspect ratio and high edge q theoretically alter the plasma stability and mode structure compared to standard tokamak configurations. Below the no-wall limit, stability calculations show the perturbed radial field is maximized near the center column and mode stability is not highly effected by a nearby conducting wall due to the short poloidal wavelength in this region. In contrast, as beta reaches and exceeds the no-wall limit, the mode becomes strongly ballooning with long poloidal wavelength at large major radius and is highly wall stabilized. In this way, wall stabilization is more effective at higher beta in low aspect ratio geometry. The resistive wall mode has been observed in plasmas exceeding the ideal no-wall beta limit and leads to rapid toroidal rotation damping across the plasma core. (C) 2002 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Gen Atom Co, San Diego, CA 92186 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Sabbagh, SA (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI Sabbagh, Steven/C-7142-2011; Stutman, Dan/P-4048-2015; OI Menard, Jonathan/0000-0003-1292-3286 NR 36 TC 52 Z9 52 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2085 EP 2092 DI 10.1063/1.1468230 PN 2 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200030 ER PT J AU Glasser, AH Cohen, SA AF Glasser, AH Cohen, SA TI Ion and electron acceleration in the field-reversed configuration with an odd-parity rotating magnetic field SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID CURRENT DRIVE; TILT MODE; STABILITY; DYNAMICS; ROTAMAK; ORBITS AB The method for accelerating ions and electrons in the field-reversed configuration using odd-parity rotating magnetic fields (RMFs) in the ion-cyclotron range-of-frequencies (ICRF) is studied. The approach is based on long, accurate numerical integration of Hamilton's equations for single-particle orbits. Rapid ion heating to thermonuclear conditions occurs in <0.1 ms in a modest-sized FRC. Strong variation of the magnetic-field strength over the confinement region prevents a true cyclotron resonance, resulting in stochastic though effective heating. Lyapunov exponents are computed to demonstrate chaotic orbits. Electrons are also effectively heated in this frequency range, primarily by a mechanism involving trapping in the wells of the azimuthal electric field. Odd-parity RMF promotes oppositely directed ion and electron motion near the minor axis, appropriate for supporting the plasma current. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Glasser, AH (reprint author), Los Alamos Natl Lab, Mail Stop K717,POB 1663, Los Alamos, NM 87545 USA. NR 26 TC 17 Z9 17 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2093 EP 2102 DI 10.1063/1.1459456 PN 2 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200031 ER PT J AU Suttrop, W Ongena, J Becoulet, M Cordey, JG Dumortier, P Huysmans, GTA Lang, PT Loarte, A Lomas, PJ Saibene, G Sartori, R Parail, VV Valovic, M Andrew, P Andrew, Y Beurskens, MNA Budny, R Charlet, M Coffey, I Eich, T Gowers, C Hillis, DL Hogan, J Ingesson, LC Jachmich, S Kallenbach, A Koslowski, HR Lawson, KD Maddison, GP Maraschek, ME McDonald, DC Messiaen, A Milani, F Monier-Garbet, P Nave, MFF Puiatti, ME Rapp, J Righi, E Sauter, O Sartori, F Schweinzer, J Stamp, M Strachan, JD Stober, J Telesca, G Unterberg, B Valisa, M de Vries, P Weyssow, B Zastrow, KD AF Suttrop, W Ongena, J Becoulet, M Cordey, JG Dumortier, P Huysmans, GTA Lang, PT Loarte, A Lomas, PJ Saibene, G Sartori, R Parail, VV Valovic, M Andrew, P Andrew, Y Beurskens, MNA Budny, R Charlet, M Coffey, I Eich, T Gowers, C Hillis, DL Hogan, J Ingesson, LC Jachmich, S Kallenbach, A Koslowski, HR Lawson, KD Maddison, GP Maraschek, ME McDonald, DC Messiaen, A Milani, F Monier-Garbet, P Nave, MFF Puiatti, ME Rapp, J Righi, E Sauter, O Sartori, F Schweinzer, J Stamp, M Strachan, JD Stober, J Telesca, G Unterberg, B Valisa, M de Vries, P Weyssow, B Zastrow, KD CA EFDA-JET Workprogramme TI High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET) SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CA SP Amer Phys Soc, Div Plasma Phys ID ELMY H-MODES; ASDEX UPGRADE; PELLET INJECTION; VARIED GEOMETRY; RECENT PROGRESS; TOKAMAKS; TEXTOR; POWER; IDENTIFICATION; TRIANGULARITY AB Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy confinement time as predicted by the International Thermonuclear Experimental Reactor ITER-H98(y,2) scaling at densities near or in excess of 85% of the Greenwald density limit scaling has been obtained by (i) strong plasma shaping (triangularity 0.3510(19) W/cm(2)) short pulses with thin solid targets are most suited for use as a particle probe in laser-plasma experiments. The recently developed proton imaging technique employs the beams in a point-projection imaging scheme as a diagnostic tool for the detection of electric fields in laser-plasma interaction experiments. In recent investigations carried out at the Rutherford Appleton Laboratory (RAL, UK), a wide range of laser-plasma interaction conditions of relevance for inertial confinement fusion (ICF)/fast ignition has been explored. Among the results obtained will be discussed: the electric field distribution in laser-produced long-scale plasmas of ICF interest; the measurement of highly transient electric fields related to the generation and dynamics of hot electron currents following ultra-intense laser irradiation of targets; the observation in underdense plasmas, after the propagation of ultra-intense laser pulses, of structures identified as the remnants of solitons produced in the wake of the pulse. (C) 2002 American Institute of Physics. C1 Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England. Univ Dusseldorf, Inst Laser & Plasmaphys, D-4000 Dusseldorf, Germany. Lawrence Livermore Natl Lab, Livermore, CA USA. CNR, Ist Fis Atom & Mol, Intense Laser Irradiat Lab, I-56100 Pisa, Italy. Rutherford Appleton Lab, Cent Laser Facil, Chilton OX11 0QX, England. Univ Pisa, Dipartimento Fis, Pisa, Italy. INFM, Pisa, Italy. Gen Atom Co, San Diego, CA USA. Russian Acad Sci, Inst Gen Phys, Moscow, Russia. RP Borghesi, M (reprint author), Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland. RI Bulanov, Sergei/A-1721-2013; Patel, Pravesh/E-1400-2011; Galimberti, Marco/J-8376-2016; Schiavi, Angelo/D-2924-2017; Gizzi, Leonida/F-4782-2011; Borghesi, Marco/K-2974-2012; MacKinnon, Andrew/P-7239-2014 OI Galimberti, Marco/0000-0003-0661-7282; Schiavi, Angelo/0000-0002-7081-2747; Gizzi, Leonida A./0000-0001-6572-6492; Pegoraro, Francesco/0000-0002-7216-5491; MacKinnon, Andrew/0000-0002-4380-2906 NR 36 TC 275 Z9 284 U1 4 U2 23 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2214 EP 2220 DI 10.1063/1.1459457 PN 2 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200047 ER PT J AU Amendt, P Colvin, JD Tipton, RE Hinkel, DE Edwards, MJ Landen, OL Ramshaw, JD Suter, LJ Varnum, WS Watt, RG AF Amendt, P Colvin, JD Tipton, RE Hinkel, DE Edwards, MJ Landen, OL Ramshaw, JD Suter, LJ Varnum, WS Watt, RG TI Indirect-drive noncryogenic double-shell ignition targets for the National Ignition Facility: Design and analysis SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID INERTIAL CONFINEMENT FUSION; RAYLEIGH-TAYLOR INSTABILITY; VARIABLE ACCELERATION; FLUID INTERFACES; SIMPLE-MODEL AB Analysis and design of indirect-drive National Ignition Facility double-shell targets with hohlraum temperatures of 200 eV and 250 eV are presented. The analysis of these targets includes the assessment of two-dimensional radiation asymmetry and nonlinear mix. Two-dimensional integrated hohlraum simulations indicate that the x-ray illumination can be adjusted to provide adequate symmetry control in hohlraums specially designed to have high laser-coupling efficiency [Suter , Phys. Plasmas 7, 2092 (2000)]. These simulations also reveal the need to diagnose and control localized 10-15 keV x-ray emission from the high-Z hohlraum wall because of strong absorption by the high-Z inner shell. Preliminary estimates of the degree of laser backscatter from an assortment of laser-plasma interactions suggest comparatively benign hohlraum conditions. The application of a variety of nonlinear mix models and phenomenological tools, including buoyancy-drag models, multimode simulations and fall-line optimization, indicates a possibility of achieving ignition, i.e., fusion yields greater than 1 MJ. Planned experiments on the Omega laser will test current understanding of high-energy radiation flux asymmetry and mix-induced yield degradation in double-shell targets. (C) 2002 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Amendt, P (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 26 TC 70 Z9 71 U1 2 U2 12 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2221 EP 2233 DI 10.1063/1.1459451 PN 2 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200048 ER PT J AU Foster, JM Wilde, BH Rosen, PA Perry, TS Fell, M Edwards, MJ Lasinski, BF Turner, RE Gittings, ML AF Foster, JM Wilde, BH Rosen, PA Perry, TS Fell, M Edwards, MJ Lasinski, BF Turner, RE Gittings, ML TI Supersonic jet and shock interactions SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID INERTIAL CONFINEMENT FUSION; LASER-PRODUCED PLASMAS; SIMULATION; TARGETS; DYNAMICS; FLOWS; TIME; INSTABILITY; COLLAPSE; SCHEME AB Supersonic fluid flow and the interaction of strong shock waves to produce jets of material are ubiquitous features of inertial confinement fusion (ICF), astrophysics, and other fields of high energy-density science. The availability of large laser systems provides an opportunity to investigate such hydrodynamic systems in the laboratory, and to test their modeling by radiation hydrocodes. We describe experiments to investigate the propagation of a structured shock front within a radiation-driven target assembly, the formation of a supersonic jet of material, and the subsequent interaction of this jet with an ambient medium in which a second, ablatively driven shock wave is propagating. The density distribution within the jet, the Kelvin-Helmholz roll-up at the tip of the jet, and the jet's interaction with the counterpropagating shock are investigated by x-ray backlighting. The experiments were designed and modeled using radiation hydrocodes developed by Los Alamos National Laboratory, AWE, and Lawrence Livermore National Laboratory. The same hydrocodes are being used to model a large number of other ICF and high energy-density physics experiments. Excellent agreement between the different simulations and the experimental data is obtained, but only when the full geometry of the experiment, including both laser-heated hohlraum targets (driving the jet and counter-propagating shock), is included. The experiments were carried out at the University of Rochester's Omega laser [J. M. Soures , Phys. Plasmas 3, 2108 (1996)]. (C) 2002 American Institute of Physics. C1 AWE Aldermaston, Reading RG7 4PR, Berks, England. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Sci Applicat Int Corp, San Diego, CA 92121 USA. RP Foster, JM (reprint author), AWE Aldermaston, Reading RG7 4PR, Berks, England. RI Perry, Theodore/K-3333-2014 OI Perry, Theodore/0000-0002-8832-2033 NR 49 TC 65 Z9 65 U1 2 U2 10 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2251 EP 2263 DI 10.1063/101468858 PN 2 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200051 ER PT J AU Montgomery, DS Cobble, JA Fernandez, JC Focia, RJ Johnson, RP Renard-LeGalloudec, N Rose, HA Russell, DA AF Montgomery, DS Cobble, JA Fernandez, JC Focia, RJ Johnson, RP Renard-LeGalloudec, N Rose, HA Russell, DA TI Recent Trident single hot spot experiments: Evidence for kinetic effects, and observation of Langmuir decay instability cascade SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID STIMULATED RAMAN-SCATTERING; ION-ACOUSTIC-WAVES; DRIVEN PARAMETRIC-INSTABILITIES; INERTIAL CONFINEMENT FUSION; PLASMA-WAVES; THOMSON SCATTERING; ELECTRON-PLASMA; LASER PLASMAS; IGNITION; HOLES AB Single hot spot experiments offer several unique opportunities for developing a quantitative understanding of laser-plasma instabilities. These include the ability to perform direct numerical simulations of the experiment due to the finite interaction volume, isolation of instabilities due to the nearly ideal laser intensity distribution, and observation of fine structure due to the homogeneous plasma initial conditions. Experiments performed at Trident in the single hot spot regime have focused on the following issues. First, the intensity scaling of stimulated Raman scattering (SRS) for classically large damping regimes (klambda(D)=0.35) was examined, and compared to classical SRS theory. SRS onset was observed at intensities much lower than expected (2x10(15) W/cm(2)), from which nonclassical damping is inferred. Second, Thomson scattering was used to probe plasma waves driven by SRS, and structure was observed in the scattered spectra consistent with multiple steps of the Langmuir decay instability. Finally, scattering from a plasma wave was observed whose frequency and phase velocity are between an ion acoustic wave and an electron plasma wave. The presence of this wave cannot be explained by linear Landau theory, and it is shown to be consistent with a BGK-type mode due to electron trapping. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Montgomery, DS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Fernandez, Juan/H-3268-2011; OI Fernandez, Juan/0000-0002-1438-1815; Montgomery, David/0000-0002-2355-6242 NR 43 TC 96 Z9 97 U1 3 U2 10 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2311 EP 2320 DI 10.1063/1.1468857 PN 2 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200057 ER PT J AU Choe, GS Cheng, CZ AF Choe, GS Cheng, CZ TI A model of solar flares based on arcade field reconnection and merging of magnetic islands SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CA SP Amer Phys Soc, Div Plasma Phys ID PLASMA EJECTION; PROMINENCES; EVOLUTION; DISRUPTION; DYNAMICS; SHEARING AB Solar flares are intense, abrupt releases of energy in the solar corona. In the impulsive phase of a flare, the intensity of hard x-ray emission reaches a sharp peak indicating the highest reconnection rate. It is often observed that an x-ray emitting plasma ejecta (plasmoid) is launched before the impulsive phase and accelerated throughout the phase. Thus, the plasmoid ejection may not be an effect of fast magnetic reconnection as conventionally assumed, but a cause of fast reconnection. Based on resistive magnetohydrodynamic simulations, a solar flare model is presented, which can explain these observational characteristics of flares. In the model, merging of a newly generated magnetic island and a preexisting island results in stretching and thinning of a current sheet, in which fast magnetic reconnection is induced. Recurrence of homologous flares naturally arises in this model. Mechanisms of magnetic island formation are also discussed. (C) 2002 American Institute of Physics. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RI Choe, Gwangson/E-2366-2013; Cheng, Chio/K-1005-2014 NR 42 TC 4 Z9 4 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2330 EP 2336 DI 10.1063/1.1435565 PN 2 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200059 ER PT J AU Welch, DR Rose, DV Oliver, BV Genoni, TC Clark, RE Olson, CL Yu, SS AF Welch, DR Rose, DV Oliver, BV Genoni, TC Clark, RE Olson, CL Yu, SS TI Simulations of intense heavy ion beams propagating through a gaseous fusion target chamber SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID SELF-PINCHED TRANSPORT; PLASMA-CHANNEL; CURRENT NEUTRALIZATION; CHARGE; REACTOR; GAS AB In heavy-ion inertial confinement fusion (HIF), an ion beam is transported several meters through the reactor chamber to the target. This standoff distance mitigates damage to the accelerator from the target explosion. For the high perveance beams and millimeter-scale targets under consideration, the transport method is largely determined by the degree of ion charge and current neutralization in the chamber. This neutralization becomes increasingly difficult as the beam interacts with the ambient chamber environment and strips to higher charge states. Nearly complete neutralization permits neutralized-ballistic transport (main-line HIF transport method), where the ion beam enters the chamber at roughly 3-cm radius and focuses onto the target. In the backup pinched-transport schemes, the beam is first focused outside the chamber before propagating at small radius to the target. With nearly complete charge neutralization, the large beam divergence is contained by a strong magnetic field resulting from roughly 50-kA net current. In assisted-pinched transport, a preformed discharge channel provides the net current and the discharge plasma provides nearly complete charge and current neutralization of the beam. In self-pinched transport, the residual net current results solely from the beam-driven breakdown of the ambient gas. Using hybrid particle-in-cell simulation codes, the behavior of HIF driver-scale beams in these three transport modes is examined. Simulations of neutralized ballistic transport, at a few-mTorr flibe pressure, show excellent neutralization given a preformed or photoionized (from the heated target) plasma. Two- and three-dimensional simulations of assisted-pinch transport in roughly 1-Torr Xe show the importance of attaining >1-mus magnetic diffusion time to limit self-field effects and achieve good transport efficiency. For Xe gas pressures ranging from 10-150 mTorr, calculations predict a robust self-magnetic force sufficient for self-pinched transport. The latest simulation results are presented and the important remaining issues for each transport scheme are discussed. (C) 2002 American Institute of Physics. C1 Mission Res Corp, Albuquerque, NM 87110 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Welch, DR (reprint author), Mission Res Corp, 5001 Indian Sch Rd NE, Albuquerque, NM 87110 USA. NR 41 TC 39 Z9 39 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2344 EP 2353 DI 10.1063/1.1448831 PN 2 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200061 ER PT J AU Shvets, G Fisch, NJ Pukhov, A AF Shvets, G Fisch, NJ Pukhov, A TI Excitation of accelerating plasma waves by counter-propagating laser beams SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID ELECTRON ACCELERATION; WAKEFIELD ACCELERATION; GENERATION AB The conventional approach to exciting high phase velocity waves in plasmas is to employ a laser pulse moving in the direction of the desired particle acceleration. Photon downshifting then causes momentum transfer to the plasma and wave excitation. Novel approaches to plasma wake excitation, colliding-beam accelerator (CBA), which involve photon exchange between the long and short counter-propagating laser beams, are described. Depending on the frequency detuning Deltaomega between beams and duration tau(L) of the short pulse, there are two approaches to CBA. First approach assumes (tau(L)approximate to2/omega(p)). Photons exchanged between the beams deposit their recoil momentum in the plasma driving the plasma wake. Frequency detuning between the beams determines the direction of the photon exchange, thereby controlling the phase of the plasma wake. This phase control can be used for reversing the slippage of the accelerated particles with respect to the wake. A variation on the same theme, super-beatwave accelerator, is also described. In the second approach, a short pulse with tau(L)>omega(p)(-1) detuned by Deltaomegasimilar to2omega(p) from the counter-propagating beam is employed. While parametric excitation of plasma waves by the electromagnetic beatwave at 2omega(p) of two co-propagating lasers was first predicted by Rosenbluth and Liu [M. N. Rosenbluth and C. S. Liu, Phys. Rev. Lett. 29, 701 (1972)], it is demonstrated that the two excitation beams can be counter-propagating. The advantages of using this geometry (higher instability growth rate, insensitivity to plasma inhomogeneity) are explained, and supporting numerical simulations presented. (C) 2002 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Max Planck Inst Quantum Opt, D-85748 Garching, Germany. RP Shvets, G (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI pukhov, alexander/C-8082-2016 NR 22 TC 12 Z9 13 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2383 EP 2392 DI 10.1063/1.1468649 PN 2 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200066 ER PT J AU Apruzese, JP Davis, J Whitney, KG Thornhill, JW Kepple, PC Clark, RW Deeney, C Coverdale, CA Sanford, TWL AF Apruzese, JP Davis, J Whitney, KG Thornhill, JW Kepple, PC Clark, RW Deeney, C Coverdale, CA Sanford, TWL TI The physics of radiation transport in dense plasmas SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID ROSSELAND MEAN OPACITY; INERTIAL CONFINEMENT FUSION; OPTICALLY THICK PLASMAS; SIMILAR ATOMIC NUMBERS; Z-PINCH IMPLOSIONS; X-RAY; ALUMINUM; DRIVE; PERFORMANCE; HOHLRAUMS AB Radiation transport redistributes energy within a medium through the emission and reabsorption of photons. These processes also have a pronounced effect on the spectrum of radiation that escapes the medium. As the deliverable energies of plasma drivers such as lasers and pulsed-power generators steadily increase, denser and/or more massive plasmas can be created. Such plasmas are more absorptive to their own emitted radiation, with portions of the line spectrum frequently being highly opaque. Thus, radiation transport becomes more important, along with the need to consider its impact on the design of experiments and their diagnosis. This tutorial paper covers the basic theory and equations describing radiation transport, its physical effects, experimental examples of transport phenomena, and current challenges and issues. Among the specific topics discussed are requirements for local thermodynamic equilibrium (LTE), conditions for diffusion and the use of the diffusion approximation, the formation of emission and absorption lines, the approach of an emitted spectrum to the Planck limit, and diagnostic applications of transport effects. (C) 2002 American Institute of Physics. C1 USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Apruzese, JP (reprint author), USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA. NR 48 TC 41 Z9 45 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2411 EP 2419 DI 10.1063/1.1446038 PN 2 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200070 ER PT J AU Catravas, P Esarey, E Leemans, WP AF Catravas, P Esarey, E Leemans, WP TI Radiation sources and diagnostics with ultrashort electron bunches SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 43rd Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY OCT 29-NOV 02, 2001 CL LONG BEACH, CALIFORNIA SP Amer Phys Soc, Div Plasma Phys ID OPTICAL-TRANSITION-RADIATION; 90-DEGREES THOMSON SCATTERING; LASER WAKEFIELD ACCELERATORS; FEMTOSECOND X-RAYS; BEAM DIAGNOSTICS; PLASMA; PULSES; GENERATION; MICROWIGGLER AB The basic principles and design of radiation sources (transition radiation, Cerenkov radiation, radiation from periodic structures, etc.) and radiation-based diagnostics will be discussed, with an emphasis on radiation from ultrashort electron bunches. Ultrashort electron bunches have the potential to produce high peak flux radiation sources that cover wavelength regimes where sources are currently not widely available (coherent THz/IR) as well as ultrashort x-ray pulses (3-100 fs). While radiation from the electron bunch contains the full signature of the electron beam and/or medium it has traveled through, the deconvolution of a single property of interest can be difficult due to a large number of contributing properties. The experimental implementation of novel solutions to this problem will be described for beams from 30 MeV to 30 GeV, including fluctuational interferometry, source imaging, phase matched cone angles and laser-based techniques, which utilize optical transition radiation, wiggler and Cerenkov radiation, and Thomson scattering. These novel diagnostic methods have the potential to resolve fs bunch durations, slice emittance on fs scales, etc. The advantages and novel features of these techniques will be discussed. (C) 2002 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, OASIS Grp, Berkeley, CA 94720 USA. RP Catravas, P (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, OASIS Grp, Berkeley, CA 94720 USA. NR 45 TC 9 Z9 9 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2428 EP 2436 DI 10.1063/1.1463066 PN 2 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200072 ER PT J AU Gary, SP AF Gary, SP TI Mini-conference on magnetic reconnection in space and astrophysical plasmas SO PHYSICS OF PLASMAS LA English DT Editorial Material ID DRIFT-KINK INSTABILITY; CURRENT SHEET; COLLISIONLESS RECONNECTION; NEUTRAL SHEET; KINETIC-THEORY; MODEL AB A mini-conference on magnetic reconnection in space and astrophysical plasmas was held as part of the American Physical Society Division of Plasma Physics Fall 2001 Meeting 30 October-2 November 2001. This paper provides a summary of some major physics issues discussed during this mini-conference. (C) 2002 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gary, SP (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 30 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2002 VL 9 IS 5 BP 2437 EP 2439 DI 10.1063/1.1461387 PN 2 PG 3 WC Physics, Fluids & Plasmas SC Physics GA 545CG UT WOS:000175198200073 ER PT J AU Sanford, JR Orr, R Goldwasser, EL AF Sanford, JR Orr, R Goldwasser, EL TI Timothy Edward Toohig - Obituary SO PHYSICS TODAY LA English DT Biographical-Item C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Illinois, Urbana, IL 61801 USA. RP Sanford, JR (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD MAY PY 2002 VL 55 IS 5 BP 81 EP 82 DI 10.1063/1.1485601 PG 2 WC Physics, Multidisciplinary SC Physics GA 547KT UT WOS:000175332100027 ER PT J AU Crease, RP AF Crease, RP TI The most beautiful experiment .... SO PHYSICS WORLD LA English DT Editorial Material C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8585 J9 PHYS WORLD JI Phys. World PD MAY PY 2002 VL 15 IS 5 BP 17 EP 17 PG 1 WC Physics, Multidisciplinary SC Physics GA 548WM UT WOS:000175412900016 ER PT J AU Burrell, KH Austin, ME Brennan, DP DeBoo, JC Doyle, EJ Gohil, P Greenfield, CM Groebner, RJ Lao, LL Luce, TC Makowski, MA McKee, GR Moyer, RA Osborne, TH Porkolab, M Rhodes, TL Rost, JC Schaffer, MJ Stallard, BW Strait, EJ Wade, MR Wang, G Watkins, JG West, WP Zeng, L AF Burrell, KH Austin, ME Brennan, DP DeBoo, JC Doyle, EJ Gohil, P Greenfield, CM Groebner, RJ Lao, LL Luce, TC Makowski, MA McKee, GR Moyer, RA Osborne, TH Porkolab, M Rhodes, TL Rost, JC Schaffer, MJ Stallard, BW Strait, EJ Wade, MR Wang, G Watkins, JG West, WP Zeng, L TI Quiescent H-mode plasmas in the DIII-D tokamak SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID ALCATOR C-MOD; CONFINEMENT; DISCHARGES; PROFILES; PHYSICS; REGIME AB H-mode operation is the choice for next-step tokamak devices based either on conventional or advanced tokamak physics. This choice, however, comes at a significant cost for both the conventional and advanced tokamaks because of the effects of edge-localized mode's (ELMS). ELMS can produce significant erosion in the divertor and can affect the beta limit and reduced core transport regions needed for advanced tokamak operation. Recent experimental results from DIII-D have demonstrated a new operating regime, the quiescent H-mode regime, which solves these problems. We have achieved quiescent H-mode operation which is ELM-free and yet has good density control. In addition, we have demonstrated that an internal transport barrier can be produced and maintained inside the H-mode edge barrier for, long periods of time (> 3.5 s or >25 energy confinement times TE). By forming the core barrier and then stepping up the input power, we have achieved beta(N)H(89) = 7 for up to 10 times the tau(E) of 160 ms. The beta(N)H(89) values of 7 substantially exceed the value of 4 routinely achieved in standard ELMing H-mode. The key factors in creating the quiescent H-mode operation are neutral beam injection in the direction opposite to the plasma current (counter injection) plus cryopumping to reduce the density. Density control in the quiescent H-mode is possible because of the presence of an edge MHD oscillation, the edge harmonic oscillation, which enhances the edge particle transport while leaving the energy transport unaffected. C1 Gen Atom Co, San Diego, CA 92186 USA. Univ Texas, Austin, TX 78712 USA. Univ Calif Los Angeles, Los Angeles, CA USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Wisconsin, Madison, WI USA. Univ Calif San Diego, San Diego, CA 92103 USA. MIT, Cambridge, MA 02139 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Sandia Natl Labs, Albuquerque, NM USA. RP Burrell, KH (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA. NR 23 TC 86 Z9 86 U1 6 U2 22 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A253 EP A263 AR PII S0741-3335(02)34501-9 DI 10.1088/0741-3335/44/5A/325 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900026 ER PT J AU Bush, CE Maingi, R Bell, MG Bell, RE Fredrickson, ED Gates, DA Kaye, SM Kubota, S Kugel, HW LeBlanc, BP Maqueda, R Medley, S Menard, JE Mueller, D Paoletti, F Paul, S Sabbagh, SA Soukhanovskii, VA Stutman, D Taylor, G Zweben, SJ Johnson, DW Kaita, R Ono, M Peng, YKM Roquemore, AL Synakowski, EJ AF Bush, CE Maingi, R Bell, MG Bell, RE Fredrickson, ED Gates, DA Kaye, SM Kubota, S Kugel, HW LeBlanc, BP Maqueda, R Medley, S Menard, JE Mueller, D Paoletti, F Paul, S Sabbagh, SA Soukhanovskii, VA Stutman, D Taylor, G Zweben, SJ Johnson, DW Kaita, R Ono, M Peng, YKM Roquemore, AL Synakowski, EJ TI Evolution and termination of H-modes in NSTX SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID SPHERICAL-TORUS-EXPERIMENT; PHYSICS; PLASMAS; TOKAMAK AB The dynamic evolution of the first National Spherical Torus Experiment (NSTX) H-modes will be discussed. The H-modes were obtained in lower-single null divertor discharges with various forms of plasma heating. The exact timing of divertor formation and also the NBI power level affects both whether or not the discharge exhibits ELMs and the duration of the ELM-free phase. ELM-free discharges had energy confinement as high as 120 ms, whereas the few discharges with ELMs had confinement times similar to50-70 ms. Buildup of a steep edge density gradient and formation of 'ears' on the density profile were observed within a few ms of the L-H transition, yielding broader density and pressure profiles. The L-H transition was marked by a decrease in edge visible light and simultaneous increase in electron Bernstein wave emission, reflecting a steepening of the edge density gradient. Gas puff imaging of He-I light during the H-mode phase showed rapid formation of a narrow emission layer similar to2 cm wide in the H-mode phase, which returned within 20 microseconds at termination of the H-mode phase to a broader turbulent emission layer. All of the H-modes were terminated by an MHD reconnection event. The first power threshold (P-th) study showed the neutral beam injection power (P-b) component of P-th to be less than or equal to0.84 MW, higher than that predicted by the ITER database scaling. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Columbia Univ, New York, NY USA. Johns Hopkins Univ, Los Alamos, NM 87545 USA. RP Bush, CE (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Sabbagh, Steven/C-7142-2011; Stutman, Dan/P-4048-2015 NR 15 TC 7 Z9 7 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A323 EP A332 AR PII S0741-3335(02)34500-7 DI 10.1088/0741-3335/44/5A/334 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900035 ER PT J AU Greenfield, CM Burrell, KH Doyle, EJ Groebner, RJ West, WP Casper, TA DeBoo, JC Fenzi, C Gohil, P Kinsey, JE Lao, LL Leboeuf, JN Makowski, MA McKee, GR Moyer, RA Murakami, M Pinsker, RI Porter, GD Rettig, CL Rhodes, TL Staebler, GM Stallard, BW Synakowski, EJ Zeng, L AF Greenfield, CM Burrell, KH Doyle, EJ Groebner, RJ West, WP Casper, TA DeBoo, JC Fenzi, C Gohil, P Kinsey, JE Lao, LL Leboeuf, JN Makowski, MA McKee, GR Moyer, RA Murakami, M Pinsker, RI Porter, GD Rettig, CL Rhodes, TL Staebler, GM Stallard, BW Synakowski, EJ Zeng, L CA DIII-D Team TI The quiescent double barrier regime in DIII-D SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID INTERNAL TRANSPORT BARRIER; CENTRAL MAGNETIC SHEAR; FINITE ASPECT RATIO; H-MODE DISCHARGES; D TOKAMAK; HIGH-CONFINEMENT; PLASMAS AB The quiescent double barrier (QDB) regime is a high performance regime recently identified in DIII-D and characterized by a double transport barrier structure (core and edge) that can be maintained for several seconds, often limited only by the pulse length capabilities of the DIII-D hardware. The QDB regime has been sustained for up to 25 tau(E) with fusion performance of up to beta(N)H(89) approximate to 7. The edge barrier is ELM-ftee, but modulated by low frequency MHD activity that allows density control via an external cryopump. The core barrier is similar to those seen in previous internal transport barrier experiments, but is maintained without complete stabilization of turbulence. Instead, the turbulence correlation lengths become very short so as to minimize the transport length scales. The two barriers are separated by a region of high transport that is a consequence of a zero-crossing in the E x B shearing rate. These discharges typically possess highly peaked density profiles. This has several implications: narrow bootstrap current profile, reduced beta limit and increased impurity retention. We will report on studies of each of these issues. C1 Gen Atom Co, San Diego, CA 92186 USA. Univ Calif Los Angeles, Los Angeles, CA USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Wisconsin, Madison, WI USA. Lehigh Univ, Bethlehem, PA USA. Univ Calif San Diego, San Diego, CA 92103 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Greenfield, CM (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA. NR 31 TC 13 Z9 13 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A123 EP A135 AR PII S0741-3335(02)34687-6 DI 10.1088/0741-3335/44/5A/308 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900009 ER PT J AU Groebner, RJ Mahdavi, MA Leonard, AW Osborne, TH Porter, GD AF Groebner, RJ Mahdavi, MA Leonard, AW Osborne, TH Porter, GD TI Role of neutrals in density pedestal formation in DIII-D SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID HIGH MODE PEDESTAL; D TOKAMAK; CONFINEMENT; TRANSPORT; PLASMAS AB An analytic model for the width of the electron density transport barrier shows qualitative and quantitative agreement with systematic data obtained in the DIII-D tokamak. The width of the barrier in H-mode decreases as the pedestal density increases. Moreover, for L-mode and H-mode density profiles with the same pedestal density, the gradients of the barriers are of similar magnitude even though the temperature and pressure gradients are much larger in H-mode. These results are consistent with the hypothesis that neutral penetration provides important physics which helps to set the width of the H-mode barrier for the electron density. C1 Gen Atom Co, San Diego, CA 92186 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Groebner, RJ (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA. NR 17 TC 24 Z9 24 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A265 EP A272 AR PII S0741-3335(02)34502-0 DI 10.1088/0741-3335/44/5A/326 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900027 ER PT J AU Hahm, TS AF Hahm, TS TI Physics behind transport barrier theory and simulations SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID REVERSED-MAGNETIC SHEAR; E X B; RADIAL ELECTRIC-FIELD; HIGH-CONFINEMENT MODE; DIII-D TOKAMAK; L-H TRANSITION; TEMPERATURE-GRADIENT MODE; DRIFT-WAVE TURBULENCE; SELF-ORGANIZED CRITICALITY; EXCITED STRONG TURBULENCE AB The common physics elements behind various transport barrier theories and simulations, and the related experimental observations mainly from tokamaks, are discussed. These include: a hierarchy of the E x B shear effects on turbulence, the role of q profiles, the electron thermal transport mechanism, basic transport barrier dynamics, and the causality of transitions and the possible role of turbulence generated zonal flows. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 161 TC 53 Z9 53 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 EI 1361-6587 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A87 EP A101 AR PII S0741-3335(02)34693-1 DI 10.1088/0741-3335/44/5A/305 PG 15 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900006 ER PT J AU Hiwatari, R Takizuka, T Shaing, KC Houlberg, WA Shirai, H Ogawa, Y AF Hiwatari, R Takizuka, T Shaing, KC Houlberg, WA Shirai, H Ogawa, Y TI Numerical investigation of threshold power by using the Shaing L-H transition model SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID POLOIDAL ROTATION; ELECTRIC-FIELD; TRANSPORT; TOKAMAKS; BIFURCATION; CONFINEMENT; TURBULENCE AB We carry out transport simulations of the L-H transition by the Shaing L-H transition model based on ion orbit losses, and find that the time scale of the L H transition and the time scale for development of the H-mode pedestal are consistent with experimental observations. We also compare the power threshold derived from the Shaing L-H transition model with L-H transition threshold power scaling laws. We find that the magnetic field, B-t, plasma density, n(e), and plasma current, I-p, scaling can be reproduced. C1 Cent Res Inst Elect Power Ind, Komae Res Lab, Komae, Tokyo, Japan. Naka Fus Res Estab, Japan Atom Energy Res Inst, Naka, Ibaraki 2018511, Japan. Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tokyo, High Temp Plasma Ctr, Tokyo 1138656, Japan. RP Hiwatari, R (reprint author), Cent Res Inst Elect Power Ind, Komae Res Lab, Komae, Tokyo, Japan. NR 15 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A445 EP A451 AR PII S0741-3335(02)34438-5 DI 10.1088/0741-3335/44/5A/349 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900050 ER PT J AU Hubbard, AE Carreras, BA Boivin, RL Hughes, JW Marmar, ES Mossessian, D Wukitch, SJ AF Hubbard, AE Carreras, BA Boivin, RL Hughes, JW Marmar, ES Mossessian, D Wukitch, SJ TI Variation of edge gradients with heat flux across L-H and H-L transitions in Alcator C-Mod SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID CONFINEMENT BIFURCATION; TRANSPORT BARRIERS; DYNAMICS; TURBULENCE; TOKAMAKS; PLASMAS AB Local edge electron parameters are measured in the Alcator C-Mod tokamak, during discharges in which input power is continuously ramped up and down, leading to transitions from the low-confinement mode (L-mode) to high-confinement mode (H-mode) mode and back to L-mode. This allows measurement of the accessible portions of the non-monotonic flux-gradient relationship proposed by models of the H-mode as a critical transition. Results are consistent with a dependence of conductivity chi on the temperature gradient, where a very sharp decrease in chi occurs above a critical delT. Other possible flux-gradient relations are also examined, and the data are compared with theoretical formulations. The initial transient of pedestal energy in the first few ms after the L-H transition is also analysed and found to be consistent with a sudden decrease in chi across the pedestal region. C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Hubbard, AE (reprint author), MIT, Plasma Sci & Fus Ctr, NW 17-113 175 Albany St, Cambridge, MA 02139 USA. NR 18 TC 26 Z9 27 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A359 EP A366 AR PII S0741-3335(02)34245-3 DI 10.1088/0741-3335/44/5A/338 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900039 ER PT J AU Sips, ACC Peeters, A Ryter, F Wolf, R Greenwald, M Gohil, P Greenfield, C Kinsey, J Barbato, E Bracco, G Buratti, P Esposito, B Baranov, Y Hellsten, T Aniel, T Becoulet, A Eriksson, L Garbet, X Hoang, T Imbeaux, F Litaudon, X Maget, P Fukuda, T Fujita, T Ide, S Kamada, Y Sakamoto, Y Shirai, H Suzuki, T Takizuka, T Hogeweij, D Esipchuk, Y Ivanov, N Kirneva, N Razumova, K Hahm, T Synakowski, E Doyle, E AF Sips, ACC Peeters, A Ryter, F Wolf, R Greenwald, M Gohil, P Greenfield, C Kinsey, J Barbato, E Bracco, G Buratti, P Esposito, B Baranov, Y Hellsten, T Aniel, T Becoulet, A Eriksson, L Garbet, X Hoang, T Imbeaux, F Litaudon, X Maget, P Fukuda, T Fujita, T Ide, S Kamada, Y Sakamoto, Y Shirai, H Suzuki, T Takizuka, T Hogeweij, D Esipchuk, Y Ivanov, N Kirneva, N Razumova, K Hahm, T Synakowski, E Doyle, E TI An international database for the study of the formation of ITBs in tokamaks SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm AB For the first time, data from eight,different tokamaks have been combined in an international database for internal transport barriers (ITBs). An analysis of the data for the formation of an ITB with dominant ion heating shows a clear dependence of the threshold power on the minor radius and line-averaged electron density for the formation of ion ITBs. The dependence of ITB formation on the toroidal magnetic field is weak. For the formation of ITBs with dominant electron heating, the database is smaller, but for the threshold power a strong increase with plasma size and a weak toroidal field dependence could also be identified. Based on these results, an expression for the power required to form an ITB is given using global variables only. These results give a basis for the analysis of the database using local values (like magnetic shear) and a detailed comparison with theory-based models. C1 Max Planck Inst Plasma Phys, D-85748 Garching, Germany. MIT, Cambridge, MA 02139 USA. Gen Atom Co, San Diego, CA USA. ENEA, Frascati Energy Res Ctr, Frascati, Italy. UKAEA, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. EFDA, CSU, Abingdon OX14 3EA, Oxon, England. EURATOM, CEA Cadarache, St Paul Les Durance, France. JAERI, Naka Fus Res Estab, Naka, Ibaraki, Japan. FOM, Inst Plasma Fys Rijnhuizen, Nieuwegein, Netherlands. IV Kurchatov Atom Energy Inst, Moscow 123182, Russia. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08544 USA. Univ Calif Los Angeles, Los Angeles, CA USA. RP Sips, ACC (reprint author), Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany. RI Peeters, Arthur/A-1281-2009; ANIEL, Thierry/G-8734-2011; Imbeaux, Frederic/A-7614-2013 OI ANIEL, Thierry/0000-0002-2598-9551; NR 5 TC 13 Z9 13 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A391 EP A398 AR PII S0741-3335(02)34253-2 DI 10.1088/0741-3335/44/5A/342 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900043 ER PT J AU Synakowski, EJ Bell, MG Bell, RE Bush, CE Bourdelle, C Darrow, D Dorland, W Ejiri, A Fredrickson, ED Gates, DA Kaye, SM Kubota, S Kugel, HW LeBlanc, BP Maingi, R Maqueda, RJ Menard, JE Mueller, D Rosenberg, A Sabbagh, SA Stutman, D Taylor, G Johnson, DW Kaita, R Ono, M Paoletti, F Peebles, W Peng, YKM Roquemore, AL Skinner, CH Soukhanovskii, VA AF Synakowski, EJ Bell, MG Bell, RE Bush, CE Bourdelle, C Darrow, D Dorland, W Ejiri, A Fredrickson, ED Gates, DA Kaye, SM Kubota, S Kugel, HW LeBlanc, BP Maingi, R Maqueda, RJ Menard, JE Mueller, D Rosenberg, A Sabbagh, SA Stutman, D Taylor, G Johnson, DW Kaita, R Ono, M Paoletti, F Peebles, W Peng, YKM Roquemore, AL Skinner, CH Soukhanovskii, VA CA NSTX Res Team TI Initial studies of core and edge transport of NSTX plasmas SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID SPHERICAL-TORUS-EXPERIMENT; TOKAMAKS; CODES AB Rapidly developing diagnostic, operational, and analysis capability is enabling the first detailed local physics studies to begin in high beta plasmas of the National Spherical Torus Experiment (NSTX). These studies are motivated in part by the observation of energy confinement times in neutral-beam-heated discharges that are favourable with respect to predictions from the ITER-89P scaling expression. For plasmas heated with neutral beam injection (NBI), analysis based on profile measurements suggests that electron heat conduction is the dominant thermal loss channel. Cases where, early analysis indicates that ion thermal conduction may be exceptionally low is motivating studies of possible sources of ion heating not presently accounted for by classical collisional processes. Gyrokinetic microstability studies indicate that long wavelength turbulence with k(theta)rho(i) similar to 0.1-1 may be stable or suppressed by E x B shear in these plasmas, while modes with k(theta)rho(i) similar to 50 may be robust. High harmonic fast wave (HHFW) heating efficiently heats electrons on NSTX, and studies have begun using it to assess transport in the electron channel. Regarding edge transport, H-mode transitions occur with either NBI or HHFW heating. The power required for L- to H-mode transitions far exceeds that expected from empirical ELM-free H-mode scaling laws derived from moderate aspect ratio devices. Finally, initial fluctuation measurements made with two techniques are permitting the first characterizations of edge turbulence. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Tokyo, Tokyo 1130033, Japan. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Columbia Univ, New York, NY 10027 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. RP Synakowski, EJ (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI Sabbagh, Steven/C-7142-2011; Dorland, William/B-4403-2009; Stutman, Dan/P-4048-2015 OI Dorland, William/0000-0003-2915-724X; NR 24 TC 21 Z9 21 U1 1 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A165 EP A173 AR PII S0741-3335(02)34437-3 DI 10.1088/0741-3335/44/5A/313 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900014 ER PT J AU Tala, TJJ Parail, VV Becoulet, A Corrigan, G Heading, DJ Mantsinen, MJ Strand, PI AF Tala, TJJ Parail, VV Becoulet, A Corrigan, G Heading, DJ Mantsinen, MJ Strand, PI CA EFDA-JET Workprogramme TI Comparison of theory-based and semi-empirical transport modelling in JET plasmas with ITBs SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers CY SEP 05-07, 2001 CL TOKI, JAPAN SP Natl Inst Fus Sci, IAEA Tech Comm ID FLOW SHEAR; H-MODE; LHCD AB The theory-based Weiland transport model has been applied to JET discharges with internal transport barriers (ITBs) for the first time. The agreement of the modelling results with the experiments has been found to be comparable with the agreement of the modelling results produced by the semi-empirical Bohm/gyro-Bohm transport model. Weiland model overestimates the width of the ITB and the electron temperature. There is evidence that the density gradient in the Weiland model plays a more important role in governing the ITB formation dynamics for JET discharges than the suppression of turbulence by the omega(ExB) flow shearing rate. C1 VTT Proc, Assoc Euratom Tekes, FIN-02044 Espoo, Finland. Euratom UKAEA Fusion Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. CEA Cadarache, EURATOM Assoc CEA, F-13108 St Paul Les Durance, France. Helsinki Univ Technol, EURATOM Assoc Tekes, FIN-02015 Helsinki, Finland. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Tala, TJJ (reprint author), VTT Proc, Assoc Euratom Tekes, POB 1404, FIN-02044 Espoo, Finland. NR 13 TC 14 Z9 14 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAY PY 2002 VL 44 SU 5A BP A495 EP A500 AR PII S0741-3335(02)34449-X DI 10.1088/0741-3335/44/5A/355 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 708FE UT WOS:000184555900056 ER PT J AU Hathorn, BC Sumpter, BG Barnes, MD Noid, DW AF Hathorn, BC Sumpter, BG Barnes, MD Noid, DW TI Molecular dynamics simulation of polymer nanoparticle collisions: orbital angular momentum effects SO POLYMER LA English DT Article DE angular momentum; scattering trajectories; collisional dynamics ID MACROMOLECULAR SYSTEMS; COMPOSITE MICROPARTICLES; BLEND MICROPARTICLES; OPTICAL DIFFRACTION; THERMAL-PROPERTIES; REFRACTIVE-INDEX; PARTICLES; SIZE AB The collisional dynamics of polymer nanoparticles is investigated using molecular dynamics, with a particular focus on angular momentum effects. Unlike zero impact parameter collisions discussed elsewhere, which are greatly weighted toward sticking collisions, the outcome of collisions with non-zero angular momentum show much greater variability, showing both reactive (where polymer chains are exchanged between particles) and purely scattering trajectories. In the case of inelastic scattering trajectories, the profile for translation to vibration energy transfer is calculated. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. RP Hathorn, BC (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 42 TC 2 Z9 2 U1 0 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD MAY PY 2002 VL 43 IS 10 BP 3115 EP 3121 AR PII S0032-3861(02)00030-7 DI 10.1016/S0032-3861(02)00030-7 PG 7 WC Polymer Science SC Polymer Science GA 539KH UT WOS:000174868800026 ER PT J AU Gegenwart, P Aoki, H Cichorek, T Custers, J Jaime, M Ochiai, A Steglich, F AF Gegenwart, P Aoki, H Cichorek, T Custers, J Jaime, M Ochiai, A Steglich, F TI Magnetotransport of the low-carrier density one-dimensional S=1/2 antiferromagnet Yb4As3 SO PRAMANA-JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT International Symposium on Advances in Superconductivity and Magnetism: Materials, Mechanisms, and Devices (ASMM2D-2001) CY SEP 25-28, 2001 CL MUMBAI, INDIA DE S=1/2 antiferromagnet Yb4As3; magnetotransport; isothermal resistivity; heavy fermion; Shubnikov-de Haas oscillations ID CYCLOTRON-RESONANCE; SYSTEM YB4AS3; EXCITATIONS; BEHAVIOR AB The transport properties of the semimetallic quasi-one-dimensional S = 1/2 antiferromagnet Yb4As3 have been studied by performing low-temperature (T greater than or equal to 0.02 K) and high magnetic-field (B less than or equal to 60 T) measurements of the electrical resistivity rho(T, B). For T greater than or similar to 2 K a 'heavy-fermion'-like behavior Deltarho(T) = AT(2) with huge and nearly field-independent coefficient A approximate to 3 muOmega cm/K-2 is observed, whereas at lower temperatures rho(T) deviates from this behavior and slightly increases to the lowest T. In B > 0 and T less than or similar to 6 K the resistivity shows an anomalous magnetic-hi story dependence together with an unusual relaxation behavior. In the isothermal resistivity Shubnikov-de Haas (SdH) oscillations, arising from a low-density system of mobile As-4p holes, with a frequency of 25 T have been recorded. From the T- and B-dependence of the SdH oscillations an effective carrier mass of (0.275 +/- 0.005)m(0) and a charge-carrier mean-free path of 215 Angstrom are determined. Furthermore, in B greater than or equal to 15 T, the system is near the quantum limit and spin-splitting effects are observed. C1 Max Planck Inst Chem Phys SOlids, D-01187 Dresden, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Tohoku Univ, Ctr Low Temp Sci, Sendai, Miyagi 9808578, Japan. RP Gegenwart, P (reprint author), Max Planck Inst Chem Phys SOlids, D-01187 Dresden, Germany. RI Jaime, Marcelo/F-3791-2015; Custers, Jeroen/D-8011-2016; Gegenwart, Philipp/A-7291-2017 OI Jaime, Marcelo/0000-0001-5360-5220; Custers, Jeroen/0000-0001-6974-1489; NR 21 TC 0 Z9 0 U1 5 U2 6 PU INDIAN ACADEMY SCIENCES PI BANGALORE PA P B 8005 C V RAMAN AVENUE, BANGALORE 560 080, INDIA SN 0304-4289 J9 PRAMANA-J PHYS JI Pramana-J. Phys. PD MAY-JUN PY 2002 VL 58 IS 5-6 BP 715 EP 723 DI 10.1007/s12043-002-0161-x PG 9 WC Physics, Multidisciplinary SC Physics GA 575GC UT WOS:000176937700002 ER PT J AU Eskildsen, MR Abrahamsen, AB Gammel, PL Bishop, DJ Andersen, NH Mortensen, K Canfield, PC AF Eskildsen, MR Abrahamsen, AB Gammel, PL Bishop, DJ Andersen, NH Mortensen, K Canfield, PC TI Flux line lattice symmetries in the borocarbide superconductor LuNi2B2C SO PRAMANA-JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT International Symposium on Advances in Superconductivity and Magnetism: Materials, Mechanisms, and Devices (ASMM2D-2001) CY SEP 25-28, 2001 CL MUMBAI, INDIA DE borocarbide; flux line lattice; symmetry ID STRUCTURAL PHASE-TRANSITION; VORTEX LATTICE; LU(NI1-XCOX)(2)B2C; ERNI2B2C AB We compare the results of small angle neutron scattering on the flux line lattice (FLL) obtained in the borocarbide superconductor LuNi2B2C with the applied field along the c- and a-axes. For H parallel toc the temperature dependence of the FLL structural phase transition from square to hexagonal symmetry was investigated. Above 10 K the transition onset field, H-2(T), rises sharply, bending away from Hc(2) (T) in contradiction to theoretical predictions of the two merging. For H parallel toa a first order FLL reorientation transition is observed at H-tr = 3-3.5 kOe. Below H-tr the FLL nearest neighbor direction is parallel to the b-axis, and above H-tr to the c-axis. This transition cannot be explained using nonlocal corrections to the London model. C1 Univ Geneva, DPMC, CH-1211 Geneva, Switzerland. Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA. Agere Syst, Murray Hill, NJ 07974 USA. Riso Natl Lab, DK-4000 Roskilde, Denmark. RP Eskildsen, MR (reprint author), Univ Geneva, DPMC, 24 Quai E Ansermet, CH-1211 Geneva, Switzerland. RI Mortensen, Kell/A-5066-2009; Eskildsen, Morten/E-7779-2011; Andersen, Niels/A-3872-2012; Canfield, Paul/H-2698-2014 OI Mortensen, Kell/0000-0002-8998-9390; NR 13 TC 1 Z9 1 U1 0 U2 1 PU INDIAN ACADEMY SCIENCES PI BANGALORE PA P B 8005 C V RAMAN AVENUE, BANGALORE 560 080, INDIA SN 0304-4289 J9 PRAMANA-J PHYS JI Pramana-J. Phys. PD MAY-JUN PY 2002 VL 58 IS 5-6 BP 903 EP 905 DI 10.1007/s12043-002-0192-3 PG 3 WC Physics, Multidisciplinary SC Physics GA 575GC UT WOS:000176937700033 ER PT J AU Tiquia, SM Wan, JHC Tam, NFY AF Tiquia, SM Wan, JHC Tam, NFY TI Dynamics of yard trimmings composting as determined by dehydrogenase activity, ATP content, arginine ammonification, and nitrification potential SO PROCESS BIOCHEMISTRY LA English DT Article DE microbial activities; yard trimmings; decomposition; enzyme activities; windrow composting ID SOIL MICROBIAL BIOMASS; LITTER AB Microbial activities, numbers, and biomass are key parameters that can be used to elucidate the dynamics of the composting process. In the present study, four different biochemical parameters (dehydrogenase activity, ATP content, arginine ammonification, and nitrification potential) were measured (1) to monitor the dynamics of yard trimmings composting; and (2) to relate these parameters to changes in microbial numbers, physico-chemical properties, and maturity (stability) of yard trimmings compost. The initial yard trimmings was a mixture of leaves, grass clippings, and shredded bark (1:1:1 v/v). Three windrows, each having a dimension of 1.5 m (height) x 4 m (length) x 0.6 m in (width) were established. The temperature profile showed a rapid self-heating of the compost mass from ambient temperature of 20 to 70 degreesC in the first 24 h of composting. This thermophilic temperature was sustained until day 14 and then dropped to ambient level towards the end of composting (day 63). The maturation of yard trimmings compost was accompanied by a decline in pile temperature to ambient level, increases in bulk density, (NO3- + NO2-)-N, population sizes of actinomycetes and fungi, drop in C:N ratio to 20: 1, and decreases and stabilisation of biochemical properties (dehydrogenase activity, ATP content, and nitrification potential) to low levels. Dehydrogenase activity, ATP content, and nitrification potential depended on the changes in C and N content during composting. These parameters were correlated with the populations of either total aerobic heterotrophs or actinomycetes, indicating the usefulness of these parameters as indicators of microbial activity and dynamics of the composting process. Arginine ammonification was dependent on the change of neither C nor N. It also did not correlate with microbial numbers, suggesting that this parameter may not be suitable for evaluating microbial activity and dynamics of yard trimmings composting. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 City Univ Hong Kong, Dept Biol & Chem, Kowloon, Hong Kong, Peoples R China. Hong Kong Baptist Univ, Dept Biol, Kowloon, Hong Kong, Peoples R China. Ohio State Univ, Ohio Agr Res & Dev Ctr, Dept Food Agr & Biol Engn, Wooster, OH 44691 USA. RP Tiquia, SM (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. EM tiquias@ornl.gov OI TAM, Nora Fung-yee/0000-0003-2205-8775 NR 40 TC 39 Z9 45 U1 3 U2 18 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1359-5113 J9 PROCESS BIOCHEM JI Process Biochem. PD MAY PY 2002 VL 37 IS 10 BP 1057 EP 1065 AR PII S0032-9592(01)00317-X DI 10.1016/S0032-9592(01)00317-X PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Engineering, Chemical SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Engineering GA 542HW UT WOS:000175038300002 ER PT J AU Coutts, TJ Emery, KA Ward, JS AF Coutts, TJ Emery, KA Ward, JS TI Modeled performance of polycrystalline thin-film tandem solar cells SO PROGRESS IN PHOTOVOLTAICS LA English DT Article AB The optimum bandgaps for two-terminal monolithic multijunction devices have typically been studied under a fixed set of environmental conditions, using ideal device models. This study examines the effects of a realistic dark-current for typical state-of-the-art thin-film polycrystalline cells on the optimum energy gap for a series-connected two-junction cell. The optimum energy gaps are compared for a series-connected tandem cell under standard reference conditions and the energy produced for five different reference days where the temperature, spectral irradiance and total irradiance varied. The optimum bandgaps were found to be 1.72 +/- 0.02 eV for the top cell and 1.14 +/- 0.02 eV for the bottom cell. Published in 2002 by John Wiley Sons, Ltd. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Emery, KA (reprint author), Natl Renewable Energy Lab, 1617 Cole Bd, Golden, CO 80401 USA. NR 20 TC 61 Z9 62 U1 0 U2 10 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD MAY PY 2002 VL 10 IS 3 BP 195 EP 203 DI 10.1002/pip.419 PG 9 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 544PW UT WOS:000175170000003 ER PT J AU Marion, B AF Marion, B TI A method for modeling the current-voltage curve of a PV module for outdoor conditions SO PROGRESS IN PHOTOVOLTAICS LA English DT Article AB A method has been developed for modeling the current-voltage curve of a photovoltaic (PV) module for outdoor conditions. An indoor characterization procedure determines a PV module's temperature and irradiance correction factors, which are used in conjunction with equations to translate a reference curve to outdoor conditions of PV module temperature and irradiance. A PV technology's spectral response characteristics are accommodated in the equation for irradiance. The modeled and measured energy is compared for a one-year period for seven PV modules of different technologies. The results validate the method's use for modeling the hourly performance of PV modules, and for modeling daily energy production for PV module energy rating purposes. Published in 2002 by John Wiley Sons, Ltd. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Marion, B (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 12 TC 51 Z9 53 U1 0 U2 11 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD MAY PY 2002 VL 10 IS 3 BP 205 EP 214 DI 10.1002/pip.403 PG 10 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 544PW UT WOS:000175170000004 ER PT J AU Smith, RD Anderson, GA Lipton, MS Pasa-Tolic, L Shen, YF Conrads, TP Veenstra, TD Udseth, HR AF Smith, RD Anderson, GA Lipton, MS Pasa-Tolic, L Shen, YF Conrads, TP Veenstra, TD Udseth, HR TI An accurate mass tag strategy for quantitative and high-throughput proteome measurements SO PROTEOMICS LA English DT Article DE accurate mass tag; Deinococcus radiodurans; Fourier transform ion cyclotron resonance ID ION-CYCLOTRON RESONANCE; DEINOCOCCUS-RADIODURANS; SEQUENCE DATABASES; SACCHAROMYCES-CEREVISIAE; POLYACRYLAMIDE GELS; 2-DIMENSIONAL GELS; YEAST PROTEOME; MESSENGER-RNA; PROTEINS; IDENTIFICATION AB We describe and demonstrate a global strategy that extends the sensitivity, dynamic range, comprehensiveness, and throughput of proteomic measurements based upon the use of peptide "accurate mass tags" (AMTs) produced by global protein enzymatic digestion. The two-stage strategy exploits Fourier transform-ion cyclotron resonance (FF-ICR) mass spectrometry to validate peptide AMTs for a specific organism, tissue or cell type from "potential mass tags" identified using conventional tandem mass spectrometry (MS/MS) methods, providing greater confidence in identifications as well as the basis for subsequent measurements without the need for MS/MS, and thus with greater sensitivity and increased throughput. A single high resolution capillary liquid chromatography separation combined with high sensitivity, high resolution and accurate FT-ICR measurements has been shown capable of characterizing peptide mixtures of significantly more than 10(5) components with mass accuracies of <1 ppm, sufficient for broad protein identification using AMTs. Other attractions of the approach include the broad and relatively unbiased proteome coverage, the capability for exploiting stable isotope labeling methods to realize high precision for relative protein abundance measurements, and the projected potential for study of mammalian proteomes when combined with additional sample fractionation. Using this strategy, in our first application we have been able to identify AMTs for >60% of the potentially expressed proteins in the organism Deinococcus radiodurans. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Environm & Mol Sci Lab, MSIN,K8-98,POB 999, Richland, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 FU NCI NIH HHS [CA81654]; NCRR NIH HHS [RR12365]; NINDS NIH HHS [NS39617] NR 51 TC 331 Z9 339 U1 2 U2 32 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD MAY PY 2002 VL 2 IS 5 BP 513 EP 523 DI 10.1002/1615-9861(200205)2:5<513::AID-PROT513>3.0.CO;2-W PG 11 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 550XF UT WOS:000175529800004 PM 11987125 ER PT J AU Calder, N AF Calder, N TI Database reaches breakthrough storage record SO R&D MAGAZINE LA English DT Article C1 SLAC, Directors Off, Menlo Pk, CA 94025 USA. RP Calder, N (reprint author), SLAC, Directors Off, Menlo Pk, CA 94025 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CAHNERS-DENVER PUBLISHING CO PI OAK BROOK PA 2000 CLEARWATER DR, OAK BROOK, IL 60523-8809 USA SN 0746-9179 J9 R&D MAG JI R D Mag. PD MAY PY 2002 VL 44 IS 5 BP 40 EP 41 PG 2 WC Engineering, Industrial; Multidisciplinary Sciences SC Engineering; Science & Technology - Other Topics GA 553UH UT WOS:000175693500026 ER PT J AU Gardner, SN Tucker, JD AF Gardner, SN Tucker, JD TI The cellular lethality of radiation-induced chromosome translocations in human lymphocytes SO RADIATION RESEARCH LA English DT Article ID RETROSPECTIVE BIOLOGICAL DOSIMETRY; IN-SITU-HYBRIDIZATION; DNA-REPAIR GENES; PERIPHERAL-BLOOD; FISH TRANSLOCATIONS; CYTOGENETIC DAMAGE; IONIZING-RADIATION; ABERRATIONS; PERSISTENCE; IRRADIATION AB Recent evidence has shown that translocation frequencies decline over time. This phenomenon might be explained by the co-occurrence of translocations in cells that also contain dicentrics, in which case translocations would be eliminated as a by-product of selection against dicentrics. Alternatively, a fraction of translocations may themselves be lethal. Here we describe our initial approaches to develop mathematical models to test whether the decline in translocation frequencies results from the first, the second, or a combination of these two possibilities. The models assumed that all chromosome exchanges were simple, i.e., were comprised of dicentries as well as one-way and two-way translocations. Complex aberrations (three or more breaks in two or more chromosomes) were not modeled, nor were fragments or intrachromosomal exchanges (rings, inversions). We tested the models using Monte Carlo simulations, and then we fitted the models to data describing chromosome aberration frequencies induced by a single acute in vitro exposure to Cs-137 gamma rays in human peripheral blood lymphocytes from two donors. Chromosome painting was used to enumerate translocations and dicentrics from 2 to 7 days after exposure. Our results indicate that in donor no. 2, the decline in translocation frequencies occurs as a by-product of selection against dicentrics. However, in donor no. 1, whose cells appeared more radiosensitive than cells from donor no. 2, up to 40% of the one-way translocations may themselves be lethal at high doses, although calculations indicate that two-way translocations do not cause lymphocyte mortality. Individual variation in the probability that translocations are lethal to cells appears to be important, and one-way translocations appear to be lethal more often than two-way translocations. Within the limits of these models, these findings indicate that both postulated mechanisms, i.e. inherent lethality and selection against dicentrics in the same cells, contribute to the loss of both one-way and two-way translocations. (C) 2002 by Radiation Research Society. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. RP Tucker, JD (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, L-448,7000 E Ave, Livermore, CA 94551 USA. FU NCI NIH HHS [P01 CA59431] NR 32 TC 25 Z9 27 U1 1 U2 2 PU RADIATION RESEARCH SOC PI OAK BROOK PA 820 JORIE BOULEVARD, OAK BROOK, IL 60523 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD MAY PY 2002 VL 157 IS 5 BP 539 EP 552 DI 10.1667/0033-7587(2002)157[0539:TCLORI]2.0.CO;2 PG 14 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 549PE UT WOS:000175452500007 PM 11966320 ER PT J AU Nimura, Y Ismail, SM Kurimas, A Chen, DJ Stevens, CW AF Nimura, Y Ismail, SM Kurimas, A Chen, DJ Stevens, CW TI DNA-PK and ATM are required for radiation-enhanced integration SO RADIATION RESEARCH LA English DT Article ID DEPENDENT PROTEIN-KINASE; ATAXIA-TELANGIECTASIA GENE; DOUBLE-STRAND BREAKS; RNA-POLYMERASE-II; IONIZING-RADIATION; CATALYTIC SUBUNIT; INDUCED PHOSPHORYLATION; TRANSFER EFFICIENCY; MAMMALIAN-CELLS; RECOMBINATION AB Ionizing radiation is known to improve transfection of exogenous DNA, a. process we have termed radiation-enhanced integration. Previous observations have demonstrated that Ku proteins are critical for radiation-enhanced integration. Since Ku proteins form the DNA-binding domain of DNA-PK and since DNA-PK is important in nonhomologous DNA end joining, it was hypothesized that DNA-PK function might be important for radiation-enhanced integration. The ATM protein has been shown to be important in the recognition of a variety of types of DNA damage and to associate with DNA-PK under certain conditions. It was thus hypothesized that ATM might also play a role in radiation-enhanced integration. To test these hypotheses, radiation-enhanced integration was measured in hamster cells that are defective in the catalytic subunit of DNA-PK and in human cells containing mutant ATM. Radiation-enhanced integration was not detected in any of the cell lines with mutant PRKDC (also known as DNA-PKcs), but it was present in cells of the same lineage with wild-type PRKDC. Radiation-enhanced integration was defective in cells lacking kinase activation. ATM-deficient cell lines also showed defective radiation-enhanced integration. These data demonstrate that DNA-PK and ATM must both be active for radiation-enhanced integration to be observed. (C) 2002 by Radiation Research Society. C1 Univ Texas, MD Anderson Canc Ctr, Dept Radiat Oncol, Houston, TX 77030 USA. Univ Texas, MD Anderson Canc Ctr, Dept Expt Radiat Oncol, Houston, TX 77030 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Stevens, CW (reprint author), Univ Texas, MD Anderson Canc Ctr, Dept Radiat Oncol, 1515 Holcombe Blvd, Houston, TX 77030 USA. FU NCI NIH HHS [CA74046, CA 50519] NR 36 TC 5 Z9 7 U1 0 U2 2 PU RADIATION RESEARCH SOC PI OAK BROOK PA 820 JORIE BOULEVARD, OAK BROOK, IL 60523 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD MAY PY 2002 VL 157 IS 5 BP 562 EP 567 DI 10.1667/0033-7587(2002)157[0562:DPAAAR]2.0.CO;2 PG 6 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 549PE UT WOS:000175452500009 PM 11966322 ER PT J AU Tierney, HE Jacobson, AR Roussel-Dupre, R Beasley, WH AF Tierney, HE Jacobson, AR Roussel-Dupre, R Beasley, WH TI Transionospheric pulse pairs originating in maritime, continental, and coastal thunderstorms: Pulse energy ratios SO RADIO SCIENCE LA English DT Article DE FORTE; VHF radio; lightning; reflection ID LIGHTNING DETECTION NETWORK; FORTE OBSERVATIONS; PHENOMENOLOGY; EMISSIONS; DISCHARGES; RADIATION; SATELLITE; WATER; VHF AB [1] We examine the ratio of energy in the second pulse to energy in the first pulse for 2467 transionospheric pulse pairs (TIPPs). The TIPPs examined here have been attributed to thunderstorms occurring over maritime, continental, and coastal regions near the continental United States. The mean values of the energy ratios are found to be 0.39 +/- 0.27 for continental TIPPs and 0.94 +/- 0.62 for maritime TIPPs. The energy ratio values for the coastal TIPPs exhibit a bimodal distribution representative of both the continental and the maritime populations. Previous observational evidence has shown that the second pulse of a TIPP is the surface-reflected signal from the same source as the first pulse. We compare the observed pulse energy ratios to the reflection coefficients of soil and seawater given by the Fresnel equations. The average values of the reflection coefficients for sources with vertical plane and horizontal plane polarization are consistent with the data. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA. Univ Oklahoma, Sch Meteorol, Norman, OK 73019 USA. RP Tierney, HE (reprint author), Los Alamos Natl Lab, POB 1663,EES-8,MS D401, Los Alamos, NM 87545 USA. EM htierney@lanl.gov; ajacobson@lanl.gov; bobrd@vega.lanl.gov; wbeasley@ou.edu NR 17 TC 9 Z9 9 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0048-6604 EI 1944-799X J9 RADIO SCI JI Radio Sci. PD MAY-JUN PY 2002 VL 37 IS 3 AR 1039 DI 10.1029/2001RS002506 PG 7 WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications GA 610ER UT WOS:000178948200009 ER PT J AU Carr, R Vempala, S AF Carr, R Vempala, S TI Randomized metarounding SO RANDOM STRUCTURES & ALGORITHMS LA English DT Article ID APPROXIMATION AB Let P be a linear relaxation of an integer polytope Z such that the integrality gap of P with respect to Z is at most r, as verified by a polytime heuristic A, which on any positive cost function c returns an integer solution (an extreme point of Z) whose cost is at most r times the optimal cost over P. Then for any point x* in P (a fractional solution), rx* dominates some convex combination of extreme points of Z. A constructive version of this theorem is presented here, with applications to approximation algorithms, and can be viewed as a generalization of randomized rounding. (C) 2002 Wiley Periodicals, Inc.*. C1 MIT, Dept Math, Cambridge, MA 02139 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Vempala, S (reprint author), MIT, Dept Math, Cambridge, MA 02139 USA. NR 8 TC 30 Z9 30 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1042-9832 J9 RANDOM STRUCT ALGOR JI Random Struct. Algorithms PD MAY PY 2002 VL 20 IS 3 BP 343 EP 352 DI 10.1002/rsa.10033 PG 10 WC Computer Science, Software Engineering; Mathematics, Applied; Mathematics SC Computer Science; Mathematics GA 548AP UT WOS:000175365900004 ER PT J AU Konjevod, G Ravi, R Srinivasan, A AF Konjevod, G Ravi, R Srinivasan, A TI Approximation algorithms for the covering Steiner problem SO RANDOM STRUCTURES & ALGORITHMS LA English DT Article ID TREES AB The covering Steiner problem is a generalization of both the k-MST and the group Steiner problems: given an edge-weighted graph, with subsets of vertices called the groups, and a nonnegative integer value (called the requirement) for each group, the problem is to find a minimum-weight tree spanning at least the required number of vertices of every group. When all requirements are equal to 1, this becomes the cup Steiner problem, while if there is only one group which contains all vertices of the graph the problem reduces to k-MST with k equal to the requirement of this unique group. We discuss two different (but equivalent) linear relaxations of the problem for the case when the given graph is a tree and construct polylogarithmic approximation algorithms based on randomized LP rounding of these relaxations. By using a probabilistic approximation of general metrics by tree metrics due to Bartal, our algorithms also solve the covering Steiner problem on general graphs with a further polylogarithmic worsening in the approximation ratio. (C) 2002 Wiley Periodicals, Inc. C1 Arizona State Univ, Dept Comp Sci & Engn, Tempe, AZ 85287 USA. Carnegie Mellon Univ, GSIA, Pittsburgh, PA 15213 USA. Univ Maryland, Inst Adv Comp Studies, College Pk, MD 20742 USA. Dept Comp Sci, College Pk, MD 20742 USA. Carnegie Mellon Univ, Dept Math Sci, Pittsburgh, PA 15213 USA. IBM SRC, New Delhi, India. Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Arizona State Univ, Dept Comp Sci & Engn, Tempe, AZ 85287 USA. EM goram@asu.edu; ravi@cmu.edu; srin@cs.umd.edu OI Ravi, R/0000-0001-7603-1207 NR 20 TC 19 Z9 20 U1 0 U2 0 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 1042-9832 EI 1098-2418 J9 RANDOM STRUCT ALGOR JI Random Struct. Algorithms PD MAY PY 2002 VL 20 IS 3 BP 465 EP 482 DI 10.1002/rsa.10038 PG 18 WC Computer Science, Software Engineering; Mathematics, Applied; Mathematics SC Computer Science; Mathematics GA 548AP UT WOS:000175365900009 ER PT J AU Mildner, DFR Chen-Mayer, HH Gibson, WM Gnaupel-Herold, T Miller, ME Prask, HJ Schultz, AJ Vitt, R Youngman, R AF Mildner, DFR Chen-Mayer, HH Gibson, WM Gnaupel-Herold, T Miller, ME Prask, HJ Schultz, AJ Vitt, R Youngman, R TI A monolithic polycapillary focusing optic for polychromatic neutron diffraction applications SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID CAPILLARY OPTICS; CRYSTALLOGRAPHY AB We have conducted measurements at five different thermal neutron wavelengths to determine the transmission characteristics of a tapered monolithic focusing lens with a focal length of 100 mm, suitable for time-of-flight diffraction. Both the width of the focused beam and the intensity gain of the optic increase as a function of wavelength. We have performed similar measurements on a polychromatic beam on a pulsed neutron source, where the results are subject to background from short wavelength neutrons. The use of a beryllium filter shows the increased effective gain for the longer wavelengths at the expense of an increased focused beam width by a factor of 2. (C) 2002 American Institute of Physics. C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Xray Opt Syst Inc, Albany, NY 12203 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Mildner, DFR (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. OI Gnaupel-Herold, Thomas/0000-0002-8287-5091 NR 18 TC 8 Z9 8 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAY PY 2002 VL 73 IS 5 BP 1985 EP 1993 DI 10.1063/1.1470236 PG 9 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 545AN UT WOS:000175194200001 ER PT J AU Thomae, R Gough, R Keller, R Leung, KN Schenkel, T Aleksandrov, A Stockli, M Welton, R AF Thomae, R Gough, R Keller, R Leung, KN Schenkel, T Aleksandrov, A Stockli, M Welton, R TI Beam measurements on the H- source and low energy beam transport system for the Spallation Neutron Source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB The ion source and low energy beam transport (LEBT) section of the front-end systems presently being built at Lawrence Berkeley National Laboratory are required to provide 50 mA of H- beam current at a 6% duty factor (1 ms pulses at 60 Hz) with a normalized root mean square emittance of less than 0.20 pi mm mrad. Experimental results, including emittance, chopping, and steering measurements, on the performance of the ion source and LEBT system operated at the beam parameters demanded will be discussed. (C) 2002 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Thomae, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 5 TC 2 Z9 3 U1 1 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAY PY 2002 VL 73 IS 5 BP 2016 EP 2019 DI 10.1063/1.1470238 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 545AN UT WOS:000175194200005 ER PT J AU Lee, HJ Moon, SH Tsai, SP AF Lee, HJ Moon, SH Tsai, SP TI Effects of pulsed electric fields on membrane fouling in electrodialysis of NaCl solution containing humate SO SEPARATION AND PURIFICATION TECHNOLOGY LA English DT Article DE pulsed electric field; electrodialysis; fouling index; fouling; exchange membranes AB Fouling of ion exchange membranes is one of the major problems during electrodialysis (ED) operation. Effects of pulsed electric fields on membrane fouling in electrodialysis were studied with NaCl solution containing humate. The performances were evaluated using various frequencies of electric pulses. In desalting of NaCl solution with humate as a foulant, the optimum frequency was found to be 100 Hz in terms of conductivity and cell resistance changes. A membrane fouling index for electrodialysis (EDMFI) is proposed as a quantitative measure of the membrane fouling tendency of electrodialysis processes. (C) 2002 Elsevier Science BY. All rights reserved. C1 Kwangju Inst Sci & Technol, K JIST, Dept Environm Sci & Engn, Buk Gu, Gwangju 500712, South Korea. Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA. RP Moon, SH (reprint author), Kwangju Inst Sci & Technol, K JIST, Dept Environm Sci & Engn, Buk Gu, 1 Oryong Dong, Gwangju 500712, South Korea. NR 20 TC 67 Z9 71 U1 2 U2 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1383-5866 J9 SEP PURIF TECHNOL JI Sep. Purif. Technol. PD MAY 1 PY 2002 VL 27 IS 2 BP 89 EP 95 AR PII S1383-5866(01)00167-8 DI 10.1016/S1383-5866(01)00167-8 PG 7 WC Engineering, Chemical SC Engineering GA 549MV UT WOS:000175448700001 ER PT J AU Glover, LJ Eick, MJ Brady, PV AF Glover, LJ Eick, MJ Brady, PV TI Desorption kinetics of cadmimn(2+) and lead(2+) from goethite: Influence of time and organic acids SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID SURFACE COMPLEXATION; COBALT DESORPTION; SORPTION; CADMIUM; OXIDES; IRON; PRECIPITATION; ADSORPTION; KAOLINITE; SOILS AB It is generally accepted that trace metal concentrations in soil solution are primarily controlled by sorption and desorption reactions at the particle-water interface. While numerous studies have been conducted to understand adsorption of these metals to soil minerals, less is known about long-term adsorption-desorption processes. The objective of this study was to examine the influence of residence time and organic acids on the desorption of Pb2+ and Cd2+ from goethite. Adsorption experiments were conducted at pH 6.0 for 1 wk (short-term) and 20 wk (long-term). Lead adsorption was nearly complete after 4 h, with very little additional sorption occurring during a 20-wk period. In contrast, Cd showed a continuous slight increase in the remaining adsorption. Desorption experiments were conducted at pH 4.5 and desorption kinetics for Pb2+ and Cd2+ were slow compared with the sorption reaction. Trace metal removal from the goethite surface was not completely reversible during an 8-h desorption period for all of the experiments, except for short-term Cd2+ in the presence of salicylate. For all experiments except long-term Ph2+ desorption, the quantity of metal desorbed from goethite followed the order salicylate > NaNO3 > oxalate. It is postulated that the greater effectiveness of salicylate compared with oxalate was related to the ability of oxalate to form bridging or ternary complexes between the metal and the goethite surface. For all experiments except Ph2+ sorption in the presence of oxalate a greater quantity of metal was desorbed for the short-term compared with the long-term experiment. However, these results were only statistically significant for Ph2+ in the presence of salicylate. These results suggest that residence time effects observed by many researchers are much less prevalent at low pH values, and hence natural or anthropogenic reduction in soil pH may reduce the ability of the soil to naturally sequester trace metal cations over time. C1 Virginia Polytech Inst & State Univ, Dep Crop & Soil Environm Sci, Blacksburg, VA 24061 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Eick, MJ (reprint author), Virginia Polytech Inst & State Univ, Dep Crop & Soil Environm Sci, 236 Smyth Hall, Blacksburg, VA 24061 USA. NR 25 TC 55 Z9 57 U1 2 U2 14 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 0361-5995 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD MAY-JUN PY 2002 VL 66 IS 3 BP 797 EP 804 PG 8 WC Soil Science SC Agriculture GA 546RU UT WOS:000175288300014 ER PT J AU Brosha, EL Mukundan, R Brown, DR Garzon, FH Visser, JH AF Brosha, EL Mukundan, R Brown, DR Garzon, FH Visser, JH TI Development of ceramic mixed potential sensors for automotive applications SO SOLID STATE IONICS LA English DT Article DE mixed potential sensors; on-board diagnostics; CO sensors; hydrocarbon sensors ID ZIRCONIA OXYGEN SENSOR; STABILIZED ZIRCONIA; CARBON-MONOXIDE; OXIDE ELECTRODE; HYDROGEN SENSOR; BEHAVIOR AB Mixed potential sensors that utilize Ce0.8Gd0.2O1.9 electrolytes and patterned dense 1-mum thick LaMnO3 thin films were studied at 600degreesC and 1%O-2. The response to C3H6 and CO of two different sensor configurations were studied continuously for 1000 h versus an air reference. Although two different current collection schemes and two different metal oxide electrode geometries were employed, the magnitude of the mixed potential generated by both sensors was remarkably similar. From previous work with Au-ceria-Pt mixed potential sensors, this behavior is attributed to precisely controlling the metal oxide electrode/solid electrolyte interface unlike the undefined interface produced when Au electrodes are used. Although doped ceria is not a suitable electrolyte for automotive exhaust gas applications, this work serves to illustrate design goals for zirconia-based sensors. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Elect & Electrochem Mat Grp, Los Alamos, NM 87545 USA. Ford Res Lab, Dearborn, MI 48121 USA. RP Brosha, EL (reprint author), Los Alamos Natl Lab, Elect & Electrochem Mat Grp, POB 1663,MST-1,Mail Stop D429, Los Alamos, NM 87545 USA. NR 21 TC 76 Z9 77 U1 2 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD MAY PY 2002 VL 148 IS 1-2 BP 61 EP 69 AR PII S0167-2738(02)00103-0 DI 10.1016/S0167-2738(02)00103-0 PG 9 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 558RL UT WOS:000175980300007 ER PT J AU Hamakawa, S Li, L Li, A Iglesia, E AF Hamakawa, S Li, L Li, A Iglesia, E TI Synthesis and hydrogen permeation properties of membranes based on dense SrCe0.95Yb0.05O3-alpha thin films SO SOLID STATE IONICS LA English DT Article DE SrCe0.95Yb0.05O3-alpha; hydrogen permeation; thin film ID CONDUCTORS; OXYGEN AB Dense SrZr0.95Y0.05O3-chi and SrCe0.95Yb0.05O3-chi thin films with perovskite structure were prepared on porous SrZr0.95Y0.05O3-chi substrates by spin coating colloidal suspensions of powders prepared by combustion methods. Porous substrates were prepared by treating carbon/SrZr0.95Y0.05O3-chi composites in air at 1273-1573 K in order to combust the carbon and partially sinter the resulting porous oxide. This procedure led to strong porous solids with a high gas permeability. Matching the shrinkage of the porous substrate and of the thin film by this pre-sintering of the porous substrate led to thin films free of fissures and other defects. Thin films prepared by these methods did not transport He at ambient temperature or N-2 at 900- 1000 K. H-2 permeation rates through SrCe0.95Yb0.05O3-chi thin films at 950 K were as high as 500 times larger than on 1-mm disks and reached values of 6 X 10(-4) mol H-2/cm(2) min for 2 mum films. H-2 permeation rates were proportional to the inverse of the membrane thickness, indicating that permeation in SrCe9.95Yb0.05O3-chi thin films is controlled by bulk diffusion and not by H-2 dissociative chemisorption or by boundary layer transport, even for 2 mum films. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. EO Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Iglesia, E (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RI Iglesia, Enrique/D-9551-2017 OI Iglesia, Enrique/0000-0003-4109-1001 NR 18 TC 66 Z9 68 U1 0 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD MAY PY 2002 VL 148 IS 1-2 BP 71 EP 81 AR PII S0167-2738(02)00047-4 DI 10.1016/S0167-2738(02)00047-4 PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 558RL UT WOS:000175980300008 ER PT J AU Chen, LH Claus, H Paulikas, AP Zheng, H Veal, BW AF Chen, LH Claus, H Paulikas, AP Zheng, H Veal, BW TI Joining of melt-textured YBCO: a direct contact method SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article; Proceedings Paper CT 3rd International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials CY JUL 11-13, 2001 CL SEATTLE, WASHINGTON ID GRAIN-BOUNDARIES; YBA2CU3OX AB We report a method for making weld joints, capable of transmitting high supercurrent densities, in bulk samples of melt-textured YBCO. The joining procedure is carried out in a flowing atmosphere of O-2 to eliminate problems associated with nitrogen gas, which can become trapped in the joint. No filler or fluxing material is used. The method can be used to join large areas (several cm(2)) that are capable of transmitting supercurrent densities exceeding 10(4) A cm(-2). C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Illinois, Dept Phys, Chicago, IL 60607 USA. RP Chen, LH (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 11 TC 22 Z9 24 U1 2 U2 10 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD MAY PY 2002 VL 15 IS 5 BP 672 EP 674 AR PII S0953-2048(02)33949-6 DI 10.1088/0953-2048/15/5/306 PG 3 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 560PT UT WOS:000176091000007 ER PT J AU Hull, JR Komori, M AF Hull, JR Komori, M TI High levitation pressures with cage-cooled superconductors SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article; Proceedings Paper CT 3rd International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials CY JUL 11-13, 2001 CL SEATTLE, WASHINGTON AB We present an analysis of and experimental results from a levitational system comprising a stationary, bulk high-temperature superconductor (HTS) and a levitated component (rotor) that consists of a cylindrical permanent magnet surrounded by an annular HTS. The rotor is cooled below the critical temperature of the HTS while surrounded by a ferromagnetic cage. When the ferromagnetic cage is removed, the flux from the permanent magnet is essentially excluded from the interior of the HTS. When brought into proximity with the HTS stator, the cage-cooled rotor experiences a levitational force. The levitational force may be calculated by applying magnetic circuit theory. Such calculations indicate that for a sufficiently high critical current density, the levitational pressure may exceed that between the permanent magnet and its mirror image. We constructed a rotor from an NdFeB permanent magnet and YBCO bulk HTS with a critical current density of approximate to5 kA cm(-2). A soft ferromagnetic steel cage was constructed in segments. The critical current density of the stator HTS was also approximate to5 kA cm(-2). Experimental results obtained with the cage-cooled rotor and stationary HTS show a significant increase in force over that of an equivalent PM rotor and stationary HTS. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Kyushu Inst Technol, Dept Mech Syst Engn, Iizuka, Fukuoka 8208502, Japan. RP Hull, JR (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD MAY PY 2002 VL 15 IS 5 BP 763 EP 768 AR PII S0953-2048(02)34135-6 DI 10.1088/0953-2048/15/5/324 PG 6 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 560PT UT WOS:000176091000025 ER PT J AU Wolsky, AM AF Wolsky, AM TI An overview of flywheel energy systems with HTS bearings SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article; Proceedings Paper CT 3rd International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials CY JUL 11-13, 2001 CL SEATTLE, WASHINGTON AB Passive magnetic bearings Incorporating permanent magnets and ReBaCuO, together with carbon fibre, offer the possibility of increasing the stored, volumetric energy density of FES and unprecedentedly low idling loss of FES. Its stored energy need only satisfy customers' needs for the time it takes to bring on conventional 'back-up'. The FES itself must come up to power quickly enough to avoid any disruption in the customer's operation (e.g., continuous industrial processes involving fragile materials, for example paper forming). Such customers do not care about the price of electricity nearly as much as they care about not ruining their product, damaging their machines or having 'clean ups' that stop or slow output. Firms that engage in electronic commerce and/or telecommunications also value uninterruptible power. Another set of potential customers (construction, electric railroads) may wish to avoid fluctuations in their electrical supply or they may wish to avoid causing harm to others who may hold them liable for poor power quality. Finally, real time prices (e.g., every 15 s) and real time commands, disseminated via internet, and distributed storage might enable reduced system generation costs. Generators and FES makers would have to cooperate to make this feasible. Now, the central techno-economic challenge is to build a high-power, low-loss motor generator that reaches full power in a very short time. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Wolsky, AM (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 0 TC 8 Z9 12 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD MAY PY 2002 VL 15 IS 5 BP 836 EP 837 AR PII S0953-2048(02)33935-6 DI 10.1088/0953-2048/15/5/339 PG 2 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 560PT UT WOS:000176091000040 ER PT J AU Day, AC Strasik, M McCrary, KE Johnson, PE Gabrys, JW Schindler, JR Hawkins, RA Carlson, DL Higgins, MD Hull, JR AF Day, AC Strasik, M McCrary, KE Johnson, PE Gabrys, JW Schindler, JR Hawkins, RA Carlson, DL Higgins, MD Hull, JR TI Design and testing of the HTS bearing for a 10 kWh flywheel system SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article; Proceedings Paper CT 3rd International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials CY JUL 11-13, 2001 CL SEATTLE, WASHINGTON AB Flywheels are of interest for a wide range of energy storage applications, from Support of renewable resources to distributed power applications and uninterruptible power systems (UPS) (Day et al 2000 Proc. EESAT 2000 (Orlando, FL, Sept. 2000)). The use of high-temperature superconducting (HTS) bearings for such systems has significant advantages for applications requiring large amounts of energy to be stored with low parasitic losses and with minimal system maintenance. As flywheel systems increase in size, it becomes a significant challenge to provide adequate stiffness in these bearings without exceeding the strength limits of rotating magnet assemblies. The Boeing Company is designing and building a prototype flywheel of 10 kWh total stored energy and has focused Much effort on the FITS bearing system. This paper will describe the general structure of the bearing and the steps taken to optimize its magnetic and structural performance and show recent test results. C1 Boeing Phantom Works, Seattle, WA 98124 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Day, AC (reprint author), Boeing Phantom Works, Seattle, WA 98124 USA. NR 3 TC 28 Z9 35 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD MAY PY 2002 VL 15 IS 5 BP 838 EP 841 AR PII S0953-2048(02)33953-6 DI 10.1088/0953-2048/15/5/340 PG 4 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 560PT UT WOS:000176091000041 ER PT J AU McCann, MP Calaway, WF Pellin, MJ Veryovkin, IV Constantinides, I Adriaens, A Adams, F AF McCann, MP Calaway, WF Pellin, MJ Veryovkin, IV Constantinides, I Adriaens, A Adams, F TI Resonance-enhanced multiphoton ionization/secondary neutral mass spectrometry and cesium attachment secondary ion mass spectrometry of bronze: a comparison SO SURFACE AND INTERFACE ANALYSIS LA English DT Article DE secondary neutral mass spectrometry; secondary ion mass spectrometry; cesium attachment; resonance-enhanced multiphoton ionization; bronze; iron; nickel; manganese ID DATA SERVICE; DATA SHEETS; ATOMS; NI AB Archaeologists have considerable interests in ancient bronzes. They want to know how these alloys were produced and how they corroded with time. Modern bronzes, with compositions very close to that of some ancient bronzes, have been produced and two methods were examined to characterize one of these modem bronzes. Analysis of this modern bronze using resonance enhanced multiphoton ionization/secondary neutral mass spectrometry (REMPI/SNMS) is examined in detail and compared to cesium attachment secondary ion mass spectrometry (CsAMS) results. Both REMPI/SNMS and CsAMS were used to quantify the composition of Fe, Ni and Mn in a modern quaternary bronze designed to serve as a certified reference material for an ancient bronze. Both methods exhibit reduced matrix effects when compared to secondary ion mass spectrometry (SIMS) and thus quantification should be simplified. It was found that when relative sensitivity factors obtained from a standard bronze material are used to calibrate the instruments, the REMPI/SNMS measurements yield results that were more sensitive and more accurate. Copyright (C) 2002 John Wiley Sons, Ltd. C1 Sam Houston State Univ, Dept Chem, Huntsville, TX 77341 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Instelling Antwerp, Dept Chem, B-2610 Wilrijk, Belgium. RP McCann, MP (reprint author), Sam Houston State Univ, Dept Chem, POB 2117, Huntsville, TX 77341 USA. RI Pellin, Michael/B-5897-2008; Adriaens, Annemie/F-2520-2013 OI Pellin, Michael/0000-0002-8149-9768; Adriaens, Annemie/0000-0003-4034-1881 NR 22 TC 7 Z9 7 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0142-2421 J9 SURF INTERFACE ANAL JI Surf. Interface Anal. PD MAY PY 2002 VL 33 IS 5 BP 394 EP 400 DI 10.1002/sia.1222 PG 7 WC Chemistry, Physical SC Chemistry GA 555EE UT WOS:000175780000004 ER PT J AU Liu, G Rodriguez, JA Dvorak, J Hrbek, J Jirsak, T AF Liu, G Rodriguez, JA Dvorak, J Hrbek, J Jirsak, T TI Chemistry of sulfur-containing molecules on Au(111): thiophene, sulfur dioxide, and methanethiol adsorption SO SURFACE SCIENCE LA English DT Article DE sulphur; gold; surface chemical reaction; thermal desorption spectroscopy; synchrotron radiation photoelectron spectroscopy ID SELF-ASSEMBLED MONOLAYERS; RAY PHOTOELECTRON-SPECTROSCOPY; SCANNING-TUNNELING-MICROSCOPY; METAL-SURFACES; CHEMICAL-PROPERTIES; PT(111) SURFACE; METHYL THIOLATE; GOLD SURFACES; SO2; AG(111) AB The interactions of three sulfur-containing molecules (C4H4S, SO2, CH3SH) with a clean Au(111) surface have been studied with a combination of thermal desorption spectroscopy (TDS) and synchrotron-based high-resolution soft Xray photoelectron spectroscopy. The adsorption and reactivity of the three molecules on Au(111) are very different. Thiophene adsorbs molecularly on Au(111) at 100 K and desorbs completely below 330 K without further decomposition. In the submonolayer range, three different adsorption states for chemisorbed thiophene are identified in TDS. It is suggested that thiopliene preferably adsorbs on the defect sites at the lowest exposure. After the defect sites are saturated, the change from a flat-lying geometry to a tilted adsorption configuration follows as the exposure increases. Sulfur dioxide also does not decompose on Au(111). For SO2 adsorption at 100 K, in addition to the multilayer desorption feature (similar to130 K), only one distinct monolayer peak with a tail extending to higher temperature appears ill TDS. The desorption temperature difference between the SO2 monolayer and multilayer is only 15 K, indicating a weak binding between SO2 and Au. For methanethiol adsorption on Au(111) at 100 K, three desorption states appear in the submonolayer range for the parent thiol. All of them appear below 300 K. The only desorption products at higher temperature are methane or methyl radicals (similar to540 K), and dimethyl disulfide (similar to470 K). Apart from the intact methyl thiol molecule, which exists at low temperatures (less than or equal to 150 K), two inequivalent intermediate thiolates, are seen to coexist on Au(111) in the 150-400 K temperature range, with one of them existing as low as 100 K. Atomic sulfur is present on the surface from 200 to 950 K. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Rodriguez, JA (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RI Hrbek, Jan/I-1020-2013 NR 60 TC 107 Z9 107 U1 4 U2 30 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD MAY 1 PY 2002 VL 505 IS 1-3 BP 295 EP 307 AR PII S0039-6028(02)01377-8 PG 13 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 554MT UT WOS:000175740200031 ER PT J AU Spencer, MJS Nyberg, GL Robinson, AW Stampfl, APJ AF Spencer, MJS Nyberg, GL Robinson, AW Stampfl, APJ TI Adsorption of SiH4 on copper (110) and (111) surfaces SO SURFACE SCIENCE LA English DT Article DE angle resolved photoemission; photoelectron spectroscopy; chemical vapor deposition; chemisorption; copper; silane; visible and ultraviolet photoelectron spectroscopy; electron energy loss spectroscopy (EELS); X-ray photoelectron spectroscopy ID ATOMIC-STRUCTURE; CU(111); ALLOY; SILANE; DECOMPOSITION; CHEMISORPTION; PHOTOEMISSION; SPECTROSCOPY; REACTIVITY; HYDROGEN AB The adsorption of silane on Cu(111) and Cu(110) is examined using vibrational electron energy loss spectroscopy, angle-resolved ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy. At room temperature, SiH adsorbs on Cu(111), whereas complete dissociation occurs oil Cu(110) to leave adsorbed silicon. Below room temperature, an SiHx (x = 2 or 3) species exists oil both surfaces. A surface-molecule bonding model is constructed to describe the adsorbate-substrate interactions and suggests that both Si and SiH adsorb in a substitutional or hollow site on the (111) surface and Si adsorbs in one of the same two sites oil the (110) surface. (C) 2002 Elsevier Science B.V. All rights reserved. C1 La Trobe Univ, Dept Chem, Melbourne, Vic 3086, Australia. Univ Birmingham, Sch Phys & Space Sci, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England. Argonne Natl Lab, Adv Photon Source, Australian Nucl Sci & Technol Org, Australian Synchrotron Res Program, Argonne, IL 60439 USA. RP Nyberg, GL (reprint author), La Trobe Univ, Dept Chem, Melbourne, Vic 3086, Australia. RI Spencer, Michelle/D-6637-2011; Register, CMSS/G-7191-2015; OI Spencer, Michelle J.S./0000-0003-4646-1550 NR 32 TC 6 Z9 6 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD MAY 1 PY 2002 VL 505 IS 1-3 BP 308 EP 324 AR PII S0039-6028(02)01378-X PG 17 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 554MT UT WOS:000175740200032 ER PT J AU Ashby, CR Paul, M Gardner, EL Gerasimov, MR Dewey, SL Lennon, IC Taylor, SJC AF Ashby, CR Paul, M Gardner, EL Gerasimov, MR Dewey, SL Lennon, IC Taylor, SJC TI Systemic administration of 1R,4S-4-AminoCyclopent-2-Ene-Carboxylic acid, a reversible inhibitor of GABA transaminase, blocks expression of conditioned place preference to cocaine and nicotine in rats SO SYNAPSE LA English DT Article DE conditioned place preference; GABA; nicotine; cocaine ID NUCLEUS-ACCUMBENS DOPAMINE; PROGRESSIVE-RATIO; BACLOFEN; ADDICTION; INCREASES; STRATEGY; BEHAVIOR; HEROIN AB We examined the effect of 1R,4S-4-amino-eyelopent-2-ene-carboxylic acid (ACC), a reversible inhibitor of GABA transaminase, on the expression of conditioned place preference response to cocaine and nicotine in rats. Cocaine (20 mg/kg i.p.) and nicotine (0.4 mg/kg s.c.), but not vehicle or 300 mg/kg i.p. of ACC, produced a significant conditioned place preference response. Pretreatment of animals with 300 and 75 mg(kg i.p. of ACC significantly attenuated the expression of the cocaine- and nicotine-induced conditioned place preference responses, respectively. These results are the first to suggest that reversible inhibition of GABA transaminase may be useful in blocking cue-induced relapse to nicotine and cocaine. (C) 2002 Wiley-Liss, Inc. C1 St Johns Univ, Dept Pharmaceut Sci, Jamaica, NY 11439 USA. Pfizer Res Labs, Brooklyn, NY USA. NIDA, Intramural Res Program, Baltimore, MD USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Chirotech Technol Ltd, Cambridge, England. RP Ashby, CR (reprint author), St Johns Univ, PHS Dept, 8000 Utopia Pkwy, Jamaica, NY 11439 USA. NR 17 TC 29 Z9 29 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-4476 J9 SYNAPSE JI Synapse PD MAY PY 2002 VL 44 IS 2 BP 61 EP 63 DI 10.1002/syn.10052 PG 3 WC Neurosciences SC Neurosciences & Neurology GA 539GG UT WOS:000174861700001 PM 11891877 ER PT J AU Piepel, GF Hicks, RD Szychowski, JM Loeppky, JL AF Piepel, GF Hicks, RD Szychowski, JM Loeppky, JL TI Methods for assessing curvature and interaction in mixture experiments SO TECHNOMETRICS LA English DT Article DE mixture component effects; mixture component interactions; mixture interaction plot; nuclear waste glass examples AB The terms curvature and interaction traditionally are not defined or used in the context of mixture experiments because curvature and interaction effects are partially confounded due to the mixture constraint that the component proportions sum to 1. Instead, the term nonlinear blending traditionally is defined and used. However, just as the concept of a component effect is defined specifically for mixture experiments, the concepts of curvature and interaction can be also. These special definitions lead to special sets of points for assessing the curvature and interaction of mixture components. An interaction plot for mixture components is obtained by plotting measured or predicted response values at the special points for assessing interaction. Together with response trace (component effects) plots, the new mixture component interaction plots provide for graphically assessing the linear, curvature, and interaction effects of mixture components. These methods provide a more complete picture of how mixture components affect a response, which is useful in formulating mixtures and confirming or extending subject matter knowledge. The special sets of points and the graphical techniques used to assess linear, curvature, and interaction effects are illustrated using two nuclear waste glass examples. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Kentucky, Dept Stat, Lexington, KY 40506 USA. Simon Fraser Univ, Dept Stat & Actuarial Sci, Burnaby, BC V5A 1S6, Canada. RP Piepel, GF (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. NR 14 TC 3 Z9 3 U1 0 U2 0 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 USA SN 0040-1706 J9 TECHNOMETRICS JI Technometrics PD MAY PY 2002 VL 44 IS 2 BP 161 EP 172 DI 10.1198/004017002317375118 PG 12 WC Statistics & Probability SC Mathematics GA 606LB UT WOS:000178734500007 ER PT J AU de Jong, WA Harrison, RJ Nichols, JA Dixon, DA AF de Jong, WA Harrison, RJ Nichols, JA Dixon, DA TI Fully relativistic correlated benchmark results for uranyl and a critical look at relativistic effective core potentials for uranium (vol 107, pg 22, 2001) SO THEORETICAL CHEMISTRY ACCOUNTS LA English DT Correction C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP de Jong, WA (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA. RI DE JONG, WIBE/A-5443-2008 OI DE JONG, WIBE/0000-0002-7114-8315 NR 2 TC 4 Z9 4 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1432-881X J9 THEOR CHEM ACC JI Theor. Chem. Acc. PD MAY PY 2002 VL 107 IS 5 BP 318 EP 318 DI 10.1007/s00214-002-0328-z PG 1 WC Chemistry, Physical SC Chemistry GA 564UJ UT WOS:000176331700009 ER PT J AU Poet, TS Weitz, KK Gies, RA Edwards, JA Thrall, KD Corley, RA Tanojo, H Hui, XY Maibach, HI Wester, RC AF Poet, TS Weitz, KK Gies, RA Edwards, JA Thrall, KD Corley, RA Tanojo, H Hui, XY Maibach, HI Wester, RC TI PBPK modeling of the percutaneous absorption of perchloroethylene from a soil matrix in rats and humans SO TOXICOLOGICAL SCIENCES LA English DT Article DE human; PBPK modeling; perchloroethylene; rat; soil matrix ID TIME BREATH ANALYSIS; DERMAL ABSORPTION; PARTITION-COEFFICIENTS; VOLATILE CHEMICALS; ORGANIC-CHEMICALS; CHLOROFORM; SKIN; TETRACHLOROETHYLENE; TRICHLOROETHYLENE; PHARMACOKINETICS AB Perchloroethylene (PCE) is a widely used volatile organic chemical. Exposures to PCE are primarily through inhalation and dermal contact. The dermal absorption of PCE from a soil matrix was compared in rats and humans using real-time MS/MS exhaled breath technology and physiologically based pharmacokinetic (PBPK) modeling. Studies with rats were performed to compare the effects of loading volume, concentration, and occlusion. In rats, the percutaneous permeability coefficient (K-p) for PCE was 0.102 +/- 0.017, and was independent of loading volume, concentration, or occlusion. Exhaled breath concentrations peaked within I h in nonoccluded exposures, but were maintained over the 5 h exposure period when the system was occluded. Three human volunteers submerged a hand in a container of PCE-laden soil for 2 h and their exhaled breath was continually monitored during and for 2.5 h following exposure. The absorption and elimination kinetics of PCE were slower in these subjects than initially predicted based upon the PBPK model developed from rat dermal kinetic data. The resulting K, for humans was over 100-fold lower than for the rat utilizing a single, well-stirred dermal compartment. Therefore, two additional PBPK skin compartment models were evaluated: a parallel model to simulate follicular uptake and a layered model to portray a stratum corneum barrier. The parallel dual dermal compartment model was not capable of describing the exhaled breath kinetics, whereas the layered model substantially improved the fit of the model to the complex kinetics of dermal absorption through the hand. In real-world situations, percutaneous absorption of PCE is likely to be minimal. C1 Battelle Mem Inst, Pacific NW Div, Richland, WA 99352 USA. Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA. RP Poet, TS (reprint author), Battelle Mem Inst, Pacific NW Div, POB 999 MSIN P7-59, Richland, WA 99352 USA. NR 36 TC 15 Z9 16 U1 1 U2 4 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAY PY 2002 VL 67 IS 1 BP 17 EP 31 PG 15 WC Toxicology SC Toxicology GA 545DN UT WOS:000175201100005 PM 11961212 ER PT J AU Schultz, IR Merdink, JL Gonzalez-Leon, A Bull, RJ AF Schultz, IR Merdink, JL Gonzalez-Leon, A Bull, RJ TI Dichloroacetate toxicokinetics and disruption of tyrosine catabolism in B6C3F1 mice: dose-response relationships and age as a modifying factor SO TOXICOLOGY LA English DT Article DE dichloroacetate; halogenated acetic acids; kinetics; cancer; tyrosine catabolism; maleylacetoacetate ID GLUTATHIONE TRANSFERASE-ZETA; CHLORAL HYDRATE; DRINKING-WATER; CATALYZED BIOTRANSFORMATION; ACID; TRICHLOROETHYLENE; METABOLISM; TRICHLOROACETATE; PHARMACOKINETICS; INACTIVATION AB Dichloroacetate (DCA) is a rodent carcinogen commonly found in municipal drinking water supplies. Toxicokinetic studies have established that elimination of DCA is controlled by liver metabolism. which occurs by the cytosolic enzyme glutathione-S-transferase-zeta (GST-zeta). DCA is also a mechanism based inhibitor of GST-zeta, and a loss in GST-zeta enzyme activity occurs following repeated doses or prolonged drinking water exposures. GST-zeta is identical to an enzyme that is part of the tyrosine catabolism pathway known as maleylacetoacetate isomerase (MAAI). In this pathway, GST-zeta plays a critical role in catalyzing the isomerization of maleylacetoacetate to fumarylacetoacetate. Disruption of tyrosine catabolism has been linked to increased cancer risk in humans. We studied the elimination of i.v. doses of DCA to young (10 week) and aged (60 week) mice previously treated with DCA in their drinking water for 2 and 56 weeks, respectively. The diurnal change in blood concentrations of DCA was also monitored in mice exposed to three different drinking water concentrations of DCA (2.0, 0.5 and 0.05 g/l). Additional experiments measured the in vitro metabolism of DCA in liver homogenates prepared from treated mice given various recovery times following treatment. The MAAI activity was also measured in liver cytosol obtained from treated mice. Results indicated young mice were the most sensitive to changes in DCA elimination after drinking water treatment. The in vitro metabolism of DCA was decreased at all treatment rates. Partial restoration (similar to65% of controls) of DCA elimination capacity and hepatic GST-zeta activity occurred after 48 h recovery from 14 d 2.0 g/l DCA drinking water treatments. Recovery from treatments could be blocked by interruption of protein synthesis with actinomycin D. MAAI activity was reduced over 80% in liver cytosol from 10-week-old mice. However, MAAI was unaffected in 60-week-old mice. These results indicate that in young mice, inactivation and re-synthesis of GST-zeta is a highly dynamic process and that exogenous factors that deplete or reduce GST-zeta levels will decrease DCA elimination and may increase the carcinogenic potency of DCA. As mice age, the elimination capacity for DCA is less affected by reduced liver metabolism and mice appear to develop some toxicokinetic adaptation(s) to allow elimination of DCA at rates comparable to naive animals. Reduced MAAI activity alone is unlikely to be the carcinogenic mode of action for DCA and may in fact, only be important during the early stages of DCA exposure. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved. C1 Battelle Pacific NW Natl Lab, Richland, WA 99352 USA. RP Schultz, IR (reprint author), MSL, Battelle PNL, 1529 W Sequim Bay Rd, Sequim, WA 98382 USA. NR 37 TC 26 Z9 26 U1 0 U2 2 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0300-483X J9 TOXICOLOGY JI Toxicology PD MAY 1 PY 2002 VL 173 IS 3 BP 229 EP 247 AR PII S0300-483X(02)00034-3 DI 10.1016/S0300-483X(02)00034-3 PG 19 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 552MK UT WOS:000175624000005 PM 11960676 ER PT J AU Oldenburg, CM AF Oldenburg, CM TI Untitled - Foreword SO TRANSPORT IN POROUS MEDIA LA English DT Editorial Material C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Oldenburg, CM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RI Oldenburg, Curtis/L-6219-2013 OI Oldenburg, Curtis/0000-0002-0132-6016 NR 5 TC 0 Z9 0 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0169-3913 J9 TRANSPORT POROUS MED JI Transp. Porous Media PD MAY PY 2002 VL 47 IS 2 BP 123 EP 124 DI 10.1023/A:1015514705146 PG 2 WC Engineering, Chemical SC Engineering GA 554QX UT WOS:000175749600001 ER PT J AU Pringle, SE Glass, RJ Cooper, CA AF Pringle, SE Glass, RJ Cooper, CA TI Double-diffusive finger convection in a Hele-Shaw cell: An experiment exploring the evolution of concentration fields, length scales and mass transfer SO TRANSPORT IN POROUS MEDIA LA English DT Article DE double-diffusive convection; instability ID SALT FINGERS; DISPERSION; TRANSPORT; FRACTURES; RATIO AB We present the results of an experiment conducted to explore the temporal and spatial development of double-diffusive finger convection in a Hele-Shaw cell. Two solutions each containing a different density affecting component were layered in a density stable configuration (sucrose solution over a more dense salt solution) with a nearly perturbation-free interface between. The mismatch of diffusive time scales for the two components leads to local density instabilities that generate upward and downward convecting fingers. Throughout the course of the experiment, a full-field quantitative light transmission technique was used to measure concentration fields of a dye tracer dissolved in the salt solution. Analysis of these fields yielded the temporal evolution of length scales associated with the vertical and horizontal finger structure as well as mass transfer. Distinct developmental stages are identified with strong correlation between all measures. These data provide a baseline that can be used to develop and evaluate both process-level models that simulate the full complexity of the evolving flow field and large-scale effective models that integrate over small-scale behavior. C1 Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA. Sandia Natl Labs, Flow Visualizat & Proc Lab, Albuquerque, NM 87185 USA. Univ Nevada, Desert Res Inst, Div Hydrol Sci, Reno, NV 89506 USA. RP Pringle, SE (reprint author), Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA. NR 28 TC 13 Z9 13 U1 2 U2 4 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0169-3913 J9 TRANSPORT POROUS MED JI Transp. Porous Media PD MAY PY 2002 VL 47 IS 2 BP 195 EP 214 DI 10.1023/A:1015535214283 PG 20 WC Engineering, Chemical SC Engineering GA 554QX UT WOS:000175749600005 ER PT J AU Stephan, AC Finot, EL Ji, HF Pinnaduwage, LA Thundat, T AF Stephan, AC Finot, EL Ji, HF Pinnaduwage, LA Thundat, T TI Micromechanical measurement of active sites on silicon nitride using surface free energy variation SO ULTRAMICROSCOPY LA English DT Article; Proceedings Paper CT 3rd International Conference on Scanning Probe Microscopy, Sensors, and Nanostructures CY MAY 27-31, 2001 CL TOKYO, JAPAN DE microcantilevers; silicon nitride surface; relative humidity sensor; free surface energy; surface stress ID STRESS; MICROCANTILEVERS AB We have investigated chemical reactions between adsorbed water and active sites on a silicon nitride surface as a function of temperature and relative humidity using microcantilevers. Effects that might produce a change in the response of the microcantilever, such as a mass adsorption, surface tension of the adsorbed water, and changes in thermal conductivity, were systematically investigated. It is shown that the judicious choice of experimental conditions could make these effects essentially inconsequential in comparison with the instrument response produced by the change in free surface energy of the microcantilever due to the chemical reactions. Using this method, the variation in free surface energy when changing from dry to high humidity conditions was found and the number of active sites that reacted was estimated. This method may be extended to other problems for use in determining surface free energy change and thus the density of reactant sites under different conditions of interest. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Life Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. RP Thundat, T (reprint author), Oak Ridge Natl Lab, Life Sci Div, POB 2008, Oak Ridge, TN 37831 USA. NR 24 TC 14 Z9 14 U1 4 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD MAY PY 2002 VL 91 IS 1-4 BP 1 EP 8 AR PII S0304-3991(02)00076-1 DI 10.1016/S0304-3991(02)00076-1 PG 8 WC Microscopy SC Microscopy GA 585KT UT WOS:000177524500002 PM 12211456 ER PT J AU Muralidharan, G Nicholson, DM Rajic, S Daniels-Race, TM Li, H Thundat, T Datskos, PG AF Muralidharan, G Nicholson, DM Rajic, S Daniels-Race, TM Li, H Thundat, T Datskos, PG TI An atomic force micro scope-based investigation of vertical transport through GaAs/GaAlAs/InAlAs/GaAs step-barrier heterostructures SO ULTRAMICROSCOPY LA English DT Article; Proceedings Paper CT 3rd International Conference on Scanning Probe Microscopy, Sensors, and Nanostructures CY MAY 27-31, 2001 CL TOKYO, JAPAN ID NEGATIVE DIFFERENTIAL RESISTANCE; 2-STEP BARRIER AB Study of vertical transport through heterostructures consisting of single, double, or multiple quantum barriers is of both fundamental and technological interest. While extensive data regarding electron transport is available for single-and double-barrier structures, relatively less information is available for transport through step-barrier structures. In this paper, we present results from a study of room temperature vertical transport through a GaAs/GaAlAs/InAlAs/GaAs multistep-barrier heterostructure. A typical atomic force microscope has been adapted to perform transport measurements, thus allowing precise control of the physical location of the region of measurement. I-V measurements reveal negative differential resistance (NDR) peaks, thus confirming the formation of resonant states in a triangular well created when a voltage bias is applied across the step barrier. I-V curves have also been calculated by numerically solving the Schrodinger wave equation for this step-barrier structure. Comparison between the measured and calculated I-V curves shows reasonable agreement in the number of NDR peaks. However, discrepancies exist between the measured and calculated values for the voltages at which these NDR peaks occur. Some possible reasons for these discrepancies are discussed in this work. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. Duke Univ, Durham, NC 27708 USA. RP Muralidharan, G (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Muralidharan, Govindarajan/J-6155-2015 NR 11 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD MAY PY 2002 VL 91 IS 1-4 BP 133 EP 138 AR PII S0304-3991(02)00092-X DI 10.1016/S0304-3991(02)00092-X PG 6 WC Microscopy SC Microscopy GA 585KT UT WOS:000177524500018 PM 12211461 ER PT J AU Greenwood, MS Bamberger, JA AF Greenwood, MS Bamberger, JA TI Ultrasonic sensor to measure the density of a liquid or slurry during pipeline transport SO ULTRASONICS LA English DT Article; Proceedings Paper CT 1st Ultrasonics International Conference CY JUL 03-05, 2001 CL DELFT, NETHERLANDS DE density sensor; on-line sensor; process control; reflection coefficients; velocity of sound measurement; suspension characterization AB This paper describes the design and testing of a computer-controlled sensor for the real-time measurement of the density of a liquid or slurry. It is to be deployed at the US Department of Energy's Hanford Site in Richland, WA, to monitor slurry properties during radioactive waste transfers. To demonstrate the sensor performance, tests were carried out using non-radioactive waste simulants and the results will be presented. The sensor is mounted flush with the pipeline wall in a nominal 5-cm. (2-in.) pipe spool piece. The design pressure is 2.8 MPa (400 psi). The probe wedge in contact with the slurry was selected to operate up to pH 14, and the probe components were radiation tested at exposures of I x 106 R. The sensor is applicable for process control of all types of liquids or slurries in pipelines or in vessels. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Greenwood, MS (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. NR 2 TC 18 Z9 21 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0041-624X J9 ULTRASONICS JI Ultrasonics PD MAY PY 2002 VL 40 IS 1-8 BP 413 EP 417 AR PII S0041-624X(02)00153-1 DI 10.1016/S0041-624X(02)00153-1 PG 5 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA 570FJ UT WOS:000176648000075 PM 12159976 ER PT J AU Hurley, DH Telschow, KL Cottle, D AF Hurley, DH Telschow, KL Cottle, D TI Probing acoustic nonlinearity on lengths scales comparable to material grain dimensions SO ULTRASONICS LA English DT Article; Proceedings Paper CT 1st Ultrasonics International Conference CY JUL 03-05, 2001 CL DELFT, NETHERLANDS DE nonlinear acoustics; laser acoustics; surface acoustic waves; Rayleigh waves AB The focus of this presentation is to describe our efforts at laser generation of high frequency surface acoustic waves and detection of the nonlinear contribution in the acoustic near-field of the source. Narrow band acoustic generation is accomplished by interfering two pulsed laser beams at the surface of the sample. A Michelson interferometer, that incorporates a high power microscope objective, is used to detect the acoustic disturbance. Detection near the source combined with high frequency generation (similar to0.1 GHz) facilitates investigation of fundamental processes of harmonic generation on length scales comparable to grain size dimensions. Published by Elsevier Science B.V. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Hurley, DH (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. NR 8 TC 6 Z9 6 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0041-624X J9 ULTRASONICS JI Ultrasonics PD MAY PY 2002 VL 40 IS 1-8 BP 617 EP 620 AR PII S0041-624X(02)00185-3 DI 10.1016/S0041-624X(02)00185-3 PG 4 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA 570FJ UT WOS:000176648000107 PM 12160012 ER PT J AU Ryon, MG Stewart, AJ Kszos, LA Phipps, TL AF Ryon, MG Stewart, AJ Kszos, LA Phipps, TL TI Impacts on streams from the use of sulfur-based compounds for dechlorinating industrial effluents SO WATER AIR AND SOIL POLLUTION LA English DT Article DE dechlorination; fish kill; sodium bisulfite; sodium thiosulfate; toxicity; wastewater management ID TOXICITY; CHLORINE; FISH AB We evaluate environmental impacts associated with sulfur-based dechlorinating agents (sodium bisulfite and sodium thiosulfate) commonly used in industrial wastewater treatment by presenting data from two examples for Department of Energy facilities in Tennessee and Kentucky. One case involved a fish kill (> 24,000 fish) caused directly by sodium bisulfite; the second describes a near-miss situation resulting from over-dosing with sodium thiosulfate. Toxicity tests showed that overfeed situations with sodium thiosulfate or sodium bisulfite can depress pH and dissolved oxygen, causing mortality of fish. Bacteria also can metabolize some sulfur-based dechlorinating agents, thereby increasing the potential for reductions in pH and concentrations of dissolved oxygen. Although removing toxic levels of chlorine is important when releasing chlorine-containing wastewaters to aquatic systems, waste-treatment plant operators should also be aware of significant impacts that can occur if sulfur-based dechlorinating agents are used to excess. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Parametrix Inc, Kirkland, WA 98033 USA. RP Ryon, MG (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. OI Kszos, Lynn/0000-0002-8218-9032; stewart, arthur/0000-0003-1968-5997 NR 16 TC 9 Z9 9 U1 1 U2 5 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0049-6979 J9 WATER AIR SOIL POLL JI Water Air Soil Pollut. PD MAY PY 2002 VL 136 IS 1-4 BP 255 EP 268 DI 10.1023/A:1015264509699 PG 14 WC Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences; Water Resources GA 544QZ UT WOS:000175172900015 ER PT J AU Beller, HR AF Beller, HR TI Anaerobic biotransformation of RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) by aquifer bacteria using hydrogen as the sole electron donor SO WATER RESEARCH LA English DT Article DE RDX; anaerobic; hydrogen; acetogen; groundwater ID CLOSTRIDIUM-THERMOACETICUM; MICROBIAL-DEGRADATION; REDUCING CONDITIONS; BIODEGRADATION; NITRATE; 2,4,6-TRINITROTOLUENE; METABOLISM; TOLUENE; SOIL; TNT AB RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) is a nitramine explosive that has contaminated soil and groundwater at military installations throughout the US. Although anaerobic RDX metabolism has been reported, the process is not well understood, as past studies have typically involved complex, undefined media with multiple potential electron donors and acceptors. In this study, bacteria enriched from RDX-contaminated aquifer sediments consumed RDX in a defined, bicarbonate-buffered, anaerobic medium containing hydrogen as the sole electron donor and RDX as a potential electron acceptor and sole nitrogen source. RDX was not consumed in live controls that did not contain hydrogen. Transient formation of mononitroso- and dinitroso-RDX metabolites (hexahydro-1-nitroso-3,5-dinitro-1,3,5-triazine and hexahydro-1,3-dinitroso-5-nitro-1,3,5-triazine, respectively) was documented by liquid chromatography-mass spectrometry. However, studies with C-14-labeled RDX suggested that mineralization to carbon dioxide was negligible (<2%), which is consistent with cometabolic transformation. Several lines of evidence suggest that the RDX-transforming bacteria under study were homoacetogens, including correlations between RDX consumption and acetate production. Methanogens were unlikely to be responsible for RDX metabolism, as the presence of 2-bromoethanesulfonate, an inhibitor of methanogenesis, did not appear to affect RDX metabolism. The presence of nitrate reversibly halted RDX metabolism, whereas ammonium had no discernible effect, which implies that: (i) nitrate, which commonly occurs in RDX-contaminated groundwater, may inhibit in situ RDX metabolism, and (ii) although RDX may act as both a nitrogen source and cometabolic electron sink, the latter role predominates, as RDX reduction will proceed regardless of whether or not a more favorable nitrogen source is present. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Beller, HR (reprint author), Lawrence Livermore Natl Lab, POB 808,L-542, Livermore, CA 94551 USA. RI Beller, Harry/H-6973-2014 NR 30 TC 48 Z9 49 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0043-1354 J9 WATER RES JI Water Res. PD MAY PY 2002 VL 36 IS 10 BP 2533 EP 2540 AR PII S0043-1354(01)00480-8 DI 10.1016/S0043-1354(01)00480-8 PG 8 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA 569GF UT WOS:000176592300012 PM 12153019 ER PT J AU Khaleel, R Yeh, TCJ Lu, ZM AF Khaleel, R Yeh, TCJ Lu, ZM TI Upscaled flow and transport properties for heterogeneous unsaturated media SO WATER RESOURCES RESEARCH LA English DT Article DE vadose zone; spatial variability; numerical modeling; stochastic processes; effective properties; equivalent media ID STATE-DEPENDENT ANISOTROPY; POROUS-MEDIA; STOCHASTIC-ANALYSIS; SOLUTE TRANSPORT; HYDRAULIC CONDUCTIVITY; NUMERICAL-MODEL; SOILS; SANDS; WATER; MACRODISPERSION AB [1] To represent a heterogeneous unsaturated medium by its homogeneous equivalent, stochastic theory-based analytical formulas and numerical Monte Carlo simulations are used to obtain upscaled (effective) flow and transport properties. The Monte Carlo experiments simulate steady state flow and transient transport of nonreactive solute in two-dimensional heterogeneous media. Constitutive relations for unsaturated media at the mesh-size scale are based on the van Genuchten-Mualem relationships. A unit-mean-gradient approach is used to derive upscaled properties for flow parallel and perpendicular to bedding. Upscaled moisture retention and unsaturated conductivities (K) and longitudinal dispersivities are obtained by simulating steady gravity drainage conditions for a series of applied infiltration rates, characteristic of relatively dry conditions in coarse-textured sediments. Macrodispersivities are calculated on the basis of spatial moments of the ensemble-mean plume. Results show that the calculated effective unsaturated K based on the analytical formulas compare well with those based on Monte Carlo simulations. The macroscopic anisotropy (ratio of K parallel to bedding to K perpendicular to bedding) increases with increasing tension, although the increase is rather mild. The longitudinal macrodispersivity for the equivalent homogeneous medium also increases with increasing tension. A comparison of numerical results with stochastic solutions suggests that the computed dispersivities are of the same order of magnitude at low tensions. At higher tensions the dispersivity estimates deviate significantly. Nonetheless, both numerical and analytical results show that the longitudinal dispersivities for flow parallel to bedding are higher than those for flow perpendicular to bedding. In addition, our results suggest that the Fickian regime is reached much earlier for cases with flow perpendicular to bedding than for those with flow parallel to bedding. C1 Fluor Fed Serv, Richland, WA 99352 USA. Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Khaleel, R (reprint author), Fluor Fed Serv, POB 1050, Richland, WA 99352 USA. EM raziuddin_khaleel@rl.gov; ybiem@mac.hwr.arizona.edu; zhiming@vega.lanl.gov NR 36 TC 24 Z9 24 U1 2 U2 11 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 EI 1944-7973 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY PY 2002 VL 38 IS 5 AR 1053 DI 10.1029/2000WR000072 PG 12 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 609YY UT WOS:000178935000012 ER PT J AU Winter, CL Tartakovsky, DM Guadagnini, A AF Winter, CL Tartakovsky, DM Guadagnini, A TI Numerical solutions of moment equations for flow in heterogeneous composite aquifers SO WATER RESOURCES RESEARCH LA English DT Article DE random; stochastic; uncertainty; domain decomposition ID NONSTATIONARY SPECTRAL METHOD; STEADY-STATE FLOW; POROUS-MEDIA; LOCALIZED ANALYSES; TRANSPORT; GROUNDWATER AB [1] We analyze flow in heterogeneous media composed of multiple materials whose hydraulic properties and geometries are uncertain. Our analysis relies on the composite media theory of Winter and Tartakovsky [2000, 2002], which allows one to derive and solve moment equations even when the medium is highly heterogeneous. We use numerical solutions of Darcy flows through a representative composite medium to investigate the robustness of perturbation approximations in porous medium with total log conductivity variances as high as 20. We also investigate the relative importance of the two sources of uncertainty in composite media, material properties, and geometry. In our examples the uncertain geometry by itself captures the main features of the mean head estimated by the full composite model even when the within-material conductivities are deterministic. However, neglecting randomness within materials leads to head variance estimates that are qualitatively and quantitatively wrong. We compare the composite media approach to approximations that replace statistically inhomogeneous conductivity fields with pseudohomogeneous random fields with deterministic trends. We demonstrate that models with a deterministic trend can be expected to give a poor estimate of the statistics of head. C1 Los Alamos Natl Lab, Div Theoret, Grp T7, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Politecn Milan, Dipartimento Ingn Indraul Ambientale Infrastruttu, I-20133 Milan, Italy. RP Winter, CL (reprint author), Los Alamos Natl Lab, Div Theoret, Grp T7, MS B284, Los Alamos, NM 87545 USA. RI Tartakovsky, Daniel/E-7694-2013; Winter, C. Larrabee/D-3918-2013 NR 21 TC 16 Z9 16 U1 0 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY PY 2002 VL 38 IS 5 AR 1055 DI 10.1029/2001WR000222 PG 8 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 609YY UT WOS:000178935000010 ER PT J AU Fischer, P Eimuller, T Goll, D Stoll, H Puzic, A Schutz, G Denbeaux, G AF Fischer, P Eimuller, T Goll, D Stoll, H Puzic, A Schutz, G Denbeaux, G TI Magnetic imaging with full-field soft X-ray microscopy SO ZEITSCHRIFT FUR METALLKUNDE LA English DT Article DE X-ray magnetic circular dichroism; soft X-ray microscopy; magnetic domain structures; micromagnetism; spin dynamics ID SCANNING-TUNNELING-MICROSCOPY; CIRCULAR-DICHROISM; SPIN REORIENTATION; DOMAINS; ELECTRON; DYNAMICS AB The current achievements in magnetic transmission soft X-ray microscopy are reviewed. The magnetic contrast is given by X-ray magnetic circular dichroism (X-MCD), i.e., the dependence of the absorption coefficient of circularly polarized X-rays on the projection of the magnetization in a ferromagnetic system onto the photon propagation direction. X-MCD contrast can reach, e. g., at L-2,L-3 edges in transition metals large values up to 50%. Combined with a soft X-ray microscope where Fresnel zone plates as optical elements provide a lateral resolution down to 25 nm, it allows for imaging magnetic microstructures. Recording the images in varying external magnetic fields, inherent chemical specificity, a high sensitivity to thin magnetic layers due to the large contrast, and the possibility to distinguish between in-plane and out-of plane contributions allow detailed studies of static magnetization reversal processes in magnetic patterned elements and thin films. Micromagnetic simulations support the experimental findings. The broad applicability of this novel experimental technique to both fundamental and technologically relevant issues in nanomagnetism is demonstrated by selected examples. Future directions towards imaging spin dynamics on a psec time scale are briefly outlined. C1 Max Planck Inst Met Res, D-70569 Stuttgart, Germany. Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. RP Fischer, P (reprint author), Max Planck Inst Met Res, Heisenbergstr 1, D-70569 Stuttgart, Germany. RI Fischer, Peter/A-3020-2010 OI Fischer, Peter/0000-0002-9824-9343 NR 37 TC 0 Z9 0 U1 0 U2 0 PU CARL HANSER VERLAG PI MUNICH PA KOLBERGERSTRASSE 22, POSTFACH 86 04 20, D-81679 MUNICH, GERMANY SN 0044-3093 J9 Z METALLKD JI Z. Metallk. PD MAY PY 2002 VL 93 IS 5 BP 377 EP 382 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA 564JE UT WOS:000176310600006 ER PT J AU Christon, MA AF Christon, MA TI Dealing with pressure: FEM solution strategies for the pressure in the time-dependent Navier-Stokes equations SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS LA English DT Article DE Navier-Stokes; pressure-Poisson; stabilization; projection method; approximate projection; A-conjugate projection ID VISCOUS INCOMPRESSIBLE-FLOW; FINITE-ELEMENT METHOD; SEMIIMPLICIT PROJECTION METHODS; CONSISTENT MASS MATRIX; RIGHT-HAND SIDES; ITERATIVE SOLUTION; LINEAR-SYSTEMS; IMPLEMENTATION; EFFICIENT; CURE AB This paper presents a survey of solution methods for calculating the pressure in the time-dependent Navier-Stokes equations. The primary focus is on the treatment of the pressure-Poisson equation deriving from index-1 DAE formulations of the Navier-Stokes equations. Based on extensive operational experience with a variety of solution strategies, the combination of a stabilized pressure-Poisson operator with an A-conjugate projection and SSOR preconditioned conjugate gradient method has been found to yield the overall best performance relative to the resolve cost of a high performance direct solver. Copyright (C) 2002 John Wiley Sons, Ltd. C1 Sandia Natl Labs, Computat Phys R&D Dept, Albuquerque, NM 87185 USA. RP Christon, MA (reprint author), Sandia Natl Labs, Computat Phys R&D Dept, POB 5800,M-S 0819, Albuquerque, NM 87185 USA. NR 50 TC 5 Z9 5 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0271-2091 J9 INT J NUMER METH FL JI Int. J. Numer. Methods Fluids PD APR 30 PY 2002 VL 38 IS 12 BP 1177 EP 1198 DI 10.1002/fld.218 PG 26 WC Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas SC Computer Science; Mathematics; Mechanics; Physics GA 548MP UT WOS:000175392000004 ER PT J AU Halpern, MB Thorn, CB AF Halpern, MB Thorn, CB TI Large N matrix mechanics on the light-cone SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article DE quantum field theory; large N; light-cone; infinite momentum; Cuntz algebra; integrable models ID MASTER FIELD; LIMIT AB We report a simplification in the large N matrix mechanics of light-cone matrix field theories. The absence of pure creation or pure annihilation terms in the Hamiltonian formulation of these theories allows us to find their reduced large N Hamiltonians as explicit functions of the generators of the Cuntz algebra. This opens up a free-algebraic playground of new reduced models - all of which exhibit new hidden conserved quantities at large N and all of whose eigenvalue problems are surprisingly simple. The basic tool we develop for the study of these models is the infinite dimensional algebra of all normal-ordered products of Cuntz operators, and this algebra also leads us to a special number-conserving subset of these models, each of which exhibits an infinite number of new hidden conserved quantities at large N. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Halpern, MB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. OI Thorn, Charles/0000-0002-2671-9799 NR 25 TC 6 Z9 6 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD APR 30 PY 2002 VL 17 IS 11 BP 1517 EP 1542 DI 10.1142/S0217751X02009692 PG 26 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 552HP UT WOS:000175614300005 ER PT J AU Nieto, MM Truax, DR AF Nieto, MM Truax, DR TI Schrodinger equations with time-dependent P-2 and X-2 terms SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article ID ISOMORPHIC SYMMETRY ALGEBRAS; OPERATOR SQUEEZED STATES; QUANTUM OSCILLATOR; SYSTEMS; COHERENT; MASS AB We present some general results for the time-dependent mass Hamiltonian problem with H = -1/2e(-2nu(t))partial derivative(xx)+h((2))(t)e(2nu)(t)(x2), where nu(t) is a continuous function of t. This Hamiltonian corresponds to a time-dependent mass (TM) Schrodinger equation with the restriction that there are only P-2 and X-2 terms. We give the specific transformations to a different quadratic Schrodinger (TQ) equation and to a different time-dependent oscillator (TO) equation. For each Schrodinger system, we give the Lie algebra of space-time symmetries and (x, t) representations for number states, coherent states and squeezed states. These general results include earlier works as special cases. C1 Los Alamos Natl Lab, Theoret Div MS B285, Los Alamos, NM 87545 USA. Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada. RP Nieto, MM (reprint author), Los Alamos Natl Lab, Theoret Div MS B285, Los Alamos, NM 87545 USA. NR 33 TC 0 Z9 0 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD APR 30 PY 2002 VL 17 IS 11 BP 1559 EP 1575 DI 10.1142/S0217751X02009667 PG 17 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 552HP UT WOS:000175614300007 ER PT J AU Fattebert, JL Gygi, F AF Fattebert, JL Gygi, F TI Density functional theory for efficient ab initio molecular dynamics simulations in solution SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article DE ab initio molecular dynamics; density functional theory; continuum solvation model; real-space grids ID POLARIZABLE CONTINUUM MODEL; GENERALIZED GRADIENT APPROXIMATION; AQUEOUS-SOLUTION; FREE-ENERGIES; SOLVATION; SOLVENT; WATER; COMPUTATION; EQUATIONS; QUANTUM AB We present a density functional for first-principles molecular dynamics simulations that includes the electrostatic effects of a continuous dielectric medium. It allows for numerical simulations of molecules in solution in a model polar solvent. We propose a smooth dielectric model function to model solvation into water and demonstrate its good numerical properties for total energy calculations and constant energy molecular dynamics. (C) 2002 Wiley Periodicals, Inc. C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. RP Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, POB 5508,L-561, Livermore, CA 94551 USA. EM fattebert1@llnl.gov NR 37 TC 69 Z9 69 U1 3 U2 23 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0192-8651 EI 1096-987X J9 J COMPUT CHEM JI J. Comput. Chem. PD APR 30 PY 2002 VL 23 IS 6 BP 662 EP 666 DI 10.1002/jcc.10069 PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA 537CH UT WOS:000174739600006 PM 11939598 ER PT J AU Sasaki, DY Waggoner, TA Last, JA Alam, TM AF Sasaki, DY Waggoner, TA Last, JA Alam, TM TI Crown ether functionalized lipid membranes: Lead ion recognition and molecular reorganization SO LANGMUIR LA English DT Article ID AIR-WATER-INTERFACE; RESONANCE ENERGY-TRANSFER; SELF-ASSEMBLED MONOLAYER; MACROCYCLE INTERACTION; LIGAND-BINDING; CHOLERA-TOXIN; KINETIC DATA; COMPLEXES; ACID; ELECTRODES AB A fluorescent lipid bilayer, functionalized with 18-crown-6, was developed to examine the mechanism of chemical recognition-induced molecular reorganization events in a membrane system. The synthetic receptor-lipid, PS18C6, was prepared with the crown ether at the headgroup position and a pyrene fluorescent tag on the hydrophobic tail. When incorporated into bilayers of distearylphosphatidylcholine, the receptor-lipid aggregated into domains, evidenced by the relatively large pyrene excimer emission from the bilayer. Langmuir pressure-area (pi-A) isotherm measurements and atomic force microscopy (AFM) further aided in characterizing the receptor aggregation at the macro- and nanoscale, respectively. The functionalized bilayer exhibited selective affinity for mercuric and lead ions in aqueous buffered solution (pH 7.4), with a fluorescence response that was linear over the concentration range 10(-7) to 10(-1) M metal ions. H-1 NMR studies established that the binding stoichiometry of PS18C6 with lead was 1:1, with K-a = 10(5) M-1 in methanol. Recognition and binding of lead ions at the membrane surface resulted in a rapid and prominent reorganization of the receptor-lipids in the membrane that was measurable at both the macro- and nanoscales. Removal of the lead ions, through the addition of EDTA, resulted in recovery of the original fluorescence and the reaggregation of structures in the membrane. C1 Sandia Natl Labs, Biomol Mat & Interface Sci Dept, Albuquerque, NM 87185 USA. Sandia Natl Labs, Organ Mat Dept, Albuquerque, NM 87185 USA. RP Sasaki, DY (reprint author), Sandia Natl Labs, Biomol Mat & Interface Sci Dept, POB 5800, Albuquerque, NM 87185 USA. NR 52 TC 34 Z9 36 U1 2 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD APR 30 PY 2002 VL 18 IS 9 BP 3714 EP 3721 DI 10.1021/la011651r PG 8 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 546TF UT WOS:000175289600052 ER PT J AU Kent, MS Yim, H Sasaki, DY Majewski, J Smith, GS Shin, K Satija, S Ocko, BM AF Kent, MS Yim, H Sasaki, DY Majewski, J Smith, GS Shin, K Satija, S Ocko, BM TI Segment concentration profile of myoglobin adsorbed to metal ion chelating lipid monolayers at the air-water interface by neutron reflection SO LANGMUIR LA English DT Article ID X-RAY; PROTEIN CRYSTALS; CRYSTALLIZATION; MEMBRANES; SURFACE; REORGANIZATION; COORDINATION; DIFFRACTION; MICROSCOPY; BINDING C1 Sandia Natl Labs, Dept 1815, Albuquerque, NM 87185 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Kent, MS (reprint author), Sandia Natl Labs, Dept 1815, POB 5800, Albuquerque, NM 87185 USA. RI Shin, Kwanwoo /C-4979-2012; Lujan Center, LANL/G-4896-2012; OI Shin, Kwanwoo/0000-0002-7563-8581 NR 25 TC 20 Z9 23 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD APR 30 PY 2002 VL 18 IS 9 BP 3754 EP 3757 DI 10.1021/la011440m PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 546TF UT WOS:000175289600057 ER PT J AU Gorbarenko, SA Nurnberg, D Derkachev, AN Astakhov, AS Southon, JR Kaiser, A AF Gorbarenko, SA Nurnberg, D Derkachev, AN Astakhov, AS Southon, JR Kaiser, A TI Magnetostratigraphy and tephrochronology of the Upper Quaternary sediments in the Okhotsk Sea: implication of terrigenous, volcanogenic and biogenic matter supply SO MARINE GEOLOGY LA English DT Article DE Okhotsk Sea; sediment; stratigraphy; tephra; magnetic susceptibility ID NORTHWESTERN PACIFIC; GLACIAL MAXIMUM; OCEAN; CLIMATE; RECORD; CIRCULATION; DELTA-C-13; CADMIUM; SYSTEM AB Seven lithological units, alternating between horizons enriched in biogenic opal (diatoms) and carbonate (foraminifera) and units composed largely of terrigenous sediment with very low biogenic admixture, were distinguished in a series of Late Quaternary sediment cores from the Sea of Okhotsk. Sediments were characterised using on-board visual description, smear-slides analyses, grain-size composition and magnetic susceptibility (MS) records. Five tephra marker layers, identified as Ko, TR, K2, K3 and K4, were distinguished using petrological, mineralogical and geochemical analyses. Age models were developed by comparing lithological units, tephra stratigraphy and MS records with oxygen isotope curves and with records of biogenic CaCO3, opal content, and sediment grain-size composition in three AMS radiocarbon dated Okhotsk cores. This chronological framework allowed us to investigate climate control over the sedimentation regime and productivity, and to clarify the formation times of the lithological and tephra units. The data show that sediment MS variations in the south-eastern area of the glacial Okhotsk Sea arose primarily from volcanic material input. The sedimentation in all other parts of the sea was mainly controlled by the supply of terrigenous material. The cores show a tight correlation between MS, sediment grain size and climate change in the Okhotsk Sea: coarse sediments with a high MS were accumulated during the cold period-oxygen isotope stages (MIS) 2, 4, 6; fine sediments with a low ice-rafted debris (IRD) content and MS were formed in the warm isotope stages. According to the oxygen isotope stratigraphy and radiocarbon data, the Ko, TR, K2, K3 and K4 tephra were deposited at 7.7, 8.0, 26.0 kyr BP, in MIS 4 about 60-70 kyr ago, and near MIS 5.4, respectively. Comparison of tephra mineralogy, petrology, spatial distributions and ages with the history of Kurile-Kamchatka volcanism allows us to identify likely candidates for the tephra source eruptions. The combined use of MS records, tephxochronology and lithological unit sequences provides a detailed basis for Okhotsk Sea sediment stratigraphy. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Russian Acad Sci, VV Ilichev Pacific Oceanol Inst, Far E Div, Vladivostok 690041, Russia. Res Ctr Marine Geosci, GEOMAR, D-24128 Kiel, Germany. Lawrence Livermore Natl Lab, Ctr AMS, Livermore, CA 94551 USA. RP Gorbarenko, SA (reprint author), Russian Acad Sci, VV Ilichev Pacific Oceanol Inst, Far E Div, Baltiyskaya Str 43, Vladivostok 690041, Russia. NR 55 TC 63 Z9 75 U1 2 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0025-3227 J9 MAR GEOL JI Mar. Geol. PD APR 30 PY 2002 VL 183 IS 1-4 BP 107 EP 129 DI 10.1016/S0025-3227(02)00164-0 PG 23 WC Geosciences, Multidisciplinary; Oceanography SC Geology; Oceanography GA 561DA UT WOS:000176121100007 ER PT J AU Barenblatt, GI Chorin, AJ Prostokishin, VM AF Barenblatt, GI Chorin, AJ Prostokishin, VM TI A model of a turbulent boundary layer with a nonzero pressure gradient SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE self-similarity; scaling laws ID FLOW AB According to a model of the turbulent boundary layer that we propose, in the absence of external turbulence the intermediate region between the viscous sublayer and the external flow consists of two sharply separated self-similar structures, The velocity distribution in these structures is described by two different scaling laws. The mean velocity u in the region adjacent to the viscous sublayer is described by the previously obtained Reynolds-number-dependent scaling law phi = u/u* = Aeta(alpha), A = 1/root3 In Re-Lambda + 5/2, alpha = 3/2 In Re-Lambda, eta = u*y/nu. (Here u* is the dynamic or friction velocity, y is the distance from the wall, v the kinematic viscosity of the fluid, and the Reynolds number Re-Lambda is well defined by the data.) in the region adjacent to the external flow, the scaling law is different: phi = Beta(beta). The power beta for zero-pressure-gradient boundary layers was found by processing various experimental data and is close (with some scatter) to 0.2. We show here that for nonzero-pressure-gradient boundary layers, the power beta is larger than 0.2 in the case of an adverse pressure gradient and less than 0.2 for a favorable pressure gradient. Similarity analysis suggests that both the coefficient B and the power beta depend on Re-Lambda and on a new dimensionless parameter P proportional to the pressure gradient. Recent experimental data of Perry, Marusic, and Jones were analyzed, and the results are in agreement with the model we propose. C1 Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Russian Acad Sci, PP Shirshov Oceanol Inst, Moscow 117218, Russia. RP Barenblatt, GI (reprint author), Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA. OI Prostokishin, Valeriy/0000-0001-6185-9642 NR 14 TC 15 Z9 15 U1 2 U2 8 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 30 PY 2002 VL 99 IS 9 BP 5772 EP 5776 DI 10.1073/pnas.082117699 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 548FK UT WOS:000175377800007 PM 16578875 ER PT J AU Abraham, FF Walkup, R Gao, HJ Duchaineau, M De la Rubia, TD Seager, M AF Abraham, FF Walkup, R Gao, HJ Duchaineau, M De la Rubia, TD Seager, M TI Simulating materials failure by using up to one billion atoms and the world's fastest computer: Brittle fracture SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID INSTABILITY DYNAMICS; SHEAR CRACKS; PROPAGATION AB We describe the first of two large-scale atomic simulation projects on materials failure performed on the 12-teraflop ASCI (Accelerated Strategic Computing Initiative) White computer at Lawrence Livermore National Laboratory. This is a multimillion-atom simulation study of crack propagation in rapid brittle fracture where the cracks travel faster than the speed of sound. Our finding centers on a bilayer solid that behaves under large strain like an interface crack between a soft (linear) material and a stiff (nonlinear) material. We verify that the crack behavior is dominated by the local (nonlinear) wave speeds, which can be in excess of the conventional sound speeds of a solid. C1 IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA. TJ Watson Res Lab, Yorktown Hts, NY 10598 USA. Max Planck Inst Met Res, D-70569 Stuttgart, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Abraham, FF (reprint author), IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA. RI Gao, Huajian/F-9360-2010 NR 23 TC 85 Z9 85 U1 0 U2 8 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 30 PY 2002 VL 99 IS 9 BP 5777 EP 5782 DI 10.1073/pnas.062012699 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 548FK UT WOS:000175377800008 PM 16578876 ER PT J AU Abraham, FF Walkup, R Gao, HJ Duchaineau, M De la Rubia, TD Seager, M AF Abraham, FF Walkup, R Gao, HJ Duchaineau, M De la Rubia, TD Seager, M TI Simulating materials failure by using up to one billion atoms and the world's fastest computer: Work-hardening SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID PLASTICITY; DYNAMICS; FRACTURE; MECHANISM AB We describe the second of two large-scale atomic simulation projects on materials failure performed on the 12-teraflop ASCI (Accelerated Strategic Computing Initiative) White computer at the Lawrence Livermore National Laboratory. This investigation simulates ductile failure by using more than one billion atoms where the true complexity of the creation and interaction of hundreds of dislocations are revealed. C1 IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA. TJ Watson Res Lab, Yorktown Hts, NY 10598 USA. Max Planck Inst Met Res, D-70569 Stuttgart, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Abraham, FF (reprint author), IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA. RI Gao, Huajian/F-9360-2010 NR 14 TC 80 Z9 82 U1 0 U2 10 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 30 PY 2002 VL 99 IS 9 BP 5783 EP 5787 DI 10.1073/pnas.062054999 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 548FK UT WOS:000175377800009 PM 16578877 ER PT J AU Lee, SW Berger, SJ Martinovic, S Pasa-Tolic, L Anderson, GA Shen, YF Zhao, R Smith, RD AF Lee, SW Berger, SJ Martinovic, S Pasa-Tolic, L Anderson, GA Shen, YF Zhao, R Smith, RD TI Direct mass spectrometric analysis of intact proteins of the yeast large ribosomal subunit using capillary LC/FTICR SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID ELECTROSPRAY-IONIZATION; SACCHAROMYCES-CEREVISIAE; LIQUID-CHROMATOGRAPHY; ACIDIC PROTEINS; METHIONINE AMINOPEPTIDASE; LASER DESORPTION; ACETYLATION; MIXTURES; PHOSPHORYLATION; SPECIFICITIES AB Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry coupled with capillary reverse-phase liquid chromatography was used to characterize intact proteins from the large subunit of the yeast ribosome. High mass measurement accuracy, achieved by "mass locking" with an internal standard from a dual electrospray ionization source, allowed identification of ribosomal proteins. Analyses of the intact proteins revealed information on cotranslational and posttranslational modifications of the ribosomal proteins that included loss of the initiating methionine, acetylation, methylation, and proteolytic maturation. High-resolution separations permitted differentiation of protein isoforms having high structural similarity as well as proteins from their modified forms, facilitating unequivocal assignments. The study identified 42 of the 43 core large ribosomal subunit proteins and 58 (of 64 possible) core large subunit protein isoforms having unique masses in a single analysis. These results demonstrate the basis for the high-throughput analyses of complex mixtures of intact proteins, which we believe will be an important complement to other approaches for defining protein modifications and their changes resulting from physiological processes or environmental perturbations. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Smith, RD (reprint author), Korea Univ, Dept Chem, Seongbuk Gu, 1 Anam Dong, Seoul 136701, South Korea. RI Smith, Richard/J-3664-2012; Lee, Sang-Won/H-6760-2013 OI Smith, Richard/0000-0002-2381-2349; Lee, Sang-Won/0000-0002-5042-0084 NR 50 TC 132 Z9 156 U1 0 U2 16 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 30 PY 2002 VL 99 IS 9 BP 5942 EP 5947 DI 10.1073/pnas.082119899 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 548FK UT WOS:000175377800037 PM 11983894 ER PT J AU Fenniri, H Deng, BL Ribbe, AE Hallenga, K Jacob, J Thiyagarajan, P AF Fenniri, H Deng, BL Ribbe, AE Hallenga, K Jacob, J Thiyagarajan, P TI Entropically driven self-assembly of multichannel rosette nanotubes SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID TOBACCO MOSAIC-VIRUS; COLLAGEN FIBRILS; BORON-NITRIDE; ACID; MICROTUBULES; CHEMISTRY; TUBULES; POLYMER; DESIGN; RODS AB Rosette nanotubes are a new class of organic nanotubes obtained through the hierarchical self-assembly of low molecular weight synthetic modules in water. Here we demonstrate that these materials can serve as scaffolds for the supramolecular synthesis of multichannel nanotubular architectures and report on the discovery of their entropy-driven self-assembly process. C1 Purdue Univ, Herbert C Brown Lab Chem 1393, W Lafayette, IN 47907 USA. Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Fenniri, H (reprint author), Purdue Univ, Herbert C Brown Lab Chem 1393, W Lafayette, IN 47907 USA. RI Ribbe, Alexander/D-4988-2009 OI Ribbe, Alexander/0000-0002-9924-3429 NR 42 TC 105 Z9 106 U1 4 U2 31 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 30 PY 2002 VL 99 SU 2 BP 6487 EP 6492 DI 10.1073/pnas.032527099 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 550BN UT WOS:000175483900009 PM 11891281 ER PT J AU McElfresh, M Baesu, E Balhorn, R Belak, J Allen, MJ Rudd, RE AF McElfresh, M Baesu, E Balhorn, R Belak, J Allen, MJ Rudd, RE TI Combining constitutive materials modeling with atomic force microscopy to understand the mechanical properties of living cells SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID MEMBRANE; LIGAND AB The goal of this work is to study the properties of living cells and cell membranes by using atomic force microscopy. During atomic force microscopy (AFM) measurement, there is a strong mechanical coupling between the AFM tip and the cell. The purpose of this paper is to present a model of the overall mechanical response of the cell that allows us to separate out the mechanical response of the cell from the local surface interactions we wish to quantify. These local interactions include recognition (or binding) events between molecules bound to an AFM tip (e.g., an antibody) and molecules or receptors on the cell surface (e.g., the respective antigen). The computational model differs from traditional Hertzian contact models by explicitly taking into account the mechanics of the biomembrane and cytoskeleton. The model also accounts for the mechanical response of the living cell during arbitrary deformation. The indentation of a bovine sperm cell is used to test the validity of this model, and further experiments are proposed to fully parameterize the model. C1 Lawrence Livermore Natl Lab, Mat Res Inst, Livermore, CA 94550 USA. Univ Nebraska, Dept Engn Mech, Lincoln, NE 68588 USA. Biometrol Inc, Alameda, CA 94501 USA. RP McElfresh, M (reprint author), Lawrence Livermore Natl Lab, Mat Res Inst, L-418-7000 East Ave, Livermore, CA 94550 USA. NR 34 TC 31 Z9 32 U1 3 U2 15 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 30 PY 2002 VL 99 SU 2 BP 6493 EP 6497 DI 10.1073/pnas.082520599 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 550BN UT WOS:000175483900010 PM 11983924 ER PT J AU Lu, QM Mao, SS Mao, XL Russo, RE AF Lu, QM Mao, SS Mao, XL Russo, RE TI Delayed phase explosion during high-power nanosecond laser ablation of silicon SO APPLIED PHYSICS LETTERS LA English DT Article ID PULSE AB An important parameter for high-irradiance laser ablation is the ablation crater depth, resulting from the interaction of individual laser pulses on a targeted surface. The crater depth for laser ablation of single-crystal silicon shows a dramatic increase at a laser intensity threshold of approximately 2x10(10) W/cm(2), above which, large (micron-sized) particulates were observed to eject from the target. We present an analysis of this threshold phenomenon and demonstrate that thermal diffusion and subsequent explosive boiling after the completion of the laser pulse is a possible mechanism for the observed dramatic increase of the ablation depth. Calculations based on this delayed phase explosion model provide a satisfactory estimate of the measurements. In addition, we find that the shielding of an expanding mass plasma during laser irradiation has a profound effect on this threshold phenomenon. (C) 2002 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Russo, RE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 19 TC 112 Z9 118 U1 1 U2 22 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 29 PY 2002 VL 80 IS 17 BP 3072 EP 3074 DI 10.1063/1.1473862 PG 3 WC Physics, Applied SC Physics GA 544EB UT WOS:000175144300014 ER PT J AU Kim, K Hart, GLW Zunger, A AF Kim, K Hart, GLW Zunger, A TI Negative band gap bowing in epitaxial InAs/GaAs alloys and predicted band offsets of the strained binaries and alloys on various substrates SO APPLIED PHYSICS LETTERS LA English DT Article ID QUANTUM-WELLS; DEFORMATION POTENTIALS; OPTICAL-PROPERTIES; CHEMICAL TRENDS; SEMICONDUCTORS; DENSITY; DOTS; HETEROJUNCTIONS; SUPERLATTICES; IMPURITIES AB We use pseudopotential theory to provide (1) the band offsets of strained GaAs and InAs on various substrates and (2) the energies E-v(x) and E-c(x) of the valence and conduction bands of InxGa1-xAs alloy, as a function of composition. Results are presented for both the bulk alloy and for the alloy strained on InP or GaAs. We predict that while E-c(x) bows downward for relaxed bulk alloys, it bows upward for strained epitaxial alloys. The calculated alloy offsets are used to discuss electron and hole localization in this system. (C) 2002 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. No Arizona Univ, Dept Phys & Astron, Flagstaff, AZ 86011 USA. RP Kim, K (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Zunger, Alex/A-6733-2013; OI Hart, Gus L. W./0000-0002-6149-9234 NR 34 TC 13 Z9 14 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 29 PY 2002 VL 80 IS 17 BP 3105 EP 3107 DI 10.1063/1.1470693 PG 3 WC Physics, Applied SC Physics GA 544EB UT WOS:000175144300025 ER PT J AU Zhang, Y Mascarenhas, A Wang, LW AF Zhang, Y Mascarenhas, A Wang, LW TI Band alignment between GaAs and partially ordered GaInP SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRON-EMISSION MICROSCOPY; CHEMICAL VAPOR-DEPOSITION; SINGLE QUANTUM-WELLS; CONDUCTION-BAND; INTERFACE PROPERTIES; OFFSET; HETEROJUNCTION; PRESSURE; VALENCE; VOLTAGE AB An empirical pseudopotential method is used for calculating the band structure of partially CuPt ordered GaxIn1-xP alloy with order parameter eta varying from 0 to 1. Because the relative band alignments between the binaries (GaAs, GaP, and InP) are taken into account in the pseudopotential fitting, such a calculation naturally yields the conduction and valence band alignment between the GaInP alloy and GaAs, as well as shows how the alignments change with the order parameter. The band alignment is found to change from type I to type II at eta=0.46 (0.54) for x=0.50 (0.52), which is in good agreement with experimental data. (C) 2002 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, NERSC, Berkeley, CA 94720 USA. RP Zhang, Y (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 36 TC 15 Z9 15 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 29 PY 2002 VL 80 IS 17 BP 3111 EP 3113 DI 10.1063/1.1472478 PG 3 WC Physics, Applied SC Physics GA 544EB UT WOS:000175144300027 ER PT J AU Qian, Q Tyson, TA Kao, CC Croft, M Ignatov, AY AF Qian, Q Tyson, TA Kao, CC Croft, M Ignatov, AY TI Local magnetic ordering in La1-xCaxMnO3 determined by spin-polarized x-ray absorption spectroscopy SO APPLIED PHYSICS LETTERS LA English DT Article ID LAMNO3; STATE; SCATTERING; EMISSION; MN AB A systematic study of spin-dependent Mn K-edge x-ray absorption spectra was performed on La1-xCaxMnO3. By examining the changes in the pre-edge spectra with the temperature, a model of the excitation process is developed and used to predict the temperature dependent changes in the local magnetic ordering about Mn sites. The approach is of general applicability to perovskite systems. It can be used to determine the change in the local magnetic order (ferromagnetic versus antiferromagnetic) about a transition metal site upon going through a transition or as the result of external perturbations. (C) 2002 American Institute of Physics. C1 New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA. RP Tyson, TA (reprint author), New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA. NR 21 TC 17 Z9 18 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 29 PY 2002 VL 80 IS 17 BP 3141 EP 3143 DI 10.1063/1.1473700 PG 3 WC Physics, Applied SC Physics GA 544EB UT WOS:000175144300037 ER PT J AU Jia, JF Wang, JZ Liu, X Xue, QK Li, ZQ Kawazoe, Y Zhang, SB AF Jia, JF Wang, JZ Liu, X Xue, QK Li, ZQ Kawazoe, Y Zhang, SB TI Artificial nanocluster crystal: Lattice of identical Al clusters SO APPLIED PHYSICS LETTERS LA English DT Article ID SURFACE AB A two-dimensional artificial crystal, which is made up of artificial atoms-identical Al clusters with nanometer size and spacing, was fabricated by taking advantage of surface-mediated clustering on a growth template. In situ scanning tunneling microscopy analysis and first-principles total energy calculations were used to determine the atomic structure of the Al nanoclusters. The Al clusters exhibit more remarkable thermal stability than the In clusters we reported previously. Based on our systematic observations and calculations, the formation mechanism and the high stability of these magic clusters are discussed. (C) 2002 American Institute of Physics. C1 Chinese Acad Sci, Inst Phys, State Key Lab Surface Phys, Beijing 100080, Peoples R China. Chinese Acad Sci, Inst Phys, Int Ctr Quantum Struct, Beijing 100080, Peoples R China. Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan. 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 qkxue@aphy.iphy.ac.cn RI Kawazoe, Yoshiyuki/C-2998-2011; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Zhang, Shengbai/0000-0003-0833-5860 NR 12 TC 98 Z9 106 U1 3 U2 17 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 29 PY 2002 VL 80 IS 17 BP 3186 EP 3188 DI 10.1063/1.1474620 PG 3 WC Physics, Applied SC Physics GA 544EB UT WOS:000175144300052 ER PT J AU Omori, S Takiguchi, Y Suda, A Sugimoto, T Miyazawa, H Takiguchi, Y Tanabe, N Tatsumi, K Kimura, H Pardington, PE Chen, FQ Chen, DJ Kuriyama, T AF Omori, S Takiguchi, Y Suda, A Sugimoto, T Miyazawa, H Takiguchi, Y Tanabe, N Tatsumi, K Kimura, H Pardington, PE Chen, FQ Chen, DJ Kuriyama, T TI Suppression of a DNA double-strand break repair gene, Ku70, increases radio- and chemosensitivity in a human lung carcinoma cell line SO DNA REPAIR LA English DT Article DE DNA double-strand break repair; DNA repair; Ku70; ionizing radiation; antisense nucleic acid ID DEPENDENT PROTEIN-KINASE; X-RAY RESISTANCE; V(D)J RECOMBINATION; IONIZING-RADIATION; CATALYTIC SUBUNIT; END-BINDING; AUTOANTIGEN; MUTANTS; ANTIGEN; COMPLEMENTATION AB Ku70 protein, cooperating with Ku8O and DNA-dependent protein kinase (DNA-PK) catalytic subunit (DNA-PKcs), is involved in DNA double-strand break (DNA DSB) repair and V(D)J recombination. Recent studies have revealed increased ionizing radiosensitivity in Ku70-deficient cells. The presented study, using a human squamous cell lung carcinoma cell line, demonstrated that introduction of an antisense Ku70 nucleic acid made the cells more radio- and chemosensitive than the parental cells. Ku70 protein expression was suppressed in the cells with antisense Ku70 construct when compared to the wildtype cells. A relatively small but statistically significant increase in radiosensitivity of the cells was achieved by the introduction of the antisense Ku70. The increased radiosensitivity in vitro was accompanied by an approximately two-fold increase in alpha and alpha/beta values in a linear-quadratic model. The antisense Ku70 increased the chemosensitivity of the cells to some DNA-damaging agents such as bleomycin and methyl methanesulfonate, but not to cisplatin, mitomycin C, and paclitaxel. This system provides us with partial suppression of Ku70, and will be a useful experimental model for investigating the physiological roles of the DNA DSB repair gene. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Chiba Univ, Grad Sch Med, Dept Resp B2, Chuo Ku, Chiba 2608670, Japan. Nara Med Univ, Dept Internal Med 2, Nara, Japan. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. Los Alamos Natl Lab, Div Life Sci, Los Alamos, NM USA. RP Takiguchi, Y (reprint author), Chiba Univ, Grad Sch Med, Dept Resp B2, Chuo Ku, 1-8-1 Inohana, Chiba 2608670, Japan. EM yuichi@med.m.chiba-u.ac.jp NR 42 TC 57 Z9 68 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1568-7864 J9 DNA REPAIR JI DNA Repair PD APR 29 PY 2002 VL 1 IS 4 BP 299 EP 310 AR PII S1568-7864(02)00006-X DI 10.1016/S1568-7864(02)00006-X PG 12 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA 597YL UT WOS:000178248300004 PM 12509248 ER PT J AU Plass, R Bartelt, NC Kellogg, GL AF Plass, R Bartelt, NC Kellogg, GL TI Dynamic observations of nanoscale self-assembly on solid surfaces SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID LABYRINTHINE PATTERN-FORMATION; ENERGY-ELECTRON-MICROSCOPY; PERIODIC DOMAIN-STRUCTURES; PHASE-TRANSITIONS; COMPETING INTERACTIONS; CRYSTAL-SURFACES; LIPID MONOLAYERS; MAGNETIC FLUIDS; PB MONOLAYER; CU(111) AB Using low-energy electron microscopy, we find that Cu and Pb, arranged in single atomic layers on the Cu(111) surface, self-assemble into ordered, nanoscale domain patterns. The pattern type, feature size, and degree of long-range order vary controllably with surface composition and temperature. The continuous evolution of the domain structures from circular islands to stripes to 'inverted' islands with increasing Pb coverage agrees with theoretical predictions and simulations based on the existence of competing long- and short-range interactions. The details of the self-assembly process depend on a number of factors including temperature, surface morphology, and the presence of small amounts of sulfur. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Plass, R (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 51 TC 39 Z9 39 U1 0 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD APR 29 PY 2002 VL 14 IS 16 BP 4227 EP 4240 AR PII S0953-8984(02)30347-3 DI 10.1088/0953-8984/14/16/313 PG 14 WC Physics, Condensed Matter SC Physics GA 551ZV UT WOS:000175594600014 ER PT J AU Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alves, GA Amos, N Anderson, EW Arnoud, Y Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beaudette, F Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blessing, S Boehnlein, A Bojko, NI Borcherding, F Bos, K Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Crepe-Renaudin, S Cummings, MAC Cutts, D Davis, GA Davis, K De, K de Jong, SJ Del Signore, K Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doulas, S Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Duperrin, A Dyshkant, A Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Feher, S Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Fox, H Frame, KC Fu, S Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Gomez, G Goncharov, PI Solis, JLG Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Graham, G Grannis, PD Green, JA Greenlee, H Greenwood, ZD Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hanlet, P Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinmiller, JM Heinson, AP Heintz, U Heuring, T Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahl, W Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Ke, Z Kehoe, R Khanov, A Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kothari, B Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Lee, WM Leflat, A Leggett, C Lehner, F Li, J Li, QZ Li, X Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Mauritz, KM May, B Mayorov, AA McCarthy, R McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Nagy, E Nang, F Narain, M Narasimham, VS Neal, HA Negret, JP Negroni, S Nomerotski, A Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Para, A Parashar, N Partridge, R Parua, N Paterno, M Patwa, A Pawlik, B Perkins, J Peters, M Peters, O Petroff, P Piegaia, R Pope, BG Popkov, E Prosper, HB Protopopescu, S Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Ridel, M Rijssenbeek, M Rizatdinova, F Rockwell, T Roco, M Royon, C Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Sajot, G Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Singh, JB Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stichelbaut, F Stoker, D Stolin, V Stone, A Stoyanova, DA Strauss, M Strovink, M Stutte, L Sznajder, A Talby, M Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM Vaniev, V Van Kooten, R Varelas, N Vertogradov, LS Villeneuve-Seguier, F Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wightman, JA Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Xu, Q Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Youssef, S Yu, J Yu, Z Zanabria, M Zhang, X Zheng, H Zhou, B Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A AF Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alves, GA Amos, N Anderson, EW Arnoud, Y Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beaudette, F Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blessing, S Boehnlein, A Bojko, NI Borcherding, F Bos, K Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Crepe-Renaudin, S Cummings, MAC Cutts, D Davis, GA Davis, K De, K de Jong, SJ Del Signore, K Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doulas, S Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Duperrin, A Dyshkant, A Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Feher, S Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Fox, H Frame, KC Fu, S Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Gomez, G Goncharov, PI Solis, JLG Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Graham, G Grannis, PD Green, JA Greenlee, H Greenwood, ZD Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hanlet, P Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinmiller, JM Heinson, AP Heintz, U Heuring, T Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahl, W Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Ke, Z Kehoe, R Khanov, A Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kothari, B Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Lee, WM Leflat, A Leggett, C Lehner, F Li, J Li, QZ Li, X Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Mauritz, KM May, B Mayorov, AA McCarthy, R McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Nagy, E Nang, F Narain, M Narasimham, VS Neal, HA Negret, JP Negroni, S Nomerotski, A Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Para, A Parashar, N Partridge, R Parua, N Paterno, M Patwa, A Pawlik, B Perkins, J Peters, M Peters, O Petroff, P Piegaia, R Pope, BG Popkov, E Prosper, HB Protopopescu, S Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Ridel, M Rijssenbeek, M Rizatdinova, F Rockwell, T Roco, M Royon, C Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Sajot, G Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Singh, JB Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stichelbaut, F Stoker, D Stolin, V Stone, A Stoyanova, DA Strauss, M Strovink, M Stutte, L Sznajder, A Talby, M Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM Vaniev, V Van Kooten, R Varelas, N Vertogradov, LS Villeneuve-Seguier, F Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wightman, JA Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Xu, Q Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Youssef, S Yu, J Yu, Z Zanabria, M Zhang, X Zheng, H Zhou, B Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A CA D0 Collaboration TI Search for the scalar top quark in p(p)over-bar collisions at root s= 1.8 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID ROOT-S=189 GEV; E(+)E(-) COLLISIONS; PARTICLE PHYSICS; PAIR PRODUCTION; BOTTOM QUARKS; SUPERSYMMETRY; CHARGINOS; SQUARK; LEP; NEUTRALINOS AB We have performed a search for scalar top quark (stop) pair production in the inclusive electron-muon-missing transverse energy final state, using a sample of p (p) over bar events corresponding to 108.3 pb (-1) of data collected with the D0 detector at Fermilab. The search is done in the framework of the minimal supersymmetric standard model assuming that the sneutrino is the lightest supersymmetric particle. For the dominant decays of the lightest stop, (t) over tilde-->b (χ) over tilde (+)(1) and (t) over tilde-->bl (ν) over tilde , no evidence for signal is found. We derive cross-section limits as a function of stop ((t) over tilde), chargino ((χ) over tilde (+)(1)), and sneutrino ((ν) over tilde ) masses. C1 Joint Nucl Res Inst, Dubna, Russia. Univ Buenos Aires, Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil. Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ, Ctr Particle Phys, Prague, Czech Republic. Acad Sci Czech Republ, Ctr Particle Phys, Inst Phys, Prague, Czech Republic. Univ San Francisco Quito, Quito, Ecuador. Univ Grenoble 1, CNRS, IN203, Inst Sci Nucl, Grenoble, France. Univ Mediterranee, CNRS, IN2P3, CPPM, Marseille, France. CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France. Univ Paris 06, LPNHE, IN2P3, CNRS, Paris, France. Univ Paris 07, LPNHE, IN2P3, CNRS, Paris, France. CEA, Serv Phys Particles, DAPNIA, Saclay, France. Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Mumbai, India. Seoul Natl Univ, Seoul, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. NIKHEF, FOM Inst, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Inst Nucl Phys, Krakow, Poland. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci Technol & Med, London, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Hawaii, Honolulu, HI 96822 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Illinois, Chicago, IL 60607 USA. No Illinois Univ, De Kalb, IL 60115 USA. Northwestern Univ, Evanston, IL 60208 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Iowa State Univ, Ames, IA 50011 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Univ Maryland, College Pk, MD 20742 USA. Boston Univ, Boston, MA 02215 USA. Northeastern Univ, Boston, MA 02115 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Nebraska, Lincoln, NE 68588 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Rochester, NY 14627 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Langston Univ, Langston, OK 73050 USA. Univ Oklahoma, Norman, OK 73019 USA. Brown Univ, Providence, RI 02912 USA. Univ Texas, Arlington, TX 76019 USA. Texas A&M Univ, College Stn, TX 77843 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Abazov, VM (reprint author), Joint Nucl Res Inst, Dubna, Russia. RI Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; Santoro, Alberto/E-7932-2014; Belyaev, Alexander/F-6637-2015; Kim, Sun Kee/G-2042-2015; Chekulaev, Sergey/O-1145-2015; Sznajder, Andre/L-1621-2016; Canelli, Florencia/O-9693-2016; Peters, Michael/B-4973-2009; Nomerotski, Andrei/A-5169-2010; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko, Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Merkin, Mikhail/D-6809-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De, Kaushik/N-1953-2013 OI Belyaev, Alexander/0000-0002-1733-4408; Kim, Sun Kee/0000-0002-0013-0775; Sznajder, Andre/0000-0001-6998-1108; Canelli, Florencia/0000-0001-6361-2117; Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X; De, Kaushik/0000-0002-5647-4489 NR 40 TC 14 Z9 14 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 29 PY 2002 VL 88 IS 17 AR 171802 DI 10.1103/PhysRevLett.88.171802 PG 6 WC Physics, Multidisciplinary SC Physics GA 542QA UT WOS:000175054700013 PM 12005745 ER PT J AU Feldman, DE AF Feldman, DE TI Critical exponents of the random-field O(N) model SO PHYSICAL REVIEW LETTERS LA English DT Article ID LONG-RANGE ORDER; ISING-MODEL; 4-EPSILON DIMENSIONS; SYSTEMS; SYMMETRY; MEDIA AB The critical behavior of the random-field Ising model has long been a puzzle. Different methods predict that its critical exponents in D dimensions are the same as in the pure (D - 2) -dimensional ferromagnet with the same number of the magnetization components contrary to the experiments and simulations. We calculate the exponents of the random-field O(N) model with the (4 + epsilon) -expansion and obtain values different from the exponents of the pure ferromagnet in 2 + epsilon dimensions. An infinite set of relevant operators missed in previous studies leads to a breakdown of the (6 - epsilon) -expansion. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. LD Landau Theoret Phys Inst, Chernogolovka 142432, Moscow Region, Russia. RP Feldman, DE (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 24 TC 35 Z9 35 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 29 PY 2002 VL 88 IS 17 AR 177202 DI 10.1103/PhysRevLett.88.177202 PG 4 WC Physics, Multidisciplinary SC Physics GA 542QA UT WOS:000175054700049 PM 12005781 ER PT J AU Hasan, MZ Montano, PA Isaacs, ED Shen, ZX Eisaki, H Sinha, SK Islam, Z Motoyama, N Uchida, S AF Hasan, MZ Montano, PA Isaacs, ED Shen, ZX Eisaki, H Sinha, SK Islam, Z Motoyama, N Uchida, S TI Momentum-resolved charge excitations in a prototype one-dimensional Mott insulator SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY-SCATTERING; ELECTRONIC-STRUCTURE; COPPER OXIDES; SEPARATION; SPIN; TRANSITION; SRCUO2; SUPERCONDUCTIVITY; PHOTOEMISSION; SR2CUO3 AB We report momentum-resolved charge excitations in a one-dimensional (1D) Mott insulator studied using high resolution inelastic x-ray scattering over the entire Brillouin zone for the first time. Excitations at the insulating gap edge are found to be highly dispersive (momentum dependent) compared to excitations observed in two-dimensional Mott insulators. The observed dispersion in 1D cuprates (SrCuO2 and Sr2CuO3) is consistent with charge excitations involving holons which is unique to spin-1/2 quantum chain systems. These results point to the potential utility of momentum-resolved inelastic x-ray scattering in providing valuable information about electronic structure of strongly correlated insulators. C1 Princeton Univ, Dept Phys, Princeton, NJ USA. Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA. Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60115 USA. Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan. RP Hasan, MZ (reprint author), Princeton Univ, Dept Phys, Princeton, NJ USA. RI HASAN, M. Zahid/D-8237-2012 NR 32 TC 70 Z9 70 U1 0 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 29 PY 2002 VL 88 IS 17 AR 177403 DI 10.1103/PhysRevLett.88.177403 PG 4 WC Physics, Multidisciplinary SC Physics GA 542QA UT WOS:000175054700052 PM 12005784 ER PT J AU Trombettoni, A Smerzi, A Bishop, AR AF Trombettoni, A Smerzi, A Bishop, AR TI Superfluidity versus disorder in the discrete nonlinear Schrodinger equation SO PHYSICAL REVIEW LETTERS LA English DT Article ID WAVE-GUIDE ARRAYS; OSCILLATIONS; SOLITONS AB We study the discrete nonlinear Schrodinger equation (DNLS) in an annular geometry with on-site defects. The dynamics of a traveling plane-wave maps onto an effective nonrigid pendulum Hamiltonian. The different regimes include the complete reflection and refocusing of the initial wave, solitonic structures, and a superfluid state. In the superfluid regime, which occurs above a critical value of nonlinearity, a plane wave travels coherently through the randomly distributed defects. This superfluidity criterion for the DNLS is analogous to (yet very different from) the Landau superfluidity criteria in translationally invariant systems. Experimental implications for the physics of Bose-Einstein condensate gases trapped in optical potentials and of arrays of optical fibers are discussed. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Ist Nazl Fis Mat, I-34014 Trieste, Italy. Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy. RP Trombettoni, A (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 20 TC 21 Z9 22 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 29 PY 2002 VL 88 IS 17 AR 173902 DI 10.1103/PhysRevLett.88.173902 PG 4 WC Physics, Multidisciplinary SC Physics GA 542QA UT WOS:000175054700023 PM 12005755 ER PT J AU Xu, J Moxom, J Overbury, SH White, CW Mills, AP Suzuki, R AF Xu, J Moxom, J Overbury, SH White, CW Mills, AP Suzuki, R TI Quantum antidot formation and correlation to optical shift of gold nanoparticles embedded in MgO SO PHYSICAL REVIEW LETTERS LA English DT Article ID METAL-CLUSTERS; MOLECULE; SIZE AB Quantum antidots are subnanometer scale vacancy clusters, the localized electronic structure of which can significantly alter the properties of a nanomaterial. We use positron spectroscopy to study vacancy clusters generated during the formation of gold nanoparticles via ion implantation in an MgO matrix. We observed that quantum antidots are associated with the nanoparticle surfaces after annealing in an O-2 atmosphere, but not after annealing in a H-2 atmosphere. In the former case, the presence of quantum antidots bound to the gold nanoparticles correlates with the redshift of the gold surface plasmon resonance, thus allowing an explanation for the redshift based on the transfer of electrons away from the metal particles. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Electrotech Lab, Tsukuba, Ibaraki 305, Japan. RP Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RI Overbury, Steven/C-5108-2016 OI Overbury, Steven/0000-0002-5137-3961 NR 17 TC 21 Z9 21 U1 1 U2 10 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 29 PY 2002 VL 88 IS 17 AR 175502 DI 10.1103/PhysRevLett.88.175502 PG 4 WC Physics, Multidisciplinary SC Physics GA 542QA UT WOS:000175054700035 PM 12005767 ER PT J AU Hasegawa, T Kageyama, T Fukumura, T Okazaki, N Kawasaki, M Koinuma, H Yoo, YK Duewer, F Xiang, XD AF Hasegawa, T Kageyama, T Fukumura, T Okazaki, N Kawasaki, M Koinuma, H Yoo, YK Duewer, F Xiang, XD TI High-throughput characterization of composition-spread manganese oxide films with a scanning SQUID microscope SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 1st Japan/USA Workshop on Combinatorial Materials Science and Technology CY OCT 01-03, 2000 CL MAUI, HAWAII DE manganese oxide; thin film; combinatorial technique; scanning SQUID microscope; magnetic phase diagram ID TRANSITIONS AB We have performed high-throughput characterization of composition-spread La1-xCaxMnO3 (LCMO) and Nd1-xSrxMnO3 (NSMO) films, fabricated by the precursor technique, with a scanning SQUID microscope (SSM). In both films, SSM successfully observed spatial variation of magnetic field, corresponding to magnetic phase transitions with respect to chemical composition. The obtained magnetic phase diagrams basically reproduced those reported in bulk materials. However, several distinctive differences have also been noted. For instance, the re-ion identified as a charge ordered insulator in LCMO revealed intense field, suggesting the occurrence of phase separation into ferromagnetic and non-magnetic states. These results confirm that SSM possesses sufficient analytical performance for high-throughput characterization of combinatorial magnetic libraries in composition spread form. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan. COMET, Midori Ku, Yokohama, Kanagawa 2268503, Japan. Tokyo Inst Technol, Dept Innovat & Engineered Mat, Midori Ku, Yokohama, Kanagawa 2268502, Japan. Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Hasegawa, T (reprint author), Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan. RI Kawasaki, Masashi/B-5826-2008; Fukumura, Tomoteru/C-2081-2009; Xiang, Xiaodong/A-9445-2012 OI Fukumura, Tomoteru/0000-0002-8957-3520; NR 11 TC 7 Z9 7 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD APR 28 PY 2002 VL 189 IS 3-4 BP 210 EP 215 AR PII S0169-4332(01)01011-X DI 10.1016/S0169-4332(01)01011-X PG 6 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 571RZ UT WOS:000176733600007 ER PT J AU Christen, HM Silliman, SD Harshavardhan, KS AF Christen, HM Silliman, SD Harshavardhan, KS TI Epitaxial superlattices grown by a PLD-based continuous compositional-spread technique SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 1st Japan/USA Workshop on Combinatorial Materials Science and Technology CY OCT 01-03, 2000 CL MAUI, HAWAII DE pulsed laser deposition; combinatorial materials synthesis; continuous compositional-spread; perovskite thin films; epitaxial superlattices ID PULSED-LASER DEPOSITION; THIN-FILM; COMBINATORIAL SYNTHESIS; FABRICATION; DISCOVERY; OXIDE; MBE AB A recently introduced continuous compositional-spread (CCS) technique-based on the non-uniformity of the deposition rate typically observed in pulsed laser deposition (PLD) is applied to the growth of epitaxial superlattices. This PLD-CCS method uses rapid (sub-monolayer) sequential deposition of the phase spread's constituents, whereby a pseudo-binary or pseudo-ternary phase diagram can be deposited without the need for masks or a post-anneal. Consequently, combinatorial materials synthesis can be carried out under optimized film growth conditions (e.g., complex oxides can be grown at high-temperatures). Most importantly, lifting the requirement of a post-anneal to promote interdiffusion and crystallization renders this method applicable to the growth of epitaxial heterostructures. Results are shown for the case of superlattices consisting of a repeated stacking of SrTiO3 and (SrxBa1-x)ZrO3 layers, where the parameter x varies continuously across the sample. Because all of these samples are obtained in one single deposition, and because the approach is easily generalized to pseudo-ternary systems, the PLD-CCS method results in significant timesavings for studies of epitaxial superlattices. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Neocera Inc, Beltsville, MD 20705 USA. Intel Massachusetts Inc, Hudson, MA 01749 USA. RP Christen, HM (reprint author), Oak Ridge Natl Lab, Div Solid State, POB 2008,Bldg 3150,M-S 6056, Oak Ridge, TN 37831 USA. RI Christen, Hans/H-6551-2013 OI Christen, Hans/0000-0001-8187-7469 NR 15 TC 14 Z9 15 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD APR 28 PY 2002 VL 189 IS 3-4 BP 216 EP 221 AR PII S0169-4332(01)01012-1 DI 10.1016/S0169-4332(01)01012-1 PG 6 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 571RZ UT WOS:000176733600008 ER PT J AU Wang, Q Perkins, J Branz, HM Alleman, J Duncan, C Ginley, D AF Wang, Q Perkins, J Branz, HM Alleman, J Duncan, C Ginley, D TI Combinatorial synthesis of solid state electronic materials for renewable energy applications SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 1st Japan/USA Workshop on Combinatorial Materials Science and Technology CY OCT 01-03, 2000 CL MAUI, HAWAII DE combinatorial synthesis; sputtering; HWCVD; p-type TCO; thin film Si ID ALLOY SOLAR-CELLS; MICROCRYSTALLINE SILICON; ELECTRICAL-CONDUCTION; THIN-FILMS; EFFICIENCY; DEPOSITION; TRANSITION; DILUTION AB We report on the development of new combinatorial capabilities for both the synthesis of new solid state opto-electronic materials and optimization of existing materials for renewable energy applications especially photovoltaic devices. Some of the important materials for these renewable energy applications include semiconductors (such as for absorber layers), transparent conductors, energy storage materials and more. In this paper, we focus on the application of a combinatorial approach to two specific material areas, transparent conducting oxides and thin film Si. In the former case, libraries are generated by sputtering and in the latter by the hot-wire chemical vapor deposition. The application of a combinatorial approach to these materials areas can greatly accelerate the rate of discovery and optimization of new materials and the optimization of devices. We report on the development of tools for the production and characterization of libraries and on initial important results in both of these areas. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Wang, Q (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 21 TC 22 Z9 22 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD APR 28 PY 2002 VL 189 IS 3-4 BP 271 EP 276 AR PII S0169-4332(01)01024-8 DI 10.1016/S0169-4332(01)01024-8 PG 6 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 571RZ UT WOS:000176733600017 ER PT J AU Melechko, AV Merkulov, VI Lowndes, DH Guillorn, MA Simpson, ML AF Melechko, AV Merkulov, VI Lowndes, DH Guillorn, MA Simpson, ML TI Transition between 'base' and 'tip' carbon nanofiber growth modes SO CHEMICAL PHYSICS LETTERS LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; FIELD-EMISSION; ELECTRON-MICROSCOPY; PATTERNED GROWTH; NANOTUBES; CATHODE AB Carbon nanofibers (CNFs) have been synthesized by catalytically controlled dc glow discharge plasma-enhanced chemical vapor deposition (PECVD). Both base-type and tip-type nanofibers have been produced on identical substrates. We have observed a sharp transition between these two growth modes by controlling the kinetics of the growth process without changing the substrate and catalyst materials. This transition is brought about by changing the parameters used in the deposition process such as the flow ratio of the carbonaceous and etchant gasses and others, This study of the initial growth stages as a function of time for both regimes provides a basis for a model of the growth mode transition. (C) 2002 Published by Elsevier Science B.V. C1 Oak Ridge Natl Lab, MENT Res Grp, Oak Ridge, TN 37831 USA. Univ Tennessee, CEB, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, TFNMP, Oak Ridge, TN 37831 USA. Univ Tennessee, DECE, Knoxville, TN 37996 USA. RP Melechko, AV (reprint author), Oak Ridge Natl Lab, MENT Res Grp, POB 2008,MS 6006, Oak Ridge, TN 37831 USA. RI Melechko, Anatoli/B-8820-2008; Simpson, Michael/A-8410-2011 OI Simpson, Michael/0000-0002-3933-3457 NR 25 TC 53 Z9 53 U1 1 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD APR 26 PY 2002 VL 356 IS 5-6 BP 527 EP 533 AR PII S0009-2614(02)00406-2 DI 10.1016/S0009-2614(02)00406-2 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 548FY UT WOS:000175379000016 ER PT J AU Ding, FX Schreiber, D VerBerkmoes, NC Becker, JM Naider, F AF Ding, FX Schreiber, D VerBerkmoes, NC Becker, JM Naider, F TI The chain length dependence of helix formation of the second transmembrane domain of a G protein-coupled receptor of Saccharomyces cerevisiae SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID ALPHA-FACTOR RECEPTOR; TRANSFORM INFRARED-SPECTROSCOPY; CIRCULAR-DICHROISM; MEMBRANE-PROTEINS; LIPID BILAYERS; ATR-FTIR; ELECTRON CRYSTALLOGRAPHY; 3-DIMENSIONAL STRUCTURE; AMINO-ACIDS; ORIENTATION AB The chain length dependence of helix formation of transmembrane peptides in lipids was investigated using fragments corresponding to the second transmembrane domain of the alpha-factor receptor from Saccharomyces cerevisiae. Seven peptides with chain lengths of 10 (M2-10; FKYLLSNYSS), 14 (M2-14), 18 (M2-18),22 (M2-22),26 (M2-26),30 (M2-30) and 35 (M2-35; RSRKTPIFIINQVSLFLIILH-SALYFKYLLSNYSS) residues, respectively, were synthesized. CD spectra revealed that M2-10 was disor- dered, and all of the other peptides assumed partially a-helical secondary structures in 99% trifluoroethanol (TFE)/H2O. In 50% TFE/H2O, M2-30 assumed a beta-like structure. The other six peptides exhibited the same CD patterns as those found in 99% TFE/H2O. In 1,2-dimyristoyl-sn-glycero-3-phosphocholine/1,2-dimyristoyl-sn-glycero-3-phospho-rac-(1-glycerol) (4:1 ratio) vesicles, M2-22, M2-26, and M2-35 formed alpha-helical structures, whereas the other peptides formed beta-like structures. Fourier transform infrared spectroscopy in 1,2-dimyristoyl-sn-glycero-3-phosphocholine/1,2-dimyristoyl-sn-glycero-3-phospho- rac-(1-glycerol) (4:1) multilayers showed that M2-10, M2-14, M2-18, and M2-30 assumed beta-structures in this environment. Another homologous 30-residue pep- tide (M2-30B), missing residues SNYSS from the N terminus and extending to RSRKT on the C terminus, was helical in lipid bilayers, suggesting that residues at the termini of transmembrane domains influence their biophysical properties. Attenuated total reflection Fourier transform infrared spectroscopy revealed that M2-22, M2-26, M2-30B, and M2-35 were alpha-helical and oriented at angles of 12degrees, 13degrees, 36degrees, and 34degrees, respectively, with respect to the multilayer normal. This study showed that chain length must be taken into consideration when using peptides representing single transmembrane domains as surrogates for regions of an intact receptor. Furthermore, this work indicates that the tilt angle and conformation of transmembrane portions of G protein-coupled receptors may be estimated by detailed spectroscopic measurements of single transmembrane peptides. C1 CUNY Coll Staten Isl, Dept Chem, Staten Isl, NY 10314 USA. Univ Tennessee, Oak Ridge Natl Lab, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37830 USA. Oak Ridge Natl Lab, Organ & Biol Mass Spect Grp, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Biochem Cellular & Mol Biol, Knoxville, TN 37996 USA. Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA. RP Naider, F (reprint author), CUNY Coll Staten Isl, Dept Chem, Staten Isl, NY 10301 USA. FU NIGMS NIH HHS [GM22086, GM22087] NR 61 TC 11 Z9 12 U1 0 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD APR 26 PY 2002 VL 277 IS 17 BP 14483 EP 14492 DI 10.1074/jbc.M111382200 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 545EH UT WOS:000175203000019 PM 11854278 ER PT J AU Mihlbachler, K Kaczmarski, K Seidel-Morgenstern, A Guiochon, G AF Mihlbachler, K Kaczmarski, K Seidel-Morgenstern, A Guiochon, G TI Measurement and modeling of the equilibrium behavior of the Troger's base enantiomers on an amylose-based chiral stationary phase SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE enantiomer separation; chiral stationary phases; LC; adsorption isotherm; multilayer adsorption; equilibrium-dispersive model; Troger's base ID ADSORPTION-ISOTHERMS; CHROMATOGRAPHY AB The binary isotherms of the two enantiomers of Troger's base were measured on a system made of pure 2-propanol as the mobile phase and of Chiralpak AD, a chiral stationary phase (CSP) based on amylose tri-(3,5-dimethylphenyl carbamate). The experimental data were acquired using both frontal analysis and the perturbation method, The results obtained are most unusual, The adsorption of the more-retained (-)-enantiomer is not competitive: the amount adsorbed onto the CSP at equilibrium with a constant concentration of the (-)-enantiomer is independent of the concentration of the (+) enantiomer. On the other hand, the adsorption of the less-retained enantiomer is cooperative: the amount of this (+)-enantiomer adsorbed by the CSP at equilibrium with a constant concentration of this enantiomer increases with increasing concentration of the (-)-enantiomer. Such a phenomenon has hardly ever been reported. A model equation is proposed that accounts well for all these isotherm data. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. Univ Magdeburg, Dept Chem Engn, D-39106 Magdeburg, Germany. Rzeszow Univ Technol, Rzeszow, Poland. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. OI Seidel-Morgenstern, Andreas/0000-0001-8595-7810 NR 29 TC 60 Z9 60 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD APR 26 PY 2002 VL 955 IS 1 BP 35 EP 52 AR PII S0021-9673(02)00228-5 DI 10.1016/S0021-9673(02)00228-5 PG 18 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 549FL UT WOS:000175433800004 PM 12061562 ER PT J AU Gerasimov, MR Ferrieri, RA Schiffer, WK Logan, J Gatley, SJ Gifford, AN Alexoff, DA Marstellar, DA Shea, C Garza, V Carter, P King, P Ashby, CR Vitkun, S Dewey, SL AF Gerasimov, MR Ferrieri, RA Schiffer, WK Logan, J Gatley, SJ Gifford, AN Alexoff, DA Marstellar, DA Shea, C Garza, V Carter, P King, P Ashby, CR Vitkun, S Dewey, SL TI Study of brain uptake and biodistribution of [C-11]toluene in non-human primates and mice SO LIFE SCIENCES LA English DT Article DE PET; inhalants; drug abuse; pharmacokinetics; biodistribution; primates ID DOPAMINE TRANSPORTER OCCUPANCY; POSITRON EMISSION TOMOGRAPHY; TOLUENE-BASED ADHESIVES; RENAL TUBULAR-ACIDOSIS; ORGANIC-SOLVENTS; BUTANE GAS; ABUSE; COCAINE; RATS; EXPOSURE AB Inhalant abuse is a rapidly growing health problem particularly among adolescents. Yet we know little about the neural mechanisms underlying the abuse liability of inhalants, particularly when compared to other addictive drugs. Specifically, our understanding of the relationship between the regional brain pharmacokinetics and features classically associated with drug reinforcement is lacking. Under the hypothesis that the abuse liability of toluene can be related to its pharmacokinctic properties and the pattern of regional brain uptake, we developed the methodology for radiolabeling and purifying [C-11]toluene for use in PET studies. Here we report the regional brain distribution and kinetics of the widely abused solvent toluene in non-human primates and the whole body biodistribution in mice. To our knowledge. this is the first reported study of the in vivo brain pharmacokinetics of labeled toluene in non-human primates. Rapid uptake of radioactivity into striatal and frontal regions was followed by rapid clearance from the brain. Concurrent findings in rodents indicate similar radiotracer kinetics, with excretion through kidneys and liver. Taken together, our data provides insight into phan-nacokinetic features possibly associated with the abuse liability of toluene. Published by Elsevier Science Inc. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. St Johns Univ, Dept Pharmaceut Hlth Sci, Jamaica, NY 11439 USA. SUNY Stony Brook, Dept Anesthesiol, Stony Brook, NY 11956 USA. RP Gerasimov, MR (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. NR 81 TC 30 Z9 30 U1 2 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0024-3205 J9 LIFE SCI JI Life Sci. PD APR 26 PY 2002 VL 70 IS 23 BP 2811 EP 2828 AR PII S0024-3205(02)01542-4 DI 10.1016/S0024-3205(02)01542-4 PG 18 WC Medicine, Research & Experimental; Pharmacology & Pharmacy SC Research & Experimental Medicine; Pharmacology & Pharmacy GA 564EB UT WOS:000176301100009 PM 12269385 ER PT J AU Hawsey, RA Peterson, DE AF Hawsey, RA Peterson, DE TI Another look at MgB2 and YBCO wires SO SCIENCE LA English DT Letter C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Hawsey, RA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD APR 26 PY 2002 VL 296 IS 5568 BP 655 EP 655 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 546PD UT WOS:000175281700021 PM 11985354 ER PT J AU Mason, T AF Mason, T TI URRs and Nobel Prizes SO SCIENCE LA English DT Letter C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Mason, T (reprint author), Oak Ridge Natl Lab, 701 Scarboro Rd, Oak Ridge, TN 37830 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD APR 26 PY 2002 VL 296 IS 5568 BP 656 EP 657 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 546PD UT WOS:000175281700025 PM 11985357 ER PT J AU Allan, BA Armstrong, RC Wolfe, AP Ray, J Bernholdt, DE Kohl, JA AF Allan, BA Armstrong, RC Wolfe, AP Ray, J Bernholdt, DE Kohl, JA TI The CCA core specification in a distributed memory SPMD framework SO CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE LA English DT Article; Proceedings Paper CT 1st SIAM Conference on Computational Science and Engineering CY SEP 21-24, 2000 CL WASHINGTON, D.C. SP SIAM DE common component architecture; high-performance computing; CCAFFEINE; peer components; SPMD; framework AB We present an overview of the Common Component Architecture (CCA) core specification and CCAFFEINE, a Sandia National Laboratories framework implementation compliant with the draft specification. CCAFFEINE stands for CCA Fast Framework Example In Need of Everything; that is, CCAFFEINE is fast, lightweight, and it alms to provide every 'framework service' by using external, portable components instead of integrating all services into a single, heavy framework core. By fast, we mean that the CCAFFEINE glue does not get between components in a way that slows down their interactions. We present the CCAFFEINE solutions to several fundamental problems in the application of component software approaches to the construction of single program multiple data (SPMD) applications. We demonstrate the integration of components from three organizations, two within Sandia and one at Oak Ridge National Laboratory. We outline some requirements for key enabling facilities needed for a successful component approach to SPMD application building. Copyright (C) 2002 John Wiley Sons, Ltd. C1 Sandia Natl Labs, Livermore, CA 94551 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Armstrong, RC (reprint author), Sandia Natl Labs, MS 9217,POB 969, Livermore, CA 94551 USA. NR 18 TC 41 Z9 42 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1532-0626 J9 CONCURR COMP-PRACT E JI Concurr. Comput.-Pract. Exp. PD APR 25 PY 2002 VL 14 IS 5 BP 323 EP 345 DI 10.1002/cpe.651 PG 23 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA 550ZU UT WOS:000175535600002 ER PT J AU Hornung, RD Kohn, SR AF Hornung, RD Kohn, SR TI Managing application complexity in the SAMRAI object-oriented framework SO CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE LA English DT Article; Proceedings Paper CT 1st SIAM Conference on Computational Science and Engineering CY SEP 21-24, 2000 CL WASHINGTON, D.C. SP SIAM DE object-oriented programming; design patterns; adaptive mesh refinement ID ADAPTIVE MESH REFINEMENT; SIMULATION MONTE-CARLO; EQUATIONS; FLOWS AB A major challenge facing software libraries for scientific computing is the ability to provide adequate flexibility to meet sophisticated, diverse, and evolving application requirements. Object-oriented design techniques are valuable tools for capturing characteristics of complex applications in a software architecture. In this paper, we describe certain prominent object-oriented features of the SAMRAI software library that have proven to be useful in application development. SAMRAI is used in a variety of applications and has demonstrated a substantial amount of code and design re-use in those applications. This flexibility and extensibility is illustrated with three different application codes. We emphasize two important features of our design. First, we describe the composition of complex numerical algorithms from smaller components which are usable in different applications. Second, we discuss the extension of existing framework components to satisfy new application needs. Published in 2002 by John Wiley Sons, Ltd. C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. RP Hornung, RD (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, POB 808,L-561, Livermore, CA 94551 USA. NR 37 TC 68 Z9 70 U1 1 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1532-0626 J9 CONCURR COMP-PRACT E JI Concurr. Comput.-Pract. Exp. PD APR 25 PY 2002 VL 14 IS 5 BP 347 EP 368 DI 10.1002/cpe.652 PG 22 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA 550ZU UT WOS:000175535600003 ER PT J AU Carnevale, GF Orlandi, P Zhou, Y Kloosterziel, RC AF Carnevale, GF Orlandi, P Zhou, Y Kloosterziel, RC TI Rotational suppression of Rayleigh-Taylor instability SO JOURNAL OF FLUID MECHANICS LA English DT Article AB It is demonstrated that the growth of the mixing zone generated by Rayleigh-Taylor instability can be greatly retarded by the application of rotation, at least for low Atwood number flows for which the Boussinesq approximation is valid. This result is analysed in terms of the effect of the Coriolis force on the vortex rings that propel the bubbles of fluid in the mixing zone. C1 Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA. Univ Roma La Sapienza, Dipartimento Meccan & Aeronaut, I-00184 Rome, Italy. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Hawaii, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA. RP Carnevale, GF (reprint author), Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA. NR 7 TC 10 Z9 10 U1 1 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4221 USA SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD APR 25 PY 2002 VL 457 BP 181 EP 190 DI 10.1017/S0022112002007772 PG 10 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 547WA UT WOS:000175354500007 ER PT J AU Elphic, RC Lawrence, DJ Feldman, WC Barraclough, BL Gasnault, OM Maurice, S Lucey, PG Blewett, DT Binder, AB AF Elphic, RC Lawrence, DJ Feldman, WC Barraclough, BL Gasnault, OM Maurice, S Lucey, PG Blewett, DT Binder, AB TI Lunar prospector neutron spectrometer constraints on TiO2 SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article DE titanium; composition; Moon; basalt; mare; ilmenite ID EPITHERMAL NEUTRONS; THORIUM ABUNDANCES; MARE BASALTS; SURFACE; FLUXES; MOON; FEO AB [1] Lunar Prospector neutron spectrometer measurements of the epithermal and thermal neutron leakage fluxes are used to provide constraints on TiO2 abundances in lunar surface materials. We use FeO abundance estimates based on both Clementine spectral reflectance techniques and preliminary Lunar Prospector gamma ray spectrometer determinations to first establish a model thermal neutron absorption due to all major elements except titanium. Then we remove the additional absorbing effects due to the rare earth elements gadolinium and samarium by using Lunar Prospector gamma ray spectrometer thorium abundances as a rare earth element proxy. The result can be compared to the ratio of epithermal to thermal neutron fluxes, which point to the presence of the additional thermal neutron absorber, titanium. We can derive abundance estimates of TiO2 and compare to other estimates derived spectroscopically. Our results show a significantly lower abundance of TiO2 than has been derived using Clementine data. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Observ Midi Pyrenees, F-31400 Toulouse, France. Univ Hawaii Manoa, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA. Univ Arizona Sci & Technol, Lunar Res Inst, Tucson, AZ 85747 USA. RP Elphic, RC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Lawrence, David/E-7463-2015; Gasnault, Olivier/F-4327-2010; Blewett, David/I-4904-2012 OI Lawrence, David/0000-0002-7696-6667; Gasnault, Olivier/0000-0002-6979-9012; Blewett, David/0000-0002-9241-6358 NR 29 TC 43 Z9 43 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD APR 25 PY 2002 VL 107 IS E4 AR 5024 DI 10.1029/2000JE001460 PG 11 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 609MB UT WOS:000178906500001 ER PT J AU Paulus, UA Wokaun, A Scherer, GG Schmidt, TJ Stamenkovic, V Radmilovic, V Markovic, NM Ross, PN AF Paulus, UA Wokaun, A Scherer, GG Schmidt, TJ Stamenkovic, V Radmilovic, V Markovic, NM Ross, PN TI Oxygen reduction on carbon-supported Pt-Ni and Pt-Co alloy catalysts SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID SOLID-POLYMER-ELECTROLYTE; FUEL-CELLS; DISK ELECTRODE; THIN-FILM; O-2 REDUCTION; PLATINUM; ELECTROCATALYSTS; KINETICS; TEMPERATURE; MICROELECTRODE AB We describe a comparative study of the oxygen reduction reaction on two carbon-supported Pt-based alloy catalysts in aqueous acidic electrolyte at low temperature. Both alloys have the bulk compositions of 50 and 75 at. % Pt, with the alloying elements being Ni and Co. Comparison is made to a pure Pt catalyst on the same carbon support, Vulcan XC-72, having the same metal loading (20 wt %) and nominally the same particle size (4 +/- 2 nm). High-resolution electron microscopy was used to determine the size and shape of the particles as well as the particle size distribution on all catalysts. Electrochemical measurements were performed using the thin-film rotating ring-disk electrode method in 0.1 M HClO4 at 20-60 degreesC. Hydrogen adsorption pseudocapacitance was used to determine the number of Pt surface atoms and to estimate the surface composition of the alloy catalysts. Kinetic analysis in comparison to pure Pt revealed a small activity enhancement (per Pt surface atom) of ca. 1.5 for the 25 at. % Ni and Co catalysts, and a more significant enhancement of a factor of 2-3 for the 50 at. % Co. The 50 at. % Ni catalyst was less active than the Pt standard and unstable at oxygen electrode potentials. Ring-current collection measurements for peroxide indicated no significant differences between the Pt-Co catalysts or the 25 at. % Ni catalyst and pure Pt, while the 50 at. % Ni catalyst had a higher peroxide yield. Together with the observed Tafel slopes and activation energies, it was concluded that the kinetic enhancement is contained in the preexponential factor of the conventional transition state theory rate expression. It is, however, not clear why the alloying with Ni or Co produces this change in the preexponential factor. C1 Paul Scherrer Inst, Lab Electrochem, CH-5232 Villigen, Switzerland. Univ Calif Berkeley, Lawrence Berkeley Lab, Mat Sci Div, Berkeley, CA 94720 USA. RP Paul Scherrer Inst, Lab Electrochem, CH-5232 Villigen, Switzerland. EM ursula.paulus@psi.ch RI Schmidt, Thomas/A-2586-2010 OI Schmidt, Thomas/0000-0002-1636-367X NR 40 TC 668 Z9 677 U1 39 U2 345 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD APR 25 PY 2002 VL 106 IS 16 BP 4181 EP 4191 DI 10.1021/jp013442l PG 11 WC Chemistry, Physical SC Chemistry GA 544PT UT WOS:000175169700022 ER PT J AU Lamoreaux, SK AF Lamoreaux, SK TI Relativity - Testing times in space SO NATURE LA English DT Editorial Material C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. RP Lamoreaux, SK (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. NR 8 TC 4 Z9 4 U1 0 U2 1 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD APR 25 PY 2002 VL 416 IS 6883 BP 803 EP 804 DI 10.1038/416803a PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 544MH UT WOS:000175163800035 PM 11976666 ER PT J AU Reitz, B van den Berg, AM Frekers, D Hofmann, F de Huu, M Kalmykov, Y Lenske, H von Neumann-Cosel, P Ponomarev, VY Rakers, S Richter, A Schrieder, G Schweda, K Wambach, J Wortche, HJ AF Reitz, B van den Berg, AM Frekers, D Hofmann, F de Huu, M Kalmykov, Y Lenske, H von Neumann-Cosel, P Ponomarev, VY Rakers, S Richter, A Schrieder, G Schweda, K Wambach, J Wortche, HJ TI Direct evidence for an orbital magnetic quadrupole twist mode in nuclei SO PHYSICS LETTERS B LA English DT Article DE reactions Ni-58(e, e '); Ni-58(p, p '); deduced orbital M2 twist mode; quasiparticle-phonon model calculations; comparison to hydrodynamical model ID 180-DEGREES ELECTRON-SCATTERING; MESON-EXCHANGE CURRENTS; ISOVECTOR M1 STRENGTH; INTERMEDIATE ENERGIES; DIPOLE RESPONSE; SPIN; ISOSPIN; SI-28; EXCITATIONS; TRANSITIONS AB The reactions Ni-58(e, e') and M-58(p, p) have been studied at kinematics favorable for the excitation of J(pi) = 2(-) states by isovector spin-flip transitions with DeltaL = 1. There are states at an excitation energy E-X approximate to 10 MeV which are strongly excited in electron scattering but not in proton scattering, suggesting a predominantly orbital character. This is taken as direct evidence for the so-called twist mode in nuclei in which different layers of nuclear fluid in the upper and lower hemisphere counterrotate against each other. Microscopic quasiparticle-phonon model calculations which predict sizable orbital M2 strength at this excitation energy yield indeed a current flow pattern of the strongest transitions consistent with a twist-like motion. (C) 2002 Published by Elsevier Science B.V. C1 Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna, Russia. Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany. Univ Munster, Inst Kernphys, D-48149 Munster, Germany. Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany. RP Reitz, B (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RI van den Berg, Adriaan/P-6792-2015 NR 37 TC 21 Z9 21 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD APR 25 PY 2002 VL 532 IS 3-4 BP 179 EP 184 AR PII S0370-2693(02)01485-5 DI 10.1016/S0370-2693(02)01485-5 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 547VF UT WOS:000175352500005 ER PT J AU Albright, CH Geer, S AF Albright, CH Geer, S TI Comparison of LMA and LOW solar solution predictions in an SO(10) GUT model SO PHYSICS LETTERS B LA English DT Article DE neutrino factory; superbeams; LMA and LOW solutions ID GRAND UNIFIED MODEL; NEUTRINO OSCILLATIONS; CP VIOLATION; MESON SYSTEM; KAMLAND; HIGGS; B-8 AB Within the framework of an SO(10) GUT model that can accommodate both the LMA and LOW solar neutrino mixing solutions by appropriate choice of the right-handed Majorana matrix elements, we present explicit predictions for the neutrino oscillation parameters Deltam(21)(2), sin(2) 2theta(12), sin(2) 2theta(13), and delta(CP). Given the observed near maximality of the atmospheric mixing, the model favors the LMA solution and predicts that delta(CP) is small. The suitability of Neutrino Superbeams and Neutrino Factories for precision tests of the two model versions is discussed. (C) 2002 Published by Elsevier Science B.V. C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Albright, CH (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. OI Albright, Carl/0000-0002-2252-6359 NR 30 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD APR 25 PY 2002 VL 532 IS 3-4 BP 311 EP 317 AR PII S0370-2693(02)01575-7 DI 10.1016/S0370-2693(02)01575-7 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 547VF UT WOS:000175352500023 ER PT J AU McKeown, J Misra, A Kung, H Hoagland, RG Nastasi, M AF McKeown, J Misra, A Kung, H Hoagland, RG Nastasi, M TI Microstructures and strength of nanoscale Cu-Ag multilayers SO SCRIPTA MATERIALIA LA English DT Article DE Cu-Ag; metallic multilayers; nanostructured metals; nanoindentation; physical vapor deposition ID NI MULTILAYERS; THIN-FILMS; DEFORMATION; BEHAVIOR AB Cu-Ag multilayers were found to have lower peak hardness than Cu-Ni in spite of lower misfit dislocation spacing that is expected to increase the resistance of interfaces to glide dislocation transmission. This is attributed to misfit dislocation core spreading in the interface plane in Cu-Ag. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Misra, A (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, MS G755, Los Alamos, NM 87545 USA. RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012 NR 16 TC 81 Z9 88 U1 5 U2 36 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD APR 25 PY 2002 VL 46 IS 8 BP 593 EP 598 AR PII S1359-6462(02)00036-2 DI 10.1016/S1359-6462(02)00036-2 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 560RN UT WOS:000176095200007 ER PT J AU Westler, WM Frey, PA Lin, J Wemmer, DE Morimoto, H Williams, PG Markley, JL AF Westler, WM Frey, PA Lin, J Wemmer, DE Morimoto, H Williams, PG Markley, JL TI Evidence for a strong hydrogen bond in the catalytic dyad of transition-state analogue inhibitor complexes of chymotrypsin from proton-triton NMR isotope shifts SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID PEPTIDYL TRIFLUOROMETHYL KETONES; NUCLEAR MAGNETIC-RESONANCE; SERINE PROTEASES; TRIAD; SPECTROSCOPY; DEUTERIUM; EXCHANGE; BINDING C1 Univ Wisconsin, Dept Chem, Natl Magnet Resonance Facil Madison, Madison, WI 53706 USA. Univ Wisconsin, Enzyme Inst, Madison, WI 53706 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Natl Tritium Labeling Facil, Berkeley, CA 94720 USA. RP Markley, JL (reprint author), Univ Wisconsin, Dept Chem, Natl Magnet Resonance Facil Madison, 1101 Univ Ave, Madison, WI 53706 USA. FU NCRR NIH HHS [RR02301, RR01237] NR 25 TC 26 Z9 26 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD APR 24 PY 2002 VL 124 IS 16 BP 4196 EP 4197 DI 10.1021/ja017860f PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 543EN UT WOS:000175088600014 PM 11960433 ER PT J AU Giotto, MV Sangiorge, CL Harris, DJ deOliveira, AL Schmidt-Rohr, K Bonagamba, TJ AF Giotto, MV Sangiorge, CL Harris, DJ deOliveira, AL Schmidt-Rohr, K Bonagamba, TJ TI Phase behavior and dynamics of the ABA triblock copolymer poly(ethylene glycol) distearate doped with alkali metal salts SO MACROMOLECULES LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; TEMPERATURE-DEPENDENCE; POLYMER ELECTROLYTES; SEGMENTAL MOBILITY; DISORDER MODEL; OXIDE); CONDUCTIVITY; DISTEREATE; COMPLEXES; SYSTEMS AB The ABA triblock copolymer poly(ethylene glycol) distearate (PEGD), average M-n ca. 930, complexed with lithium and sodium perchlorates has been studied by H-1, Li-7, C-13, and Na-23 solid-state nuclear magnetic resonance (NMR), SAXS, DSC, and polarized-light optical microscopy. Unlike other solid polymer electrolytes, highly Li+-doped PEGD samples exhibit sharp Li-7 NMR quadrupolar powder patterns even at temperatures well above the melting point, indicating that this triblock copolymer is microphase separated and the dynamics in the PEG phase are anisotropic. Measurements of the Li-7 central transition line width in highly doped samples show three distinct line narrowings, due to the poly(ethylene glycol) glass transition (similar to-20 degreesC), the stearate melting point of the polymer (similar to35 degreesC), and an order-disorder transition (similar to72 degreesC). 23 Na NMR measurements yield similar results. SAXS, DSC, and optical microscopy with polarized light confirm the presence of a microphase-separated state up to similar to72 degreesC. 1 C-13 and H-1 NMR show that the segmental mobility in the ordered state is reduced compared to the isotropic melt. The results confirm the previously proposed order-disorder model to explain the dependence of the ionic conductivity on the lithium concentration for Li+-doped PEGD samples. C1 USP, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil. UFMG, ICEx, Dept Quim, BR-30161970 Belo Horizonte, MG, Brazil. Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA. UFMG, ICEx, Dept Fis, BR-30161970 Belo Horizonte, MG, Brazil. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Bonagamba, TJ (reprint author), USP, Inst Fis Sao Carlos, Caixa Postal 369, BR-13560970 Sao Carlos, SP, Brazil. RI Bonagamba, Tito/A-2166-2008; Sao Carlos Institute of Physics, IFSC/USP/M-2664-2016 NR 29 TC 10 Z9 10 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD APR 23 PY 2002 VL 35 IS 9 BP 3576 EP 3583 DI 10.1021/ma010515q PG 8 WC Polymer Science SC Polymer Science GA 543QF UT WOS:000175112100039 ER PT J AU Soroko, AV Ivanov, AL Butov, LV AF Soroko, AV Ivanov, AL Butov, LV TI Thermalization and photoluminescence kinetics of statistically-degenerate indirect excitons in GaAs/AlGaAs coupled quantum wells SO PHYSICA STATUS SOLIDI A-APPLIED RESEARCH LA English DT Article; Proceedings Paper CT 7th International Conference on Optics and Excitons in Confined Systems (OECS7) CY SEP 03-07, 2001 CL MONTPELLIER, FRANCE ID BOSE-GAS; CONDENSATION AB In order to model the very recent experimental data on the relaxation kinetics and photoluminescence (PL) dynamics of indirect excitons in high-quality GaAs/AlGaAs coupled quantum wells (QWs) at extremely low bath temperatures T-b = 0.05 K, we analyze, both analytically and numerically, the relevant quantum Boltzmann equation. We show that at large delay times after initial optical excitation, thermalization of QW excitons occurs through the nonequilibrium states, weakly correlates with the initial conditions, and depends only upon the two control parameters, T-b and the degeneracy temperature T-0. We present a generic solution of the quantum Boltzmann equation and compare it with the numerical simulations. Finally, we report the experimental and theoretical study on the radiative lifetime tau(opt) of quantum degenerate indirect excitons at low temperatures, 50 mK less than or equal to T-b less than or equal to 2 K. C1 Cardiff Univ, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, Wales. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Soroko, AV (reprint author), Cardiff Univ, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, Wales. NR 9 TC 1 Z9 1 U1 0 U2 1 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0031-8965 J9 PHYS STATUS SOLIDI A JI Phys. Status Solidi A-Appl. Res. PD APR 23 PY 2002 VL 190 IS 3 BP 719 EP 724 DI 10.1002/1521-396X(200204)190:3<719::AID-PSSA719>3.0.CO;2-3 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA 553CB UT WOS:000175657000022 ER PT J AU Gurevich, YG Logvinov, GN Aguirre, NM Perez, LM AF Gurevich, YG Logvinov, GN Aguirre, NM Perez, LM TI "Resonance" phenomena in thermal diffusion processes in two-layer structures SO APPLIED PHYSICS LETTERS LA English DT Article AB The dependence on the chopper frequency of the effective thermal diffusivity and effective thermal conductivity in photoacoustic experiments is discussed. The theoretical model of a two-layer structure at rear-surface illumination in the high frequency limit is considered. It is shown that the effective thermal diffusivity presents "resonance" while the effective thermal conductivity sharply changes its magnitude and sign. Such "resonant" behavior strongly depends on the surface thermal conductivities associated with the interface thermal contacts. (C) 2002 American Institute of Physics. C1 Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07000, DF, Mexico. Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. Inst Politecn Nacl, Unidad Profes Interdisciplinaria Ingn & Tecnol Av, Mexico City 07340, DF, Mexico. RP Gurevich, YG (reprint author), Inst Politecn Nacl, ESIME Culhuacan, Secc Estudios Posgrado Invest, Av Santa Anna 1000,Col San Francisco, Culhuacan 04430, DF, Mexico. RI Gurevich, Yuri/A-3620-2008 OI Gurevich, Yuri/0000-0001-9057-7425 NR 10 TC 6 Z9 6 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 22 PY 2002 VL 80 IS 16 BP 2898 EP 2900 DI 10.1063/1.1468899 PG 3 WC Physics, Applied SC Physics GA 542WQ UT WOS:000175068900027 ER PT J AU Zhang, YG Lee, PL Nolas, GS Wilkinson, AP AF Zhang, YG Lee, PL Nolas, GS Wilkinson, AP TI Gallium distribution in the clathrates Sr8Ga16Ge30 and Sr4Eu4Ga16Ge30 by resonant diffraction SO APPLIED PHYSICS LETTERS LA English DT Article ID THERMOELECTRIC-MATERIALS; THERMAL-CONDUCTIVITY; GE AB The distribution of gallium/germanium in the type-I clathrates Sr8Ga16Ge30 and Sr4Eu4Ga16Ge30 over the three crystallographically distinct framework sites has been determined by resonant diffraction. The analyses indicate a strong preference for the occupation of the 6c site by gallium. This is consistent with theoretical predictions, but contrary to the results of a previous neutron diffraction study. The gallium distribution, and, hence, the thermoelectric properties of these materials, may be amenable to manipulation by heat treatment. (C) 2002 American Institute of Physics. C1 Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA. Argonne Natl Lab, Adv Photon Source, SRI CAT, Argonne, IL 60439 USA. Univ S Florida, Dept Phys, Tampa, FL 33620 USA. RP Wilkinson, AP (reprint author), Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA. RI Wilkinson, Angus/C-3408-2008 OI Wilkinson, Angus/0000-0003-2904-400X NR 20 TC 45 Z9 47 U1 1 U2 11 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 22 PY 2002 VL 80 IS 16 BP 2931 EP 2933 DI 10.1063/1.1473236 PG 3 WC Physics, Applied SC Physics GA 542WQ UT WOS:000175068900038 ER PT J AU Grossman, JC Colvin, ME Tran, NL Louie, SG Cohen, ML AF Grossman, JC Colvin, ME Tran, NL Louie, SG Cohen, ML TI Aromaticity and hydrogenation patterns in highly strained fullerenes SO CHEMICAL PHYSICS LETTERS LA English DT Article ID SOLID C-36; BUCKMINSTERFULLERENE; C60H2 AB Gradient corrected density functional theory is applied to evaluate the structure and energetics of hydrogenation patterns in the C-36 molecule and its component fragments. Overall strain and resonance energies for these compounds are determined using homodesmotic reactions that connect C-36 and its constituent chemical components to simpler non-aromatic, unstrained compounds. Our calculations indicate that the dramatic difference in energetic stability between two similar solid C-36 structures is due to the number of disrupted aromatic rings rather than to differential strain. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Phys Directorate, Livermore, CA 94550 USA. Lawrence Livermore Natl Lab, Computat Biochem Grp, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RP Grossman, JC (reprint author), Lawrence Livermore Natl Lab, Phys Directorate, Mailstop L-415, Livermore, CA 94550 USA. NR 18 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD APR 22 PY 2002 VL 356 IS 3-4 BP 247 EP 253 AR PII S0009-2614(02)00307-X DI 10.1016/S0009-2614(02)00307-X PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 548UQ UT WOS:000175408600010 ER PT J AU Wang, Y Espenson, JH AF Wang, Y Espenson, JH TI Kinetics and mechanism of rhenium-catalyzed oxygen atom transfer from pyridine N-oxides to phosphines SO INORGANIC CHEMISTRY LA English DT Article ID ACTIVE-SITES; MONOMERIZATION; TUNGSTOENZYMES; SYSTEMS; MODEL; DIMER AB The oxygen atom transfer (OAT) reaction cited does not occur on its own in >10 h. Oxorhenium(V) compounds having the formula MeReO(dithiolate)PZ(3) catalyze the reaction; the catalyst most studied was MeReO(mtp)PPh3, 1, where mtpH(2) = 2-(mercaptomethyl)thiophenol. The mechanism was studied by multiple techniques. Kinetics (initial-rate and full-time-course methods) established this rate law: v = k(c)[1][PyO](2)[PPh3](-1). Here and elsewhere PyO symbolizes the general case XC5H4NO and PicO that with X = 4-Me. For 4-picoline, k(c) = (1.50 +/- 0.05) x 10(4) L mol(-1) s(-1) in benzene at 25.0 degreesC; the inverse phosphine dependence signals the need for the removal of phosphine from the coordination sphere of rhenium prior to the rate-controlling step (RCS). The actual entry of PPh3 into the cycle occurs in a fast step later in the catalytic cycle, after the RCS; its relative rate constants (k(4)) were evaluated with pairwise combinations of phosphines. Substituent effects were studied in three ways: for (YC6H4)(3)P, a Hammett correlation of k(c) against 3sigma gives the reaction constant rho(c)(P) = +1.03, consistent with phosphine predissociation; for PyO rho(c)(N) = -3.84. It is so highly negative because PyO enters in three steps, each of which is improved by a better Lewis base or nucleophile, and again for (YC6H4)(3)P as regards the k(4) step, rho(4) = -0.70, reflecting its role as a nucleophile in attacking a postulated dioxorhenium(VII) intermediate, The RCS is represented by the breaking of the covalent N-O bond within another intermediate inferred from the kinetics, [MeReO(mtp)(OPY)(2)], to yield the dioxorhenium(VII) species [MeRe(O)(2)(MtP)(OPY)], A close analogue, [MeRe(O)(2)(MtP)PiC], was identified by H-1 NMR spectroscopy at 240 K in toluene-d(8). The role of the "second" PyO in the rate law and reaction scheme is attributed to its providing nucleophilic assistance to the RCS, Addition of an exogenous nucleophile (tetrabutylammonium bromide, Py, or Pic) caused an accelerating effect. When Pic was used, the rate law took on the new form v = k(NA)[1][PicO][Pic][PPh3](-1); k(NA) = 2.6 x 10(2) L mol(-1) s(-1) at 25.0 degreesC in benzene, The ratio k(c)/k(NA) is 58, consistent with the Lewis basicities and nucleophilicities of PicO and Pic. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. RP Espenson, JH (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. NR 13 TC 34 Z9 34 U1 2 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD APR 22 PY 2002 VL 41 IS 8 BP 2266 EP 2274 DI 10.1021/ic0112995 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 543PN UT WOS:000175110500037 PM 11952384 ER PT J AU LaViolette, RA Harris, RA AF LaViolette, RA Harris, RA TI Chiral fluctuations in achiral clusters and liquids via molecular dynamics simulations SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VIBRATIONAL SPECTROSCOPY AB A chiral correlation function described previously [R. A. Harris, J. Chem. Phys. 115, 10577 (2001)] is employed here to detect chiral fluctuations in achiral systems. For the sake of illustration, classical constant volume and energy molecular dynamics simulations were employed in order to generate trajectories for each of the following systems: clusters of 4 to 119 water molecules in vacuum, a cluster of 6 water molecules in liquid carbon tetrachloride, the neat carbon tetrachloride liquid, and water itself. The power spectrum of the normalized chiral correlation function also has been calculated for each of these systems. The simulation results suggest that the chiral fluctuations, through their correlations, could give statistically significant signals from about 1 GHz for the liquids, to 10-100 GHz for either the solvated or the intermediate clusters, to 500 GHz-1 THz for the smallest clusters. (C) 2002 American Institute of Physics. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP LaViolette, RA (reprint author), Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. NR 18 TC 1 Z9 1 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD APR 22 PY 2002 VL 116 IS 16 BP 7104 EP 7108 DI 10.1063/1.1468425 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 541FB UT WOS:000174973600029 ER PT J AU Davids, B Anthony, DW Aumann, T Austin, SM Baumann, T Bazin, D Clement, RRC Lofy, PA Nakamura, T Sherrill, BM Yurkon, J Davids, CN Esbensen, H AF Davids, B Anthony, DW Aumann, T Austin, SM Baumann, T Bazin, D Clement, RRC Lofy, PA Nakamura, T Sherrill, BM Yurkon, J Davids, CN Esbensen, H TI A kinematically complete measurement of the Coulomb dissociation of B-8 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE ID E2 TRANSITIONS; CROSS-SECTION AB We present preliminary results of a kinematically complete measurement of the Coulomb dissociation of 83 MeV/u B-8 on a Pb target. A dipole magnet separated the unreacted beam from the breakup fragments. We measured the Coulomb dissociation cross section at low relative energies in order to extract the astrophysical S factor for the Be-7(p, gamma)B-8 reaction. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Michigan State Univ, Natl Supercond Cyclotron Lab, E Lansing, MI 48824 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Davids, B (reprint author), Michigan State Univ, Natl Supercond Cyclotron Lab, E Lansing, MI 48824 USA. RI Sherrill, Bradley/B-4098-2009; Sherrill, Bradley/B-3378-2011; Aumann, Thomas/B-1455-2012; Nakamura, Takashi/N-5390-2015 OI Nakamura, Takashi/0000-0002-1838-9363 NR 6 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 14C EP 17C AR PII S0375-9474(01)01538-X PG 4 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900004 ER PT J AU Grunder, HA AF Grunder, HA TI Radioactive nuclear beam facilities in north America: Status and outlook SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE AB Seven existing north American radioactive nuclear beam (RNB) facilities provide nuclear physics research opportunities. The US Rare-Isotope Accelerator (RIA) initiative promises enormously widened opportunities for the region via a highly flexible next-generation RN-B facility. (C) 2002 Published by Elsevier Science B.V. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Grunder, HA (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 0 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 43C EP 48C AR PII S0375-9474(01)01545-7 PG 6 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900010 ER PT J AU Nazarewicz, W Bender, M Cwiok, S Heenen, PH Kruppa, AT Reinhard, PG Vertse, T AF Nazarewicz, W Bender, M Cwiok, S Heenen, PH Kruppa, AT Reinhard, PG Vertse, T TI Theoretical description of superheavy nuclei SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE ID COLD-FUSION REACTIONS; BUBBLE NUCLEI; ELEMENTS; CA-48; DECAY AB The theory of the superheavy elements is reviewed with the main focus on nuclear structure aspects. The structure of the odd-N superheavy elements is investigated using a variety of self-consistent approaches. Microscopic shell corrections, extracted from Skyrme-Hartree-Fock and relativistic mean-field calculations, elucidate the question of the centre-of-shell-stability in the superheavy region. Finally, the existence of exotic configurations, having gross non-uniformities of nucleonic density, expected to occur in nuclei with very large atomic numbers, is addressed. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland. Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. ULB, Serv Phys Nucl Theor, B-1050 Brussels, Belgium. Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary. Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91058 Erlangen, Germany. RP Nazarewicz, W (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. NR 26 TC 14 Z9 14 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 165C EP 171C AR PII S0375-9474(01)01567-6 PG 7 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900032 ER PT J AU Rykaczewski, K McConnell, JW Bingham, CR Grzywacz, R Karny, M Batchelder, JC Gross, CJ Janas, Z Momayezi, M Wahl, J Piechaczek, A Zganjar, ER Ginter, TN Hamilton, JH Walters, WB Kulp, WD Winger, JA AF Rykaczewski, K McConnell, JW Bingham, CR Grzywacz, R Karny, M Batchelder, JC Gross, CJ Janas, Z Momayezi, M Wahl, J Piechaczek, A Zganjar, ER Ginter, TN Hamilton, JH Walters, WB Kulp, WD Winger, JA TI Towards new proton radioactivities with radioactive beams and digital signal processing SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE DE RADIOACTIVITY Cs-113 [from-Ni-58(Ni-58,p2n)] and Tm-146 [from Ni-58(Mo-92,p3n)]; measured Ep; recoil mass separation; Si detectors ID EMISSION; SYSTEM; DECAY AB Particle radioactivity studies using the XIA DGF-4C digital signal processing units at the Recoil Mass Separator of Oak Ridge National Laboratory are presented. Proton emission signals were observed starting from 500 ns after recoil implantation. An energy threshold below 100 keV for particle detection was achieved. For the Tm-145 and Tm-146 decay, evidence for the fine structure in proton emission was obtained. An experiment to search for a new proton emitter Lu-149 is described as an example where the combination of a Ni-56 radioactive beam and digital signal processing is a major advantage. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. Xray Instrumentat Associates, Newark, CA 94560 USA. Louisiana State Univ, Baton Rouge, LA 70803 USA. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Maryland, College Pk, MD 20742 USA. Georgia Inst Technol, Atlanta, GA 30341 USA. Mississippi State Univ, Mississippi State, MS 39762 USA. RP Rykaczewski, K (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. NR 17 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 179C EP 183C AR PII S0375-9474(01)01569-X PG 5 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900034 ER PT J AU Savard, G Schwartz, J Caggiano, J Greene, JP Heinz, A Maier, M Seweryniak, D Zabransky, BJ AF Savard, G Schwartz, J Caggiano, J Greene, JP Heinz, A Maier, M Seweryniak, D Zabransky, BJ TI ISOL beams from fragmentation: the best of both worlds SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE DE ISOL; radioactive beams; gas stopping ID ION AB A new method, based on in-flight fragment separation, stopping of the fragments as singly-charged ions in a large helium gas cell, and fast extraction, allows for a breakthrough in capabilities for the production of a broad range of radioactive beams. The scheme combines the intrinsic advantages of in-flight fragmentation, short delay times and universality, with those of the ISOL concept, high-quality beams of precise energy. A key component of this approach is the large stopping gas cell which utilizes DC and RF electric fields to quickly guide the radioactive ions to the exit of the cell, A prototype for this cell has been successfully built and tested at Argonne. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Savard, G (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Heinz, Andreas/E-3191-2014 NR 4 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 292C EP 295C AR PII S0375-9474(01)01601-3 PG 4 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900057 ER PT J AU Talbert, WL Drake, DM Wilson, MT Lenz, JW Hsu, HH AF Talbert, WL Drake, DM Wilson, MT Lenz, JW Hsu, HH TI Conductive cooling of high-power RIB targets SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE ID RADIOACTIVE ION-BEAMS; THICK TARGETS; ONLINE; RIST AB A short review is presented of target cooling approaches suggested for targets irradiated by intense high-energy proton beams to produce radioactive species for use in a broad range of physics studies, This work reports on conductive cooling approaches for operation at temperatures lower than effective for radiative cooling. The possibilities for conductive cooling are discussed, and a prototype test target is described. This target was constructed for an experiment, designed to validate the numerical analysis approaches, at the TRIUMF/ISAC facility. Fabrication issues and the results of the experiment are presented, followed by a discussion of the implications of the experiment outcome for future development of targets to produce intense beams of radioactive ions. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Amparo Corp, Santa Fe, NM 87504 USA. John Lenz & Associates, Waxahachie, TX 75165 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Talbert, WL (reprint author), Amparo Corp, POB 2687, Santa Fe, NM 87504 USA. NR 14 TC 6 Z9 6 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 303C EP 311C AR PII S0375-9474(01)01603-7 PG 9 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900059 ER PT J AU Nolen, JA Reed, CB Hassanein, A Gomes, IC AF Nolen, JA Reed, CB Hassanein, A Gomes, IC TI Liquid-lithium cooling for 100-kW ISOL and fragmentation targets SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE DE ISOL; fragmentation; targets; high power; exotic beams; radioactive beams; liquid lithium; liquid metal ID NEUTRON-PRODUCTION; ENERGY GENERATION; ACCELERATOR; REACTORS; PROTONS; BLANKET AB Advanced exotic beam facilities that axe currently being developed will use powerful driver accelerators for the production of short-lived rare isotopes. Multi-beam drivers capable of producing high power beams from very light to very heavy ions are now technically feasible. A challenge for such facilities is the development of production targets to be used for a variety of reaction mechanisms with beam powers of about 100 kW This paper presents engineering concepts that have been developed recently for using liquid lithium coolant for two types of targets. one for use with light-ion beams on high atomic number (Z) targets and the other for heavy-ion beams on low-Z targets. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Argonne Natl Lab, Technol Dev Div, Argonne, IL 60439 USA. Argonne Natl Lab, Energy Technol Div, Argonne, IL 60439 USA. RP Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. EM nolen@anl.gov NR 33 TC 7 Z9 7 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 EI 1873-1554 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 312C EP 322C AR PII S0375-9474(01)01604-9 PG 11 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900060 ER PT J AU Pieper, SC AF Pieper, SC TI Quantum Monte Carlo for light nuclei SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE DE GFMC; quantum Monte Carlo ID SCATTERING DATA AB Quantum Monte Carlo calculations using realistic two- and three-nucleon interactions are presented for nuclei with up to nine nucleons. Our Greens function Monte Carlo calculations are accurate to similar to1% for the binding energy. We have constructed Hamiltonians using the Argonne nu(18) NN interaction and reasonable three-nucleon interactions that reproduce the energies of these nuclear states with only similar to500 keV rms error. Other predictions, such as form factors, decay rates, and spectroscopic factors also agree well with data. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Pieper, SC (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 357C EP 362C AR PII S0375-9474(01)01610-4 PG 6 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900066 ER PT J AU Matsuta, K Tsubota, T Ha, C Miyake, T Sasaki, M Sato, K Minamisono, K Tanaka, K Kaminaka, S Takemura, A Sumikama, T Nagatomo, T Hashimoto, K Mihara, M Fukuda, M Minamisono, T Ohtsubo, T Nojiri, Y Momota, S Kitagawa, A Torikoshi, M Kanazawa, M Koda, S Nishio, T Suda, M Alonso, J Krebs, GF Symons, TJM AF Matsuta, K Tsubota, T Ha, C Miyake, T Sasaki, M Sato, K Minamisono, K Tanaka, K Kaminaka, S Takemura, A Sumikama, T Nagatomo, T Hashimoto, K Mihara, M Fukuda, M Minamisono, T Ohtsubo, T Nojiri, Y Momota, S Kitagawa, A Torikoshi, M Kanazawa, M Koda, S Nishio, T Suda, M Alonso, J Krebs, GF Symons, TJM TI Precise magnetic moment of short-lived beta emitter Ar-35 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE AB The magnetic moment of the short-lived beta emitter Ar-35 (I-pi = 3/2(+), T-1/2 = 1.77 s) has been remeasured by means of the combined technique of polarized nuclear beams and beta-NMR. The obtained magnetic moment is 0.6322(2) mu(N). This value is consistent with the old data, but is one order of more magnitude precise. The value is well reproduced by the shell model calculation. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan. Niigata Univ, Fac Sci, Niigata 95021, Japan. Kochi Univ Technol, Kochi 782, Japan. Natl Inst Radiol Sci, Chiba 263, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Matsuta, K (reprint author), Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan. NR 4 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 383C EP 386C AR PII S0375-9474(01)01615-3 PG 4 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900071 ER PT J AU Neyens, G Georgiev, G Grzywacz, R Hass, M Santos, FD Lewitowicz, M Balabanski, DL Bingham, C Borcea, C Coulier, N Coussement, R Daugas, JM Defrance, G Goldring, G Gorska, M Grawe, H O'Leary, C Macovei, I Mach, H Page, R Pfutzner, M Penionzkevich, YE Podolyak, Z Regan, PH Rykaczewski, K Sawicka, M Smirnova, NA Sobolev, Y Teughels, S Vyvey, K AF Neyens, G Georgiev, G Grzywacz, R Hass, M Santos, FD Lewitowicz, M Balabanski, DL Bingham, C Borcea, C Coulier, N Coussement, R Daugas, JM Defrance, G Goldring, G Gorska, M Grawe, H O'Leary, C Macovei, I Mach, H Page, R Pfutzner, M Penionzkevich, YE Podolyak, Z Regan, PH Rykaczewski, K Sawicka, M Smirnova, NA Sobolev, Y Teughels, S Vyvey, K TI g-factors of isomers around N approximate to 40, Z approximate to 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE DE nuclear structure; exotic nuclei; projectile fragmentation reactions; g-factors; Cu-69m; TDPAD ID NI-68; ALIGNMENT; NUCLEUS; STATES AB First and preliminary results of an experiment aimed at measuring g-factors of isomeric states in neutron-rich nuclei in the vicinity of Ni-68 are reported, Isomers near the predicted N = 40 sub-shell closure in Cu-69, Ni-67 and Co-66 have been populated in the fragmentation of a Ge-76, 61.4 MeV/u beam onto a 145 mg/cm(2) (9)Bc target at GANIL. Here we report the results for the 357(2) ns, I-pi = 13/2(+) isomer in Cu-69 for which a preliminary gyromagnetic ratio of \g\ = 0.195(9) was derived. The Larmor precession of the spin-oriented isomeric ensemble was measured by recording gamma-ion correlations in a 20 mus time window. This pioneering experiment has indicated interesting nuclear structure information and shows promising possibilities for future studies of this kind. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Katholieke Univ Leuven, IKS, B-3001 Louvain, Belgium. GANIL, F-14076 Caen 5, France. Univ Tennessee, Knoxville, TN 37996 USA. Weizmann Inst Sci, IL-76100 Rehovot, Israel. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. IAP, Bucharest, Romania. GSI Darmstadt, D-6100 Darmstadt, Germany. Warsaw Univ, IEP, Warsaw, Poland. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. JINR, FLNR, Dubna, Russia. Univ Surrey, Guildford GU2 7XH, Surrey, England. St Kliment Ohridski Univ Sofia, Fac Phys, Sofia, Bulgaria. Uppsala Univ, ISV, Studsvik, Sweden. RP Neyens, G (reprint author), Katholieke Univ Leuven, IKS, Celestijnenlaan 200 D, B-3001 Louvain, Belgium. RI Georgiev, Georgi/C-5110-2008 OI Georgiev, Georgi/0000-0003-1467-1764 NR 19 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 403C EP 409C AR PII S0375-9474(01)01618-9 PG 7 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900074 ER PT J AU Welton, RF AF Welton, RF CA HRIBF Staff TI The development of the F-17 beam at the Holifield radioactive ion beam facility SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 5th International Conference on Radioactive Nuclear Beams CY MAR 27-APR 01, 2000 CL DIVONNE, FRANCE SP CERN, ISOLDE ID SURFACE-IONIZATION; HIGH-EFFICIENCY; GENERATION AB This report details some of the key technological developments employed at the Holifield Radioactive Ion Beam Facility (HRIBF) to produce beams of F-17 using the O-16(d,n)F-17 reaction. The oxide fiber target material used at the HRIBF is described and a comparison is made between the F-17 yield achieved using light (AT) and heavy (Hf) metal oxide fibers. The development of the Kinetic Ejection Negative Ion Source (KENIS) employed in this work, is also discussed along with the operational principles of the source. Finally, a detailed description or the HfO2 target configuration used to produce 10(7)-10(8) F-17 ions/s for over 850 hours of operation is provided, To date, seven nuclear physics experiments using accelerated beams of F-17 and F-18 produced using this apparatus have been performed over an energy range of 10-170 MeV, (C) 2002 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Welton, RF (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 26 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD APR 22 PY 2002 VL 701 BP 452C EP 460C AR PII S0375-9474(01)01626-8 PG 9 WC Physics, Nuclear SC Physics GA 555LQ UT WOS:000175795900082 ER PT J AU Acosta, D Affolder, T Akimoto, H Albrow, MG Amaral, P Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, YS Ciobanu, CI Clark, AG Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S Done, J D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Fang, HC Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giannetti, P Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Ivanov, A Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, K Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Martin, V Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Renton, P Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Vaiciulis, T Valls, J Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Akimoto, H Albrow, MG Amaral, P Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Brubaker, E Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, YS Ciobanu, CI Clark, AG Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Dominguez, A Donati, S Done, J D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erbacher, R Errede, D Errede, S Fan, Q Fang, HC Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giannetti, P Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldstein, J Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Grim, G Gris, P Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Ivanov, A Iwai, J Iwata, Y James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Lee, K Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Martin, V Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Nelson, C Nelson, T Neu, C Neuberger, D Newman-Holmes, C Ngan, CYP Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Pescara, L Phillips, TJ Piacentino, G Pitts, KT Pompos, A Pondrom, L Pope, G Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rakitine, A Ratnikov, F Reher, D Reichold, A Renton, P Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonelli, D Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Vaiciulis, T Valls, J Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Upsilon production and polarization in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID OCTET QUARKONIA PRODUCTION; HADRONIC COLLISIONS; FERMILAB-TEVATRON; J/PSI; FRAGMENTATION AB We report on measurements of the Y(1S), Y(2S), and Y(3S) differential cross sections (d(2)sigma/dp(T)dy)(\y\<0.4) , as well as on the &UUpsilon;(1S) polarization in p<(p)over bar> collisions at roots = 1.8 TeV using a sample of 77+/-3 pb(-1) collected by the collider detector at Fermilab. The three resonances were reconstructed through the decay Y-->mu(+)mu(-) . The measured angular distribution of the muons in the Y(1S) rest frame is consistent with unpolarized meson production. C1 Univ Florida, Gainesville, FL 32611 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15218 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Illinois, Urbana, IL 61801 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 305, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. MIT, Cambridge, MA 02139 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. Univ Trieste Udine, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Acosta, D (reprint author), Univ Florida, Gainesville, FL 32611 USA. RI Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Gallas Torreira, Abraham Antonio/K-6508-2014; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Ruiz, Alberto/E-4473-2011; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Cabrera Urban, Susana/H-1376-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012 OI Ivanov, Andrew/0000-0002-9270-5643; Gallas Torreira, Abraham Antonio/0000-0002-2745-7954; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399 NR 19 TC 125 Z9 125 U1 1 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 161802 DI 10.1103/PhysRevLett.88.161802 PG 6 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400009 PM 11955190 ER PT J AU Affronte, M Cornia, A Lascialfari, A Borsa, F Gatteschi, D Hinderer, J Horvatic, M Jansen, AGM Julien, MH AF Affronte, M Cornia, A Lascialfari, A Borsa, F Gatteschi, D Hinderer, J Horvatic, M Jansen, AGM Julien, MH TI Observation of magnetic level repulsion in Fe6 : Li molecular antiferromagnetic rings SO PHYSICAL REVIEW LETTERS LA English DT Article ID ENTRAPPING ALKALINE IONS; TORQUE MAGNETOMETRY; ANISOTROPY; FE-10 AB Heat capacity (C), magnetic torque, and proton NMR relaxation rate (1/T-1) measurements were performed on Fe6:Li single crystals in order to study the crossings between S = 0 and S = 1 and between S = 1 and S = 2 magnetic states of the molecular rings, at magnetic fields B-c1 = 11.7 T and B-c2 = 22.4 T, respectively. C vs B data at 0.78 K show that the energy gap between two states remains finite at B-c 's (Delta(1)/k(B) = 0.86 K and Delta(2)/k(B) = 2.36 K) thus proving that levels repel each other. The large Delta(1) value may also explain the anomalously large width of the peak in 1/T-1 vs B, around B-c1. This anticrossing, unexpected in a centrosymmetric system, requires a revision of the Hamiltonian. C1 Univ Modena & Reggio Emilia, INFM, I-41100 Modena, Italy. Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy. Univ Modena & Reggio Emilia, INSTM, I-41100 Modena, Italy. Univ Modena & Reggio Emilia, Dipartimento Chim, I-41100 Modena, Italy. Univ Pavia, INFM, I-27100 Pavia, Italy. Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy. Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Univ Florence, INSTM, I-50019 Florence, Italy. Univ Florence, Dipartimento Chim, I-50019 Florence, Italy. CNRS, F-38042 Grenoble, France. MPI FKF, Grenoble High Magnet Field Lab, F-38042 Grenoble, France. Univ Grenoble 1, Spectrometrie Phys Lab, F-38402 St Martin Dheres, France. RP Affronte, M (reprint author), Univ Modena & Reggio Emilia, INFM, Via G Campi 213-A, I-41100 Modena, Italy. RI Gatteschi, Dante/B-5429-2008; Cornia, Andrea/N-8587-2015; Julien, Marc-Henri/A-2352-2010; Affronte, Marco/P-2504-2016 OI Cornia, Andrea/0000-0001-9765-3128; Affronte, Marco/0000-0001-5711-7822 NR 16 TC 49 Z9 49 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 167201 DI 10.1103/PhysRevLett.88.167201 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400038 PM 11955256 ER PT J AU Csaki, C Kaloper, N Terning, J AF Csaki, C Kaloper, N Terning, J TI Dimming supernovae without cosmic acceleration SO PHYSICAL REVIEW LETTERS LA English DT Article ID PARTICLE PHYSICS; MAGNETIC-FIELD; DOMAIN-WALLS; UNIVERSE; QUINTESSENCE; LIMITS; ENERGY; AXIONS AB We present a simple model where photons propagating in extragalactic magnetic fields can oscillate into very light axions. The oscillations may convert some of the photons, departing a distant supernova, into axions, making the supernova appear dimmer and hence more distant than it really is. Averaging over different configurations of the magnetic field we find that the dimming saturates at about one-third of the light from the supernovae at very large redshifts. This results in a luminosity distance versus redshift curve almost indistinguishable from that produced by the accelerating Universe, if the axion mass and coupling scale are m similar to 10(-16) eV , M similar to 4 x 10(11) GeV . This phenomenon may be an alternative to the accelerating Universe for explaining supernova observations. C1 Los Alamos Natl Lab, Theory Div T8, Los Alamos, NM 87545 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. RP Csaki, C (reprint author), Cornell Univ, Newman Lab Nucl Studies, Ithaca, NY 14853 USA. NR 32 TC 131 Z9 131 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 161302 DI 10.1103/PhysRevLett.88.161302 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400007 PM 11955225 ER PT J AU d'Astuto, M Mang, PK Giura, P Shukla, A Ghigna, P Mirone, A Braden, M Greven, M Krisch, M Sette, F AF d'Astuto, M Mang, PK Giura, P Shukla, A Ghigna, P Mirone, A Braden, M Greven, M Krisch, M Sette, F TI Anomalous dispersion of longitudinal optical phonons in Nd1.86Ce0.14CuO4+delta determined by inelastic x-ray scattering SO PHYSICAL REVIEW LETTERS LA English DT Article ID ENERGY RESOLUTION; LO PHONONS; LA1.85SR0.15CUO4 AB The phonon dispersions of Nd1.86Ce0.14CuO (4+delta) along the [xi, 0, 0] direction have been determined by inelastic x-ray scattering. Compared to the undoped parent compound, the two highest longitudinal phonon branches, associated with the Cu-O bond stretching and out-of-plane oxygen vibration, are shifted to lower energies. Moreover, an anomalous softening of the bond-stretching band is observed at about q=(0.2, 0, 0). These signatures provide evidence for strong electron-phonon coupling in this electron-doped high-temperature superconductor. C1 European Synchrotron Radiat Facil, F-38043 Grenoble, France. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Univ Pavia, Dipartimento Chim Fis M Rolla, I-27100 Pavia, Italy. Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany. Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. RP European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France. RI Shukla, Abhay/G-6753-2011; Ghigna, Paolo/G-8193-2011; d'Astuto, Matteo/F-8235-2013; giura, paola/E-3841-2017 OI d'Astuto, Matteo/0000-0002-7583-4427; NR 17 TC 69 Z9 69 U1 3 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 167002 DI 10.1103/PhysRevLett.88.167002 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400031 PM 11955249 ER PT J AU Dodin, IY Fisch, NJ AF Dodin, IY Fisch, NJ TI Storing, retrieving, and processing optical information by raman backscattering in plasmas SO PHYSICAL REVIEW LETTERS LA English DT Article ID GROUP-VELOCITY; PULSES AB By employing stimulated Raman backscattering in a plasma, information carried by a laser pulse can be captured in the form of a very slowly propagating plasma wave that persists for a time long compared with the pulse duration. If the plasma is then probed with a short laser pulse, the information stored in the plasma wave can be retrieved in a second scattered electromagnetic wave. The recording and retrieving processes can conserve robustly the pulse shape, thus enabling the recording and retrieving with fidelity of information stored in optical signals. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Dodin, IY (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 10 TC 24 Z9 24 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 165001 DI 10.1103/PhysRevLett.88.165001 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400018 PM 11955236 ER PT J AU Dziarmaga, J Smerzi, A Zurek, WH Bishop, AR AF Dziarmaga, J Smerzi, A Zurek, WH Bishop, AR TI Dynamics of quantum phase transition in an array of Josephson junctions SO PHYSICAL REVIEW LETTERS LA English DT Article ID COSMOLOGICAL EXPERIMENTS; DEFECT FORMATION AB We study the dynamics of the Mott insulator-superfluid quantum phase transition in a periodic 1D array of Josephson junctions. We show that crossing the critical point at a finite rate with a quench time tau(Q) induces finite quantum fluctuations of the current around the loop proportional to tau(Q)(-)(1/6). This scaling could be experimentally verified with an array of weakly coupled Bose-Einstein condensates or superconducting grains. C1 Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. Jagiellonian Univ, Inst Fizyki, PL-30059 Krakow, Poland. Ist Nazl Fis Mat, I-34014 Trieste, Italy. Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy. RP Dziarmaga, J (reprint author), Los Alamos Natl Lab, Div Theory, POB 1663, Los Alamos, NM 87545 USA. NR 28 TC 47 Z9 47 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 167001 DI 10.1103/PhysRevLett.88.167001 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400030 PM 11955248 ER PT J AU Erlebacher, J Aziz, MJ Chason, E Sinclair, MB Floro, JA AF Erlebacher, J Aziz, MJ Chason, E Sinclair, MB Floro, JA TI Comment on "Nonclassical smoothening of nanoscale surface corrugations" - Reply SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material ID SI(001) C1 Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. Brown Univ, Providence, RI 02912 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Erlebacher, J (reprint author), Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. RI Erlebacher, Jonah/A-3231-2010 NR 8 TC 4 Z9 4 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 169602 DI 10.1103/PhysRevLett.88.169602 PG 1 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400054 ER PT J AU Gao, XPA Mills, AP Ramirez, AP Pfeiffer, LN West, KW AF Gao, XPA Mills, AP Ramirez, AP Pfeiffer, LN West, KW TI Two-dimensional metal in a parallel magnetic field SO PHYSICAL REVIEW LETTERS LA English DT Article ID 2-DIMENSIONAL HOLE SYSTEM; 2 DIMENSIONS; INSULATOR-TRANSITION; SCALING THEORY; PHASE; BEHAVIOR; GAAS AB We have investigated the effect of an in-plane parallel magnetic field (B-parallel to) on two high mobility metalliclike dilute two-dimensional hole gas systems in GaAs quantum wells. The experiments reveal that, while suppressing the magnitude of the low temperature resistance drop, B-parallel to does not affect E-a, the characteristic energy scale of the metallic resistance drop. The field B-c at which the metalliclike resistance drop vanishes is dependent on both the width of the quantum well and the orientation of B-parallel to. It is unexpected that E-a is unaffected by B-parallel to up to B-c despite the fact that the Zeeman energy at B-c is roughly equal to E-a. C1 Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA. Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gao, XPA (reprint author), Bell Labs, Lucent Technol, 600 Mt Ave, Murray Hill, NJ 07974 USA. RI Schaff, William/B-5839-2009 NR 21 TC 26 Z9 26 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 166803 DI 10.1103/PhysRevLett.88.166803 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400029 PM 11955247 ER PT J AU Kim, KH Lee, S Noh, TW Cheong, SW AF Kim, KH Lee, S Noh, TW Cheong, SW TI Charge ordering fluctuation and optical pseudogap in La1-xCaxMnO3 SO PHYSICAL REVIEW LETTERS LA English DT Article ID MANGANITES; TRANSITION; POLARON; LA0.7CA0.3MNO3; ABSORPTION AB Optical spectroscopy was used to investigate the optical gap (2Delta) due to charge ordering (CO) and related pseudogap developments with x and temperature (T) in La1-xCaxMnO3 (0.48 less than or equal to x less than or equal to 0.67 ). Surprisingly, we found 2Delta/k(B)T(CO) is as large as 30 for x approximate to 0.5, and decreases rapidly with increasing x . Simultaneously, the optical pseudogap, possibly starting from T-* far above T-CO becomes drastically enhanced near x = 0.5 , producing non-BCS T-dependence of 2Delta with the large magnitude far above T-CO, and systematic increase of T-* for x approximate to 0.5. These results unequivocally indicate systematically enhanced CO correlation when x approaches 0.5 even though T-CO decreases. C1 Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea. Seoul Natl Univ, Res Ctr Oxide Elect, Seoul 151747, South Korea. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA. RP Kim, KH (reprint author), Los Alamos Natl Lab, Natl High Magnet Field Lab, MS E536, Los Alamos, NM 87845 USA. RI Noh, Tae Won /K-9405-2013 NR 28 TC 35 Z9 38 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 167204 DI 10.1103/PhysRevLett.88.167204 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400041 PM 11955259 ER PT J AU Kusenko, A Weiler, TJ AF Kusenko, A Weiler, TJ TI Neutrino cross sections and future observations of ultrahigh-energy cosmic rays SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRONGLY INTERACTING NEUTRINOS; SUPERHEAVY RELIC PARTICLES; ZATSEPIN-KUZMIN CUTOFF; AIR SHOWERS; DIMENSIONS; FLUX; HALO AB We show that future detectors of ultrahigh-energy cosmic-ray neutrinos will be able to measure neutrino-nucleon cross section, sigma(nuN) , at energies as high as 10(11) GeV or higher. We find that the flux of upgoing charged leptons per unit surface area produced by neutrino interactions below the surface is inversely proportional to sigma(nuN) . This contrasts with the rate of horizontal air showers (HAS) due to neutrino interactions in the atmosphere, which is proportional to sigma(nuN) . Thus, by comparing the HAS and upgoing air shower rates, the neutrino-nucleon cross section can be inferred. Taken together, upgoing and horizontal rates ensure a healthy total event rate, regardless of the value of sigma(nuN) . C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. RP Kusenko, A (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. NR 58 TC 61 Z9 61 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 161101 DI 10.1103/PhysRevLett.88.161101 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400004 PM 11955222 ER PT J AU Link, JM Reyes, M Yager, PM Anjos, JC Bediaga, I Gobel, C Magnin, J Massafferi, A de Miranda, JM Pepe, IM dos Reis, AC Carrillo, S Casimiro, E Cuautle, E Sanchez-Hernandez, A Uribe, C Vazquez, F Agostino, L Cinquini, L Cumalat, JP O'Reilly, B Ramirez, JE Segoni, I Butler, JN Cheung, HWK Gaines, I Garbincius, PH Garren, LA Gottschalk, E Kasper, PH Kreymer, AE Kutschke, R Bianco, S Fabbri, FL Zallo, A Cawlfield, C Kim, DY Rahimi, A Wiss, J Gardner, R Kryemadhi, A Chung, YS Kang, JS Ko, BR Kwak, JW Lee, KB Park, H Alimonti, G Boschini, M D'Angelo, P DiCorato, M Dini, P Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Mezzadri, M Milazzo, L Moroni, L Pedrini, D Pontoglio, C Prelz, F Rovere, M Sala, S Davenport, TF Arena, V Boca, G Bonomi, G Gianini, G Liguori, G Merlo, MM Pantea, D Ratti, SP Riccardi, C Vitulo, P Hernandez, H Lopez, AM Luiggi, E Mendez, H Mendez, L Mirles, A Montiel, E Olaya, D Paris, A Quinones, J Rivera, C Xiong, W Zhang, Y Wilson, JR Cho, K Handler, T Mitchell, R Engh, D Hosack, M Johns, WE Nehring, M Sheldon, PD Stenson, K Vaandering, EW Webster, M Sheaff, M AF Link, JM Reyes, M Yager, PM Anjos, JC Bediaga, I Gobel, C Magnin, J Massafferi, A de Miranda, JM Pepe, IM dos Reis, AC Carrillo, S Casimiro, E Cuautle, E Sanchez-Hernandez, A Uribe, C Vazquez, F Agostino, L Cinquini, L Cumalat, JP O'Reilly, B Ramirez, JE Segoni, I Butler, JN Cheung, HWK Gaines, I Garbincius, PH Garren, LA Gottschalk, E Kasper, PH Kreymer, AE Kutschke, R Bianco, S Fabbri, FL Zallo, A Cawlfield, C Kim, DY Rahimi, A Wiss, J Gardner, R Kryemadhi, A Chung, YS Kang, JS Ko, BR Kwak, JW Lee, KB Park, H Alimonti, G Boschini, M D'Angelo, P DiCorato, M Dini, P Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Mezzadri, M Milazzo, L Moroni, L Pedrini, D Pontoglio, C Prelz, F Rovere, M Sala, S Davenport, TF Arena, V Boca, G Bonomi, G Gianini, G Liguori, G Merlo, MM Pantea, D Ratti, SP Riccardi, C Vitulo, P Hernandez, H Lopez, AM Luiggi, E Mendez, H Mendez, L Mirles, A Montiel, E Olaya, D Paris, A Quinones, J Rivera, C Xiong, W Zhang, Y Wilson, JR Cho, K Handler, T Mitchell, R Engh, D Hosack, M Johns, WE Nehring, M Sheldon, PD Stenson, K Vaandering, EW Webster, M Sheaff, M CA FOCUS Collaboration TI A high statistics measurement of the Lambda(+)(c) lifetime SO PHYSICAL REVIEW LETTERS LA English DT Article AB A high statistics measurement of the Lambda(c)(+) lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis technique with particular attention to the determination of the systematic uncertainty. The measured value of 204.6+/-3.4 (stat )+/-2.5 (syst) fs from 8034+/-122 Lambda(c)(+) -->pK(-)pi(+) decays represents a significant improvement over the present world average. C1 Univ Calif Davis, Davis, CA 95616 USA. Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil. CINVESTAV, Mexico City 07000, DF, Mexico. Univ Colorado, Boulder, CO 80309 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Illinois, Urbana, IL 61801 USA. Indiana Univ, Bloomington, IN 47405 USA. Korea Univ, Seoul 136701, South Korea. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Milan, Milan, Italy. Univ N Carolina, Asheville, NC 28804 USA. Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Puerto Rico, Mayaguez, PR 00681 USA. Univ S Carolina, Columbia, SC 29208 USA. Univ Tennessee, Knoxville, TN 37996 USA. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Link, JM (reprint author), Univ Calif Davis, Davis, CA 95616 USA. RI Bonomi, Germano/G-4236-2010; Kwak, Jungwon/K-8338-2012; Link, Jonathan/L-2560-2013; Gobel Burlamaqui de Mello, Carla /H-4721-2016 OI Bonomi, Germano/0000-0003-1618-9648; Link, Jonathan/0000-0002-1514-0650; Gobel Burlamaqui de Mello, Carla /0000-0003-0523-495X NR 13 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 161801 DI 10.1103/PhysRevLett.88.161801 PG 5 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400008 ER PT J AU Su, YS Pantelides, ST AF Su, YS Pantelides, ST TI Diffusion mechanism of hydrogen in amorphous silicon: Ab initio molecular dynamics simulation SO PHYSICAL REVIEW LETTERS LA English DT Article ID SI-H; MODEL; METASTABILITY; SPECTRA AB The mechanism of H migration in amorphous Si has remained an unresolved problem. The main issue is the small activation energy (1.5 eV) relative to the known strength of Si-H bonds (2-3.5 eV). We report first-principles finite-temperature simulations which demonstrate vividly that H is not released spontaneously, as proposed by most models, but awaits the arrival of a floating bond (FB). The "migrating species" is an FB-H complex, with H jumping from Si to Si and the FB literally floating around it. Migration stops when the FB veers away. C1 Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37861 USA. RP Su, YS (reprint author), Integrated Syst Engn Inc, 111 N Market St,Suite 710, San Jose, CA 95113 USA. NR 27 TC 39 Z9 39 U1 1 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 165503 DI 10.1103/PhysRevLett.88.165503 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400021 PM 11955239 ER PT J AU Yusof, ZM Wells, BO Valla, T Fedorov, AV Johnson, PD Li, Q Kendziora, C Jian, S Hinks, DG AF Yusof, ZM Wells, BO Valla, T Fedorov, AV Johnson, PD Li, Q Kendziora, C Jian, S Hinks, DG TI Quasiparticle liquid in the highly overdoped Bi2Sr2CaCu2O8+delta SO PHYSICAL REVIEW LETTERS LA English DT Article ID SINGLE-CRYSTAL BI2SR2CACU2O8+DELTA; T-C SUPERCONDUCTORS; PHOTOEMISSION; STATE; TRANSPORT; SURFACE; GAP AB Results from the study of a highly overdoped (OD) Bi2Sr 2CaCu2O8+delta with a T-c=51 K using angle-resolved photoemission spectroscopy are presented. We observe a sharp peak in the spectra near (pi, 0) that persists well above T-c, a nodal self-energy which approaches that seen for the Mo(110) surface state, and a more k -independent line shape at the Fermi surface than the lower-doped cuprates. This allows for a realistic comparison of the lifetime values to the experimental resistivity measurements. These observations point to the validity of the quasiparticle picture for the OD even in the normal state. C1 Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA. USN, Res Lab, Washington, DC 20375 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Yusof, ZM (reprint author), Univ Connecticut, Dept Phys, 2152 Hillside Rd U-46, Storrs, CT 06269 USA. NR 26 TC 39 Z9 39 U1 3 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD APR 22 PY 2002 VL 88 IS 16 AR 167006 DI 10.1103/PhysRevLett.88.167006 PG 4 WC Physics, Multidisciplinary SC Physics GA 540AH UT WOS:000174905400035 PM 11955253 ER PT J AU Wu, C Steiner, WE Tornatore, PS Matz, LM Siems, WF Atkinson, DA Hill, HH AF Wu, C Steiner, WE Tornatore, PS Matz, LM Siems, WF Atkinson, DA Hill, HH TI Construction and characterization of a high-flow, high-resolution ion mobility spectrometer for detection of explosives after personnel portal sampling SO TALANTA LA English DT Article DE ion mobility spectrometry; high-flow; high-resolution; personnel portal ID GAS-CHROMATOGRAPHY AB A novel analysis of explosives via the coupling of an airline passenger personnel portal with a high-flow (HF), high-resolution (HR) ion mobility spectrometry (IMS) was shown for the first time. The HF-HR-IMS utilized a novel ion aperture grid design with a Ni-63 ionization source while operating at ambient pressure in the positive ion mode at 200 degreesC. The HF-HR-IMS response characteristics of 2,4,6-trinitrotoluene (TNT), 4,6-dinitro-o-cresol (4,6DNOC), and cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) were investigated. Modifications made to the HF-HR-IMS exhaust and ionization source created an 800% increase in the total ion current (TIC), from 0.85 to 6.8 nA. This translated into a 65% ion response increase for TNT when compared with a traditional IMS. A mixture of TNT and (4,6DNOC) was used to successfully demonstrate the resolving power of the species with similar reduced mobility constants (K-o), 1.54 and 1.59, respectively. The reactant ion (H2O)(n)H+, peak was also used to measure the resolving power of the spectrometer while varying the internal diameter of three different aperture openings from 1.00 to 3.54cm. This provided a resolving power range of 50-60, double that typically achievable by commercial IMS instruments. Most important, these changes made in this new instrumental design can be implemented to all existing and future IMS's to greatly enhance the achievable IMS resolving power. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Washington State Univ, Dept Chem, Pullman, WA 99164 USA. Ion Track Instruments, Wilmington, MA 01887 USA. Idaho Natl Engn & Environm Lab, Dept Chem, Idaho Falls, ID 83401 USA. RP Hill, HH (reprint author), Washington State Univ, Dept Chem, Pullman, WA 99164 USA. NR 20 TC 40 Z9 41 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-9140 J9 TALANTA JI Talanta PD APR 22 PY 2002 VL 57 IS 1 BP 123 EP 134 AR PII S0039-9140(01)00680-4 PG 12 WC Chemistry, Analytical SC Chemistry GA 552MJ UT WOS:000175623900015 PM 18968612 ER PT J AU Tuszewski, MG Cayton, TE Ingraham, JC AF Tuszewski, MG Cayton, TE Ingraham, JC TI A new numerical technique to design satellite energetic electron detectors SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE numerical technique; electron detector AB Energetic charged particles trapped in the magnetosphere are routinely detected by satellite instruments. However, it is generally difficult to extract quantitative energy and angular information from such measurements because the interaction of energetic electrons with matter is rather complex. Beam calibrations and Monte-Carlo (MC) simulations are often used to evaluate a flight instrument once it is built. However, rules of thumb and past experience are common tools to design the instrument in the first place. Hence, we have developed a simple numerical procedure, based on analytical probabilities, suitable for instrumental design and evaluation. In addition to the geometrical response, the contributions of surface backscattering, edge penetration, and bremsstrahlung radiation are estimated. The new results are benchmarked against MC calculations for a simple test case. Complicated effects, such as the contribution of the satellite to the instrumental response, can be estimated with the new formalism. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Grp NIS 2, MS D436, Los Alamos, NM 87545 USA. RP Tuszewski, MG (reprint author), Los Alamos Natl Lab, Grp NIS 2, MS D436, POB 1663, Los Alamos, NM 87545 USA. NR 15 TC 10 Z9 10 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 APR 21 PY 2002 VL 482 IS 3 BP 653 EP 666 AR PII S0168-9002(01)01735-1 DI 10.1016/S0168-9002(01)01735-1 PG 14 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 551FU UT WOS:000175549900010 ER PT J AU Orlov, Y Ozben, CS Semertzidis, YK AF Orlov, Y Ozben, CS Semertzidis, YK TI Muon revolution frequency distribution from a partial-time Fourier transform of the g-2 signal in the muon g-2 experiment SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE storage ring; momentum distribution; Fourier AB A new method of precise measurement of the revolution frequency distribution, F(f), in the muon storage ring, and hence muon momentum p, energy E, and equilibrium radius R distributions, has been developed and used in analyzing data in the muon g-2 experiment at Brookhaven National Laboratory. The method is partly based on the Fourier transform of the observed electron decay signal, which is known in this experiment only after some time t(s) after injection. It is shown that the standard Fourier transform would give a wrong frequency distribution even if the signal were known immediately after injection. Only the cosine Fourier transform with the property determined initial time t(0) (different for different detectors placed along the orbit) gives the correct frequency distribution in such a case. As for a later starting time, t(s) > t(0), a special procedure must be used to find t(0) and to compensate for the lack of information about the signal between t(0) and t(s). The new technique is highly accurate and radically different from that used by CERN in its muon g-2 experiment. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Cornell Univ, Newman Lab Nucl Studies, Ithaca, NY 14853 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Orlov, Y (reprint author), Cornell Univ, Newman Lab Nucl Studies, Ithaca, NY 14853 USA. RI Semertzidis, Yannis K./N-1002-2013 NR 4 TC 7 Z9 7 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 APR 21 PY 2002 VL 482 IS 3 BP 767 EP 775 AR PII S0168-9002(01)01703-X DI 10.1016/S0168-9002(01)01703-X PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 551FU UT WOS:000175549900021 ER PT J AU Ohsumi, H Gurriaran, R Hubert, P Arnold, R Augier, C Baker, J Barabash, A Bing, O Brudanin, V Caffrey, AJ Campagne, JE Caurier, E Dassie, D Egorov, V Errahmane, K Eschbach, R Filipova, T Guyonnet, JL Hubert, F Jollet, C Jullian, S Kisel, I Klimenko, A Kochetov, O Kornoukhov, VN Kovalenko, V Kuzichev, V Lalanne, D Laplanche, F Leccia, F Linck, I Longuemare, C Marquet, C Mauger, F Nicholson, HW Nikolic-Audit, I Piquemal, F Reyss, JL Sarazin, X Smolnikov, A Stekl, I Suhonen, J Sutton, CS Szklarz, G Timkin, V Tretyak, V Urnatov, V Vala, L Vanyushin, I Vareille, A Vasiliev, V Vasiliev, S Vorobel, V Vylov, T AF Ohsumi, H Gurriaran, R Hubert, P Arnold, R Augier, C Baker, J Barabash, A Bing, O Brudanin, V Caffrey, AJ Campagne, JE Caurier, E Dassie, D Egorov, V Errahmane, K Eschbach, R Filipova, T Guyonnet, JL Hubert, F Jollet, C Jullian, S Kisel, I Klimenko, A Kochetov, O Kornoukhov, VN Kovalenko, V Kuzichev, V Lalanne, D Laplanche, F Leccia, F Linck, I Longuemare, C Marquet, C Mauger, F Nicholson, HW Nikolic-Audit, I Piquemal, F Reyss, JL Sarazin, X Smolnikov, A Stekl, I Suhonen, J Sutton, CS Szklarz, G Timkin, V Tretyak, V Urnatov, V Vala, L Vanyushin, I Vareille, A Vasiliev, V Vasiliev, S Vorobel, V Vylov, T TI Gamma-ray flux in the Frejus underground laboratory measured with NaI detector SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE gamma-ray flux; NaI detector; underground laboratory; background; neutron capture gamma-ray; double beta decay ID DOUBLE-BETA-DECAY; NEUTRONS AB The gamma-ray flux in the Frejus underground laboratory has been studied using an NaI detector surrounded by different diagonostic shields. Below 4 MeV, the spectrum is dominated by radioactivities in the surrounding materials and rocks. Between 4 and 6 MeV, the shape of the spectrum is well explained by U, Th and daughters, which are internal contaminations in the NaI crystal. Between 6 and 10 MeV, the gamma-ray flux is strongly correlated with neutron captures in the surrounding materials. Finally, the gamma-ray flux above 10 MeV falls off and is related to the very weak cosmic muon flux via muon bremsstrahlung. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Saga Univ, Fac Culture & Educ, Saga 8408502, Japan. CENBG, INP23, CNRS, F-33175 Gradignan, France. Univ Bordeaux 1, F-33175 Gradignan, France. IReS, INP23, CNRS, F-67037 Strasbourg, France. Univ Strasbourg 1, F-67037 Strasbourg, France. LAL, INP23, CNRS, F-91405 Orsay, France. Univ Paris 11, F-91405 Orsay, France. INEEL, Idaho Falls, ID 83415 USA. ITEP, Moscow 117259, Russia. JINR, Dubna 141980, Russia. LPC, INP23, CNRS, F-14032 Caen, France. Univ Caen, F-14032 Caen, France. MHC, S Hadley, MA 01075 USA. LSCE, CNRS, F-91190 Gif Sur Yvette, France. Czech Tech Univ, FNSPE, Prague, Czech Republic. Univ Jyvaskyla, Jyvaskyla 40351, Finland. Charles Univ Prague, Prague, Czech Republic. RP Ohsumi, H (reprint author), Saga Univ, Fac Culture & Educ, Saga 8408502, Japan. EM ohsumi@phys.pd.saga-u.ac.jp; rodolfo.gurriaran@ipsn.fr RI Caffrey, Augustine/C-2005-2009; Vala, Ladislav/L-4938-2016; Barabash, Alexander/S-8851-2016 NR 13 TC 12 Z9 12 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 APR 21 PY 2002 VL 482 IS 3 BP 832 EP 839 AR PII S0168-9002(01)01866-6 DI 10.1016/S0168-9002(01)01866-6 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 551FU UT WOS:000175549900027 ER PT J AU Berdahl, P Akbari, H Rose, LS AF Berdahl, P Akbari, H Rose, LS TI Aging of reflective roofs: soot deposition SO APPLIED OPTICS LA English DT Article ID OPTICAL-PROPERTIES; LIGHT-SCATTERING; BLACK CARBON; AEROSOLS; ALBEDO; ABSORPTION AB Solar-reflective roofs remain cooler than absorptive roofs and thus conserve electricity otherwise needed for air conditioning. A currently controversial aspect of solar-reflective cool roofing is the extent to which an initially high solar reflectance decreases with time. We present experimental data on the spectral absorption of deposits that accumulate on roofs, and we attribute most of the absorption to carbon soot originally produced by combustion. The deposits absorb more at short wavelengths (e.g., in the blue) than in the red and infrared, imparting a slightly yellow tinge to formerly white surfaces. The initial rate of reflectance reduction by soot accumulation is consistent with known emission rates that are due to combustion. The long-term reflectance change appears to be determined by the ability of the soot to adhere to the roof, resisting washout by rain. (C) 2002 Optical Society of America. C1 Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Berdahl, P (reprint author), Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. EM phberdahl@lbl.gov NR 30 TC 15 Z9 15 U1 1 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD APR 20 PY 2002 VL 41 IS 12 BP 2355 EP 2360 DI 10.1364/AO.41.002355 PG 6 WC Optics SC Optics GA 544KH UT WOS:000175156400021 PM 12003230 ER PT J AU Salmonson, JD Galama, TJ AF Salmonson, JD Galama, TJ TI Discovery of a tight correlation between pulse lag/luminosity and jet-break times: A connection between gamma-ray bursts and afterglow properties SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts; gamma rays : theory ID 14 DECEMBER 1997; BATSE OBSERVATIONS; COLLAPSARS; SPECTRA AB A correlation is presented between the pulse lag and the jet-break time for seven BATSE gamma-ray bursts (GRBs) with known redshifts. This is, to the best of our knowledge, the first known direct tight correlation between a property of the gamma-ray burst phase (the pulse lag) and the afterglow phase (the jet-break time). As pulse lag and luminosity have been found to be correlated, this also represents a correlation between peak luminosity and jet-break time. Observed timescales (variability or spectral lags), as well as peak luminosity, naturally have a strong dependence on the Lorentz factor of the outflow, so we propose that much of the variety among GRBs has a purely kinematic origin (the speed or direction of the outflow). We explore a model in which the variation among GRBs is due to a variation in jet opening angles and find that the narrowest jets have the fastest outflows. We also explore models in which the jets have similar morphology and size, and the variation among bursts is caused by variations in viewing angles and/or due to velocity profiles. The relations between luminosity, variability, spectral lag, and jet-break time can be qualitatively understood from models in which the Lorentz factor decreases as a function of angle from the jet axis. One expects to see high luminosities, short pulse lags, and high variability as well as an early jet-break time for bursts viewed on-axis, while higher viewing inclinations will yield lower luminosities, longer pulse lags, smoother bursts, and later jet-break times. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA. RP Salmonson, JD (reprint author), Lawrence Livermore Natl Lab, L-095,POB 808, Livermore, CA 94551 USA. RI Galama, Titus/D-1429-2014 OI Galama, Titus/0000-0002-1036-396X NR 32 TC 46 Z9 47 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 20 PY 2002 VL 569 IS 2 BP 682 EP 688 DI 10.1086/339391 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 541ND UT WOS:000174989900014 ER PT J AU Iglesias, CA Rogers, FJ Saumon, D AF Iglesias, CA Rogers, FJ Saumon, D TI Density effects on the opacity of cool helium white dwarf atmospheres SO ASTROPHYSICAL JOURNAL LA English DT Article DE atomic processes; scattering; stars : atmospheres; white dwarfs ID MODEL AB Density effects on two important processes contributing to the opacity of a weakly ionized helium gas are considered. The correction to free-free absorption by the negative helium ion is treated in the Born approximation using analytical approximations for the electron-atom interaction. The correction to Rayleigh scattering uses well-known formulae obtained from density fluctuation theory. In both processes, the main density effect appears through the static structure factor, which accounts for spatial correlations between the helium atoms. These correlations significantly reduce the cross sections at the high densities encountered in cool, He white dwarf atmospheres. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. RP Iglesias, CA (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. NR 13 TC 24 Z9 24 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 20 PY 2002 VL 569 IS 2 BP L111 EP L114 DI 10.1086/340689 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 541NU UT WOS:000174991300013 ER PT J AU Poet, TS McDougal, JN AF Poet, TS McDougal, JN TI Skin absorption and human risk assessment SO CHEMICO-BIOLOGICAL INTERACTIONS LA English DT Review DE skin; penetration; absorption; risk assessment; models ID INVITRO PERCUTANEOUS-ABSORPTION; DERMAL EXPOSURE LIMITS; COMPARATIVE IN-VITRO; TIME BREATH ANALYSIS; ANIMAL-MODELS; RHESUS-MONKEY; RAT SKIN; OCCUPATIONAL ENVIRONMENTS; PORCINE SKIN; HAIRLESS RAT AB A common practice is to assume that percutaneous absorption does not significantly contribute to total bioavailability and therefore, absorption through other routes is more important to human risk assessment. The skin can represent a significant barrier to absorption, but some substances are absorbed to a significant extent. Since there is a potential for percutaneous penetration that is not consistent between species or substances, the assessment of the potential contribution of total body burden from dermal exposures should be considered. This review briefly discusses some theories, practices, and factors that affect percutaneous absorption with an emphasis on how percutaneous absorption evaluations apply to human risk assessment. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Wright State Univ, Sch Med, Dayton, OH 45435 USA. RP Poet, TS (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. NR 78 TC 45 Z9 47 U1 1 U2 5 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0009-2797 J9 CHEM-BIOL INTERACT JI Chem.-Biol. Interact. PD APR 20 PY 2002 VL 140 IS 1 BP 19 EP 34 AR PII S0009-2797(02)00013-3 DI 10.1016/S0009-2797(02)00013-3 PG 16 WC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology GA 566VB UT WOS:000176448000002 PM 12044558 ER PT J AU Gray, ML Champagne, KJ Soong, Y Killmeyer, RP Maroto-Valer, MM Andresen, JM Ciocco, MV Zandhuis, PH AF Gray, ML Champagne, KJ Soong, Y Killmeyer, RP Maroto-Valer, MM Andresen, JM Ciocco, MV Zandhuis, PH TI Physical cleaning of high carbon fly ash SO FUEL PROCESSING TECHNOLOGY LA English DT Article DE fly ash; agglomeration; unburned carbon; combustion by-products AB An industrial fly ash sample was cleaned by three different processes, which were tribo-electrostatic separation, ultrasonic column agglomeration, and column flotation. The unburned carbon concentrates were collected at purities ranging up to 62% at recoveries of 62%. In addition, optical microscopy studies were conducted on the final carbon concentrates to determine the carbon forms (inertinite, isotropic coke and anisotropic coke) collected from these various physical-cleaning processes. The effects of the various cleaning processes on the production of different carbon forms from high carbon fly ashes will be discussed. (C) 2002 Elsevier Science B.V. All rights reserved. C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. Penn State Univ, Energy Inst, University Pk, PA 16802 USA. Parson Project Serv Inc, Natl Energy Technol Lab, Library, PA 15129 USA. RP Gray, ML (reprint author), US DOE, Natl Energy Technol Lab, POB 10940,Cochran Mills Rd, Pittsburgh, PA 15236 USA. RI Maroto-Valer, Mercedes/F-5016-2014 OI Maroto-Valer, Mercedes/0000-0003-1643-2863 NR 14 TC 25 Z9 26 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD APR 20 PY 2002 VL 76 IS 1 BP 11 EP 21 AR PII S0378-3820(02)00006-1 DI 10.1016/S0378-3820(02)00006-1 PG 11 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA 562HR UT WOS:000176191800002 ER PT J AU Zhang, SS Jow, TR Amine, K Henriksen, GL AF Zhang, SS Jow, TR Amine, K Henriksen, GL TI LiPF6-EC-EMC electrolyte for Li-ion battery SO JOURNAL OF POWER SOURCES LA English DT Article DE Li-ion battery; electrolyte; SEI film; spinel LiMn2O4; graphite ID CARBONATES; GRAPHITE; INTERCALATION; TEMPERATURE; OXIDES; CELLS AB We studied the effect of salt concentration and solvent ratio on the cycling performance of LiMnO4 cathode and graphite anode in LiPF6-ethylene carbonate (EC)-ethyl methyl carbonate (EMC) electrolytes. The results show that solvent ratio has negligible impact on the performance of both electrodes but does affect the issues of thermal compatibility and ionic conductivity. Salt concentration affects the performance in two reverse ways: LiMnO4 cathode requires low concentration, while graphite anode requires high concentration. It is observed that, during the first cycle, both electrodes produce irreversible capacity and form a solid electrolyte interface (SEI) film on their surface. From the view point of operation at low temperatures, 1 M UPF6 3:7 EC-EMC is recommended for Li-ion cells. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USA, Res Lab, Adelphi, MD 20783 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Zhang, SS (reprint author), USA, Res Lab, Adelphi, MD 20783 USA. RI Zhang, Sheng/A-4456-2012; Amine, Khalil/K-9344-2013 OI Zhang, Sheng/0000-0003-4435-4110; NR 16 TC 44 Z9 54 U1 3 U2 45 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD APR 20 PY 2002 VL 107 IS 1 BP 18 EP 23 AR PII S0378-7753(01)00968-5 DI 10.1016/S0378-7753(01)00968-5 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 547FB UT WOS:000175321400004 ER PT J AU Dulub, O Boatner, LA Diebold, U AF Dulub, O Boatner, LA Diebold, U TI STM study of Cu growth on the ZnO(1010) surface SO SURFACE SCIENCE LA English DT Article DE scanning tunneling microscope; growth; adsorption kinetics; nucleation; zinc oxide; copper; surface defects; diffusion and migration ID TERMINATED ZNO(0001) SURFACE; SINGLE-CRYSTAL SURFACES; METAL-OXIDE SURFACES; METHANOL SYNTHESIS; AB-INITIO; NON-POLAR; PHOTOELECTRON-SPECTROSCOPY; HYDROGEN ADSORPTION; ACTIVE-SITES; ZNO 1010 AB The room temperature growth of Cu islands on the non-polar (10 10) surface of zinc oxide was studied using scanning tunneling microscopy, Images of the clean (10 10) surface prepared by sputtering and annealing at 550-700 degreesC exhibit flat terraces with a high density of steps, mostly running along [0 0 0 1] and [1 (2) over bar 1 0] directions, For Cu coverages of 0.025-1 ML deposited on flat. freshly annealed surfaces, preferential nucleation occurs at the step edges oriented perpendicular to the [1 2 10] atomic row direction. Exclusively three-dimensional (3D) islands have been observed at all coverages. For comparison. the same Cu coverages were deposited onto the surface contaminated by adsorption from the residual gas in the ultrahigh vacuum chamber. Both 2D and 3D islands, randomly distributed across the terraces, were observed reproducibly on such slightly contaminated surfaces. The density of the islands, as well as their average diameter and height, increases with increasing Cu coverage for both surface preparations, (C) 2002 Elsevier Science B.V. All rights reserved. C1 Tulane Univ, Dept Phys, New Orleans, LA 70118 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Diebold, U (reprint author), Tulane Univ, Dept Phys, New Orleans, LA 70118 USA. RI Diebold, Ulrike/A-3681-2010; Boatner, Lynn/I-6428-2013 OI Diebold, Ulrike/0000-0003-0319-5256; Boatner, Lynn/0000-0002-0235-7594 NR 45 TC 63 Z9 64 U1 2 U2 37 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD APR 20 PY 2002 VL 504 IS 1-3 BP 271 EP 281 AR PII S0039-6028(02)01107-X DI 10.1016/S0039-6028(02)01107-X PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 551JQ UT WOS:000175557700032 ER PT J AU Ismail Chandravakar, S Zehner, DM AF Ismail Chandravakar, S Zehner, DM TI Multilayer relaxation of the Cu(210) surface SO SURFACE SCIENCE LA English DT Article DE copper; low energy electron diffraction (LEED); surface relaxation and reconstruction ID METAL-SURFACES; LATTICE-RELAXATION; TENSOR LEED AB Low-energy electron diffraction (LEED) 1-V has been utilized to determine the surface structure of Cu(2 1 0). The surface structure is found to exhibit multilayer relaxation following the trend - - + (- is contraction and + is expansion in the interlayer spacing). The magnitude of interplanar relaxation is found to be damped, where \Deltad(12)\ > \Deltad(23)\ > \Deltad(34)\. etc. This kind of behavior is quite different from that observed on Al(2 1 0) [Phys. Rev. B 38 (1988) 7913]. where the magnitude of interplanar relaxation in the third interlayer is larger than that in the second interlayer (i.e.. \Deltad(23)\ < \Deltad(34)\). The difference of damped multilayer relaxation behavior of Cu(2 1 0) and Al(2 1 0) could be related to a charge density oscillation perpendicular to the surface. (C) 2002 Elsevier Science B,V, All rights reserved. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Ismail (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. NR 22 TC 7 Z9 7 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD APR 20 PY 2002 VL 504 IS 1-3 BP L201 EP L207 AR PII S0039-6028(02)01100-7 PG 7 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 551JQ UT WOS:000175557700003 ER PT J AU Wang, YD Peng, RL Wang, XL McGreevy, RL AF Wang, YD Peng, RL Wang, XL McGreevy, RL TI Grain-orientation-dependent residual stress and the effect of annealing in cold-rolled stainless steel SO ACTA MATERIALIA LA English DT Article DE stress; neutron scattering; stainless steels; texture; phase transformations ID INTERGRANULAR STRAINS; PLASTIC-DEFORMATION; POLYCRYSTALS; EVOLUTION; DIFFRACTION; SIMULATIONS; GENERATION AB Cold rolling leads to a residual stress that is dependent not only on the specimen directions but also on the orientation of the grain. Neutron diffraction was used to investigate residual stresses and the effect of annealing in cold-rolled stainless steel. a two-phase material consisting of 62 vol% austenite and the rest deformation-induced martensite. The specimens were prepared by cold rolling of AISI 301 stainless steel with 48% reduction. The grain-orientation-dependent residual stress, or inter-granular stress, was determined by constructing the stress orientation distribution function, a recently developed concept, from the residual strains measured along various crystallographic directions. For the cold-rolled sample, a strong grain orientation anisotropy was observed for residual stresses in both phases. Detailed analysis of the experimental stress and texture data indicates that the observed orientation anisotropy was caused by the selective phase transformation that occurred during cold rolling. Annealing at 500degreesC leads to recovery, which significantly reduces the orientation anisotropy of the residual stress. The experimental data show that the recovery dynamics in the austenite and martensite phases are quite different. It appears that the overall recovery behavior in this two-phase material is driven by the martensite phase. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Spallat Neutron Source Project, Oak Ridge, TN 37831 USA. Uppsala Univ, NFL, Studsvik Neutron Res Lab, S-61182 Nykoping, Sweden. Linkoping Univ, Dept Mech Engn, S-58183 Linkoping, Sweden. RP Wang, YD (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source Project, Oak Ridge, TN 37831 USA. RI Wang, Xun-Li/C-9636-2010; wang, yandong/G-9404-2013 OI Wang, Xun-Li/0000-0003-4060-8777; NR 37 TC 48 Z9 49 U1 3 U2 23 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD APR 19 PY 2002 VL 50 IS 7 BP 1717 EP 1734 AR PII S1359-6454(02)00021-6 DI 10.1016/S1359-6454(02)00021-6 PG 18 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 547HU UT WOS:000175327600007 ER PT J AU Asoka-Kumar, P Hartley, JH Howell, RH Sterne, PA Akers, D Shah, V Denison, A AF Asoka-Kumar, P Hartley, JH Howell, RH Sterne, PA Akers, D Shah, V Denison, A TI Direct observation of carbon-decorated defects in fatigued type 304 stainless steel using positron annihilation spectroscopy SO ACTA MATERIALIA LA English DT Article DE fatigue; steel; defects; positron annihilation ID AUSTENITIC STAINLESS-STEEL; TWIN BOUNDARIES; M23C6 CARBIDE; PRECIPITATION; RESISTIVITY; LIFETIME; GROWTH; METALS; IRON AB We have directly observed carbon decoration of defects in fatigued 304 stainless steel using positron annihilation spectroscopy. The formation and evolution of defects during fatigue was determined by positron annihilation lifetimes and electron momentum distributions in a series of samples. We find an initial rapid change in the defect concentrations that saturates around 10% of the cycles to failure into two distinct open-volume defect populations that both trap the positrons. Analysis of the momentum distributions of atomically bound electrons demonstrates that one of the defects has high levels of carbon decoration. Electron momentum distributions also show evolution in the carbon decoration of the defects with increasing fatigue all the way to failure. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, Dept Phys, Livermore, CA 94550 USA. Bechtel BWXT Idaho LLC, Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Asoka-Kumar, P (reprint author), Lawrence Livermore Natl Lab, Dept Phys, Livermore, CA 94550 USA. EM asoka@llnl.gov NR 22 TC 19 Z9 19 U1 0 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD APR 19 PY 2002 VL 50 IS 7 BP 1761 EP 1770 AR PII S1359-6454(02)00027-7 DI 10.1016/S1359-6454(02)00027-7 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 547HU UT WOS:000175327600011 ER PT J AU Wu, XY Babnigg, G Zagranichnaya, T Villereal, ML AF Wu, XY Babnigg, G Zagranichnaya, T Villereal, ML TI The role of endogenous human Trp4 in regulating carbachol-induced calcium oscillations in HEK-293 cells SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID CAPACITATIVE CA2+ ENTRY; STORE-OPERATED CHANNEL; (I) OSCILLATIONS; FUNCTIONAL EXPRESSION; CATION CHANNELS; INTRACELLULAR CA2+; DROSOPHILA TRP; HUMAN HOMOLOG; RECEPTOR; DEPLETION AB We utilized 2-aminoethyoxydiphenyl borane, an agent that blocks store-operated Ca2+ entry, as well as an antisense approach to characterize endogenous Ca2+ entry pathways in HEK-293 cells. The thapsigargin- and carbachol-induced, but not the 1-oleolyl-2-acytyl-sn-glycerol (OAG).induced, entry was blocked by 2-aminoethyoxydiphenyl borane. Both reverse transcriptase-PCR and Western blot analyses demonstrated endogenous expression for HTRP1, HTRP3, and HTRP4 and specific suppression of mRNA levels and Trp protein levels in cells stably expressing antisense constructs. Expression of HTRP4 antisense inhibited 35% of the carbachol (CCh)-stimulated Ba2+ entry and 46% of the OAG-stimulated Sr2+ entry but in contrast had no effect on the thapsigargin-stimulated Ba2+ or Sr2+ entry. HTRP3 antisense reduced, while HTRP1 antisense had no effect on, OAG-induced Sr2+ entry. Of greater importance, HTRP4 antisense expression, but not HTRP3 antisense expression, blocked the sustained Ca2+ oscillations produced by low doses of CCh (15 muM), arguing that receptor-stimulated rather than store-operated channels are involved in these sustained oscillations. HTRP4 antisense also inhibited 75% of the arachidonic acid-induced Ca2+ entry. In summary, these data suggest that HTRP4 proteins in HEK-293 cells, differing from HTRP3 and HTRP1 proteins, do not serve as functional subunits of store-operated channels but do function as subunits for CCh- and OAG-stimulated channels. Furthermore, evidence is provided for the first time for the involvement of a Trp isoform (HTRP4) in the formation of the channel responsible for both arachidonic acid-induced Ca2+ entry and the Ca2+ entry needed to sustain long term Ca2+ oscillations induced by low doses of carbachol. C1 Univ Chicago, Dept Neurobiol Pharmacol & Physiol, Chicago, IL 60637 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Villereal, ML (reprint author), Univ Chicago, Dept Neurobiol Pharmacol & Physiol, Abbott 532,947 E 58th St, Chicago, IL 60637 USA. FU NIGMS NIH HHS [GM-54500] NR 56 TC 76 Z9 81 U1 0 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD APR 19 PY 2002 VL 277 IS 16 BP 13597 EP 13608 DI 10.1074/jbc.M110881200 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 543HR UT WOS:000175096000035 PM 11830588 ER PT J AU Harvey, SD Nelson, DA Wright, BW Grate, JW AF Harvey, SD Nelson, DA Wright, BW Grate, JW TI Selective stationary phase for solid-phase microextraction analysis of sarin (GB) SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE solid-phase microextraction; air analysis; warfare agents; sarin; organophosphorus compounds ID BOND ACIDIC POLYMERS; ACOUSTIC-WAVE; SENSORS; AIR AB A number of critical field applications require monitoring air samples for trace levels of chemical warfare agents. Solid-phase microextraction (SPME) is a convenient format to conduct these analyses. Measurements could be significantly improved if a SPME phase selective for nerve agents were substituted for non-selective polymers typically used (e.g., polydimethylsiloxane). This paper evaluates a novel stationary phase, previously developed for methylphosphonate sensor applications, for use with SPME sampling. The phenol-based polymer, BSP3, was found to offer far higher selectivity toward sarin (GB) than polydimethylsiloxane due to a pronounced affinity toward the target analyte and a lower affinity toward hydrocarbons. (C) 2002 Elsevier Science B V All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Harvey, SD (reprint author), Pacific NW Natl Lab, POB 99-MSIN P7-07, Richland, WA 99352 USA. NR 13 TC 20 Z9 21 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD APR 19 PY 2002 VL 954 IS 1-2 BP 217 EP 225 AR PII S0021-9673(02)00188-7 DI 10.1016/S0021-9673(02)00188-7 PG 9 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 548QW UT WOS:000175401400020 PM 12058906 ER PT J AU Derewenda, U Li, J Derewenda, Z Dauter, Z Mueller, GA Rule, GS Benjamin, DC AF Derewenda, U Li, J Derewenda, Z Dauter, Z Mueller, GA Rule, GS Benjamin, DC TI The crystal structure of a major dust mite allergen Der p 2, and its biological implications SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE allergen; asthma; X-ray structure; immunoglobulin fold; hydrophobic cavity ID MACROMOLECULAR STRUCTURES; IMMUNOGLOBULIN FOLD; PROTEIN; DER-P-2; FAMILY; RHOGDI; BINDS; DERMATOPHAGOIDES; REFINEMENT; ASTHMA AB The crystal structure of the common house mite (Dermatophagoides sp.) Der p 2 allergen was solved at 2.15 Angstrom resolution using the MAD phasing technique, and refined to an R-factor of 0.209. The refined atomic model, which reveals an immunoglobulin-like tertiary fold, differs in important ways from the previously described NMR structure, because the two beta-sheets are significantly further apart and create an internal cavity, which is occupied by a hydrophobic ligand. This interaction is structurally reminiscent of the binding of a prenyl group by a regulatory protein, the Rho guanine nucleotide exchange inhibitor. The crystal structure suggests that binding of non-polar molecules may be essential to the physiological function of the Der p 2 protein, (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Univ Virginia, Dept Mol Physiol & Biol Phys, Charlottesville, VA 22908 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Beirne Carter Ctr Immunol Res, Charlottesville, VA 22908 USA. Univ Virginia, Asthma & Allerg Dis Ctr, Charlottesville, VA 22908 USA. Carnegie Mellon Univ, Dept Biol Sci, Pittsburgh, PA 15213 USA. RP Derewenda, U (reprint author), Univ Virginia, Dept Mol Physiol & Biol Phys, Charlottesville, VA 22908 USA. RI Rule, Gordon/Q-2422-2015 OI Rule, Gordon/0000-0002-4396-3363 FU NIAID NIH HHS [AI-34607] NR 32 TC 88 Z9 93 U1 0 U2 3 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD APR 19 PY 2002 VL 318 IS 1 BP 189 EP 197 DI 10.0000/S0022-2836(02)00027-X PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 548MY UT WOS:000175392800016 PM 12054778 ER PT J AU Donnelly, SE Birtcher, RC Allen, CW Morrison, I Furuya, K Song, MH Mitsuishi, K Dahmen, U AF Donnelly, SE Birtcher, RC Allen, CW Morrison, I Furuya, K Song, MH Mitsuishi, K Dahmen, U TI Ordering in a fluid inert gas confined by flat surfaces SO SCIENCE LA English DT Article ID LIQUID INTERFACE; HARD-SPHERES; SIMULATION; TEMPERATURE; TRANSITION; ALUMINUM; WALL AB High-resolution transmission electron microscopy images of room-temperature fluid xenon in small faceted cavities in aluminum reveal the presence of three well-defined layers within the fluid at each facet. Such interfacial layering of simple liquids has been theoretically predicted, but observational evidence has been ambiguous. Molecular dynamics simulations indicate that the density variation induced by the layering will cause xenon, confined to an approximately cubic cavity of volume approximate to 8 cubic nanometers, to condense into the body-centered cubic phase, differing from the face-centered cubic phase of both bulk solid xenon and solid xenon confined in somewhat larger (greater than or equal to 20 cubic nanometer) tetradecahedral cavities in face-centered cubic metals. Layering at the liquid-solid interface plays an important role in determining physical properties as diverse as the rheological behavior of two-dimensionally confined liquids and the dynamics of crystal growth. C1 Univ Salford, Inst Mat Res, Joule Phys Lab, Salford M5 4WT, Lancs, England. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Natl Inst Mat Sci, Tsukuba, Ibaraki 305, Japan. LBNL, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. RP Donnelly, SE (reprint author), Univ Salford, Inst Mat Res, Joule Phys Lab, Salford M5 4WT, Lancs, England. OI Donnelly, Stephen/0000-0002-9749-5550 NR 23 TC 90 Z9 90 U1 2 U2 23 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD APR 19 PY 2002 VL 296 IS 5567 BP 507 EP 510 DI 10.1126/science.1068521 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 544UE UT WOS:000175179400039 PM 11910071 ER PT J AU Haschke, JM Allen, TH AF Haschke, JM Allen, TH TI Equilibrium and thermodynamic properties of the PuO2+x solid solution SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE higher oxide of plutonium; Pu-O phase diagram; PuO2-water reaction; thermodynamic properties ID WATER; OXIDE AB Free energies for forming a fluorite-related NO, solid solution via the oxide-water reaction at 300-800 K are obtained using estimated partial molar free energy isotherms based on bounding conditions and property data. Derived AGO values indicate that the PuO2 + H2O reaction spontaneously forms oxide compositions up to PuO25. at 300 K and are consistent with diffraction data for fluorite-related solids formed by PuO2 and amorphous Pu(OH)(4) in aqueous solutions. Free energies of formation for PuO2+x at 300 K vary systematically from -246.8+/-2.0 kcal mol(-1) for x=0.1 to -273.9+/-6.0 kcal mol(-1) for x=0.5 and become increasingly positive at elevated temperatures. Estimated equilibrium O-2 pressures for the Pu+O-2 reaction suggest that 2+x at the upper phase boundary in air falls below 21.5 at 600-700 K and approaches 2.0 above 850 K. Results indicate that H-2 pressures generated by the oxide-water reaction in storage containers are not limited by equilibrium and suggest that low firing of oxygenated precipitates forms PuO2+x, a product with enhanced solubility and potential for generating high O-2 pressures upon heating. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Actinide Sci Consulting, Waco, TX 76712 USA. Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545 USA. RP Haschke, JM (reprint author), Actinide Sci Consulting, 11003 Willow Bend Dr, Waco, TX 76712 USA. NR 23 TC 23 Z9 23 U1 1 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD APR 18 PY 2002 VL 336 IS 1-2 BP 124 EP 131 AR PII S0925-8388(01)01908-0 DI 10.1016/S0925-8388(01)01908-9 PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 537ME UT WOS:000174761400019 ER PT J AU Leininger, ML Nielsen, IMB Colvin, ME Janssen, CL AF Leininger, ML Nielsen, IMB Colvin, ME Janssen, CL TI Accurate structures and binding energies for stacked uracil dimers SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID BASIS-SET CONVERGENCE; AB-INITIO; HARTREE-FOCK; MOLECULAR CALCULATIONS; AROMATIC STACKING; INFRARED-SPECTRA; HYDROGEN; PAIRS; IMPLEMENTATION; THYMINE AB The face-to-face and face-to-back stacked uracil dimers have been investigated by second-order Moller-Plesset (MP2) perturbation theory and by the coupled-cluster singles and doubles method augmented with a perturbative contribution from connected triple substitutions [CCSD(T)]. Full MP2 geometry optimizations were per-formed with a TZ2P(f,d)++ basis and with the 6-31G* basis for which harmonic vibrational frequencies were computed as well. Complete basis set MP2 binding energies were obtained from basis set extrapolations using the correlation-consistent basis sets cc-pVXZ (X = D-5) and aug-cc-pVXZ (X = D-Q). Higher-order correlation effects were gauged by computing the MP2 --> CCSD(T) shift in the counterpoise-corrected binding energy using a modified 6-31G* basis set. By adding this correction to the infinite basis set limit MP2 binding energies, final estimates of 9.7 and 8.8 kcal mol(-1) are obtained for the binding energies of the face-to-face and face-to-back structures, respectively. C1 Sandia Natl Labs, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Computat Biol Grp, Livermore, CA 94550 USA. RP Nielsen, IMB (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA. NR 30 TC 72 Z9 73 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD APR 18 PY 2002 VL 106 IS 15 BP 3850 EP 3854 DI 10.1021/jp013866f PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 544MP UT WOS:000175164400030 ER PT J AU Jacobs, K Wickham, J Alivisatos, AP AF Jacobs, K Wickham, J Alivisatos, AP TI Threshold size for ambient metastability of rocksalt CdSe nanocrystals SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Letter ID SEMICONDUCTOR NANOCRYSTALS; STRUCTURAL TRANSFORMATION; HIGH-PRESSURE; SILICON; PHASE AB We show that metastable rocksalt CdSe nanocrystals can persist at ambient pressure depending on the physical size of the particle. The size-dependence of the hysteresis loop was measured for the solid-solid transition in CdSc nanocrystals, between four- and six-coordinate structures. A systematic shift of the entire hysteresis loop to lower pressure results in a threshold size of similar to11 nm for ambient metastability of the six-coordinate rocksalt structure. Smaller nanocrystals transform back to the four-coordinate structure as occurs in the CdSe bulk solid. Surface energy contributions are used to explain the shift. The results have important implications for the optimum synthesis of metastable nanocrystal solids under ambient conditions. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM alivis@uclink4.berkeley.edu RI Alivisatos , Paul /N-8863-2015 OI Alivisatos , Paul /0000-0001-6895-9048 NR 24 TC 53 Z9 53 U1 0 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD APR 18 PY 2002 VL 106 IS 15 BP 3759 EP 3762 DI 10.1021/jp015563r PG 4 WC Chemistry, Physical SC Chemistry GA 544MR UT WOS:000175164600001 ER PT J AU Tucker, MC Reimer, JA Cairns, EJ Choi, S Manthiram, A AF Tucker, MC Reimer, JA Cairns, EJ Choi, S Manthiram, A TI Li-7 NMR studies of chemically-delithiated Li1-xCoO2 SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID ELECTRONIC-PROPERTIES; LICOO2; 400-DEGREES-C; DIFFRACTION; DEFECTS AB Li-7 magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy and Rietveld analysis of X-ray diffraction data have been used to study chemically delithiated Lil-xCoO2. Samples of LiCoO2 were prepared at 400 (LT), 600 (MT), and 800 degreesC (HT), chemically delithitated to Li0.5CoO2 composition, and heated at 200 degreesC. It was found that all HT materials and the as-prepared MT-Li0.5CoO2 displayed layered structure, whereas all LT materials and the 200 degreesC heated MT- Li0.5CoO2 displayed spinel structure. The NMR results suggest that the local atomic and electronic structures of the as-prepared MT-Li0.5CoO2 approach that of spinel phase although X-ray refinement results show the rhombohedral layer structure. The Li-7 MAS NMR results provide evidence for electronic phase segregation in layered and spinel Lil-xCoO2 materials. Several samples showed coexisting NMR peaks arising from lithium in a diamagnetic Co" environment and in a paramagnetic mixed-valence Co3+/4+ environment. Li0.5CoO2 samples derived from LiCoO2 fired at 600 degreesC and 800 degreesC gave rise to only one NMR peak, associated with a mixed-valence cobalt environment, and produced a low NMR signal intensity, arising from an environment containing localized t(2g), holes (Co" ions). A large NMR shift was observed for lithium in the mixed-valence environment, attributed to a Knight shift for the as-prepared HT-Li0.5CoO2 and to a hyperfine shift in the other samples, Variable-field studies showed homonuclear dipolar coupling to be the dominant source of residual line broadening in Lil-xCoO2, and chemical shift dispersion to be a probable secondary source. C1 Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM reimer@socrates.berkeley.edu RI Cairns, Elton/E-8873-2012 OI Cairns, Elton/0000-0002-1179-7591 NR 21 TC 9 Z9 9 U1 0 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD APR 18 PY 2002 VL 106 IS 15 BP 3842 EP 3847 DI 10.1021/jp0133541 PG 6 WC Chemistry, Physical SC Chemistry GA 544MR UT WOS:000175164600012 ER PT J AU Tamura, K Ocko, BM Wang, JX Adzic, RR AF Tamura, K Ocko, BM Wang, JX Adzic, RR TI Structure of active adlayers on bimetallic surfaces: Oxygen reduction on Au(111) with Bi adlayers SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID X-RAY-DIFFRACTION; TRANSMISSION GEOMETRY; ACID-SOLUTIONS; ELECTRODES; MONOLAYERS; SCATTERING; BISMUTH; CELL AB The structure of Bi adlayers on the Au( I 11) electrode surface during the course Of 02 reduction has been investigated by in situ surface X-ray scattering. Under oxygen reduction conditions, both the low-coverage (2 x 2)-Bi and the close-packed (p x root,3)-2Bi adlayer structures are stable. We developed an electrochemical drop cell that provides a more uniform potential distribution during high current conditions compared with commonly used thin-layer cells. Our results clearly indicate distinctly different catalytic properties for the two ordered bismuth adlayer phases. In the potential region corresponding to the (2 x 2)-Bi phase, 02 reduction is promoted to a four-electron reaction, albeit with relatively slow kinetics. The close-packed (p x root3)-2Bi phase, formed at more negative potentials, appears to have a limited number of sites available for four-electron reduction, but the reaction kinetics on this adlayer is enhanced by an increased overpotential. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. RP Tamura, K (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RI Wang, Jia/B-6346-2011 NR 14 TC 40 Z9 40 U1 1 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD APR 18 PY 2002 VL 106 IS 15 BP 3896 EP 3901 DI 10.1021/jp012960t PG 6 WC Chemistry, Physical SC Chemistry GA 544MR UT WOS:000175164600020 ER PT J AU Morales, A Aalseth, CE Avignone, FT Brodzinski, RL Cebrian, S Garcia, E Irastorza, IG Kirpichnikov IV Klimenko, AA Miley, HS Morales, J de Solorzano, AO Osetrov, SB Pogosov, VS Puimedon, J Reeves, JH Sarsa, ML Smolnikov, AA Tamanyan, AG Vasenko, AA Vasiliev, SI Villar, JA AF Morales, A Aalseth, CE Avignone, FT Brodzinski, RL Cebrian, S Garcia, E Irastorza, IG Kirpichnikov, IV Klimenko, AA Miley, HS Morales, J de Solorzano, AO Osetrov, SB Pogosov, VS Puimedon, J Reeves, JH Sarsa, ML Smolnikov, AA Tamanyan, AG Vasenko, AA Vasiliev, SI Villar, JA TI Improved constraints on wimps from the international germanium experiment IGEX SO PHYSICS LETTERS B LA English DT Article ID ANNUAL MODULATION SIGNATURE; DARK-MATTER SEARCH; DOUBLE-BETA DECAY; LIMITS; PARTICLES; GE-76 AB One IGEX (76)Ge double-beta decay detector is currently operating in the Canfrane Underground Laboratory in a search for dark matter WIMPs, through the Ge nuclear recoil produced by the WIMP elastic scattering. A new exclusion plot, sigma (m), has been derived for WIMP-nucleon spin-independent interactions. To obtain this result, 40 days of data from the IGEX detector (energy threshold E(thr) similar to 4 keV), recently collected, have been analyzed. These data improve the exclusion limits derived from all the other ionization germanium detectors in the mass region from 20 to 200 GeV. where a WIMP supposedly responsible for the annual modulation effect reported by the DAMA experiment would be located. The new IGEX exclusion contour enters, by the first time, the DAMA region by using only raw data, with no background discrimination, and excludes its upper left part. It is also shown that with a moderate improvement of the detector performances, the DANA region could be fully explored. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Zaragoza, Lab Nucl & High Energy Phys, E-50009 Zaragoza, Spain. Univ S Carolina, Columbia, SC 29208 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Inst Nucl Res, Baksan Neutrino Observ, Neutrino 361609, Russia. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Morales, A (reprint author), Univ Zaragoza, Lab Nucl & High Energy Phys, E-50009 Zaragoza, Spain. EM amorales@posta.unizar.es RI Irastorza, Igor/B-2085-2012; Sarsa Sarsa, Maria Luisa/K-6108-2014; Villar, Jose Angel/K-6630-2014; OI Irastorza, Igor/0000-0003-1163-1687; Sarsa Sarsa, Maria Luisa/0000-0002-7552-1228; Villar, Jose Angel/0000-0003-0228-7589; Garcia Abancens, Eduardo/0000-0002-9827-2332 NR 15 TC 64 Z9 64 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD APR 18 PY 2002 VL 532 IS 1-2 BP 8 EP 14 AR PII S0370-2693(02)01545-9 DI 10.1016/S0370-2693(02)01545-9 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 547VE UT WOS:000175352400002 ER PT J AU Gockeler, M Horsley, R Pleiter, D Rakow, PEL Schierholz, G Maynard, CM Richards, DG AF Gockeler, M Horsley, R Pleiter, D Rakow, PEL Schierholz, G Maynard, CM Richards, DG TI Negative-parity baryon masses using an O(alpha)-improved fermion action SO PHYSICS LETTERS B LA English DT Article ID N-C QCD; LATTICE QCD; O(A) IMPROVEMENT; WILSON FERMIONS; DECAY CONSTANTS; SPECTRUM; HADRONS; LIMIT AB We resent a calculation of the mass of the lowest-lying negative-parity J = 1/2(-) state in quenched QCD. Results are obtained using a non-perturbatively O(a)-improved clover fermion action, and a splitting is found between the mass of the nucleon, and its parity partner. The calculation is performed on two lattice volumes and at three lattice spacings, enabling a study of both finite-volume and finite lattice-spacing uncertainties. A comparison is made with results obtained using the unimproved Wilson fermion action. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. DESY, John von Neumann Inst Comp, NIC, D-15735 Zeuthen, Germany. Humboldt Univ, Inst Phys, D-10115 Berlin, Germany. DESY, D-22603 Hamburg, Germany. Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. Jefferson Lab, Newport News, VA 23606 USA. Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. RP Richards, DG (reprint author), Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. NR 24 TC 54 Z9 54 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD APR 18 PY 2002 VL 532 IS 1-2 BP 63 EP 70 AR PII S0370-2693(02)01492-2 DI 10.1016/S0370-2693(02)01492-2 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 547VE UT WOS:000175352400009 ER PT J AU Hall, LJ Nomura, Y AF Hall, LJ Nomura, Y TI Unification of weak and hypercharge interactions at the TeV scale SO PHYSICS LETTERS B LA English DT Article ID EXTRA DIMENSIONS; SUPERSYMMETRY; MILLIMETER; HIERARCHY; BREAKING; MASS AB A realistic SU(3)(C) x SU(3)(W) unified theory is constructed with a TeV sized extra dimension compactified on the orbifold S-1/Z(2), leaving only the standard model gauge group SU(3)(C) x SU(2)(L) x U(1)(Y) unbroken in the low energy 4D theory. The Higgs doublets are zero modes of bulk SU(3) W triplets and serve to normalize the hypercharge generator, apparently giving a tree-level prediction for the weak mixing angle: sin(2)theta = 1/4. The orbifold boundary conditions imply a restricted set of SU(3)(W) gauge transformations: at an orbifold fixed point only the transformations of SU(2)(L) x U(1)(Y) are operative. This allows quarks to be located at this fixed point, overcoming the longstanding problem of how to incorporate matter in a unified SU(3), theory. However, in general this local, explicit breaking of SU(3)(W) symmetry, necessary for including quarks into the theory, destroys the tree-level prediction for the weak mixing angle. This apparent contradiction is reconciled by making the volume of the extra dimension large, diluting the effects of the local SU(3) 1, violation. In the case that the electroweak theory is strongly coupled at the cutoff scale of the effective theory, radiative corrections to the weak mixing angle can be reliably computed, and used to predict the scale of compactification: 1-2 TeV without supersymmetry, and in the region of 3-6 TeV for a supersymmetric theory. The experimental signature of electroweak unification into SU(3)(W) is a set of "weak partners" of mass 1/2R, which are all electrically charged and are expected to be accessible at LHC. These include weak doublets of gauge particles of electric charge (++, +), and a charged scalar. When pair produced, they yield events containing multiple charged leptons, missing large transverse energy and possibly Higgs and electroweak gauge bosons. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Nomura, Y (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. OI Nomura, Yasunori/0000-0002-1497-1479 NR 25 TC 20 Z9 20 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD APR 18 PY 2002 VL 532 IS 1-2 BP 111 EP 120 AR PII S0370-2693(02)0198-3 DI 10.1016/S0370-2693(02)01498-3 PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 547VE UT WOS:000175352400015 ER PT J AU Bakac, A AF Bakac, A TI Rapid cross-disproportionation between superoxometal ions and acylperoxyl radicals SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID PEROXYL RADICALS; RATE CONSTANTS; POTENTIALS; COMPLEXES; KINETICS; ELECTRON C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Bakac, A (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. NR 13 TC 7 Z9 7 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD APR 17 PY 2002 VL 124 IS 15 BP 3816 EP 3817 DI 10.1021/ja025507j PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 541YH UT WOS:000175014000008 PM 11942803 ER PT J AU Tucker, MC Doeff, MM Richardson, TJ Finones, R Cairns, EJ Reimer, JA AF Tucker, MC Doeff, MM Richardson, TJ Finones, R Cairns, EJ Reimer, JA TI Hyperfine fields at the Li site in LiFePO4-type olivine materials for lithium rechargeable batteries: A Li-7 MAS NMR and SQUID study SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Tucker, MC (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RI Cairns, Elton/E-8873-2012; OI Cairns, Elton/0000-0002-1179-7591; Doeff, Marca/0000-0002-2148-8047 NR 9 TC 75 Z9 78 U1 3 U2 39 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD APR 17 PY 2002 VL 124 IS 15 BP 3832 EP 3833 DI 10.1021/ja017838m PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 541YH UT WOS:000175014000016 PM 11942811 ER PT J AU Ernst, T Chang, L Cooray, D Salvador, C Jovicich, J Walot, I Boone, K Chlebowski, R AF Ernst, T Chang, L Cooray, D Salvador, C Jovicich, J Walot, I Boone, K Chlebowski, R TI The effects of tamoxifen and estrogen on brain metabolism in elderly women SO JOURNAL OF THE NATIONAL CANCER INSTITUTE LA English DT Article ID SURGICAL-ADJUVANT-BREAST; BOWEL-PROJECT P-1; OVARIECTOMIZED RATS; IN-VIVO; CANCER; SPECTROSCOPY; ESTRADIOL; HIPPOCAMPUS; REPLACEMENT; PREVENTION AB Background. Tamoxifen is used to treat breast cancer and may reduce the risk of breast cancer. However, there are conflicting reports as to whether tamoxifen use is associated with changes in brain metabolism and function or cognitive impairment. Consequently, we assessed the effects of tamoxifen and estrogen on the brain chemistry of elderly women. Methods: We used proton magnetic resonance spectroscopy to measure the concentrations of N-acetyl-containing compounds, myo-inositol (MI), total creatine (creatine plus phosphocreatine), and choline-containing compounds in the frontal white matter, basal ganglia, and hippocampus of 76 elderly women of whom 16 had received tamoxifen therapy, 27 had received estrogen as hormone replacement therapy (HRT), and 33 had received neither (control group). A two-way analysis of variance (ANOVA) was performed to determine the statistical significance of differences in cerebral metabolite concentrations among subject groups and brain regions. All statistical tests were two-sided. Results: Women in the tamoxifen and HRT groups had lower concentrations of MI in all areas than women in the control group (P =.02; overall group effect on ANOVA). Compared with the control group, the tamoxifen group (P =.004) and the HRT group (P =.06) had lower concentrations of MI in their basal ganglia. The MI concentration in the basal ganglia was inversely correlated with the duration of tamoxifen treatment (rho = -.72; P =.005). Conclusions: The reduced concentrations of MI in the brains of women treated with tamoxifen and HRT, compared with those of control women, suggest that tamoxifen has an effect similar to that of estrogen. These results, if confirmed, may alleviate concerns about the safety of using tamoxifen to reduce breast cancer risk in elderly women. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Univ Calif Los Angeles, Harbor Med Ctr, Res & Educ Inst, Dept Radiol, Torrance, CA 90509 USA. Univ Calif Los Angeles, Harbor Med Ctr, Res & Educ Inst, Dept Psychiat, Torrance, CA 90509 USA. RP Ernst, T (reprint author), Brookhaven Natl Lab, Dept Med, Bldg 490,POB 5000, Upton, NY 11973 USA. RI Jovicich, Jorge/D-2293-2010; OI Jovicich, Jorge/0000-0001-9504-7503 NR 37 TC 49 Z9 50 U1 1 U2 2 PU OXFORD UNIV PRESS INC PI CARY PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA SN 0027-8874 J9 J NATL CANCER I JI J. Natl. Cancer Inst. PD APR 17 PY 2002 VL 94 IS 8 BP 592 EP 597 PG 6 WC Oncology SC Oncology GA 542AV UT WOS:000175022000009 PM 11959892 ER PT J AU Ferreira, GC Franco, R Mangravita, A George, GN AF Ferreira, GC Franco, R Mangravita, A George, GN TI Unraveling the substrate-metal binding site of ferrochelatase: An X-ray absorption spectroscopic study SO BIOCHEMISTRY LA English DT Article ID IRON SUPEROXIDE-DISMUTASE; MAMMALIAN FERROCHELATASE; SACCHAROMYCES-CEREVISIAE; MOUSE FERROCHELATASE; DIRECTED MUTAGENESIS; PSEUDOMONAS-OVALIS; ACTIVE-SITE; WILD-TYPE; PROTEIN; METALLOPORPHYRINS AB Ferrochelatase (EC 4.99.1.1), the terminal enzyme of the heme biosynthetic pathway, catalyzes the insertion of ferrous iron into the protoporphyrin IX ring. Ferrochelatases can be arbitrarily divided into two broad categories: those with and those without a [2Fe-2S] center. In this work we have used X-ray absorption spectroscopy to investigate the metal ion binding sites of murine and Saccharomyces cerevisiae (yeast) ferrochelatases, which are representatives of the former and latter categories, respectively. Co2+ and Zn2+ Complexes of both enzymes were studied, but the Fe2+ complex was only studied for yeast ferrochelatase because the [2Fe-2S] center of the murine enzyme interferes with the analysis. Co2+ and Zn2+ binding to site-directed mutants of the murine enzyme were also studied, in which the highly conserved and potentially metal-coordinating residues H207 and Y220 were substituted by residues that should not coordinate metal (i.e., H207N, H207A, and Y220F). Our experiments indicate four-coordinate zinc with Zn(N/O)(3)(S/Cl)(1) coordination for the yeast and Zn(N/O)(2)(S/Cl)(2) coordination for the wild-type murine enzyme. In contrast to zinc, a six-coordinate site for Co2+ coordinated with oxygen or nitrogen was present in both the yeast and murine (wild-type and mutated) enzymes, with evidence of two histidine ligands in both. Like Co2+, Fe2+ bound to yeast ferrochelatase was coordinated by approximately six oxygen or nitrogen ligands, again with evidence of two histidine ligands. For the murine enzyme, mutation of both H207 and Y220 significantly changed the spectra, indicating a likely role for these residues in metal ion substrate binding. This is in marked disagreement with the conclusions from X-ray crystallographic studies of the human enzyme, and possible reasons for this are discussed. C1 Univ S Florida, Coll Med, Inst Biomol Sci, Dept Biochem & Mol Biol, Tampa, FL 33612 USA. Univ S Florida, H Lee Moffitt Canc Ctr & Res Inst, Tampa, FL 33612 USA. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94205 USA. RP Ferreira, GC (reprint author), Univ S Florida, Coll Med, Inst Biomol Sci, Dept Biochem & Mol Biol, Tampa, FL 33612 USA. RI Ferreira, Gloria/A-4709-2012; George, Graham/E-3290-2013; Franco, Ricardo/C-5247-2008 OI Franco, Ricardo/0000-0002-5139-2871 NR 44 TC 37 Z9 37 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD APR 16 PY 2002 VL 41 IS 15 BP 4809 EP 4818 DI 10.1021/bi015814m PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 541XX UT WOS:000175012900007 PM 11939775 ER PT J AU Zunger, A AF Zunger, A TI On the farsightedness (hyperopia) of the standard k center dot p model SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 7th International Conference on Optics and Excitons in Confined Systems (OECS7) CY SEP 03-07, 2001 CL MONTPELLIER, FRANCE ID INAS/GAAS QUANTUM DOTS; ELECTRONIC-STRUCTURE; EFFECTIVE-MASS; HIGH-PRESSURE; LIGHT-HOLE; SUPERLATTICES; GAAS/ALAS; HETEROSTRUCTURES; STATES; PHOTOLUMINESCENCE AB The use of a small number of bands in conventional k . p treatment of nanostructures leads to "farsightedness" (hyperopia), whereby the correct, detailed atomistic symmetry is not seen by the model, but only the global landscape symmetry is noted. Consequently, the real symmetry is confused with a higher symmetry. As a result, a number of important symmetry-mandated physical couplings are unwittingly set to zero in the k . p approach. These are often introduced, after-the-fact. "by hand", via an ansatz. Sometimes physical effects (e.g., piezoelectricity) are invoked to fix the otherwise incorrect symmetry. Thus, whereas in atomistic theories of nanostructures (tight-binding, pseudopotentials) the physically correct symmetry is naturally forced upon us by the structure itself, in the standard k . p model it is accommodated ex post facto once it is known from sources outside the model itself. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Zunger, Alex/A-6733-2013 NR 54 TC 35 Z9 35 U1 0 U2 1 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA POSTFACH 101161, 69451 WEINHEIM, GERMANY SN 1862-6300 EI 1862-6319 J9 PHYS STATUS SOLIDI A JI Phys. Status Solidi A-Appl. Mat. PD APR 16 PY 2002 VL 190 IS 2 BP 467 EP 475 DI 10.1002/1521-396X(200204)190:2<467::AID-PSSA467>3.0.CO;2-4 PG 9 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA 552MB UT WOS:000175623200030 ER PT J AU Kanemitsu, Y Ando, M Matsuda, K Saiki, T White, CW AF Kanemitsu, Y Ando, M Matsuda, K Saiki, T White, CW TI Photoluminescence spectra and dynamics of single CdS nanocrystals studied by scanning near-field optical microscopy SO PHYSICA STATUS SOLIDI A-APPLIED RESEARCH LA English DT Article; Proceedings Paper CT 7th International Conference on Optics and Excitons in Confined Systems (OECS7) CY SEP 03-07, 2001 CL MONTPELLIER, FRANCE ID SEQUENTIAL ION-IMPLANTATION; GAAS NANOCRYSTALS; BEAM SYNTHESIS; MATRICES AB Photoluminescence (PL) spectra and dynamics of hexagonal CdS nanocrystals embedded in Al2O3 matrices have been studied by means of a scanning near-field optical microscope at 8 K. The PL spectra of individual CdS nanocrystals show narrow lines with single-exponential decay profiles, although the macroscopic PL spectra measured by conventional optics show a broad band with non-exponential decay profiles. The PL peaks are observed at energies below the lowest free-exciton energy of CdS nanocrystals. The luminescence mechanism of CdS nanocrystals is discussed. C1 Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300101, Japan. Kanagawa Acad Sci & Technol, Kawasaki, Kanagawa 2130012, Japan. Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Kanemitsu, Y (reprint author), Nara Inst Sci & Technol, Grad Sch Mat Sci, 8916-5 Takayama, Nara 6300101, Japan. NR 14 TC 10 Z9 10 U1 0 U2 2 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0031-8965 J9 PHYS STATUS SOLIDI A JI Phys. Status Solidi A-Appl. Res. PD APR 16 PY 2002 VL 190 IS 2 BP 537 EP 540 DI 10.1002/1521-396X(200204)190:2<537::AID-PSSA537>3.0.CO;2-C PG 4 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA 552MB UT WOS:000175623200041 ER PT J AU Tanaka, K Robel, I Janko, B AF Tanaka, K Robel, I Janko, B TI Electronic structure of multiquantum giant vortex states in mesoscopic superconducting disks SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID SCANNING TUNNELING SPECTROSCOPY; MAGNETIC-FIELD; BI2SR2CACU2O8+DELTA; PENETRATION; PSEUDOGAP; VORTICES; DENSITY; CORES AB We report self-consistent calculations of the microscopic electronic structure of the so-called giant vortex states. These multiquantum vortex states, detected by recent magnetization measurements on submicron disks, are qualitatively different from the Abrikosov vortices in the bulk. We find that, in addition to multiple branches of bound states in the core region, the local tunneling density of states exhibits Tomasch oscillations caused by the single-particle interference arising from quantum confinement. These features should be directly observable by scanning tunneling spectroscopy. C1 Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. RP Janko, B (reprint author), Argonne Natl Lab, Div Sci Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Robel, Istvan/D-4124-2011 OI Robel, Istvan/0000-0002-9738-7728 NR 31 TC 26 Z9 26 U1 1 U2 7 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 16 PY 2002 VL 99 IS 8 BP 5233 EP 5236 DI 10.1073/pnas.082096799 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 543DX UT WOS:000175087000093 PM 16578872 ER PT J AU Qian, Q Tyson, TA Dubourdieu, C Bossak, A Senateur, JP Deleon, M Bai, J Bonfait, G AF Qian, Q Tyson, TA Dubourdieu, C Bossak, A Senateur, JP Deleon, M Bai, J Bonfait, G TI Structural studies of annealed ultrathin La0.8MnO3 films SO APPLIED PHYSICS LETTERS LA English DT Article ID LOW-FIELD MAGNETORESISTANCE; EPITAXIAL THIN-FILMS; MAGNETIC-ANISOTROPY; TRANSPORT-PROPERTIES; MANGANITE FILMS; STRAIN; MAGNETOTRANSPORT; DEPOSITION; DEPENDENCE; DISORDER AB A detailed study of the long-range, nanoscale, and local structure of La0.8MnO3 films of varying thickness was performed. These measurements give insight on the relative volumes of the insulating and metallic regions. A thin metallic surface region is found in all films. The nature of the film growth is also discussed. (C) 2002 American Institute of Physics. C1 New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA. Ecole Natl Super Phys Grenoble, Mat & Genie Phys Lab, CNRS, UMR 5628, F-38402 St Martin Dheres, France. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Nucl & Technol Inst, Dept Chem, P-2686 Sacavem, Portugal. RP Qian, Q (reprint author), New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA. RI BOSAK, Alexei/J-7895-2013; Bai, Jianming/O-5005-2015; OI Bonfait, Gregoire/0000-0003-3090-2884 NR 26 TC 5 Z9 5 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 15 PY 2002 VL 80 IS 15 BP 2663 EP 2665 DI 10.1063/1.1470689 PG 3 WC Physics, Applied SC Physics GA 540QA UT WOS:000174938600014 ER PT J AU Seager, CH Myers, SM Vaandrager, B Nelson, JS AF Seager, CH Myers, SM Vaandrager, B Nelson, JS TI Isotope effects on the rate of electron-beam dissociation of Mg-H complexes in GaN SO APPLIED PHYSICS LETTERS LA English DT Article ID DESORPTION; HYDROGEN; REACTIVATION; IRRADIATION; DEUTERIUM; STATE; GAAS; ALN; INN AB The effect of low-energy electron-beam irradiation on the stability of acceptor-hydrogen complexes in Mg-doped GaN has been directly examined with infrared optical spectroscopy. Consistent with prior electrical transport data, we find that Mg-H pairs begin to break apart under 25 keV electron-beam exposure at doses of a few mC/cm(2). However, we find that, even after long exposures, roughly 1/2 of the acceptor-hydrogen pairs remain unaffected by the electron exposure. Using Mg-doped samples that have been vacuum annealed and D-2 gas exposed, we demonstrate that there is a large (similar tox5) isotopic shift in the beam-induced debonding rate of these acceptor-hydrogen complexes. H and D remain in the material during these treatments, and Mg-H or Mg-D reforms during postirradiation annealing. The implications of these observations for understanding the nature of the debonding process and the subsequent reactions of the detached H/D in the GaN lattice are discussed. (C) 2002 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Uniroyal Optoelect, Tampa, FL 33619 USA. RP Seager, CH (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RI Schaff, William/B-5839-2009 NR 27 TC 20 Z9 20 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 15 PY 2002 VL 80 IS 15 BP 2693 EP 2695 DI 10.1063/1.1468917 PG 3 WC Physics, Applied SC Physics GA 540QA UT WOS:000174938600024 ER PT J AU Siegal, MP Clem, PG Dawley, JT Ong, RJ Rodriguez, MA Overmyer, DL AF Siegal, MP Clem, PG Dawley, JT Ong, RJ Rodriguez, MA Overmyer, DL TI All solution-chemistry approach for YBa2Cu3O7-delta-coated conductors SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS; SUPERCONDUCTING TAPES; EPITAXIAL-GROWTH; CURRENT-DENSITY; BA2YCU3O7-X; DEPOSITION; YBA2CU3O7; BATIO3 AB A need exists for low-cost coated-conductor fabrication methods for applications in magnet and electric-power technologies. We demonstrate high-critical current density (J(c)) YBa2Cu3O7-delta (YBCO) films grown on Nb-doped SrTiO3 (Nb:STO) buffered Ni(100) tapes. All buffer and superconductor layers are deposited using solution chemistry. A 50 nm thick Nb:STO seed layer on Ni(100) acts as a template for the growth of subsequent thicker layers of Nb:STO. Nb doping improves the electrical conductivity and oxygen diffusion barrier properties of STO. YBCO grows heteroepitaxially directly on this buffer layer, resulting in a transport J(c)(77 K)=1.3 MA/cm(2). (C) 2002 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87145 USA. Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA. RP Siegal, MP (reprint author), Sandia Natl Labs, Albuquerque, NM 87145 USA. NR 22 TC 77 Z9 81 U1 2 U2 16 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 15 PY 2002 VL 80 IS 15 BP 2710 EP 2712 DI 10.1063/1.1470225 PG 3 WC Physics, Applied SC Physics GA 540QA UT WOS:000174938600030 ER PT J AU Ott, KC Clark, NC Rau, JA AF Ott, KC Clark, NC Rau, JA TI Hysteresis in activity of microporous lean NOx catalysts in the presence of water vapor SO CATALYSIS TODAY LA English DT Article; Proceedings Paper CT 5th Europacat Conference CY SEP 02-07, 2001 CL LIMERICK, IRELAND DE lean NOx; zeolite; ammonia SCR; water; hysteresis ID NITROGEN-OXIDES; REDUCTION; REMOVAL AB Increasingly stringent ambient air quality standards coupled with the need to improve fuel economy has drawn significant attention to the search for emission control systems for lean burn engine vehicles. Much of the focus has been on zeolite-based catalysts for die conversion of NOx to N-2 for automotive exhaust emission control. Under certain conditions, these catalysts are highly active catalysts for the reduction of NOx using hydrocarbons as the reductant. However, many of these catalysts suffer from a variety of deactivation processes such as irreversible poisoning by SOx or hydrothermal dealumination. In addition to these deactivation processes, a recent focus of our research has been on the influence of water vapor on the activity of zeolite-bused catalysts at low operating temperatures. We observe a hysteresis in catalytic activity of lean NOx reduction (NO feed concentrations <100 ppm) upon increasing and decreasing temperature ramps at the low end of the operating window, that being from 100 to 300 degreesC using hydrocarbons as reductants. We describe these reversible influences of water vapor and the implications for this hysteresis in catalytic activity for the application of zeolite-based catalysts in lean NOx catalysis, and compare these results to the instance of using ammonia as reductant. (C) 2002 Published by Elsevier Science B.V. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ott, KC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 12 TC 5 Z9 6 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5861 J9 CATAL TODAY JI Catal. Today PD APR 15 PY 2002 VL 73 IS 3-4 BP 223 EP 231 AR PII S0920-5861(02)00004-4 DI 10.1016/S0920-5861(02)00004-4 PG 9 WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 566BL UT WOS:000176406900003 ER PT J AU Darlington, RM McAbee, TL Rodrigue, G AF Darlington, RM McAbee, TL Rodrigue, G TI Large eddy simulation and ALE mesh motion in Rayleigh-Taylor instability simulation SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE large eddy simulations; ALE; Rayleigh-Taylor instability ID TURBULENT AB Many large eddy simulation (LES) techniques have been developed for stationary computational meshes. This study applies a single equation LES to Arbitrary Lagrangian-Eulerian (ALE) simulations of Rayleigh-Taylor instability and investigates its effects. Behavior of LES is similar for Eulerian and ALE simulations for the test problem studied. However, the motion of the mesh can be tied to the subgrid scale model in the form of a relaxation weight based on subgrid scale energy. This increases mesh resolution in areas of high subgrid scale energy. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. RP Darlington, RM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 12 TC 7 Z9 7 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD APR 15 PY 2002 VL 144 IS 3 BP 261 EP 276 AR PII S0010-4655(02)00263-1 DI 10.1016/S0010-4655(02)00263-1 PG 16 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 554UP UT WOS:000175755800003 ER PT J AU George, JA Colvin, ME Krishnan, VV AF George, JA Colvin, ME Krishnan, VV TI A simulator for ensemble quantum computing SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE quantum computer; NMR spectroscopy; numerical integration; simulation ID MESOSCOPIC JOSEPHSON-JUNCTIONS; LOGIC GATES; COMPUTATION; ALGORITHM; IMPLEMENTATION; FACTORIZATION; SPECTROSCOPY; SEARCH AB A quantum computer simulator based on the principles of ensemble quantum computing using nuclear magnetic resonance (NMR) is presented. The first version of ensemble quantum computer simulator (enQC-lator) is based on density matrix description of the NMR and models the implementation of quantum computation in a NMR spectrometer. The simulator is designed to perform general purpose quantum computing and will be useful to evaluate quantum-computing codes prior to their actual implementation and to design new ones. The performance of the simulator is demonstrated in several logical operations and algorithms. (C) 2002 Published by Elsevier Science B.V. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Computat Biol Grp, Livermore, CA 94551 USA. RP Krishnan, VV (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, L-448,7000 E Ave, Livermore, CA 94551 USA. RI Krishnan, Krish/A-6859-2010 NR 37 TC 0 Z9 0 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD APR 15 PY 2002 VL 144 IS 3 BP 277 EP 283 AR PII S0010-4655(02)00266-7 DI 10.1016/S0010-4655(02)00266-7 PG 7 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 554UP UT WOS:000175755800004 ER EF