FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Scott, JR Yan, B Stoner, DL AF Scott, JR Yan, B Stoner, DL TI Interaction of amino acids and peptides with minerals to produce biosignatures observable by laser desorption fourier transform mass spectrometry SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho Natl Lab, Dept Chem, Idaho Falls, ID 83415 USA. Univ Idaho, Dept Chem, Idaho Falls, ID 83402 USA. EM scotjr@inel.gov; yanbz@if.uidaho.edu; stondl@if.uidaho.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A35 EP A35 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700070 ER PT J AU Severin, KP Brown, R Babaluk, J Campbell, JL Newville, M AF Severin, KP Brown, R Babaluk, J Campbell, JL Newville, M TI A comparison of line scans and maps using EPMA, micro-XRF, and PIXE SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Alaska Fairbanks, Dept Geol & Geophys, Fairbanks, AK 99775 USA. Univ Alaska Fairbanks, Dept Geol & Geophys, Fairbanks, AK 99775 USA. US Fish & Wildlife Serv, Fairbanks, AK 99701 USA. Fisheries & Oceans Canada, Winnipeg, MB R3T 2N6, Canada. Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada. Argonne Natl Lab, GSECARS, Argonne, IL 60439 USA. EM fnkps@uaf.edu; randy_j_brown@fws.gov; babalukj@dfo-mpo.gc.ca; jlc@physics.uoguelph.ca; newville@cars.uchicago.edu NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A61 EP A61 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700119 ER PT J AU Shaw, G Hudson, GB Moran, J Nimz, G Conklin, M AF Shaw, G Hudson, GB Moran, J Nimz, G Conklin, M TI Age-dating groundwater discharge in the Merced River basin, California using noble gasses and chlorine-36 SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA USA. EM gshaw@ucmerced.edu; hudson5@llnl.gov; moran10@llnl.gov; nimz1@llnl.gov; mconklin@ucmerced.edu NR 0 TC 0 Z9 0 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A721 EP A721 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702219 ER PT J AU Shepler, CG Hull, SC Letain, TE Hazen, TC Nitsche, H Clark, SB AF Shepler, CG Hull, SC Letain, TE Hazen, TC Nitsche, H Clark, SB TI The interaction of U(VI) with Bacillus sphaericus SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Washington State Univ, Dept Chem, Ctr Multiphase Environm Res, Pullman, WA 99164 USA. Idaho Natl Lab, Idaho Falls, ID USA. Lawrence Berkeley Lab, Berkeley, CA USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. EM cgillaspie@wsu.edu; hulllc@inel.gov; letain2@llnl.gov; TCHazen@lbl.gov; HNitsche@lbl.gov; s_clark@wsu.edu RI Hazen, Terry/C-1076-2012 OI Hazen, Terry/0000-0002-2536-9993 NR 0 TC 0 Z9 0 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A233 EP A233 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700452 ER PT J AU Singer, DM Catalano, JG Brown, GE AF Singer, DM Catalano, JG Brown, GE TI Calcium oxalate surface interactions with lead SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA. Argonne Natl Lab, Argonne, IL 60439 USA. EM dmsinger@stanford.edu; catalano@anl.gov; gordon@pangea.stanford.edu RI Catalano, Jeffrey/A-8322-2013 OI Catalano, Jeffrey/0000-0001-9311-977X NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A497 EP A497 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701378 ER PT J AU Smith, RW Fujita, Y AF Smith, RW Fujita, Y TI In situ stabilization of Sr-90 by microbially facilitated calcite precipitation SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Idaho, Dept Biol & Agr Engn, Idaho Falls, ID 83402 USA. Idaho Natl Engn Lab, Dept Biotechnol, Idaho Falls, ID 83415 USA. EM smithbob@uidaho.edu; fujiy@inel.gov NR 0 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A429 EP A429 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701245 ER PT J AU Spycher, N Pruess, K AF Spycher, N Pruess, K TI A non-iterative model for H2O-CO2 mutual solubility in chloride brines SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID ID CO2 C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM nspycher@lbl.gov RI Spycher, Nicolas/E-6899-2010 NR 3 TC 1 Z9 1 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A870 EP A870 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702502 ER PT J AU Steefel, CI Brantley, SL Navarre, AK Hu, QH AF Steefel, CI Brantley, SL Navarre, AK Hu, QH TI Rate control in low porosity diffusion-reaction systems SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. Penn State Univ, Dept Geosci, University Pk, PA 16801 USA. Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA. EM CISteefel@lbl.gov; brantley@essc.psu.edu; anavarre@geosc.psu.edu; hu7@llnl.gov RI Hu, Qinhong/C-3096-2009; Steefel, Carl/B-7758-2010 OI Hu, Qinhong/0000-0002-4782-319X; NR 0 TC 0 Z9 0 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A181 EP A181 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700353 ER PT J AU Strap, JL Colwell, FS Crawford, RL AF Strap, JL Colwell, FS Crawford, RL TI Characterization of archaeal diversity associated with planktonic and biofilm subsurface communities from the Snake River Plain aquifer SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Idaho, Moscow, ID 83843 USA. Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. EM jstrap@uidaho.edu; FXC@inel.gov; crawford@uidaho.edu RI Strap, Janice/H-2395-2012 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A819 EP A819 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702405 ER PT J AU Strawn, DG Ryser, A Marcus, MA Johnson-Maynard, J Moller, G Gunter, ME AF Strawn, DG Ryser, A Marcus, MA Johnson-Maynard, J Moller, G Gunter, ME TI Micro-spectroscopic investigation of selenium speciation in reclaimed mine soils from southeastern Idaho SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Idaho, Moscow, ID 83843 USA. Berkley Natl Lab, Adv Light Source, Berkeley, CA USA. EM dgstrawn@uidaho.edu RI Moller, Gregory/B-1706-2008; Johnson-Maynard, Jodi/E-9518-2013 NR 0 TC 0 Z9 0 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A819 EP A819 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702406 ER PT J AU Sturchio, NC Bohlke, JK Horita, J Gu, BH Brown, GM Hatzinger, PB AF Sturchio, NC Bohlke, JK Horita, J Gu, BH Brown, GM Hatzinger, PB TI Environmental isotope forensics of perchlorate SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Illinois, Chicago, IL 60607 USA. US Geol Survey, Reston, VA 20192 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Shaw Environm, Lawrenceville, NJ 08648 USA. RI Gu, Baohua/B-9511-2012 OI Gu, Baohua/0000-0002-7299-2956 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A203 EP A203 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700394 ER PT J AU Tepley, FJ Lundstrom, CC Williams, RW Gill, JB AF Tepley, FJ Lundstrom, CC Williams, RW Gill, JB TI U-Th-Ra disequilibria and the time scale of andesite differentiation at Arenal Volcano, Costa Rica (1968-2003) SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oregon State Univ, Corvallis, OR 97331 USA. Univ Illinois, Dept Geol, Urbana, IL 61801 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA. EM tepley@coas.oregonstate.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A340 EP A340 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701069 ER PT J AU Thornton, EC Zhong, L Oostrom, M Deng, B AF Thornton, EC Zhong, L Oostrom, M Deng, B TI Vadose zone remediation by in-situ gaseous reduction SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99354 USA. Univ Missouri, Columbia, MO 65211 USA. EM edward.thomton@pnl.gov; DengB@missouri.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A820 EP A820 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702408 ER PT J AU Trainor, TP Eng, PJ Chaka, AM Lo, CS Tanwar, K Ghose, SK Brown, GE Catalano, JG Waychunas, GA Tempelton, AS AF Trainor, TP Eng, PJ Chaka, AM Lo, CS Tanwar, K Ghose, SK Brown, GE Catalano, JG Waychunas, GA Tempelton, AS TI Structure and reactivity of hydroxylated hematite surfaces: Application of surface x-ray diffraction and spectroscopy SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Alaska Fairbanks, Dept Chem & Biochem, Fairbanks, AK 99775 USA. Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Stanford Univ, Dept Geol & Env Sci, Stanford, CA 94305 USA. Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. Univ Calif San Diego, Scripps Inst Oceanog, Marine Biol Div, La Jolla, CA 92093 USA. EM fftpt@uaf.edu; eng@cars.uchicago.edu; anne.chaka@nist.gov; cynthia.lo@nist.gov; ftkjt@uaf.edu; ghose@cars.uchicago.edu; gordon@pangea.stanford.edu; catalano@anl.gov; gawaychunas@lbl.gov; atempleton@ucsd.edu RI Catalano, Jeffrey/A-8322-2013 OI Catalano, Jeffrey/0000-0001-9311-977X NR 0 TC 1 Z9 1 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A486 EP A486 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701355 ER PT J AU Turick, CE Ekechukwu, AA Lowy, DA AF Turick, CE Ekechukwu, AA Lowy, DA TI Electrochemical analysis at the microbe/mineral interface SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Savannah River Natl Lab, Aiken, SC 29808 USA. Nova Res Inc, Alexandria, VA 22308 USA. EM Charles.Turick@srs.gov; Amy.Ekechukwu@srs.gov; dlowy@cbmse.nrl.navy.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A370 EP A370 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701129 ER PT J AU Tyliszczak, T Nilsson, HJ Werme, L Shuh, DK AF Tyliszczak, T Nilsson, HJ Werme, L Shuh, DK TI Prospects for actinide STXM SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. SKB, S-10240 Stockholm, Sweden. Univ Uppsala, Dept Phys, S-75121 Uppsala, Sweden. EM tolek@lbl.gov; HJNilsson@lbl.gov; Lars.Werme@skb.se; DKShuh@lbl.gov NR 0 TC 1 Z9 1 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A599 EP A599 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701572 ER PT J AU Um, W Serne, RJ AF Um, W Serne, RJ TI Iodide adsorption and transport at the Hanford Site, Washington SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM wooyong.um@pnl.gov; jeff.serne@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A870 EP A870 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702503 ER PT J AU Valiev, M Bylaska, E Tsemekman, K Bogatko, S Weare, J AF Valiev, M Bylaska, E Tsemekman, K Bogatko, S Weare, J TI New developments of fast computational methods for first principles geochemical and geophysical simulations SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Washington, Seattle, WA 98195 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. EM marat.valiev@pnl.gov; eric.bylaska@pnl.gov; kirilt@ikazki01.chem.washington.edu; sbogotko@chem.ucsd.edu; jweare@ucsd.edu RI Bogatko, Stuart/C-8394-2013 OI Bogatko, Stuart/0000-0001-9759-2580 NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A511 EP A511 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701404 ER PT J AU Van Soest, MC Mariner, RH Evans, WC AF Van Soest, MC Mariner, RH Evans, WC TI Helium isotope systematics in geothermal fluids of the Cascade volcanic arc SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Berkeley Lab, Ctr Isotope Geochem, Berkeley, CA 94704 USA. US Geol Survey, Menlo Pk, CA 94025 USA. EM mcvansoest@lbl.gov; rmariner@usgs.gov; wcevans@usgs.gov RI Evans, William/J-4283-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A275 EP A275 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700535 ER PT J AU Wang, YF Xu, HF AF Wang, YF Xu, HF TI Nanogeochemistry: Geochemical reactions in nanopores SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A517 EP A517 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701415 ER PT J AU Wellman, DM Mattigod, SV Arey, BW Wood, MI Forrester, SW AF Wellman, DM Mattigod, SV Arey, BW Wood, MI Forrester, SW TI In-situ identification of uranium minerals in concrete SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. Fluor Hanford, Richland, WA USA. Washington State Univ, Pullman, WA 99164 USA. EM dawn.wellman@pnl.gov; shas.mattigod@pnl.gov; bruce.arey@pnl.gov; Marcus_I_Wood@rl.gov; master819@hotmail.com NR 0 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A468 EP A468 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701321 ER PT J AU Wolery, T Peterman, Z Carroll, S Jove-Colon, C Sutton, M Rard, J Wijesinghe, A AF Wolery, T Peterman, Z Carroll, S Jove-Colon, C Sutton, M Rard, J Wijesinghe, A TI Dust salts and deliquescence on waste packages in an unsaturated-zone repository SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. EM wolery@llnl.gov; peterman@usgs.gov; carroll6@llnl.gov; cfjovec@sandia.gov; sutton18@llnl.gov; rard1@llnl.gov; wijesinghe1@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A413 EP A413 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701213 ER PT J AU Xiong, YL Nowak, EJ Brush, LH AF Xiong, YL Nowak, EJ Brush, LH TI Predicting actinide solubilities in various solutions up to concentrated brines: The Fracture-Matrix Transport (FMT) Code SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Sandia Natl Labs, Carlsbad, NM 88220 USA. EM yxiong@sandia.gov NR 1 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A417 EP A417 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701220 ER PT J AU Xu, HF Chen, TH Wang, YF AF Xu, HF Chen, TH Wang, YF TI Mechanical, chemical, magnetic, transport, and electronic properties changes at the nanometer scale SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Wisconsin, Madison, WI 53706 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. EM hfxu@geology.wisc.edu; ywang@sandia.gov NR 0 TC 0 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A522 EP A522 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701426 ER PT J AU Yabusaki, SB Fang, Y Waichler, SR AF Yabusaki, SB Fang, Y Waichler, SR TI Building conceptual process models of field scale uranium reactive transport for the Hanford 300 Area SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM yabusaki@pnl.gov; yilin.fang@pnl.gov; scott.waichler@pnl.gov RI Fang, Yilin/J-5137-2015 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A414 EP A414 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701215 ER PT J AU Yan, B McJunkin, TR Stoner, DL Scott, JR AF Yan, B McJunkin, TR Stoner, DL Scott, JR TI Mineral identification in basalts using automated mass spectral data analysis SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Idaho, Dept Chem, Idaho Falls, ID 83402 USA. Idaho Natl Engn Lab, Dept Mat Technol, Idaho Falls, ID 83415 USA. Idaho Natl Engn Lab, Dept Chem, Idaho Falls, ID 83415 USA. EM yanbz@if.uidaho.edu; mcjtur@inel.gov; stondl@if.uidaho.edu; scotjr@inel.gov RI McJunkin, Timothy/G-8385-2011; Scott, Jill/G-7275-2012 OI McJunkin, Timothy/0000-0002-4987-9170; NR 3 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A797 EP A797 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702364 ER PT J AU Yanina, SV Rosso, KM Meakin, P AF Yanina, SV Rosso, KM Meakin, P TI Defect distribution and dissolution morphologies on low-index surfaces of alpha-quartz. SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99353 USA. Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM svetlana.yanina@pnl.gov; kevin.rosso@pnl.gov; meakp@inel.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A488 EP A488 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701359 ER PT J AU Yoon, TH Borch, T Benzerara, K Fendorf, S Tyliszczak, T Brown, GE AF Yoon, TH Borch, T Benzerara, K Fendorf, S Tyliszczak, T Brown, GE TI Soft X-ray spectromicroscopy study of chemical heterogeneities in iron precipitates formed at or near bacterial cells SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Stanford Univ, GES Dept, Stanford, CA 94305 USA. LBNL, Div Chem Sci, Berkeley, CA USA. EM taeyoon@pangea.stanford.edu RI Borch, Thomas/A-2288-2008 OI Borch, Thomas/0000-0002-4251-1613 NR 2 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A598 EP A598 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701570 ER PT J AU Zachara, JM McKinley, J Liu, CX Wang, ZM Catalano, J Brown, G Qafoku, N AF Zachara, JM McKinley, J Liu, CX Wang, ZM Catalano, J Brown, G Qafoku, N TI Molecular speciation, mineral residence, and geochemical behavior of U in contaminated subsurface sediments SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Stanford Univ, Stanford, CA 94305 USA. RI Wang, Zheming/E-8244-2010; Liu, Chongxuan/C-5580-2009 OI Wang, Zheming/0000-0002-1986-4357; NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A618 EP A618 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702016 ER PT J AU Zhang, GX Spycher, N Sonnenthal, E Steefel, C AF Zhang, GX Spycher, N Sonnenthal, E Steefel, C TI Reactive transport modeling of acid gas generation and condensation SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. EM gxzhang@lbl.gov RI Steefel, Carl/B-7758-2010; Sonnenthal, Eric/A-4336-2009 NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A157 EP A157 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700305 ER PT J AU Zhang, Z Fenter, P Kelly, SD Catalano, JG Kubicki, JD Bandura, A Wesolowski, DJ Machesky, ML Sturchio, NC Bedzyk, MJ AF Zhang, Z Fenter, P Kelly, SD Catalano, JG Kubicki, JD Bandura, A Wesolowski, DJ Machesky, ML Sturchio, NC Bedzyk, MJ TI Structure of Zn2+ at rutile TiO2(110)-aqueous solution interface SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Argonne, IL 60439 USA. Penn State Univ, University Pk, PA 16802 USA. St Petersburg State Univ, Dept Theoret Phys, St Petersburg 198904, Russia. Oak Ridge Natl Lab, Oak Ridge, TN USA. Univ Illinois, Chicago, IL 60680 USA. Northwestern Univ, Evanston, IL 60208 USA. EM zhanzhang@anl.gov; fenter@anl.gov; skelly@anl.gov; catalano@anl.gov; kubicki@geosc.psu.edu; andrei.bandura@pobox.spbu.ru; wesolowskid@ornl.gov; machesky@sws.uiuc.edu; sturchio@uic.edu; bedzyk@northwestern.edu RI Bedzyk, Michael/B-7503-2009; Catalano, Jeffrey/A-8322-2013; Bedzyk, Michael/K-6903-2013; Bandura, Andrei/I-2702-2013; Kubicki, James/I-1843-2012 OI Catalano, Jeffrey/0000-0001-9311-977X; Bandura, Andrei/0000-0003-2816-0578; Kubicki, James/0000-0002-9277-9044 NR 1 TC 0 Z9 0 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A50 EP A50 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700098 ER PT J AU Ziemann, T Burns, PC Soderholm, L Skanthakumar, S AF Ziemann, T Burns, PC Soderholm, L Skanthakumar, S TI The crystal chemistry of neptunium sulfates and phosphates SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Notre Dame, Dept Civil Engn & Geol Sci, Notre Dame, IN 46556 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. EM tziemann@nd.edu; pburns@nd.edu; ls@anl.gov; skantha@anl.gov RI Burns, Peter/J-3359-2013 NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A476 EP A476 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701336 ER PT J AU Zhang, Y Person, M Merino, E Szpakiewcz, M AF Zhang, Y Person, M Merino, E Szpakiewcz, M TI Evaluation of soluble benzene migration in the Uinta Basin SO GEOFLUIDS LA English DT Article DE benzene; Uinta Basin; water washing ID HYDROCARBON GENERATION; DEEP SUBSURFACE; UTAH; ORIGIN; MODEL; OIL; EVOLUTION; FLOW AB Field sampling and mathematical modeling are used to study the long-distance transport and attenuation of petroleum -derived benzene in the Uinta Basin, Utah. Benzene concentration was measured from oil and oil field formation waters of the Altamont-Bluebell and Pariette Bench oil fields in the basin. It was also measured from springs located in the regional groundwater discharge areas, hydraulically down-gradient from the oil fields sampled. The average benzene concentration in oils and co-produced waters is 1946 and 4.9 ppm at the Altamont-Bluebell field and 1533 and 0.6 ppm at the Pariette Bench field, respectively. Benzene concentration is below the detection limit in all springs sampled. Mathematical models are constructed along a north-south trending transect across the basin through both fields. The models represent groundwater flow, heat transfer and advective/dispersive benzene transport in the basin, as well as benzene diffusion within the oil reservoirs. The coupled groundwater flow and heat transfer model is calibrated using available thermal and hydrologic data. We were able to reproduce the observed excess fluid pressure within the lower Green River Formation and the observed convective temperature anomalies across the northern basin. Using the computed best-fit flow and temperature, the coupled transport model simulates water washing of benzene from the oil reservoirs. Without the effect of benzene attenuation, dissolved benzene reaches the regional groundwater discharge areas in measurable concentration (>0.01 ppm); with attenuation, benzene concentration diminishes to below the detection limit within 1-4 km from the reservoirs. Attenuation also controls the amount of water washing over time. In general, models that represent benzene attenuation in the basin produce results more consistent with field observations. C1 Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA. Idaho Natl Engn & Environm Lab, Fossil Energy Technol, Idaho Falls, ID USA. RP Zhang, Y (reprint author), Indiana Univ, Dept Geol Sci, 1001 E 10th St, Bloomington, IN 47405 USA. EM ylzhang@indiana.edu NR 44 TC 6 Z9 6 U1 2 U2 8 PU BLACKWELL PUBL LTD PI OXFORD PA 108 COWLEY RD, OXFORD OX4 1JF, OXON, ENGLAND SN 1468-8115 J9 GEOFLUIDS JI Geofluids PD MAY PY 2005 VL 5 IS 2 BP 106 EP 123 DI 10.1111/j.1468-8123.2005.00102.x PG 18 WC Geochemistry & Geophysics; Geology SC Geochemistry & Geophysics; Geology GA 926AL UT WOS:000229095000003 ER PT J AU Matmon, A Schwartz, DP Finkel, R Clemmens, S Hanks, T AF Matmon, A Schwartz, DP Finkel, R Clemmens, S Hanks, T TI Dating offset fans along the Mojave section of the San Andreas fault using cosmogenic Al-26 and Be-10 SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN LA English DT Article DE San Andreas fault; offset alluvial fans; cosmogenic isotopes; slip rate; Little Rock Creek ID PRECARIOUSLY BALANCED ROCKS; SOUTHERN-CALIFORNIA; PRODUCTION-RATES; SLIP RATES; PALEOSEISMIC SITE; LARGE EARTHQUAKES; PALLETT CREEK; KUNLUN FAULT; OWENS-VALLEY; STRIKE-SLIP AB Analysis of cosmogenic Be-10 and Al-26 in samples collected from exposed boulders (n = 20) and from buried sediment (n = 3) from offset fans along the San Andreas fault near Little Rock, California, yielded ages, ranging from 16 to 413 ka, which increase with distance from their source at the mouth of Little Rock Creek. In order to determine the age of the relatively younger fans, the erosion rate of the boulders and the cosmogenic nuclide inheritance from exposure prior to deposition in the fan were established. Cosmogenic nuclide inheritance values that range between 8.5 x 10(3) and 196 x 10(3) atoms Be-10 g(-1) quartz were determined by measuring the concentrations and ratios of Be-10 and Al-26 in boulders (n = 10) and fine sediment (n = 7) at the outlet of the present active stream. Boulder erosion rate, ranging between 17 and 160 mm k.y.(-1), was estimated by measuring Be-10 and Al-26 concentrations in nearby bedrock outcrops (n = 8). Since the boulders on the fans represent the most resistant rocks in this environment, we used the lowest rate for the age calculations. Monte Carlo simulations were used to determine ages of 16 +/- 5 and 29 +/- 7 ka for the two younger fan surfaces. Older fans (older than 100 ka) were dated by analyzing Be-10 and Al-26 concentrations in buried sand samples. The ages of the three oldest fans range between 227 +/- 242 and 413 +/- 185 ka. Although fan age determinations are accompanied by large uncertainties, the results of this study show a clear trend of increasing fan ages with increasing distance from the source near Little Rock Creek and provide a long-term slip rate along this section of the San Andreas fault. Slip rate along the Mojave section of the San Andreas fault for the past 413 k.y. can be determined in several ways. The average slip rate calculated from the individual fan ages is 4.2 +/- 0.9 cm yr(-1). A linear regression through the data points implies a slip rate of 3.7 +/- 1.0 cm yr(-1). A most probable slip rate of 3.0 +/- 1.0 cm yr(-1) is determined by using a chi(2) test. These rates suggest that the average slip along the Mojave section of the San Andreas fault has been relatively constant over this time period. The slip rate along the Mojave section of the San Andreas fault, determined in this study, agrees well with previous slip rate calculations for the Quaternary. C1 US Geol Survey, Menlo Pk, CA 94025 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Matmon, A (reprint author), US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA. EM amatmon@usgs.gov NR 64 TC 63 Z9 63 U1 1 U2 8 PU GEOLOGICAL SOC AMERICA, INC PI BOULDER PA PO BOX 9140, BOULDER, CO 80301-9140 USA SN 0016-7606 J9 GEOL SOC AM BULL JI Geol. Soc. Am. Bull. PD MAY-JUN PY 2005 VL 117 IS 5-6 BP 795 EP 807 DI 10.1130/B25590.1 PG 13 WC Geosciences, Multidisciplinary SC Geology GA 922GK UT WOS:000228824500015 ER PT J AU Covey, C Caldeira, K Hoffert, M MacCracken, M Schneider, SH Wigley, T AF Covey, C Caldeira, K Hoffert, M MacCracken, M Schneider, SH Wigley, T TI Comment on "Thermal pollution causes global warming", by B. Nordell [Global Planet. Change 38 (2003), 305-312] SO GLOBAL AND PLANETARY CHANGE LA English DT Editorial Material C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NYU, New York, NY USA. Stanford Univ, Stanford, CA 94305 USA. Natl Ctr Atmospher Res, Boulder, CO USA. RP Covey, C (reprint author), Lawrence Livermore Natl Lab, L-103, Livermore, CA 94550 USA. EM coveyl@llnl.gov RI Caldeira, Ken/E-7914-2011 NR 4 TC 1 Z9 1 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8181 J9 GLOBAL PLANET CHANGE JI Glob. Planet. Change PD MAY PY 2005 VL 47 IS 1 BP 72 EP 73 DI 10.1016/j.gloplacha.2005.02.001 PG 2 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA 944ZE UT WOS:000230469000007 ER PT J AU Tsang, CF AF Tsang, CF TI Is current hydrogeologic research addressing long-term predictions? SO GROUND WATER LA English DT Article AB Hydrogeology is a field closely related to the needs of society. Many problems of current national and local interest require predictions of hydrogeological system behavior, and in a number of important cases, the period of prediction is tens to hundreds of thousands of years. It is argued that the demand for such long-term hydrogeological predictions casts a new light on the future needs of hydrogeological research. Key scientific issues are no longer concerned only with simple processes or narrowly focused modeling or testing methods but also with assessment of prediction uncertainties and confidence, couplings among multiple physicochemical processes occurring simultaneously at a site, and the interplay between site characterization and predictive modeling. These considerations also have significant implications for hydrogeological education. With this view, it is asserted that hydrogeological directions and education need to be reexamined and possibly refocused to address specific needs for long-term predictions. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Tsang, CF (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM cftsang@lbl.gov NR 16 TC 10 Z9 10 U1 1 U2 3 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0017-467X J9 GROUND WATER JI Ground Water PD MAY-JUN PY 2005 VL 43 IS 3 BP 296 EP 300 DI 10.1111/j.1745-6584.2005.0023.x PG 5 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA 925KG UT WOS:000229051400004 PM 15882321 ER PT J AU Potter, CA AF Potter, CA TI Comments about Potter's review of internal dosimetry - Response to Lloyd et al. SO HEALTH PHYSICS LA English DT Letter C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Potter, CA (reprint author), Sandia Natl Labs, POB 5800,MS0651, Albuquerque, NM 87185 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD MAY PY 2005 VL 88 IS 5 BP 498 EP 498 DI 10.1097/00004032-200505000-00010 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 917LQ UT WOS:000228463800010 ER PT J AU Hill, CD AF Hill, CD TI An algorithm for pre- and post-irradiation fade in the thermo 8802 LiF : Mg,Ti Thermoluminescent dosimeter SO HEALTH PHYSICS LA English DT Article DE operational topic; dosimetry, thermoluminescent; dosimetry, external; quality assurance AB The diminished response of thermoluminescent phosphors over time is a well-documented challenge to thermoluminescent dosimetry. Wide ranges in fading rates for various phosphor types have been reported, making it necessary for many external dosimetry programs to perform individual studies on thermoluminescent fade, Sandia National Laboratories currently uses the Thermo 8802 LiF:Mg, Ti thermoluminescent dosimeter (TLD) in its personnel external dosimetry program. Doses received in the field are calculated by applying a fade algorithm published by the manufacturer to TLD readings. Since the algorithm was established by characterizing the diminished response of a TLD similar to the 8802, Sandia chose to model its fade study after the analysis done by Thermo. As a result, the parameters of each experiment were comparable, and data from the two studies were compared to determine whether or not the current algorithm should be modified specifically for use at Sandia, Cards were irradiated using an internal Sr-90/Y-90 source, and pre- and postirradiation fading rates were monitored over a period of 18 wk. While significant fading was demonstrated, results closely matched those found in the original Thermo study. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. EM cdhill04@yahoo.com NR 6 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD MAY PY 2005 VL 88 IS 5 SU S BP S73 EP S78 DI 10.1097/01.HP.0000156063.05141.a8 PG 6 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 918FQ UT WOS:000228528100005 PM 15824586 ER PT J AU Kamboj, S Cheng, JJ Yu, C AF Kamboj, S Cheng, JJ Yu, C TI Deterministic vs. probabilistic analyses to identify sensitive parameters in dose assessment using RESRAD SO HEALTH PHYSICS LA English DT Article AB The dose assessments for sites containing residual radioactivity usually involve tire use of computer models that employ input parameters describing the physical conditions of the contaminated and surrounding media and the living and consumption patterns of the receptors in analyzing potential doses to the receptors. The precision of the dose results depends on the precision of the input parameter values. The identification of sensitive parameters that have great influence on the dose results would help set priorities in research and information gathering for parameter values so that a more precise dose assessment can be conducted. Two methods of identifying site-specific sensitive parameters, deterministic and probabilistic, were compared by applying them to the RESRAD computer code for analyzing radiation exposure for a residential former scenario. The deterministic method has difficulty in evaluating the effect of simultaneous changes in a large number or input parameters on the model output results. The probabilistic method easily identified the most sensitive parameters, but the sensitivity measure of other parameters was obscured. The choice of sensitivity analysis method would depend on the availability of site-specific data. Generally speaking, the deterministic method would identify the same set of sensitive parameters as the probabilistic method when 1) the baseline values used in the deterministic method were selected near the mean or median value of each parameter and 2) the selected range of parameter values used in the deterministic method was wide enough to cover the 5th to 95th percentile values from the distribution of that parameter. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Yu, C (reprint author), Argonne Natl Lab, Bldg 900,9700 S Cass Ave, Argonne, IL 60439 USA. EM skamboj@anl.gov NR 7 TC 1 Z9 1 U1 2 U2 6 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD MAY PY 2005 VL 88 IS 5 SU S BP S104 EP S109 DI 10.1097/01.HP.0000156058.46817.2c PG 6 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 918FQ UT WOS:000228528100010 PM 15824576 ER PT J AU Sullivan, PT Pizzulli, M AF Sullivan, PT Pizzulli, M TI Health physics challenges involved with opening a "Seventeen-Inch" concrete waste vault SO HEALTH PHYSICS LA English DT Article DE operational topic; waste management; plutonium; dose, low AB This paper describes the various activities involved with opening a sealed legacy "Seventeen-inch" concrete vault and the health physics challenges and solutions employed. As part of a legacy waste stream that was removed front the former Hazardous Waste Management Facility at Brookhaven National Laboratory, the 'Seventeen-inch" concrete vault labeled 1-95 was moved to the new Waste Management Facility for ultimate disposal. Because the vault contained Pu-239 foils with a total activity in excess of the transuranic waste limits, the foils needed to be removed and repackaged for disposal. Conventional diamond wire saws could not be used because of facility constraints, so this project relied mainly on manual techniques. The planning and engineering controls put in place enabled personnel to open the vault and remove the waste while keeping dose as low as reasonably achievable. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. PW Grosser Inc, Bohemia, NY 11716 USA. RP Sullivan, PT (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA. EM sulli@bnl.gov NR 1 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD MAY PY 2005 VL 88 IS 5 SU S BP S97 EP S103 DI 10.1097/01.HP.0000156059.17528.56 PG 7 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 918FQ UT WOS:000228528100009 PM 15824590 ER PT J AU Tian, J Brown, TA Hu, FS AF Tian, J Brown, TA Hu, FS TI Comparison of varve and C-14 chronologies from Steel Lake, Minnesota, USA SO HOLOCENE LA English DT Article DE varve chronology; C-14 chronology; laminated sediment; counting error; varve-count adjustment; palaeoclimate; late Holocene; Steel Lake; Minnesota ID ANNUALLY LAMINATED SEDIMENT; AMS RADIOCARBON; CLIMATE; RECORD; HOLOCENE; BALDEGGERSEE; SWITZERLAND; DISSOLUTION; CALIBRATION; HOLZMAAR AB Annually laminated sediments (varves) offer an effective means of acquiring high-quality palaeoenvironmental records. However, the strength of a varve chronology can be compromised by a number of factors, such as missing varves, ambiguous laminations and human counting error. We assess the quality of a varve chronology for the last three millennia from Steel Lake, Minnesota. through comparisons with nine AMS C-14 dates on terrestrial plant macrofossils from the same core. These comparisons revealed an overall 8.4% discrepancy, primarily because of missing/uncountable varves within two stratigraphic intervals characterized by low carbonate concentrations and obscure laminations. Application of appropriate correction factors to these two intervals results in excellent agreement between the varve and C-14 chronologies. These results, together with other varve studies, demonstrate that an independent age-determination method, such as C-14 dating, is usually necessary to verify, and potentially correct, varve chronologies. C1 Univ Illinois, Dept Geol, Urbana, IL 61801 USA. Lawrence Livermore Natl Lab, CAMS, Livermore, CA 94551 USA. Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA. Univ Illinois, Program Ecol & Evolutionary Biol, Urbana, IL 61801 USA. RP Tian, J (reprint author), Univ Illinois, Dept Geol, Urbana, IL 61801 USA. EM jiantian@uiuc.edu; fshu@life.uiuc.edu NR 38 TC 23 Z9 23 U1 1 U2 5 PU ARNOLD, HODDER HEADLINE PLC PI LONDON PA 338 EUSTON ROAD, LONDON NW1 3BH, ENGLAND SN 0959-6836 J9 HOLOCENE JI Holocene PD MAY PY 2005 VL 15 IS 4 BP 510 EP 517 DI 10.1191/0959683605hl828rp PG 8 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA 933EW UT WOS:000229612700004 ER PT J AU Paller, MH AF Paller, MH TI The influence of biomanipulation on fish community development in a southeastern United States cooling reservoir SO HYDROBIOLOGIA LA English DT Article DE fish community; reservoir; community development; temporal change; biomanipulation; management ID IMPOUNDMENT AB L Lake, a reactor cooling reservoir in South Carolina, USA was managed after filling to promote the development of healthy ecological communities similar to those in mature regional cooling reservoirs. Two types of biomanipulation were undertaken to achieve this goal, the introduction of typical southeastern US reservoir fishes (bluegill and largemouth bass) and artificial planting of native aquatic macrophytes. Fish assemblages were monitored by electrofishing from reservoir filling in 1986 until 1998. Multivariate analysis divided the fish samples into five sequential periods resulting from species replacements and additions. Small species that colonized L Lake from a feeder stream predominated in the first period but were mostly eliminated, as bluegill, largemouth bass, and other lentic species increased in the second period. A rapid increase in threadfin shad abundance characterized the third period, and small littoral zone and phytophilous fishes increased during the fourth and fifth periods coincident with the proliferation of aquatic macrophytes. Analysis of Bray-Curtis similarities and the species accumulation rate indicated that the rate of fish community change decreased with time and that fish community structure changed little during the last several years of the study. By the end of the study, community structure was similar to that in a nearby cooling reservoir that supported diverse and resilient biota. Biomanipulation contributed to the rapid establishment of lentic species and later increases in small littoral and phytophilous species suggesting that biomanipulation may be useful in accelerating fish community development in new cooling reservoirs. C1 Savannah River Technol Ctr, Environm Anal Sect, Aiken, SC 29808 USA. RP Paller, MH (reprint author), Savannah River Technol Ctr, Environm Anal Sect, Savannah River Site, Aiken, SC 29808 USA. EM michael.paller@srs.gov NR 44 TC 8 Z9 9 U1 0 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0018-8158 EI 1573-5117 J9 HYDROBIOLOGIA JI Hydrobiologia PD MAY 1 PY 2005 VL 539 BP 69 EP 81 DI 10.1007/s10750-004-3248-1 PG 13 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA 952TY UT WOS:000231029600007 ER PT J AU Jakosky, BM Mellon, MT Varnes, ES Feldman, WC Boynton, WV Haberle, RM AF Jakosky, BM Mellon, MT Varnes, ES Feldman, WC Boynton, WV Haberle, RM TI Mars low-latitude neutron distribution: Possible remnant near-surface water ice and a mechanism for its recent emplacement SO ICARUS LA English DT Article DE Mars; neutrons; Mars odyssey; water ice; Mars climate ID THERMAL EMISSION SPECTROMETER; SOUTH POLAR-CAP; GROUND ICE; SEASONAL RESERVOIRS; MARTIAN CLIMATE; CYCLE; VAPOR; REGOLITH; BEHAVIOR; CIRCULATION AB surface hydrogen, generally interpreted as resulting from water, in the equatorial and mid-latitudes. Water abundances as great as 10% by mass are inferred. Although such high abundances could be present as adsorbed water in clays or water of hydration of magnesium salts, other measurements suggest that this is not likely. The spatial pattern of where the water is located is not consistent with a dependence on composition, topography, present-day atmospheric water abundance, latitude, or thermophysical properties. The zonal distribution of water shows two maxima and two minima, which is very reminiscent of a distribution that is related to an atmospheric phenomenon. We suggest that the high water abundances could be due to transient ground ice that is present in the top meter of the surface. Ice would be stable at tens-of-centimeters depth at these latitudes if the atmospheric water abundance were more than about several times the present value, much as ice is stable poleward of about +/- 60 degrees latitude for current water abundances. Higher atmospheric water abundances could have resulted relatively recently, even with the present orbital elements, if the south-polar cap had lost its annual covering of CO2 ice; this would have exposed an underlying water-ice cap that could supply water to the atmosphere during Southern summer. If this hypothesis is correct, then (i) the low-latitude water ice is unstable today and is in the process of sublimating and diffusing back into the atmosphere, and (ii) the current configuration of perennial CO2 ice being present on the south cap but not on the north cap might not be representative of the present epoch over the last, say, ten thousand years. (c) 2004 Elsevier Inc. All rights reserved. C1 Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA. Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA. NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. RP Jakosky, BM (reprint author), Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA. EM bruce.jakosky@lasp.colorado.edu RI Mellon, Michael/C-3456-2016 NR 49 TC 51 Z9 52 U1 1 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0019-1035 J9 ICARUS JI Icarus PD MAY PY 2005 VL 175 IS 1 BP 58 EP 67 DI 10.1016/j.icarus.2004.11.014 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 921AA UT WOS:000228735400006 ER PT J AU Hammel, HB de Pater, I Gibbard, SG Lockwood, GW Rages, K AF Hammel, HB de Pater, I Gibbard, SG Lockwood, GW Rages, K TI New cloud activity on Uranus in 2004: First detection of a southern feature at 2.2 mu m SO ICARUS LA English DT Article DE Uranus; atmosphere ID URANIAN SYSTEM; RINGS AB On 4 July 2004 UT, we detected one of Uranus' southern hemispheric cloud features at K' (2.12 mu m) this is the first such detection in half a decade of adaptive optics imaging of Uranus at the Keck 10-m telescope. When we observed again on 8 July UT the feature's bright core had faded. By 9 July UT it was not seen at K' and barely detectable at H. The detection and subsequent disappearance of the feature indicates rapid dynamical processes in the localized vertical aerosol Structure. (c) 2004 Elsevier Inc. All rights reserved. C1 Space Sci Inst, Boulder, CO 80303 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Lowell Observ, Flagstaff, AZ 86001 USA. SETI Inst, Mountain View, CA 94043 USA. RP Hammel, HB (reprint author), Space Sci Inst, Boulder, CO 80303 USA. EM hbh@alum.mit.edu NR 15 TC 15 Z9 15 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0019-1035 J9 ICARUS JI Icarus PD MAY PY 2005 VL 175 IS 1 BP 284 EP 288 DI 10.1016/j.icarus.2004.11.016 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 921AA UT WOS:000228735400023 ER PT J AU Love, AL Pang, A Kao, DL AF Love, AL Pang, A Kao, DL TI Visualizing spatial multivalue data SO IEEE COMPUTER GRAPHICS AND APPLICATIONS LA English DT Article C1 Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. NASA, Ames Res Ctr, NASA Adv Supercomp Div, Ames, IA USA. EM alove@adobe.com; pang@cse..ucsc.edu; David.L.Kao@nasa.gov NR 13 TC 28 Z9 30 U1 0 U2 3 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 0272-1716 EI 1558-1756 J9 IEEE COMPUT GRAPH JI IEEE Comput. Graph. Appl. PD MAY-JUN PY 2005 VL 25 IS 3 BP 69 EP 79 DI 10.1109/MCG.2005.71 PG 11 WC Computer Science, Software Engineering SC Computer Science GA 922CN UT WOS:000228813600011 PM 15943090 ER PT J AU Havre, SL Singhal, M Payne, DA Lipton, MSW Webb-Robertson, BJM AF Havre, SL Singhal, M Payne, DA Lipton, MSW Webb-Robertson, BJM TI Enabling proteomics discovery through visual analysis SO IEEE ENGINEERING IN MEDICINE AND BIOLOGY MAGAZINE LA English DT Article ID DATABASE C1 Pacific NW Natl Lab, Sci Comp & Eng Grp, Richland, WA 99352 USA. Pacific NW Natl Lab, Visual Analyt Grp, Richland, WA 99352 USA. RP Havre, SL (reprint author), Pacific NW Natl Lab, Sci Comp & Eng Grp, POB 999,K7-90, Richland, WA 99352 USA. EM susan.havre@pnl.gov NR 8 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0739-5175 J9 IEEE ENG MED BIOL JI IEEE Eng. Med. Biol. Mag. PD MAY-JUN PY 2005 VL 24 IS 3 BP 50 EP 57 DI 10.1109/MEMB.2005.1436460 PG 8 WC Engineering, Biomedical; Medical Informatics SC Engineering; Medical Informatics GA 928BS UT WOS:000229246700013 PM 15971841 ER PT J AU Di Giacomo, M AF Di Giacomo, M TI MySQL: Lessons learned on a digitial library SO IEEE SOFTWARE LA English DT Editorial Material C1 Los Alamos Natl Lab, Lib Without Walls Team, Los Alamos, NM USA. RP Di Giacomo, M (reprint author), Los Alamos Natl Lab, Lib Without Walls Team, Los Alamos, NM USA. EM mariella@lanl.gov NR 0 TC 8 Z9 8 U1 0 U2 4 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 0740-7459 J9 IEEE SOFTWARE JI IEEE Softw. PD MAY-JUN PY 2005 VL 22 IS 3 BP 10 EP 13 DI 10.1109/MS.2005.71 PG 4 WC Computer Science, Software Engineering SC Computer Science GA 923QH UT WOS:000228923900005 ER PT J AU Singh, A Scharer, JE Booske, JH Wohlbier, JG AF Singh, A Scharer, JE Booske, JH Wohlbier, JG TI Second- and third-order signal predistortion for nonlinear distortion suppression in a TWT SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article; Proceedings Paper CT 5th IEEE International Vacuum Electronics Conference (IVEC) CY APR 27-29, 2004 CL Monterey, CA SP IEEE DE distortion suppression; harmonic injection; predistortion; signal injection; traveling wave tubes (TWTs) ID TRAVELING-WAVE TUBE; HARMONIC INJECTION; INTERMODULATION; AMPLIFIER; SYSTEMS; HELIX; POWER AB The nonlinearity inherent in the traveling wave tube (TWT) amplifier distorts amplified signals and results in reduced efficiency and bandwidth, limiting its use in communication and electronic countermeasure applications. Signal predistortion is an effective technique for suppressing nonlinear distortion in TWTs that provides high suppression and requires simple circuits for implementation. While conventional predistortion linearizers are based on third-order intermodulation (3IM) injection, this paper proposes using second-order (second-harmonic) signal injection in predistortion circuits. A detailed experimental investigation and comparison of second-order versus third-order signal predistortion is presented. It is observed that both schemes result in suppression of up to 30 dB (55 dBc) for the 3IM distortion products. However, experimental results indicate that second-harmonic signal injection performs better than 3IM in suppressing higher order products. The paper also investigates spatial evolution of the wave spectrum along the TWT axis with and without injection, and sensitivity of the suppression to injected signals amplitude, phase and the fundamental frequency. C1 Univ Wisconsin, Dept Elect Engn, Madison, WI 53706 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Singh, A (reprint author), Univ Wisconsin, Dept Elect Engn, Madison, WI 53706 USA. NR 25 TC 8 Z9 8 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD MAY PY 2005 VL 52 IS 5 BP 709 EP 717 DI 10.1109/TED.2005.845794 PG 9 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 919DY UT WOS:000228599700014 ER PT J AU Wohlbier, JG Booske, JH AF Wohlbier, JG Booske, JH TI Nonlinear space charge wave theory of distortion in a klystron SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article; Proceedings Paper CT 5th IEEE International Vacuum Electronics Conference (IVEC) CY APR 27-29, 2004 CL Monterey, CA SP IEEE DE amplitude distortion; intermodulation; klystron; linearization; phase distortion ID DIGITAL-COMMUNICATIONS; HARMONIC INJECTION; TUBE; INTERMODULATION; AMPLIFIER; DESIGN; TWT AB We present a new view of nonlinear distortion in a klystron based on an analytically solvable nonlinear Eulerian model. The nonlinear contributions to the analytic solutions for the beam modulations are "nonlinear space charge waves" in the sense that they are produced by the nonlinear mixing of the linear space charge waves. For a single-frequency input, amplitude and phase distortion are shown to be results of "self-intermodulation" at the drive frequency, or mixing of harmonic distortions with the fundamental. The self-intermodulation contributions add out of phase with the linear space charge waves to produce gain compression and phase distortion. By comparing the results to a conventional large-signal Lagrangian model we find this physical picture is accurate for drive levels up to 1.2 dB of gain compression. For a two-frequency input we predict the third-order intermodulation distortion generation and suppression with the nonlinear space charge wave theory. C1 Los Alamos Natl Lab, Continuum Dynam Grp CCS2, Los Alamos, NM 87545 USA. Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. RP Wohlbier, JG (reprint author), Los Alamos Natl Lab, Continuum Dynam Grp CCS2, POB 1663, Los Alamos, NM 87545 USA. NR 24 TC 3 Z9 3 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD MAY PY 2005 VL 52 IS 5 BP 734 EP 741 DI 10.1109/TED.2005.845865 PG 8 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 919DY UT WOS:000228599700017 ER PT J AU Petillo, JJ Nelson, EM DeFord, JF Dionne, NJ Levush, B AF Petillo, JJ Nelson, EM DeFord, JF Dionne, NJ Levush, B TI Recent developments to the MICHELLE 2-D/3-D electron gun and collector modeling code SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article; Proceedings Paper CT 5th IEEE International Vacuum Electronics Conference (IVEC) CY APR 27-29, 2004 CL Monterey, CA SP IEEE DE beam formation; charge exchange; computer-aided design (CAD); electron gun; ion plasma; ion thrusters; MICHELLE; multistage depressed collector; multibeam gun; object-oriented design; Voyager ID EMISSION; DESIGN AB Recent developments to the MICHELLE electron gun and collector design tool are reported in this paper. The MICHELLE code is a new finite-element (FE) two-dimensional and three-dimensional electrostatic particle-in-cell code that has been designed to address the recent beam optics modeling and simulation requirements for vacuum electron devices, ion sources, and charged-particle transport. Problem classes specifically targeted include depressed collectors, gridded-guns, multibeam guns, sheet-beam guns, and ion thrusters. The focus of the development program is to combine modern FE techniques with improved physics models. The code employs a conformal mesh, including both structured and unstructured mesh architectures for meshing flexibility, along with a new method for accurate, efficient particle tracking. New particle emission models for thermionic beam representation are included that support primary emission, with an advanced secondary emission model. This paper reports on three significant advances to MICHELLE over the past year; hybrid structured/unstructured mesh support, a time-domain electrostatic algorithm, and an ion plasma model with charge exchange. C1 Sci Applicat Int Corp, Burlington, MA 01803 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Simulat Technol & Appl Res Inc, Milwaukee, WI 53092 USA. Raytheon Co, Sudbury, MA 01776 USA. USN, Res Lab, Vacuum Elect Branch, Washington, DC 20375 USA. RP Petillo, JJ (reprint author), Sci Applicat Int Corp, Burlington, MA 01803 USA. EM jpetillo@bos.saic.com NR 12 TC 82 Z9 87 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD MAY PY 2005 VL 52 IS 5 BP 742 EP 748 DI 10.1109/TED.2005.845800 PG 7 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 919DY UT WOS:000228599700018 ER PT J AU Mattioli, V Westwater, ER Gutman, SI Morris, VR AF Mattioli, V Westwater, ER Gutman, SI Morris, VR TI Forward model studies of water vapor using scanning microwave radiometers, global positioning system, and radiosondes during the cloudiness intercomparison experiment SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article; Proceedings Paper CT 8th Specialist Meeting on Microwave Radiometry and Remote Sensing Applications CY FEB 24-27, 2004 CL Univ Rome La Sapienza, Engn Coll, Rome, ITALY HO Univ Rome La Sapienza, Engn Coll DE Global Positioning System (GPS); microwave propagation; microwave radiometry; radiometric accuracy; water vapor ID ATMOSPHERIC RADIATION; GPS; METEOROLOGY; HUMIDITY; PROGRAM; NETWORK; DESIGN; ERRORS AB Brightness temperatures computed from five absorption models and radiosonde observations were analyzed by comparing them with measurements from three microwave radiometers at 23.8 and 31.4 GHz. Data were obtained during the Cloudiness Inter-Comparison Experiment at the U.S. Department of Energy's Atmospheric Radiation Measurement Program's (ARM) site in North-Central Oklahoma in 2003. The radiometers were calibrated using two procedures, the so-called instantaneous "tipcal" method and an automatic self-calibration algorithm. Measurements from the radiometers were in agreement, with less than a 0.4-K rms difference during clear skies, when the instantaneous method was applied. Brightness temperatures from the radiometer and the radiosonde showed a bias difference of less than 0.69 K when the most recent absorption models were considered. Precipitable water vapor (PWV) computed from the radiometers were also compared to the PWV derived from a Global Positioning System station that operates at the ARM site. The instruments agree to within 0.1 cm in PWV retrieval. C1 Univ Perugia, Dept Elect & Informat Engn, I-06125 Perugia, Italy. Univ Colorado, NOAA, Cooperat Inst Res Environm Sci, Environm Technol Lab, Boulder, CO 80305 USA. US DOE, Pacific NW Natl Lab, Richland, WA 99352 USA. NOAA, Forecast Syst Lab, GPS, Met Observ Syst Branch, Boulder, CO 80305 USA. RP Mattioli, V (reprint author), Univ Perugia, Dept Elect & Informat Engn, I-06125 Perugia, Italy. EM mattioli@diei.unipg.it; Ed.R.Westwater@noaa.gov; Seth.I.Gutman@noaa.gov; victor.morris@pnl.gov NR 34 TC 23 Z9 24 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD MAY PY 2005 VL 43 IS 5 BP 1012 EP 1021 DI 10.1109/TGRS.2004.839926 PG 10 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA 920ES UT WOS:000228672800010 ER PT J AU Liljegren, JC Boukabara, SA Cady-Pereira, K Clough, SA AF Liljegren, JC Boukabara, SA Cady-Pereira, K Clough, SA TI The effect of the half-width of the 22-GHz water vapor line on retrievals of temperature and water vapor profiles with a 12-channel microwave radiometer SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article; Proceedings Paper CT 8th Specialist Meeting on Microwave Radiometry and Remote Sensing Applications CY FEB 24-27, 2004 CL Univ Rome La Sapienza, Engn Coll, Rome, ITALY HO Univ Rome La Sapienza, Engn Coll DE microwave remote sensing; spectroscopy; thermodynamic profile retrieval; water vapor absorption ID H2O AB We show that observed biases in retrievals of temperature and water vapor profiles from a 12-channel microwave radiometer arise from systematic differences between the observed and model-calculated brightness temperatures at five measurement frequencies between 22 and 30 GHz. Replacing the value for the air-broadened half-width of the 22-GHz water vapor line used in the Rosenkranz absorption model with the 5% smaller half-width from the HITRAN compilation largely eliminated the systematic differences in brightness temperatures. An a priori statistical retrieval based on the revised model demonstrated significant improvements in the accuracy and vertical resolution of the retrieved temperature and water vapor profiles. Additional improvements were demonstrated by combining the MWRP retrievals with those from the GOES-8 sounder and by incorporating brightness temperature measurements at off-zenith angles in the retrievals. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Atmospher & Environm Res Inc, Lexington, MA 02421 USA. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jcliljegren@anl.gov RI Boukabara, Sid Ahmed/F-5577-2010 OI Boukabara, Sid Ahmed/0000-0002-1857-3806 NR 20 TC 74 Z9 74 U1 0 U2 8 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0196-2892 EI 1558-0644 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD MAY PY 2005 VL 43 IS 5 BP 1102 EP 1108 DI 10.1109/TGRS.2004.839593 PG 7 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA 920ES UT WOS:000228672800020 ER PT J AU Su, GH AF Su, GH TI Multilevel dc-link inverter SO IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS LA English DT Article; Proceedings Paper CT 39th Annual Meeting of the Industry-Applications-Society CY OCT 03-07, 2004 CL Seattle, WA SP IEEE Ind Applicat Soc DE cascaded half bridge; diode clamped; flying capacitor; multilevel dc link; multilevel inverter; reduced part count AB This paper presents a new class of multilevel inverters based on a multilevel dc link (MLDCL) and a bridge inverter to reduce the number of switches, clamping diodes, or capacitors. An MLDCL can be a diode-clamped phase leg, a flying-capacitor phase leg, or cascaded half-bridge cells with each cell having its own de source. A multilevel voltage-source inverter can be formed by connecting one of the MLDCLs with a single-phase bridge inverter. The MLDCL provides a dc voltage with the shape of a staircase approximating the rectified shape of a commanded sinusoidal wave, with or without pulsewidth modulation, to the bridge inverter, which in turn alternates the polarity to produce an ac voltage. Compared with the cascaded H-bridge, diode-clamped, and flying-capacitor multilevel inverters, the MLDCL inverters can significantly reduce the switch count as well as the number of gate drivers as the number of voltage levels increases. For a given number of voltage levels m, the required number of active switches is 2 x (m - 1) for the existing multilevel inverters but is m + 3 for the MLDCL inverters. Simulation and experimental results are included to verify the operating principles of the MLDCL inverters. C1 Oak Ridge Natl Lab, Power Elect & Elect Machinery Res Ctr, Oak Ridge, TN 37831 USA. RP Su, GH (reprint author), Oak Ridge Natl Lab, Power Elect & Elect Machinery Res Ctr, Oak Ridge, TN 37831 USA. EM sugj@oml.gov NR 16 TC 83 Z9 83 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0093-9994 J9 IEEE T IND APPL JI IEEE Trans. Ind. Appl. PD MAY-JUN PY 2005 VL 41 IS 3 BP 848 EP 854 DI 10.1109/TIA.2005.847306 PG 7 WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic SC Engineering GA 934CQ UT WOS:000229684900024 ER PT J AU Lu, N Chassin, DP Widergren, SE AF Lu, N Chassin, DP Widergren, SE TI Modeling uncertainties in aggregated thermostatically controlled loads using a state queueing model SO IEEE TRANSACTIONS ON POWER SYSTEMS LA English DT Article DE demand-side management program; load model; load synthesis; state queueing model; thermostatically controlled appliance; water heater load AB To study the impacts of price responsive demand on the electric power system requires better load models. This paper discusses the modeling of uncertainties in aggregated thermostatically controlled loads using a state queueing (SQ) model. The cycling times of thermostatically controlled appliances (TCAs) vary with the TCA types and sizes, as well as the ambient temperatures. The random consumption of consumers, which shortens or prolongs a specific TCA cycling period, introduces another degree of uncertainty. By modifying the state transition matrix, these random factors can be taken into account in a discrete SQ model. The impacts of considering load diversity in the SQ model while simulating TCA setpoint response are also studied. C1 Pacific NW Natl Lab, Energy Sci & Technol Div, Richland, WA 99352 USA. RP Lu, N (reprint author), Pacific NW Natl Lab, Energy Sci & Technol Div, Richland, WA 99352 USA. EM ning.lu@pnl.gov; david.chassin@pnl.gov; steve.widergren@pnl.gov NR 14 TC 59 Z9 69 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0885-8950 J9 IEEE T POWER SYST JI IEEE Trans. Power Syst. PD MAY PY 2005 VL 20 IS 2 BP 725 EP 733 DI 10.1109/TPWRS.2005.846072 PG 9 WC Engineering, Electrical & Electronic SC Engineering GA 921QF UT WOS:000228778800025 ER PT J AU Chassin, DP Huang, Z Donnelly, MK Hassler, C Ramirez, E Ray, C AF Chassin, DP Huang, Z Donnelly, MK Hassler, C Ramirez, E Ray, C TI Estimation of WECC system inertia using observed frequency transients SO IEEE TRANSACTIONS ON POWER SYSTEMS LA English DT Letter DE frequency excursion; grid-friendly appliances; system inertia property; Western Electricity Coordination Council (WECC) AB Computer models being developed to understand the interaction between demand-response technology, power system deregulation, and market transformation depend in part on understanding the relationship between system frequency and load control. Frequency, load, and plant outage events data collected over the last several years have permitted analysis to determine the Western Electricity Coordination Council system's inertia during each event. This data were used to evaluate the relationship of system inertia to total load, which is used to model system response to load curtailment programs in next-generation power system simulations. C1 Pacific NW Nal Lab, Richland, WA 99352 USA. US DOE, Inst Sci & Technol, Community Coll, Off Sci, Washington, DC 20585 USA. RP Chassin, DP (reprint author), Pacific NW Nal Lab, Richland, WA 99352 USA. NR 3 TC 22 Z9 24 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0885-8950 J9 IEEE T POWER SYST JI IEEE Trans. Power Syst. PD MAY PY 2005 VL 20 IS 2 BP 1190 EP 1192 DI 10.1109/TPWRS.2005.846155 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA 921QF UT WOS:000228778800084 ER PT J AU Hochel, RC Sigg, RA DiPrete, DP Ekechukwu, AA AF Hochel, RC Sigg, RA DiPrete, DP Ekechukwu, AA TI A new approach to radionuclide analysis in groundwaters SO INSTRUMENTATION SCIENCE & TECHNOLOGY LA English DT Article DE radionuclide analysis; groundwaters; liquid scintillation spectral analysis (LSSA) AB A method using liquid scintillation spectral analysis (LSSA) for analyzing mixtures of radionuclides in groundwater samples, which is fast, simple, and inexpensive, was developed and bench-tested. Samples can be measured in a field laboratory with a new commercial portable liquid scintillation instrument that provides advanced analysis, display, and computational features previously found only in large expensive laboratory models. Results can be available within hours from the time samples are collected. The analysis provides a good measure of total sample activity and a spectral index value that may detect changes in radionuclide distributions from previous analyses when counting statistic are adequate. If a sample shows no change, further analytical costs for it may be avoided. A method that rapidly and quantitatively concentrates very low levels of activity from liter-size samples in minutes was also tested. With some modest improvements in this step, this work offers a completely new methodology and approach to groundwater remediation, which can dramatically reduce analytical costs and speed monitored cleanup and closure in many types of radiological work programs. C1 Savannah River Natl Lab, Aiken, SC 29808 USA. RP Hochel, RC (reprint author), Savannah River Natl Lab, Bldg 735-7A, Aiken, SC 29808 USA. EM robert.hochel@srs.gov NR 5 TC 0 Z9 0 U1 0 U2 1 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1073-9149 J9 INSTRUM SCI TECHNOL JI Instrum. Sci. Technol. PD MAY-JUN PY 2005 VL 33 IS 3 BP 309 EP 328 DI 10.1081/CI-200056135 PG 20 WC Chemistry, Analytical; Instruments & Instrumentation SC Chemistry; Instruments & Instrumentation GA 933NN UT WOS:000229640300006 ER PT J AU Zhang, Z Russell, AM Biner, SB Gschneidner, KA Lo, CCH AF Zhang, Z Russell, AM Biner, SB Gschneidner, KA Lo, CCH TI Fracture toughness of polycrystalline YCu, DyCu, and YAg SO INTERMETALLICS LA English DT Article DE rare-earth intermetallics; fracture toughness; mechanical properties at ambient temperature; environmental embrittlement; brittleness and ductility ID INTERMETALLIC COMPOUNDS; ENVIRONMENT; DUCTILITY; ALLOYS AB Room temperature fracture toughness was measured for YCu, DyCu, and YAg. Standard tensile tests indicated that YCu was the least ductile of these three intermetallics (11% elongation at failure); DyCu had an intermediate ductility (16% elongation at failure); while YAg was the most ductile (20% elongation at failure). The K-IC value was determined directly for YCu using ASTM test method E 399-90; J(IC) values were measured using ASTM test method E 813-89 for DyCu and YAg, and these JIC values were converted to K-IC values. The K-IC values were found to be 12.0 MPa m for YCu, 25.5 MPa root m for DyCu, and 19.1 MPa m for YAg. These values are relatively high for polycrystalline, fully ordered, stoichiometric intermetallic compounds tested in room air of normal humidity. Factors that may contribute to the high fracture toughness of these materials are discussed. (c) 2004 Elsevier Ltd. All rights reserved. C1 Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. Iowa State Univ, Ctr Nondestruct Evaluat, Ames, IA 50011 USA. RP Russell, AM (reprint author), Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. EM russell@iastate.edu OI Russell, Alan/0000-0001-5264-0104 NR 24 TC 51 Z9 55 U1 0 U2 8 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PD MAY PY 2005 VL 13 IS 5 BP 559 EP 564 DI 10.1016/j.intermet.2004.09.008 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 907ER UT WOS:000227698800014 ER PT J AU Krtolica, A AF Krtolica, A TI Stem cell: balancing aging and cancer SO INTERNATIONAL JOURNAL OF BIOCHEMISTRY & CELL BIOLOGY LA English DT Article DE embryonic stem (ES) cells; adult stem cells; aging; replicative senescence; cancer ID SERIAL TRANSPLANTATION; TELOMERASE ACTIVITY; HUMAN BLASTOCYSTS; MARROW CELLS; BONE-MARROW; HUMAN BRAIN; CULTURE; DIFFERENTIATION; NEURONS; SENESCENCE AB Stem cells are defined by their self-renewing capacity and the ability to differentiate into one or more cell types. Stem cells can be divided. depending on their origin, into embryonic or adult. Embryonic stem cells derive from early stage embryos and can give rise to cells from all three germ layers. Adult stem cells, first identified in hematopoietic tissue, reside in a variety of adult tissues. Under normal physiologic conditions, adult stem cells are capable of differentiating into the limited cell types that comprise the particular tissue or organ. Adult stem cells are responsible for tissue renewal and exhaustion of their replicative capacity may contribute to tissue aging. Loss of unlimited proliferative capacity in some of the adult stem cells and/or their progenitors may have involved the evolutionary trade-off: senescence prevents cancer but may promote aging. Embryonic stem cells exhibit unlimited self-renewal capacity due to the expression of telomerase. Although they possess some cancer cell characteristics, embryonic stem cells exhibit a remarkable resistance to genomic instability and malignant transformation. Understanding the tumor suppressive mechanisms employed by embryonic stem cells may contribute to the development of novel cancer treatments and safe cell-based therapies for age-related diseases. (c) 2004 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif San Francisco, San Francisco, CA 94143 USA. RP Krtolica, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,MS 84-171, Berkeley, CA 94720 USA. EM akrtolica@lbl.gov NR 41 TC 33 Z9 37 U1 0 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1357-2725 J9 INT J BIOCHEM CELL B JI Int. J. Biochem. Cell Biol. PD MAY PY 2005 VL 37 IS 5 BP 935 EP 941 DI 10.1016/j.biocel.2004.10.007 PG 7 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 909PP UT WOS:000227872400006 PM 15743668 ER PT J AU Rodier, F Kim, SH Nijjar, T Yaswen, P Campisi, J AF Rodier, F Kim, SH Nijjar, T Yaswen, P Campisi, J TI Cancer and aging: the importance of telomeres in genome maintenance SO INTERNATIONAL JOURNAL OF BIOCHEMISTRY & CELL BIOLOGY LA English DT Review DE apoptosis; cellular senescence; DNA damage; genomic instability; tumor suppressor ID WERNER-SYNDROME PROTEIN; DOUBLE-STRAND BREAKS; CELLULAR SENESCENCE; HUMAN-CELLS; POLY(ADP-RIBOSE) POLYMERASE; REPLICATIVE SENESCENCE; DNA-REPAIR; IN-VITRO; HISTONE METHYLTRANSFERASES; MAMMALIAN TELOMERES AB Telomeres are the specialized DNA-protein structures that cap the ends of linear chromosomes, thereby protecting them from degradation and fusion by cellular DNA repair processes. In vertebrate cells, telomeres consist of several kilobase pairs of DNA having the sequence TTAGGG, a few hundred base pairs of single-stranded DNA at the 3' end of the telomeric DNA tract, and a host of proteins that organize the telomeric double and single-stranded DNA into a protective structure, Functional telomeres are essential for maintaining the integrity and stability of genomes. When combined with loss of cell cycle checkpoint controls, telomere dysfunction can lead to genomic instability, a common cause and hallmark of cancer. Consequently, normal mammalian cells respond to dysfunctional telomeres by undergoing apoptosis (programmed cell death) or cellular senescence (permanent cell cycle arrest), two cellular tumor suppressor mechanisms. These tumor suppressor mechanisms are potent suppressors of cancer, but recent evidence suggests that they can antagonistically also contribute to aging phenotypes. Here, we review what is known about the structure and function of telomeres in mammalian cells, particularly human cells, and how telomere dysfunction may arise and contribute to cancer and aging phenotypes. (c) 2004 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Buck Inst Age Res, Novato, CA 94545 USA. RP Campisi, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM jcampisi@lbl.gov NR 126 TC 78 Z9 82 U1 2 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1357-2725 J9 INT J BIOCHEM CELL B JI Int. J. Biochem. Cell Biol. PD MAY PY 2005 VL 37 IS 5 BP 977 EP 990 DI 10.1016/j.biocel.2004.10.012 PG 14 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 909PP UT WOS:000227872400010 PM 15743672 ER PT J AU Kim, YH Kim, SJ Kim, JJ Noh, SW Suh, KY Rempe, JL Cheung, FB Kim, SB AF Kim, YH Kim, SJ Kim, JJ Noh, SW Suh, KY Rempe, JL Cheung, FB Kim, SB TI Visualization of boiling phenomena in inclined rectangular gap SO INTERNATIONAL JOURNAL OF MULTIPHASE FLOW LA English DT Article DE critical heat flux; gap size effect; surface orientation effect; transition angle; interfacial instability; rectangular gap ID CRITICAL HEAT-FLUX; VESSEL CORE CATCHER; HIGH-POWER REACTORS; SURFACE ORIENTATION; NATURAL-CONVECTION; SEVERE ACCIDENT; VERTICAL SURFACES; LOWER PLENA; POOL; MODEL AB An experimental study was performed to investigate the pool boiling critical heat flux (CHF) in one-dimensional inclined rectangular channels by changing the orientation of a copper test heater assembly. In a pool of saturated water under the atmospheric pressure, the test parameters included the gap sizes of 1, 2, 5, and 10 mm, and the surface orientation angles from the downward-facing position (180) to the vertical position (90). Tests were conducted on the basis of the visualization of boiling phenomena in the narrowly confined channel and open periphery utilizing a high-speed digital camera. To prevent the heat loss from the water pool and copper test heater, a state-of-the-art vacuum pumping technique was introduced. It was observed that the CHF generally decreased as the surface inclination angle increased and as the gap size decreased. In the downward-facing position (180), however, the vapor movement was enhanced by the gap structure, which produced the opposing result; that is, the CHF increased as the gap size decreased. Phenomenological characteristics regarding the interfacial instability of vapor layer were addressed in terms of visualization approaching the CHF. It was found that there exists a transition angle, around which the CHF changes with a rapid slope. (c) 2005 Elsevier Ltd. All rights reserved. C1 Seoul Natl Univ, Dept Nucl Engn, Seoul 151742, South Korea. Idaho Natl Lab, Idaho Falls, ID 83415 USA. Penn State Univ, University Pk, PA 16802 USA. Korea Atom Energy Res Inst, Taejon 305600, South Korea. RP Seoul Natl Univ, Dept Nucl Engn, San 56-1 Sillim Dong, Seoul 151742, South Korea. EM kysuh@snu.ac.kr OI Rempe, Joy/0000-0001-5527-3549 NR 44 TC 16 Z9 18 U1 2 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0301-9322 EI 1879-3533 J9 INT J MULTIPHAS FLOW JI Int. J. Multiph. Flow PD MAY PY 2005 VL 31 IS 5 BP 618 EP 642 DI 10.1016/j.ijmultiphaseflow.2005.01.002 PG 25 WC Mechanics SC Mechanics GA 928BN UT WOS:000229246200005 ER PT J AU Massoudi, M AF Massoudi, M TI Flow of a mixture of a viscous fluid and a granular solid in an orthogonal rheometer SO INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS LA English DT Article DE orthogonal rheometer; mixtures; granular materials; continuum mechanics ID PARALLEL PLATES; DISTINCT AXES; EQUATIONS; DISKS; SHEAR; PIPE AB In this paper, we study the flow of a linearly viscous fluid and a granular solid, consisting of many particles, situated between two parallel plates rotating about different axes. Flow in orthogonal rheometers has been studied for many viscoelastic fluids so that their rheological properties can be measured. The mixture is modeled using the theory of interacting continua, and constitutive relations for the fluid phase, the granular phase, and the interaction forces are provided. For a very special case, an analytical solution to the equations of motion is also provided. Published by Elsevier Ltd. C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Massoudi, M (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA. EM massoudi@netl.doe.gov NR 38 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7462 J9 INT J NONLINEAR MECH JI Int. J. Non-Linear Mech. PD MAY PY 2005 VL 40 IS 4 BP 507 EP 514 DI 10.1016/j.ijnonlinmec.2004.07.018 PG 8 WC Mechanics SC Mechanics GA 888XK UT WOS:000226407300007 ER PT J AU Zubelewicz, A AF Zubelewicz, A TI A new method to study dilatant deformation mechanisms in ductile materials SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article DE dilatancy; cavitation; ductility; mode I crack; HRR distribution ID CRACK-GROWTH; HARDENING MATERIAL; STRAIN; STRESS AB This paper presents an unconventional method for examining various kinematically admissible and physically acceptable mechanisms of dilatant deformation in ductile materials. In this approach, the constitutive description of material behavior is intentionally left incomplete, i.e., shear stresses and strain rates obey power law, but while material dilatancy is allowed to exist, its form is not predetermined. By omitting the constitutive equation for dilatancy, multiple boundary value solutions can be obtained; these solutions can be further examined and evaluated using an energy minimization criterion. The proposed method allows plausible constitutive assumptions for cavitation to be identified. Using this method, we show that in the vicinity of a mode I crack tip, there are three distinct mechanisms of dilatant deformation, each having strong experimental justification. Published by Elsevier Ltd. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Zubelewicz, A (reprint author), Los Alamos Natl Lab, MST-8,MS G755, Los Alamos, NM 87545 USA. EM alek@lanl.gov NR 17 TC 3 Z9 3 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PD MAY PY 2005 VL 42 IS 9-10 BP 2755 EP 2770 DI 10.1016/j.ijsolstr.2004.09.044 PG 16 WC Mechanics SC Mechanics GA 896QE UT WOS:000226947800015 ER PT J AU Foley, JC AF Foley, JC TI Check the prior art SO JOM LA English DT Letter C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Foley, JC (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-US JI JOM PD MAY PY 2005 VL 57 IS 5 BP 14 EP 15 PG 2 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 925VY UT WOS:000229082600004 ER PT J AU Holm, E McGovney, GN AF Holm, E McGovney, GN TI A memo to the Empire SO JOM LA English DT Letter C1 Sandia Natl Labs, Mat & Proc Modeling Dept, Livermore, CA 94550 USA. RP Holm, E (reprint author), Sandia Natl Labs, Mat & Proc Modeling Dept, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-US JI JOM PD MAY PY 2005 VL 57 IS 5 BP 14 EP 14 PG 1 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 925VY UT WOS:000229082600003 ER PT J AU Ritherdon, J Al-Badairy, H Jones, AR Tatlock, GJ Wright, IG AF Ritherdon, J Al-Badairy, H Jones, AR Tatlock, GJ Wright, IG TI The effects of milling conditions on the subsequent oxidation behaviour of mechanically alloyed Fe3Al-based powders SO JOURNAL DE PHYSIQUE IV LA English DT Article; Proceedings Paper CT 4th Conference of Discreet Mathematics and Algorithmics, Polytechnic Univerisity of Madrid CY MAY 26-28, 2004 CL Beirut, LEBANON DE Fe3Al powder; oxidation; mass gain; mechanical alloying; inhomogeneity AB Mechanically alloyed, Fe3Al-based, oxide dispersion strengthened alloys Form a surface oxide scale during powder processing. This scale becomes entrained in the consolidated alloy, and may have a significant effect on subsequent recrystallisation behaviour. The high oxidation rates found in these alloys are mainly due to the bulk alloy composition. However, batch-to-batch differences in oxidation mass gain occur in powders with ostensibly identical compositions. Batches PMWY2 and PMWY3 were studied and parameters such as alloy composition and homogeneity, powder surface area to volume ratios and scale thickening rates considered. Batch PMWY2 showed 20-90% faster weight gain than PMWY3 and reached the onset of breakaway oxidation approximately twice as quickly. PMWY2 was found to contain aluminium-depleted regions, whereas PMWY3 is much more homogeneous. The surface area to volume ratio for PMWY2 was 44% higher than that of PMWY3, and batch PMWY2 was found to contain extremely fine powder particles. The scale on batch PMWY2 thickened more quickly than that on batch PMWY3, with rates 20-40% higher at different stages in the oxidation. The major contributory factor to the difference in oxidation mass gain between the two alloy batches is scale thickening rate and factors influencing thickening rates are discussed. C1 Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ritherdon, J (reprint author), Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. NR 12 TC 1 Z9 1 U1 0 U2 0 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 1155-4339 J9 J PHYS IV JI J. Phys. IV PD MAY PY 2005 VL 124 BP 9 EP 15 DI 10.1051/jp4:2005124002 PG 7 WC Physics, Multidisciplinary SC Physics GA 938RY UT WOS:000230021800003 ER PT J AU Bergman, W Shinn, J Lochner, R Sawyer, S Milanovich, E Mariella, R AF Bergman, W Shinn, J Lochner, R Sawyer, S Milanovich, E Mariella, R TI High air flow, low pressure drop, bio-aerosol collector using a multi-slit virtual impactor SO JOURNAL OF AEROSOL SCIENCE LA English DT Article DE virtual impactor; aerosol collector; bio-aerosol ID PARTICLES; FINE AB A bio-aerosol collector was developed comprising a low pressure drop, multi-slit virtual impactor, a wetted wall cyclone collector from Research International (RI), and associated plumbing and blowers. The collector is portable, samples air at 1220 L/min, provides 3-8 mL liquid sample, and has 70 W power consumption. The RI collector was selected for this unit following an evaluation of leading commercial aerosol collectors. The compact, multi-slit virtual impactor has an area of 334 cm(2) and a pressure drop of 0.2 kPa at an inlet flow of 1220 L/min. The virtual impactor reported here concentrates the aerosols by a factor of four when the major to minor flow is adjusted to 4:1 ratio, but it has been field operated at a ratio of 8: 1 when sampling at 2300 L/min. A preliminary evaluation of the RI-Lawrence Livermore National Laboratory collector was conducted to verify the unit has low pressure drop and can collect aerosols greater than 2 mu m. A more detailed evaluation is needed to fully characterize the collector. This bio-aerosol collector has been incorporated in autonomous pathogen detection systems. Published by Elsevier Ltd. C1 Lawrence Livermore Natl Lab, Hazards Control Dept, Livermore, CA 94551 USA. RP Bergman, W (reprint author), Lawrence Livermore Natl Lab, Hazards Control Dept, L379,POB 808, Livermore, CA 94551 USA. EM bergman2@llnl.gov NR 21 TC 16 Z9 18 U1 0 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0021-8502 J9 J AEROSOL SCI JI J. Aerosol. Sci. PD MAY-JUN PY 2005 VL 36 IS 5-6 BP 619 EP 638 DI 10.1016/j.jaerosci.2004.12.010 PG 20 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 929LW UT WOS:000229348600006 ER PT J AU Thigpen, L Reardon, PT Leggoe, JW Graham, AL Fitzgerald, M AF Thigpen, L Reardon, PT Leggoe, JW Graham, AL Fitzgerald, M TI A method to determine the effect of microscale heterogeneities on macroscopic web mechanics SO JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME LA English DT Article ID METAL-MATRIX COMPOSITES; DEFORMATION; FAILURE; MICROMECHANICS; SIMULATION; MODEL AB The effect of a spatially heterogeneous density distribution on the development of defects during the transport of nonwoven webs through roller systems has been investigated numerically. A modeling approach has been developed by which the spatial heterogeneity in web mechanical properties can be characterized statistically and recreated for use in finite element simulations. The approach has been applied to model the transport of a carded nonwoven web, consisting of an agglomeration of polypropylene fibers bound together by a regular array of thermal bond points. The web was scanned optically to obtain a gray scale light distribution representing the local material density. Analysis of the local density distribution permitted the generation of "virtual webs" for use in heterogeneous finite element models, in which local mechanical properties were governed by local density. Virtual web response was investigated under two loading configurations; simple tensile testing, and web transport under tension through a three-roller system. The modeling approach provided results that were in good agreement with experimentally observed web mechanics, failure mechanisms, and processing instabilities. Spatial heterogeneity in material properties was found to strongly influence both general web behavior and the tendency for the web to incur manufacturing defects during transport through roller systems. C1 Howard Univ, Dept Engn Mech, Washington, DC 20059 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Texas Tech Univ, Dept Chem Engn, Lubbock, TX 79409 USA. Los Alamos Natl Lab, Engn Sci & Applicat Div, Los Alamos, NM 87545 USA. Univ Colorado, Dept Math, Denver, CO 80217 USA. RP Thigpen, L (reprint author), Howard Univ, Dept Engn Mech, 2300 6th St NW, Washington, DC 20059 USA. EM thigpen@scs.howard.edu; reardon@lanl.gov; Jeremy.Leggoe@ttu.edu; graham@lanl.gov; fitz@carbon.cudenver.edu NR 30 TC 0 Z9 0 U1 0 U2 6 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0021-8936 J9 J APPL MECH-T ASME JI J. Appl. Mech.-Trans. ASME PD MAY PY 2005 VL 72 IS 3 BP 365 EP 373 DI 10.1115/1.1876396 PG 9 WC Mechanics SC Mechanics GA 931NC UT WOS:000229491000006 ER PT J AU Calhoun, R Gouveia, F Shinn, J Chan, S Stevens, D Lee, R Leone, J AF Calhoun, R Gouveia, F Shinn, J Chan, S Stevens, D Lee, R Leone, J TI Flow around a complex building: Experimental and large-eddy simulation comparisons SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID TURBULENT; SURFACE; MODEL; LAYER AB A field program to study atmospheric releases around a complex building was performed in the summers of 1999 and 2000. The focus of this paper is to compare field data with a large-eddy simulation (LES) code to assess the ability of the LES approach to yield additional insight into atmospheric release scenarios. In particular, transient aspects of the velocity and concentration signals are studied. The simulation utilized the finite-element method with a high-fidelity representation of the complex building. Trees were represented with a canopy term in the momentum equation. Inflow and outflow conditions were used. The upwind velocity was constructed from a logarithmic law fitted to velocities obtained on two levels from a tower equipped with a 2D sonic anemometer. A number of different kinds of comparisons of the transient velocity and concentration signals are presented-direct signal versus time, spectral, Reynolds stresses, turbulent kinetic energy signals, and autocorrelations. It is concluded that the LES approach does provide additional insight, but the authors argue that the proper use of LES should include consideration of cost and may require an increased connection to field sensors; that is, higher-resolution boundary and initial conditions need to be provided to realize the full potential of LES. C1 Arizona State Univ, Tempe, AZ 85287 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Calhoun, R (reprint author), Arizona State Univ, POB 876106, Tempe, AZ 85287 USA. EM ron.calhoun@asu.edu NR 18 TC 9 Z9 10 U1 0 U2 3 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD MAY PY 2005 VL 44 IS 5 BP 571 EP 590 DI 10.1175/JAM2219.1 PG 20 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 938KX UT WOS:000230003400002 ER PT J AU Cao, H Bai, FM Li, JF Viehland, D Xu, GY Hiraka, H Shirane, G AF Cao, H Bai, FM Li, JF Viehland, D Xu, GY Hiraka, H Shirane, G TI Structural phase transformation and phase boundary/stability studies of field-cooled Pb(Mg1/3Nb2/3O3)-32%PbTiO3 crystals SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MONOCLINIC PHASE; SINGLE-CRYSTALS; ELECTRIC-FIELD AB Structural phase transformations in (001)-oriented (1-x)Pb(Mg1/3Nb2/3O3)-32%PbTiO3 crystals have been investigated by x-ray diffraction. A C -> T -> M-C sequence was observed in both the field-cooled and zero-field-cooled conditions. Most interestingly, an anomalous increase in the C -> T phase boundary with increasing field has been observed, which is seemingly a common characteristic of crystals whose compositions are in the vicinity of the morphotropic phase boundary, irrespective of the width of the T and M-C phase regions. (C) 2005 American Institute of Physics. C1 Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan. RP Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. EM hcao@vt.edu RI Xu, Guangyong/A-8707-2010; Bai, Feiming/K-5762-2013 OI Xu, Guangyong/0000-0003-1441-8275; NR 17 TC 23 Z9 23 U1 0 U2 10 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 094101 DI 10.1063/1.1883723 PG 4 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600068 ER PT J AU Goncharov, AF Zaug, JM Crowhurst, JC Gregoryanz, E AF Goncharov, AF Zaug, JM Crowhurst, JC Gregoryanz, E TI Optical calibration of pressure sensors for high pressures and temperatures SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DIAMOND-ANVIL CELL; FLUORESCENCE SHIFTS; SM-YAG; RUBY; GPA; DEPENDENCE; GAUGE; SCALE; RANGE; LINES AB We present the results of Raman-scattering measurements of diamond (C-12) and of cubic boron nitride, and fluorescence measurements of ruby, Sm:yttrium aluminum garnet (Sm:YAG), and SrB4O7:Sm2+ in the diamond anvil cell at high pressures and temperatures. These measurements were accompanied by synchrotron x-ray-diffraction measurements on gold. We have extended the room-temperature calibration of Sm:YAG in a quasihydrostatic regime up to 100 GPa. The ruby scale is found to systematically underestimate pressure at high pressures and temperatures compared with all the other sensors. On this basis, we propose an alternative high-temperature ruby pressure scale that is valid to at least 100 GPa and 850 K. (C) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA. RP Goncharov, AF (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA. EM goncharov1@llnl.gov NR 30 TC 19 Z9 19 U1 1 U2 27 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 094917 DI 10.1063/1.1895467 PG 5 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600108 ER PT J AU Myers, SM Seager, CH AF Myers, SM Seager, CH TI Interaction of defects and H in proton-irradiated GaN(Mg, H) SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MG-DOPED GAN; GALLIUM NITRIDE; WURTZITE GAN; HYDROGEN; SPECTROSCOPY; DIFFUSION; ENERGIES; COMPLEX AB Magnesium-doped, p-type GaN containing H was irradiated with MeV protons at room temperature and then annealed at a succession of increasing temperatures, with the behavior of defects and H in the material being followed through infrared absorption spectroscopy, nuclear-reaction analysis of the H, and photoluminescence. The results support the annihilation of Ga Frenkel pairs near room temperature, leaving the N interstitial and N vacancy to influence the elevated-temperature behavior. Multiple changes are observed with increasing temperature, ending with thermal release of the H above 700 degrees C. These effects are interpreted in terms of a succession of complexes involving Mg, the point defects, and H. (C) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Myers, SM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM smmyers@sandia.gov NR 27 TC 8 Z9 8 U1 4 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 093517 DI 10.1063/1.1883309 PG 6 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600027 ER PT J AU Peterson, PD Mang, JT Asay, BW AF Peterson, PD Mang, JT Asay, BW TI Quantitative analysis of damage in an octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazonic-based composite explosive subjected to a linear thermal gradient SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DELTA PHASE-TRANSITION; ENERGETIC NITRAMINE OCTAHYDRO-1,3,5,7-TETRANITRO-1,3,5,7-TETRAZOCINE; CRYSTALLIZATION; SCATTERING AB The microstructure within a slowly heated, consolidated explosive will be influenced by both physical changes and chemical reactions prior to thermal ignition. Thermal expansion, exothermic decomposition, endothermic phase change, and increased binder viscosity play significant roles in the cook-off to detonation. To further explore the details of this intricate cook-off process, we have conducted a series of experiments in which a carefully controlled temperature gradient has been applied along a cylinder of PBX 9501 [94.9/2.5/2.5/0.1-wt % octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX)/Estane 5703/a eutectic mixture of bis(2,2 dinitropropyl) acetal and bis(2,2-dinitropropyl) formal [abbreviated BDNPA-F]/Irganox] and maintained for a specified amount of time. After heating and subsequent cooling of the PBX 9501, the sample morphology has been probed with polarized light microscopy and small-angle x-ray scattering. Using these techniques we have quantitatively characterized the particle morphology, porosity, and chemical state of the explosive as a function of position, and therefore thermal treatment. Results of the analyses clearly show that thermal damage in PBX 9501 can be classified into two separate temperature regimes-an initial low-temperature regime (155-174 degrees C) dominated by the endothermic beta-delta crystalline phase change, thermal expansion, and Ostwald ripening, and a high-temperature regime (175-210 degrees C) dominated by exothermic chemical decomposition. The results further show the complex interplay between the evolving sample morphology and the chemical reactions leading to a potential thermal self-ignition in the explosive. (C) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Peterson, PD (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM pdp@lanl.gov NR 23 TC 16 Z9 16 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 093507 DI 10.1063/1.1879072 PG 7 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600017 ER PT J AU Prater, WL Allen, EL Lee, WY Toney, MF Kellock, A Daniels, JS Hedstrom, JA Harrell, T AF Prater, WL Allen, EL Lee, WY Toney, MF Kellock, A Daniels, JS Hedstrom, JA Harrell, T TI Microstructural comparisons of ultrathin Cu films deposited by ion-beam and dc-magnetron sputtering SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MAGNETORESISTANCE SPIN VALVES; THIN METAL-FILMS; GIANT MAGNETORESISTANCE; CO/CU MULTILAYERS; THICKNESS DEPENDENCE; OXYGEN; TEMPERATURE; RESISTIVITY; GROWTH; SCATTERING AB We report and contrast both the electrical resistance and the microstructure of copper thin films deposited in an oxygen-containing atmosphere by ion-beam and dc-magnetron sputtering. For films with thicknesses of 5 nm or less, the resistivity of the Cu films is minimized at oxygen concentrations ranging from 0.2% to 1% for dc-magnetron sputtering and 6%-10% for ion-beam sputtering. Films sputtered under both conditions show a similar decrease of interface roughness with increasing oxygen concentration, although the magnetron-deposited films are smoother. The dc-magnetron-produced films have higher resistivity, have smaller Cu grains, and contain a higher concentration of cuprous oxide particles. We discuss the mechanisms leading to the grain refinement and the consequent reduced resistivity in both types of films. (C) 2005 American Institute of Physics. C1 San Jose State Univ, Dept Chem & Mat Engn, San Jose, CA 95192 USA. Hitachi Global Storage Technol, San Jose, CA 95193 USA. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA. RP Prater, WL (reprint author), Novellus Syst Inc, M-S HQ-2C,4000 N 1st St, San Jose, CA 95134 USA. EM walter.prater@novellus.com NR 36 TC 8 Z9 8 U1 1 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 093301 DI 10.1063/1.1886275 PG 9 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600008 ER PT J AU Pruet, J Descalle, MA Hall, J Pohl, B Prussin, SG AF Pruet, J Descalle, MA Hall, J Pohl, B Prussin, SG TI Neutron and photon transport in seagoing cargo containers SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RAYS FOLLOWING FISSION AB Factors affecting sensing of small quantities of fissionable material in large seagoing cargo containers by neutron interrogation and detection of beta-delayed photons are explored. The propagation of variable-energy neutrons in cargos, subsequent fission of hidden nuclear material and production of the beta-delayed photons, and the propagation of these photons to an external detector are considered explicitly. Detailed results of Monte Carlo simulations of these stages in representative cargos are presented. Analytical models are developed both as a basis for a quantitative understanding of the interrogation process and as a tool to allow ready extrapolation of our results to cases not specifically considered here. (C) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Div N, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. RP Pruet, J (reprint author), Lawrence Livermore Natl Lab, Div N, 7000 East Ave, Livermore, CA 94550 USA. EM pruet1@llnl.gov NR 9 TC 6 Z9 6 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 094908 DI 10.1063/1.1887835 PG 10 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600099 ER PT J AU Zhang, X Misra, A Wang, H Lima, AL Hundley, MF Hoagland, RG AF Zhang, X Misra, A Wang, H Lima, AL Hundley, MF Hoagland, RG TI Effects of deposition parameters on residual stresses, hardness and electrical resistivity of nanoscale twinned 330 stainless steel thin films SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID INSTRUMENTED SHARP INDENTATION; MULTILAYERS; EVOLUTION; STRAIN; CU AB We have explored the influence of sputtering parameters on the structural, mechanical, and electrical properties of nanoscale twinned 330 stainless steel thin films. As the residual stress in the film is changed from tensile to compressive by varying the growth conditions, the nanoscale twinned structure, the average columnar grain size and texture of the film show little or no change. Hardness of the film in compression reaches 7 GPa, compared to about 5.5 GPa in films with high residual tension, and an order of magnitude higher than that of bulk 330 stainless steel. Molecular dynamics simulations indicate that twin boundaries pose a strong barrier to glide dislocation transmission under applied in-plane biaxial loading, consistent with the GPa level strengths measured in these films. The increase in the room temperature electrical resistivity of these films, compared to bulk 330 stainless steel, is found to be small, indicating that nanoscale twinned structures may provide the best combination of high mechanical strengths and high electrical conductivity. (C) 2005 American Institute of Physics. C1 Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA. EM zhangx@tamu.edu RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012; Wang, Haiyan/P-3550-2014 OI Wang, Haiyan/0000-0002-7397-1209 NR 28 TC 43 Z9 43 U1 3 U2 33 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 2005 VL 97 IS 9 AR 094302 DI 10.1063/1.1883724 PG 5 WC Physics, Applied SC Physics GA 926WY UT WOS:000229155600076 ER PT J AU Zhang, Y Bischof, CH Easter, RC Wu, PT AF Zhang, Y Bischof, CH Easter, RC Wu, PT TI Sensitivity analysis of photochemical indicators for O-3 chemistry using automatic differentiation SO JOURNAL OF ATMOSPHERIC CHEMISTRY LA English DT Article DE automatic differentiation; mixed-phase chemistry; photochemical indicators; sensitivity analysis ID RADICAL PROPAGATION EFFICIENCY; ASSESS OZONE SENSITIVITY; ACID DEPOSITION MODEL; AIR-QUALITY MODEL; CHEMICAL MECHANISM; ATMOSPHERIC CHEMISTRY; HYDROCARBONS; CLOUDS; NOY AB Photochemical indicators for determination of O-3-NOx-ROG sensitivity and their sensitivity to model parameters are studied for a variety of polluted conditions using a comprehensive mixed-phase chemistry box model and the novel automatic differentiation ADIFOR tool. The main chemical reaction pathways in all phases, interfacial mass transfer processes, and ambient physical parameters that affect the indicators are identified and analyzed. Condensed mixed-phase chemical mechanisms are derived from the sensitivity analysis. Our results show that cloud chemistry has a significant impact on the indicators and their sensitivities, particularly on those involving H2O2, HNO3, HCHO, and NOz. Caution should be taken when applying the established threshold values of indicators in regions with large cloud coverage. Among the commonly used indicators, NOy and O-3/NOy are relatively insensitive to most model parameters, whereas indicators involving H2O2, HNO3, HCHO, and NOz are highly sensitive to changes in initial species concentrations, reaction rate constants, equilibrium constants, temperature, relative humidity, cloud droplet size, and cloud water content. C1 Pacific NW Natl Lab, Battelle, Atmospher Sci & Global Change Div, Richland, WA 99352 USA. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Zhang, Y (reprint author), N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Box 8208, Raleigh, NC 27695 USA. EM yang_zhang@ncsu.edu RI Bischof, Christian/D-2897-2009 NR 29 TC 3 Z9 4 U1 0 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-7764 J9 J ATMOS CHEM JI J. Atmos. Chem. PD MAY PY 2005 VL 51 IS 1 BP 1 EP 41 DI 10.1007/s10874-005-5440-8 PG 41 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 948CU UT WOS:000230694400001 ER PT J AU Qiu, XY Sundin, GW Wu, LY Zhou, JZ Tiedje, JM AF Qiu, XY Sundin, GW Wu, LY Zhou, JZ Tiedje, JM TI Comparative analysis of differentially expressed genes in Shewanella oneidensis MR-1 following exposure to UVC, UVB, and UVA radiation SO JOURNAL OF BACTERIOLOGY LA English DT Article ID NEAR-ULTRAVIOLET RADIATION; ESCHERICHIA-COLI HEMOLYSIN; GRAM-NEGATIVE BACTERIA; OXIDATIVE STRESS; MULTIDRUG EFFLUX; HYDROGEN-PEROXIDE; RESPONSE REGULON; POSITIVE CONTROL; I SECRETION; OXYR AB We previously reported that Shewanella oneidensis MR-1 is highly sensitive to UVC (254 nm), UVB (290 to 320 nm), and UVA (320 to 400 nm). Here we delineated the cellular response of MR-1 to UV radiation damage by analyzing the transcriptional profile during a 1-h recovering period after UVC, UVB, and UVA exposure at a dose that yields about a 20% survival rate. Although the SOS response was observed with all three treatments, the induction was more robust in response to short-wavelength UV radiation (UVB and UVC). Similarly, more prophage-related genes were induced by short-wavelength UV radiation. MR-1 showed an active detoxification mechanism in response to UVA, which included the induction of antioxidant enzymes and iron-sequestering proteins to scavenge reactive oxygen species. In addition, a great number of genes encoding multidrug and heavy metal efflux pumps were induced following UVA irradiation. Our data suggested that activation of prophages appears the major lethal factor in MR-1 following UVC or UVB irradiation, whereas oxidative damage contributes greatly to the high UVA sensitivity in MR-1. C1 Michigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824 USA. Michigan State Univ, Dept Plant Pathol, E Lansing, MI 48824 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Tiedje, JM (reprint author), Michigan State Univ, Ctr Microbial Ecol, 540 Plant & Soil Sci Bldg, E Lansing, MI 48824 USA. EM tiedjej@msu.edu NR 44 TC 39 Z9 40 U1 0 U2 17 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD MAY PY 2005 VL 187 IS 10 BP 3556 EP 3564 DI 10.1128/JB.187.10.3556-3564.2005 PG 9 WC Microbiology SC Microbiology GA 923NO UT WOS:000228916800034 PM 15866945 ER PT J AU Ager, JW Nalla, RK Breeden, KL Ritchie, RO AF Ager, JW Nalla, RK Breeden, KL Ritchie, RO TI Deep-ultraviolet Raman spectroscopy study of the effect of aging on human cortical bone SO JOURNAL OF BIOMEDICAL OPTICS LA English DT Article DE cortical bone; aging; Raman spectroscopy; fracture toughness ID AGE-RELATED-CHANGES; COLLAGEN CROSS-LINKS; INELASTIC NEUTRON-SCATTERING; FATIGUE-CRACK-PROPAGATION; FRACTURE-TOUGHNESS; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; MINERAL-CONTENT; FEMORAL-NECK; TISSUES AB The age-related deterioration in bone quality and consequent increase in fracture incidence is an obvious health concern that is becoming increasingly significant as the population ages. Raman spectroscopy with deep-ultraviolet excitation ( 244 nm) is used to measure vibrational spectra from human cortical bone obtained from donors over a wide age range ( 34 - 99 years). The UV Raman technique avoids the fluorescence background usually found with visible and near-infrared excitation and, due to resonance Raman effects, is particularly sensitive to the organic component of bone. Spectral changes in the amide I band at 1640 cm(-1) are found to correlate with both donor age and with previously reported fracture toughness data obtained from the same specimens. These results are discussed in the context of possible changes in collagen cross-linking chemistry as a function of age, and are deemed important to further our understanding of the changes in the organic component of the bone matrix with aging. (c) 2005 Society of Photo-Optical Instrumentation Engineers. C1 Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. RP Ritchie, RO (reprint author), Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM RORitchie@lbl.gov RI Ritchie, Robert/A-8066-2008; OI Ritchie, Robert/0000-0002-0501-6998; Ager, Joel/0000-0001-9334-9751 FU NIDCR NIH HHS [5R01 DE015633] NR 55 TC 52 Z9 53 U1 0 U2 19 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 1083-3668 J9 J BIOMED OPT JI J. Biomed. Opt. PD MAY-JUN PY 2005 VL 10 IS 3 AR 034012 DI 10.1117/1.1924668 PG 8 WC Biochemical Research Methods; Optics; Radiology, Nuclear Medicine & Medical Imaging SC Biochemistry & Molecular Biology; Optics; Radiology, Nuclear Medicine & Medical Imaging GA 009QN UT WOS:000235127400032 PM 16229656 ER PT J AU Mourant, JR Short, KW Carpenter, S Kunapareddy, N Coburn, L Powers, TM Freyer, JP AF Mourant, JR Short, KW Carpenter, S Kunapareddy, N Coburn, L Powers, TM Freyer, JP TI Biochemical differences in tumorigenic and nontumorigenic cells measured by Raman and infrared spectroscopy SO JOURNAL OF BIOMEDICAL OPTICS LA English DT Article DE mid-infrared spectroscopy; Raman spectroscopy; cancer diagnostics; biological cells; biochemical analysis ID IN-VIVO; IR SPECTROSCOPY; GLYCOGEN LEVELS; TISSUE; CLASSIFICATION; SPECTRA; CANCER; VITRO; CYCLE; MICROSPECTROSCOPY AB Both infrared and Raman spectroscopies have the potential to noninvasively estimate the biochemical composition of mammalian cells, although this cannot be unambiguously determined from analysis approaches such as peak assignment or multivariate classification methods. We have developed a fitting routine that determines biochemical composition using basis spectra for the major types of biochemicals found in mammalian cells (protein, DNA, RNA, lipid and glycogen), which is shown to be robust and reproducible. We measured both infrared and Raman spectra of viable suspensions of pairs of nontumorigenic and tumorigenic rat fibroblast cell lines. To model in vivo conditions, we compared nonproliferating, nontumorigenic cells to proliferating, tumorigenic cells. Reproducible differences in biochemical composition were found for both nontumorigenic/tumorigenic cell models, using both spectroscopic techniques. These included an increased fraction of protein and nucleic acids in the tumorigenic cells, with a corresponding decrease in lipid and glycogen fractions. Measurements of each cell type in both the proliferating and nonproliferating states showed that proliferative status was the major determinant of differences in vibrational spectra, rather than tumorigenicity per se. The smallness of the spectral changes associated with tumorgenicity may be due to the subtle nature of the oncogenic change in this system (a single mutant oncogene). (c) 2005 Society of Photo-Optical Instrumentation Engineers. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Mourant, JR (reprint author), Los Alamos Natl Lab, Biosci Div, MS E535, Los Alamos, NM 87545 USA. EM jmourant@lanl.gov FU NCI NIH HHS [CA89255, R01 CA089255]; NCRR NIH HHS [RR01315] NR 37 TC 43 Z9 44 U1 3 U2 11 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 1083-3668 J9 J BIOMED OPT JI J. Biomed. Opt. PD MAY-JUN PY 2005 VL 10 IS 3 AR 031106 DI 10.1117/1.1928050 PG 15 WC Biochemical Research Methods; Optics; Radiology, Nuclear Medicine & Medical Imaging SC Biochemistry & Molecular Biology; Optics; Radiology, Nuclear Medicine & Medical Imaging GA 009QN UT WOS:000235127400007 PM 16229631 ER PT J AU Chirico, RD Steele, WV AF Chirico, RD Steele, WV TI Thermodynamic properties of diphenylmethane SO JOURNAL OF CHEMICAL AND ENGINEERING DATA LA English DT Article ID VAPOR-PRESSURE MEASUREMENTS; 3RD VIRIAL-COEFFICIENT; AROMATIC-HYDROCARBONS; LIQUID-EQUILIBRIA; HEAT-CAPACITIES; TEMPERATURES; MIXTURES; ELEMENTS; BENZENE; ENTHALPIES AB Measurements leading to the calculation of the standard thermodynamic properties for gaseous diphenylmethane (Chemical Abstracts registry number [101-81-51) are reported. Experimental methods include adiabatic heat-capacity calorimetry, vibrating-tube densimetry, comparative ebulliometry, inclinedpiston gauge manometry, and differential-scanning calorimetry (dsc). Measurement results for the enthalpy of combustion were reported previously. The critical temperature was measured with a differential scanning calorimeter. The critical pressure and critical density were estimated. Standard molar entropies, standard molar enthalpies, and standard molar Gibbs free energies of formation were derived at selected temperatures between 298.15 K and 700 K. All results are compared with experimental values reported in the literature. C1 NIST, Phys & Chem Properties Div, Boulder, CO 80305 USA. Univ Tennessee, Dept Chem Engn, Phys Properties Res Facil, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Chirico, RD (reprint author), NIST, Phys & Chem Properties Div, Boulder, CO 80305 USA. EM steelewv@ornl.gov NR 53 TC 15 Z9 16 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0021-9568 J9 J CHEM ENG DATA JI J. Chem. Eng. Data PD MAY-JUN PY 2005 VL 50 IS 3 BP 1052 EP 1059 DI 10.1021/je050034s PG 8 WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA 926MW UT WOS:000229128300055 ER PT J AU Cellmer, T Bratko, D Prausnitz, JM Blanch, H AF Cellmer, T Bratko, D Prausnitz, JM Blanch, H TI Thermodynamics of folding and association of lattice-model proteins SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article AB Closely related to the "protein folding problem" is the issue of protein misfolding and aggregation. Protein aggregation has been associated with the pathologies of nearly 20 human diseases and presents serious difficulties during the manufacture of pharmaceutical proteins. Computational studies of multiprotein systems have recently emerged as a powerful complement to experimental efforts aimed at understanding the mechanisms of protein aggregation. We describe the thermodynamics of systems containing two lattice-model 64-mers. A parallel tempering algorithm abates problems associated with glassy systems and the weighted histogram analysis method improves statistical quality. The presence of a second chain has a substantial effect on single-chain conformational preferences. The melting temperature is substantially reduced, and the increase in the population of unfolded states is correlated with an increase in interactions between chains. The transition from two native chains to a non-native aggregate is entropically favorable. Non-native aggregates receive similar to 25% of their stabilizing energy from intraprotein contacts not found in the lowest-energy structure. Contact maps show that for non-native dimers, nearly 50% of the most probable interprotein contacts involve pairs of residues that form native contacts, suggesting that a domain-swapping mechanism is involved in self-association. (c) 2005 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Virginia Commonwealth Univ, Dept Chem, Richmond, VA 23284 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. EM blanch@berkeley.edu NR 36 TC 11 Z9 12 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 1 PY 2005 VL 122 IS 17 AR 174908 DI 10.1063/1.1888545 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 925PI UT WOS:000229064600056 PM 15910070 ER PT J AU Parsons, BF Chandler, DW AF Parsons, BF Chandler, DW TI An investigation of nonadiabatic interactions in Cl(P-2(j))+D-2 via crossed-molecular-beam scattering SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY SURFACES; CLASSICAL TRAJECTORY CALCULATIONS; MECHANICAL RATE COEFFICIENTS; CHLORINE ATOM REACTION; SPIN-ORBIT REACTIVITY; THERMAL RATE-CONSTANT; CL+H-2 REACTION; EXCITED-STATES; SECTIONS; PHOTOELECTRON AB We have determined limits on the cross section for both electronically nonadiabatic excitation and quenching in the Cl(P-2(j))+D-2 system. Our experiment incorporates crossed-molecular-beam scattering with state-selective Cl(P-2(1/2,3/2)) detection and velocity-mapped ion imaging. By colliding atomic chlorine with D-2, we address the propensity for collisions that result in a change of the spin-orbit level of atomic chlorine either through electronically nonadiabatic spin-orbit excitation Cl(P-2(3/2))+D-2 -> Cl-*(P-2(1/2))+D-2 or through electronically nonadiabatic spin-orbit quenching Cl-*(P-2(1/2))+D-2 -> Cl(P-2(3/2))+D-2. In the first part of this report, we estimate an upper limit for the electronically nonadiabatic spin-orbit excitation cross section at a collision energy of 5.3 kcal/mol, which lies above the energy of the reaction barrier (4.9 kcal/mol). Our analysis and simulation of the experimental data determine an upper limit for the excitation cross section as sigma(NA)<= 0.012 A(2). In the second part of this paper we investigate the propensity for electronically nonadiabatic spin-orbit quenching of Cl-* following a collision with D-2 or He. We perform these experiments at collision energies above and below the energy of the reaction barrier. By comparing the amount of scattered Cl-* in our images to the amount of Cl-* lost from the atomic beam we obtain the maximum cross section for electronically nonadiabatic quenching as sigma(NA)<= 15(-15)(+44) A(2) for a collision energy of 7.6 kcal/mol. Our experiments show the probability for electronically nonadiabatic quenching in Cl-*+D-2 to be indistinguishable to that for the kinematically identical system of Cl-*+He. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA. RP Parsons, BF (reprint author), Sandia Natl Labs, Combust Res Facil, 7011 E Ave, Livermore, CA 94550 USA. EM chand@sandia.gov NR 52 TC 11 Z9 11 U1 2 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 1 PY 2005 VL 122 IS 17 AR 174306 DI 10.1063/1.1881212 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 925PI UT WOS:000229064600017 PM 15910031 ER PT J AU Vines, F Sousa, C Liu, P Rodriguez, JA Illas, F AF Vines, F Sousa, C Liu, P Rodriguez, JA Illas, F TI A systematic density functional theory study of the electronic structure of bulk and (001) surface of transition-metals carbides SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article AB A systematic study of the bulk and surface geometrical and electronic properties of a series of transition-metal carbides (TMC with TM=Ti, V, Zr, Nb, Mo, Hf, Ta, and W) by first-principles methods is presented. It is shown that in these materials the chemical bonding is strongly covalent, the cohesive energies being directly related to the bonding-antibonding gap although the shift of the center of the C(2s) band related peak in the density of states with respect to diamond indicates that some metal to carbon charge transfer does also take place. The (001) face of these metal carbides exhibits a noticeable surface rumpling which grows along the series. It is shown that neglecting surface relaxation results in very large errors on the surface energy and work function. The surface formation induces a significant shift of electronic energy levels with respect to the corresponding values in the bulk. The extent and nature of the shift can be understood from simple bonding-antibonding arguments and is enhanced by the structural rippling of this surface. (c) 2005 American Institute of Physics. C1 Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain. Univ Barcelona, Ctr Especial Recerca Quim Teor, E-08028 Barcelona, Spain. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Illas, F (reprint author), Univ Barcelona, Dept Quim Fis, Parc Cientif Barcelona,C Marti & Franques 1, E-08028 Barcelona, Spain. EM francesc.illas@ub.edu RI Sousa, Carmen/F-4105-2011; Illas, Francesc /C-8578-2011; OI Sousa, Carmen/0000-0002-1915-1111; Illas, Francesc /0000-0003-2104-6123; Vines, Francesc/0000-0001-9987-8654 NR 62 TC 88 Z9 89 U1 8 U2 53 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 MAY 1 PY 2005 VL 122 IS 17 AR 174709 DI 10.1063/1.1888370 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 925PI UT WOS:000229064600048 PM 15910062 ER PT J AU Gallagher, NB Blake, TA Gassman, PL AF Gallagher, NB Blake, TA Gassman, PL TI Application of extended inverse scatter correction to mid-infrared reflectance spectra of soil SO JOURNAL OF CHEMOMETRICS LA English DT Article DE chemometrics; extended multiplicative scatter correction; quantification; soil reflectance spectroscopy; dibutyl phosphate ID MULTIPLICATIVE SIGNAL CORRECTION; STANDARDS; MEAT AB Scattering artifacts adversely affect infrared reflectance measurements of powders and soils, and extended inverse scatter correction (EISC) is a flexible method useful for correcting these artifacts. EISC was used to correct mid-infrared reflectance spectra of two different soils coated with dibutyl phosphate and the results were examined using regression analysis. To obtain the correction, EISC fits a measured spectrum to a reference spectrum. However, if measured spectra contain features not included in the reference spectrum the fit can be biased resulting in poor correction. Weighted and robust least squares were used to account for these potential biases. Additionally, the present work demonstrates how analyte-free samples can be used to determine basis functions for an extended mixture model used in the correction. Corrected spectra resulted in partial least squares models that performed at least as well as 2nd derivative spectra and were more interpretable. Copyright (C) 2006 John Wiley & Sons, Ltd. C1 Eigenvector Res Inc, Manson, WA 98831 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Gallagher, NB (reprint author), Eigenvector Res Inc, POB 561, Manson, WA 98831 USA. EM nealg@eigenvector.com NR 17 TC 22 Z9 22 U1 1 U2 5 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0886-9383 J9 J CHEMOMETR JI J. Chemometr. PD MAY-JUL PY 2005 VL 19 IS 5-7 BP 271 EP 281 DI 10.1002/cem.929 PG 11 WC Automation & Control Systems; Chemistry, Analytical; Computer Science, Artificial Intelligence; Instruments & Instrumentation; Mathematics, Interdisciplinary Applications; Statistics & Probability SC Automation & Control Systems; Chemistry; Computer Science; Instruments & Instrumentation; Mathematics GA 012ZA UT WOS:000235378200003 ER PT J AU He, TX Hsu, LC Shiue, PJS Torney, DC AF He, TX Hsu, LC Shiue, PJS Torney, DC TI A symbolic operator approach to several summation formulas for power series SO JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS LA English DT Article DE symbolic summation operator; power series; generating function; Eulerian fraction; Eulerian polynomial; Eulerian numbers; Newton's interpolation; event's interpolation; Gauss interpolation AB This paper deals with the summation problem of power series of the form S-a(b)(f ; x) = Sigma(aless than or equal tokless than or equal tob) f(k)x(k), where 0 less than or equal to a < b less than or equal to infinity, and {f(k)} is a given sequence of numbers with k is an element of [a, b) or f (t) is a differentiable function defined on [a, b). We present a symbolic summation operator with its various expansions, and construct several summation formulas with estimable remainders for S-a(b)(f ; x), by the aid of some classical interpolation series due to Newton, Gauss and Everett, respectively. (C) 2004 Elsevier B.V. All rights reserved. C1 Illinois Wesleyan Univ, Dept Math & Comp Sci, Bloomington, IL 61702 USA. Dalian Univ Technol, Dept Math, Dalian 116024, Peoples R China. Univ Nevada, Dept Math Sci, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP He, TX (reprint author), Illinois Wesleyan Univ, Dept Math & Comp Sci, Bloomington, IL 61702 USA. EM the@iwu.edu RI He, Tian-Xiao/G-5486-2013 NR 11 TC 2 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-0427 J9 J COMPUT APPL MATH JI J. Comput. Appl. Math. PD MAY 1 PY 2005 VL 177 IS 1 BP 17 EP 33 DI 10.1016/j.cam.2004.08.002 PG 17 WC Mathematics, Applied SC Mathematics GA 895TH UT WOS:000226886000002 ER PT J AU Aspuru-Guzik, A Salomon-Ferrer, R Austin, B Lester, WA AF Aspuru-Guzik, A Salomon-Ferrer, R Austin, B Lester, WA TI A sparse algorithm for the evaluation of the local energy in quantum Monte Carlo SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article DE electronic structure; quantum Monte Carlo; linear diffusion Monte Carlo; sparse methods ID MOLECULAR-ORBITALS; ELECTRONIC-STRUCTURE; AB-INITIO; CHEMISTRY; ATOMS AB A new algorithm is presented for the sparse representation and evaluation of Slater determinants in the quantum Monte Carlo (QMC) method. The approach, combined with the use of localized orbitals in a Slater-type orbital basis set, significantly extends the size molecule that can be treated with the QMC method. Application of the algorithm to systems containing up to 390 electrons confirms that the cost of evaluating the Slater determinant scales linearly with system size. (c) 2005 Wiley Periodicals, Inc. C1 Univ Calif Berkeley, Dept Chem, Kenneth S Pitzer Ctr Theoret Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Aspuru-Guzik, A (reprint author), Univ Calif Berkeley, Dept Chem, Kenneth S Pitzer Ctr Theoret Chem, Berkeley, CA 94720 USA. EM alan@aspuru.com RI Aspuru-Guzik, Alan/A-4984-2008 OI Aspuru-Guzik, Alan/0000-0002-8277-4434 NR 28 TC 23 Z9 23 U1 0 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0192-8651 J9 J COMPUT CHEM JI J. Comput. Chem. PD MAY PY 2005 VL 26 IS 7 BP 708 EP 715 DI 10.1002/jcc.20205 PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA 916GG UT WOS:000228372800007 PM 15761862 ER PT J AU Shadid, JN Tuminaro, RS Devine, KD Hennigan, GL Lin, PT AF Shadid, JN Tuminaro, RS Devine, KD Hennigan, GL Lin, PT TI Performance of fully coupled domain decomposition preconditioners for finite element transport/reaction simulations SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE Newton-Krylov; fully coupled solvers; Schwarz domain decomposition; two-level methods; multilevel methods; parallel methods; stabilized finite element methods ID NAVIER-STOKES EQUATIONS; COMPUTATIONAL FLUID-DYNAMICS; KRYLOV METHODS; ITERATIVE SOLUTION; FLOW; FORMULATION; SYSTEMS; CONVECTION; CAVITY; HEAT AB In this paper, we describe an iterative linear system solution methodology used for parallel unstructured finite element simulation of strongly coupled fluid flow, heat transfer, and mass transfer with nonequilibrium chemical reactions. The nonlinear/linear iterative solution strategies are based on a fully coupled Newton solver with preconditioned Krylov subspace methods as the underlying linear iteration. Our discussion considers computational efficiency, robustness and a number of practical implementation issues. The evaluated preconditioners are based on additive Schwarz domain decomposition methods which are applicable for totally unstructured meshes. A number of different aspects of Schwarz schemes are considered including subdomain solves, use of overlap and the introduction of a coarse grid solve (a two-level scheme). As we will show, the proper choice among domain decomposition options is often critical to the efficiency of the overall solution scheme. For this comparison we use a particular spatial discretization of the governing transport/reaction partial differential equations (PDEs) based on a stabilized finite element formulation. Results are presented for a number of standard 2D and 3D computational fluid dynamics (CFD) benchmark problems and some large 3D flow, transport and reacting flow application problems. (c) 2004 Elsevier Inc. All rights reserved. C1 Sandia Natl Labs, Computat Sci, Albuquerque, NM 87185 USA. RP Lin, PT (reprint author), Sandia Natl Labs, Computat Sci, POB 5800,MS 0316, Albuquerque, NM 87185 USA. EM jnshadi@sandia.gov; ptlin@sandia.gov NR 39 TC 27 Z9 27 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY 1 PY 2005 VL 205 IS 1 BP 24 EP 47 DI 10.1016/j.jcp.2004.10.038 PG 24 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 920RF UT WOS:000228707100002 ER PT J AU Trebotich, D Colella, P Miller, GH AF Trebotich, D Colella, P Miller, GH TI A stable and convergent scheme for viscoelastic flow in contraction channels SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE viscoelastic flow; oldroyd-b fluid; Maxwell fluid; projection methods; contraction channels ID NAVIER-STOKES EQUATIONS; OLDROYD-B; PLANAR CONTRACTIONS; PROJECTION METHOD; FLUIDS; 2ND-ORDER AB We present a new algorithm to simulate unsteady viscoelastic flows in abrupt contraction channels. In our approach we split the viscoelastic terms of the Oldroyd-B constitutive equation using Duhamel's formula and discretize the resulting PDEs using a semi-implicit finite difference method based on a Lax-Wendroff method for hyperbolic terms. In particular, we leave a small residual elastic term in the viscous limit by design to make the hyperbolic piece well-posed. A projection method is used to impose the incompressibility constraint. We are able to compute the full range of unsteady elastic flows in an abrupt contraction channel - from the viscous limit to the elastic limit - in a stable and convergent manner. We demonstrate the range of our method for unsteady flow of a Maxwell fluid with and without viscosity in planar contraction channels. We also demonstrate stable and convergent results for benchmark high Weissenberg number problems at We = 1 and We = 10. Published by Elsevier Inc. C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. Lawrence Berkeley Lab, Appl Numer Algorithmus Grp, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. RP Trebotich, D (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, POB 808,L-560, Livermore, CA 94551 USA. EM trebotichl@llnl.gov; pcolella@lbl.gov; grgmiller@ucdavis.edu NR 28 TC 31 Z9 31 U1 1 U2 10 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY 1 PY 2005 VL 205 IS 1 BP 315 EP 342 DI 10.1016/j.jcp.2004.11.007 PG 28 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 920RF UT WOS:000228707100015 ER PT J AU Kowalski, M AF Kowalski, M TI Measuring diffuse neutrino fluxes with IceCube SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS LA English DT Article DE ultra high energy photons and neutrinos; neutrino detectors; neutrino and gamma astronomy; cosmological neutrinos AB In this paper the sensitivity of a future kilometre-sized neutrino detector to detect and measure the diffuse flux of high energy neutrinos is evaluated. Event rates in established detection channels, such as muon events from charged current. nu(mu) interactions or cascade events from nu(e) and nu(tau) interaction, are calculated using a detailed Monte Carlo simulation. Neutrino fluxes as expected from prompt charm decay in the atmosphere or from astrophysical sources such as Active Galactic Nuclei are modelled assuming power laws. The ability to measure the normalization and slope of these spectra is then analysed. It is found that the cascade channel generally has a high sensitivity for the detection and characterization of the diffuse flux, when compared to what is expected for the upgoing- and downgoing-muon channels. A flux at the level of the Waxman-Bahcall upper bound should be detectable in all channels separately while a combination of the information of the different channels will allow detection of a flux more than one order of magnitude lower. Neutrinos from the prompt decay of charmed mesons in the atmosphere should be detectable in future measurements for all but the lowest predictions. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM MPKowalski@lbl.gov RI Kowalski, Marek/G-5546-2012 NR 31 TC 6 Z9 6 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 1475-7516 J9 J COSMOL ASTROPART P JI J. Cosmol. Astropart. Phys. PD MAY PY 2005 IS 5 AR 010 DI 10.1088/1475-7516/2005/05/010 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 936XN UT WOS:000229888900002 ER PT J AU Klie, RF Arslan, I Browning, ND AF Klie, RF Arslan, I Browning, ND TI Atomic resolution electron energy-loss spectroscopy SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA LA English DT Article DE STEM; EELS; HAADF; SrTiO3; MgB2; GaN; Al2O3 ID CHEMICAL-VAPOR-DEPOSITION; GRAIN-BOUNDARIES; INELASTIC-SCATTERING; MGB2; MICROSCOPE; SRTIO3; OXIDE; SUPERCONDUCTIVITY; INTERFACES; CRYSTALS AB Electron energy-loss spectroscopy (EELS) has been successfully used to measure the electronic structure of materials with atomic (i.e. sub-nanometer) spatial resolution. Furthermore, the combination of incoherent Z-contrast imaging and EELS allows us to correlate structural features, such as defects or interfaces directly with the changes in the local electronic structure. In this review, we will discuss the theoretical aspects and experimental procedures for achieving atomic-resolution EELS. In particular, we will describe the practicalities of the combination of Z-contrast imaging and EELS, used in the scanning transmission electron microscopy mode and also describe some of our recent results where column-by-column EELS has helped solve important material science problems. (c) 2004 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. RP Klie, RF (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. EM klie@bnl.gov OI Browning, Nigel/0000-0003-0491-251X NR 57 TC 8 Z9 8 U1 0 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0368-2048 J9 J ELECTRON SPECTROSC JI J. Electron Spectrosc. Relat. Phenom. PD MAY PY 2005 VL 143 IS 2-3 BP 105 EP 115 DI 10.1016/j.elspec.2004.05.009 PG 11 WC Spectroscopy SC Spectroscopy GA 910YP UT WOS:000227968400007 ER PT J AU Grogger, W Varela, M Ristau, R Schaffer, B Hofer, F Krishnan, KM AF Grogger, W Varela, M Ristau, R Schaffer, B Hofer, F Krishnan, KM TI Energy-filtering transmission electron microscopy on the nanometer length scale SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA LA English DT Article DE EELS; EFTEM; spatial resolution; elemental mapping ID EFTEM ELEMENTAL MAPS; IONIZATION CROSS-SECTIONS; SCATTER DIAGRAM ANALYSIS; SPATIAL-RESOLUTION; RECORDING MEDIA; YBA2CU3O7-X/PRBA2CU3O7 SUPERLATTICES; DISTRIBUTION IMAGES; CR SEGREGATION; K-SHELL; GROWTH AB Energy-filtering transmission electron microscopy (EFTEM), developed about ten years ago, is now a routine analysis tool in the characterization of materials. Based on the physical principles of electron energy-loss spectrometry (EELS), but with the addition of in-column or post-column energy-filters, it forms images of microstructures using a narrow energy band of inelastically scattered electrons. Post-column energy-filters, developed commercially by Gatan (Gatan Imaging Filter, GIF) in the early 1990s, could be attached to nearly any TEM. Almost at the same time, the introduction of the EM-912 microscope with an integrated Omega-filter by Zeiss, made it possible to use in-column filters as well. These two developments made EFTEM possible on an almost routine basis. The operation of these filters is rather straightforward and it is now possible to acquire element specific images within a few minutes. However, the optimal setup for data acquisition, the judicious choice of experimental parameters to solve specific materials science problems and the interpretation of the results can be rather difficult. For best results, a fundamental knowledge of the underlying physics of EELS and a systematic development of the technical details is necessary. In this work, we discuss the current status of EFTEM in terms of spatial resolution and illustrate it with a few technologically relevant applications at the nanometer length scale. (c) 2004 Elsevier B.V. All rights reserved. C1 Graz Univ Technol, FELMI, Res Inst Electron Microscopy, A-8010 Graz, Austria. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN USA. Seagate Recording Media, Fremont, CA USA. Univ Washington, Dept Mat Sci, Seattle, WA 98195 USA. RP Grogger, W (reprint author), Graz Univ Technol, FELMI, Res Inst Electron Microscopy, Steyrergasse 17, A-8010 Graz, Austria. EM werner.grogger@felmi-zfe.at; kannanmk@u.washington.edu RI Varela, Maria/H-2648-2012; Varela, Maria/E-2472-2014; OI Varela, Maria/0000-0002-6582-7004; Hofer, Ferdinand/0000-0001-9986-2193 NR 48 TC 15 Z9 16 U1 3 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0368-2048 J9 J ELECTRON SPECTROSC JI J. Electron Spectrosc. Relat. Phenom. PD MAY PY 2005 VL 143 IS 2-3 BP 139 EP 147 DI 10.1016/j.elspec.2004.09.028 PG 9 WC Spectroscopy SC Spectroscopy GA 910YP UT WOS:000227968400010 ER PT J AU Vanamu, G Robbins, J Khraishi, TA Datye, AK Zaidi, SH AF Vanamu, G Robbins, J Khraishi, TA Datye, AK Zaidi, SH TI Modeling and experiments on epitaxially grown multilayers with implications to critical thickness SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT Symposium on Challenges in Advances Thin Films CY MAR 14-18, 2004 CL Charlotte, NC SP TMS Elect Magnet and Photon Mat Div, Thin Film & Interfaces Comm, ASM Int, Mat Sci Crit Technol Sector DE Si; graded Ge (SixGe1-x) stress; critical thickness; epitaxial multilayers ID HIGH-ELECTRON-MOBILITY; LAYERS; HETEROSTRUCTURES; SUBSTRATE; SI/SIGE; GE; SI AB In this study, using the equations for static equilibrium and Hooke's law for isotropic materials under a plane stress condition, the elastic fields associated with each layer have been calculated. A model has been developed to calculate the elastic fields in multilayers grown epitaxially on a planar substrate, The strain partitioning in this model reduces to the limiting case of a two-layer structure that is available in the literature. We have chosen a particular system (SiGe) and calculated strain energy density for any number (N) of layers of graded Ge (SixGe1-x) on silicon. The model was compared with experiment for graded SiGe grown over a planar silicon substrate. The results revealed qualitative agreement between the calculated strain energy density and the experimentally observed dislocation density in the layers. The effect of the choice of a strain partitioning model on the calculation of a film/epilayer critical thickness is demonstrated. C1 Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87131 USA. Univ New Mexico, Dept Engn Mech, Albuquerque, NM 87131 USA. Gratings Inc, Albuquerque, NM 87107 USA. RP Vanamu, G (reprint author), Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. EM khraishi@me.unm.edu OI Datye, Abhaya/0000-0002-7126-8659 NR 16 TC 2 Z9 2 U1 0 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 2005 VL 34 IS 5 BP 522 EP 527 DI 10.1007/s11664-005-0060-2 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 930JJ UT WOS:000229411600009 ER PT J AU Adams, TM Duncan, AJ Fitz-Gerald, J AF Adams, TM Duncan, AJ Fitz-Gerald, J TI Characterization of environmental stability of pulsed laser deposited oxide ceramic coatings SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT Symposium on Challenges in Advances Thin Films CY MAR 14-18, 2004 CL Charlotte, NC SP TMS Elect Magnet and Photon Mat Div, Thin Film & Interfaces Comm, ASM Int, Mat Sci Crit Technol Sector DE steel substrates; Al2O3; Al; coating stability ID HYDROGEN PERMEATION; ABLATION; BARRIER; FILMS; OXIDATION; TARGET; STEEL; N-2 AB A systematic investigation of candidate hydrogen permeation materials deposited on various substrates using pulsed laser deposition (PLD) has been performed. The investigation focused on application of leading permeation-resistant material types on stainless steel substrates and evaluation of the stability of the deposited coatings. Type 304L stainless steel substrates were coated with aluminum oxide, chromium oxide, and aluminum. Characterization of the coating-substrate system adhesion was performed using scratch adhesion testing. Coating stability and environmental susceptibility were evaluated for two conditions-air at 350 degrees C and Ar-H-2 at 350 degrees C for up to 100 h. Results from this study have shown these coatings to be robust and the pulsed laser deposition process to be an extremely versatile technology. C1 Savannah River Natl Lab, Mat Appl & Proc Technol Grp, Aiken, SC 29808 USA. Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. RP Adams, TM (reprint author), Savannah River Natl Lab, Mat Appl & Proc Technol Grp, Aiken, SC 29808 USA. EM thad.adams@sml.doc.gov NR 16 TC 1 Z9 1 U1 1 U2 5 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 2005 VL 34 IS 5 BP 551 EP 558 DI 10.1007/s11664-005-0064-y PG 8 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 930JJ UT WOS:000229411600013 ER PT J AU Sopori, B AF Sopori, B TI Dielectric films for Si solar cell applications SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT Symposium on Challenges in Advances Thin Films CY MAR 14-18, 2004 CL Charlotte, NC SP TMS Elect Magnet and Photon Mat Div, Thin Film & Interfaces Comm, ASM Int, Mat Sci Crit Technol Sector DE SiNiH; plasma-enhanced chemical vapor deposition (PECVD); solar cell fabrication ID SI-SIO2 INTERFACE; ANTIREFLECTION COATINGS; RECOMBINATION; SURFACE; ILLUMINATION; PARAMETERS AB Thin films of many dielectric materials have been used in the past for fabrication of solar cells and as a part of their device structure. However, current efforts to reduce solar cell costs in commercial production have led to simplification of cell design and fabrication. Use of self-aligning techniques has obviated the need for photolithography and conventional masking with dielectric films for cell fabrication. Currently, the most favored dielectric material in Si solar cell production is SiN:H, deposited by the plasma-enhanced chemical vapor deposition (PECVD) process. The SiN:H layer and its processing play multiple roles of serving as an antireflection coating, a surface passivating layer, a buffer layer through which metal is fired, and a means of transporting hydrogen into the bulk of the solar cell. In order to optimize the solar cell performance, the SiN:H layer must meet some conflicting demands. The various applications of the SiN:H layer in solar cell fabrication are described here. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Sopori, B (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. EM bhushan_sopori@nrel.gov NR 20 TC 14 Z9 14 U1 0 U2 4 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 2005 VL 34 IS 5 BP 564 EP 570 DI 10.1007/s11664-005-0066-9 PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 930JJ UT WOS:000229411600015 ER PT J AU Johnson, MC Liliental-Weber, Z Zakharov, DN McCready, DE Jorgenson, RJ Wu, J Shan, W Bourret-Courchesne, ED AF Johnson, MC Liliental-Weber, Z Zakharov, DN McCready, DE Jorgenson, RJ Wu, J Shan, W Bourret-Courchesne, ED TI Investigation of microstructure and V-defect formation in InxGa1-xN/GaN MQW grown using temperature-gradient metalorganic chemical vapor deposition SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE V defects (pinholes); InGaN/GaN; high-resolution x-ray diffraction; (XRD); transmission electron microscopy; metalorganic chemical vapor deposition (MOCVD) ID LIGHT-EMITTING-DIODES; MULTIPLE-QUANTUM WELLS; FORMATION MECHANISM; MULTIQUANTUM WELLS; PIT FORMATION; INGAN/GAN; GAN; RELAXATION; EPILAYERS; SAPPHIRE AB Temperature-gradient metalorganic chemical vapor deposition (MOCVD) was used to deposit InxGa1-x/GaN multiple quantum well (MQW) structures with a concentration gradient of indium across the wafer. These MQW structures were deposited on low defect density (2 X 10(8) cm(-2)) GaN template layers for investigation of microstructural properties and V-defect (pinhole) formation. Room temperature (RT) photoluminescence (PL) and photomodulated transmission (PT) were used for optical characterization, which show a systematic decrease in emission energy for a decrease in growth temperature. Triple-axis x-ray diffraction (XRD), scanning electron microscopy, and cross-sectional transmission electron microscopy were used to obtain microstructural properties of different regions across the wafer. Results show that there is a decrease in crystal quality and an increase in V-defect formation with increasing indium concentration. A direct correlation was found between V-defect density and growth temperature due to increased strain and indium segregation for increasing indium concentration. C1 Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Oriol Inc, Santa Clara, CA 95054 USA. RP Johnson, MC (reprint author), Lawrence Berkeley Lab, Div Sci Mat, 1000 Centennial Dr, Berkeley, CA 94720 USA. EM mcjohnson@lbl.gov RI Liliental-Weber, Zuzanna/H-8006-2012; Zakharov, Dmitri/F-4493-2014; Wu, Junqiao/G-7840-2011 OI Wu, Junqiao/0000-0002-1498-0148 NR 30 TC 6 Z9 6 U1 0 U2 10 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 2005 VL 34 IS 5 BP 605 EP 611 DI 10.1007/s11664-005-0072-y PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 930JJ UT WOS:000229411600021 ER PT J AU Lu, GP Zheng, CM Wolfsberg, A AF Lu, GP Zheng, CM Wolfsberg, A TI Effect of uncertain hydraulic conductivity on the simulated fate and transport of BTEX compounds at a field site SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article ID NATURAL ATTENUATION; AEROBIC BIODEGRADATION; ORGANIC CONTAMINANTS; SANDY AQUIFER; GROUNDWATER; BEHAVIOR; XYLENE; MODEL AB Monte Carlo simulations were conducted to investigate the effect Of uncertain hydraulic conductivity (K) on the natural attenuation of BTEX Compounds (benzene, toluene, ethyl benzene, and xylenes) through aerobic respiration, denitrification, Fe(III) and sulfate reductions, and methanogenesis observed at a field site oil Hill Air Force Base, Utah. First, the uncertainty in the In K field was represented by Multiple realizations of spatially correlated random fields. The simulated BTEX plumes resulting from a light nonaqueous phase liquid source were analyzed for mass distributions and the relationships among various factors Such as dissolved BTEX mass, plume spreading, and depletions of electron acceptors or productions of Fe2+ and methane. Second, additional K realizations with the same mean but different variances and con-elation lengths were used to determine how the model responds to varying degrees of uncertainty in the K field. The methodology and insights are of general interest and applicable to fuet-hydrocarbon natural-attenuation sites. C1 Lawrence Berkeley Lab, Dept Geochem, Div Earth Sci, Berkeley, CA 94720 USA. Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA. Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM 87545 USA. RP Lu, GP (reprint author), Lawrence Berkeley Lab, Dept Geochem, Div Earth Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Zheng, Chunmiao/I-5257-2014 OI Zheng, Chunmiao/0000-0001-5839-1305 NR 34 TC 3 Z9 3 U1 1 U2 4 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD MAY PY 2005 VL 131 IS 5 BP 767 EP 776 DI 10.1061/(ASCE)0733-9372(2005)131:5(767) PG 10 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 921CZ UT WOS:000228743100010 ER PT J AU DeLapp, RC LeBoeuf, EJ Chen, J Gu, BH AF DeLapp, RC LeBoeuf, EJ Chen, J Gu, BH TI Advanced thermal characterization of fractionated natural organic matter SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; DIFFERENTIAL SCANNING CALORIMETRY; STRUCTURE-PROPERTY RELATIONSHIPS; DIELECTRIC-RELAXATION BEHAVIOR; MOLECULAR-DYNAMICS SIMULATIONS; GLASS-TRANSITION; HUMIC-ACID; STRUCTURAL RELAXATION; FULVIC-ACID; MACROMOLECULAR CHARACTERISTICS AB This work focuses on an experimental investigation of the thermodynamic properties of natural organic matter (NOM), and whether fractions of NOM possess the same thermodynamic characteristics as the whole NOM from which they are derived. Advanced thermal characterization techniques were employed to quantify thermal expansion coefficients (alpha), constant-pressure specific heat capacities (C(p)), and thermal transition temperatures (T(t)) of several aquatic-and terrestrial-derived NOM. For the first time, glass transition behavior is reported for a series of NOM fractions derived from the same whole aquatic or terrestrial source, including humic acid-, falvic acid-, and carbohydrate-based NOM, and a terrestrial humin. Thermal mechanical analysis (TMA), standard differential scanning calorimetry (DSC), and temperature-modulated differential scanning calorimetry (TMDSC) measurements revealed T(t) ranging from -87 degrees C for a terrestrial carbohydrate fraction to 62 degrees C for the humin fraction. The NOM generally followed a trend of increasing T(t) from carbohydrate to fulvic acid to humic acid to humin, and greater T(t) associated with terrestrial fractions relative to aquatic fractions, similar to that expected for macromolecules possessing greater rigidity and larger molecular weight. Many of the NOM samples also possessed evidence of multiple transitions, similar to beta and alpha transitions of synthetic macromolecules. The presence of multiple transitions in fractionated NOM, however, is not necessarily reflected in whole NOM, suggesting other potential influences in the thermal behavior of the whole NOM relative to fractionated NOM. Temperature-scanning X-ray diffraction studies of each NOM fraction confirmed the amorphous character of each sample through T(t). C1 Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37325 USA. Arizona Dept Agr, State Agr Lab, Phoenix, AZ 85009 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP LeBoeuf, EJ (reprint author), Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37325 USA. EM eugene.j.leboeuf@vanderbilt.edu RI Gu, Baohua/B-9511-2012 OI Gu, Baohua/0000-0002-7299-2956 NR 73 TC 12 Z9 12 U1 0 U2 7 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 USA SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD MAY-JUN PY 2005 VL 34 IS 3 BP 842 EP 853 DI 10.2134/jeq2004.0241 PG 12 WC Environmental Sciences SC Environmental Sciences & Ecology GA 928IM UT WOS:000229265000010 PM 15843647 ER PT J AU West, GB Brown, JH AF West, GB Brown, JH TI The origin of allometric scaling laws in biology from genomes to ecosystems: towards a quantitative unifying theory of biological structure and organization SO JOURNAL OF EXPERIMENTAL BIOLOGY LA English DT Review DE allometry; quarter-power scaling; laws of life; circulatory system; ontogenetic growth ID METABOLIC-RATE; BODY-SIZE; GENERAL-MODEL; STATISTICAL ARTIFACT; ENERGY-METABOLISM; ONTOGENIC GROWTH; TEMPERATURE; MAMMALS; MASS; BIRDS AB Life is the most complex physical phenomenon in the Universe, manifesting an extraordinary diversity of form and function over an enormous scale from the largest animals and plants to the smallest microbes and subcellular units. Despite this many of its most fundamental and complex phenomena scale with size in a surprisingly simple fashion. For example, metabolic rate scales as the 3/4-power of mass over 27 orders of magnitude, from molecular and intracellular levels up to the largest organisms. Similarly, time-scales (such as lifespans and growth rates) and sizes (such as bacterial genome lengths, tree heights and mitochondrial densities) scale with exponents that are typically simple powers of 1/4. The universality and simplicity of these relationships suggest that fundamental universal principles underly much of the coarse-grained generic structure and organisation of living systems. We have proposed a set of principles based on the observation that almost all life is sustained by hierarchical branching networks, which we assume have invariant terminal units, are space-filling and are optimised by the process of natural selection. We show how these general constraints explain quarter power scaling and lead to a quantitative, predictive theory that captures many of the essential features of diverse biological systems. Examples considered include animal circulatory systems, plant vascular systems, growth, mitochondrial densities, and the concept of a universal molecular clock. Temperature considerations, dimensionality and the role of invariants are discussed. Criticisms and controversies associated with this approach are also addressed. C1 Santa Fe Inst, Santa Fe, NM 87501 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA. RP Santa Fe Inst, 1399 Hyde Pk Rd, Santa Fe, NM 87501 USA. EM gbw@santafe.edu NR 52 TC 324 Z9 340 U1 16 U2 131 PU COMPANY OF BIOLOGISTS LTD PI CAMBRIDGE PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE CB4 4DL, CAMBS, ENGLAND SN 0022-0949 EI 1477-9145 J9 J EXP BIOL JI J. Exp. Biol. PD MAY PY 2005 VL 208 IS 9 BP 1575 EP 1592 DI 10.1242/jeb.01589 PG 18 WC Biology SC Life Sciences & Biomedicine - Other Topics GA 930YZ UT WOS:000229454300009 PM 15855389 ER PT J AU Fischer, PF Leaf, GK Restrepo, JM AF Fischer, PF Leaf, GK Restrepo, JM TI Influence of wall proximity on the lift and drag of a particle in an oscillatory flow SO JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID LINEAR SHEAR-FLOW; KEULEGAN-CARPENTER NUMBERS; CIRCULAR-CYLINDER; INERTIAL LIFT; SPHERE; FORCES; BOUNDARY AB We report on the lift and drag forces on a stationary sphere subjected to a wall-bounded oscillatory flow. We show how these forces depend on two parameters, namely, the distance between the particle and the bounding wall, and on the frequency of the oscillatory flow. The forces were obtained from numerical solutions of the unsteady incompressible Navier-Stokes equations. For the range of parameters considered, a spectral analysis found that the forces depended on a small number of degrees of freedom. The drag force manifested little change in character as the parameters varied On the other hand, the lift force varied significantly: We found that the lift force can have a positive as well as a negative time-averaged value, with an intermediate range of external forcing periods in which enhanced positive lift is possible. Furthermore, we determined that this force exhibits a viscous-dominated and a pressure-dominated range of parameters. C1 Univ Arizona, Dept Math, Tucson, AZ 85721 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Restrepo, JM (reprint author), Univ Arizona, Dept Math, Tucson, AZ 85721 USA. EM restrepo@math.arizona.edu OI Restrepo, Juan/0000-0003-2609-2882 NR 15 TC 6 Z9 7 U1 0 U2 6 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0098-2202 J9 J FLUID ENG-T ASME JI J. Fluids Eng.-Trans. ASME PD MAY PY 2005 VL 127 IS 3 BP 583 EP 594 DI 10.1115/1.1905647 PG 12 WC Engineering, Mechanical SC Engineering GA 940FL UT WOS:000230129000019 ER PT J AU An, K Halverson, HG Reifsnider, KL Case, SW McCord, MH AF An, K Halverson, HG Reifsnider, KL Case, SW McCord, MH TI Comparison of methodologies for determination of fracture strength of 8 mol % yttria-stabilized zirconia electrolyte materials SO JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY LA English DT Article DE fracture strength; yttria-stabilized zirconia; weibull analysis; pressure-on-ring; ball-on-ring; plate tensile ID BEHAVIOR AB The widely used yttria-stabilized zirconia (YSZ) electrolyte is subjected to thermal and external stresses under operation, so that the enhancement of the mechanical properties is an important issue in planar solid oxide fuel cells. Fracture strengths of 8 mol % YSZ electrolytes as 100 X 100 mm squire plates, 23 mm disks, and 17 mm disks were evaluated using plate tensile, ball-on-ring, and pressure-on-ring testing methodologies, respectively. Finite element analysis (FEA) was validated and used to calculate the stress distribution and peak stress for the biaxial strength tests. A Weibull analysis was carried out on the test/FEA-predicted peak stresses, and Weibull strength, modulus, and material scale parameters were found for each test methodology. The methodologies were compared and evaluated based on the results of the Weibull analysis; the pressure-on-ring test is preferred for brittle thin-film fracture strength testing. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Connecticut, Dept Mech Engn, Connecticut Global Fuel Cell Ctr, Storrs, CT 06269 USA. Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 USA. RP An, K (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM kean@vt.edu RI Case, Scott/C-2637-2009; An, Ke/G-5226-2011; OI An, Ke/0000-0002-6093-429X; Case, Scott/0000-0002-4802-1228 NR 14 TC 1 Z9 1 U1 0 U2 3 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 1550-624X J9 J FUEL CELL SCI TECH JI J. Fuel Cell Sci. Technol. PD MAY PY 2005 VL 2 IS 2 BP 99 EP 103 DI 10.1115/1.1867974 PG 5 GA 046XP UT WOS:000237844700004 ER PT J AU Mousseau, VA AF Mousseau, VA TI A fully implicit hybrid solution method for a two-phase thermal-hydraulic model SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article ID SYSTEMS; EQUATIONS AB This paper will present a hybrid solution algorithm for the two-phase flow equations coupled to wall heat conduction. The partial differential equations in the physical model are the same as in RELAP5. The hybrid solution algorithm couples two solution methods, the solution method currently employed by RELAP5 and an implicitly balanced solution method. The resulting hybrid solution method is both fast and accurate. Results will be presented that show when accuracy and CPU time are considered simultaneously that there are ranges when the hybrid solution algorithm is preferred over the RELAP5 solution method. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Fluid Dynam Grp, Los Alamos, NM 87545 USA. RP Mousseau, VA (reprint author), Los Alamos Natl Lab, Fluid Dynam Grp, T-3,MS-B216, Los Alamos, NM 87545 USA. EM vmss@lanl.gov NR 17 TC 9 Z9 9 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD MAY PY 2005 VL 127 IS 5 BP 531 EP 539 DI 10.1115/1.1865223 PG 9 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA 941AQ UT WOS:000230187400008 ER PT J AU Hubeny, VE Maloney, A Rangamani, M AF Hubeny, VE Maloney, A Rangamani, M TI String-corrected black holes SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE superstrings and heterotic strings; black holes in string theory ID N=2 SUPERGRAVITY THEORIES; MACROSCOPIC ENTROPY; AREA LAW; ATTRACTORS AB We investigate the geometry of four dimensional black hole solutions in the presence of stringy higher curvature corrections to the low energy effective action. For certain supersymmetric two charge black holes these corrections drastically alter the causal structure of the solution, converting seemingly pathological null singularities into timelike singularities hidden behind a finite area horizon. We establish, analytically and numerically, that the string-corrected two-charge black hole metric has the same Penrose diagram as the extremal four-charge black hole. The higher derivative terms lead to another dramatic effect - the gravitational force exerted by a black hole on an inertial observer is no longer purely attractive! The magnitude of this effect is related to the size of the compactification manifold. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. LBNL, Theoret Phys Grp, Berkeley, CA 94720 USA. Univ Calif Santa Barbara, KITP, Santa Barbara, CA 93105 USA. Stanford Univ, SLAC, Stanford, CA 94309 USA. Stanford Univ, Dept Phys, Stanford, CA 94309 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM veronika@berkeley.edu; maloney@slac.stanford.edu; mukund@socrates.berkeley.edu NR 25 TC 50 Z9 50 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD MAY PY 2005 IS 5 AR 35 PG 19 WC Physics, Particles & Fields SC Physics GA 931RJ UT WOS:000229502500035 ER PT J AU Sblattero, D Maurano, F Mazzarella, G Rossi, M Auricchio, S Florian, F Ziberna, F Tommasini, A Not, T Ventura, A Bradbury, A Marzari, R Troncone, R AF Sblattero, D Maurano, F Mazzarella, G Rossi, M Auricchio, S Florian, F Ziberna, F Tommasini, A Not, T Ventura, A Bradbury, A Marzari, R Troncone, R TI Characterization of the anti-tissue transglutaminase antibody response in nonobese diabetic mice SO JOURNAL OF IMMUNOLOGY LA English DT Article ID CELIAC-DISEASE; TISSUE TRANSGLUTAMINASE; FAB FRAGMENTS; NOD MICE; AUTOIMMUNE DISORDERS; REPERTOIRE CLONING; CELL-ACTIVATION; LYMPH-NODES; T-CELLS; PHAGE AB Type 1 diabetes mellitus is an autoimmune disorder characterized by destruction of insulin-producing pancreatic beta cells by T lymphocytes. in nonobese diabetic (NOD) mice, a role has been hypothesized for dietary gluten proteins in the onset of diabetes, and because gluten dependence is the major feature of celiac disease, together with production of Abs to the autoantigen tissue transglutaminase (tTG), we looked for the presence of anti-tTG Abs in the serum of NOD mice and, to establish their origin, analyzed the Ab repertoire of NOD mice using phage display Ab libraries. We found significant levels of serum anti-tTG Abs and were able to isolate single-chain Ab fragments to mouse tTG mainly from the Ab libraries made from intestinal lymphocytes and to a lesser extent from splenocytes. Data from NOD mice on a gluten-free diet suggest that the anti-tTG response is not gluten-dependent. The intestinal Ab response to tTG is a feature of NOD mice, but the underlying mechanisms remain obscure. C1 Univ Trieste, Dept Biol, I-34127 Trieste, Italy. CNR, Inst Food Sci & Technol, Avellino, Italy. Univ Naples Federico II, Dept Paediat, Naples, Italy. Univ Naples Federico II, European Lab Invest Food Induced Dis, Naples, Italy. Univ Trieste, Dept Sci Reprod & Dev, I-34127 Trieste, Italy. Ist Riconero & Cura & Carattere Sci Burlo Garofol, Trieste, Italy. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. RP Sblattero, D (reprint author), Univ Trieste, Dept Biol, Via Giorgieri 10, I-34127 Trieste, Italy. EM daniele@icgeb.org RI Rossi, Mauro/B-5930-2012; Maurano, Francesco/H-6487-2013; OI Maurano, Francesco/0000-0002-6780-8325; Ventura, Alessandro/0000-0002-4657-1760 NR 41 TC 11 Z9 12 U1 1 U2 1 PU AMER ASSOC IMMUNOLOGISTS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 0022-1767 J9 J IMMUNOL JI J. Immunol. PD MAY 1 PY 2005 VL 174 IS 9 BP 5830 EP 5836 PG 7 WC Immunology SC Immunology GA 919PU UT WOS:000228630800079 PM 15843587 ER PT J AU Chang, JH Exarhos, GJ Shin, YK AF Chang, JH Exarhos, GJ Shin, YK TI Biomimetic catalysis of tailored mesoporous materials with the self-assembled multifunctional monolayers SO JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY LA English DT Article DE mesoporous; catalysis; esters; self-assembly; silanes; wetting ID P-NITROPHENYL ALKANOATES; SUBSTRATE-SPECIFICITY; HYDROLYTIC CATALYZES; POLYMER; ENZYMES; SOLVOLYSIS; COPOLYMERS; IMIDAZOLE; ACETATE; SILICA AB This paper describes chemically functionalized mesoporous silica as a novel catalyst for the rapid hydrolysis of a phenyl ester. Our study demonstrates a very simple and flexible approach to controlling the surface reactivity on the nanometer scale using a self-assembled organic monolayer consisting of polar (dihydroxyl, carboxyl, ethylene-diamine, and dihydroimidazole), and non-polar (isobutyl) groups. All five functional groups are essential requirements for preparing an enzyme-like catalyst because of their synergistic effect and hydrophobic partitioning, which we verified through 13C CP-MAS solid state NMR spectroscopy. Catalytic activities were obtained from the catalytic efficiency constant and the specificity constant using Michaelis-Menten kinetics. Catalytic activities were close to those of a natural enzyme when 12% of the surface was covered by hydrophobic isobutyl silane. The rate of enzyme-catalyzed activity is dependent on the energy of the transition state, as defined in terms of an energy barrier derived from the relationship between the transfer free energy and the specificity constant. C1 Korea Inst Ceram Engn & Technol, Seoul 153801, South Korea. Pacific NW Natl Lab, Richland, WA 99352 USA. Chungbuk Natl Univ, Dept Chem, Cheongju 361753, Chungbuk, South Korea. RP Chang, JH (reprint author), Korea Inst Ceram Engn & Technol, Seoul 153801, South Korea. EM jhchang@kicet.re.kr NR 21 TC 3 Z9 3 U1 0 U2 4 PU KOREAN SOC INDUSTRIAL ENGINEERING CHEMISTRY PI SEOUL PA A-803 TWIN BLDG, 275-3, YANGJAE-DONG, SEOCHO-KU, SEOUL 137-130, SOUTH KOREA SN 1226-086X J9 J IND ENG CHEM JI J. Ind. Eng. Chem. PD MAY PY 2005 VL 11 IS 3 BP 375 EP 380 PG 6 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA 930HA UT WOS:000229405300008 ER PT J AU Keizer, TS Sauer, NN McCleskey, TM AF Keizer, TS Sauer, NN McCleskey, TM TI Beryllium binding at neutral pH: The importance of the Be-O-Be motif SO JOURNAL OF INORGANIC BIOCHEMISTRY LA English DT Article DE beryllium; citric acid; binding; binuclear ID AQUEOUS-SOLUTION; COORDINATION CHEMISTRY; COMPLEX-FORMATION; ALUMINUM CITRATE; MALONATE; OXALATE; DISEASE; ACIDS AB Beryllium speciation at physiological conditions is critical to understanding chronic beryllium disease (CBD). The MHC-class II receptor alleles that have been linked to CBD have more than six carboxylates in a short 20 amino acid segment of the binding pocket and it has been suggested that beryllium may bind within the MHC-class II receptor via the carboxylates. Previous reports also show that citric acid binds beryllium significantly stronger than similar carboxylate ligands such as tartaric acid and is one of the few ligands that can compete with hydrolysis to solubilize beryllium across the entire pH range at molar concentrations. We have characterized the binding of Be to citric acid and shown using a combination of NMR, mass spectrometry and ligand competition studies that Be2L and Be4L2 species dominate. A Be-O-Be linkage with the bridging oxygen coming from the aliphatic alcohol is critical to the stability of the complex. We show through competition experiments that the most stable Be-O-Be arrangement has one Be in a five-member ring and the other Be in a six-member ring. The unusual deprotonation of an aliphatic alcohol (pK(a) = 18) at neutral pH has significant ramifications on the potential interactions of Be with biological ligands such as carbohydrates and Ser and Thr residues. (c) 2005 Elsevier Inc. All rights reserved. C1 CSIC, Div Chem, Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP McCleskey, TM (reprint author), CSIC, Div Chem, Los Alamos Natl Lab, Mail Stop J514, Los Alamos, NM 87545 USA. EM tmark@lanl.gov RI McCleskey, Thomas/J-4772-2012 NR 26 TC 10 Z9 11 U1 0 U2 5 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0162-0134 J9 J INORG BIOCHEM JI J. Inorg. Biochem. PD MAY PY 2005 VL 99 IS 5 BP 1174 EP 1181 DI 10.1016/j.jinorgbio.2005.02.017 PG 8 WC Biochemistry & Molecular Biology; Chemistry, Inorganic & Nuclear SC Biochemistry & Molecular Biology; Chemistry GA 922ZU UT WOS:000228879200023 PM 15833341 ER PT J AU Yuan, ZY Li, LH Huang, JH Han, XG Wan, SQ AF Yuan, ZY Li, LH Huang, JH Han, XG Wan, SQ TI Effect of nitrogen supply on the nitrogen use efficiency of an annual herb, Helianthus annuus L. SO JOURNAL OF INTEGRATIVE PLANT BIOLOGY LA English DT Article DE mean residence time; nitrogen productivity; nitrogen supply; nitrogen use efficiency; plant strategies ID NUTRIENT-USE EFFICIENCY; MINERAL-NUTRITION; WILD PLANTS; AVAILABILITY; FOREST; PRODUCTIVITY; RESORPTION; FERTILITY; STANDS AB Nitrogen use efficiency (NUE) is the product of nitrogen productivity (NP) and the mean residence time of nitrogen (MRT). Theory suggests that there should be a trade-off between both components, but direct experimental evidence is still scarce. To test this hypothesis, we analyzed the effect of varying nitrogen supply levels on NUE and its two components (NP, MRT) in Helianthus annuus L., an annual herb. The plants investigated were subjected to six nitrogen levels (0, 2, 4, 8, 16, and 32 g N/m(2)). Total plant production increased substantially with increasing nitrogen supply. Nitrogen uptake and loss also increased with nitrogen supply. Nitrogen influx (r(in)) and outflux (r(out)) were defined as the rates of nitrogen uptake and loss per unit aboveground nitrogen, respectively. Both r(in) and r(out) increased with increasing nitrogen supply. In addition, rin was far higher than ro,,,. Consequently, the relative rate of nitrogen increment (r(in) - r(out)) also increased with nitrogen supply. There were marked differences between treatments with respect to parameters related to the stress resistance syndrome: nitrogen pool size, leaf nitrogen concentration, and net aboveground productivity increased with nitrogen supply. Plants at high nitrogen levels showed a higher NP (the growth rate per unit aboveground nitrogen) and a shorter MRT (the inverse of r(out)), whereas plants at low nitrogen levels displayed the reverse pattern. Shorter MRT for plants at high nitrogen levels was caused by the abscission of leaves that contained relatively large fractions of total plant nitrogen. We found a negative relationship between NP and MRT, the components of NUE, along the gradient of nitrogen availability, suggesting that there was a trade-off between NP and MRT. The NUE increased with increasing nitrogen availability, up to a certain level, and then decreased. These results offer support for the hypothesis that adaptation to infertile habitats involves a low nitrogen loss (long MRT in the plant) rather than a high NUE per se. The higher NUE at the plant level was a result, in part, of greater nitrogen resorption during senescence. We suggest that a long MRT (an index of nitrogen conservation) is a potentially successful strategy in nitrogen-poor environments. C1 Chinese Acad Sci, Inst Bot, Lab Quantitat Vegetat Ecol, Beijing 100093, Peoples R China. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Han, XG (reprint author), Chinese Acad Sci, Inst Bot, Lab Quantitat Vegetat Ecol, Beijing 100093, Peoples R China. EM xghan@ibcas.ac.cn RI Han, Xingguo/B-3980-2012; Wan, Shiqiang/B-5799-2009; Han, Xingguo/K-7552-2016 OI Han, Xingguo/0000-0002-1836-975X NR 39 TC 6 Z9 8 U1 2 U2 28 PU BLACKWELL PUBLISHING ASIA PI CARLTON PA 54 UNIVERSITY ST, P O BOX 378, CARLTON, VICTORIA 3053, AUSTRALIA SN 1672-9072 J9 J INTEGR PLANT BIOL JI J. Integr. Plant Biol. PD MAY PY 2005 VL 47 IS 5 BP 539 EP 548 DI 10.1111/j.1744-7909.2005.00006.x PG 10 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA 929IC UT WOS:000229336000004 ER PT J AU Ozcelik, S Atay, NZ AF Ozcelik, S Atay, NZ TI Optical transition rates of a meso-substituted thiacarbocyanine in methanol-in-oil reverse micelles SO JOURNAL OF LUMINESCENCE LA English DT Article DE enhanced fluorescence; cyanine dyes; reverse micelles; methanol-in-oil-droplet; spatial confinement ID INTRAMOLECULAR CHARGE-TRANSFER; SOLVATION DYNAMICS; NONAQUEOUS MICROEMULSIONS; EXCITED-STATE; POLAR-SOLVENTS; PHASE-BEHAVIOR; AEROSOL-OT; DYES; MOLECULES; IODIDE AB We report the photophysical properties of'3,3'-diethyl-5,5'-dichloro-9-phenylthiacai-bocyanine (DDPT) in methanol-in-oil (m/o) reverse micellar systems which form methanol droplets stabilized with anionic surfactant aerosol-OT (AOT) in n-heptane. The fluorescence quantum yield of DDPT is enhanced by a factor of 17 in the methanol droplet in comparison with bulk methanol, The fluorescence lifetimes of DDPT in m/o reverse micelles are prolonged up to 2.2 ns with increasing molar ratio of methanol to surfactant (w(0) [MeOH]/[AOT]), whereas the fluorescence lifetime of DDPT in bulk methanol is 75 ps. The non-radiative rate constants of DDPT in the droplets are decreased by a factor of 40, resulting in a remarkable enhancement in quantum yields, indicating that internal motions of DDPT in the droplets are significantly reduced due to strong electrostatic interactions between the positively charged DDPT and the negatively charged sulfonate head-groups of AOT and. the spatial confinement induced by the reverse micellar structure. (c) 2004 Elsevier B.V. All rights reserved. C1 Bilkent Univ, Dept Chem, TR-06533 Bilkent, Turkey. Bogazici Univ, Dept Chem, TR-80815 Bebek, Turkey. RP Ozcelik, S (reprint author), Pacific Northwest Natl Lab, Div Chem Sci, 3335 Q Ave,EMSL,K8-88, Richland, WA 99352 USA. EM serdar.ozcelik@pnl.gov RI Ozcelik, Serdar/S-4518-2016; OI Ozcelik, Serdar/0000-0003-2029-0108 NR 36 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2313 J9 J LUMIN JI J. Lumines. PD MAY PY 2005 VL 113 IS 1-2 BP 1 EP 8 DI 10.1016/j.jlumin.2014.07.009 PG 8 WC Optics SC Optics GA 930JX UT WOS:000229413200001 ER PT J AU Hai, NH Lemoine, R Remboldt, S Strand, M Shield, JE Schmitter, D Kraus, RH Espy, M Leslie-Pelecky, DL AF Hai, NH Lemoine, R Remboldt, S Strand, M Shield, JE Schmitter, D Kraus, RH Espy, M Leslie-Pelecky, DL TI Iron and cobalt-based magnetic fluids produced by inert gas condensation SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE ferrofluids; inert-gas condensation; nanoparticles; iron; cobalt; synthesis ID CLUSTER GUN; NANOPARTICLES AB Iron and cobalt nanoparticle fluids have been prepared by inert-gas condensation into an oil/surfactant mixture. Superparamagnetic iron fluids (mean particle size = 11.6 +/- 0.4 nm) and ferromagnetic cobalt fluids (mean particle size = 51.6 +/- 3.4 nm) produced by this technique are promising candidates for magnetic targeting and hyperthermia applications. (c) 2005 Published by Elsevier B.V. C1 Univ Nebraska, Ctr Mat Res & Anal, Dept Phys & Astron, Lincoln, NE 68588 USA. Univ Nebraska, Ctr Mat Res & Anal, Dept Mech Engn, Lincoln, NE 68588 USA. Los Alamos Natl Lab, Biophys Grp, Los Alamos, NM 87545 USA. Pius X High Sch, Lincoln, NE 68510 USA. RP Leslie-Pelecky, DL (reprint author), Univ Nebraska, Ctr Mat Res & Anal, Dept Phys & Astron, Lincoln, NE 68588 USA. EM diandra2@unl.edu NR 11 TC 20 Z9 20 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 SI SI BP 75 EP 79 DI 10.1016/j.jmmm.2005.01.046 PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400013 ER PT J AU Kaminski, MD Rosengart, AJ AF Kaminski, MD Rosengart, AJ TI Detoxification of blood using injectable magnetic nanospheres: A conceptual technology description SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE nanospheres; detoxification; blood borne toxins; radionuclide extraction; magnetic filter; long-circulating nanospheres; polyethylene glycol (PEG); poly(lactic acid) AB We describe injectable magnetic nanospheres as a vehicle for selective detoxification of blood borne toxins. Surface receptors on the freely circulating nanospheres bind to toxins. A hand-held extracorporeal magnetic filter separates the toxin-loaded nanospheres from the clean blood, which is returned to the patient. Details of the technology concept are given and include a state-of-knowledge and research needs. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Chicago, Argonne Natl Lab, Div Chem Engn, Nanoscale Engn Grp, Argonne, IL 60439 USA. Univ Chicago, Neurosci Crit Care & Acute Stroke Program, Dept Neurol, Chicago, IL 60637 USA. Univ Chicago, Neurosci Crit Care & Acute Stroke Program, Dept Neurosurg, Chicago, IL 60637 USA. Pritzker Sch Med, Chicago, IL 60637 USA. RP Kaminski, MD (reprint author), Univ Chicago, Argonne Natl Lab, Div Chem Engn, Nanoscale Engn Grp, 9700 S Cass Ave, Argonne, IL 60439 USA. EM kaminski@cmt.anl.gov NR 14 TC 23 Z9 23 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 SI SI BP 398 EP 403 DI 10.1016/j.jmmm.2005.02.055 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400063 ER PT J AU Mertz, CJ Kaminski, MD Xie, YM Finck, MR Guy, S Rosengart, AJ AF Mertz, CJ Kaminski, MD Xie, YM Finck, MR Guy, S Rosengart, AJ TI In vitro studies of functionalized magnetic nanospheres for selective removal of a simulant biotoxin SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE detoxification; toxin; horseradish peroxidase; biotin; streptavidin; nanospheres; microspheres; magnetic separation; PLA-PEG; biodegradable ID NANOPARTICLES; BIOMEDICINE AB In this study, the simulant biotoxin (biotinylated horseradish peroxidase) was efficiently removed from simple electrolyte solutions and blood using a highly selective complexation reaction (biotin-avidin). Sequestration of the biotoxin is realized with streptavidin-functionalized magnetic nanoparticles that selectively capture the biotoxin. Quantitative removal of the model toxin is achieved using an external magnetic field to trap the toxin-bound particles. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Engn, Nanoscale Engn Grp, Argonne, IL 60439 USA. Univ Chicago, Neurocrit Care & Acute Stroke Program, Dept Neurol, Chicago, IL 60637 USA. Univ Chicago, Neurocrit Care & Acute Stroke Program, Dept Neurosurg, Chicago, IL 60637 USA. Univ Chicago, Pritzker Sch Med, Chicago, IL 60637 USA. RP Mertz, CJ (reprint author), Argonne Natl Lab, Div Chem Engn, Nanoscale Engn Grp, 9700 S Cass Ave,CMT-205, Argonne, IL 60439 USA. EM mertz@cmt.anl.gov NR 10 TC 15 Z9 15 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 BP 572 EP 577 DI 10.1016/j.jmmm.2005.01.075 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400087 ER PT J AU Pekas, N Granger, M Tondra, M Popple, A Porter, MD AF Pekas, N Granger, M Tondra, M Popple, A Porter, MD TI Magnetic particle diverter in an integrated microfluidic format SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE micromagnetic system; microfluidics; lab-on-a-chip; diverter; flow; Y-shaped junction; magnetic separation ID MICROBEADS; SYSTEMS; DESIGN; BEADS AB A fully integrated micromagnetic particle diverter and microfluidic system are described. Particles are diverted via an external uniform magnetic field perturbed at the microscale by underlying current straps. The resulting magnetic force deflects particles across a flow stream into one of the two channels at a Y-shaped junction. The basic theoretical framework, design, and operational demonstration of the device are presented. (c) 2005 Published by Elsevier B.V. C1 Iowa State Univ, Dept Chem, Inst Combinatorial Discovery, Ames, IA 50010 USA. Iowa State Univ, Dept Chem Engn, Ames, IA 50010 USA. Iowa State Univ, USDOE, Ames Lab, Ames, IA 50010 USA. NVE Corp, Eden Prairie, MN 55344 USA. RP Porter, MD (reprint author), Iowa State Univ, Dept Chem, Inst Combinatorial Discovery, 42 Spedding Hall, Ames, IA 50010 USA. EM mporter@porter1.ameslab.gov RI Pekas, Nikola/D-7349-2012; OI Granger, Michael/0000-0002-2385-6413 NR 14 TC 46 Z9 46 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 SI SI BP 584 EP 588 DI 10.1016/j.jmmm.2005.01.077 PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400089 ER PT J AU Aviles, MO Ebner, AD Chen, HT Rosengart, AJ Kaminski, MD Ritter, JA AF Aviles, MO Ebner, AD Chen, HT Rosengart, AJ Kaminski, MD Ritter, JA TI Theoretical analysis of a transdermal ferromagnetic implant for retention of magnetic drug carrier particles SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE magnetic drug targeting; drug delivery; magnetic wire; high gradient magnetic separation; circulatory system; magnetic implant; simulation; blood flow; model ID CAROTID BIFURCATION; DELIVERY; CAPTURE; ARTERY AB The use of a ferromagnetic wire implant placed near an artery to assist the collection of magnetic drug carrier particles (MDCPs) using an external magnet is theoretically studied. Three magnetic drug targeting (MDT) systems are evaluated in terms of their MDCP collection efficiency (CE): a permanent magnet and wire is better than a permanent magnet alone, which is better than a homogeneous magnetic field and wire. (c) 2005 Published by Elsevier B.V. C1 Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA. Univ Chicago, Pritzker Sch Med, Dept Neurol, Chicago, IL 60637 USA. Univ Chicago, Pritzker Sch Med, Dept Surg Neurosurg, Chicago, IL 60637 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. RP Ritter, JA (reprint author), Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA. EM ritter@engr.sc.edu NR 16 TC 52 Z9 54 U1 0 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 SI SI BP 605 EP 615 DI 10.1016/j.jmmm.2005.01.089 PG 11 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400092 ER PT J AU Chen, HT Ebner, AD Kaminski, MD Rosengart, AJ Ritter, JA AF Chen, HT Ebner, AD Kaminski, MD Rosengart, AJ Ritter, JA TI Analysis of magnetic drug carrier particle capture by a magnetizable intravascular stent-2: Parametric study with multi-wire two-dimensional model SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE magnetic drug targeting; stent; drug delivery; magnetic drug delivery; magnetic microspheres; high-gradient magnetic separation; magnetic fields; circulatory system; blood flow; magnetic implant; simulation ID SEPARATION AB A 2-D mathematical model was developed and used to examine the capture of magnetic drug carrier particles (MDCPs) by a magnetizable intravascular stent (MIS). The roles of both non-stent system parameters, i.e., the blood flow rate, magnetic field strength and direction and MDCP properties, and stent design parameters, i.e., the MIS radius, its wire radius, number of MIS loops, interwire loop spacing and MIS ferromagnetic material were evaluated over a wide range of plausible conditions. The results showed that the MIS could be a very effective magnetic drug targeting too] with many possible applications. (c) 2005 Published by Elsevier B.V. C1 Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA. Univ Chicago, Pritzker Sch Med, Dept Neurol, Chicago, IL 60637 USA. Univ Chicago, Pritzker Sch Med, Dept Surg Neurosurg, Chicago, IL 60637 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. RP Ritter, JA (reprint author), Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA. EM ritter@engr.sc.edu NR 11 TC 60 Z9 63 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 SI SI BP 616 EP 632 DI 10.1016/j.jmmm.2005.01.080 PG 17 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400093 ER PT J AU Rosengart, AJ Kaminski, MD Chen, HT Caviness, PL Ebner, AD Ritter, JA AF Rosengart, AJ Kaminski, MD Chen, HT Caviness, PL Ebner, AD Ritter, JA TI Magnetizable implants and functionalized magnetic carriers: A novel approach for noninvasive yet targeted drug delivery SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 5th International Conference on Scientific and Clinical Applications of Magnetic Carriers CY MAY 20-22, 2004 CL Lyon, FRANCE DE biomedical application; magnetic drug targeting; magnetic implant; seeds; stent; blood flow; clinical applications AB We describe a targeted drug delivery system consisting of two steps: first, intravenous injection and circulation of biocompatible, magnetic nanospheres encapsulated with a drug; and second, focal concentration and release of the drug at the target site utilizing an implanted, magnetizable intraluminal stent or seed. We introduce the system concept, outline the biomedical feasibility, and discuss potential clinical advantages. (c) 2005 Published by Elsevier B.V. C1 Univ Chicago, Dept Neurol, Chicago, IL 60637 USA. Univ Chicago, Dept Surg Neurosurg, Chicago, IL 60637 USA. Univ Chicago, Pritzker Sch Med, Chicago, IL 60637 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. Univ S Carolina, Dept Chem Engn, Swearingen Engn Ctr, Columbia, SC 29208 USA. RP Rosengart, AJ (reprint author), Univ Chicago, Dept Neurol, 5841 S Maryland Ave, Chicago, IL 60637 USA. EM arosenga@neurology.bsd.uchicago.edu NR 23 TC 51 Z9 54 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD MAY 1 PY 2005 VL 293 IS 1 SI SI BP 633 EP 638 DI 10.1016/j.jmmm.2005.01.087 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 933VQ UT WOS:000229661400094 ER PT J AU Ryu, HS Lee, JK Kim, H Hong, KS AF Ryu, HS Lee, JK Kim, H Hong, KS TI New type of bioactive materials: Hydroxyapatite/alpha-wollastonite composites SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CALCIUM-PHOSPHATE CERAMICS; SIMULATED BODY-FLUID; MECHANICAL-PROPERTIES; BONE TISSUE; APATITE; SURFACE; HYDROXYLAPATITE; MICROSTRUCTURE; BIOCERAMICS; POWDERS AB A new type of bioactive materials, hydroxyapatite (HA)/alpha-wollastonite (alpha-Wol) composites, were prepared. The sintering behavior, phase evolution, and in vitro bioactivity of hydroxyapatite/alpha-wollastonite composites were examined. The properties of HA/alpha-Wol composites were quite different from those of HA ceramics or alpha-Wol ceramics. HA/alpha-Wol composites sintered 1300 degrees C for 2 h exhibited a dense microstructure consisting of grains in the range of 0.3-1.0 mu m in diameter. During sintering, a complex phase evolution between HA and alpha-Wol was observed. At 1300 degrees C, the formation of the Si substituted HA and the additional alpha-tricalcium phosphate (TCP) were observed using Fourier transform infrared and x-ray diffraction analysis. Further heat treatment at 1350 degrees C transformed part of the HA and alpha-Wol into a new phase with the composition: Ca12P6Si2O31. The in vitro bioactivity of the HA/alpha-Wol composites with a weight ratio of 25:75 and 50:50 sintered at 1300 degrees C was better than that of alpha-Wol monophasic ceramics. This result revealed that the silica of alpha-Wol and the orthosilicate of Si substituted HA provided nucleation sites for the bonelike apatite layer. The phosphate present in the HA or alpha-TCP phases promoted the nucleation of a bonelike apatite layer on the surface of the composites. The dissolution rate of alpha-Wol phase in simulated body fluid was faster than alpha-TCP or HA phase. Therefore, HA/alpha-Wol composite is the bone replacement material of controllable bioactivity and degradation rate with relative content between HA and alpha-Wol phase. C1 Daewoong Pharmaceut Co Ltd, Seoul 135715, South Korea. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151742, South Korea. RP Hong, KS (reprint author), Daewoong Pharmaceut Co Ltd, Seoul 135715, South Korea. EM kshongss@plaza.snu.ac.kr NR 33 TC 7 Z9 7 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAY PY 2005 VL 20 IS 5 BP 1154 EP 1163 DI 10.1557/JMR.2005.0144 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA 928TD UT WOS:000229293700012 ER PT J AU Yu, R Zhang, XF He, LL Ye, HQ AF Yu, R Zhang, XF He, LL Ye, HQ TI Topology of charge density and elastic anisotropy of Ti3SiC2 polymorphs SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID AB-INITIO CALCULATIONS; TRANSITION-METALS; CONSTANTS; SI AB Using an all-electron, full potential first-principles method, we have investigated the topology of charge density and elastic anisotropy of Ti3SiC2 polymorphs comparatively. By analyzing the charge density topology, it was found that the Ti-Si bonds are weaker in beta than in alpha, resulting in a destabilizing effect and lower Young's modulus in directions between a and c axes for beta. On the other hand, the Si-C bonds (absent in alpha) are formed in beta in the c direction. The formation of the Si-C bonds not only mitigates the destabilizing effect of the weaker Ti-Si bonds, but also results in larger Young's modulus in the c direction. In contrast to the high elastic anisotrophy, the elastic anisotropy of Ti3SiC2 is very low. C1 Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Met Res Inst, Shenyang 110016, Peoples R China. RP Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM ryu@lbl.gov RI Yu, Rong/A-3011-2008 OI Yu, Rong/0000-0003-1687-3597 NR 30 TC 22 Z9 23 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0884-2914 EI 2044-5326 J9 J MATER RES JI J. Mater. Res. PD MAY PY 2005 VL 20 IS 5 BP 1180 EP 1185 DI 10.1557/JMR.2005.0145 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 928TD UT WOS:000229293700015 ER PT J AU Holesinger, TG Arendt, PN Feenstra, R Gapud, AA Specht, ED Feldmann, DM Larbalestier, DC AF Holesinger, TG Arendt, PN Feenstra, R Gapud, AA Specht, ED Feldmann, DM Larbalestier, DC TI Liquid mediated growth and the bimodal microstructure of YBa2Cu3O7-delta films made by the ex situ conversion of physical vapor deposited BaF2 precursors SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CRITICAL-CURRENT DENSITY; YBCO COATED CONDUCTORS; THIN-FILMS; METALORGANIC DEPOSITION; CRITICAL CURRENTS; TEMPERATURE SUPERCONDUCTORS; TRIFLUOROACETATE PRECURSORS; TRANSPORT-PROPERTIES; BUFFER LAYERS; TAPES AB YBa2Cu3Oy (YBCO) films produced by the ex situ conversion of BaF2-based precursors deposited by physical vapor deposition on ion-beam assisted deposited (IBAD) yttrium-stabilized zirconia (YSZ) and rolling-assisted biaxially textured substrates (RABiTS) templates are characterized by a bi-axially aligned, laminar grain structure that results from the anisotropic growth characteristics of the YBCO phase and its precipitation from a transient liquid phase during the conversion process. A bimodal microstructure characterizes these films and is defined by large, well-formed YBCO grains with Y2O3 precipitates in the bottom region of the film and small YBCO grains with a high density of stacking faults in the upper half. Ba2Cu3Oy or Ba-O-F/CuO second phase layers were often found between large YBCO grains in the bottom half of the films. YBCO grain sizes exceeded 50 p,m within the plane of the film in some cases. Conversely, discrete secondary phases of Y2Cu2O5, Y2O3, and Ba2Cu3Oy/Ba-O-F could be found among the much smaller YBCO grains in the top portion of the bimodal structure. The dividing line of the bimodal structure was generally at one half of the film thickness, although exceptions to this trend were found. The highest critical current densities (J(c)) and best film alignments for a given film thickness were found in samples where the layers of Ba2Cu3Oy or Ba-O-F were minimized or eliminated from the films. Samples quenched after partial conversion show the segregation of CuO to the top region of the film and the lateral growth of large YBCO grains from a precursor mix of Y2Cu2O5 and Ba-O-F. The data demonstrate that transient liquid phases are part of the conversion process of BaF2-based YBCO films. The control of both CuO segregation and the amount of liquid phases generated during the initial stages of phase formation is needed for optimizing the ex situ conversion process for high-J(c) coated conductors. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Holesinger, TG (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM holesinger@lanl.gov RI Larbalestier, David/B-2277-2008; Specht, Eliot/A-5654-2009; OI Larbalestier, David/0000-0001-7098-7208; Specht, Eliot/0000-0002-3191-2163; Gapud, Albert/0000-0001-9048-9230 NR 54 TC 30 Z9 30 U1 0 U2 4 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAY PY 2005 VL 20 IS 5 BP 1216 EP 1233 DI 10.1557/JMR/2005.0150 PG 18 WC Materials Science, Multidisciplinary SC Materials Science GA 928TD UT WOS:000229293700019 ER PT J AU Williams, JR Wang, CM Chambers, SA AF Williams, JR Wang, CM Chambers, SA TI Heteroepitaxial growth and structural analysis of epitaxial alpha-Fe2O3(10(1)over-bar-0) on TiO2(001) SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID MOLECULAR-BEAM EPITAXY; THIN-FILMS; SURFACE; OXIDES AB We grew epitaxial alpha-Fe2O3(10 (1) over bar0) on TiO2(001) rutile by oxygen plasma-assisted molecular-beam epitaxy. High-resolution transmission electron microscopy (HRTEM), reflection high-energy electron diffraction (RHEED), and x-ray diffraction pole figures confirm that the film is composed of four different in-plane orientations rotated by 90 relative to one another. For a given Fe2O3 unit cell, the lattice mismatch along the parallel [0001](Fe2O3) and [100](TiO2) directions is nominally +67%. However, due to a 3-fold repetition of the slightly distorted square symmetry of anion positions within the Fe2O3 unit cell, there is a coincidental anion alignment along the [0001](Fe2O3) and [100](TiO2) directions, which results in an effective lattice mismatch of only -0.02% along this direction. The lattice mismatch is nearly 10% in the orthogonal [11 (2) over bar0](Fe2O3) and [100](TiO2). directions. The film is highly ordered and well registered to the substrate despite a large lattice mismatch in one direction. The film grows in registry with the substrate along the parallel [0001](Fe2O3). and [100](TiO2) directions and nucleates dislocations along the orthogonal [11 (2) over bar0](Fe2O3) [100](TiO2) directions. C1 Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. RP Chambers, SA (reprint author), Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. EM sa.chambers@pnl.gov NR 16 TC 3 Z9 3 U1 1 U2 11 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAY PY 2005 VL 20 IS 5 BP 1250 EP 1256 DI 10.1557/JMR.2005.0164 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA 928TD UT WOS:000229293700022 ER PT J AU Saraf, L Wang, CM Shutthanandan, V Zhang, Y Marina, O Baer, DR Thevuthasan, S Nachimuthu, P Lindle, DW AF Saraf, L Wang, CM Shutthanandan, V Zhang, Y Marina, O Baer, DR Thevuthasan, S Nachimuthu, P Lindle, DW TI Oxygen transport studies in nanocrystalline ceria films SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID SURFACE EXCHANGE; THIN-FILMS; OXIDE-ION; DIFFUSION; CONDUCTORS; DEPOSITION; REDUCTION; MOBILITY; REGION AB Oxygen uptake and conductivity were measured by nuclear-reaction analysis and alternating current impedance technique at the intermediate temperature range on sol-gel grown nanocrystalline ceria films with average grain-sizes 7 nm and 38 nm synthesized at 723 and 1173 K, respectively. Higher oxygen uptake and lower ionic conductivity were observed in ceria films with similar to 7-nm grain size. High permeation-assisted oxygen diffusion in nanocrystallites combined with oxygen trapping in the disordered region contributed to higher oxygen uptake. However, the lower ionic conductivity in the film resulted from the absence of long-range lattice ordering and inactive grain-boundary/surface oxygen vacancy sites due to oxygenation. The relationship between oxygen uptake and conductivity in ceria is discussed in details by considering grain-size dependent defect density, related surface area, and enhanced oxygen mobility. C1 Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. Pacific NW Natl Lab, Energy Sci & Technol Div, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Saraf, L (reprint author), Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. EM Laxmikant.Saraf@pnl.gov RI Baer, Donald/J-6191-2013 OI Baer, Donald/0000-0003-0875-5961 NR 33 TC 26 Z9 26 U1 0 U2 10 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAY PY 2005 VL 20 IS 5 BP 1295 EP 1299 DI 10.1557/JMR.2005.0157 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA 928TD UT WOS:000229293700027 ER PT J AU Webb, EB Hoyt, JJ Grest, GS Heine, DR AF Webb, EB Hoyt, JJ Grest, GS Heine, DR TI Atomistic simulations of reactive wetting in metallic systems SO JOURNAL OF MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 4th International Conference on High Temperature Capillarity CY MAR 31-APR 03, 2004 CL Sanremo, ITALY SP Mat Res Soc, Italian Inst Welding, Genova 2004 European Capital Culture, Provincia Imperia, Osaka Univ, NEDO Int Joint Res, Joining & Welding Res Inst, Azienda Promoz Turist Riviera Fiori, Casino Sanremo, Ctr Excellence Solidificat Undercooled Melts ZEUD DLR, Comm Montana Intemelia ID EMBEDDED-ATOM-METHOD; MOLECULAR-DYNAMICS; KINETICS; DROPS; CU; SURFACES; SUBSTRATE; ALLOYS; SCALE; GLASS AB Atomistic simulations were performed to investigate high temperature wetting phenomena for metals. A sessile drop configuration was modeled for two systems: Ag(I) on Cu and Pb(I) on Cu. The former case is an eutectic binary and the wetting kinetics were greatly enhanced by the presence of aggressive interdiffusion between Ag and Cu. Wetting kinetics were directly dependent upon dissolution kinetics. The dissolution rate was nearly identical for Ag(I) on Cu(1100) compared to Cu(111); as such, the spreading rate was very similar on both surfaces. Pb and Cu are bulk immiscible so spreading of Pb(I) on Cu occurred in the absence of significant substrate dissolution. For Pb(l) on Cu(111) a precursor wetting film of atomic thickness emerged from the partially wetting liquid drop and rapidly covered the surface. For Pb(l) on Cu(100), a foot was also observed to emerge from a partially wetting drop; however, spreading kinetics were dramatically slower for Pb(l) on Cu(100) than on Cu(111). For the former, a surface alloying reaction was observed to occur as the liquid wet the surface. The alloying reaction was associated with dramatically decreased wetting kinetics on Cu(100) versus Cu(111), where no alloying was observed. These two cases demonstrate markedly different atomistic mechanisms of wetting where, for Ag(l) on Cu, the dissolution reaction is associated with increased wetting kinetics while, for Pb(l) on Cu, the surface alloying reaction is associated with decreased wetting kinetics. (C) 2005 Springer Science + Business Media, Inc. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Webb, EB (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM ebwebb@sandia.gov NR 39 TC 13 Z9 14 U1 1 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAY PY 2005 VL 40 IS 9-10 BP 2281 EP 2286 DI 10.1007/s10853-005-1946-3 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 934ZL UT WOS:000229748000028 ER PT J AU Loehman, RE Hosking, FM Gauntt, B Kotula, PG Lu, P AF Loehman, RE Hosking, FM Gauntt, B Kotula, PG Lu, P TI Reactions of Hf-Ag and Zr-Ag alloys with Al2O3 at elevated temperatures SO JOURNAL OF MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 4th International Conference on High Temperature Capillarity CY MAR 31-APR 03, 2004 CL Sanremo, ITALY SP Mat Res Soc, Italian Inst Welding, Genova 2004 European Capital Culture, Provincia Imperia, Osaka Univ, NEDO Int Joint Res, Joining & Welding Res Inst, Azienda Promoz Turist Riviera Fiori, Casino Sanremo, Ctr Excellence Solidificat Undercooled Melts ZEUD DLR, Comm Montana Intemelia AB We are studying reactions of Ti, V, Zr, and Hf with ceramics as part of a program to understand fundamental reaction and bonding mechanisms in active metal brazing of ceramics. In this paper we present results of experiments with model systems comprising Ag alloys that contain different amounts of Hf or Zr that were reacted with sapphire or 99.6% alumina for different times and temperatures in a controlled atmosphere furnace. In these alloys the Ag functions as an inert solvent, which allowed us systematically to determine the effects of changes in concentration of the active element. We observed qualitative wetting and spreading tendencies of the alloys during heating and examined cross sections after cooling using electron analytical techniques. For all reaction times studied, the Hf/Ag alloys formed a discontinuous reaction layer, which was consistent with earlier high-resolution electron microscopy that showed sub-micrometer HfO2 particles embedded in the surfaces of the Al2O3 grains. By contrast, initial reaction of the Zr/Ag alloys with Al2O3 produced a continuous interface layer. With longer reaction times, the ZrO2 reaction product became much thicker and exhibited three distinct zones at the interface. The results suggest that the rate limiting step in the Zr/Ag reaction is the chemical reaction at the interface, whereas with Hf/Ag reaction diffusion of products away from the interface is rate limiting. (C) 2005 Springer Science + Business Media, Inc. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. New Mexico Inst Min & Technol, Socorro, NM 87801 USA. RP Loehman, RE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM loehman@sandia.gov RI Kotula, Paul/A-7657-2011 OI Kotula, Paul/0000-0002-7521-2759 NR 16 TC 14 Z9 14 U1 0 U2 10 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAY PY 2005 VL 40 IS 9-10 BP 2319 EP 2324 DI 10.1007/s10853-005-1952-5 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 934ZL UT WOS:000229748000034 ER PT J AU Weil, KS Kim, JY Hardy, JS AF Weil, KS Kim, JY Hardy, JS TI Interfacial analysis of (La0.6Sr0.4) (Co0.2Fe0.8)O3-delta substrates wetted by Ag-CuO SO JOURNAL OF MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 4th International Conference on High Temperature Capillarity CY MAR 31-APR 03, 2004 CL Sanremo, ITALY SP Mat Res Soc, Italian Inst Welding, Genova 2004 European Capital Culture, Provincia Imperia, Osaka Univ, NEDO Int Joint Res, Joining & Welding Res Inst, Azienda Promoz Turist Riviera Fiori, Casino Sanremo, Ctr Excellence Solidificat Undercooled Melts ZEUD DLR, Comm Montana Intemelia ID PEROVSKITES; CERAMICS; SYSTEMS; ALLOYS AB The wetting of (La0.6Sr0.4)(Co0.2Fe0.8)O3-delta substrates by Ag-CuO was investigated using the standard sessile drop technique, followed by metallographic examination of the quenched specimens. The addition of CuO substantially improves the wetting of these substrates by silver. The largest improvements in contact angle are observed at low CuO-content, apparently through the formation of a homogeneous silver-copper oxide liquid at the area of sessile drop/substrate contact. At a critical composition of x(CuO) similar to 8 mol% the mechanism of wetting changes, undergoing a transition initiated by the formation of two immiscible liquids within the molten sessile drop. (C) 2005 Springer Science + Business Media, Inc. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Weil, KS (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM scott.weil@pnl.gov RI Hardy, John/E-1938-2016 OI Hardy, John/0000-0002-1699-3196 NR 15 TC 5 Z9 8 U1 0 U2 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAY PY 2005 VL 40 IS 9-10 BP 2341 EP 2348 DI 10.1007/s10853-005-1956-1 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA 934ZL UT WOS:000229748000038 ER PT J AU Fujino, S Tokunaga, H Hata, S Saiz, E Tomsia, AP AF Fujino, S Tokunaga, H Hata, S Saiz, E Tomsia, AP TI Graded glass coatings for Co-Cr implant alloys SO JOURNAL OF MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 4th International Conference on High Temperature Capillarity CY MAR 31-APR 03, 2004 CL Sanremo, ITALY SP Mat Res Soc, Italian Inst Welding, Genova 2004 European Capital Culture, Provincia Imperia, Osaka Univ, NEDO Int Joint Res, Joining & Welding Res Inst, Azienda Promoz Turist Riviera Fiori, Casino Sanremo, Ctr Excellence Solidificat Undercooled Melts ZEUD DLR, Comm Montana Intemelia ID TRICALCIUM-PHOSPHATE; HYDROXYAPATITE; BIOCERAMICS; METAL; BONE AB A graded glass coating for Vitallium (R), a Co-Cr alloy, has been prepared using a simple enameling technique. The composition of the glasses has been tailored to match the thermal expansion of the alloys. The optimum glass composition and firing conditions (temperature and time) needed to fabricate homogeneous coatings with good adhesion to the alloy were determined. The final coating thickness ranged between 25 and 60 mu m. Coatings fired under optimum conditions do not delaminate during indentation tests of adhesion. Excellent adhesion to the alloy has been achieved through the formation of 100 nm thick interfacial chromium-oxide (CrOx) layers. The graded glass (consisting of BIG and 6P50 layers) can be successfully coated to a Co-Cr alloy, and forms hydroxyapatite (HA) on the coating surface when immersed in a simulated body fluid (SBF) for 30 days. (C) 2005 Springer Science + Business Media, Inc. C1 Kyushu Univ, Dept Engn Sci Elect & Mat, Fukuoka 8168580, Japan. Kyushu Univ, Dept Appl Sci Elect & Mat, Fukuoka 8168580, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Fujino, S (reprint author), Kyushu Univ, Dept Engn Sci Elect & Mat, Fukuoka 8168580, Japan. EM fujino@asem.kyushu-u.ac.jp NR 14 TC 9 Z9 9 U1 0 U2 2 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAY PY 2005 VL 40 IS 9-10 BP 2499 EP 2503 DI 10.1007/s10853-005-1982-z PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA 934ZL UT WOS:000229748000064 ER PT J AU Ueno, S Jayaseelan, DD Ohji, T Lin, HT AF Ueno, S Jayaseelan, DD Ohji, T Lin, HT TI Recession behavior of Lu2Si2O7/mullite eutectic in steam jet at high temperature SO JOURNAL OF MATERIALS SCIENCE LA English DT Article C1 Natl Inst Adv Ind Sci & Technol, Adv Mfg Res Inst, Moriyama Ku, Nagoya, Aichi 4638687, Japan. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Ueno, S (reprint author), Natl Inst Adv Ind Sci & Technol, Adv Mfg Res Inst, Moriyama Ku, 2268-1 Shimo Shidami, Nagoya, Aichi 4638687, Japan. NR 7 TC 7 Z9 7 U1 1 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAY PY 2005 VL 40 IS 9-10 BP 2643 EP 2644 DI 10.1007/s10853-005-2095-4 PG 2 WC Materials Science, Multidisciplinary SC Materials Science GA 934ZL UT WOS:000229748000097 ER PT J AU Taylor, DJ Meyer, HM AF Taylor, DJ Meyer, HM TI Wet-chemical synthesis of zirconium oxyfluoride SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID BEAM-ASSISTED DEPOSITION; FILMS C1 TPL Inc, Albuquerque, NM 87109 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Taylor, DJ (reprint author), TPL Inc, 3921 Acad Pkwy N, Albuquerque, NM 87109 USA. NR 17 TC 0 Z9 0 U1 1 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD MAY PY 2005 VL 40 IS 9-10 BP 2655 EP 2658 DI 10.1007/s10853-005-2098-1 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA 934ZL UT WOS:000229748000100 ER PT J AU Pirun, M Babnigg, G Stevens, FJ AF Pirun, M Babnigg, G Stevens, FJ TI Template-based recognition of protein fold within the midnight and twilight zones of protein sequence similarity SO JOURNAL OF MOLECULAR RECOGNITION LA English DT Article DE homology; fold recognition; evolution; statistical insignificance ID AMINO-ACID-SEQUENCES; STRUCTURE PREDICTION; PROKARYOTIC DIVERSITY; PSI-BLAST; DATABASE; CLASSIFICATION; SIMULATION; ALIGNMENT; COMPUTER; ENZYMES AB Most homologous pairs of proteins have no significant sequence similarity to each other and are not identified by direct sequence comparison or profile-based strategies. However, multiple sequence alignments of low similarity homologues typically reveal a limited number of positions that are well conserved despite diversity of function. It may be inferred that conservation at most of these positions is the result of the importance of the contribution of these amino acids to the folding and stability of the protein. As such, these amino acids and their relative positions may define a structural signature. We demonstrate that extraction of this fold template provides the basis for the sequence database to be searched for patterns consistent with the fold, enabling identification of homologs that are not recognized by global sequence analysis. The fold template method was developed to address the need for a tool that could comprehensively search the midnight and twilight zones of protein sequence similarity without reliance on global statistical significance. Manual implementations of the fold template method were performed on three folds-immunoglobulin, c-lectin and TIM barrel. Following proof of concept of the template method, an automated version of the approach was developed. This automated fold template method was used to develop fold templates for 10 of the more populated folds in the SCOP database. The fold template method developed three-dimensional structural motifs or signatures that were able to return a diverse collection of proteins, while maintaining a low false positive rate. Although the results of the manual fold template method were more comprehensive than the automated fold template method, the diversity of the results from the automated fold template method surpassed those of current methods that rely on statistical significance to infer evolutionary relationships among divergent proteins. Copyright © 2004 John Wiley & Sons, Ltd. C1 Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. Univ Illinois, Dept Bioengn, Chicago, IL 60607 USA. RP Stevens, FJ (reprint author), Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. EM fstevens@anl.gov FU NIA NIH HHS [AG18001]; NIDDK NIH HHS [DK43957] NR 42 TC 1 Z9 1 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0952-3499 J9 J MOL RECOGNIT JI J. Mol. Recognit. PD MAY-JUN PY 2005 VL 18 IS 3 BP 203 EP 212 DI 10.1002/jmr.728 PG 10 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 925XG UT WOS:000229086200004 PM 15540237 ER PT J AU Devi, VM Benner, DC Smith, MAH Rinsland, CP Predoi-Cross, A Sharpe, SW Sams, RL Boulet, C Bouanich, JP AF Devi, VM Benner, DC Smith, MAH Rinsland, CP Predoi-Cross, A Sharpe, SW Sams, RL Boulet, C Bouanich, JP TI A multispectrum analysis of the v(2) band of (HCN)-C-12-N-14: Part I. Intensities, broadening, and shift coefficients SO JOURNAL OF MOLECULAR SPECTROSCOPY LA English DT Article DE HCN; infrared spectra; Fourier transform infrared spectroscopy; absolute intensity; broadening and pressure shift coefficients ID DIODE-LASER MEASUREMENTS; ATMOSPHERIC HYDROGEN-CYANIDE; WATER-VAPOR; NU(2) BAND; SPECTROSCOPIC MEASUREMENTS; V(1) BAND; NU-2 BAND; HCN; TEMPERATURE; REGION AB Absolute intensities, self- and air-broadening coefficients, self- and air-induced shift coefficients and their temperature dependences have been determined for lines belonging to the P- and R-branches of the nu(2) band of (HCN)-C-12-N-14 centered near 712 cm(-1). Infrared spectra of HCN in the 14-mu m region were obtained at high resolution (0.002-0.008 cm(-1)) using two different Fourier transform spectrometers (FTS), the McMath-Pierce FTS at the National Solar Observatory on Kitt Peak and the Bruker IFS 120HR FTS at the Pacific Northwest National Laboratory. Spectra were recorded with 99.8% pure HCN as well as lean mixtures of HCN in air at various temperatures ranging between +26 and -60 degrees C. A multispectrum nonlinear least squares technique was used to fit selected intervals of 36 spectra simultaneously to obtain the line positions, intensities, broadening, and shift parameters. The measured line intensities were analyzed to determine the vibrational band intensity and the Herman-Wallis coefficients. The measured self-broadening coefficients vary between 0.2 and 1.2 cm(-1) atm(-1) at 296 K, and the air-broadening coefficients range from 0.08 to 0.14 cm(-1) atm(-1) at 296 K. The temperature dependence exponents of self-broadening range from 1.46 to -0.12 while the corresponding exponents for air broadening vary between 0.58 and 0.86. The present measurements are the first known determination of negative values for the temperature dependence exponents of HCN-broadening coefficients. We were able to support our self-broadening measurements with appropriate theoretical calculations. Our present measurements are compared, where possible, with previous measurements for this and other HCN bands, as well as the parameters that are included in the 2000 and 2004 editions of the high-resolution transmission (HITRAN) database. (c) 2005 Elsevier Inc. All rights reserved. C1 Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. NASA, Langley Res Ctr, Hampton, VA 23681 USA. Univ Lethbridge, Dept Phys, Lethbridge, AB T1K 3M4, Canada. Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Paris 11, Photophys Mol Lab, F-91405 Orsay, France. RP Benner, DC (reprint author), Coll William & Mary, Dept Phys, Box 8795, Williamsburg, VA 23187 USA. EM dcbenn@wm.edu NR 47 TC 13 Z9 13 U1 2 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0022-2852 J9 J MOL SPECTROSC JI J. Mol. Spectrosc. PD MAY PY 2005 VL 231 IS 1 BP 66 EP 84 DI 10.1016/j.jms.2004.12.004 PG 19 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 917DF UT WOS:000228435500008 ER PT J AU Bouanich, JP Boulet, C Predoi-Cross, A Sharpe, SW Sams, RL Smith, MAH Rinsland, CP Benner, DC Devi, VM AF Bouanich, JP Boulet, C Predoi-Cross, A Sharpe, SW Sams, RL Smith, MAH Rinsland, CP Benner, DC Devi, VM TI A multispectrum analysis of the v(2) band of (HCN)-C-12-N-14: Part II. Theoretical calculations of self-broadening, self-induced shifts, and their temperature dependences SO JOURNAL OF MOLECULAR SPECTROSCOPY LA English DT Article DE HCN; theoretical broadening and shifts; infrared spectra; FTIR spectroscopy ID DIODE-LASER MEASUREMENTS; OVERTONE BANDS; SPECTRAL LINES; HCN; TRANSITIONS; MOLECULES; REGION; COEFFICIENTS; INTENSITIES; RANGE AB A semiclassical theory based upon the Robert-Bonamy formalism has been developed to explain the experimental measurements of self-broadening, self-induced pressure shift coefficients in the nu(1), nu(2), 2 nu(2) bands of (HCN)-C-12-N-14 and the 2 nu(1) band of (HCN)-C-13-N-14, as well as the temperature dependences of these parameters with special emphasis on the nu(2) band. Our calculations include only electrostatic interactions and neglect the vibrational dependence of the isotropic part of the intermolecular potential, which probably has a weak contribution to the HCN self-shifts for the bands investigated in this study. The agreement between theory and measurements is good in the cases of self-broadening coefficients and their variation with temperature, as well as the self-shift coefficients determined at room temperature. However, the observed temperature dependence of self-shift coefficients in the nu(2) band is different from that derived theoretically. (c) 2004 Elsevier Inc. All rights reserved. C1 Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. Univ Paris 11, CNRS, Photophys Mol Lab, F-91405 Orsay, France. Univ Lethbridge, Dept Phys, Lethbridge, AB T1K 3M4, Canada. Pacific NW Natl Lab, Richland, WA 99352 USA. NASA, Langley Res Ctr, Hampton, VA 23681 USA. RP Devi, VM (reprint author), Coll William & Mary, Dept Phys, Box 8795, Williamsburg, VA 23187 USA. EM m.d.venkataraman@larc.nasa.gov NR 26 TC 9 Z9 9 U1 0 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0022-2852 J9 J MOL SPECTROSC JI J. Mol. Spectrosc. PD MAY PY 2005 VL 231 IS 1 BP 85 EP 95 DI 10.1016/j.jms.2004.12.002 PG 11 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 917DF UT WOS:000228435500009 ER PT J AU Bachand, M Trent, AM Bunker, BC Bachand, GD AF Bachand, M Trent, AM Bunker, BC Bachand, GD TI Physical factors affecting kinesin-based transport of synthetic nanoparticle cargo SO JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY LA English DT Article DE CdSe quantum dots; taxol-stabilized microtubules; Drosophila kinesin; active transport systems; nanobiotechnology; biomolecular materials ID HAND-OVER-HAND; MOLECULAR SHUTTLES; MOTOR PROTEINS; MICROTUBULES; SURFACES; TRACKS; MOVEMENT; DRIVEN AB Recently, kinesin biomolecular motors and microtubules filaments (MTs) were used to transport metal and semiconductor nanoparticles with the long-term goal of exploiting this active transport system to dynamically assemble nanostructured materials. In some cases, however, the presence of nanoparticle cargo on MTs was shown to inhibit transport by interfering with kinesin-MT interactions. The primary objectives of this work were (1) to determine what factors affect the ability of kinesin and MTs to transport nanoparticle cargo, and (2) to establish a functional parameter space in which kinesin and MTs can support unimpeded transport of nanoparticles and materials. Of the factors evaluated, nanoparticle density on a given MT was the most significant factor affecting kinesin-based transport of nanoparticles. The density of particles was controlled by limiting the number of available linkage sites (i.e., biotinylated tubulin), and/or the relative concentration of nanoparticles in solution. Nanoparticle size was also a significant factor affecting transport, and attributed to the ability of particles <= 40 nm in diameter to bind to the "underside" of the MT, and block kinesin transport. Overall, a generalized method of assembling and transporting a range of nanoparticle cargo using kinesin and MTs was established. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800,MS 1413, Albuquerque, NM 87185 USA. OI Bachand, George/0000-0002-3169-9980 NR 26 TC 63 Z9 63 U1 0 U2 6 PU AMER SCIENTIFIC PUBLISHERS PI VALENCIA PA 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA SN 1533-4880 EI 1533-4899 J9 J NANOSCI NANOTECHNO JI J. Nanosci. Nanotechnol. PD MAY PY 2005 VL 5 IS 5 BP 718 EP 722 DI 10.1166/jnn.2005.112 PG 5 WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 926JQ UT WOS:000229119900004 PM 16010927 ER PT J AU Bigio, EH Paunesku, T Mishra, M Vogt, S Lai, B Maser, J Woloschak, GE AF Bigio, EH Paunesku, T Mishra, M Vogt, S Lai, B Maser, J Woloschak, GE TI X-ray fluorescence spectroscopy in situ quantification of metals/elements in Alzheimer disease. SO JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY LA English DT Meeting Abstract CT 81st Annual Meeting of the American-Association-of-Neuropathologists CY JUN 09-12, 2005 CL Arlington, VA SP Amer Assoc Neuropathol C1 Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA. Northwestern Alzheimer Dis Ctr, Chicago, IL USA. Argonne Natl Lab, Argonne, IL 60439 USA. RI Maser, Jorg/K-6817-2013; Paunesku, Tatjana/A-3488-2017; Woloschak, Gayle/A-3799-2017 OI Paunesku, Tatjana/0000-0001-8698-2938; Woloschak, Gayle/0000-0001-9209-8954 NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0022-3069 J9 J NEUROPATH EXP NEUR JI J. Neuropathol. Exp. Neurol. PD MAY PY 2005 VL 64 IS 5 MA 48 BP 442 EP 442 PG 1 WC Clinical Neurology; Neurosciences; Pathology SC Neurosciences & Neurology; Pathology GA 923YP UT WOS:000228945800058 ER PT J AU Fukumoto, K Takahashi, S Kurtz, RJ Smith, DL Matsui, H AF Fukumoto, K Takahashi, S Kurtz, RJ Smith, DL Matsui, H TI Microstructural examination of V-(Fe or Cr)-Ti alloys after thermal-creep or irradiation-creep tests SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID VANADIUM-BASE ALLOYS; MECHANICAL-PROPERTIES; NEUTRON-IRRADIATION; FUSION-REACTOR; V-4CR-4TI; PROGRAM AB Microstructural examinations have been performed on irradiation-creep and thermal-creep pressurized tube specimens of V-3Fe-4Ti-0.1Si in order to understand failure and creep mechanisms. There are no typical microstructural differences between unstressed and pressurized creep tube specimens irradiated in ATR-A1 in the irradiation temperature regime from 212 to 300 degrees C. Failed thermal creep specimens show dislocation structures dependent on the tube specimen geometry. This can be interpreted in terms of a large number of slip dislocations oriented for optimum slip. (c) 2005 Elsevier B.V. All rights reserved. C1 Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan. Pacific NW Natl Lab, Richland, WA 99352 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Fukumoto, K (reprint author), Univ Fukui, Sch Nucl Power & Energy Safety Engn, 3-9-1 Bunkyo, Fukui 9108507, Japan. EM fukumoto@mech.fukui-u.ac.jp NR 15 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAY 1 PY 2005 VL 341 IS 1 BP 83 EP 89 DI 10.1016/j.jnucmat.2005.01.016 PG 7 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 919OX UT WOS:000228628500009 ER PT J AU Treguier, AM Theetten, S Chassignet, EP Penduff, T Smith, R Talley, L Beismann, JO Boning, C AF Treguier, AM Theetten, S Chassignet, EP Penduff, T Smith, R Talley, L Beismann, JO Boning, C TI The North Atlantic subpolar gyre in four high-resolution models SO JOURNAL OF PHYSICAL OCEANOGRAPHY LA English DT Article ID MID-DEPTH CIRCULATION; LABRADOR SEA; IRMINGER SEAS; NUMERICAL-SIMULATION; REGIONAL MODEL; OCEAN MODEL; WATER; GREENLAND; PARAMETERIZATION; REPRESENTATION AB The authors present the first quantitative comparison between new velocity datasets and high-resolution models in the North Atlantic subpolar gyre [1/10 degrees Parallel Ocean Program model (POPNA10), Miami Isopycnic Coordinate Ocean Model (MICOM), 1/6 degrees Atlantic model (ATL6), and Family of Linked Atlantic Ocean Model Experiments (FLAME)]. At the surface, the model velocities agree generally well with World Ocean Circulation Experiment (WOCE) drifter data. Two noticeable exceptions are the weakness of the East Greenland coastal current in models and the presence in the surface layers of a strong southwestward East Reykjanes Ridge Current. At depths, the most prominent feature of the circulation is the boundary current following the continental slope. In this narrow flow, it is found that gridded float datasets cannot be used for a quantitative comparison with models. The models have very different patterns of deep convection, and it is suggested that this could be related to the differences in their barotropic transport at Cape Farewell. Models show a large drift in watermass properties with a salinization of the Labrador Sea Water. The authors believe that the main cause is related to horizontal transports of salt because models with different forcing and vertical mixing share the same salinization problem. A remarkable feature of the model solutions is the large westward transport over Reykjanes Ridge [10 Sv (Sv = 10(6) m(3) s(-1)) or more]. C1 CNRS, IFREMER, UBO, Lab Phys Oceans, Brest, France. Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, MPO, Miami, FL 33149 USA. Univ Grenoble 1, Lab Ecoulements Geophys & Ind, Grenoble, France. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA. NEC High Performance Comp Europe GmbH, Dusseldorf, Germany. Inst Meereskunde, D-2300 Kiel, Germany. RP Treguier, AM (reprint author), CNRS, IFREMER, UBO, Lab Phys Oceans, BP 70, Plouzane, France. EM treguier@ifremer.fr RI Theetten, Sebastien/G-2027-2010; Treguier, Anne Marie/B-7497-2009; Boening, Claus/B-1686-2012 OI Theetten, Sebastien/0000-0003-3823-2328; Treguier, Anne Marie/0000-0003-4569-845X; Boening, Claus/0000-0002-6251-5777 NR 44 TC 82 Z9 83 U1 1 U2 4 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-3670 J9 J PHYS OCEANOGR JI J. Phys. Oceanogr. PD MAY PY 2005 VL 35 IS 5 BP 757 EP 774 DI 10.1175/JPO2720.1 PG 18 WC Oceanography SC Oceanography GA 938KY UT WOS:000230003500012 ER PT J AU Voronin, GA Pantea, C Zerda, TW Wang, L Zhao, Y AF Voronin, GA Pantea, C Zerda, TW Wang, L Zhao, Y TI Thermal equation-of-state of osmium: a synchrotron X-ray diffraction study SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article DE X-ray diffraction; high pressure; equations of state ID HIGH-PRESSURE AB The pressure-volume-temperature behavior of osmium was studied at pressures and temperatures up to 15 GPa and 1273 K. In situ measurements were conducted using energy-dispersive synchrotron X-ray diffraction in a T-cup 6-8 high pressure apparatus. A fit of room-temperature data by the third-order Birch-Murnaghan equation-of-state yielded isothermal bulk modulus K-0=435(19) GPa and its pressure derivative K'(0)=3.5(0.8) GPa. High-temperature data were analyzed using Birch-Murnaghan equation of state and thermal pressure approach. The temperature derivative of bulk modulus was found to be -0.061(9) GPa K-1. Significant anisotropy of osmium compressibility was observed. (c) 2004 Elsevier Ltd. All rights reserved. C1 Texas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA. SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Zerda, TW (reprint author), Texas Christian Univ, Dept Phys & Astron, TCU Box 298840, Ft Worth, TX 76129 USA. EM g.voronin@hotmail.com; t.zerda@t-cu.edu RI Pantea, Cristian/D-4108-2009; Lujan Center, LANL/G-4896-2012; OI Pantea, Cristian/0000-0002-0805-8923 NR 16 TC 14 Z9 14 U1 0 U2 3 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 2005 VL 66 IS 5 BP 706 EP 710 DI 10.1016/j.jpcs.2004.08.045 PG 5 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA 906GE UT WOS:000227627900002 ER PT J AU Garvie, LAJ Xu, HF Wang, YF Putnam, RL AF Garvie, LAJ Xu, HF Wang, YF Putnam, RL TI Synthesis of (Ca,Ce3+,Ce4+)(2)Ti2O7: a pyrochlore with mixed-valence cerium SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article DE ceramics; chemical synthesis; electron energy loss spectroscopy (EELS); electron microscopy ID ENERGY-LOSS SPECTROSCOPY; GROUP MINERALS; NUCLEAR-WASTE; OXIDATION-STATES; SUPERCONDUCTIVITY; THERMODYNAMICS; CARBONATITES; ZIRCONOLITE; CAZRTI2O7; PLUTONIUM AB Pyrochlore with mixed-valence Ce was synthesized by firing and annealing Ce(NO3)(4), TiO2, and Ca(OH)(2) with a stoichiometry of CaCeTi2O7 at 1300 degrees C. The product contains Ce-pyrochlore, Ce-rich perovskite, CeO2 (cerianite), and minor CaO. Electron energy-loss spectroscopy (EELS) revealed both Ce4+ and Ce3+ in the Ce-pyrochlore with a Ce4+ to total Ce (Ce4+/Sigma Ce) of 0.80 giving (Ca0.87Ce0.213+ Ce-0.86(4+))Ti2.05O7. Cerium in the perovskite and cerianite is dominated by Ce3+ and Ce4+, respectively. High-resolution transmission electron microscope (FIRTEM) images show that the boundary between Ce-pyrochlore and Ce-rich perovskite is semicoherently bonded. The orientational relationship between the neighboring Ce-pyrochlore and Cc-rich perovskite is not random. Cepyrochlore (CaCeTi2O7) is a chemical analogue for CaPuTi2O7, which is a proposed ceramic waste form for deposition of excess weapons-usable Pu in geological repositories. It is postulated, based on the presence of Ce3+ in the Ce-pyrochlore, that neutron poisons such as Gd can be incorporated into the CaPuTi2O7 phase. (c) 2005 Elsevier Ltd. All rights reserved. C1 Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA. Univ New Mexico, Dept Earth & Planetary Sci, Transmiss Elect Microscopy Lab, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Garvie, LAJ (reprint author), Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA. EM lgarvie@asu.edu NR 28 TC 17 Z9 17 U1 0 U2 16 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 2005 VL 66 IS 5 BP 902 EP 905 DI 10.1016/j.jpcs.2004.10.012 PG 4 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA 906GE UT WOS:000227627900030 ER PT J AU Filikhin, I Suslov, VM Vlahovic, B AF Filikhin, I Suslov, VM Vlahovic, B TI A new prediction for the binding energy of the He-7(Lambda) hypernucleus SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article ID SHELL-MODEL ANALYSIS; LAMBDA-N-INTERACTION; LIGHT HYPERNUCLEI; 3-BODY MODEL; FADDEEV-EQUATIONS; SCATTERING; NUCLEI; BE-9(LAMBDA); TRANSITIONS; FORCES AB P-shell A = 7 hypernuclei are considered in the cluster (5)(Lambda) He+N+N model. The folding procedure using the OBE simulating (NSC97f) model for Lambda N potential and various alpha Lambda potentials are applied to construct the (5)(Lambda) He-N interaction. Configuration space Faddeev calculations are performed for the hyperon binding energy of the He-7(Lambda)(1/2(+)) and Li-7(Lambda)(1/2(+) and 3/2(+) T = 0) hypernuclei. The new predicted value for B-Lambda ((7)(Lambda) He) is 5.35 MeV. This value was obtained with the (6)(Lambda) He(2(-)) excitation energy equal to 0.26 MeV. Since the 2(-) state of (6)(Lambda) He has not yet been observed, the (6)(Lambda) He(2(-)) excitation energy was chosen to reproduce the experimental value of the (7)(Lambda) Li(3/2(+)) excitation energy by the adjustment of the (5)(Lambda) He-N effective potential. Our results are compared with those of Hiyama et al (1996 Phys. Rev. C 53 2075; 1999 Phys. Rev. C 59 23 5 1). C1 N Carolina Cent Univ, Dept Phys, Durham, NC 27707 USA. St Petersburg State Univ, Dept Math & Computat Phys, Petrodvorets 198504, Russia. Jefferson Lab, Newport News, VA 23606 USA. RP N Carolina Cent Univ, Dept Phys, Durham, NC 27707 USA. EM branko@jlab.org NR 39 TC 5 Z9 5 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 EI 1361-6471 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD MAY PY 2005 VL 31 IS 5 BP 389 EP 400 DI 10.1088/0954-3899/31/5/009 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 927TC UT WOS:000229222400011 ER PT J AU Jahshan, SN Kammash, T AF Jahshan, SN Kammash, T TI Multimegawatt nuclear reactor design for plasma propulsion systems SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB Material and design innovations are introduced to reduce the mass and volume of an established safe gas-cooled cermet reactor design so that it can be deployed as a multimegawatt electric power source for plasma thrusters including the laser accelerated plasma propulsion system. The design improvements include the deployement of alternate fissile ceramics of uranium, plutonium, or americium and changes in reflectors and vessel specification, without introducing adverse effects on already achieved safety features during launch and operations. The design effort yields several candidates with degrees of mass and volume minimizations reaching 75% compared to the base design. C1 Univ Michigan, Dept Nucl & Radiol Sci, Ann Arbor, MI 48109 USA. RP Jahshan, SN (reprint author), Los Alamos Natl Lab, HSR 12,Mail Stop K 483, Los Alamos, NM 87545 USA. EM salim@lanl.gov NR 15 TC 1 Z9 1 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAY-JUN PY 2005 VL 21 IS 3 BP 385 EP 391 DI 10.2514/1.5456 PG 7 WC Engineering, Aerospace SC Engineering GA 926OO UT WOS:000229132700001 ER PT J AU Markusic, TE Polzin, KA Choueiri, EY Keidar, M Boyd, ID Lepsetz, N AF Markusic, TE Polzin, KA Choueiri, EY Keidar, M Boyd, ID Lepsetz, N TI Ablative Z-pinch pulsed plasma thruster SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID DISCHARGE; PROPULSION AB The design, performance, and basic features of ablative pulsed plasma thrusters based on the z-pinch configuration are discussed through a series of experiments and numerical simulations. The motivation stems from the promise of the z-pinch configuration for increasing the thrust-to-power ratio and mass utilization efficiency above those of ablative thrusters with a conventional rectangular geometry. The performance of a series of ablative z-pinch pulsed plasma thrusters is characterized using a swinging-gate thrust stand and mass ablation measurements. The performance measurements are complemented by additional experimental diagnostics (current monitoring and high-speed photography) and numerical modeling in order to gain an understanding of the acceleration mechanism and provide direction for future design iterations. Three iterations in the design of the thruster result in thrust-to-power ratios ranging from 12-45 μ N/W, with specific impulse and thrust efficiency values spanning 240-760 s and 2-9%, respectively. Numerical simulations show reasonable quantitative agreement with the experimental data and predict the existence of an optimal thrust chamber aspect ratio, which maximizes the thrust-to-power ratio. C1 Princeton Univ, USAF Palace Knight, Elect Propuls & Plasma Dynam Lab, Dept Aerosp & Mech Engn,Appl Phys Grp, Princeton, NJ 08544 USA. Princeton Univ, Natl Def Sci & Engn, Princeton, NJ 08544 USA. Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA. RP Markusic, TE (reprint author), NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. EM choueiri@princeton.edu NR 39 TC 13 Z9 18 U1 1 U2 8 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAY-JUN PY 2005 VL 21 IS 3 BP 392 EP 400 DI 10.2514/1.4362 PG 9 WC Engineering, Aerospace SC Engineering GA 926OO UT WOS:000229132700002 ER PT J AU Schmid, AK Lipton, MS Mottaz, H Monroe, ME Smith, RD Lidstrom, ME AF Schmid, AK Lipton, MS Mottaz, H Monroe, ME Smith, RD Lidstrom, ME TI Global whole-cell FTICR mass spectrometric proteomics analysis of the heat shock response in the radioresistant bacterium Deinococcus radiodurans SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE heat shock; Deinococcus radiodurans; FTICR proteomics ID ESCHERICHIA-COLI; GENE-EXPRESSION; IONIZING-RADIATION; PROTEINS; REGULATOR; SURVIVAL; TAGS AB The results of previous studies indicated that D. radiodurans mounts a regulated protective response to heat shock, and that expression of more than 130 genes, including classical chaperones such as the groESL and dnaKJ operons and proteases such as clpB are induced in response to elevated temperature. In addition, previous qualitative whole-cell mass spectrometric studies conducted under heat shock conditions indicated global changes in the D. radiodurans proteome. To enable the discovery of novel heat shock inducible proteins as well as gain greater biological insight into the classical heat shock response at the protein level, we undertook the global whole-cell FTICR mass spectrometric proteomics study reported here. We have greatly increased the power of this approach by conducting a large number of replicate experiments in addition to taking a semiquantitative approach to data analysis, finding good reproducibility between replicates. Through this analysis, we have identified with high confidence a core set of classical heat shock proteins whose expression increases dramatically and reproducibly in response to elevated temperature. In addition, we have found that the heat shock proteome includes a large number of induced proteins that have not been identified previously as heat responsive, and have therefore been designated as candidate responders. Finally, our results are consistent with the hypothesis that elevated temperature stress could lead to cross-protection against other related stresses. C1 Univ Washington, Mol & Cellular Biol Program, Seattle, WA 98195 USA. Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA. Univ Washington, Dept Microbiol, Seattle, WA 98195 USA. Univ Washington, Dept Chem Engn, Seattle, WA 98195 USA. RP Schmid, AK (reprint author), Inst Syst Biol, 1441 N 34th St, Seattle, WA 98103 USA. EM aschmid@systemsbiology.org RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 18 TC 18 Z9 20 U1 1 U2 3 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 2005 VL 4 IS 3 BP 709 EP 718 DI 10.1021/pr049815n PG 10 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 936VB UT WOS:000229882400006 PM 15952717 ER PT J AU Yang, F Bogdanov, B Strittmatter, EF Vilkov, AN Gritsenko, M Shi, L Elias, DA Ni, SS Romine, M Pasa-Tolic, L Lipton, MS Smith, RD AF Yang, F Bogdanov, B Strittmatter, EF Vilkov, AN Gritsenko, M Shi, L Elias, DA Ni, SS Romine, M Pasa-Tolic, L Lipton, MS Smith, RD TI Characterization of purified c-type heme-containing peptides and identification of c-type heme-attachment sites in Shewanella oneidenis cytochromes using mass spectrometry SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE c-type cytochromes; charged heme; heme-containing peptides; fragmentation; heme loss ID ELECTROSPRAY-IONIZATION; INDUCED DISSOCIATION; ION-TRAP; PROTEINS; PROTEOME; GENOME; IRON; FRAGMENTATION; PUTREFACIENS; BIOMOLECULES AB We describe methods for mass spectrometric identification of heme-containing peptides from c-type cytochromes that contain the CXXCH (X = any amino acid) sequence motif. The heme fragment ion yielded the most abundant MS/MS peak for standard heme-containing peptides with one amino acid difference for both 2+ and 3+ peptide charge states; both sequence and charge affect the extent of heme loss. Application to Shewanella oneidenis demonstrated the utility of this approach for identifying c-type heme-containing peptides from complex proteome samples. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999, Richland, WA 99352 USA. RI Elias, Dwayne/B-5190-2011; Smith, Richard/J-3664-2012; OI Elias, Dwayne/0000-0002-4469-6391; Smith, Richard/0000-0002-2381-2349; Romine, Margaret/0000-0002-0968-7641 NR 43 TC 19 Z9 19 U1 0 U2 6 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 2005 VL 4 IS 3 BP 846 EP 854 DI 10.1021/pr0497475 PG 9 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 936VB UT WOS:000229882400020 PM 15952731 ER PT J AU Wang, TY Gu, S Ronni, T Du, YC Chen, M AF Wang, TY Gu, S Ronni, T Du, YC Chen, M TI In vivo dual-tagging proteomic approach in studying signaling pathways in immune response SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE dual-tagging; toll like receptor; proteomic; MyD88; TAP; FLAP-1 ID PROTEIN-PROTEIN INTERACTIONS; TOLL-LIKE RECEPTORS; LEUCINE-RICH REPEAT; QUANTITATIVE PROTEOMICS; FLIGHTLESS I; IDENTIFICATION; EXPRESSION; ACCURATE; COMPLEX; INNATE AB Up to date, few successes have been achieved to identify the signaling molecules directly from immune cells due to their low-abundance and dynamic nature. Here, we designed an in vivo dual-tagging quantitative approach that integrated epitope-tagging which allows single affinity purification of the natural complexes formed at real-time, and amino acid-coded mass tagging (AACT) that assists mass spectrometry-based quantitative measurement, to identify the specific components of a signaling complex formed in macrophage cells upon lipopolysaccha ride (LPS) stimulation. The sensitivity and accuracy of this quantitative method are significantly higher than those of tandem affinity purification, because the multiple step of purifications are avoided to preserve weakly interacting molecules. We identified a number of proteins that interact with MyD88, a critical adaptor protein in innate immune response, in macrophages upon stimulation. Among those newly identified MyD88-interacting partners, FLAP-1 was found to be an activator of NF-kappa B, the key transcription factor in immune response. This integrated approach provides global information on the functional link between MyD88 and other proteins in transclucing the TLR-mediated signal and is generally applicable to in vivo analyses of other signaling pathways. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. Univ Calif Los Angeles, Sch Med, Los Angeles, CA 90095 USA. RP Chen, M (reprint author), Los Alamos Natl Lab, Biosci Div, MS M888, Los Alamos, NM 87545 USA. EM chen_xian@lanl.gov NR 41 TC 42 Z9 44 U1 0 U2 2 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 2005 VL 4 IS 3 BP 941 EP 949 DI 10.1021/pr050031z PG 9 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 936VB UT WOS:000229882400030 PM 15952741 ER PT J AU Hillesheim, MB Hodell, DA Leyden, BW Brenner, M Curtis, JH Anselmetti, FS Ariztegui, D Buck, DG Guilderson, TP Rosenmeier, MF Schnurrenberger, DW AF Hillesheim, MB Hodell, DA Leyden, BW Brenner, M Curtis, JH Anselmetti, FS Ariztegui, D Buck, DG Guilderson, TP Rosenmeier, MF Schnurrenberger, DW TI Climate change in lowland Central America during the late deglacial and early Holocene SO JOURNAL OF QUATERNARY SCIENCE LA English DT Article DE Central America; Neotropics; palaeoclimate; lake sediments; geochemistry; stable isotopes; pollen; Holocene; Preboreal; deglaciation; Intertropical Convergence Zone; 8.2-kyr Event ID LAKE VALENCIA BASIN; LAST DEGLACIATION; TROPICAL ATLANTIC; YR BP; LATE PLEISTOCENE; MAYA LOWLANDS; RECORD; CIRCULATION; CALIBRATION; GUATEMALA AB The transition from arid glacial to moist early Holocene conditions represented a profound change in northern lowland Neotropical climate. Here we report a detailed record of changes in moisture availability during the latter part of this transition (similar to 11250 to 7500 cal. yr BP) inferred from sediment cores retrieved in Lake Peten Itza, northern Guatemala. Pollen assemblages demonstrate that a mesic forest had been largely established by similar to 11250 cal. yr BP, but sediment properties indicate that lake level was more than 35 m below modern stage. From 11250 to 10350 cal. yr BP, during the Preboreal period, lithologic changes in sediments from deep-water cores (> 50m below modern water level) indicate several wet-dry cycles that suggest distinct changes in effective moisture. Four dry events (designated PBE1-4) occurred centred at 11200, 10900, 10700 and 10400 cal. yr BP and correlate with similar variability observed in the Cariaco Basin titanium record and glacial meltwater pulses into the Gulf of Mexico. After 10350 cal. yr BP, multiple sediment proxies suggest a shift to a more persistently moist early Holocene climate. Comparison of results from Lake Peten Itza with other records from the circum-Caribbean demonstrates a coherent climate response during the entire span of our record. Furthermore, lowland Neotropical climate during the late deglacial and early Holocene period appears to be tightly linked to climate change in the high-latitude North Atlantic. We speculate that the observed changes in lowland Neotropical precipitation were related to the intensity of the annual cycle and associated displacements in the mean latitudinal position of the Intertropical Convergence Zone and Azores-Bermuda high-pressure system. This mechanism operated on millennial-to-submillennial timescales and may have responded to changes in solar radiation, glacial meltwater, North Atlantic sea ice, and the Atlantic meridional overturning circulation (MOC). Copyright (c) 2005 John Wiley & Sons, Ltd. C1 Univ Florida, Dept Geol Sci & Land Use, Gainesville, FL 32611 USA. Univ Florida, Environm Change Inst, LUECI, Gainesville, FL 32611 USA. Univ S Florida, Dept Geol, Tampa, FL 33620 USA. ETH, Inst Geol, CH-8092 Zurich, Switzerland. Univ Geneva, Inst Forel, Geneva, Switzerland. Univ Geneva, Dept Geol, Geneva, Switzerland. Univ Florida, Sch Nat Resources & Environm, Gainesville, FL 32611 USA. Univ Florida, LUECI, Gainesville, FL 32611 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA. Univ Minnesota, Natl Lacustrine Core Repository & Limnol Res Ctr, Minneapolis, MN 55455 USA. RP Hillesheim, MB (reprint author), Univ Florida, Dept Geol Sci & Land Use, Gainesville, FL 32611 USA. EM mbhilles@ufl.edu NR 56 TC 41 Z9 43 U1 0 U2 16 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0267-8179 J9 J QUATERNARY SCI JI J. Quat. Sci. PD MAY PY 2005 VL 20 IS 4 BP 363 EP 376 DI 10.1002/jqs.924 PG 14 WC Geosciences, Multidisciplinary; Paleontology SC Geology; Paleontology GA 929XK UT WOS:000229379700006 ER PT J AU Espinosa, G Silva, RJ AF Espinosa, G Silva, RJ TI Environmental radioactivity - Gel detector for 222Rn gas SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID U-238; DECAY AB In this paper, a new radiation detection method is introduced which uses a commercial gel material for the measurement of radon (Rn-222) gas. This method is based on the diffusion of radon gas into the gel material and the measurement of the radioactive daughters resulting from the radon decay. The Bi-214 daughter gamma-ray, with an energy of 0.609 MeV, was chosen for these measurements, and the gamma-ray photopeak was analyzed via a HPGe multichannel system. The results indicate a linear relationship between the integrated area of the Bi-214 photopeak and the concentration of radon that had diffused into the gel material. Two very well defined radon response levels were observed: (1) from 150 to 1500 Bq center dot m(-3) and (2) from 1500 to 7400 Bq center dot m(-3). This method gives highly reproducible and reliable results in the measurements of radon. This new technique opens the door to future studies of different gel materials in order to obtain better sensitivity and new applications in the measurement of radioactive gases. C1 Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Espinosa, G (reprint author), Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico. EM espinosa@fisica.unam.mx NR 7 TC 0 Z9 0 U1 0 U2 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 333 EP 336 DI 10.1007/s10967-005-0717-6 PG 4 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700011 ER PT J AU Wong, CT Soliman, VM Perera, SK AF Wong, CT Soliman, VM Perera, SK TI Gross alpha/beta analyses in water by liquid scintillation counting SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article AB The standard procedure for analyzing gross alpha and gross beta in water is evaporation of the sample and radioactivity determination of the resultant solids by proportional counting. This technique lacks precision, and lacks sensitivity for samples with high total dissolved solids. Additionally, the analytical results are dependent on the choice of radionuclide calibration standard and the sample matrix. Direct analysis by liquid scintillation counting has the advantages of high counting efficiencies and minimal sample preparation time. However, due to the small sample aliquants used for analysis, long count times are necessary to reach required detection limits. The procedure proposed consists of evaporating a sample aliquant to dryness, dissolving the resultant solids in a small volume of dilute acid, followed by liquid scintillation counting to determine radioactivity. This procedure can handle sample aliquants containing up to 500 mg of dissolved solids. Various acids, scintillation cocktail mixtures, instrument discriminator settings, and regions of interest (ROI) were evaluated to determine optimum counting conditions. Precision is improved and matrix effects are reduced as compared to proportional counting. Tests indicate that this is a viable alternative to proportional counting for gross alpha and gross beta analyses of water samples. C1 Calif Dept Hlth Serv, Sanitat & Radiat Labs Branch, Richmond, CA 94804 USA. Lawrence Livermore Natl Lab, Hazards Control Dept, Livermore, CA 94551 USA. RP Wong, CT (reprint author), Calif Dept Hlth Serv, Sanitat & Radiat Labs Branch, 850 Marina Bay Pkwy, Richmond, CA 94804 USA. EM wong65@llnl.gov NR 2 TC 7 Z9 8 U1 0 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 357 EP 363 DI 10.1007/s10967-005-0721-x PG 7 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700015 ER PT J AU Kaplan, DI Hinton, TG Knox, AS AF Kaplan, DI Hinton, TG Knox, AS TI Cesium-137 partitioning to wetland sediments and uptake by plants SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID AFFECTING RADIOCESIUM UPTAKE; CS-137; EXTRACTION AB Studies were undertaken to develop a conceptual model for conducting ecological risk assessment at the R-Canal, located on the Savannah River Site, Aiken, South Carolina. Soil profiles collected from within the canals indicated that the maximum (137)Cs concentrations generally occurred at a depth between 2.5 and 7.5 cm. The original (137)Cs deposits, the result of accidental releases in the early 1960's, were covered by newly formed organic and/or fluvial deposits. About 60% of the total (137)Cs inventory in each core existed at the organic matter/mineral interface. Based on sequential extraction tests, most of the Cs in this layer was held by either amorphous Fe-oxyhydroxides or organic matter. Sequential extraction tests also indicated that almost half of the Cs was weakly bound to the soil (either exchangeable or associated with amorphous Fe-oxides), a percentage that is five times greater than reported at the Hanford Site. (137)Cs distribution within the profile was controlled more when the (137)Cs was released than by the composition (organic matter concentrations, mineralogy, particle size distribution) of the soil. Netted chain fern had greater plant: soil concentration ratios in drier terrestrial environments than in wetland environments. The cause may be related to the Cs existing in a more bioavailable form or to the better overall health of the plants under drier soil conditions. The average concentration ratio was greater for the netted chain fern 2.78+/-2.96 than for rice cutgrass 0.18+/-0.13. The overall average plant: soil concentration ratio, 1.05+/-2.01, was large and points out, yet again, that Cs bioavailability is greater on the SRS than at most other sites. C1 Westinghouse Savannah River Co, Savannah River Lab, Aiken, SC 29808 USA. Savannah River Ecol Lab, Aiken, SC 29803 USA. RP Kaplan, DI (reprint author), Westinghouse Savannah River Co, Savannah River Lab, Aiken, SC 29808 USA. EM daniel.kaplan@srs.gov NR 21 TC 1 Z9 2 U1 1 U2 14 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 393 EP 399 DI 10.1007/s10967-005-0727-4 PG 7 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700021 ER PT J AU Miller, GG Palmer, PD Dry, DE Hallman, DR Wilhelmy, JB AF Miller, GG Palmer, PD Dry, DE Hallman, DR Wilhelmy, JB TI Determination of surface-bound Th-228 and Ra-226 on hardware associated with neutral current detector deployment at the Sudbury Neutrino Observatory SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article AB A sensitive system for the determination of surface-bound thorium and uranium on detector components and deployment hardware associated with the Sudbury Neutrino Observatory is described. The method involves assay for Ra-224 and Ra-226 in ultra-pure water used to leach the component under test. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Laurentian Univ, Dept Phys, Sudbury, ON P3E 2C6, Canada. RP Miller, GG (reprint author), Los Alamos Natl Lab, MS M319, Los Alamos, NM 87545 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 401 EP 405 DI 10.1007/s10967-005-0728-3 PG 5 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700022 ER PT J AU Hinton, TG Knox, AS Kaplan, DI Sharitz, R AF Hinton, TG Knox, AS Kaplan, DI Sharitz, R TI Phytoextraction of uranium and thorium by native trees in a contaminated wetland SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID DECAY SERIES RADIONUCLIDES; PLANTS AB The phytoremediation potential of native trees in a U and Tb contaminated wetland was examined. Based on measurements of the annual biomass of leaves and their contaminant concentrations, we estimated the reduction in soil contamination over time. Significant differences among tree species were found, with tupelo (Nyssa sylvatica) and sweetgum (Liquidambar styraciflua) having a significantly greater capacity to remove U and Tb from the soil than the other tree species. More U was phytoextracted than Tb from the site. Phytoextraction rate constants were developed and revealed that although U and Tb phytoextraction was exceptionally high at the site, an order of magnitude greater than predicted, the community of native trees would lower the soil inventory of U-238 and Th-232 by only 1 % over the next 100 years. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Savannah River Natl Lab, Aiken, SC 29808 USA. RP Hinton, TG (reprint author), Univ Georgia, Savannah River Ecol Lab, Drawer E, Aiken, SC 29802 USA. EM thinton@srel.edu NR 20 TC 10 Z9 13 U1 3 U2 21 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 417 EP 422 DI 10.1007/s10967-005-0731-8 PG 6 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700025 ER PT J AU LaMont, SP Hall, G AF LaMont, SP Hall, G TI Uranium age determination by measuring the Th-230/U-234 ratio SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article AB A radiochemical isotope dilution mass spectrometry method has been developed to determine the age of uranium materials. The amount of Th-230 activity, the first progeny of U-234, that had grown into a small uranium metal sample was used to determine the elapsed time since the material was last radiochemically purified. To preserve the sample, only a small amount of oxidized uranium was removed from the surface of the sample and dissolved. Aliquots of the dissolved sample were spiked with U-233 tracer and radiochemically purified by anion-exchange chromatography. The U-234 isotopic concentration was then determined by thermal ionization mass spectrometry (TIMS). Additional aliquots of the sample were spiked with Tb-229 tracer, and the thorium was purified using two sequential anion-exchange chromatography separations. The isotopic concentrations of Tb-230 and Tb-232 were determined by TIMS. The lack of any Tb-232 confirmed the assumption that all thorium was removed from the uranium sample at the time of purification. the Th-230 and U-234 mass concentrations were converted to activities and the Tb-230/U-234 ratio for the sample was calculated. The experimental Tb-230/U-234 ratio showed the uranium in this sample was radiochemically purified in about 1945. C1 Savannah River Technol Ctr, Nonproliferat Technol Sect, Aiken, SC 29808 USA. RP LaMont, SP (reprint author), Savannah River Technol Ctr, Nonproliferat Technol Sect, Bldg 735-A, Aiken, SC 29808 USA. EM stephen.lamont@srs.gov NR 4 TC 23 Z9 24 U1 1 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 423 EP 427 DI 10.1007/s10967-005-0732-7 PG 5 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700026 ER PT J AU Bandong, BB Kreek, SA Bazan, JM Torretto, PC Dixon, JA Edwards, WL Guthrie, EB Ruth, MA Zaka, FA Hall, HL AF Bandong, BB Kreek, SA Bazan, JM Torretto, PC Dixon, JA Edwards, WL Guthrie, EB Ruth, MA Zaka, FA Hall, HL TI Validation of a gamma-spectrometric method for the measurement of Ra-262,Ra-228 in environmental media relevant to the offshore oil and gas industry SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID SAMPLES AB The offshore production of oil and gas leads to naturally occurring Ra-226,Ra-228 being brought to the surface along with produced water. Assessment of potential environmental exposures, if any, requires accurate, precise and practical methods for the measurement of low concentrations of Ra-226,Ra-228. A method for the simultaneous measurement of Ra-226,Ra-228 in marine sediments, biota and produced water at a sensitivity of 0.01 pCi/g using high-sensitivity, high-resolution gamma-spectrometry was subjected to an interlaboratory exercise using U.S. commercial laboratories to validate its accuracy, precision, robustness, and sample throughput. The prescribed method involves direct counting for solid samples and a simple Pb(Ba-133,Ra)SO4 co-precipitation procedure for water samples followed by gamma-counting. Analytical results received from the participating laboratories were subjected to data analysis and statistical evaluation to validate the overall performance of the prescribed method. Relatively good precision and high accuracy of data were achieved when the participating laboratories followed the prescribed procedure closely. The consistency of results among laboratories was not correlated to the Ra-226,Ra-228 concentrations in the samples. Most of the results that failed the acceptance criteria were either due to the absence of geometric and secular equilibrium between Ra-226 and its signature decay daughters, or due to insufficient counting statistics when laboratories are working close to their detection limits. No significant bias or systematic errors were observed, except for produced water samples where results were biased high compared to the known values. C1 Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94551 USA. RP Bandong, BB (reprint author), Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94551 USA. EM bandongl@llnl.gov OI Hall, Howard/0000-0002-4080-5159 NR 9 TC 3 Z9 3 U1 1 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 429 EP 435 DI 10.1007/s10967-005-0733-6 PG 7 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700027 ER PT J AU Dion, HM Romanek, CS Hinton, TG Bertsch, PM AF Dion, HM Romanek, CS Hinton, TG Bertsch, PM TI Cesium-137 in floodplain sediments of the Lower Three Runs Creek on the DOE Savannah River Site SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID CS-133 NMR; RADIOCESIUM; SOILS; MOBILIZATION; WATER; RESERVOIR; FIXATION AB The legacy of nuclear weapons production has resulted in vast tracks of land contaminated with fission products, mainly Cs-137, and at the U.S. Department of Energy's Savannah River Site (SRS) alone there is over 120 km(2) of land contaminated with low-levels of Cs-137. Soils on the SRS are highly weathered and dominated by sand-sized quartz grains with the clay fraction consisting primarily of kaolinite and crystalline and poorly crystalline iron oxides (<5%). Our results showed that the majority of Cs-137 in the Lower Three Runs Creek floodplain were retained in the sand-sized fraction (>52 mu m) of the soil. Frayed edge site measurements were performed in order to probe the interaction between Cs-137 and the sand fraction, with the results indicating that the vast majority of the Cs-137 was strongly retained and existed in the residual fraction. These results prompted examination into the mineralogy of the soils in a hope to elucidate the mechanisms of Cs-137 retention by the sand fraction. The results from this study provide new evidence for selective retention of Cs-137 in larger-grained particles than previously demonstrated. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Dion, HM (reprint author), Univ Georgia, Savannah River Ecol Lab, Drawer E, Aiken, SC 29802 USA. EM hdion@lanl.gov NR 26 TC 5 Z9 5 U1 1 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 481 EP 488 DI 10.1007/s10967-005-0741-6 PG 8 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700035 ER PT J AU Ding, M AF Ding, M TI Radiotracer method in study of reactive transport across chemical gradients in porous media SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID INTERFACE; DYNAMICS AB Modeling and experimental approaches to study reactive transport across chemical gradients in porous media are presented. Particular emphasis is placed on a purposeful experimental setup to obtain information necessary for model calibration and verification. As example, diffusion tube experiments on the layered acidic jarosite/alkaline coal fly ash system have been carried out using radiotracers H-3(+), Na-22(+), and Fe-59(3+). Such radiotracer diffusion tube experiments provide modelers with reliable information incorporating some of the complexities observed in the environment such as local heterogeneities. C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Ding, M (reprint author), Los Alamos Natl Lab, Div Chem, MS J514, Los Alamos, NM 87545 USA. EM mding@lanl.gov NR 27 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 489 EP 494 DI 10.1007/s10967-005-0742-5 PG 6 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700036 ER PT J AU Egorov, O O'Hara, MJ Grate, JW Knopf, M Anderson, G Hartman, J AF Egorov, O O'Hara, MJ Grate, JW Knopf, M Anderson, G Hartman, J TI Radiochemical sensor system for the analysis of Tc-99(VII) in groundwater SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID SOLID-PHASE EXTRACTION AB Direct determination of Tc-99 in groundwater using a sensor device represents a substantial challenge due to the short range of beta-particles, the presence of radiological interferences, and low-level detection requirements. This paper describes a radiochemical sensing method for selective detection of Tc-99(VII) in water. The sensing approach uses a dual-function composite sensor microcolumn that incorporates both selective sorption and scintillating properties. Analyte detection is carried out in a reagentless equilibration sensing regime using chemically unmodified groundwater. The sensor method was implemented in a prototypical probe device that integrates the sensor element, scintillation detection, data acquisition, and instrument control components in a single functional instrument compatible with a 3.5" well casing geometry. The feasibility of rapid Tc-99 analysis in Hanford groundwater (Hanford Site, USA) below regulatory drinking water level of 33 Bq/l was demonstrated. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Egorov, O (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM oleg.egorov@pnl.gov RI O'Hara, Matthew/I-4967-2013; OI O'Hara, Matthew/0000-0003-3982-5897 NR 6 TC 4 Z9 5 U1 0 U2 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAY PY 2005 VL 264 IS 2 BP 495 EP 500 DI 10.1007/s10967-005-0743-4 PG 6 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 918CO UT WOS:000228516700037 ER PT J AU Seo, PN Bowman, JD Gericke, M Gillis, RC Greene, GL Leuschner, MB Long, J Mahurin, R Mitchell, GS Penttila, SI Peralta, G Sharapov, EI Wilburn, WS AF Seo, PN Bowman, JD Gericke, M Gillis, RC Greene, GL Leuschner, MB Long, J Mahurin, R Mitchell, GS Penttila, SI Peralta, G Sharapov, EI Wilburn, WS TI New pulsed cold neutron beam line for fundamental nuclear physics at LANSCE SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE hydrogen moderator; moderator brightness; neutron capture; neutron guide; polarized neutrons; spallation neutron source AB The NPDGamma collaboration has completed the construction of a pulsed cold neutron beam line on flight path12 at the Los Alamos Neutron Science Center (LANSCE). We describe the new beam line and characteristics of the beam. We report results of the moderator brightness and the guide performance measurements. FP12 has the highest pulsed cold neutron intensity for nuclear physics in the world. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Manitoba, Winnipeg, MB R3T 2N2, Canada. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. Joint Inst Nucl Res, Dubna, Russia. RP Seo, PN (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 8 TC 5 Z9 5 U1 0 U2 3 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 2005 VL 110 IS 3 BP 145 EP 148 DI 10.6028/jres.110.014 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000003 PM 27308111 ER PT J AU Greene, G Cianciolo, V Koehler, P Allen, R Snow, WM Huffman, P Gould, C Bowman, D Cooper, M Doyle, J AF Greene, G Cianciolo, V Koehler, P Allen, R Snow, WM Huffman, P Gould, C Bowman, D Cooper, M Doyle, J TI The fundamental neutron physics beamline at the spallation neutron source SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE fundamental neutron physics; neutron source; spallation neutron source AB The Spallation Neutron Source (SNS), currently under construction at Oak Ridge National Laboratory with an anticipated start-up in early 2006, will provide the most intense pulsed beams of cold neutrons in the world. At a projected power of 1.4 MW, the time averaged fluxes and fluences of the SNS will approach those of high flux reactors. One of the flight paths on the cold, coupled moderator will be devoted to fundamental neutron physics. The fundamental neutron physics beamline is anticipated to include two beam-lines; a broad band cold beam, and a monochromatic beam of 0.89 nm neutrons for ultracold neutron (UCN) experiments. The fundamental neutron physics beamline will be operated as a user facility with experiment selection based on a peer reviewed proposal process. An initial program of five experiments in neutron decay, hadronic weak interaction and time reversal symmetry violation have been proposed. C1 Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Indiana Univ, Bloomington, IN USA. N Carolina State Univ, Raleigh, NC 27695 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Harvard Univ, Cambridge, MA 02138 USA. RP Greene, G (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. RI Gould, Christopher/M-7676-2013; OI Huffman, Paul/0000-0002-2562-1378; Koehler, Paul/0000-0002-6717-0771; cianciolo, thomas vincent/0000-0002-9441-3222 NR 1 TC 5 Z9 5 U1 0 U2 4 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 2005 VL 110 IS 3 BP 149 EP 152 DI 10.6028/jres.110.015 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000004 PM 27308112 ER PT J AU Mahurin, R Greene, G Kohler, P Cianciolo, V AF Mahurin, R Greene, G Kohler, P Cianciolo, V TI Simulation of the performance of a fundamental neutron physics beamline at the high flux isotope reactor SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE neutron optics; beamline simulation AB We study the expected performance of the proposed fundamental neutron physics beamline at the upgraded High Flux Isotope Reactor at Oak Ridge National Laboratory. A curved neutron guide transmits the neutrons from the new cold source into a guide hall. A novel feature of the proposed guide is the use of vertical focussing to increase the flux for experiments that require relatively small cross-section beams. We use the simulation code IB to model straight, multi-channel curved, and tapered guides of various m values. Guide performance for the current NPDGamma and proposed abBA experiments is evaluated. C1 Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Mahurin, R (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. EM rob@utk.edu NR 2 TC 1 Z9 1 U1 0 U2 3 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 2005 VL 110 IS 3 BP 157 EP 160 DI 10.6028/jres.110.017 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000006 PM 27308114 ER PT J AU Huffman, PR Greene, GL Allen, RR Cianciolo, V Huerto, RR Koehler, P Desai, D Mahurin, R Yue, A Palmquist, GR Snow, WM AF Huffman, PR Greene, GL Allen, RR Cianciolo, V Huerto, RR Koehler, P Desai, D Mahurin, R Yue, A Palmquist, GR Snow, WM TI Beamline performance simulations for the fundamental neutron physics beamline at the spallation neutron source SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE McStas; neutron optics; neutron sources AB Monte Carlo simulations are being performed to design and characterize the neutron optics components for the two fundamental neutron physics beamlines at the Spallation Neutron Source. Optimization of the cold beamline includes characterization of the guides and benders, the neutron transmission through the 0.89 nm mono-chromator, and the expected performance of the four time-of-flight choppers. The locations and opening angles of the choppers have been studied using a simple spreadsheet-based analysis that was developed for other SNS chopper instruments. The spreadsheet parameters are then optimized using Monte Carlo techniques to obtain the results presented in this paper. Optimization of the 0.89 nm beamline includes characterizing the double crystal monochromator and the downstream guides. The simulations continue to be refined as components are ordered and their exact size and performance specifications are determined. C1 N Carolina State Univ, Raleigh, NC 27695 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Univ Tennessee, Knoxville, TN USA. Indiana Univ, Bloomington, IN USA. RP Huffman, PR (reprint author), N Carolina State Univ, Raleigh, NC 27695 USA. OI Huffman, Paul/0000-0002-2562-1378; Koehler, Paul/0000-0002-6717-0771 NR 3 TC 3 Z9 3 U1 1 U2 5 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 2005 VL 110 IS 3 BP 161 EP 168 DI 10.6028/jres.110.018 PG 8 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000007 PM 27308115 ER PT J AU Page, SA Bowman, JD Carlini, RD Case, T Chupp, TE Coulter, KP Dabaghyan, M Desai, D Freedman, SJ Gentile, TR Gericke, MT Gillis, RC Greene, GL Hersman, FW Ino, T Ishimoto, S Jones, GL Lauss, B Leuschner, MB Losowski, B Mahurin, R Masuda, Y Mitchell, GS Nann, H Penttila, SI Ramsay, WD Santra, S Seo, PN Sharapov, EI Smith, TB Snow, WM Wilburn, WS Yuan, V Zhu, H AF Page, SA Bowman, JD Carlini, RD Case, T Chupp, TE Coulter, KP Dabaghyan, M Desai, D Freedman, SJ Gentile, TR Gericke, MT Gillis, RC Greene, GL Hersman, FW Ino, T Ishimoto, S Jones, GL Lauss, B Leuschner, MB Losowski, B Mahurin, R Masuda, Y Mitchell, GS Nann, H Penttila, SI Ramsay, WD Santra, S Seo, PN Sharapov, EI Smith, TB Snow, WM Wilburn, WS Yuan, V Zhu, H TI Measurement of parity violation in np capture: the NPDGamma experiment SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE hadronic weak interaction; neutron capture; parity violation ID GAMMA-RAY; SEARCH; F-18 AB The NPDGamma experiment will measure the parity-violating directional gamma ray asymmetry A(gamma) in the reaction (n) over right arrow + p --> d + gamma. Ultimately, this will constitute the first measurement in the neutron-proton system that is sensitive enough to challenge modern theories of nuclear parity violation, providing a theoretically clean determination of the weak pion-nucleon coupling. A new beamline at the Los Alamos Neutron Science Center (LANSCE) delivers pulsed cold neutrons to the apparatus, where they are polarized by transmission through a large volume polarized He-3 spin filter and captured in a liquid para-hydrogen target. The 2.2 MeV gamma rays from the capture reaction are detected in an array of CsI(Tl) scintillators read out by vacuum photodiodes operated in current mode. We will complete commissioning of the apparatus and carry out a first measurement at LANSCE in 2004-05, which would provide a statistics-limited result for A gamma accurate to a standard uncertainty of +/- 5 x 10(-8) level or better, improving on existing measurements in the neutron-proton system by a factor of 4. Plans to move the experiment to a reactor facility, where the greater flux would enable us to make a measurement with a standard uncertainty of +/- 1 x 10(-8), are actively being pursued for the longer term. C1 Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Univ New Hampshire, Durham, NH 03824 USA. Univ Tennessee, Knoxville, TN 37996 USA. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. KEK Nat Lab High Energy Phys, Tsukuba, Ibaraki 3050801, Japan. Hamilton Coll, Clinton, NY 13323 USA. Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA. Joint Inst Nucl Res, Dubna, Russia. Univ Dayton, Dayton, OH 45469 USA. RP Page, SA (reprint author), Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada. NR 9 TC 4 Z9 4 U1 0 U2 2 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 2005 VL 110 IS 3 BP 195 EP 203 DI 10.6028/jres.110.024 PG 9 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000013 PM 27308121 ER PT J AU Gericke, MT Bowman, JD Carlini, RD Chupp, TE Coulter, KP Dabaghyan, M Desai, D Freedman, SJ Gentile, TR Gillis, RC Greene, GL Hersman, FW Ino, T Ishimoto, S Jones, GL Lauss, B Leuschner, MB Losowski, B Mahurin, R Masuda, Y Mitchell, GS Muto, S Nann, H Page, SA Penttila, SI Ramsay, WD Santra, S Seo, PN Sharapov, EI Smith, TB Snow, WM Wilburn, WS Yuan, V Zhu, H AF Gericke, MT Bowman, JD Carlini, RD Chupp, TE Coulter, KP Dabaghyan, M Desai, D Freedman, SJ Gentile, TR Gillis, RC Greene, GL Hersman, FW Ino, T Ishimoto, S Jones, GL Lauss, B Leuschner, MB Losowski, B Mahurin, R Masuda, Y Mitchell, GS Muto, S Nann, H Page, SA Penttila, SI Ramsay, WD Santra, S Seo, PN Sharapov, EI Smith, TB Snow, WM Wilburn, WS Yuan, V Zhu, H TI Commissioning of the NPDGamma detector array: Counting statistics in current mode operation and parity violation in the capture of cold neutrons on B4C and Al-27 SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE CsI; current mode; detector; gamma; neutron capture; parity violation AB NPDGamma gamma-ray detector has been built to measure, with high accuracy, the size of the small parity-violating asymmetry in the angular distribution of gamma rays from the capture of polarized cold neutrons by protons. The high cold neutron flux at the Los Alamos Neutron Scattering Center (LANSCE) spallation neutron source and control of systematic errors require the use of current mode detection with vacuum photodiodes and low-noise solid-state preamplifiers. We show that the detector array operates at counting statistics and that the asymmetries due to B4C and Al-27 are zero to within 2 x 10(-6) and 7 x 10(-7), respectively. Boron and aluminum are used throughout the experiment. The results presented here are preliminary. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Indiana Univ, Bloomington, IN 47405 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Univ Michigan, Ann Arbor, MI 48104 USA. Univ New Hampshire, Durham, NH 03824 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Univ Manitoba, Winnipeg, MB R3T 2N2, Canada. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. High Energy Accelerator Res Org, Tukubash 3050801, Japan. Hamilton Coll, Clinton, NY 13323 USA. TRIUMF, Vancouver, BC V6T 2A3, Canada. Joint Inst Nucl Res, Dubna, Russia. Univ Dayton, Dayton, OH 45469 USA. RP Gericke, MT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 8 TC 6 Z9 6 U1 2 U2 5 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 2005 VL 110 IS 3 BP 215 EP 219 DI 10.6028/jres.110.027 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000016 PM 27308124 ER PT J AU Penttila, SI Bowman, JD AF Penttila, SI Bowman, JD TI Precision neutron polarimetry for neutron beta decay SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Precision Measurements with Slow Neutrons CY APR 05-07, 2004 CL Natl Inst Stand & Technol, Gaithersburg, MD HO Natl Inst Stand & Technol DE neutron beta decay; neutron polarimetry; neutron time of flight; neutron polarization AB The abBA collaboration is developing a new type of field-expansion spectrometer for a measurement of the three correlation coefficients a, A, and B and the shape parameter b. The measurement of A and B requires precision neutron polarimetry. We will polarize a pulsed cold neutron beam from the SNS using a He-3 neutron spin filter. The well-known polarizing cross section for n-He-3 has a 1/v dependence, where v is the neutron velocity, which is used to determine the absolute beam polarization through a time-of-flight (TOF) measurement. We show that by measuring the TOF dependence of A and B, the coefficients and the neutron polarization can be determined with a small loss of the statistical precision and with negligible systematic error. We conclude that it is possible to determine the neutron polarization averaged over a long run in the neutron beta decay experiment with a statistical error less than 10(-4). We discuss various sources of systematic uncertainty in the measurement of A and B and conclude that the fractional systematic errors are less than 2 x 10(-4). C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Penttila, SI (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 2 TC 3 Z9 3 U1 0 U2 3 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 2005 VL 110 IS 3 BP 309 EP 313 DI 10.6028/jres.110.045 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 943XN UT WOS:000230389000034 PM 27308142 ER PT J AU Berg, DE Chaviaropoulos, PT AF Berg, DE Chaviaropoulos, PT TI Notes from the Associate Editors SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Editorial Material C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. CRES, Pikermi, Greece. RP Berg, DE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM deberg@sandia.gov; tchaviar@CRES.gr NR 0 TC 0 Z9 0 U1 0 U2 0 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 2005 VL 127 IS 2 BP 169 EP 169 DI 10.1115/1.1866143 PG 1 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 930KK UT WOS:000229414500001 ER PT J AU Gerber, BS Tangler, JL Duque, EPN Kocurek, JD AF Gerber, BS Tangler, JL Duque, EPN Kocurek, JD TI Peak and post-peak power aerodynamics from phase VINASA Ames wind turbine data SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Constant speed/pitch rotor operation lacks adequate theory for predicting peak and post-peak power The objective of this study was to identify and quantify, how measured blade element performance characteristics from the Phase VI NASA Ames 24 M x 36 m (80 ft x 120 ft) wind tunnel test of a two-bladed, tapered, twisted rotor relate to the prediction of peak and post-peak rotor power The performance prediction code, NREL's Lifting Surface Prescribed Wake code (LSWT), was used to study the flow physics along the blade. Airfoil lift and drag coefficients along the blade were derived using the predicted angle of attack distribution from LSWT and Phase VI measured normal and tangential force coefficients. Through successive iterations, the local lift and drag coefficients were modified until agreement was achieved between the predicted and Phase VI measured normal and tangential force coefficients along the blade. This agreement corresponded to an LSWT angle of attack distribution and modified airfoil data table that reflected the measured three-dimensional aerodynamics. This effort identified five aerodynamic events important to the prediction of peak and post-peak power The most intriguing event was a rapid increase in drag that corresponds with the occurrence of peak power This is not currently modeled in engineering performance prediction methods. C1 GE Co, GE Energy, Greenville, SC 29602 USA. Natl Wind Technol Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA. No Arizona Univ, Dept Mech Engn, Flagstaff, AZ 86011 USA. Computat Methodol Assoc, Colleyville, TX 76023 USA. RP Gerber, BS (reprint author), GE Co, GE Energy, GTTC-100D,POB 648, Greenville, SC 29602 USA. EM brandon.gerber@ge.com; james_tangler@nrel.gov; Earl.Duque@NAU.EDU; drtomcat@msn.com NR 12 TC 5 Z9 5 U1 0 U2 1 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 2005 VL 127 IS 2 BP 192 EP 199 DI 10.1115/1.1862260 PG 8 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 930KK UT WOS:000229414500005 ER PT J AU Kennedy, CE Terwilliger, K AF Kennedy, CE Terwilliger, K TI Optical durability of candidate solar reflectors SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article DE glass mirrors; aluminized mirrors; silvered polymer mirrors; front surface reflector; optical durability AB Concentrating solar power (CSP) technologies use large mirrors to collect sunlight to convert thermal energy to electricity. The viability of CSP systems requires the development of advanced reflector materials that are low in cost and maintain high specular reflectance for extended lifetimes under severe outdoor environments. The long-standing goals,for a solar reflector are specular reflectance above 90% into a 4 mrad half-cone angle for at least 10 years outdoors with a cost of less than $13.8/m(2) (the 1992 $10.8/m(2) goal corrected for inflation to 2002 dollars) when manufactured in large volumes. Durability testing of a variety, of candidate solar reflector materials at outdoor test sites and in laboratory accelerated weathering chambers is the main activity within the Advanced Materials task of the CSP Program at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Test results to date for several candidate solar reflector materials will be presented. These include the optical durability of thin glass, thick glass, aluminized reflectors, front-surface mirrors, and silvered polymer mirrors. The development, performance, and durability of these materials will be discussed. Based on accelerated exposure testing the glass, silvered polymer and front-surface mirrors may meet the 10 year lifetime goals, but at this time because of significant process changes none of the commercially available solar reflectors and advanced solar reflectors have demonstrated the 10 year or more aggressive 20 year lifetime goal. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Kennedy, CE (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd M-S 3321, Golden, CO 80401 USA. EM cheryl_kennedy@nrel.gov; kent_terwilliger@nrel.gov NR 26 TC 42 Z9 42 U1 0 U2 17 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 2005 VL 127 IS 2 BP 262 EP 269 DI 10.1115/1.1861926 PG 8 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 930KK UT WOS:000229414500013 ER PT J AU Kennedy, CE Swisher, RL AF Kennedy, CE Swisher, RL TI Cost analysis of solar reflective hard-coat materials deposited by ion-beam-assisted deposition SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT International Solar Energy Conference CY JUL 01-14, 2004 CL Portland, OR DE alumina; Al2O3; cost analysis; front surface reflector; IBAD; roll coater AB Commercialization of concentrating solar power (CSP) technologies require the development of advanced reflector materials that are low cost and maintain high specular reflectance for extended lifetimes under severe outdoor environments. During the past nine years, the National Renewable Energy Laboratory (NREL) has funded Science Applications International Corporation (SAIC) in McLean, Virginia, to develop a promising low-cost advanced solar reflective material (ASRM) combining the best of both thin-glass and silvered-polymer reflectors. The alumina (Al2O3) coating is deposited by ion-beam-assisted physical vapor deposition (IBAD). Materials undergoing testing demonstrate excellent durability under accelerated and outdoor weathering. To help commercialize the technology, NREL had a cost analysis performed incorporating realistic web coating assumptions and the technical improvements made in the ASRM. The biggest process cost items are the alumina and machine burden (which collects the cost of the building and office staff). The switch from a polyethylene terethaphalate (PET) to a steel substrate for the ASRM is a significant contributor to the cost. The cost of high-purity alumina should drop from $400 to $200/kg when purchased in 20 kg quantities. Alumina deposition rate then becomes the critical cost driver. In a previous study, deposition rates above 100 nm/s were not examined, but deposition rates greater than 100 nm/s are being used routinely,for thin alumina coatings deposited on commercial web-coaters as barrier coatings. In addition, multiple (2-3) Al2O3 MAD zones can be used in one roll-coating machine to deposit thicker alumina at a lower web speed. This means that with increasing deposition rate and/or multiple zones, the total production cost of the SAIC ASRM with 1 mu m thick Al2O3 on PET will meet both the 1992 cost goal of $10.76/m(2) ($1/ft(2)) and the equivalent cost goal of $13.791/m(2) ($1.3/ft(2)) when the 1992 cost goal is corrected for inflation. There is a minimum deposition rate needed to reach the cost goal and a maximum deposition rate related to the number of zones after which no significant cost gains are observed. These asymptotic total production costs are $8.06/m(2) ($7.39/m(2) excluding substrate) for a large commercial web-coating company and $7.62/m(2) ($6 94/m(2) excluding substrate),for a smaller company. As can be seen by these numbers, the $10.76/m(2) cost goal can be reached, but the cost of the substrate is still a major consideration. In addition, the width of the web was increased from 600 to 1200 mm, which decreased the asymptotic total production costs. The results of the cost analysis will be described. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Swisher & Assoc, Northfield, MN 55057 USA. RP Kennedy, CE (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd M-S 3321, Golden, CO 80401 USA. EM cheryl_kennedy@nrel.gov; rswisher@deskmedia.com NR 13 TC 1 Z9 1 U1 0 U2 9 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 2005 VL 127 IS 2 BP 270 EP 276 DI 10.1115/1.1861925 PG 7 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 930KK UT WOS:000229414500014 ER PT J AU Miller, VL Lee, WL Lawes, G Ong, NP Cava, RJ AF Miller, VL Lee, WL Lawes, G Ong, NP Cava, RJ TI Synthesis and properties of the Co7Se8-xSx and Ni7Se8-xSx solid solutions SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article DE Co7Se8-xSx; Ni7Se8-xSx; cobalt and nickel chalcogenides; magnetic properties ID SR2RUO4 AB We report the synthesis and elementary properties of the Co7Se8-xSx (X = 0-8) and Ni7Se8-xSx (x = 0-7) solid solutions. Both systems form a NiAs-type structure with metal vacancies. In general, the lattice parameters decrease with increasing x, but in the Ni7Se8-xSx system c increases on going from x = 5 to 7. Magnetic susceptibility measurements show that all samples exhibit temperature-independent paramagnetism from 25-250 K. Samples within the Co7Se8-xSx system, as well as Ni7Se8 and Ni7SeS7, were found to be poor metals with resistivities of &SIM; 0.20 and &SIM; 0.06 m&UOmega; cm at 300 K, respectively. The Sornmerfeld constant (γ) was determined from specific heat measurements to be &SIM; 13mJ/mol(Co)K(2) and &SIM; 7 mJ/mol(Co)K(2) for Co7Se8-xSx and Ni7Se8-xSx, respectively. © 2004 Elsevier Inc. All rights reserved. C1 Princeton Univ, Dept Chem, Frick Chem Lab, Princeton, NJ 08544 USA. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Miller, VL (reprint author), Princeton Univ, Dept Chem, Frick Chem Lab, Washington Rd, Princeton, NJ 08544 USA. EM vmiller@princeton.edu NR 18 TC 8 Z9 8 U1 1 U2 3 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 2005 VL 178 IS 5 BP 1508 EP 1512 DI 10.1016/j.jssc.2004.11.013 PG 5 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA 923UM UT WOS:000228934800021 ER PT J AU Kertesz, V Van Berkel, GJ AF Kertesz, V Van Berkel, GJ TI Monitoring ionic adducts to elucidate reaction mechanisms: reduction of tetracyanoquinodimethane and oxidation of triphenylamine investigated using on-line electrochemistry/electrospray mass spectrometry SO JOURNAL OF SOLID STATE ELECTROCHEMISTRY LA English DT Article DE tetracyanoquinodimethane; triphenylamine; electrospray mass spectrometry; charge-transfer complex; ion pair ID CONDUCTIVE ORGANIC SOLIDS; ELECTRON-SPIN-RESONANCE; POLYMER FILM ELECTRODES; CATION RADICALS; COUPLED ONLINE; RATE CONSTANTS; ANION; SPECTROELECTROCHEMISTRY; DIMERIZATION; COUNTERIONS AB The products of the electrochemical reduction of 7,7',8,8'-tetracyano-p-quinodimethane (TCNQ) and the electrochemical oxidation of triphenylamine (TPA) were studied using a thin-layer flow cell coupled upstream on-line with electrospray mass spectrometry. Linear sweep voltammetry was used to generate intermediates and products of reduction/oxidation that were monitored by mass spectrometry in negative/positive ion mode, respectively. During reduction of TCNQ the potential dependence of the radical anion, the single-charge and the double-charge charge-transfer complexes and the double-charge anion were determined. The data provided direct evidence that following the first electron transfer practically all radical anions turn into the [TCNQ(2)(2-)+Li+](-) adduct. The adduct formation could be observed also in case of the double-charge anion, forming [TCNQ(2-)+Li+](-) during/after the second electron transfer. Similarly, in the case of TPA the potential dependence of the radical cations of the monomer/dimer and the double-charge dimer were evaluated. Results on TPA oxidation suggested the formation of [TPA-H](+) that can originate from TPA(.+) by consecutive proton and electron loss. The existence of [TPA-H](+) was confirmed by close inspection of the mass spectrometric peak shapes around m/z 244 and by simulation and mathematical evaluation of the measured data. However, monitoring the adducts of doubly (multiply) charged ions with oppositely charged ion(s) resulting in single-charge ions has proven to be a useful method to get relevant information about the doubly (multiply) charged ions when mass signal interference occurs between double-charge dimer and single-charge monomer molecules that have very close or equal m/z values. Moreover, in each case (reduction and oxidation) the results proved again that the electrochemistry/electrospray mass spectrometry technique is capable of monitoring reactions with complex reaction paths. C1 Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA. RP Kertesz, V (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA. EM kerteszv@ornl.gov RI Kertesz, Vilmos/M-8357-2016 OI Kertesz, Vilmos/0000-0003-0186-5797 NR 51 TC 17 Z9 17 U1 2 U2 19 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1432-8488 J9 J SOLID STATE ELECTR JI J. Solid State Electrochem. PD MAY PY 2005 VL 9 IS 5 BP 390 EP 397 DI 10.1007/s10008-004-0611-0 PG 8 WC Electrochemistry SC Electrochemistry GA 931RZ UT WOS:000229504200020 ER PT J AU Barre, J Bouchet, F Dauxois, T Ruffo, S AF Barre, J Bouchet, F Dauxois, T Ruffo, S TI Large deviation techniques applied to systems with long-range interactions SO JOURNAL OF STATISTICAL PHYSICS LA English DT Article DE long-range interactions; large deviation; techniques; mean-field limit ID STATISTICAL-MECHANICS; PHASE-TRANSITIONS; MICROCANONICAL SOLUTION; EULER EQUATIONS; MODEL; DIMENSIONS; ROTATORS; ENSEMBLE; LATTICE; STATES AB We discuss a method to solve models with long-range interactions in the microcanonical and canonical ensemble. The method closely follows the one introduced by R.S. Ellis, Physica D 133:106 (1999), which uses large deviation techniques. We show how it can be adapted to obtain the solution of a large class of simple models, which can show ensemble inequivalence. The model Hamiltonian can have both discrete (Ising, Potts) and continuous (HMF, Free Electron Laser) state variables. This latter extension gives access to the comparison with dynamics and to the study of non-equilibrium effects. We treat both infinite range and slowly decreasing interactions and, in particular, we present the solution of the alpha-Ising model in one-dimension with 0 <= alpha < 1. C1 Ecole Normale Super Lyon, Phys Lab, CNRS, UMR 5672, F-69364 Lyon, France. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Florence, Dipartimento Energet, I-50139 Florence, Italy. Univ Florence, CSDC, I-50139 Florence, Italy. Ist Nazl Fis Nucl, I-50139 Florence, Italy. RP Barre, J (reprint author), Ecole Normale Super Lyon, Phys Lab, CNRS, UMR 5672, 46 Allee Italie, F-69364 Lyon, France. EM thierry.dauxois@ens-lyon.fr OI Ruffo, Stefano/0000-0003-2911-8718 NR 53 TC 76 Z9 77 U1 2 U2 6 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-4715 J9 J STAT PHYS JI J. Stat. Phys. PD MAY PY 2005 VL 119 IS 3-4 BP 677 EP 713 DI 10.1007/s10955-005-3768-8 PG 37 WC Physics, Mathematical SC Physics GA 937DN UT WOS:000229904900008 ER PT J AU Meziani, MJ Pathak, P Beacham, F Allard, LF Sun, YP AF Meziani, MJ Pathak, P Beacham, F Allard, LF Sun, YP TI Nanoparticle formation in rapid expansion of water-in-supercritical carbon dioxide microemulsion into liquid solution SO JOURNAL OF SUPERCRITICAL FLUIDS LA English DT Article DE silver nanoparticles; water-in-CO(2) microemulsion; RESOLV ID ANGLE NEUTRON-SCATTERING; AQUEOUS-SOLUTION; WATER-IN-CO2 MICROEMULSIONS; SILVER NANOPARTICLES; FLUID SOLUTIONS; SOLUTIONS RESS; PARTICLES; CO2; STABILIZATION; SOLVENTS AB Silver nanoparticles were produced in the Rapid Expansion of a Supercritical Solution into a Liquid SOLVent (RESOLV). Perfluorinated surfactant-stabilized water-in-CO(2) microemulsion was used to dissolve silver salt for the rapid expansion. It was found that well-behaved nanocrystalline silver particles could be obtained when the reductive solution at the receiving end of the rapid expansion was adjusted to be highly basic. The results suggest that the pre-expansion reverse micelles in the microemulsion might be playing a significant role in the formation of the nanoparticles and that such a role could be affected by the basicity of the receiving solution in RESOLV. The apparent correlation between the parameters of the pre-expansion microemulsion and the properties of the produced nanoparticles is discussed. (c) 2004 Elsevier B.V. All rights reserved. C1 Clemson Univ, Howard L Hunter Chem Lab, Dept Chem, Clemson, SC 29634 USA. Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA. RP Sun, YP (reprint author), Clemson Univ, Howard L Hunter Chem Lab, Dept Chem, Clemson, SC 29634 USA. EM syaping@clemson.edu NR 40 TC 22 Z9 23 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0896-8446 J9 J SUPERCRIT FLUID JI J. Supercrit. Fluids PD MAY PY 2005 VL 34 IS 1 BP 91 EP 97 DI 10.1016/j.supflu.2004.10.005 PG 7 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 923AT UT WOS:000228881700010 ER PT J AU Gonzalez, A von Delft, F Liddington, RC Bakolitsa, C AF Gonzalez, A von Delft, F Liddington, RC Bakolitsa, C TI Two-wavelength MAD phasing and radiation damage: a case study SO JOURNAL OF SYNCHROTRON RADIATION LA English DT Article DE two-wavelength MAD; radiation damage; vinculin ID X-RAY-DIFFRACTION; PROTEIN CRYSTALS; MACROMOLECULAR CRYSTALLOGRAPHY; VINCULIN; ADHESION; CRYOCRYSTALLOGRAPHY AB Radiation damage affects MAD experiments in two ways: (i) increased absorption by the crystal at the wavelengths of interest for the experiment results in faster crystal deterioration; (ii) lack of isomorphism induced by radiation damage causes problems when scaling and merging data at different wavelengths and can prevent accurate measurement of anomalous and dispersive differences. In an attempt to overcome these problems in the case of radiation-sensitive crystals of vinculin, two-wavelength MAD data were collected at the Se absorption-edge inflection and at high-energy remote wavelengths. Although this strategy resulted in a lower total absorbed dose compared with a standard three-wavelength experiment using the peak wavelength, an increase in the unit-cell volume and other effects attributable to radiation damage were still observed. In an effort to extract the maximum information available from the data, different data-processing and scaling procedures were compared. Scaling approaches involving local scaling of unmerged reflections were consistently successful and most ordered Se sites could be located. Subsequent use of these sites for phasing resulted in an interpretable electron density map. This case demonstrates the feasibility of two-wavelength MAD in the presence of moderate radiation damage using conventional data collection strategies and widely available standard software. C1 Burnham Inst, La Jolla, CA 92037 USA. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Syrrx Inc, San Diego, CA 92121 USA. RP Bakolitsa, C (reprint author), Burnham Inst, 10901 N Torrey Pines Rd, La Jolla, CA 92037 USA. EM bakolitsa@burnham.org NR 38 TC 9 Z9 9 U1 0 U2 2 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0909-0495 J9 J SYNCHROTRON RADIAT JI J. Synchrot. Radiat. PD MAY PY 2005 VL 12 BP 285 EP 291 DI 10.1107/S0909049505003249 PN 3 PG 7 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA 916BI UT WOS:000228357800005 PM 15840912 ER PT J AU Lehman, SK AF Lehman, SK TI Hilbert space inverse wave imaging in a planar multilayer environment SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID MEDIA; PROPAGATION; REFLECTION AB Most diffraction tomography (DT) algorithms use a homogeneous Green function (GF) regardless of the medium being imaged. This choice is usually motivated by practical considerations: analytic inversions in standard geometries (Cartesian, spherical, etc.) are significantly simplified by the use of a homogeneous GF, estimating a nonhomogeneous GF can be very difficult, as can incorporating a nonhomogeneous GF into standard DT algorithms. Devaney has circumvented these issues by developing a purely numerical DT inversion algorithm [A. J. Devaney and M. Dennison, Inverse Probl. 19, 855-870 (2003)] that is independent of measurement system geometry, number of frequencies used in the reconstruction, and GF. A planar multilayer GF has been developed for use in Devaney's "Hilbert space" algorithm and used in a proof-of-principle nondestructive evaluation (NDE) experiment to image noninvasively a flaw in an aluminum/copper planar multilayer medium using data collected from an ultrasonic measurement system. The data were collected in a multistatic method with no beamforming: all focusing through the multilayer was performed mathematically "after-the-fact," that is, after the data were collected. © 2005 Acoustical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lehman, SK (reprint author), Lawrence Livermore Natl Lab, L-154,7000 East Ave, Livermore, CA 94550 USA. EM lehman2@llnl.gov NR 16 TC 2 Z9 2 U1 0 U2 0 PU ACOUSTICAL SOC AMER AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAY PY 2005 VL 117 IS 5 BP 2929 EP 2936 DI 10.1121/1.1879172 PG 8 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA 925QV UT WOS:000229068700028 PM 15957763 ER PT J AU Kalinin, SV Shao, R Bonnell, DA AF Kalinin, SV Shao, R Bonnell, DA TI Local phenomena in oxides by advanced scanning probe microscopy SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Review ID ATOMIC-FORCE MICROSCOPY; FERROELECTRIC THIN-FILMS; DOPED STRONTIUM-TITANATE; TRANSMISSION ELECTRON-MICROSCOPY; MISFIT RELAXATION MECHANISMS; LEAD-ZIRCONATE-TITANATE; TIP-SAMPLE INTERACTION; IN-SITU OBSERVATION; GRAIN-BOUNDARIES; CAPACITANCE MICROSCOPY AB In the last two decades, scanning probe microscopies (SPMs) have become the primary tool for addressing structure and electronic, mechanical, optical, and transport phenomena on the nanometer and atomic scales. Here, we summarize basic principles of SPM as applied for oxide materials characterization and present recent advances in high-resolution imaging and local property measurements. The use of advanced SPM techniques for solutions of material related problems is illustrated on the examples of grain boundary transport in polycrystalline oxides and ferroelectric domain imaging and manipulation. Future prospects for SPM applications in materials science are discussed. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA. RP Kalinin, SV (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. EM sergei2@ornl.gov; bonneli@lrsm.upenn.edu RI Kalinin, Sergei/I-9096-2012 OI Kalinin, Sergei/0000-0001-5354-6152 NR 204 TC 56 Z9 56 U1 1 U2 37 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2005 VL 88 IS 5 BP 1077 EP 1098 DI 10.1111/j.1551-2916.2005.00383.x PG 22 WC Materials Science, Ceramics SC Materials Science GA 925PZ UT WOS:000229066400001 ER PT J AU Krishnamurthy, R Sheldon, BW Haynes, JA AF Krishnamurthy, R Sheldon, BW Haynes, JA TI Stability of mullite protective coatings for silicon-based ceramics SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID TRACER DIFFUSION; CVD MULLITE; WATER-VAPOR; OXIDATION; CARBIDE; RECESSION; CRYSTALS; ALUMINA AB Silicon-based ceramics are prone to severe oxidation and volatilization problems in the presence of water vapor. To address these issues, mullite has been investigated in recent years as a possible protective coating material. To analyze the stability of such coatings, a multi-species diffusion model for ionic species is developed. Onsager reciprocity is assumed for the mobility coefficients and the resulting moving boundary problem is solved numerically. The formulation also accounts for substantial Si volatilization away from the outer surface of the coating. This model is used to analyze an initial transient leading to the formation of an internal silica layer, a second transient period that follows this silica formation, and a steady-state regime that can only be attained if Si diffusion is sufficiently fast. C1 Brown Univ, Div Engn, Providence, RI 02912 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Sheldon, BW (reprint author), Brown Univ, Div Engn, Providence, RI 02912 USA. EM brian_sheldon@brown.edu NR 29 TC 14 Z9 14 U1 0 U2 2 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2005 VL 88 IS 5 BP 1099 EP 1107 DI 10.1111/j.1551-2916.2005.00169.x PG 9 WC Materials Science, Ceramics SC Materials Science GA 925PZ UT WOS:000229066400002 ER PT J AU Becher, PF Painter, GS Lance, MJ Ii, S Ikuhara, Y AF Becher, PF Painter, GS Lance, MJ Ii, S Ikuhara, Y TI Direct observations of debonding of reinforcing grains in silicon nitride ceramics sintered with yttria plus alumina additives SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID MECHANICAL-PROPERTIES; OXYNITRIDE GLASSES; WHISKERS; CRACK; LAYER AB As in fiber-reinforced composites, debonding, which allows the elongated reinforcing grains to at least partially separate from the rest of the matrix, is a critical part of the toughening mechanism in self-reinforced silicon nitrides. lit situ high-resolution electron microscopy observations reveal that the debonding path c an occur at the interface between the grains and continuous nanometer-thick intergranular film (IGF) or within the IGF depending on the film's composition, which varies with the yttria to alumina ratio in the fixed total amount of sintering additives. Theoretical calculations reveal that the bonding across the interface can be weakened by decreasing the Al and O content (z) of the epitaxial Si6-ZAlZOZN8-Z layer on the grains, which is consistent with the observations of interfacial debonding. However, evidence also indicates that weakening of the amorphous network of the IGF occurs with increase in yttrium levels that can be responsible for the observed mixture of debonding by crack propagation along the interface and within the IGF when the sintering additive contains the highest yttria:alumina ratio. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN USA. Univ Tokyo, Sch Engn, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan. RP Becher, PF (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN USA. EM becherpf@ornl.gov RI Ikuhara, Yuichi/F-3066-2010; Ikuhara, Yuichi/N-1001-2015; Lance, Michael/I-8417-2016 OI Ikuhara, Yuichi/0000-0003-3886-005X; Lance, Michael/0000-0001-5167-5452 NR 16 TC 20 Z9 21 U1 0 U2 6 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2005 VL 88 IS 5 BP 1222 EP 1226 DI 10.1111/j.1551-2916.2005.00237.x PG 5 WC Materials Science, Ceramics SC Materials Science GA 925PZ UT WOS:000229066400023 ER PT J AU Li, YP Maxey, ER Richardson, JW AF Li, YP Maxey, ER Richardson, JW TI Structural behavior of oxygen permeable SrFe0.2Co0.8Ox ceramic membranes with and without pO(2) gradients SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID PEROVSKITE-TYPE OXIDES; ELECTRICAL-CONDUCTIVITY; PERMEATION PROPERTIES; PARTIAL OXIDATION; PHASE-STABILITY; DIFFUSION; SYSTEM; SRCO0.8FE0.2O3-DELTA; STOICHIOMETRY; DIFFRACTION AB The oxygen partial pressure (pO(2))-dependent structural behaviors of two dense tubular ceramic membranes in composition SrFe0.2Co0.8Ox with cubic perovskite structure have been investigated by high-temperature neutron powder diffraction: one in "static" mode and one in simulated-operation mode in which one side of the membrane was exposed to air and the other side to reducing gases with variable pO(2) levels. Rietveld analysis on data collected for the membrane without pO(2) gradients showed that the perovskite is stable in pO(2) down to &SIM; 10(-12) atm, and at &SIM; 10(-14) atm it starts to decompose into a three-phase mixture containing layered intergrowth Ruddlesden-Popper phases Srn+1(Fe,Co)(n)O-x with n = 2 and 3, along with CoO with rocksalt structure. Similar phase evolution was observed when insufficient air flowed on the air side of the membrane exposed to a pO(2) gradient. The data support a nonlinear model of oxygen content in perovskite across the membrane thickness, corresponding to a pO(2) profile that is shallow inside and steep near the reducing side surface. Gas compositions measured with mass spectrometry indicated that oxygen is permeated from the air side to the reducing side of the membrane. The oxygen permeation fluxes at 900&DEG; C were estimated to be 0.4-0.9 sccm/cm(2) for the &SIM; 1 mm thick membrane containing perovskite, depending upon pO(2) gradient. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Richardson, JW (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jwrichardson@anl.gov NR 35 TC 24 Z9 24 U1 1 U2 10 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2005 VL 88 IS 5 BP 1244 EP 1252 DI 10.1111/j.1551-2916.2005.00171.x PG 9 WC Materials Science, Ceramics SC Materials Science GA 925PZ UT WOS:000229066400027 ER PT J AU van Westrenen, W Frank, MR Fei, YW Fei, YW Hanchar, JM Finch, RJ Zha, CS AF van Westrenen, W Frank, MR Fei, YW Fei, YW Hanchar, JM Finch, RJ Zha, CS TI Compressibility and phase transition kinetics of lanthanide-doped zircon SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID RARE-EARTH ELEMENTS; HIGH-PRESSURE; SINGLE-CRYSTAL; SCHEELITE TRANSITION; BRILLOUIN-SCATTERING; ELASTIC-CONSTANTS; SYNTHETIC ZIRCON; X-RAY; ZRSIO4; TRANSFORMATIONS AB The structure and compressibility of synthetic lanthanide-doped zircon (ZrSiO4 with a total of 2.0 mol% trivalent Gd, Dy, Er, Yb, and Y, charge-balanced by addition of P5+) were determined from static compression experiments to 25.9 GPa. The sample bulk modulus, K-T0 = 189 +/- 1 GPa is 5% lower than K-T0 for undoped zircon, and the sample transforms from the zircon to the scheelite structure above 22.6 GPa, 3 GPa greater than the transformation pressure in pure ZrSiO4. A simple model is presented linking compressibility with unit-cell volume for zircon-structured and scheelite-structured ABO(4) compounds, allowing prediction of the compressibility of zircon-structured vanadates and phosphates. C1 Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA. ETH, Inst Mineral & Petrog, CH-8092 Zurich, Switzerland. No Illinois Univ, Dept Geol & Environm Geosci, De Kalb, IL 60115 USA. George Washington Univ, Dept Earth & Environm Sci, Washington, DC USA. Argonne Natl Lab, Argonne, IL 60439 USA. Cornell Univ, Ithaca, NY 14853 USA. RP van Westrenen, W (reprint author), ETH, Inst Mineral & Petrog, CH-8092 Zurich, Switzerland. EM wim.van.westrenen@falw.vu.nl RI Fei, Yingwei/F-3709-2011; van Westrenen, Wim/D-6495-2012; Finch, Robert/D-9553-2013; Frank, Mark/E-6331-2015 OI Fei, Yingwei/0000-0001-9955-5353; Finch, Robert/0000-0001-9342-5574; NR 32 TC 8 Z9 8 U1 1 U2 11 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 2005 VL 88 IS 5 BP 1345 EP 1348 DI 10.1111/j.1551-2916.2005-00291.x PG 4 WC Materials Science, Ceramics SC Materials Science GA 925PZ UT WOS:000229066400047 ER PT J AU Abraham, FF AF Abraham, FF TI Unstable crack motion is predictable SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS LA English DT Article DE dynamic fracture; instability; materials failure; hyperelasticity; atomistic simulation; molecular dynamics; scaling; Yoffe ID DYNAMIC FRACTURE AB Yoffe's linear theory of dynamic brittle fracture suggests that crack motion will be unstable beyond similar to 70% of the Rayleigh speed, a prediction that is not supported by experiment. We show by atomistic simulations that hyperelasticity, the elasticity of large strains, plays a governing role in the instability dynamics of brittle fracture. A simple, yet remarkable, scaling model based on an effective elastic modulus (the secant modulus at the stability limit) gives successful predictions for the onset speed of the crack instability. Published by Elsevier Ltd. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Georgia, Athens, GA 30602 USA. RP Abraham, FF (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94550 USA. EM farid@almaden.ibm.com NR 9 TC 20 Z9 22 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-5096 J9 J MECH PHYS SOLIDS JI J. Mech. Phys. Solids PD MAY PY 2005 VL 53 IS 5 BP 1071 EP 1078 DI 10.1016/j.jmps.2004.12.005 PG 8 WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA 920HM UT WOS:000228680000005 ER PT J AU Matsuda, M Kakurai, K Yethiraj, M Oka, K AF Matsuda, M Kakurai, K Yethiraj, M Oka, K TI High energy magnetic excitations from the edge-sharing CuO2 chains in Ca2Y2Cu5O10 SO JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN LA English DT Article DE neutron-scattering; magnetic excitations; spin-wave; quasi-one-dimensional magnet ID ANISOTROPIC SUPEREXCHANGE; LI2CUO2 AB Ca2Y2Cu5O10 is a quasi-one-dimensional magnet, which consists of the ferromagnetic edge-sharing CuO2 chains. It was previously reported from neutron inelastic scattering experiments in Ca2Y2Cu5O10 up to similar to 14 meV that in the magnetically ordered state there is an anomalous broadening of spin-wave excitations along the chain, which is caused mainly by the antiferromagnetic interchain interactions [M. Matsuda et al.: Phys. Rev. B 63 (2001) 180403(R)I. In this study we extended an energy range of the measurement up to similar to 25 meV. The experimental result suggests that there exist two excitation modes, which is consistent with a theoretical result qualitatively. One mode corresponds to the relatively sharp spin-wave excitations, which broaden with increasing q(chain) and disappear around q(chain) similar to 0.2 r.l.u. and w similar to 10 meV. Another one corresponds to the very broad excitations apparent at q(chain) similar to 0.2-0.3 r.l.u. and w similar to 12-25 meV. C1 Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. RP Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. EM matsuda@neutrons.tokai.jaeri.go.jp RI Matsuda, Masaaki/A-6902-2016 OI Matsuda, Masaaki/0000-0003-2209-9526 NR 14 TC 2 Z9 2 U1 1 U2 4 PU PHYSICAL SOC JAPAN PI TOKYO PA YUSHIMA URBAN BUILDING 5F, 2-31-22 YUSHIMA, BUNKYO-KU, TOKYO, 113-0034, JAPAN SN 0031-9015 J9 J PHYS SOC JPN JI J. Phys. Soc. Jpn. PD MAY PY 2005 VL 74 IS 5 BP 1578 EP 1581 DI 10.1143/JPSJ.74.1578 PG 4 WC Physics, Multidisciplinary SC Physics GA 928TK UT WOS:000229294400043 ER PT J AU Statom, TK Ruebush, M Shiffler, DA Schamiloglu, E LaCour, M Golby, K AF Statom, TK Ruebush, M Shiffler, DA Schamiloglu, E LaCour, M Golby, K TI Adsorbate effects on pulsed electron diode anode thermal response SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article ID PERFORMANCE; CATHODE AB Anode thermal response is important in determining the operation of repetitively pulsed electron diodes and the systems using them. Thermal response determines desorption, cooling requirements, and power deposition. This article describes experimental results from an electron beam diode fitted with both solid aluminum and two types of carbon-carbon fiber anodes. The temperature response is modeled and is used in conjunction with experimental data to study the effect of adsorbates on the anode. Power to the anode is determined through the material properties and modeled temperature response. Thermal properties of the anode are considered with respect to electron stimulated desorption of adsorbates on the anode, as an ion source, leading to plasma development and diode impedance collapse. © 2005 American Vacuum Society. C1 AF Res Lab, Directed Energy Directorate, Kirtland AFB, Kirtland AFB, NM 87117 USA. Sandia Natl Labs, Kirtland AFB, Kirtland AFB, NM 87117 USA. Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA. SAIC, Albuquerque, NM 87106 USA. RP Statom, TK (reprint author), AF Res Lab, Directed Energy Directorate, Kirtland AFB, Kirtland AFB, NM 87117 USA. NR 12 TC 0 Z9 0 U1 0 U2 3 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 PD MAY-JUN PY 2005 VL 23 IS 3 BP 470 EP 474 DI 10.1116/1.1887197 PG 5 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 926LF UT WOS:000229124000015 ER PT J AU Baer, DR AF Baer, DR TI Summary: Update to ASTM guide E 1523 to charge control and charge referencing techniques in x-ray photoelectron spectroscopy SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article AB An updated version of the American Society for Testing and Materials (ASTM) guide E 1523 to the methods to charge control and charge referencing techniques in x-ray photoelectron spectroscopy has been released by ASTM [Annual Book of ASTM Standards Surface Analysis (American Society for Testing and Materials, West Conshohocken, PA, 2004), Vol. 03.06]. The guide is meant to acquaint x-ray photoelectron spectroscopy (XPS) users with the various charge control and charge referencing techniques that are and have been used in the acquisition and interpretation of XPS data from surfaces of insulating specimens. The current guide has been expanded to include new references as well as recommendations for reporting information on charge control and charge referencing. The previous version of the document had been published in 1997. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Baer, DR (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM don.baer@pnl.gov RI Baer, Donald/J-6191-2013 OI Baer, Donald/0000-0003-0875-5961 NR 4 TC 1 Z9 1 U1 0 U2 0 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 PD MAY-JUN PY 2005 VL 23 IS 3 BP 577 EP 578 DI 10.1116/1.1901672 PG 2 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 926LF UT WOS:000229124000034 ER PT J AU Young, RW Draper, BL AF Young, RW Draper, BL TI Integrated field effect transistors for microelectromechanical systems applications, modeling, and results SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article ID SIO2-FILMS; DIFFUSION; SILICON AB We have demonstrated a simple technique for building n-channel metal-oxide-semiconductor-field effect transistors (MOSFETs) and complex microelectromechanical systems (MEMS) simultaneously, instead of serially, allowing a more straightforward integration of complete systems. The fabrication sequence uses few additional process steps and only one additional masking layer compared to a MEMS-only technology, but uses processes outside the bounds of conventional complementary metal-oxide-semiconductor very large-scale integrated devices. The process flow forms the MOSFET gate electrode using the first level of mechanical polycrystalline silicon (polysilicon), while the MOSFET source and drain regions are formed by dopant diffusions into the substrate from subsequent levels of heavily doped polysilicon that are used for mechanical elements. We have observed that phosphorus-doped gate polysilicon shows negligible dopant diffusion through the gate oxide during high-temperature MEMS processing anneals, whereas arsenic-doped gate polysilicon shows significant diffusion through the oxide. We have. adapted a commercial process and device simulator to model a wide range of device designs and process flows. (c) 2005 American Vacuum Society. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Young, RW (reprint author), Sandia Natl Labs, POB 5800,MS 1084, Albuquerque, NM 87185 USA. EM rwyoung@sandia.gov; draperbl@sandia.gov NR 10 TC 3 Z9 3 U1 1 U2 3 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAY-JUN PY 2005 VL 23 IS 3 BP 1032 EP 1035 DI 10.1116/1.1897707 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA 945CO UT WOS:000230479600025 ER PT J AU Bae, JW Hossain, T Adesida, I Bogart, KH Koleske, D Allerman, AA Jang, JH AF Bae, JW Hossain, T Adesida, I Bogart, KH Koleske, D Allerman, AA Jang, JH TI Low resistance ohmic contact to p-type GaN using Pd/lr/Au multilayer scheme SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article ID ELECTRICAL-PROPERTIES AB Ohmic contacts on p-type GaN utilizing Pd/Ir/Au metallization were fabricated and characterized. Metallized samples that were rapid thermally annealed at 400 degrees C for 1 min exhibited linear current-voltage characteristics. Specific ohmic contact resistivities as low as 2 X 10(-5) Omega cm(2) were achieved. Auger electron spectroscopy and x-ray photoelectron spectroscopy depth profiles of annealed Pd/lr/Au contact revealed the formation. of Pd- and Ir-related alloys at the metalsemiconductor junction with the creation of Ga vacancies below the contact. The excellent contact resistance obtained is attributed to the formation of these Ga vacancies which resulted in the reduction of the depletion region width at the junction. (c) 2005 American Vacuum Society. C1 Univ Illinois, Micro & Nanotechnol Lab, Urbana, IL 61801 USA. Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Gwangju Inst Sci & Technol, Dept Informat & Commun, Kwangju, South Korea. RP Adesida, I (reprint author), Univ Illinois, Micro & Nanotechnol Lab, Urbana, IL 61801 USA. EM iadesida@uiuc.edu NR 16 TC 7 Z9 7 U1 1 U2 2 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAY-JUN PY 2005 VL 23 IS 3 BP 1072 EP 1075 DI 10.1116/1.1924416 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA 945CO UT WOS:000230479600034 ER PT J AU Bertness, KA Roshko, A Asher, SE Perkins, CL AF Bertness, KA Roshko, A Asher, SE Perkins, CL TI Storage conditions for high-accuracy composition standards of AlGaAs SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 22nd Meeting of the North American Conference on Molecular Beam Epitaxy (NAMBE 2004) CY OCT 10-13, 2004 CL Banff, CANADA ID OXIDATION AB A1GaAs epitaxial films were stored under different environmental conditions and the resulting surface oxidation and contamination variations measured with several analytical techniques. Auger depth profiles confirmed that contamination had been confined to within approximately 10 nm of the surface for all specimens stored in controlled environments for over three years. We also performed an atomic force microscopy study on a multilayer structure, measuring the height of the oxides formed in air. Surface contamination was examined in more detail with time-of-flight secondary ion mass spectrometry and x-ray photoelectron spectroscopy. Surface oxides changed over time, and could be altered by sputtering. Sputtering was particularly effective in removing hydrocarbons. Based on these results, A1GaAs reference films for x < 0.4 should remain stable for at least five years if stored in either nitrogen or vacuum environments, with allowance for periodic handling in air. C1 Natl Inst Stand & Technol, Boulder, CO 80303 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Bertness, KA (reprint author), Natl Inst Stand & Technol, Boulder, CO 80303 USA. EM bertness@boulder.nist.gov NR 6 TC 1 Z9 1 U1 0 U2 0 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAY-JUN PY 2005 VL 23 IS 3 BP 1267 EP 1271 DI 10.1116/1.1900731 PG 5 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA 945CO UT WOS:000230479600075 ER PT J AU Chohan, B Lang, D Sagar, M Korber, B Lavreys, L Richardson, B Overbaugh, J AF Chohan, B Lang, D Sagar, M Korber, B Lavreys, L Richardson, B Overbaugh, J TI Selection for human immunodeficiency virus type I envelope glycosylation variants with shorter V1-V2 loop sequences occurs during transmission of certain genetic subtypes and may impact viral RNA levels SO JOURNAL OF VIROLOGY LA English DT Article ID LINKED GLYCOSYLATION; HIV-1 DIVERSITY; INFECTION; AIDS; NEUTRALIZATION; PLASMA; WOMEN; TIME; GLYCOPROTEIN; RECOGNITION AB Designing an effective human immunodeficiency virus type 1 (HIV-1) vaccine will rely on understanding which variants, from among the myriad of circulating HIV-1 strains, are most commonly transmitted and determining whether such variants have an Achilles heel. Here we show that heterosexually acquired subtype A HIV-1 envelopes have signature sequences that include shorter V1-V2 loop sequences and fewer predicted N-linked glycosylation sites relative to the overall population of circulating variants. In contrast, recently transmitted subtype B variants did not, and this was true for cases where the major risk factor was homosexual contact, as well as for cases where it was heterosexual contact. This suggests that selection during HIV-1 transmission may vary depending on the infecting subtype. There was evidence from 23 subtype A-infected women for whom there was longitudinal data that those who were infected with viruses with fewer potential N-linked glycosylation sites in V1-V2 had lower viral set point levels. Thus, our study also suggests that the extent of glycosylation in the infecting virus could impact disease progression. C1 Fred Hutchinson Canc Res Ctr, Div Human Biol, Seattle, WA 98109 USA. Fred Hutchinson Canc Res Ctr, Div Publ Hlth Sci, Seattle, WA 98109 USA. Univ Washington, Dept Pathobiol, Seattle, WA 98195 USA. Univ Washington, Dept Med, Seattle, WA 98195 USA. Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA. Univ Washington, Dept Biostat, Seattle, WA 98195 USA. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Overbaugh, J (reprint author), Fred Hutchinson Canc Res Ctr, Div Human Biol, 1100 Fairview Ave N,C3-168, Seattle, WA 98109 USA. EM joverbau@fhcrc.org FU NIAID NIH HHS [AI38518, R37 AI038518] NR 17 TC 171 Z9 175 U1 1 U2 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0022-538X J9 J VIROL JI J. Virol. PD MAY PY 2005 VL 79 IS 10 BP 6528 EP 6531 DI 10.1128/JVI.79.10.6528-6531.2005 PG 4 WC Virology SC Virology GA 922CV UT WOS:000228814400064 PM 15858037 ER PT J AU Berry, JW Fleischer, L Hart, WE Phillips, CA Watson, JP AF Berry, JW Fleischer, L Hart, WE Phillips, CA Watson, JP TI Sensor placement in municipal water networks SO JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT-ASCE LA English DT Article; Proceedings Paper CT 6th Annual Symposium on Water Distribution Systems Analysis held at the ASCE EWRI World Water and Environmental Resources Congress CY JUN 27-JUL 01, 2004 CL Salt Lake City, UT SP ASCE EWRI ID DETECTING ACCIDENTAL CONTAMINATIONS; STATIONS; SYSTEM AB We present a model for optimizing the placement of sensors in municipal water networks to detect maliciously injected contaminants. An optimal sensor configuration minimizes the expected fraction of the population at risk. We formulate this problem as a mixed-integer program, which can be solved with generally available solvers. We find optimal sensor placements for three test networks with synthetic risk and population data. Our experiments illustrate that this formulation can be solved relatively quickly and that the predicted sensor configuration is relatively insensitive to uncertainties in the data used for prediction. C1 Sandia Natl Labs, Discrete Algorithms & Math Dept, Albuquerque, NM 87185 USA. IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. RP Berry, JW (reprint author), Sandia Natl Labs, Discrete Algorithms & Math Dept, POB 5800, Albuquerque, NM 87185 USA. EM jberry@sandia.gov; lkf@watson.ibm.com; wehart@sandia.gov; caphill@sandia.gov; jwatson@sandia.gov NR 16 TC 83 Z9 88 U1 2 U2 13 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 0733-9496 J9 J WATER RES PL-ASCE JI J. Water Resour. Plan. Manage.-ASCE PD MAY-JUN PY 2005 VL 131 IS 3 BP 237 EP 243 DI 10.1061/(ASCE)0733-9496(2005)131:3(237) PG 7 WC Engineering, Civil; Water Resources SC Engineering; Water Resources GA 919OV UT WOS:000228628300011 ER PT J AU Hargrove, WW Hoffman, FM Efroymson, RA AF Hargrove, WW Hoffman, FM Efroymson, RA TI A practical map-analysis tool for detecting potential dispersal corridors SO LANDSCAPE ECOLOGY LA English DT Article DE connectivity; fragmentation; matrix; metapopulation; movement; network; patch; preserve design; sink; source; travel path ID PATCH COLONIZATION; LANDSCAPES AB We describe the Pathway Analysis Through Habitat (PATH) tool, which can predict the location of potential corridors of animal movement between patches of habitat within any map. The algorithm works by launching virtual entities that we call 'walkers' from each patch of habitat in the map, simulating their travel as they Journey through land cover types in the intervening matrix, and finally arrive at a different habitat 'island.' Each walker is imbued with a Set Of User-specified habitat preferences that make its walking behavior resemble a particular animal species. Because the tool operates in parallel on a supercomputer, large numbers of walkers can be efficiently simulated. The importance of each habitat patch as a source or a sink for a species is calculated, consistent with existing concepts in the metapopulation literature. The manipulation of a series of contrived artificial landscapes demonstrates that the location of potential dispersal corridors and relative Source and sink importance among patches can be purposefully altered in expected ways. Finally, potential dispersal corridors are predicted among remnant woodlots within three actual landscape maps. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Hargrove, WW (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. EM hnw@fire.esd.ornl.gov RI Hoffman, Forrest/B-8667-2012; OI Hoffman, Forrest/0000-0001-5802-4134; Efroymson, Rebecca/0000-0002-3190-880X NR 33 TC 28 Z9 33 U1 2 U2 10 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0921-2973 EI 1572-9761 J9 LANDSCAPE ECOL JI Landsc. Ecol. PD MAY PY 2005 VL 20 IS 4 BP 361 EP 373 DI 10.1007/s10980-004-3162-y PG 13 WC Ecology; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA 980RE UT WOS:000233035100001 ER PT J AU Wilks, S Baker, K Brase, J Carrano, C Morris, J Ruggerio, A Stappaerts, E AF Wilks, S Baker, K Brase, J Carrano, C Morris, J Ruggerio, A Stappaerts, E TI Adaptive-optics models address free-space communications SO LASER FOCUS WORLD LA English DT Article ID SYSTEMS AB Extending propagation distances from short range to tens of kilometers requires compensation for atmospheric turbulence. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Wilks, S (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM wilksl@llnl.gov NR 6 TC 1 Z9 1 U1 1 U2 1 PU PENNWELL PUBL CO PI NASHUA PA 98 SPIT BROOK RD, NASHUA, NH 03062-2801 USA SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD MAY PY 2005 VL 41 IS 5 BP 93 EP + PG 3 WC Optics SC Optics GA 925IL UT WOS:000229046700029 ER PT J AU He, XM Hakovirta, M Nastasi, M AF He, XM Hakovirta, M Nastasi, M TI Hardness, hydrophobic and optical properties of fluorine and boron co-alloyed diamond-like carbon films SO MATERIALS LETTERS LA English DT Article DE diamond-like carbon films; plasma immersion ion processing; hydrophobicity ID THIN-FILMS; IMPLANTATION AB Fluorine (F) and boron (B) co-alloyed diamond-like carbon (FB-DLC) films were prepared on polymethyl methacrylate (PMMA), polycarbonate, glass, and silicon (100) wafer using a B2H6+C2H2+C2F6 plasma immersion ion processing (PIIP) technique. The chemical composition and atomic bonding of FB-DLC films were analyzed to investigate their influence on the hardness, optical band gap and contact angles of water. Compared to B-alloyed or F-alloyed DLC films, BF-alloyed DLC films exhibited enhanced hardness, high optical gap energy, and improved hydrophobic properties. (c) 2004 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP He, XM (reprint author), Avery Res Ctr, 2900 Bradley St, Pasadena, CA 91107 USA. EM xiaoming.he@averydennison.com NR 13 TC 7 Z9 8 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-577X J9 MATER LETT JI Mater. Lett. PD MAY PY 2005 VL 59 IS 11 BP 1417 EP 1421 DI 10.1016/j.matlet.2004.11.059 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 909NN UT WOS:000227866700022 ER PT J AU Qazi, JI Marquardt, B Allard, LF Rack, HJ AF Qazi, JI Marquardt, B Allard, LF Rack, HJ TI Phase transformations in Ti-35Nb-7Zr-5Ta-(0.06-0.68)O alloys SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS LA English DT Article; Proceedings Paper CT Materials and Science Technology Meeting 2004 CY SEP 26-29, 2004 CL New Orleans, LA SP The Mat Soc DE biomaterials; aging; omega phase; phase transformations; oxygen; metastable beta-titanium alloys ID TI-NB ALLOYS; OMEGA-PHASE; MECHANICAL-PROPERTIES; BIOMEDICAL APPLICATIONS; TITANIUM ALLOYS; YOUNGS MODULUS; TI-29NB-13TA-4.6ZR; BETA; COMPETITION; MARTENSITE AB The phase transformations occurring in Ti-35Nb-7Zr-5Ta-(0.06-0.68)O beta solution treated and aged between 427 and 593 degrees C for 8 h have been investigated. Aging at 427 degrees C resulted, respectively, in omega, omega+alpha and alpha phase formation for 0.06, 0.46 and 0.68 wt.% O. A modification in omega phase morphology, from near circular to ellipsoidal, was also observed with increasing O from 0.06 to 0.46 wt.%. Aging at higher temperatures resulted in resolution of the to phase in 0.06 wt.% O. Lenticular alpha precipitation was observed at higher O content, the volume fraction of alpha increasing with increasing O at a constant aging temperature and with increasing aging temperature at a constant O content. The latter also resulted in coarsening of the alpha precipitates and an increase in their aspect ratio. Finally aging of these alloys resulted in the formation of precipitate free zones (PFZs) along prior O grain boundaries, the width of these zones increasing with an increasing aging temperature. These observations are consistent with the ability of O to suppress omega phase formation through interruption of the (111) lattice displacement required for this phase's formation, while promoting alpha phase formation at higher O content, presumably through local ordering within the beta phase. (c) 2005 Elsevier B.V. All rights reserved. C1 Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA. Zimmer Inc, Warsaw, IN 46581 USA. Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA. Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA. RP Qazi, JI (reprint author), Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA. EM jqazi@clemson.edu NR 21 TC 58 Z9 65 U1 1 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0928-4931 J9 MAT SCI ENG C-BIO S JI Mater. Sci. Eng. C-Biomimetic Supramol. Syst. PD MAY PY 2005 VL 25 IS 3 BP 389 EP 397 DI 10.1016/j.msec.2005.01.022 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA 948SC UT WOS:000230735000021 ER PT J AU Duric, N Littrup, P Babkin, A Chambers, D Azevedo, S Kalinin, A Pevzner, R Tokarev, M Holsapple, E Rama, O Duncan, R AF Duric, N Littrup, P Babkin, A Chambers, D Azevedo, S Kalinin, A Pevzner, R Tokarev, M Holsapple, E Rama, O Duncan, R TI Development of ultrasound tomography for breast imaging: Technical assessment SO MEDICAL PHYSICS LA English DT Article DE breast cancer; ultrasound tomography; diagnostic imaging; tissue characterization ID DIFFRACTION TOMOGRAPHY; PROPAGATION; BACKPROPAGATION; MAMMOGRAPHY; SONOGRAPHY; SPECIMENS; ARRAYS; TISSUE AB Ultrasound imaging is widely used in medicine because of its benign characteristics and real-time capabilities. Physics theory suggests that the application of tomographic techniques may allow ultrasound imaging to reach its full potential as a diagnostic tool allowing it to compete with other tomographic modalities such as x-ray computer tomography, and MRI. This paper describes the construction and use of a prototype tomographic scanner and reports on the feasibility of implementing tomographic theory in practice and the potential of ultrasound (US) tomography in diagnostic imaging. Data were collected with the prototype by scanning two types of phantoms and a cadaveric breast. A specialized suite of algorithms was developed and utilized to construct images of reflectivity and sound speed from the phantom data. The basic results can be summarized as follows. (i) A fast, clinically relevant US tomography scanner can be built using existing technology. (ii) The spatial resolution, deduced from images of reflectivity, is 0.4 mm. The demonstrated 10 cm depth-of-field is superior to that of conventional ultrasound and the image contrast is improved through the reduction of speckle noise and overall lowering of the noise floor. (iii) Images of acoustic properties such as sound speed suggest that it is possible to measure variations in the sound speed of 5 m/s. An apparent correlation with x-ray attenuation suggests that the sound speed can be used to discriminate between various types of soft tissue. (iv) Ultrasound tomography has the potential to improve diagnostic imaging in relation to breast cancer detection. (c) 2005 American Association of Physicists in Medicine. C1 Karmanos Canc Inst, Detroit, MI 48201 USA. Groupveloc LLC, Albuquerque, NM 87131 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Moscow MV Lomonosov State Univ, Moscow, Russia. DECO Geophys Ltd, Moscow, Russia. RP Duric, N (reprint author), Karmanos Canc Inst, 110 E Warren,Hudson Weber Bldg,Suite 504, Detroit, MI 48201 USA. EM duric@karmanos.org RI Pevzner, Roman/A-3781-2013; OI Pevzner, Roman/0000-0002-2555-6860 NR 29 TC 79 Z9 82 U1 0 U2 13 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 2005 VL 32 IS 5 BP 1375 EP 1386 DI 10.1118/1.1897463 PG 12 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 928LY UT WOS:000229274300017 PM 15984689 ER PT J AU Williams, PT AF Williams, PT TI Longitudinal changes in cardiorespiratory fitness: Measurement error or true change? SO MEDICINE AND SCIENCE IN SPORTS AND EXERCISE LA English DT Letter ID PHYSICAL-FITNESS; MORTALITY C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Williams, PT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 3 TC 1 Z9 1 U1 1 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0195-9131 J9 MED SCI SPORT EXER JI Med. Sci. Sports Exerc. PD MAY PY 2005 VL 37 IS 5 BP 877 EP 878 DI 10.1249/01.MSS.0000162620.45200.F0 PG 2 WC Sport Sciences SC Sport Sciences GA 924GG UT WOS:000228966400025 PM 15870645 ER PT J AU Rebak, RB AF Rebak, RB TI Symposium "Effect of processing on materials properties for nuclear waste disposition" - Foreword SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Editorial Material C1 Lawrence Livermore Natl Lab, Livermore, CA USA. RP Rebak, RB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 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 2005 VL 36A IS 5 BP 1073 EP 1073 PG 1 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 921WY UT WOS:000228797500001 ER PT J AU Haslam, JJ Farmer, JC Hopper, RW Wilfinger, KR AF Haslam, JJ Farmer, JC Hopper, RW Wilfinger, KR TI Ceramic coatings for a corrosion-resistant nuclear waste container evaluated in simulated ground water at 90 degrees C SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Effect of Processing on Materials Properties for Nuclear Waste Disposition held at the TMS Fall Meeting CY NOV 10-11, 2003 CL Chicago, IL SP TMS AB Ceramic materials provide an innovative opportunity for corrosion-resistant coatings for nuclear waste containers. Their suitability can be derived from the fully oxidized state for selected metal oxides. Ceramic coatings applied to plain carbon steel substrates by several thermal spray techniques have been exposed to 90 degrees C simulated ground water (at 10 times typical concentration) for nearly 6 years. Thermal spray processes examined in this work included plasma spray, high-velocity oxy fuel (HVOF), and detonation gun. Some thermal spray coatings have demonstrated superior corrosion protection for the plain carbon steel substrate. In particular, the HVOF and detonation gun thermal spray processes produced coatings with low connected porosity, which limited the growth rate of corrosion products. It was also demonstrated that these coatings resisted spallation of the coating even when an intentional flaw (which allowed for corrosion of the carbon steel substrate underneath the ceramic coating) was placed in the coating. An approach for a theoretical basis for prediction of the corrosion protection provided by ceramic coatings is also presented. The theoretical development includes the effect of the morphology and amount of the porosity within the thermal spray coating and provides a prediction of the exposure time needed to produce a crack in the ceramic coating. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Haslam, JJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM haslam2@llnl.gov NR 16 TC 6 Z9 6 U1 3 U2 3 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 2005 VL 36A IS 5 BP 1085 EP 1095 DI 10.1007/s11661-005-0202-4 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 921WY UT WOS:000228797500003 ER PT J AU Yilmaz, A Chandra, D Rebak, RB AF Yilmaz, A Chandra, D Rebak, RB TI Corrosion behavior of carbon steel rock bolt in simulated Yucca Mountain ground waters SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Effect of Processing on Materials Properties for Nuclear Waste Disposition held at the TMS Fall Meeting CY NOV 10-11, 2003 CL Chicago, IL SP TMS AB Medium carbon steel (AISI 1040) was one of the candidate materials for rock bolts to reinforce the bore-hole liners and emplacement drifts of the high-level nuclear waste repository in Yucca Mountain. The corrosion performance of this structural steel was investigated by techniques such as linear polarization, electrochemical impedance spectroscopy (EIS), and laboratory immersion tests in simulated ground waters. The corrosion rates of the steel were measured for the temperatures in the range from 25 degrees C to 85 degrees C, for the ionic concentrations of 1 time (1X), 10 times (10X), and a hundred times (100X) ground water concentration. The steel corroded uniformly at penetration rates of 35 to 200 mu m/year in the deaerated waters, and at 200 to 1000 mu m/year in the aerated waters. Increasing temperatures in the deaerated waters increased the corrosion rate of the steel. However, increasing ionic concentrations influenced the corrosion rate only slightly. In the aerated 1X and 10X waters, increasing temperatures increased the rates of the steel significantly. In the aerated 100X waters, the corrosion rate increased from 25 degrees C to 45 degrees C and decreased at higher temperatures (65 degrees C and up) due to the formation of oxide/hydroxide films and salt scales on the surface of the steel specimen. The steel suffered pitting corrosion in the both deaerated and aerated hot ground water environments after anodic polarization. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Nevada, Dept Met Engn & Mat Sci, Reno, NV 89557 USA. RP Yilmaz, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM yilmaz2@llnl.gov OI Yilmaz, Ahmet/0000-0001-6708-0672; Rebak, Raul/0000-0002-8070-4475 NR 18 TC 6 Z9 6 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 2005 VL 36A IS 5 BP 1097 EP 1105 DI 10.1007/s11661-005-0203-3 PG 9 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 921WY UT WOS:000228797500004 ER PT J AU Gorhe, DD Raja, KS Namjoshi, SA Radmilovic, V Tolly, A Jones, DA AF Gorhe, DD Raja, KS Namjoshi, SA Radmilovic, V Tolly, A Jones, DA TI Electrochemical methods to detect susceptibility of Ni-Cr-Mo-W Alloy 22 to intergranular corrosion SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Effect of Processing on Materials Properties for Nuclear Waste Disposition held at the TMS Fall Meeting CY NOV 10-11, 2003 CL Chicago, IL SP TMS ID GRAIN-BOUNDARY CHEMISTRY; STAINLESS-STEELS; WELD METAL; BEHAVIOR; MICROSTRUCTURE; SOLIDIFICATION; PRECIPITATION; SENSITIZATION; STABILITY; PHASE AB Alloy 22 (UNS N06022), a Ni-Cr-Mo-W based alloy, is a candidate material for the outer wall of nuclear waste package (NWP) containers. Even though the alloy is highly stable at low temperatures, it could undergo microstructural changes during processing such as welding and stress relieving. Formation of topologically close-packed (TCP) phases such as mu, P, sigma, etc. and Cr-rich carbides could make the material susceptible to localized corrosion. Hence, it is important to correlate the microstructural changes with the corrosion resistance of the alloy by nondestructive and rapid electrochemical tests. In this investigation, different electrochemical test solutions were used to quantify the microstructural changes associated with aging and welding of the wrought alloy 22. The results of double-loop (DL) electrochemical potentiodynamic reactivation (EPR) tests in 1 M H2SO4 + 0.5 M NaCl + 0.01 M KSCN solution indicated Cr depletion during initial stages of aging of wrought alloy 22. Results of EPR tests in 2 M HCl + 0.01 M KSCN solution at 60 degrees C correlated well with the Mo depletion that occurred near TCP phases formed during aging of both weld and wrought alloy 22 materials. The EPR test results were compared with standard chemical weight loss measurements specified by ASTM standard G-28 methods A and B. C1 Univ Nevada, Dept Met & Mat Engn, Reno, NV 89557 USA. Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. RP Gorhe, DD (reprint author), Univ Nevada, Dept Met & Mat Engn, Reno, NV 89557 USA. EM ksraja@unv.edu NR 28 TC 10 Z9 11 U1 1 U2 6 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 2005 VL 36A IS 5 BP 1153 EP 1167 DI 10.1007/s11661-005-0208-y PG 15 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 921WY UT WOS:000228797500009 ER PT J AU Rodriguez, MA Carranza, RM Rebak, RB AF Rodriguez, MA Carranza, RM Rebak, RB TI Influence of halide ions and alloy microstructure on the passive and localized corrosion behavior of Alloy 22 SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Effect of Processing on Materials Properties for Nuclear Waste Disposition held at the TMS Fall Meeting CY NOV 10-11, 2003 CL Chicago, IL SP TMS ID NICKEL-BASE ALLOYS AB Alloy 22 (N06022) is the current candidate alloy used to fabricate the external wall of the high-level nuclear waste containers for the Yucca Mountain repository. It was of interest to study and compare the general and localized corrosion susceptibility of Alloy 22 in fluoride and chloride solutions at 90 degrees C. Standard electrochemical tests such as cyclic potentiodynamic polarization, amperometry, and electrochemical impedance spectroscopy were used. Studied variables included the solution pH and the alloy microstructure (thermal aging). Results show that Alloy 22 is highly resistant to general corrosion in all the solutions tested. Thermal aging is not detrimental and even seems to be slightly beneficial for general corrosion at the higher solution pHs. Pitting corrosion was never observed. Crevice corrosion was found only for high chloride-containing solutions after anodic polarization. The presence of fluoride ions together with chloride ions seems to increase the susceptibility of Alloy 22 to crevice corrosion compared to pure chloride solutions. C1 Argentine Atom Energy Commiss, RA-1650 San Martin, Buenos Aires, Argentina. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Rodriguez, MA (reprint author), Argentine Atom Energy Commiss, RA-1650 San Martin, Buenos Aires, Argentina. EM carranza@cnea.gov.ar OI Rodriguez, Martin/0000-0001-6852-1310 NR 22 TC 17 Z9 17 U1 0 U2 0 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 2005 VL 36A IS 5 BP 1179 EP 1185 DI 10.1007/s11661-005-0210-4 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 921WY UT WOS:000228797500011 ER PT J AU Lograsso, TA Fuh, BC Trivedi, R AF Lograsso, TA Fuh, BC Trivedi, R TI Phase selection during directional solidification of peritectic alloys SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID MICROSTRUCTURE FORMATION; UNIDIRECTIONAL SOLIDIFICATION; EUTECTIC TRANSITION; DENDRITIC GROWTH; BINARY-ALLOYS; CONVECTION; SYSTEMS; INTERFACE; STABILITY; DYNAMICS AB Directional solidification studies have been conducted using Pb-Bi peritectic alloys over a wide range of compositions, temperature gradients, and growth velocities to characterize the primary alpha- to primary beta-phase transitions, which have been observed at both very low and very high velocities. The critical conditions for these transitions correspond to the simultaneous growth of the alpha and beta phases at or close to a single isotherm. The low velocity transition occurs under very specific conditions of composition, temperature gradient, and growth velocity. Since the transition conditions are composition dependent, they change continuously under terrestrial conditions where rejected solute is convectively mixed into the liquid. Detailed experimental studies have been carried out to examine the phase selection in the immediate vicinity of the critical velocity for the alpha to beta transition, and the effect of convection on this transition is examined experimentally in the Pb-Bi system. The dynamic condition, at which both phases are present at the same isotherm, was shown to depend not only on velocities, temperature gradients, and bulk (nominal) alloy compositions, but also on the volume fractions of solid. A quantitative expression for the alpha- to beta-phase transition condition was obtained by using the boundary layer model of fluid flow, which showed good agreement with the experimental results. It is shown that the transition occurs at the volume fraction where the bulk composition reaches the critical composition value predicted by the diffusive model. The modification in the microstructure map for the trailing planar or nonplanar beta phase is discussed. C1 Ames Lab, Mat & Engn Phys Program, Ames, IA 50014 USA. Iowa State Univ, Ames Lab, US Dept Energy, Ames, IA 50011 USA. RP Lograsso, TA (reprint author), Ames Lab, Mat & Engn Phys Program, Ames, IA 50014 USA. EM lograsso@ameslab.gov NR 37 TC 18 Z9 22 U1 2 U2 7 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 2005 VL 36A IS 5 BP 1287 EP 1300 DI 10.1007/s11661-005-0221-1 PG 14 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 921WY UT WOS:000228797500022 ER PT J AU Strunnikova, M Schagdarsurengin, U Kehlen, A Garbe, JC Stampfer, MR Dammann, R AF Strunnikova, M Schagdarsurengin, U Kehlen, A Garbe, JC Stampfer, MR Dammann, R TI Chromatin inactivation precedes de novo DNA methylation during the progressive epigenetic silencing of the RASSF1A promoter SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID MAMMARY EPITHELIAL-CELLS; HISTONE H3 METHYLTRANSFERASE; BINDING PROTEIN MECP2; CPG ISLAND; BREAST-CANCER; LYSINE 9; DEACETYLASE COMPLEX; NEUROSPORA-CRASSA; GENE; TRANSCRIPTION AB Epigenetic inactivation of the RASSFIA tumor suppressor by CpG island methylation was frequently detected in cancer. However, the mechanisms of this aberrant DNA methylation are unknown. In the RASSFIA promoter, we characterized four Sp1 sites, which are frequently methylated in cancer. We examined the functional relationship between DNA methylation, histone modification, Sp1 binding, and RASSFIA expression in proliferating human mammary epithelial cells. With increasing passages, the transcription of RASSFIA was dramatically silenced. This inactivation was associated with deacetylation and lysine 9 trimethylation of histone H3 and an impaired binding of Sp1 at the RASSFIA promoter. In mammary epithelial cells that had overcome a stress-associated senescence barrier, a spreading of DNA methylation in the CpG island promoter was observed. When the RASSFIA-silenced cells were treated with inhibitors of DNA methyltransferase and histone deacetylase, binding of Sp1 and expression of RASSFIA reoccurred. In summary, we observed that histone H3 deacetylation and H3 lysine 9 trimethylation occur in the same time window as gene inactivation and precede DNA methylation. Our data suggest that in epithelial cells, histone inactivation may trigger de novo DNA methylation of the RASSFIA promoter and this system may serve as a model for CpG island inactivation of tumor suppressor genes. C1 Univ Halle Wittenberg, AG Tumorgenet Med Fak, D-06097 Halle Saale, Germany. Univ Halle Wittenberg, Inst Med Immunol, D-06097 Halle Saale, Germany. Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Dammann, R (reprint author), Univ Halle Wittenberg, Inst Humangenet & Med Biol, Magdeburger Str 2, D-06097 Halle Saale, Germany. EM reinhard.dammann@medizin.uni-halle.de NR 49 TC 86 Z9 95 U1 0 U2 5 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0270-7306 J9 MOL CELL BIOL JI Mol. Cell. Biol. PD MAY PY 2005 VL 25 IS 10 BP 3923 EP 3933 DI 10.1128/MCB.25.10.3923-3933.2005 PG 11 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 923DB UT WOS:000228888100008 PM 15870267 ER PT J AU Solovjeva, L Svetlova, M Sasina, L Tanaka, K Saijo, M Nazarov, I Bradbury, M Tomilin, N AF Solovjeva, L Svetlova, M Sasina, L Tanaka, K Saijo, M Nazarov, I Bradbury, M Tomilin, N TI High mobility of flap endonuclease 1 and DNA polymerase eta associated with replication foci in mammalian S-phase nucleus SO MOLECULAR BIOLOGY OF THE CELL LA English DT Article ID NUCLEOTIDE EXCISION-REPAIR; DEFECTIVE POSTREPLICATION REPAIR; DOUBLE-STRAND BREAKS; LIVING CELLS; HOMOLOGOUS RECOMBINATION; SACCHAROMYCES-CEREVISIAE; ATAXIA-TELANGIECTASIA; ULTRAVIOLET-LIGHT; IN-VIVO; SITES AB Originally detected in fixed cells, DNA replication foci (RFi) were later visualized in living cells by using green fluorescent protein (GFP)-tagged proliferating cell nuclear antigen (PCNA) and DNA ligase I. It was shown using fluorescence redistribution after photobleaching (FRAP) assay that focal GFP-PCNA slowly exchanged, suggesting the existence of a stable replication holocomplex. Here, we used the FRAP assay to study the dynamics of the GFP-tagged PCNA-binding proteins: Flap endonuclease 1 (Fen1) and DNA polymerase eta (Pol eta). We also used the GFP-Cockayne syndrome group A (CSA) protein, which does associate with transcription foci after DNA damage. In normal cells, GFP-Pol eta and GFP-Fen1 are mobile with residence times at RFi (t(m)) similar to 2 and similar to 0.8 s, respectively. GFP-CSA is also mobile but does not concentrate at discrete foci. After methyl methanesulfonate (MMS) damage, the mobile fraction of focal GFP-Fen1 decreased and tm increased, but it then recovered. The mobilities of focal GFP-Pol eta and GFP-PCNA did not change after MMS. The mobility of GFP-CSA did not change after UV-irradiation. These data indicate that the normal replication complex contains at least two mobile subunits. The decrease of the mobile fraction of focal GFP-Fen1 after DNA damage suggests that Fen1 exchange depends on the rate of movement of replication forks. C1 Russian Acad Sci, Inst Cytol, Lab Chromosome Stabil, St Petersburg 194064, Russia. Russian Acad Med Sci, Inst Expt Med, St Petersburg 197376, Russia. Osaka Univ, Grad Sch Frontier Biosci, Suita, Osaka 5650871, Japan. Univ Calif Davis, Sch Med, Dept Biochem & Mol Med, Davis, CA 95616 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Tomilin, N (reprint author), Russian Acad Sci, Inst Cytol, Lab Chromosome Stabil, St Petersburg 194064, Russia. EM nvtom@mail.ru NR 72 TC 15 Z9 15 U1 0 U2 2 PU AMER SOC CELL BIOLOGY PI BETHESDA PA 8120 WOODMONT AVE, STE 750, BETHESDA, MD 20814-2755 USA SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD MAY PY 2005 VL 16 IS 5 BP 2518 EP 2528 DI 10.1091/mbc.E04-12-1066 PG 11 WC Cell Biology SC Cell Biology GA 921AU UT WOS:000228737400032 PM 15758026 ER PT J AU Mayer, MU Shi, L Squier, TC AF Mayer, MU Shi, L Squier, TC TI One-step, non-denaturing isolation of an RNA polymerase enzyme complex using an improved multi-use affinity probe resin SO MOLECULAR BIOSYSTEMS LA English DT Article ID PROTEIN IDENTIFICATION TECHNOLOGY; UNIVERSAL STRESS-PROTEIN; MASS-SPECTROMETRY; YEAST PROTEOME; CELLS AB The rapid isolation of protein complexes is critical to the goal of establishing protein interaction networks. High-throughput methods for identifying protein binding partners in a way suitable for mass spectrometric identification and structural analysis are required and small molecule/peptide interactions provide the key. We have now shown that a redesigned resin derivatized. with a bisarsenical dye can be used to isolate the Shewanella oneidensis RNA polymerase core enzyme with a tetracysteine-tagged RNA polymerase A as bait protein. A critical advantage of this method is the ability to release the intact complex using a mild, one-step procedure with a competing dithiol. In addition to the identification of the core complex, additional interaction partners, including universal stress protein, were identified. These results provide a path forward to identifying how changes in critical protein complexes over time modulate cell function. C1 Pacific NW Natl Lab, Cell Biol & Biochem Grp, Div Biol Sci, Richland, WA 99452 USA. RP Mayer, MU (reprint author), Pacific NW Natl Lab, Cell Biol & Biochem Grp, Div Biol Sci, Richland, WA 99452 USA. EM Uljana.Mayer@pnl.gov NR 20 TC 18 Z9 18 U1 0 U2 3 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1742-206X J9 MOL BIOSYST JI Mol. Biosyst. PD MAY PY 2005 VL 1 IS 1 BP 53 EP 56 DI 10.1039/b500950b PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 993TK UT WOS:000233977800007 ER PT J AU Weber, TJ Siegel, RW Markille, LM Chrisler, WB Lei, XYC Colburn, NH AF Weber, TJ Siegel, RW Markille, LM Chrisler, WB Lei, XYC Colburn, NH TI A paracrine signal mediates the cell transformation response to low dose gamma radiation in JB6 cells SO MOLECULAR CARCINOGENESIS LA English DT Article DE bystander; response; radiation; paracrine; transformation ID NF-KAPPA-B; ANCHORAGE-INDEPENDENT GROWTH; MOUSE EPIDERMAL-CELLS; HUMAN KERATINOCYTES; ALPHA-PARTICLES; NEOPLASTIC TRANSFORMATION; AP-1; IRRADIATION; EXPRESSION; TRANSACTIVATION AB The carcinogenic response to radiation is complex and may involve adaptive cellular responses as well as a bystander effect mediated by paracrine or intercellular signaling activities. Using a newly developed co-culture model we have examined whether low dose gamma radiation induces the transformation of JB6 mouse epidermal cells as well as nonirradiated bystander cells. Cell transformation response is defined as the acquisition of anchorage-independent growth properties and is quantified by counting colonies on soft agar. Exposure of J136 cells to low dose (2-20 cGy) gamma radiation resulted in an approximate 1.9 +/- 0.1 and 2.8 +/- 0.5-fold increase in cell transformation response when cells were seeded at 1 X 10(4) or 1 X 10(5) cells/dish, relative to respective sham exposed controls. We developed a co-culture model where sham exposed or irradiated JB6 cells were mixed with non-irradiated JB6 cells that had been stably transfected with the enhanced yellow fluorescent protein (EYFP) to enable the distinction of fluorescent bystander-specific colonies. A significant increase in the number of bystander-specific colonies was observed in co-culture with 10 cGy irradiated JB6 cells (224 +/- 9), relative to the number of bystander-specific colonies arising in coculture with sham exposed JB6 cells (55 +/- 16). Our results indicate that low dose radiation induces the transformation of JB6 cells and that a soluble paracrine factor that is secreted by irradiated cells induces the transformation of nonirradiated bystander cells. (c) 2005 Wiley-Liss, Inc. C1 Pacific NW Natl Lab, Richland, WA 99354 USA. NCI, Lab Canc Prevent, Reg Genet Serv, Frederick, MD 21701 USA. RP Weber, TJ (reprint author), Pacific NW Natl Lab, 790 6th St,P7-56, Richland, WA 99354 USA. OI Siegel, Robert/0000-0002-0833-5580 NR 32 TC 15 Z9 17 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0899-1987 J9 MOL CARCINOGEN JI Mol. Carcinog. PD MAY PY 2005 VL 43 IS 1 BP 31 EP 37 DI 10.1002/mc.20092 PG 7 WC Biochemistry & Molecular Biology; Oncology SC Biochemistry & Molecular Biology; Oncology GA 921UB UT WOS:000228789500004 PM 15800926 ER PT J AU Qian, WJ Monroe, ME Liu, T Jacobs, JM Anderson, GA Shen, YF Moore, RJ Anderson, DJ Zhang, R Calvano, SE Lowry, SF Xiao, WZ Moldawer, LL Davis, RW Tompkins, RG Camp, DG Smith, RD AF Qian, WJ Monroe, ME Liu, T Jacobs, JM Anderson, GA Shen, YF Moore, RJ Anderson, DJ Zhang, R Calvano, SE Lowry, SF Xiao, WZ Moldawer, LL Davis, RW Tompkins, RG Camp, DG Smith, RD CA Inflammation Host Response Injury TI Quantitative proteome analysis of human plasma following in vivo lipopolysaccharide administration using O-16/O-18 labeling and the accurate mass and time tag approach SO MOLECULAR & CELLULAR PROTEOMICS LA English DT Article ID CATALYZED O-16-TO-O-18 EXCHANGE; HUMAN SERUM PROTEOME; LIQUID-CHROMATOGRAPHY; SPECTROMETRY; PEPTIDE; O-18; IDENTIFICATION; TECHNOLOGY; QUANTIFICATION; PREDICTION AB Identification of novel diagnostic or therapeutic biomarkers from human blood plasma would benefit significantly from quantitative measurements of the proteome constituents over a range of physiological conditions. Herein we describe an initial demonstration of proteome-wide quantitative analysis of human plasma. The approach utilizes postdigestion trypsin-catalyzed O-16/O-18 peptide labeling, two-dimensional LC-FTICR mass spectrometry, and the accurate mass and time (AMT) tag strategy to identify and quantify peptides/proteins from complex samples. A peptide accurate mass and LC elution time AMT tag data base was initially generated using MS/MS following extensive multidimensional LC separations to provide the basis for subsequent peptide identifications. The AMT tag data base contains >8,000 putative identified peptides, providing 938 confident plasma protein identifications. The quantitative approach was applied without depletion of high abundance proteins for comparative analyses of plasma samples from an individual prior to and 9 h after lipopolysaccharide (LPS) administration. Accurate quantification of changes in protein abundance was demonstrated by both 1: 1 labeling of control plasma and the comparison between the plasma samples following LPS administration. A total of 429 distinct plasma proteins were quantified from the comparative analyses, and the protein abundances for 25 proteins, including several known inflammatory response mediators, were observed to change significantly following LPS administration. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Surg, New Brunswick, NJ 08901 USA. Stanford Univ, Sch Med, Stanford Genome Technol Ctr, Palo Alto, CA 94304 USA. Univ Florida, Coll Med, Dept Surg, Gainesville, FL 32610 USA. Shriners Burn Ctr, Dept Surg, Boston, MA 02114 USA. Harvard Univ, Sch Med, Massachusetts Gen Hosp, Boston, MA 02114 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999,MSIN K8-98, Richland, WA 99352 USA. RI Qian, Weijun/C-6167-2011; Smith, Richard/J-3664-2012; Liu, Tao/A-9020-2013 OI Smith, Richard/0000-0002-2381-2349; Liu, Tao/0000-0001-9529-6550 FU NCRR NIH HHS [P41 RR018522, RR18522]; NIGMS NIH HHS [U54 GM-62119-02, U54 GM062119] NR 35 TC 126 Z9 137 U1 1 U2 18 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 2005 VL 4 IS 5 BP 700 EP 709 DI 10.1074/mcp.M500045-MCP200 PG 10 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 923TS UT WOS:000228932800010 PM 15753121 ER PT J AU Snook, I Barnard, A Russo, S Springal, R Srbinovsky, J AF Snook, I Barnard, A Russo, S Springal, R Srbinovsky, J TI Simulating nano-carbon materials SO MOLECULAR SIMULATION LA English DT Article; Proceedings Paper CT Pacific Rim Conference on Nanoscience CY SEP 07-12, 2004 CL Broome, AUSTRALIA SP Western Australian Govt, Perth Convent Bur, Taylor & Francis, JEOL, Accelrys DE molecular level; nano-tubes; DFT; interconversion ID NANODIAMOND; DIAMOND; ENERGY; PHASE AB The structure of carbon based nano-scale materials is extremely diverse at the molecular level and is very important in determining the properties and potential uses of these materials. Ab initio quantum mechanical methods have proved to be successful in giving insight into this structure. This is especially so, for nano-diamond clusters, -wires and -tubes. Here, we apply ab initio DFT based simulations to study some aspects of the structure and properties of graphene layers and graphene tubes to compare and contrast some of their properties such as energy, interconversion and X-ray spectra. C1 RMIT Univ, Sch Appl Sci, Melbourne, Vic 3001, Australia. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. RP RMIT Univ, Sch Appl Sci, GPO Box 2467V, Melbourne, Vic 3001, Australia. EM ian.snook@rmit.edu.au RI Barnard, Amanda/A-7340-2011; Russo, Salvy/E-5837-2011; snook, ian/A-3427-2009; OI Barnard, Amanda/0000-0002-4784-2382; Russo, Salvy/0000-0003-3589-3040 NR 27 TC 5 Z9 5 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 0892-7022 EI 1029-0435 J9 MOL SIMULAT JI Mol. Simul. PD MAY PY 2005 VL 31 IS 6-7 BP 495 EP 504 DI 10.1080/08927020500035523 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 956PG UT WOS:000231311700015 ER PT J AU Jacobson, AR Heavner, MJ AF Jacobson, AR Heavner, MJ TI Comparison of narrow bipolar events with ordinary lightning as proxies for severe convection SO MONTHLY WEATHER REVIEW LA English DT Article ID TRANSIONOSPHERIC PULSE PAIRS; FORTE SATELLITE; POLARIZATION OBSERVATIONS; PHOTODIODE DETECTOR; ICE-SCATTERING; VHF; TROPICS; PHENOMENOLOGY; EMISSIONS; SIGNALS AB Narrow bipolar events (NBEs) are a recently studied intracloud electrical-discharge process. It is speculated that an NBE is instigated by the extensive atmospheric shower of an energetic cosmic ray. NBEs cause significant relaxation of the charge separation within the electrified cloud in a short time, on the order of 10 mu s. The current flow causes radiation of a distinctive "bipolar" low-frequency/very low frequency signal that can be recorded at locations on earth up to thousands of kilometers from the source. NBEs are preceded/accompanied by the most powerful very high frequency radio emissions seen in any kind of lightning. These intense pulsed radio emissions have been routinely detected with satellite-borne radio receivers in space. Owing to their easy detection and recognition, NBEs might be a useful remote sensing proxy for space-based global, near-real time remote sensing. However, in order for that potential to be realized, NBEs must be shown to be associated, as is ordinary lightning, with severe tropospheric convection, rather than to be just a curiosity of cosmic-ray-atmosphere interactions. This question is addressed with a detailed comparison of NBEs and ordinary lightning using a ground-based lightning-transient research facility that records signals from both ordinary lightning and NBEs, the Los Alamos Sferic-waveform Array (LASA), based in Florida. First, the data from LASA are internally compared to examine the relationship of NBEs and ordinary lightning in both position and time. Second, the relationship of both NBEs and ordinary lightning to simultaneous infrared cloud imagery is examined [from the Geostationary Operational Environmental Satellite-East (GOES-East)] in order to infer the relative affinities of NBEs and ordinary lightning for cloud signatures that are consistent with severe convection. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Alaska SE, Dept Phys, Juneau, AK USA. RP Jacobson, AR (reprint author), Los Alamos Natl Lab, ISR-2,Mail Stop D436, Los Alamos, NM 87545 USA. EM ajacobson@lanl.gov NR 41 TC 43 Z9 48 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD MAY PY 2005 VL 133 IS 5 BP 1144 EP 1154 DI 10.1175/MWR2915.1 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 930CH UT WOS:000229392900007 ER PT J AU Zhao, Q Nardelli, MB Lu, W Bernholc, J AF Zhao, Q Nardelli, MB Lu, W Bernholc, J TI Carbon nanotube-metal cluster composites: A new road to chemical sensors? SO NANO LETTERS LA English DT Article ID FUNCTIONALIZATION; RECOGNITION AB Novel carbon nanotube-metal cluster structures are proposed as prototype systems for molecular recognition at the nanoscale. Ab initio calculations show that already the bare nanotube cluster system displays some specificity because the adsorption of ammonia on a carbon nanotube-Al cluster system is easily detected electrically, while diborane adsorption does not provide an electrical signature. Since there are well-established procedures for attaching molecular receptors to metal clusters, these results provide a "proof-of-principle" for the development of novel, high-specificity molecular sensors. C1 N Carolina State Univ, Ctr High Performance Simulat, Raleigh, NC 27695 USA. N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. Oak Ridge Natl Lab, CCS CMS, Oak Ridge, TN 37831 USA. RP Zhao, Q (reprint author), N Carolina State Univ, Ctr High Performance Simulat, Raleigh, NC 27695 USA. EM zhao@nemo.physics.nesu.edu RI Buongiorno Nardelli, Marco/C-9089-2009 NR 27 TC 150 Z9 155 U1 2 U2 29 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 2005 VL 5 IS 5 BP 847 EP 851 DI 10.1021/nl050167w 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 926KA UT WOS:000229120900006 PM 15884882 ER PT J AU Ellingson, RJ Beard, MC Johnson, JC Yu, PR Micic, OI Nozik, AJ Shabaev, A Efros, AL AF Ellingson, RJ Beard, MC Johnson, JC Yu, PR Micic, OI Nozik, AJ Shabaev, A Efros, AL TI Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots SO NANO LETTERS LA English DT Article ID IMPACT IONIZATION; OPTICAL-PROPERTIES; CARRIER MULTIPLICATION; ELECTRON RELAXATION; SOLAR-CELLS; SEMICONDUCTORS; NANOCRYSTALS; MICROCRYSTALLITES; SPECTROSCOPY; EMISSION AB We report ultra-efficient multiple exciton generation (MEG) for single photon absorption in colloidal PbSe and PbS quantum dots (QDs). We employ transient absorption spectroscopy and present measurement data acquired for both intraband as well as interband probe energies. Quantum yields of 300% indicate the creation, on average, of three excitons per absorbed photon for PbSe QDs at photon energies that are four times the QD energy gap. Results indicate that the threshold photon energy for MEG in QDs is twice the lowest exciton absorption energy. We find that the biexciton effect, which shifts the transition energy for absorption of a second photon, influences the early time transient absorption data and may contribute to a modulation observed when probing near the lowest interband transition. We present experimental and theoretical values of the size-dependent interband transition energies for PbSe QDs. We present experimental and theoretical values of the size-dependent interband transition energies for PbSe QDs, and we also introduce a new model for MEG based on the coherent superposition of multiple excitonic states. C1 Natl Renewable Energy Lab, Ctr Basic Sci, Golden, CO 80401 USA. Univ Colorado, Dept Chem, Boulder, CO 80309 USA. USN, Res Lab, Washington, DC 20375 USA. RP Ellingson, RJ (reprint author), Natl Renewable Energy Lab, Ctr Basic Sci, Golden, CO 80401 USA. EM randy_ellingson@nrel.gov; matt_beard@nrel.gov; arthur_nozik@nrel.gov; efros@dave.nrl.navy.mil RI Ellingson, Randy/H-3424-2013; Nozik, Arthur/A-1481-2012; Nozik, Arthur/P-2641-2016; OI BEARD, MATTHEW/0000-0002-2711-1355 NR 37 TC 1051 Z9 1063 U1 54 U2 640 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 2005 VL 5 IS 5 BP 865 EP 871 DI 10.1021/nl0502672 PG 7 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 926KA UT WOS:000229120900009 PM 15884885 ER PT J AU Karnik, R Fan, R Yue, M Li, DY Yang, PD Majumdar, A AF Karnik, R Fan, R Yue, M Li, DY Yang, PD Majumdar, A TI Electrostatic control of ions and molecules in nanofluidic transistors SO NANO LETTERS LA English DT Article ID ELECTRICAL DOUBLE-LAYER; NANOTUBULE MEMBRANES; TRANSPORT; SILICA; CHANNELS; CHARGE; SEPARATION; INTERFACE; NANOPORE; SYSTEMS AB We report a nanofluidic transistor based on a metal-oxide-solution (MOSol) system that is similar to a metal-oxide-semiconductor field-effect transistor (MOSFET). Using a combination of fluorescence and electrical measurements, we demonstrate that gate voltage modulates the concentration of ions and molecules in the channel and controls the ionic conductance. Our results illustrate the efficacy of field-effect control in nanofluidics, which could have broad implications on integrated nanofluidic circuits for manipulation of ions and biomolecules in sub-femtoliter volumes. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Yang, PD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM p_yang@uclink.berkeley.edu; majumdar@me.berkeley.edu RI Li, Deyu/D-2938-2012; Fan, Rong/B-1613-2014 OI Li, Deyu/0000-0001-8364-0924; NR 31 TC 389 Z9 396 U1 18 U2 148 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 2005 VL 5 IS 5 BP 943 EP 948 DI 10.1021/nl050493b PG 6 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 926KA UT WOS:000229120900023 PM 15884899 ER PT J AU Ratera, I Chen, J Murphy, A Ogletree, DF Frechet, JMJ Salmeron, M AF Ratera, I Chen, J Murphy, A Ogletree, DF Frechet, JMJ Salmeron, M TI Atomic force microscopy nanotribology study of oligothiophene self-assembled films SO NANOTECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Trends in Nanotechnology CY SEP 13-17, 2004 CL Segovia, SPAIN ID FIELD-EFFECT TRANSISTORS; SUPRAMOLECULAR ORGANIZATION; MECHANICAL-PROPERTIES; MOBILITY; ELECTRONICS; LANGMUIR; MICA AB The oligothiophene derivative 4-(5''"-tetradecyl-[2, 2'; 5, 2&DPRIME;; 5&DPRIME;, 2'''; 5''', 2""] pentathiophen-5-yl)-butyric acid (C14-5TBA) was synthesized and the structural and mechanical properties of self-assembled monolayers on mica have been studied by atomic force microscopy (AFM). The films were prepared by drop casting a dilute THF solution (1 mM) of the oligothiophene on mica. Islands containing primarily monolayers with a very small percentage of multilayers were formed. The molecules adsorb through the carboxylic group, and expose the alkyl chain (CH2)(13)CH3. High resolution AFM scans reveal a well ordered structure of molecules with unit cell dimensions of 0.65 and 0.46 nm. Applying load to the tip, the molecular film was gradually compressed from an initial height of 4.1 nm to a final one of 2.6 nm, corresponding to a tilt of the alkyl chains. In regions covered with bilayers the molecules in the second layer were oriented opposite to those in the first layer, thus exposing the carboxylic end group to the air. This second layer was easily removed as the tip pressure increased. C1 Lawrence Berkeley Lab, Surface Sci Dept, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Ratera, I (reprint author), Lawrence Berkeley Lab, Surface Sci Dept, Berkeley, CA 94720 USA. EM iratera@lbl.gov RI Ratera, Imma/E-2353-2014; Ogletree, D Frank/D-9833-2016; OI Ratera, Imma/0000-0002-1464-9789; Ogletree, D Frank/0000-0002-8159-0182; Frechet, Jean /0000-0001-6419-0163 NR 28 TC 7 Z9 7 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD MAY PY 2005 VL 16 IS 5 SI SI BP S235 EP S239 DI 10.1088/0957-4484/16/5/018 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 932MP UT WOS:000229558100019 ER PT J AU Hart, GLW Blum, V Walorski, MJ Zunger, A AF Hart, GLW Blum, V Walorski, MJ Zunger, A TI Evolutionary approach for determining first-principles hamiltonians SO NATURE MATERIALS LA English DT Article ID TRANSITION-METAL ALLOYS; GENETIC ALGORITHM; TRANSFORMATIONS; DISORDER C1 No Arizona Univ, Dept Phys & Astron, Flagstaff, AZ 86011 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. No Arizona Univ, Dept Comp Sci, Flagstaff, AZ 86011 USA. RP Hart, GLW (reprint author), No Arizona Univ, Dept Phys & Astron, Flagstaff, AZ 86011 USA. EM gus.hart@nau.edu RI Zunger, Alex/A-6733-2013; Blum, Volker/J-6591-2012; OI Blum, Volker/0000-0001-8660-7230; Hart, Gus L. W./0000-0002-6149-9234 NR 25 TC 181 Z9 181 U1 2 U2 38 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1476-1122 J9 NAT MATER JI Nat. Mater. PD MAY PY 2005 VL 4 IS 5 BP 391 EP 394 DI 10.1038/nmat1374 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 922JQ UT WOS:000228834000012 PM 15834412 ER PT J AU O'Connell, MJ Eibergen, EE Doorn, SK AF O'Connell, MJ Eibergen, EE Doorn, SK TI Chiral selectivity in the charge-transfer bleaching of single-walled carbon-nanotube spectra SO NATURE MATERIALS LA English DT Article ID IN-SITU RAMAN; FLUORESCENCE SPECTROSCOPY; ELECTRONIC-STRUCTURE; REACTIVITY; ULTRALONG; ROUTE; NIR AB Chiral selective reactivity and redox chemistry of carbon nanotubes are two emerging fields of nanoscience. These areas hold strong promise for producing methods for isolating nanotubes into pure samples of a single electronic type, and for reversible doping of nanotubes for electronics applications. Here, we study the selective reactivity of single-walled carbon nanotubes with organic acceptor molecules. We observe spectral bleaching of the nanotube electronic transitions consistent with an electron-transfer reaction occurring from the nanotubes to the organic acceptors. The reaction kinetics are found to have a strong chiral dependence, with rates being slowest for large-bandgap species and increasing for smaller-bandgap nanotubes. The chiral-dependent kinetics can be tuned to effectively freeze the reacted spectra at a fixed chiral distribution. Such tunable redox chemistry may be important for future applications in reversible non-covalent modification of nanotube electronic properties and in chiral selective separations. C1 Los Alamos Natl Lab, Div Chem, C ACS, Los Alamos, NM 87545 USA. RP O'Connell, MJ (reprint author), Los Alamos Natl Lab, Div Chem, C ACS, Los Alamos, NM 87545 USA. EM skdoorn@lanl.gov NR 28 TC 216 Z9 218 U1 4 U2 80 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1476-1122 J9 NAT MATER JI Nat. Mater. PD MAY PY 2005 VL 4 IS 5 BP 412 EP 418 DI 10.1038/nmat1367 PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 922JQ UT WOS:000228834000017 PM 15821741 ER PT J AU Irwin, J Shmakova, M AF Irwin, J Shmakova, M TI Higher moments in weak gravitational lensing and dark matter structures SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA DE gravitational, lensing : galaxies : clusters; general, (cosmology); dark matter AB We describe techniques for extracting and analyzing sextupole and other higher-order weakly lensed moments. Indications of substructure, via spatial clumping of curved background galaxies, were observed in both Hubble deep fields. We estimate the dark cluster masses in the deep field. (C) 2005 Elsevier B.V. All rights reserved. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Shmakova, M (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM shmakova@slac.stanford.edu NR 7 TC 15 Z9 15 U1 0 U2 1 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 2005 VL 49 IS 2-6 BP 83 EP 91 DI 10.1016/j.newar.2005.01.032 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800010 ER PT J AU Linder, EV AF Linder, EV TI Light thoughts on dark energy SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA AB The physical process leading to the acceleration of the expansion of the universe is unknown. It may involve new high energy physics or extensions to gravitation. Calling this generically dark energy, we examine the consistencies and relations between these two approaches, showing that an effective equation of state function w(z) is broadly useful in describing the properties of the dark energy. A variety of cosmological observations can provide important information on the dynamics of dark energy and the future looks bright for constraining dark energy, though both the measurements and the interpretation will be challenging. We also discuss a more direct relation between the spacetime geometry and acceleration, via "geometric dark energy" from the Ricci scalar, and superacceleration or phantom energy where the fate of the universe may be more gentle than the Big Rip. (C) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM evlinder@lbl.gov NR 8 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1387-6473 EI 1872-9630 J9 NEW ASTRON REV JI New Astron. Rev. PD MAY PY 2005 VL 49 IS 2-6 BP 93 EP 96 DI 10.1016/j.newar.2005.01.025 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800011 ER PT J AU Kusenko, A AF Kusenko, A TI Possible astrophysical clues of dark matter SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA ID NEUTRINO OSCILLATIONS; STERILE NEUTRINOS; ELECTROMAGNETIC PROPERTIES; VELOCITY DISTRIBUTION; MAGNETIC-FIELD; RADIO PULSARS; TRANSPORT AB The supernova physics may provide a clue of the cosmological dark matter. In the absence of new physics, the supernova calculations do not explain the observed velocities of pulsars. However, if there exists a singlet fermion with mass in the 1-20 keV range and a small mixing with neutrinos, this particle could be emitted asymmetrically from a cooling neutron star in the event of a supernova explosion. The asymmetry could explain the long-standing puzzle of pulsar velocities. The same particle could be the dark matter. Observations of X-ray telescopes, as well as a future detection of gravitational waves from a nearby supernova can confirm or rule out this possibility. (C) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Univ Calif Los Angeles, Dept Phys & Astron, POB 951547, Los Angeles, CA 90095 USA. EM kusenko@ucla.edu NR 36 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 EI 1872-9630 J9 NEW ASTRON REV JI New Astron. Rev. PD MAY PY 2005 VL 49 IS 2-6 BP 115 EP 118 DI 10.1016/j.newar.2005.01.038 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800015 ER PT J AU Chen, PS AF Chen, PS TI Inflation induced Planck-size black hole remnants as dark matter SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA DE Primordial black holes : general; (cosmology:) dark matter ID GENERALIZED UNCERTAINTY PRINCIPLE; HYBRID INFLATION; QUANTUM-GRAVITY; COSMOLOGY; RELICS; MASS; PERTURBATION; UNIVERSE AB While there exist various candidates, the identification of dark matter remains unresolved. Recently, it was argued that the generalized uncertainty principle (GUP) may prevent a black hole from evaporating completely, and as a result there should exist a Planck-sized BHR at the end of its evaporation. We speculate that the stability of BHR may be further protected by supersymmetry in the form of extremal black hole. If this is indeed the case and if a sufficient amount of small black holes can be produced in the early universe, then the resultant BHRs can be an interesting candidate for DM. We demonstrate that this is the case in the hybrid inflation model. By assuming BHR as DM, our notion imposes a constraint on the hybrid inflation potential. We show that such a constraint is not fine-tuned. Possible observational signatures are briefly discussed. (C) 2005 Published by Elsevier B.V. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Chen, PS (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM chen@slac.stanford.edu NR 39 TC 22 Z9 22 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 2005 VL 49 IS 2-6 BP 233 EP 239 DI 10.1016/j.newar.2005.01.015 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800034 ER PT J AU Bond, L Collar, JI Ely, J Flake, M Hall, J Jordan, D Nakazawa, D Raskin, A Sonnenschein, A Sullivan, KO AF Bond, L Collar, JI Ely, J Flake, M Hall, J Jordan, D Nakazawa, D Raskin, A Sonnenschein, A Sullivan, KO TI Development of bubble chambers with sensitivity to WIMPs SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA ID DARK-MATTER; SUPERHEATED LIQUIDS; DETECTOR; SEARCH AB Bubble nucleation in moderately superheated liquids can be triggered by nuclear recoils from WIMPs. This phenomenon is the basis for superheated droplet detectors. The droplet technique is currently limited by insensitivity to spin-independent interactions, due to lack of heavy elements in the usual target liquids, and sensitivity to contamination of the get by alpha emitters. As an alternative, we have developed a new type of homogeneous bubble chamber, which can contain heavy liquids, including CF3Br, CF3I, and C3F8. Detectors of this type may be scalable to large size at modest cost and could have very low backgrounds. We discuss results obtained with a 12 ml prototype and plans for a 1 liter chamber. (C) 2005 Published by Elsevier B.V. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Chicago, Dept Phys, Chicago, IL 60637 USA. Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA. RP Pacific NW Natl Lab, Richland, WA 99352 USA. NR 18 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1387-6473 EI 1872-9630 J9 NEW ASTRON REV JI New Astron. Rev. PD MAY PY 2005 VL 49 IS 2-6 BP 271 EP 275 DI 10.1016/j.newar.2005.01.043 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800041 ER PT J AU Aprile, E Giboni, KL Majewski, P Ni, K Yamashita, M Gaitskell, R Sorensen, P DeViveiros, L Baudis, L Bernstein, A Hagmann, C Winant, C Shutt, T Kwong, J Oberlack, U McKinsey, D Hasty, R AF Aprile, E Giboni, KL Majewski, P Ni, K Yamashita, M Gaitskell, R Sorensen, P DeViveiros, L Baudis, L Bernstein, A Hagmann, C Winant, C Shutt, T Kwong, J Oberlack, U McKinsey, D Hasty, R TI The XENON dark matter search experiment SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA DE dark matter; WIMP; xenon ID LIQUID XE; DETECTOR; KR; AR AB The XENON experiment aims at the direct detection of dark matter in the form of Weakly Interacting Massive Particles (WIMPs) via their elastic scattering off Xe nuclei. A fiducial mass of 1000 kg, distributed in 10 independent liquid xenon time projection chambers will be used to probe the lowest interaction cross-section predicted by SUSY models. The TPCs are operated in dual (liquid/gas) phase, to allow a measurement of nuclear recoils down to 16 keV energy, via simultaneous detection of the ionization, through secondary scintillation in the gas, and primary scintillation in the liquid. The distinct ratio of primary to secondary scintillation for nuclear recoils from WIMPs (or neutrons), and for electron recoils from background, is key to the event-by-event discrimination capability of XENON. A dual phase xenon prototype has been realized and is currently being tested, along with other prototypes dedicated to other measurements relevant to the XENON program, As part of the R&D phase, we will realize and move underground a first XENON module (XENON10) with at least 10 kg fiducial mass to measure the background rejection capability and to optimize the conditions for continuous and stable detector operation underground. We present some of the results from the on-going R&D and summarize the expected performance of the 10 kg experiment, from Monte-Carlo simulations. The main design features of the 100 kg detector unit(XENON100), with which we envisage to make up the I ton sensitive mass of XENONIT will also be presented. (C) 2005 Elsevier B.V. All rights reserved. C1 Columbia Univ, Dept Phys, New York, NY 10027 USA. Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA. Brown Univ, Dept Phys, Providence, RI 02912 USA. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. Rice Univ, Dept Phys, Houston, TX 77251 USA. Yale Univ, Dept Phys, New Haven, CT 06520 USA. RP Aprile, E (reprint author), Columbia Univ, Dept Phys, Mail Code 5247,550 W 12th St,MC 5247, New York, NY 10027 USA. EM age@astro.columbia.edu RI Yamashita, Masaki/A-4300-2011; de Viveiros, Luiz/M-9205-2013 OI de Viveiros, Luiz/0000-0002-7038-2361 NR 10 TC 56 Z9 56 U1 1 U2 4 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 2005 VL 49 IS 2-6 BP 289 EP 295 DI 10.1016/j.newar.2005.01.035 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800044 ER PT J AU Wai, L AF Wai, L CA GLAST LAT Collaboration TI Searches for WIMP annihilation with GLAST SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT 6th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe CY FEB 18-20, 2004 CL Marina del Rey, CA DE GLAST; WIMP; annihilation ID NEUTRALINO DARK-MATTER; GAMMA-RAY EMISSION; EGRET OBSERVATIONS; GALACTIC-CENTER; POINT SOURCES; MILKY-WAY; GALAXY; HALO; CONSTRAINTS; PROPAGATION AB We describe signatures for WIMP annihilation in the gamma ray sky which can be observed by the GLAST mission, scheduled for launch in 2007. We review the search regions, which range from galactic substructure in the Milky Way all the way out to cosmological sources. (C) 2005 Elsevier B.V. All rights reserved. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM wai@slac.stanford.edu NR 45 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1387-6473 EI 1872-9630 J9 NEW ASTRON REV JI New Astron. Rev. PD MAY PY 2005 VL 49 IS 2-6 BP 307 EP 310 DI 10.1016/j.newar.2005.01.020 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 932SD UT WOS:000229572800047 ER PT J AU Classen, AT Langley, JA AF Classen, AT Langley, JA TI Data-model integration is not magic SO NEW PHYTOLOGIST LA English DT Editorial Material ID ELEVATED ATMOSPHERIC CO2; RESPONSES; CARBON; ECOSYSTEM; FOREST; WATER; PRODUCTIVITY; GRASSLAND; GROWTH C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. No Arizona Univ, Dept Biol, Div Environm Sci, Flagstaff, AZ 86011 USA. RP Classen, AT (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. EM classenat@ornl.gov RI Classen, Aimee/C-4035-2008 OI Classen, Aimee/0000-0002-6741-3470 NR 17 TC 8 Z9 8 U1 1 U2 5 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0028-646X J9 NEW PHYTOL JI New Phytol. PD MAY PY 2005 VL 166 IS 2 BP 367 EP 369 DI 10.1111/j.1469-8137.2005.01414.x PG 3 WC Plant Sciences SC Plant Sciences GA 913UK UT WOS:000228178900005 PM 15819902 ER PT J AU Yankeelov, TE Rooney, WD Huang, W Dyke, JP Li, X Tudorica, A Lee, JH Koutcher, JA Springer, CS AF Yankeelov, TE Rooney, WD Huang, W Dyke, JP Li, X Tudorica, A Lee, JH Koutcher, JA Springer, CS TI Evidence for shutter-speed variation in CR bolus-tracking studies of human pathology SO NMR IN BIOMEDICINE LA English DT Article DE contrast reagent; bolus-tracking; multiple sclerosis; invasive ductal carcinoma; osteosarcoma ID TRANSCYTOLEMMAL WATER-EXCHANGE; ARTERIAL INPUT FUNCTION; IN-VIVO; CONTRAST AGENTS; GD-DTPA; MRI; KINETICS; TUMORS; MODEL; INJECTION AB The standard pharmacokinetic model for the analysis of MRI contrast reagent (CR) bolus-trackim, (B-T) data assumes that the mean intracellular water molecule lifetime (tau(i)) is effectively zero. This assertion is inconsistent with a considerable body of physiological measurements. Furthermore, theory and simulation show the B-T time-course shape to be very sensitive to the tau(i) magnitude in the physiological range (hundreds of milliseconds to several seconds). Consequently, this standard model aspect can cause significant underestimations (factors of 2 or 3) of the two parameters usually determined: K-trans, the vascular wall CR transfer rate constant, and v(e), the CR distribution volume (the extracellular, extravascular space fraction). Analyses of animal model data confirmed two predicted behaviors indicative of this standard model inadequacy: (1) a specific temporal pattern for the mismatch between the best-fitted curve and data; and (2) an inverse dependence of the curve's K-trans and v(e) magnitudes on the CR dose. These parameters should be CR close-independent. The most parsimonious analysis allowing for realistic tau(i) values is the 'shutter-speed' model. Its application to the experimental animal data essentially eliminated the two standard model signature inadequacies. This paper reports the first Survey for the extent of this 'shutter-speed effect' in human data. Retrospective analyses are made of clinical data chosen from a range of pathology (the active multiple sclerosis lesion, the invasive ductal carcinoma breast tumor, and osteosarcorna in the leg) that provides a wide variation, particularly of K-trans. The signature temporal mismatch of the standard model is observed in all cases, and is essentially eliminated by use of the shutter-speed model. Pixel-by-pixel maps show that parameter values from the shutter-speed analysis are increased by more than a factor of 3 for some lesion regions. This endows the lesions with very high contrast, and reveals heterogeneities that are often not seen in the standard model maps. Normal muscle regions in the leg allow validation of the shutter-speed model K-trans, v(e) and tau(i) magnitudes, by comparison with results Of previous careful rat leg studies not possible for human subjects. Copyright (c) 2004 John Wiley & Sons, Ltd. C1 Oregon Hlth Sci Univ, Adv Imaging Res Ctr, Portland, OR 97239 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Radiol, Stony Brook, NY 11794 USA. Weill Cornell Med Coll, Dept Radiol, New York, NY 10021 USA. Univ Cincinnati, Dept Biomed Engn, Cincinnati, OH 45267 USA. Mem Sloan Kettering Canc Ctr, Dept Radiol Med Phys & Med, New York, NY 10021 USA. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. RP Springer, CS (reprint author), Oregon Hlth Sci Univ, Adv Imaging Res Ctr, 3181 SW Sam Jackson Pk Rd,Mail Code L452, Portland, OR 97239 USA. EM springer@ohsu.edu RI Lee, Jing-Huei/J-3978-2016; OI Lee, Jing-Huei/0000-0001-9921-7629; Springer, Charles/0000-0002-5966-2135; Dyke, Jonathan/0000-0001-7170-488X FU NCI NIH HHS [P01-CA05826-038A1, R01-CA62556]; NHLBI NIH HHS [R01-HL50139]; NIBIB NIH HHS [R01-EB00422]; NINDS NIH HHS [R01-NS40801] NR 32 TC 52 Z9 53 U1 0 U2 4 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0952-3480 J9 NMR BIOMED JI NMR Biomed. PD MAY PY 2005 VL 18 IS 3 BP 173 EP 185 DI 10.1002/nbm.938 PG 15 WC Biophysics; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy SC Biophysics; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy GA 928GT UT WOS:000229260100003 PM 15578708 ER PT J AU Wieczorek, S Krauskopf, B AF Wieczorek, S Krauskopf, B TI Bifurcations of n-homoclinic orbits in optically injected lasers SO NONLINEARITY LA English DT Article ID LOCKED SEMICONDUCTOR-LASER; NONLINEAR DYNAMICS; DIODE-LASER; GLOBAL BIFURCATIONS; PERIODIC ATTRACTORS; NUMERICAL DETECTION; SADDLE-FOCUS; T-POINTS; CHAOS; SIGNAL AB We study in detail complex structures of homoclinic bifurcations in a threedimensional rate-equation model of a semiconductor laser receiving optically injected light of amplitude K and frequency detuning omega. Specifically, we find and follow in the (K, omega)-plane curves of n-homoclinic bifurcations, where a saddle-focus is connected to itself at the nth return to a neighbourhood of the saddle. We reveal an intricate interplay of codimension-two double-homoclinic and T-point bifurcations. Furthermore, we study how the bifurcation diagram changes with an additional parameter, the so-called linewidth enhancement factor a of the laser. In particular, we find folds (minima) of T-point bifurcation and double-homoclinic bifurcation curves, which are accumulated by infinitely many changes of the bifurcation diagram due to transitions through singularities of surfaces of homoclinic bifurcations. The injection laser emerges as a system that allows one to study codimension-two bifurcations of n-homoclinic orbits in a concrete vector field. At the same time, the bifurcation diagram in the (K, w)-plane is of physical relevance. An example is the identification of regions, and their dependence on the parameter a, of multi-pulse excitability where the laser reacts to a single small perturbation by sending out n pulses. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Bristol, Dept Engn Math, Bristol BS8 1TR, Avon, England. RP Wieczorek, S (reprint author), Sandia Natl Labs, POB 5800,Ms 0601, Albuquerque, NM 87185 USA. OI Krauskopf, Bernd/0000-0002-8940-230X NR 73 TC 17 Z9 17 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0951-7715 J9 NONLINEARITY JI Nonlinearity PD MAY PY 2005 VL 18 IS 3 BP 1095 EP 1120 DI 10.1088/0951-7715/18/3/010 PG 26 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 925XR UT WOS:000229087400010 ER PT J AU Chung, Y Jones, CKRT Schafer, T Wayne, CE AF Chung, Y Jones, CKRT Schafer, T Wayne, CE TI Ultra-short pulses in linear and nonlinear media SO NONLINEARITY LA English DT Article ID RENORMALIZATION-GROUP; OPTICAL FIBERS; WAVE-EQUATIONS; PROPAGATION; ASYMPTOTICS; CYCLE AB We consider the evolution of ultra-short optical pulses in linear and nonlinear media. For the linear case, we first show that the initial-boundary value problem for Maxwell's equations in which a pulse is injected into a quiescent medium at the left endpoint can be approximated by a linear wave equation which can then be further reduced to the linear short-pulse equation (SPE). A rigorous proof is given that the solution of the SPE stays close to the solutions of the original wave equation over the time scales expected from the multiple scales derivation of the SPE. For the nonlinear case we compare the predictions of the traditional nonlinear Schrodinger equation (NLSE) approximation with those of the SPE. We show that both equations can be derived from Maxwell's equations using the renormalization group method, thus bringing out the contrasting scales. The numerical comparison of both equations with Maxwell's equations shows clearly that as the pulse length shortens, the NLSE approximation becomes steadily less accurate, while the SPE provides a better and better approximation. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ N Carolina, Dept Math, Chapel Hill, NC 27599 USA. Brown Univ, Div Appl Math, Providence, RI 02912 USA. Boston Univ, Dept Math, Boston, MA 02215 USA. Boston Univ, Ctr Biodynam, Boston, MA 02215 USA. RP Chung, Y (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. EM yehung@cnls.lanl.gov; ckrtj@email.unc.edu; tobias@cfm.brown.edu; cew@math.bu.edu NR 19 TC 73 Z9 74 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0951-7715 J9 NONLINEARITY JI Nonlinearity PD MAY PY 2005 VL 18 IS 3 BP 1351 EP 1374 DI 10.1088/0951-7715/18/3/021 PG 24 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 925XR UT WOS:000229087400021 ER PT J AU McMichael, GA McKinstry, CA Vucelick, JA Lukas, JA AF McMichael, GA McKinstry, CA Vucelick, JA Lukas, JA TI Fall Chinook salmon spawning activity versus daylight and flow in the tailrace of a large hydroelectric Dam SO NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT LA English DT Article ID BEHAVIOR; MODEL AB We deployed an acoustic system during the spawning season for fall Chinook salmon Oncorhynchus tshawytscha in 2001 to determine whether fall Chinook salmon spawning activity in a hydroelectric dam tailrace area was affected by daylight or river flow. Our study design allocated sampling effort nearly equally between hours of darkness and hours of daylight throughout each 24-h period. The acoustic system recorded sounds of fall Chinook salmon spawning activity in two index areas downstream of Wanapum Dam on the Columbia River in Washington State. One index area was a deepwater spawning site located in 9-11 m of water. The other index area was a moderate-depth midchannel bar, where water depths ranged from 2.5 to 6 m. We defined the rate of spawning activity in digs per minute. Fall Chinook salmon spawning activity rates in the Wanapum Dam tailrace were influenced by both daylight and river discharge, which had a pronounced nonlinear effect on spawning activity rates. To account for nonlinearity, a generalized additive model was used to characterize the combined effects of river flow and daylight. The final model also suggested that both flow and daylight influenced spawning activity. Spawning activity occurred during both daylight and darkness, significantly more activity occurring during daylight in both index areas. Spawning activity was generally highest at project discharges between 1,700 and 2,266 m(3)/s in both spawning areas; spawning activity diminished as discharge increased from 3,400 to 4,250 m(3)/s. We concluded that fall Chinook salmon spawning activity in this regulated discharge environment was affected more by flow (and velocity) than by daylight. C1 Pacific NW Natl Lab, Ecol Grp, Richland, WA 99352 USA. Pacific NW Natl Lab, Stat Grp, Richland, WA 99352 USA. Pacific NW Natl Lab, Ecol Grp, Richland, WA 99352 USA. Dept Nat Resources & Regulatory Affairs, Ephrata, WA 98823 USA. RP McMichael, GA (reprint author), Pacific NW Natl Lab, Ecol Grp, Mail Stop K6-85,POB 999, Richland, WA 99352 USA. EM geoffrey.mcmichael@pnl.gov NR 21 TC 9 Z9 9 U1 1 U2 8 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 2005 VL 25 IS 2 BP 573 EP 580 DI 10.1577/M04-044.1 PG 8 WC Fisheries SC Fisheries GA 936ET UT WOS:000229839000017 ER PT J AU Kondev, FG AF Kondev, FG TI Nuclear Data Sheets for A=203 SO NUCLEAR DATA SHEETS LA English DT Review ID 279 KEV TRANSITION; HIGH-SPIN STATES; NEUTRON-DEFICIENT ISOTOPES; ALPHA-DECAY PROPERTIES; HALF-LIFE MEASUREMENTS; INTERNAL-CONVERSION COEFFICIENTS; POLONIUM ISOTOPES; BISMUTH ISOTOPES; LEAD ISOTOPES; CHARGE RADII AB Evaluated nuclear structure and decay data for all nuclei within the A=203 mass chain are presented. C1 Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA. RP Kondev, FG (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 190 TC 11 Z9 11 U1 1 U2 4 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-3752 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD MAY PY 2005 VL 105 IS 1 BP 1 EP + DI 10.1016/j.nds.2005.05.001 PG 107 WC Physics, Nuclear SC Physics GA 941JP UT WOS:000230211400001 ER PT J AU Singh, B Tuli, JK AF Singh, B Tuli, JK TI Nuclear Data Sheets for A=233 SO NUCLEAR DATA SHEETS LA English DT Review ID PARTICLE EMISSION PROBABILITIES; STATE ROTATIONAL BANDS; P-WAVE RESONANCES; DECAY SCHEME DATA; HALF-LIFE; ACTINIDE NUCLEI; ALPHA-DECAY; HEAVY-NUCLEI; ANGULAR-CORRELATIONS; URANIUM ISOTOPES AB The available nuclear structure information for nine known nuclei (Ra,Ac,Th,Pa,U,Np,Pu,Am,Cm) with mass number A 233 is presented. Various decay and reaction data are evaluated and compared. Adopted data, levels, gammas, level half-lives, spins, parities, and configuration assignments are given. No excited states are yet known in Ra-233, Ac-233, Pu-233, Am-233 and Cm-233. The present work supersedes earlier evaluations of A=233 by Y.A. Akovali published in Nuclear Data Sheets (1990Ak02,1978E104,1971E113), covering literature up to December 1988. C1 McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada. Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA. RP Singh, B (reprint author), McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada. NR 216 TC 25 Z9 25 U1 1 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-3752 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD MAY PY 2005 VL 105 IS 1 BP 109 EP + DI 10.1016/j.nds.2005.05.002 PG 112 WC Physics, Nuclear SC Physics GA 941JP UT WOS:000230211400002 ER PT J AU Bakhtiari, M Tamai, H Kawano, Y Kramer, GJ Isayama, A Nakano, T Kamiya, Y Yoshino, R Miura, Y Kusama, Y Nishida, Y AF Bakhtiari, M Tamai, H Kawano, Y Kramer, GJ Isayama, A Nakano, T Kamiya, Y Yoshino, R Miura, Y Kusama, Y Nishida, Y TI Study of plasma termination using high-Z noble gas puffing in the JT-60U tokamak SO NUCLEAR FUSION LA English DT Article ID RUNAWAY ELECTRONS; IMPURITY PELLETS; DISRUPTION; SHUTDOWN; AVALANCHE; INJECTION AB Argon, krypton and xenon were puffed with and without simultaneous hydrogen gas puffing into Ohmically heated plasmas of the JT-60U tokamak with low plasma currents in order to study the capability of disruption mitigation. It was found that krypton gas puffing can provide a plasma termination with smaller amounts of runaway electrons in comparison to argon and xenon gas puffing. C1 Japan Atom Energy Res Inst, Naka Fus Res Estab, Ibaraki, Japan. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Utsunomiya Univ, Utsunomiya, Tochigi 321, Japan. RP Japan Atom Energy Res Inst, Naka Fus Res Estab, Ibaraki, Japan. EM bakhtiar@fusion.naka.jaeri.go.jp NR 19 TC 34 Z9 36 U1 1 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0029-5515 EI 1741-4326 J9 NUCL FUSION JI Nucl. Fusion PD MAY PY 2005 VL 45 IS 5 BP 318 EP 325 DI 10.1088/0029-5515/45/5/002 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 936EY UT WOS:000229839500003 ER PT J AU Reiman, A Zarnstorff, M Mikkelsen, D Owen, L Mynick, H Hudson, S Monticello, D AF Reiman, A Zarnstorff, M Mikkelsen, D Owen, L Mynick, H Hudson, S Monticello, D TI Effect of ambipolar plasma flow on the penetration of resonant magnetic perturbations in a quasi-axisymmetric stellarator SO NUCLEAR FUSION LA English DT Article ID RADIAL ELECTRIC-FIELD; NEOCLASSICAL TRANSPORT; ROTATING PLASMAS; ERROR FIELDS; ASPECT RATIO; DIII-D; EQUILIBRIA; TOKAMAK; MODE; RECONNECTION AB A reference equilibrium for the US National Compact Stellarator Experiment is predicted to be sufficiently close to quasi-symmetry to allow the plasma to flow in the toroidal direction with little viscous damping, yet to have sufficiently large deviations from quasi-symmetry that nonambipolarity significantly affects the physics of the shielding of resonant magnetic perturbations by plasma flow. The unperturbed velocity profile is modified by the presence of an ambipolar potential, which produces a broad velocity profile. In the presence of a resonant magnetic field perturbation, nonambipolar transport produces a radial current, and the resulting j x B force resists departures from the ambipolar velocity and enhances the shielding. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Reiman, A (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM reiman@pppi.gov RI Hudson, Stuart/H-7186-2013 OI Hudson, Stuart/0000-0003-1530-2733 NR 32 TC 4 Z9 4 U1 0 U2 3 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD MAY PY 2005 VL 45 IS 5 BP 360 EP 367 DI 10.1088/0029-5515/45/5/006 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 936EY UT WOS:000229839500007 ER PT J AU Reimerdes, H Bialek, J Chance, MS Chu, MS Garofalo, AM Gohil, P In, Y Jackson, GL Jayakumar, RJ Jensen, TH Kim, JS La Haye, RJ Liu, YQ Menard, JE Navratil, GA Okabayashi, M Scoville, JT Strait, EJ Szymanski, DD Takahashi, H AF Reimerdes, H Bialek, J Chance, MS Chu, MS Garofalo, AM Gohil, P In, Y Jackson, GL Jayakumar, RJ Jensen, TH Kim, JS La Haye, RJ Liu, YQ Menard, JE Navratil, GA Okabayashi, M Scoville, JT Strait, EJ Szymanski, DD Takahashi, H TI Measurement of resistive wall mode stability in rotating high-beta DIII-D plasmas SO NUCLEAR FUSION LA English DT Article ID STABILIZATION; TOKAMAKS; FEEDBACK AB Toroidal plasma rotation of the order of a few per cent of the Alfven velocity can stabilize the resistive wall mode (RWM) and extend the operating regime of tokamaks from the conventional, ideal magnetohydrodynamic (MHD) no-wall limit up to the ideal MHD ideal-wall limit. The stabilizing effect has been measured in DIII-D passively by measuring the critical plasma rotation required for stability and actively by probing the plasma with externally applied resonant magnetic fields. The comparison of these measurements to predictions of rotational stabilization of the sound wave damping and of the kinetic damping model using the MARS-F code results in qualitative agreement, but also indicates the need for further refinement of the measurements and models. C1 Columbia Univ, New York, NY 10027 USA. Gen Atom Co, San Diego, CA USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. FAR TECH Inc, San Diego, CA USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Chalmers Univ Technol, S-41296 Gothenburg, Sweden. RP Reimerdes, H (reprint author), Columbia Univ, New York, NY 10027 USA. EM reimerdes@fusion.gat.com OI Menard, Jonathan/0000-0003-1292-3286 NR 27 TC 51 Z9 51 U1 0 U2 3 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD MAY PY 2005 VL 45 IS 5 BP 368 EP 376 DI 10.1088/0029-5515/45/5/007 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 936EY UT WOS:000229839500008 ER PT J AU Trakhtenberg, E Tcheskidov, V Vasserman, I Vinokurov, N Erdmann, M Pfluger, J AF Trakhtenberg, E Tcheskidov, V Vasserman, I Vinokurov, N Erdmann, M Pfluger, J TI Undulator for the LCLS project - from the prototype to the full-scale manufacturing SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 15th International Synchrotron Radiation Conference (SR-2004) CY JUL 19-23, 2004 CL Novosibirsk, RUSSIA DE hybrid undulator; synchrotron radiation; SASE AB The design of a new hybrid-type undulator with a fixed gap of 6.4 mm, a period of 30 mm and a length of 3.4 m is presented. The fractional variations in deflection parameter K between segments of 130.4-m-long undulator line for the Linac Coherent Light Source (LCLS) must be <= 1.5 x 10(-4). Major design features and their choices are discussed. Lessons learned while working with this prototype are critical for successful project execution. Although the prototype undulator met all of the LCLS specifications, development continued in order to simplify the system. A canted-pole geometry was adopted, which allows the K value to be changed by lateral translation of the entire undulator segment. The prototype undulator was subsequently modified to test the canted-pole concept. Magnetic measurements demonstrated that the undulator with canted poles meets all LCLS specifications and is more cost effective to implement. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. HASYLAB, Deutsch Electron Synchrotron DESY, D-22603 Hamburg, Germany. RP Trakhtenberg, E (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. EM emil@aps.anl.gov NR 4 TC 8 Z9 8 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 2005 VL 543 IS 1 BP 42 EP 46 DI 10.1016/j.nima.2005.01.110 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 927MT UT WOS:000229198700008 ER PT J AU Fliller, RP Drees, A Gassner, D Hammons, L McIntyre, G Peggs, S Trbojevic, D Biryukov, V Chesnokov, Y Terekhov, V AF Fliller, RP Drees, A Gassner, D Hammons, L McIntyre, G Peggs, S Trbojevic, D Biryukov, V Chesnokov, Y Terekhov, V TI RHIC crystal collimation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT International Workshop on Relativistic Channeling and Related Coherent Phenomena CY MAR 23-26, 2004 CL Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, ITALY HO Ist Nazl Fis Nucl, Lab Nazl Frascati DE collimation; channeling; crystal; background; halo AB A new application of bent crystals is to use them to channel halo particles of circulating stored beams into a downstream collimator. By deflecting the halo particles into a collimator with such a crystal, it may be possible to improve the collimation efficiency as compared to a standard two stage collimation system. Prior to 2003, a bent crystal was installed in one ring (i.e. yellow) of the relativistic heavy ion collider (RHIC). We give a report of our channeling studies in RHIC and describe our experience using the bent crystal as a collimator. The results are discussed and compared to simulations and theoretical predictions. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA. Inst High Energy Phys, Protvino, Moscow Region, Russia. RP Fliller, RP (reprint author), Fermilab Natl Accelerator Lab, MS306,POB 500, Batavia, IL 60510 USA. EM fliller@fnal.gov RI Hammons, Lee/D-6041-2013; Biryukov, Valery/C-8432-2017 OI Hammons, Lee/0000-0001-7066-8960; Biryukov, Valery/0000-0002-3591-7762 NR 5 TC 35 Z9 35 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 2005 VL 234 IS 1-2 BP 47 EP 56 DI 10.1016/j.nimb.2005.03.004 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 941CA UT WOS:000230191100007 ER PT J AU Carrigan, RA AF Carrigan, RA TI Studying and applying channeling at extremely high bunch charges SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT International Workshop on Relativistic Channeling and Related Coherent Phenomena CY MAR 23-26, 2004 CL Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, ITALY HO Ist Nazl Fis Nucl, Lab Nazl Frascati ID HIGH-ENERGY; ACCELERATION; RADIATION; ELECTRONS; CRYSTALS; DIAMOND; SILICON AB The potentially high plasma densities possible in solids might produce extremely high acceleration gradients. However, solid-state plasmas could pose daunting challenges. Crystal channeling has been suggested as a mechanism to ameliorate these problems. A high-density plasma in a crystal lattice could quench the channeling process. There is no experimental or theoretical guidance on channeling for intense charged particle beams. An experiment has been carried out at the Fermilab A0 photoinjector to observe electron channeling radiation at high bunch charges. An electron beam with up to 8 nC per electron bunch was used to investigate the electron-crystal interaction. No evidence was found of quenching of channeling at charge densities two orders of magnitude larger than in earlier experiments. Possible new channeling experiments are discussed for the much higher bunch charge densities and shorter times required to probe channeling breakdown and plasma behavior. (c) 2004 Elsevier B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Carrigan, RA (reprint author), Fermilab Natl Accelerator Lab, PO Box 500,MS 221,13 Wilson Hall,W Rm 1374, Batavia, IL 60510 USA. EM carrigan@fnal.gov NR 25 TC 2 Z9 2 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 2005 VL 234 IS 1-2 BP 116 EP 121 DI 10.1016/j.nimb.2004.11.028 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 941CA UT WOS:000230191100013 ER PT J AU Olson, RE Fiol, J Perez, J Beiersdorfer, P AF Olson, RE Fiol, J Perez, J Beiersdorfer, P TI Dynamics of collisions revealed by classical methods SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 8th Workshop on Fast Ion-Atom Collisions CY SEP 01-03, 2004 CL Debrecen, HUNGARY DE ion-atom collisions ID ION-ATOM COLLISIONS; SINGLE-IONIZATION; CROSS-SECTIONS; CHARGED IONS; HELIUM; HYDROGEN; IMPACT AB Single ionization of helium by impact of 3.6 MeV/u Au53+ ions is investigated by means of quantum and classical methods. Calculation of fully differential cross sections are compared to recently published data for ionization of low-energy electrons as a function of the momentum transferred by the projectile to the target system. The results show that inclusion of the resolution and uncertainties present in the experiment has a major influence on both the shape and magnitude of the calculated cross sections. The effect of using a two-electron model For the He target along with including electron-electron correlation are also investigated. However, after incorporating all the experimental conditions within the calculations, the one- and two-electron results present similar behavior, (c) 2005 Published by Elsevier B.V. C1 Univ Missouri, Dept Phys, Rolla, MO 65401 USA. Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Luther Coll, Dept Phys, Decorah, IA 52101 USA. Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94551 USA. RP Olson, RE (reprint author), Univ Missouri, Dept Phys, Rolla, MO 65401 USA. EM olson@umr.edu NR 14 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 2005 VL 233 BP 12 EP 18 DI 10.1016/j.nimb.2005.03.080 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 939HP UT WOS:000230063600004 ER PT J AU Reinhold, CO Burgdorfer, J Dunning, FB AF Reinhold, CO Burgdorfer, J Dunning, FB TI Collisional decoherence in very-high-n Rydberg atoms SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 8th Workshop on Fast Ion-Atom Collisions CY SEP 01-03, 2004 CL Debrecen, HUNGARY DE collisional decoherence; Rydberg wavepackets ID HALF-CYCLE PULSES; ELECTRONIC WAVE-PACKETS; ION-SOLID COLLISIONS; RARE-GAS ATOMS; CHARGE-TRANSFER; CHANGING COLLISIONS; CROSS-SECTIONS; STATES; IONIZATION; SCATTERING AB Collisional interactions represent a major source of decoherence for a gas of Rydberg atoms. We investigate the irreversible dephasing of coherently excited Rydberg wavepackets due to decoherence in collisions with ambient rare gas atoms. We show that the rate of decoherence provides a sensitive tool for measuring quasi-clastic electron-atom (or molecule) collisions at energies extending down to micro electron volts, We present proof of principle calculations for n similar or equal to 388 potassium Rydberg atoms in an ambient gas of xenon atoms, (c) 2005 Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA. RP Reinhold, CO (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM reinhold@ornl.gov OI Reinhold, Carlos/0000-0003-0100-4962 NR 53 TC 7 Z9 7 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 2005 VL 233 BP 48 EP 55 DI 10.1016/j.nimb.2005.03.085 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 939HP UT WOS:000230063600009 ER PT J AU Shoghi-Jadid, K Barrio, JR Kepe, V Wu, HM Small, GW Phelps, ME Huang, SC AF Shoghi-Jadid, K Barrio, JR Kepe, V Wu, HM Small, GW Phelps, ME Huang, SC TI Imaging beta-amyloid fibrils in Alzheimer's disease: a critical analysis through simulation of amyloid fibril polymerization SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article DE Alzheimer's disease; amyloid fibril; polymerization; imaging; amyloid burden; mathematical model ID BLOOD-BRAIN-BARRIER; IN-VIVO; SENILE PLAQUES; APOLIPOPROTEIN-E; NEUROFIBRILLARY TANGLES; PROTEIN FIBRILLOGENESIS; KINETIC-PARAMETERS; COGNITIVE DECLINE; DOWN-SYNDROME; PEPTIDE AB The polymerization of beta-amyloid (A) peptides into fibrillary plaques is implicated, in pail, in the pathogenesis of Alzheimer's disease. A beta molecular imaging probes (A beta-MIPs) have been introduced in an effort to quantity amyloid burden or load, in subjects afflicted with AD by invoking the classic PET receptor model for the quantitation of neuronal receptor density. In this communication, we explore conceptual differences between imaging the density of amyloid fibril polymers and neuronal receptors. We formulate a mathematical model for the polymerization of A beta with parameters that are mapped to biological modulators of fibrillogenesis and introduce a universal measure for amyloid load to accommodate various interactions of A beta-MIPs with fibrils. Subsequently, we hypothesize four A beta-MIPs and utilize the fibrillogenesis model to simulate PET tissue time activity Curves (TACs). Given the unique nature of polymer growth and resulting PET TAC, the four probes report differing amyloid burdens for a given brain pathology, thus complicating the interpretation of PET images. In addition, we introduce the notion of an MIP's resolution, apparent maximal binding site concentration, optimal kinetic topology and its resolving power in characterizing the pathological progression of AD and the effectiveness of drug therapy. The concepts introduced in this work call for a new paradigm that goes beyond the classic parameters and B-max K-D to include binding characteristics to polymeric peptide aggregates such as amyloid fibrils, neurofibrillary tangles and prions. (c) 2005 Elsevier Inc. All rights reserved. C1 Univ Calif Los Angeles, David Geffen Sch Med, Dept Biomath, Hlth Sci Ctr, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, David Geffen Sch Med, Dept Mol & Med Pharmacol, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, David Geffen Sch Med, Dept Psychiat & Biobehav Sci, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, David Geffen Sch Med, DOE Ctr Mol Med, Los Angeles, CA 90095 USA. RP Shoghi-Jadid, K (reprint author), Univ Calif Los Angeles, David Geffen Sch Med, Dept Biomath, Hlth Sci Ctr, AV-617, Los Angeles, CA 90095 USA. EM kshoghi@mednet.ucla.edu RI Shoghi, Kooresh/H-7398-2014 OI Shoghi, Kooresh/0000-0003-3204-457X NR 89 TC 28 Z9 28 U1 0 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0969-8051 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD MAY PY 2005 VL 32 IS 4 BP 337 EP 351 DI 10.1016/j.nucmedbio.2005.02.003 PG 15 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 930MR UT WOS:000229420600004 PM 15878503 ER PT J AU Li, Z Gifford, A Liu, Q Thotapally, R Ding, YS Makriyannis, A Gatley, SJ AF Li, Z Gifford, A Liu, Q Thotapally, R Ding, YS Makriyannis, A Gatley, SJ TI Candidate PET radioligands for cannabinoid CB1 receptors: [F-18]AM5144 and related pyrazole compounds SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article DE radiosynthesis; fluorine-18; cannabinoid receptors; pyrazole; lipophilicity ID POSITRON-EMISSION-TOMOGRAPHY; BRAIN INCORPORATION; P-GLYCOPROTEIN; IN-VIVO; F-18; RAT; LIPOPHILICITY; ANTAGONISTS; BINDING; BIODISTRIBUTION AB Introduction: The mammalian brain contains abundant G protein-coupled cannabinoid CB1 receptors that respond to Delta(9)-tetrahydrocannabinol, the active ingredient of cannabis. The availability of a positron emission tomography (PET) radioligand would facilitate studies of the addictive and medicinal properties of compounds that bind to this receptor. Among the known classes of ligands for CB1 receptors, the pyrazoles are attractive targets for radiopharmaceutical development because they are antagonists and are generally less lipophilic than the other classes. Methods: A convenient high-yield synthesis of N-(4-[F-18]fluorophenyl)-5-(4-bromoplienyl)-1-(2,4-dichloroplienyl)-1H-pyrazole-3-carboxamide (AM5144) was devised by coupling the appropriate pyrazole-3-carboxyl chloride compound with 4-[F-18]fluoroaniline. The labeled precursor was synthesized from 1-[F-18]fluoro-4-nitrobenzene in 60% radiochemical yield for 10 min using an improved procedure involving sodium borohydride reduction with cobalt chloride catalysis. The product was purified by HPLC to give a specific activity >400 mCi/mu mol and a radiochemical purity >95%, and a PET study was conducted ill a baboon. Results: Although the regional uptake of AM5144 in baboon brain was consistent with binding to cannabinoid CB1 receptors, absolute uptake at <0.003% injected radioactivity per cubic centimeter was lower than the previously reported uptake of the radioiodinated pyrazole AN4281. Conclusions: The relatively poor brain uptake of AM5144 and other pyrazole CB1 receptor ligands is not surprising because of their high lipophilicity as compared with most brain PET radiotracers. However, for nine pyrazole compounds for which rodent data are available, brain uptake and calculated logP values are not correlated. Thus, high logP values should not preclude evaluation of radiotracers for targets such as the CB1 receptor that may require very lipophilic ligands. (c) 2005 Elsevier Inc. All rights reserved. C1 Northeastern Univ, Ctr Drug Discovery, Boston, MA 02115 USA. Brookhaven Natl Lab, Ctr Translat Neuroimaging, Upton, NY 11973 USA. RP Gatley, SJ (reprint author), Northeastern Univ, Ctr Drug Discovery, Boston, MA 02115 USA. EM s.gatley@neu.edu FU NIDA NIH HHS [P02 DA099158] NR 38 TC 16 Z9 16 U1 2 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0969-8051 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD MAY PY 2005 VL 32 IS 4 BP 361 EP 366 DI 10.1016/j.nucmedbio.2005.02.007 PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 930MR UT WOS:000229420600006 PM 15878505 ER PT J AU Lin, KS Ding, YS Kim, SW Kil, KE AF Lin, KS Ding, YS Kim, SW Kil, KE TI Synthesis, enantiomeric resolution, F-18 labeling and biodistribution of reboxetine analogs: promising radioligands for imaging the norepinephrine transporter with positron emission tomography SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article DE reboxetine; chiral HPLC; fluoroethylation; 1-bromo-2-[F-18]fluoroethane; in vivo defluorination; deuterium isotope effect ID IN-VIVO EVALUATION; PERFORMANCE LIQUID-CHROMATOGRAPHY; CHIRAL STATIONARY PHASES; BIOLOGICAL EVALUATION; PET; BRAIN; RADIOTRACERS; DERIVATIVES; SEPARATION; BROMIDE AB Racemic and enantiomerically pure ((S,S) and (R,R)) 2-[alpha-(2-(2-[F-18]fluoroethoxy)phenoxy)benzyl]morpholine ([F-18]FRB) and its tetradeuterated form [F-18]FRB-D-4, analogs of the highly selective norepinephrine reuptake inhibitor reboxetine (2-[alpha-(2-ethoxyphenoxy) benzyl]morpholine, RB), have been synthesized for studies of norepinephrine transporter (NET) system with positron emission tomography (PET). The [F-18]fluorinated precursor, (S,S)/(R,R,-N-tert-butyloxycarbonyl-2-[alpha-(2-hydroxyphenoxy)benzyl]morpoline ((S,S)/(R,R)-NBoc-desethylRB), was prepared by the N-protection of (S,S)/(R,R)-2-[alpha-(2-liydroxyphenoxy)benzyl]morplioline ((S,S)/(R,R)-descthylRB) with a tert-butyloxycarbonyl (Boc) group followed by enaritiomeric resolution With chiral H PLC to provide both (S,S) and (R,R) enantiomers with >99% enantiomeric purity. These compounds were then used for radiosynthesis to prepare enantiomerically Pure [18F]FRB and [F-18]FRB-D-4 via the following three-step procedure: 1) formation of 1-bromo-2-[F-18]fluorocthane ([F-18]BFE or [F-18]BFE-D-4) by nucleophilic displacement of 2-bromoethyl triflate (or D-4 analog) with no-carrier added [F-18]F- in THE; (2) reaction of [18F]BFE (or [F-18]BFE-D-4) with N-Boc-clesethylRB in DMF in the presence of excess base; and (3) deprotection with trifluoroacetic acid. The racemates, (S,S) and (R,R) enantiomers of [F-18]FRB and [F-18]FRB-D-4 were obtained in 11-27% (decay corrected to the end of bombardment, EOB) in 120-min synthesis time with a radiochemical purity of >98% and specific activities of 21-48 GBq/mu-mol (EOB). The results of the wholebody biodistribution studies with (S,S)-[F-18]FRB-D-4 were similar to those with (S,S)-[F-18]FRB but showed relatively faster blood clearance and no significant in vivo defluorination. Positron emission tomography Studies in baboon brain also showed that (S,S)-[F-18]FRB-D-4 may be a potentially useful ligand for imaging NET with PET. (c) 2005 Elsevier Inc. All rights reserved. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Ding, YS (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM ding@bnl.gov OI Lin, Kuo-Shyan/0000-0002-0739-0780 FU NIBIB NIH HHS [EB002630]; NIDA NIH HHS [DA-06278] NR 41 TC 16 Z9 16 U1 0 U2 7 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0969-8051 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD MAY PY 2005 VL 32 IS 4 BP 415 EP 422 DI 10.1016/j.nucmedbio.2005.02.005 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 930MR UT WOS:000229420600012 PM 15878511 ER PT J AU Cooper, PS AF Cooper, PS CA Selex Collaboration TI First observation of a new narrow D-sJ(+) meson at 2632 MeV/C-2 SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Cooper, PS (reprint author), Fermilab Natl Accelerator Lab, POB 500,MS 234, Batavia, IL 60510 USA. EM pcooper@fnal.gov NR 1 TC 0 Z9 0 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 2005 VL 142 BP XV EP XV DI 10.1016/S0920-5632(05)00163-5 PG 1 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000004 ER PT J AU Gomes, RA AF Gomes, RA CA KTeV Collaboration TI Observation of the Xi(0) -> Sigma(+) mu(-)(nu)over-bar(mu) decay SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB The KTeV experiment at Fermilab provides a good opportunity to investigate the neutral cascade semi-leptonic decays. The Xi(o) muon semi-leptonic decay, Xi(o) --> Sigma(-) mu(-)(nu) over bar (mu) is suppressed by phase space with only 21 MeV of release energy, making it difficult to be investigated. The study of this decay has a theoretical motivation since it provides another instance to test the Standard Model of particle physics. In this analysis we have observed the Xi(o) --> Sigma(+) mu(-)(nu) over bar (mu) decay and measured its Branching Ratio using Xi(o) --> Lambda pi(o) decay as the normalization mode. C1 UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Gomes, RA (reprint author), UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. EM ragomes@fnal.gov RI Gomes, Ricardo/B-6899-2008; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Gomes, Ricardo/0000-0003-0278-4876; NR 5 TC 0 Z9 0 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 2005 VL 142 BP 16 EP 20 DI 10.1016/j.nuclphysbps.2005.01.003 PG 5 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000007 ER PT J AU Ramberg, E AF Ramberg, E TI A rare charged kaon experiment at Fermilab SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB The measurement of the branching ratio for K+ --> pi(+)nu(nu) over bar is considered to be one of the best ways of measuring the CKM matrix element V-td. The BNL experiments E787 and E949 have seen 3 instances of this decay, using a stopped kaon beam. To improve the statistics enough to make a good measurement will require a decay-in-flight experiment. Fermilab has approved such an experiment-E921. The status of this experiment and a new proposed experiment-P940-is discussed here. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ramberg, E (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM ramberg@fnal.gov NR 5 TC 0 Z9 0 U1 0 U2 1 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 2005 VL 142 BP 47 EP 51 DI 10.1016/j.nuclphysbps.2005.01.009 PG 5 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000013 ER PT J AU Whitmore, J AF Whitmore, J CA KTeV Collaboration TI K-L(0) -> pi(0)l(l)over-bar searches at KTeV SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID RARE DECAY AB There has been renewed interest in the CP violating rare decay modes K-L(o) --> pi(o)l (l) over bar. Recent measurements, such as the BR(K-s(o) --> pi(o)l(+)l(-)) modes, along with theory have led to improved estimates of the CP violating (indirect and direct) and CP conserving contributions to the K-L(o) modes. The KTeV fixed-target experiment at Fermilab has conducted searches for the K-L(o) --> pi(o)l (l) over bar modes; current status of these upper limits along with the present status of the predicted branching ratios will be presented. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Whitmore, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM jaws@fnal.gov NR 14 TC 0 Z9 0 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 2005 VL 142 BP 62 EP 67 DI 10.1016/j.nuclphysbps.2005.01.012 PG 6 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000016 ER PT J AU Quigg, C AF Quigg, C TI The lost tribes of charmonium SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID B-MESON DECAYS; STATE; X(3872) AB To illustrate the campaign to extend our knowledge of the charmonium spectrum, I focus on a puzzling new state, X(3872) --> pi(+)pi(-) J/psi. Studying the influence of open-charm channels on charmonium properties leads us to propose a new charmonium spectroscopy: additional discrete charmonium levels that can be discovered as narrow resonances of charmed and anticharmed mesons. I call attention to open issues for theory and experiment. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM quigg@fnal.gov OI Quigg, Chris/0000-0002-2728-2445 NR 49 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 87 EP 97 DI 10.1016/j.nuclphysbps.2005.01.016 PG 11 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000020 ER PT J AU Suprun, DA AF Suprun, DA TI Phenomenology of charmless hadronic B decays SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID MESON DECAYS AB The decays of B mesons to a pair of charmless pseudoscalar mesons (PP decays) or to a vector and pseudoscalar meson (VP decays) have been analyzed within the framework of flavor SU(3) symmetry and the Kobayashi-Maskawa mechanism of CP violation. Separate PP and VP fits proved to be successful in describing the experimental data (branching ratios, CP asymmetries and time-dependent parameters). Decay magnitudes and relative weak and strong phases have been extracted from the fits. Values of the weak phase gamma were found to be consistent with the current indirect bounds from other analyses of CKM parameters. C1 Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Chicago, Dept Phys, Chicago, IL 60637 USA. Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA. RP Suprun, DA (reprint author), Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA. NR 24 TC 0 Z9 0 U1 0 U2 1 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 2005 VL 142 BP 159 EP 162 DI 10.1016/j.nuclphysbps.2005.01.035 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000032 ER PT J AU Miquel, R AF Miquel, R CA CDF Collaboration TI Measurement of the moments of the hadronic invariant mass distribution in semileptonic B decays SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID SPECTRAL MOMENTS; MESON DECAYS AB Using 180 pb(-1) of data collected with the CDF II detector in Run II of the Tevatron, we measure the first two moments of the invariant mass-squared distribution of the charm-hadron system in semileptonic B decays. We measure directly the first two moments of the D-** component for a minimum lepton momentum in the B rest frame of 0.7 GeV/c to be (m(D**)(2)) = (5.83 +/- 0.16(stat) +/- 0.08(syst)) GeV12 <(m(D**)(2) - < m(D**)(2)>)(2)> = (1.30 +/- 0.69(stat) 0.20(syst)) GeV4. After combining them with the known contributions from D and D-* we find for the moments of the charm-hadron system < M-Xc(2)> - m((D) over bar)(2) = (0.459 0.037(stat) 0.065(syst)) GeV2, <(M-Xc(2) - < M-Xc(2)))(2)> = (1.04 +/- 0.25(stat) +/- 0.12(syst)) GeV4, where m((D) over bar) is the spin-averaged D mass and the systematic error is dominated by the uncertainty in the branching ratios used in the combination of the D, D-* and D-** pieces. From the moments we determine the non-perturbative HQET parameters lambda and lambda(1) in the pole and 1S mass schemes. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Miquel, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. OI Miquel, Ramon/0000-0002-6610-4836 NR 12 TC 0 Z9 0 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 2005 VL 142 BP 205 EP 208 DI 10.1016/j.nuclphysbps.2005.01.037 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000041 ER PT J AU Eichten, E AF Eichten, E TI New developments in heavy-light systems SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID QUARK SYMMETRY; MODEL AB The study of the narrow excited states in the (c (s) over bar) heavy-light system provides new insight into QCD dynamics. These effects involve the light quarks and are unaccounted for in relativistic potential models. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Eichten, E (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 25 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 242 EP 246 DI 10.1016/j.nuclphysbps.2005.01.044 PG 5 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000048 ER PT J AU D'Auria, S AF D'Auria, S CA CDF collaboration TI CP violation and CKM measurements in bottom and charm decays at CDF SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB We present preliminary measurements of branching ratios and CP asymmetries in 5 charmless decay modes of the B mesons and precise measurement of direct CP asymmetry in Cabibbo-suppressed charm decays. We used 180pb(-1) of the hadronic-b data stream of CDF's Tevatron Run2. The decay mode B-s --> phi phi has been observed for the first time, with a branching fraction of (1.44 +/- 0.6 +/- 0.2 +/- 0.5) x 10(-5). We also present the first measurement of the branching fraction B(B-s --> K+K-) = (3.56 +/- 0.57 +/- 0.50 +/- 0.43) x 10(-5). C1 Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland. RP Fermilab Natl Accelerator Lab, Mail Stop 318,POB 500, Batavia, IL 60510 USA. EM dauria@fnal.gov NR 15 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 326 EP 332 DI 10.1016/j.nuclphysbps.2005.01.056 PG 7 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000060 ER PT J AU Armstrong, SR AF Armstrong, SR TI Pentaquark searches in electron-positron annihilations and two-photon collisions at LEP SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID POSITIVE-STRANGENESS; Z DECAYS; DETECTOR; PHOTOPRODUCTION; PERFORMANCE; RESONANCE; ALEPH; STATE; MASS; L3 AB Evidence for the production of exotic hadron states composed of five quarks (pentaquarks) has been searched for in data collected by the ALEPH, DELPHI, and L3 experiments at LEP. No significant signal is observed. Several 95% C.L. upper limits are set on the production rates of such particles. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Armstrong, SR (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 25 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 364 EP 369 DI 10.1016/j.nuclphysbps.2005.01.141 PG 6 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000064 ER PT J AU Litvintsev, DO AF Litvintsev, DO CA CDF Collaboration TI Pentaquark searches at CDF SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB Recently there has been revival of interest in exotic baryon spectroscopy triggered by experimental evidence for pentaquarks containing u, d, s and c-quarks. We report results of the searches for pentaquark states in decays to pK(s)(o), Xi(-)pi(+/-) and D*- p performed at CDF detector using 220 pb(-1) sample of pp interactions at root s of 1.96 TeV. No evidence for narrow resonances were found in either mode. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Litvintsev, DO (reprint author), Fermilab Natl Accelerator Lab, MS 318,POB 500, Batavia, IL 60510 USA. NR 10 TC 42 Z9 42 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 2005 VL 142 BP 374 EP 377 DI 10.1016/j.nuclphysbps.2005.01.062 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000066 ER PT J AU Fernandez, PAM AF Fernandez, PAM CA CDF Collaboration TI Top quark mass measurements at CDF SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB Recent measurements of the mass of the top quark (t) are presented using 162 pb(-1) of data of p (p) over bar collisions at root s = 1.96 TeV collected by the CDF detector at the Tevatron collider during Run II. The analyses focus on the semi-leptonic decay mode t (t) over bar --> (bl nu)((b) over barq (q) over bar) with one or two identified bottom quarks (b). The Template Method reconstructs the invariant mass of the top quark in each event. The Multivariate Template Method enhances this approach by adding information on the event topology. The Dynamical Likelihood Method discriminates between possible mass values using top quark decay observables and attempts to use the maximum amount of information on top quarks provided by the Standard Model. All three methods produce similar results. The Dynamical Likelihood Method yields a top quark mass of 177.8(-5.0)(+4.5) (stat) +/- 6.2 (sys) GeV/c(2). C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Fernandez, PAM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 12 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 408 EP 411 DI 10.1016/j.nuclphysbps.2005.01.068 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000072 ER PT J AU Merkel, P AF Merkel, P CA CDF Collaboration TI Top production and properties at CDF SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID QUARK AB Recent top physics results from CDFII at a center-of-mass energy of 1.96 TeV are presented. Besides measurements of the t (t) over bar production cross section in all three decay channels using a set of complementary experimental methods, we report measurements of top branching ratios as well as the W helicity and the search for single top production. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Merkel, P (reprint author), Fermilab Natl Accelerator Lab, POB 500,MS 318, Batavia, IL 60510 USA. EM petra@fnal.gov 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 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 412 EP 415 DI 10.1016/j.nuclphysbps.2005.01.069 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000073 ER PT J AU Nguyen, H AF Nguyen, H TI Physics at an upgraded proton driver SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB A now 2 MW proton machine, known as the "proton driver", is being considered for Fermilab. It would play a key role in advancing accelerator-based neutrino physics. A workshop was organized in October 2004 at Fermilab to explore this physics case, as well as other physics that could be performed with this machine. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Nguyen, H (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM hogann@fnal.gov 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 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 434 EP 437 DI 10.1016/j.nuclphysbps.2005.01.074 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000078 ER PT J AU Kasper, P AF Kasper, P CA BTeV collaboration TI Status of BTeV SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol AB BTeV is a forward collider experiment at the Fermilab Tevatron dedicated to precision studies of CP violation, mixing and rare decays of beauty and charm hadrons. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Kasper, P (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM penny@fnal.gov NR 2 TC 0 Z9 0 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 2005 VL 142 BP 438 EP 441 DI 10.1016/j.nuclphysbps.2005.01.075 PG 4 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000079 ER PT J AU Meyer, H AF Meyer, H CA MIPP Collaboration TI Physics of the MIPP experiment SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT 6th International Conference on Hyperons, Charm and Beauty Hadrons CY JUN 27-JUL 03, 2004 CL Illinois Inst Technol, Chicago, IL HO Illinois Inst Technol ID ELECTRON-NUCLEUS SCATTERING AB The MIPP experiment, FNAL E907, uses a large acceptance spectrometer to measure particle production on hydrogen and nuclei using pi, K, and p beams of both charges and momenta from 5 to 100 GeV/c. We have charged particle identification for the whole of phase space using a combination of dE/dx, ToF, Cherenkov and RICH technologies. We aim to explore the dynamics of minimmn-bias interactions and test a scaling law of fragmentation with unprecedented precision and statistics. MIPP capabilities in light meson spectroscopy and nuclear physics and the impact of MIPP cross sections on neutrino experiments are examined. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Meyer, H (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM hmeyer@fnal.gov NR 7 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 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 453 EP 458 DI 10.1016/j.nuclphysbps.2005.01.078 PG 6 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000082 ER PT J AU Butler, JN AF Butler, JN TI Conference Summary: 6(th) International Conference on Hyperons, Charm, and Beauty Hadrons (BEACH04) SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Editorial Material ID FORM-FACTOR RATIOS; POSITIVE-STRANGENESS; 5-BODY DECAYS; BARYON STATE; RESONANCE; MESONS; MASS; PHOTOPRODUCTION; D-S(+) AB The 6(th) International Conference on Hyperons, Charm, and Beauty Hadrons (BEACH04) treated us to a wonderful array of new results. Here I attempt to summarize the talks and discuss the conference highlights. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Butler, JN (reprint author), Fermilab Natl Accelerator Lab, Wilson Hall,MS 122,POB 500, Batavia, IL 60510 USA. EM joel.butler@fnal.gov NR 101 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAY PY 2005 VL 142 BP 467 EP 495 DI 10.1016/j.nuclphysbps.2005.01.080 PG 29 WC Physics, Particles & Fields SC Physics GA 919OI UT WOS:000228627000084 ER PT J AU Dixon, BW Piet, SJ AF Dixon, BW Piet, SJ TI Spent fuel management options SO NUCLEAR PLANT JOURNAL LA English DT Article C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. RP Dixon, BW (reprint author), Idaho Natl Engn Lab, M-S 3750,POB 1625, Idaho Falls, ID 83415 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU EQES INC PI GLEN ELLYN PA 799 ROOSEVELT RD, BUILDING 6, STE 208, GLEN ELLYN, IL 60137-5925 USA SN 0892-2055 J9 NUCL PLANT J JI Nucl. Plant J. PD MAY-JUN PY 2005 VL 23 IS 3 BP 39 EP 41 PG 3 WC Energy & Fuels; Nuclear Science & Technology SC Energy & Fuels; Nuclear Science & Technology GA 984CT UT WOS:000233280800030 ER PT J AU Maekawa, F Meigo, S Kasugai, Y Takada, H Ino, T Sato, S Jerde, E Glasgow, D Niita, K Nakashima, H Oyama, Y Ikeda, Y Watanabe, N Hastings, J AF Maekawa, F Meigo, S Kasugai, Y Takada, H Ino, T Sato, S Jerde, E Glasgow, D Niita, K Nakashima, H Oyama, Y Ikeda, Y Watanabe, N Hastings, J CA ASTE Collaboration TI Analysis of a neutronic experiment on a simulated mercury spallation neutron target assembly bombarded by giga-electron-volt protons SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID ACTIVATION CROSS-SECTIONS; NUCLEAR-DATA; C-12 AB A neutronic benchmark experiment on a simulated spallation neutron target assembly was conducted by using the Alternating Gradient Synchrotron at Brookhaven National Laboratory and was analyzed to investigate the prediction capability of Monte Carlo simulation codes used in neutronic designs of spallation neutron sources. The target assembly consisting of a mercury target, a light water moderator, and a lead reflector was bombarded by 1.94-, 12-, and 24-GeV protons, and the fast neutron flux distributions around the target and the spectra of thermal neutrons leaking from the moderator were measured in the experiment. In this study, the Monte Carlo particle transport simulation codes NMTC/JAM, MCNPX, and MCNP-4A with associated cross-section data in JENDL and LA-150 were verified based on benchmark analysis of the experiment. As a result, all the calculations predicted the measured quantities adequately; calculated integral fluxes of fast and thermal neutrons agreed approximately within +/- 40% with the experiments although the overall energy range encompassed more than 12 orders of magnitude. Accordingly, it was concluded that these simulation codes and cross-section data were adequate for neutronics designs of spallation neutron sources. C1 Japan Atom Energy Res Inst, Ibaraki 3191195, Japan. High Energy Acclerator Res Org, Tsukuba, Ibaraki 3050801, Japan. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Res Org Informat Sci & Technol, Ibaraki 3191106, Japan. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Maekawa, F (reprint author), Japan Atom Energy Res Inst, Ibaraki 3191195, Japan. EM fujio@cens.tokai.jaeri.go.jp NR 21 TC 5 Z9 5 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD MAY PY 2005 VL 150 IS 1 BP 99 EP 108 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 920RW UT WOS:000228708800007 ER PT J AU Derrien, H Leal, LC Courcelle, A Santamarina, A AF Derrien, H Leal, LC Courcelle, A Santamarina, A TI Reevaluation and validation of the Pu-241 resonance parameters in the energy range thermal to 20 eV SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID CROSS-SECTIONS AB A new SAMMY analysis of the Pu-241 resonance parameters from thermal to 20 e V is presented This evaluation takes into account the trends given by integral experiments [post-irradiation experiments performed in French pressurized water reactors (PWRs)]. Compared to the previous evaluations performed by Derrien and de Saussure, the capture cross section increases especially in the 0.26-eV resonance. It is shown that the new resonance parameters proposed in this work improve the prediction of the Pu-242 buildup in a PWR, which was significantly underestimated with the previous evaluations. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. CEA, DEN Cadarache, F-13108 St Paul Les Durance, France. RP Derrien, H (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM amaud.courcelle@cea.fr NR 11 TC 6 Z9 6 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD MAY PY 2005 VL 150 IS 1 BP 109 EP 114 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 920RW UT WOS:000228708800008 ER PT J AU Reis, VH Crozat, MP Choi, JS Hill, R AF Reis, VH Crozat, MP Choi, JS Hill, R TI Nuclear fuel leasing, recycling, and proliferation: Modeling a global view SO NUCLEAR TECHNOLOGY LA English DT Article DE nuclear fuel cycle; fuel leasing; proliferation AB A system dynamics model was created to simulate fuel cycle interactions between two separate nuclear entities, and this model was employed to investigate fuel leasing arrangements. The model was also adapted to evaluate proliferation and economic implications of an international leasing regime. For a nuclear growth scenario, an open fuel cycle results in extensive spent-fuel accumulation. For a closed fuel cycle, the leasing fuel cycle shows potential to reduce proliferation concern, especially if coupled with improved security and safeguard technology. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Hicks & Associates Inc, Mclean, VA 22102 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Hill, R (reprint author), Argonne Natl Lab, 9700 S Cass Ave,Bldg 208, Argonne, IL 60439 USA. EM bobhill@anl.gov NR 5 TC 2 Z9 2 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD MAY PY 2005 VL 150 IS 2 BP 121 EP 131 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 919ZD UT WOS:000228655600001 ER PT J AU Stacey, WM Beavers, VL Casino, WA Cheatham, IR Friis, ZW Green, RD Hamilton, WR Haufler, KW Hutchinson, JD Lackey, WJ Lorio, RA Maddox, JW Mandrekas, J Manzoor, AA Noelke, CA De Oliveira, C Park, M Tedder, DW Terry, MR Hoffman, EA AF Stacey, WM Beavers, VL Casino, WA Cheatham, IR Friis, ZW Green, RD Hamilton, WR Haufler, KW Hutchinson, JD Lackey, WJ Lorio, RA Maddox, JW Mandrekas, J Manzoor, AA Noelke, CA De Oliveira, C Park, M Tedder, DW Terry, MR Hoffman, EA TI A subcritical, gas-cooled fast transmutation reactor with a fusion neutron source SO NUCLEAR TECHNOLOGY LA English DT Article DE transmutation reactor; fast reactor; fusion neutron source ID FUEL PERFORMANCE; OPERATION; SYSTEM AB A design is presented for a subcritical, He-cooled fast reactor, driven by a tokamak D-T fusion neutron source, for the transmutation of spent nuclear fuel (SNF). The reactor is fueled with coated transuranic (TRU) particles and is intended for the deep-burn (> 90%) transmutation of the TRUs in SNF without reprocessing of the coated fuel particles. The reactor design is based on the materials, fuel, and separations technologies under near-term development in the U.S. Department of Energy (DOE) Nuclear Energy Program and on the plasma physics and fusion technologies under near-term development in the DOE Fusion Energy Sciences Program, with the objective of intermediate-term (similar to 2040) deployment. The physical and performance characteristics and research and development requirements of such a reactor are described. C1 Georgia Inst Technol, Atlanta, GA 30332 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Stacey, WM (reprint author), Georgia Inst Technol, Atlanta, GA 30332 USA. EM weston.stacey@nre.gatech.edu RI Terry, Matthew/I-1056-2012 NR 37 TC 16 Z9 16 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD MAY PY 2005 VL 150 IS 2 BP 162 EP 188 PG 27 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 919ZD UT WOS:000228655600005 ER PT J AU Sakamoto, T Lamb, DQ Kawai, N Yoshida, A Graziani, C Fenimore, EE Donaghy, TQ Matsuoka, M Suzuki, M Ricker, G Atteia, JL Shirasaki, Y Tamagawa, T Torii, K Nakagawa, Y Galassi, M Doty, J Vanderspek, R Crew, GB Villasenor, J Butler, N Jernigan, JG Barraud, C Bore, M Dezalay, JP Olive, JF Hurley, K Woosley, SE Pizzichini, G AF Sakamoto, T Lamb, DQ Kawai, N Yoshida, A Graziani, C Fenimore, EE Donaghy, TQ Matsuoka, M Suzuki, M Ricker, G Atteia, JL Shirasaki, Y Tamagawa, T Torii, K Nakagawa, Y Galassi, M Doty, J Vanderspek, R Crew, GB Villasenor, J Butler, N Jernigan, JG Barraud, C Bore, M Dezalay, JP Olive, JF Hurley, K Woosley, SE Pizzichini, G CA HETE-2 Sci Team TI Global characteristics of X-ray flashes and X-ray rich GRBs observed by HETE-2 SO NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-GEOPHYSICS AND SPACE PHYSICS LA English DT Article; Proceedings Paper CT 4th Workshop on Gamma-Ray Bursts in the Afterglow Era CY OCT 18-22, 2004 CL Rome, ITALY ID CATALOG; BURSTS AB We describe and discuss the global properties of 45 gamma-ray bursts (CRBs) observed by HETE-2 during the first three years of its mission, forcing on the properties of X-Ray Flashes (XRFs) and X-ray-rich GRBs (XRRs). We find that: 1) the numbers of XRFs, XRRs, and CRBs are comparable, 2) the durations of XRFs and XRRs are similar to those of GRBs, and 3) the spectral properties of XRFs and XRRs are similar to those of GRBs, expect that the values of the peak energy E-peak of the burst spectrum is vF(v), the peak flux F, and the fluence S of XRFs are much smaller -and those of XRRs are smaller- than those of GRBs. These results provide strong evidence that all three kinds of bursts arise from the same phenomenon. C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Chicago, Chicago, IL 60637 USA. Tokyo Inst Technol, Meguro Ku, Tokyo 1528551, Japan. Aoyama Gakuin Univ, Setagaya Ku, Tokyo 1578572, Japan. Natl Astron Observ, Mitaka, Tokyo 1818588, Japan. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Osaka Univ, Toyonaka, Osaka 5600043, Japan. Japan Aerosp Explorat Agcy, JAXA, Tsukuba, Ibaraki 3058505, Japan. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Observ Midi Pyrenees, F-31400 Toulouse, France. CNRS, UPS, F-31028 Toulouse, France. MIT, Cambridge, MA 02139 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. IASF, INAF, Sez Bologna, I-40129 Bologna, Italy. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. RP Sakamoto, T (reprint author), NASA, Goddard Space Flight Ctr, Code 661, Greenbelt, MD 20771 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU SOCIETA ITALIANA DI FISICA PI BOLOGNA PA VIA SARAGOZZA, 12, I-40123 BOLOGNA, ITALY SN 1124-1896 J9 NUOVO CIMENTO C JI Nuovo Cimento Soc. Ital. Fis. C-Geophys. Space Phys. PD MAY-JUN PY 2005 VL 28 IS 3 BP 339 EP 342 PG 4 GA 989AT UT WOS:000233646000023 ER PT J AU Sato, R Sakamoto, T Kawai, N Yoshida, A Matsuoka, M Shirasaki, Y Tamagawa, T Suzuki, M Nakagawa, Y Ricker, GR Lamb, DQ Atteia, JL Graziani, C Vanderspek, R Crew, GB Villasenor, J Fenimore, EE AF Sato, R Sakamoto, T Kawai, N Yoshida, A Matsuoka, M Shirasaki, Y Tamagawa, T Suzuki, M Nakagawa, Y Ricker, GR Lamb, DQ Atteia, JL Graziani, C Vanderspek, R Crew, GB Villasenor, J Fenimore, EE CA HETE-2 Sci Team TI HETE-2 localization and observation of the gamma-ray burst GRB 020813 SO NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-GEOPHYSICS AND SPACE PHYSICS LA English DT Article; Proceedings Paper CT 4th Workshop on Gamma-Ray Bursts in the Afterglow Era CY OCT 18-22, 2004 CL Rome, ITALY AB A bright, long gamma-ray burst (GRB) was detected and localized by the instruments on board the High Energy Transient Explorer 2 satellite (HETEL-2) at 02:44:19.17 UTC (9859.17 s UT) on 2002 August 13. The location was to the GRB Coordinates Network (GCN) about 4 minutes after the burst allowing, early observations of a counterpart in the optical. In the prompt emission, the burst had a duration of approximately 125s, and more than four peaks. We analyzed the time-resolved energy spectrum of the prompt emission of GRB020813 using the Wide Field X-ray Monitor (WXM) and the French Gamma Telescope (FREGATE) in 2-400keV in detail. We find that the former part of the burst shows extremely hard X-ray spectrum. C1 Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 152, Japan. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RIKEN, Wako, Saitama 35101, Japan. Aoyama Gakuin Univ, Dept Phys, Sagamihara, Kanagawa, Japan. JAXA, Tsukuba, Ibaraki, Japan. Natl Astron Observ, Mitaka, Tokyo, Japan. Osaka Univ, Dept Phys, Toyonaka, Osaka 560, Japan. MIT, CSR, Cambridge, MA 02139 USA. Univ Chicago, Dept Astron, Chicago, IL 60637 USA. Observ Midi Pyrenees, Astrophys Lab, F-31400 Toulouse, France. Los Alamos Natl Lab, Los Alamos, NM USA. RP Sato, R (reprint author), Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 152, Japan. NR 6 TC 0 Z9 0 U1 0 U2 0 PU SOCIETA ITALIANA DI FISICA PI BOLOGNA PA VIA SARAGOZZA, 12, I-40123 BOLOGNA, ITALY SN 1124-1896 J9 NUOVO CIMENTO C JI Nuovo Cimento Soc. Ital. Fis. C-Geophys. Space Phys. PD MAY-JUN PY 2005 VL 28 IS 3 BP 343 EP 346 DI 10.1393/ncc/i2005-10056-x PG 4 GA 989AT UT WOS:000233646000024 ER PT J AU Knize, MG Felton, JS AF Knize, MG Felton, JS TI Formation and human risk of carcinogenic heterocyclic amines formed from natural precursors in meat SO NUTRITION REVIEWS LA English DT Review DE heterocyclic amine; PhIP; IFP; cooked meat; epidemiology ID BREAST-CANCER RISK; FRIED GROUND-BEEF; IN-PROCESS FLAVORS; DONE RED MEAT; AROMATIC-AMINES; WELL-DONE; COLORECTAL ADENOMAS; UNITED-STATES; COOKED MEAT; 2-AMINO-1-METHYL-6-PHENYLIMIDAZO<4,5-B>PYRIDINE PHIP AB A group of heterocyclic amines that are mutagens and rodent carcinogens form when meat is cooked to medium and well-done states. The precursors of these compounds are natural meat components: creatinine, amino acids, and sugars. Defined model systems of dry-heated precursors mimic the amounts and proportions of heterocyclic amines found in meat. Results from model systems and cooking experiments suggest ways to reduce their formation and, thus, reduce human intake. Human cancer epidemiology studies related to the consumption of well-done meat products are listed and compared in this review. © 2005 International Life Sciences Institute. C1 Lawrence Livermore Natl Lab, Biosci Directorate, Livermore, CA 94550 USA. RP Felton, JS (reprint author), Lawrence Livermore Natl Lab, Biosci Directorate, 7000 E Ave, Livermore, CA 94550 USA. EM felton1@llnl.gov FU NCI NIH HHS [CA55861] NR 94 TC 87 Z9 90 U1 3 U2 30 PU INT LIFE SCIENCES INST NORTH AMERICA PI WASHINGTON PA ONE THOMAS CIRCLE, N W, 9TH FLOOR, WASHINGTON, DC 20005 USA SN 0029-6643 J9 NUTR REV JI Nutr. Rev. PD MAY PY 2005 VL 63 IS 5 BP 158 EP 165 DI 10.1301/nr.2005.may.158-165 PG 8 WC Nutrition & Dietetics SC Nutrition & Dietetics GA 925MD UT WOS:000229056300002 PM 15971410 ER PT J AU Wu, JT Wein, LM Perelson, AS AF Wu, JT Wein, LM Perelson, AS TI Optimization of influenza vaccine selection SO OPERATIONS RESEARCH LA English DT Article ID EFFICACY; VIRUS; IMMUNIZATION; EVOLUTION; STRAIN AB The World Health Organization (WHO) recommends which strains of influenza to include in each year's vaccine to countries around the globe. The current WHO strategy attempts to match the vaccine strains with the expected upcoming epidemic strains, a strategy we refer to as the follow policy. The recently proposed antigenic distance hypothesis suggests that vaccine efficacy can be enhanced by taking into account the antigenic histories of vaccinees. To assess the potential benefit of history-based vaccination, we formulate the annual vaccine-strains selection problem as a stochastic dynamic program using the theory of shape space, which maps each vaccine and epidemic strain into a point in multidimensional space. Computational results show that a near-optimal policy can be derived by approximating the entire antigenic history by a single reduced historical strain, and then solving the multiperiod problem myopically, as a series of single-period problems. The modest suboptimality of the follow policy, together with our current inability to quantitatively link the model's objective function (a measure of cross-reactivity) with actual vaccine efficacy, leads us to recommend the continued use of the follow policy. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Georgia Inst Technol, Atlanta, GA 30332 USA. Stanford Univ, Grad Sch Business, Stanford, CA 94305 USA. RP Wu, JT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM joewu@isye.gatech.edu; lwein@stanford.edu; asp@lanl.gov NR 16 TC 19 Z9 19 U1 1 U2 12 PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES PI LINTHICUM HTS PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 USA SN 0030-364X J9 OPER RES JI Oper. Res. PD MAY-JUN PY 2005 VL 53 IS 3 BP 456 EP 476 DI 10.1287/opre.1040.0143 PG 21 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA 942ZK UT WOS:000230321200006 ER PT J AU Yang, P Guo, JP Burns, GR Luk, TS Luk, TS AF Yang, P Guo, JP Burns, GR Luk, TS Luk, TS TI Direct-write embedded waveguides and integrated optics in bulk glass by femtosecond laser pulses SO OPTICAL ENGINEERING LA English DT Article DE femtosecond phenomena; birefringence; integrated optics ID FUSED-SILICA; INDUCED BIREFRINGENCE; FABRICATION AB Embedded waveguides and integrated optical devices are fabricated from a computer-aided design file by scanning the focus spot in amorphous silica, using femtosecond laser pulses (800 nm, < 125 fs, at 1 kHz). The effect of laser processing conditions on the optical properties of direct-written waveguides and an unusual laser-induced birefringence in an optically isotropic glass are reported. Several integrated optical devices, including Y coupler, directional coupler, and Mach-Zehnder interferometer, are made to demonstrate the simplicity and flexibility of this technique in comparison to the conventional waveguide fabrication processes. (c) 2005 Society of Photo-Optical Instrumentation Engineers. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Yang, P (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 27 TC 1 Z9 1 U1 0 U2 1 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD MAY PY 2005 VL 44 IS 5 AR 051104 DI 10.1117/1.1915447 PG 6 WC Optics SC Optics GA 974KP UT WOS:000232590600010 ER PT J AU Jovanovic, I Brown, CG Ebbers, CA Barty, CPJ Forget, N Le Blanc, C AF Jovanovic, I Brown, CG Ebbers, CA Barty, CPJ Forget, N Le Blanc, C TI Generation of high-contrast millijoule pulses by optical parametric chirped-pulse amplification in periodically poled KTiOPO4 SO OPTICS LETTERS LA English DT Article ID AMPLIFIER AB A new high-contrast, high-gain optical parametric chirped-pulse amplifier (OPCPA) architecture is demonstrated in periodically poled KTiOPO4 (PPKTP). This architecture overcomes parametric fluorescence contrast limitations of the OPCPA in periodically poled materials. The scheme is based on two passes of a single relay-imaged pump pulse and a free-propagating signal pulse through a 1.5 mm X 5 mm X 7.5 mm PPKTP crystal. The output energy of 1.2 mJ is generated at a center wavelength of 1053 nm by 24 mJ of pump energy. A prepulse contrast level of > 3 X 10(7) was measured with > 10(6) saturated gain in the amplifier. Amplified pulses were compressed to 200 fs. This simple and versatile concept requires only a modest pump energy from a commercial pump laser and represents a possible high-contrast front end for high-energy Nd:glass-based petawatt-class lasers. (c) 2005 Optical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Ecole Polytech, Lab Utilisat Lasers Intenses, F-91128 Palaiseau, France. RP Jovanovic, I (reprint author), Lawrence Livermore Natl Lab, Mail Code L-470,7000 East Ave, Livermore, CA 94550 USA. EM jovanovic1@llnl.gov RI Forget, Nicolas/F-5488-2010 NR 10 TC 23 Z9 28 U1 1 U2 6 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 2005 VL 30 IS 9 BP 1036 EP 1038 DI 10.1364/OL.30.001036 PG 3 WC Optics SC Optics GA 918QL UT WOS:000228562600030 PM 15906995 ER PT J AU Jiang, S Zhang, XD AF Jiang, S Zhang, XD TI Token-ordered LRU: an effective page replacement policy and its implementation in Linux systems SO PERFORMANCE EVALUATION LA English DT Article DE process thrashing; global LRU replacement; load control; performance evaluation ID MODEL AB Most computer systems use a global page replacement policy based on the LRU principle to approximately select a Least Recently Used page for a replacement in the entire user memory space. During execution interactions, a memory page can be marked as LRU even when its program is conducting page faults. We define the LRU pages under such a condition as false LRU pages because these LRU pages are not produced by program memory reference delays, which is inconsistent with the LRU principle. False LRU pages can significantly increase page faults, even cause system thrashing. This poses a more serious risk in a large parallel systems with distributed memories because of the existence of coordination among processes running on individual node. In the case, the process thrashing in a single node or a small number of nodes could severely affect other nodes running coordinating processes, even crash the whole system. In this paper, we focus on how to improve the page replacement algorithm running on one node. After a careful study on characterizing the memory usage and the thrashing behaviors in the multi-programming system using LRU replacement. we propose an LRU replacement alternative, called token-ordered LRU, to eliminate or reduce the unnecessary page faults by effectively ordering and scheduling memory space allocations. Compared with traditional thrashing protection mechanisms such as load control, our policy allows more processes to keep running to support synchronous distributed process computing. We have implemented the token-ordered LRU algorithm in a Linux kernel to show its effectiveness. (c) 2004 Elsevier B.V. All rights reserved. C1 Coll William & Mary, Dept Comp Sci, Williamsburg, VA 23187 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Zhang, XD (reprint author), Coll William & Mary, Dept Comp Sci, Williamsburg, VA 23187 USA. EM sjiang@lanl.gov; zhang@cs.wm.edu NR 26 TC 3 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-5316 J9 PERFORM EVALUATION JI Perform. Eval. PD MAY PY 2005 VL 60 IS 1-4 BP 5 EP 29 DI 10.1016/j.peva.2004.10.002 PG 25 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods SC Computer Science GA 909JT UT WOS:000227856900002 ER PT J AU Smith, MC Peterson, GD AF Smith, MC Peterson, GD TI Parallel application performance on shared high performance reconfigurable computing resources SO PERFORMANCE EVALUATION LA English DT Article DE analytic performance modeling; reconfigurable computing (RC); high performance computing (HPC); performance evaluation ID NETWORK; MODELS AB The use of a network of shared, heterogeneous workstations each harboring a reconfigurable computing (RC) system offers high performance users an inexpensive platform for a wide range of computationally demanding problems. However, effectively using the full potential of these systems can be challenging without the knowledge of the system's performance characteristics. While some performance models exist for shared, heterogeneous workstations, none thus far account for the addition of RC systems. Our analytic performance model includes the effects of the reconfigurable device, application load imbalance, background user load, basic message passing communication, and processor heterogeneity. The methodology proves to be accurate in characterizing these effects for applications running on shared, homogeneous, and heterogeneous HPRC resources. The model error in all cases was found to be less than 5% for application runtimes greater than 30 s, and less than 15% for runtimes less than 30 s. (c) 2004 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. RP Smith, MC (reprint author), Oak Ridge Natl Lab, Bethel Valley Rd,MS 6006, Oak Ridge, TN 37831 USA. EM smithmc@oml.gov; gdp@utk.edu NR 24 TC 10 Z9 11 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-5316 J9 PERFORM EVALUATION JI Perform. Eval. PD MAY PY 2005 VL 60 IS 1-4 BP 107 EP 125 DI 10.1016/j.peva.2004.10.004 PG 19 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods SC Computer Science GA 909JT UT WOS:000227856900006 ER PT J AU Thanos, PK Katana, JM Ashby, CR Michaelides, M Gardner, EL Heidbreder, CA Volkow, ND AF Thanos, PK Katana, JM Ashby, CR Michaelides, M Gardner, EL Heidbreder, CA Volkow, ND TI The selective dopamine D3 receptor antagonist SB-277011-A attenuates ethanol consumption in ethanol preferring (P) and non-preferring (NP) rats SO PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR LA English DT Article DE alcoholism; addiction; dopamine; drinking ID D-3 RECEPTOR; D2 RECEPTORS; ALCOHOL-DRINKING; PLACE PREFERENCE; COCAINE-SEEKING; KNOCKOUT MICE; BEHAVIOR; BRAIN; DEPENDENCE; LIGANDS AB The mesolimbic dopamine (DA) system plays an important role in mediating addiction to alcohol and other drugs of abuse. Recent evidence points toward the role of the DA D3 receptor (D3R) in drug-induced reward, drug-taking, as well as cue-, drug-, and stress-triggered relapse to drug-seeking behavior. Accordingly, the present study examined the effects of acute selective antagonism of the D3R on ethanol consumption in alcohol Preferring (P) and Non-Preferring (NP) rats. We employed the two-bottle choice paradigm to monitor ethanol consumption in these rats before and after treatment with 3, 10, and 30 mg/kg (i.p.) of the selective D3R antagonist SB-277011-A. Results indicated a significant attenuation in ethanol preference, intake and lick responses in P rats treated with 10 and 30 mg/kg SB-277011-A. A similar, though not as robust effect was observed in ethanol consumption in the NP rats when treated with 30 mg/kg SB-277011-A. Finally, the acute administration of SB-277011-A did not produce extrapyramidal side effects, as indicated by stable lick response-volume ratios and lick response time distributions. These results further support the notion that the D3R is important in mediating the addictive properties of alcohol and suggest that selective blockade of the D3R may constitute a new and useful target for prospective pharmacotherapeutic approaches to alcoholism. (C) 2005 Elsevier Inc. All rights reserved. C1 Brookhaven Natl Lab, Dept Med, Behav Neuropharmacol Lab, Upton, NY 11973 USA. St Johns Univ, Coll Pharm & Allied Hlth Profess, Dept Pharmaceut Sci, Jamaica, NY 11439 USA. Natl Inst Drug Abuse, Intramural Res Program, NIH, Dept Hlth & Human Serv, Baltimore, MD 21224 USA. GlaxoSmithKline Pharmaceut, Psychiat Ctr Excellence Drug Discovery, I-37135 Verona, Italy. NIAAA, Lab Neuroimaging, NIH, Dept Hlth & Human Dev, Bethesda, MD 20892 USA. RP Thanos, PK (reprint author), Brookhaven Natl Lab, Dept Med, Behav Neuropharmacol Lab, Bldg 490, Upton, NY 11973 USA. EM thanos@bnl.gov RI Michaelides, Michael/K-4736-2013 OI Michaelides, Michael/0000-0003-0398-4917 FU NIAAA NIH HHS [AA 11034, AA07611, AA07574] NR 35 TC 57 Z9 58 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0091-3057 J9 PHARMACOL BIOCHEM BE JI Pharmacol. Biochem. Behav. PD MAY PY 2005 VL 81 IS 1 BP 190 EP 197 DI 10.1016/j.pbb.2005.03.013 PG 8 WC Behavioral Sciences; Neurosciences; Pharmacology & Pharmacy SC Behavioral Sciences; Neurosciences & Neurology; Pharmacology & Pharmacy GA 932BU UT WOS:000229530000024 PM 15894078 ER PT J AU Beyerlein, IJ Li, S Necker, CT Alexander, DJ Tome, CN AF Beyerlein, IJ Li, S Necker, CT Alexander, DJ Tome, CN TI Non-uniform microstructure and texture evolution during equal channel angular extrusion SO PHILOSOPHICAL MAGAZINE LA English DT Article ID SEVERE PLASTIC-DEFORMATION; STRAIN-RATE; BEHAVIOR; SIMULATION; ECAE; FLOW AB Intense plastic deformation during equal-channel angular extrusion (ECAE) can occur in a broad region at the channel die intersection called the plastic deformation zone (PDZ). When the outer corner of the ECAE die is rounded, PDZs deviate from the model of single-plane simple shear, causing flow to be inhomogeneous. In this work, we explore the validity of using an analytical description of the PDZ by comparing model predictions against finite element (FE) simulations using various material and friction conditions and orientation imaging microscopy (OIM) measurements on ECAE one-pass copper. Inhomogeneous deformation divided the sample into two distinct regions across the sample thickness, wherein the accumulated strain, velocity gradient, texture evolution, and microstructural features are distinct. We demonstrate that intense deformation in the upper part is described well by sequences of simple shearing in a central fan and deformation in the lower part by a combination of low- intensity shear and rigid body rotation. Texture predictions by FE provided the same result as the PDZ model and OIM for the upper part, regardless of the friction and strain hardening variables considered. However, texture results for the lower part were sensitive to choices of friction and strain hardening. Though an idealization, this analytical two-region PDZ model, once characterized, can lend insight and be computationally efficient for multi-pass predictions. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Beyerlein, IJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM irene@lanl.gov RI Li, Saiyi/J-3968-2012; Tome, Carlos/D-5058-2013; Beyerlein, Irene/A-4676-2011 NR 30 TC 44 Z9 45 U1 0 U2 4 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6435 J9 PHILOS MAG JI Philos. Mag. PD MAY 1 PY 2005 VL 85 IS 13 BP 1359 EP 1394 DI 10.1080/09500830500040940 PG 36 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 928EO UT WOS:000229254100002 ER PT J AU Al-Fadhalahy, K Tome, CN Beaudoin, AJ Robertson, IM Hirth, JP Misra, A AF Al-Fadhalahy, K Tome, CN Beaudoin, AJ Robertson, IM Hirth, JP Misra, A TI Modeling texture evolution during rolling of a Cu-Nb multilayered system SO PHILOSOPHICAL MAGAZINE LA English DT Article ID METALLIC MULTILAYERS; DEFORMATION; PLASTICITY; MECHANISMS; BEHAVIOR; MICROSTRUCTURES; POLYCRYSTALS; COMPOSITES; INTERFACES; STRENGTH AB A polycrystal plasticity model is proposed to predict the unique rolling texture of Cu/Nb nanostructured multilayers. At this length scale, the model accounts for the interface between Cu and Nb layers by computing the aggregate response of composite grains using a viscoplastic self-consistent scheme. Each composite grain is divided into Cu and Nb crystals with the interface parallel to the rolling plane, and compatibility and equilibrium are enforced across the interface. A latent hardening effect is introduced to account for the interaction between glide and interface dislocations. The latter are accumulated during slip transmission. This unconventional hardening confines the movement of glide dislocations by promoting symmetry of slip activities. Consequently, it slows development of the rolling texture for Cu/Nb nanolayers, and partially preserves the initial interface orientation defined by the Kurdjumov-Sachs relationship. C1 Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA. Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA. RP Tome, CN (reprint author), Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA. EM tome@lanl.gov RI Misra, Amit/H-1087-2012; Tome, Carlos/D-5058-2013 NR 29 TC 29 Z9 29 U1 0 U2 14 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6435 J9 PHILOS MAG JI Philos. Mag. PD MAY 1 PY 2005 VL 85 IS 13 BP 1419 EP 1440 DI 10.1080/14786430412331333338 PG 22 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 928EO UT WOS:000229254100004 ER PT J AU Field, RD Brown, DW Thoma, DJ AF Field, RD Brown, DW Thoma, DJ TI Texture development and deformation mechanisms during uniaxial straining of U-Nb shape-memory alloys SO PHILOSOPHICAL MAGAZINE LA English DT Article ID MULTIVARIANT MICROMECHANICAL MODEL; URANIUM-NIOBIUM ALLOYS; METASTABLE PHASES; DIFFRACTION; MARTENSITE; SYSTEM; GAMMA AB The shape-memory effect is well documented in uranium-niobium alloys near the alpha''-gamma degrees metastable phase boundary. In situ neutron diffraction measurements during uniaxial loading indicate that U-14 at.% Nb ( in the alpha'' monoclinic phase field) deforms by stress-induced twin reorientation. Alternatively, U-16 at.% Nb ( initially gamma degrees tetragonal) undergoes a stress-induced phase transformation to the alpha'' monoclinic phase. The crystallographic texture of the monoclinic phase of both compositions has been measured and qualitatively interpreted by considering the orientation relationship between the most favoured alpha'' variant and the parent phase. In addition, previously published observations of deformation structures within the shape-memory regime of a U-13 at.% Nb alloy are discussed within the context of the same model. C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Field, RD (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, Mail Stop G770, Los Alamos, NM 87545 USA. EM rdfield@lanl.gov NR 27 TC 11 Z9 12 U1 1 U2 11 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6435 J9 PHILOS MAG JI Philos. Mag. PD MAY 1 PY 2005 VL 85 IS 13 BP 1441 EP 1457 DI 10.1080/14786430500036314 PG 17 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 928EO UT WOS:000229254100005 ER PT J AU Xu, Y Goyal, A Leonard, K Martin, P AF Xu, Y Goyal, A Leonard, K Martin, P TI High performance YBCO films by the hybrid of non-fluorine yttrium and copper salts with Ba-TFA SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article DE YBCO; RABiTS; MOD; TFA; film; TMAP; HTS ID METALORGANIC DEPOSITION; THICK-FILMS AB High performance YBCO films have been fabricated using a metallorganic deposition (MOD) approach consisting of a hybrid of Ba-trifluoroacetate (Ba-TFA) with non-fluorine containing Cu and Y solution precursors on rolling-assisted-biaxially-textured substrates (RABiTS). A high J(c) of 2.4 MA/cm(2) at 77 K for 0.6 mu m YBCO films on RABiTS corresponding to an I-c over 140 A/cm-w was obtained. T-c measurements showed sharp transitions with zero resistance above 90 K. Extrapolation of the normal state resistivity results in an intercept below zero at 0 K, indicating the absence of second phases at grain boundaries. This first report on obtaining high J(c) with significantly reduced fluorine in the precursor is important for scale-up to manufacturing since the volume of corrosive hydrofluoric gas (HF), which is a by-product of the conversion, is greatly reduced. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Xu, Y (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM yxu@ues.com NR 16 TC 26 Z9 28 U1 2 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 EI 1873-2143 J9 PHYSICA C JI Physica C PD MAY 1 PY 2005 VL 421 IS 1-4 BP 67 EP 72 DI 10.1016/j.physc.2005.03.001 PG 6 WC Physics, Applied SC Physics GA 929KW UT WOS:000229346000009 ER PT J AU Ovchinnikov, SY Macek, JH AF Ovchinnikov, SY Macek, JH TI Protonium formation in antiproton-hydrogen-atom collisions SO PHYSICAL REVIEW A LA English DT Article ID CAPTURE; IONIZATION; MOLECULES; STATES; IONS; H-2 AB Expressions for momentum distributions of electrons in antiproton-hydrogen-atom collisions are derived in the framework of the advanced adiabatic approach for the time- independent Schrodinger equation. Protonium formation cross sections for states with different n and l spherical quantum numbers are also obtained. Total ionization and protonium formation cross sections are compared with other calculations in the interval of impact energies from 0.5 eV to 10 keV. We show that diabatic states promoted into the continuum can be rigorously defined within the advanced adiabatic framework. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. RP Ovchinnikov, SY (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. EM serge@charcoal.phys.utk.edu RI Ovchinnikov, Serguei/C-4994-2014 NR 22 TC 11 Z9 11 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 2005 VL 71 IS 5 AR 052717 DI 10.1103/PhysRevA.71.052717 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 932HA UT WOS:000229543600073 ER PT J AU Sorokin, PP Glownia, JH Hodgson, RT AF Sorokin, PP Glownia, JH Hodgson, RT TI Discharge-pumped cw gas lasers utilizing "dressed-atom" gain media SO PHYSICAL REVIEW A LA English DT Article ID ELECTROMAGNETICALLY INDUCED TRANSPARENCY; DRIVEN 3-LEVEL SYSTEM; ABSORPTION PROPERTIES; SPONTANEOUS EMISSION; LAMBDA AB The possibility of realizing an efficient gaseous laser-beam-generating medium that utilizes &ULambda;-type coherently phased (i.e., "dressed") atoms for the active laser species, but that does not inherently require the use of external laser beams for pumping, is explored. Specifically, it is investigated if multiphoton stimulated hyper-Raman scattering (SHRS) processes driven by fluorescence radiation generated in a continuous electrical discharge present within the vapor-containing cell could produce continuous-wave (cw) optical gain at the &ULambda;-atom resonance frequencies ω(o) and ω(')(o). It is deduced that such gain could result from n-photon (n&GE; 4) SHRS processes only if absorption of fluorescence pump light occurs in the first three transitions of the n-photon sequence representing the process unit step. Estimates of the amount of optical gain that could be produced in such a system indicate that it should be sufficient to allow multiwatt cw laser operation to occur on one set of &ULambda; transitions connecting levels in a "double-&ULambda;" structure, with the pump light being discharge-produced fluorescence centered about the transitions of the other &ULambda; pair. However, to initiate operation of such a device would require injection into the laser optical cavity of intense "starter" laser pulses at both lasing frequencies. What should be an optimal experimental configuration for determining feasibility of the proposed laser device is described. In the suggested configuration, Cs-atom 6S(1/2)-6P(1/2) transitions form the double-&ULambda; structure. C1 IBM Corp, Div Res, Yorktown Hts, NY 10598 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Sorokin, PP (reprint author), IBM Corp, Div Res, Yorktown Hts, NY 10598 USA. NR 16 TC 0 Z9 0 U1 1 U2 1 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 2005 VL 71 IS 5 AR 053807 DI 10.1103/PhysRevA.71.053807 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 932HA UT WOS:000229543600111 ER PT J AU Trevisan, CS Houfek, K Zhang, Z Orel, AE McCurdy, CW Rescigno, TN AF Trevisan, CS Houfek, K Zhang, Z Orel, AE McCurdy, CW Rescigno, TN TI Nonlocal model of dissociative electron attachment and vibrational excitation of NO SO PHYSICAL REVIEW A LA English DT Article ID CROSS-SECTIONS; SCATTERING; COLLISIONS; CHANNELS; MOLECULE; IMPACT; STATES; F2 AB We present the results of a study of elastic scattering and vibrational excitation of NO by electron impact in the low-energy (0-2 eV) region where the cross sections are dominated by resonance contributions. The (3)&USigma;(-), (1)&UDelta;, and (1)&USigma;(+) NO- resonance lifetimes are taken from our earlier study [Phys. Rev. A 69, 062711 (2004)], but the resonance energies used here are obtained from different configuration-interaction studies. Here we employ a more elaborate nonlocal treatment of the nuclear dynamics, which is found to remedy the principal deficiencies of the local complex potential model we employed in our earlier study, and gives cross sections in better agreement with the most recent experiments. We also present cross sections for dissociative electron attachment to NO leading to ground-state products, O-(P-2)+N(S-4). The calculations show that, while the peak cross sections starting from NO in its ground vibrational state are very small (&SIM; 10(-20) cm(2)), the cross sections are extremely sensitive to vibrational excitation of the target and should be readily observable for target NO molecules excited to ν=10 and above. C1 Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. Charles Univ, Fac Math & Phys, Inst Theoret Phys, CR-18000 Prague, Czech Republic. RP Trevisan, CS (reprint author), Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. NR 35 TC 35 Z9 35 U1 1 U2 6 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 2005 VL 71 IS 5 AR 052714 DI 10.1103/PhysRevA.71.052714 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 932HA UT WOS:000229543600070 ER PT J AU Zurek, WH AF Zurek, WH TI Probabilities from entanglement, Born's rule p(k)=parallel to psi(k)parallel to(2) from envariance SO PHYSICAL REVIEW A LA English DT Article ID QUANTUM-MECHANICS; EVERETT INTERPRETATION; DECOHERENCE; EINSELECTION; COMPUTATION; WORLDS; STATES AB I show how probabilities arise in quantum physics by exploring the implications of environment-assisted invariance or envariance, a recently discovered symmetry exhibited by entangled quantum systems. Envariance of perfectly entangled "Bell-like" states can be used to rigorously justify complete ignorance of the observer about the outcome of any measurement on either of the members of the entangled pair. For more general states, envariance leads to Born's rule p(k)proportional to\psi(k)\(2) for the outcomes associated with Schmidt states. The probabilities derived in this manner are an objective reflection of the underlying state of the system-they represent experimentally verifiable symmetries, and not just a subjective "state of knowledge" of the observer. This envariance-based approach is compared with and found to be superior to prequantum definitions of probability including the standard definition based on the "principle of indifference" due to Laplace and the relative frequency approach advocated by von Mises. Implications of envariance for the interpretation of quantum theory go beyond the derivation of Born's rule: Envariance is enough to establish the dynamical independence of preferred branches of the evolving state vector of the composite system and, thus, to arrive at the environment-induced superselection (einselection) of pointer states, which was usually derived by an appeal to decoherence. The envariant origin of Born's rule for probabilities sheds light on the relation between ignorance (and, hence, information) and the nature of quantum states. C1 Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theory, MS B210, Los Alamos, NM 87545 USA. NR 72 TC 61 Z9 62 U1 3 U2 9 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 2005 VL 71 IS 5 AR 052105 DI 10.1103/PhysRevA.71.052105 PG 29 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 932HA UT WOS:000229543600011 ER PT J AU Antonov, VN Harmon, BN Bekenov, LV Shpak, AP Yaresko, AN AF Antonov, VN Harmon, BN Bekenov, LV Shpak, AP Yaresko, AN TI Electronic structure and x-ray magnetic circular dichroism in the Heusler alloy Co2NbSn SO PHYSICAL REVIEW B LA English DT Article ID DENSITY-FUNCTIONAL THEORY; ORBITAL POLARIZATION; PHASE-TRANSFORMATION; TRANSITION; NI2MNGA; FIELDS; SYSTEMS; METALS; ENERGY; LINES AB CO2NbSn undergoes a structural transition at T-s=233 K from the cubic Hensler Fm3m high -temperature phase into an orthorhombic low-temperature lattice of Pmma symmetry. Furthermore, the system exhibits a magnetic transition at T-c= 116 K from para to ferromagnetism. The electronic structure and x-ray magnetic circular dichroism (XMCD) spectra of the Hensler alloy Co2NbSn were investigated theoretically from first principles, using the fully relativistic Dirac LMTO band structure method for the crystal structures corresponding to both the high temperature and low temperature phases. The origin of the XMCD spectra in the compounds is examined. The effect of Ni substitution in the series (Co1-xNix)2NbSn on the electronic structure and magnetic ordering is also investigated. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Inst Met Phys, UA-252142 Kiev, Ukraine. Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany. Inst Met Phys, UA-03142 Kiev, Ukraine. RP Antonov, VN (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM antonov@imp.kiev.ua NR 38 TC 4 Z9 4 U1 1 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAY PY 2005 VL 71 IS 17 AR 174428 DI 10.1103/PhysRevB.71.174428 PG 10 WC Physics, Condensed Matter SC Physics GA 937OI UT WOS:000229935000076 ER PT J AU Bastea, M Bastea, S Emig, JA Springer, PT Reisman, DB AF Bastea, M Bastea, S Emig, JA Springer, PT Reisman, DB TI Kinetics of propagating phase transformation in compressed bismuth SO PHYSICAL REVIEW B LA English DT Article ID NUCLEATION; GROWTH AB We observed dynamically driven phase transitions in isentropically compressed bismuth. By changing the stress loading conditions we explored two distinct cases: one in which the experimental signature of the phase transformation corresponds to phase-boundary crossings initiated at both sample interfaces, and another in which the experimental trace is due to a single advancing transformation front in the bulk of the material. We introduce a coupled kinetics-hydrodynamics model that for this second case enables us, under suitable simplifying assumptions, to directly extract characteristic transition times from the experimental measurements. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bastea, M (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. EM bastea1@llnl.gov NR 31 TC 14 Z9 14 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 PY 2005 VL 71 IS 18 AR 180101 DI 10.1103/PhysRevB.71.180101 PG 4 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100001 ER PT J AU Beloborodov, IS Efetov, KB Lopatin, AV Vinokur, VM AF Beloborodov, IS Efetov, KB Lopatin, AV Vinokur, VM TI Effects of fluctuations and Coulomb interaction on the transition temperature of granular superconductors SO PHYSICAL REVIEW B LA English DT Article ID DISORDERED 2-DIMENSIONAL SUPERCONDUCTORS; TWO-DIMENSIONAL SUPERCONDUCTORS; UPPER CRITICAL-FIELD; FILMS; INSULATOR; LOCALIZATION; METALS AB We investigate the suppression of superconducting transition temperature in granular metallic systems due to (i) fluctuations of the order parameter (bosonic mechanism) and (ii) Coulomb repulsion (fermionic mechanism) assuming large tunneling conductance between the grains g(T)>> 1. We find the correction to the superconducting transition temperature for 3d granular samples and films. We demonstrate that if the critical temperature T-c>g(T)delta, where delta is the mean level spacing in a single grain, the bosonic mechanism is the dominant mechanism of the superconductivity suppression, while for critical temperatures T-cT-CDW, the observed correlated Debye temperature of theta(cD)(alpha-U)=199 +/- 3 K is in good agreement with other measurements of the Debye temperature for polycrystalline alpha-U. CDW structural models fit to the alpha-U EXAFS data support a squared CDW at the lowest temperatures, with a displacement amplitude of epsilon=0.05 +/- 0.02 angstrom. C1 Lawrence Livermore Natl Lab, Div Mat Sci & Technol, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Div Chem & Chem Engn, Livermore, CA 94551 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Nelson, EJ (reprint author), Lawrence Livermore Natl Lab, Div Mat Sci & Technol, POB 808, Livermore, CA 94551 USA. RI Booth, Corwin/A-7877-2008 NR 41 TC 8 Z9 8 U1 0 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAY PY 2005 VL 71 IS 18 AR 184113 DI 10.1103/PhysRevB.71.184113 PG 15 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100033 ER PT J AU Nussinov, Z Fradkin, E AF Nussinov, Z Fradkin, E TI Discrete sliding symmetries, dualities, and self-dualities of quantum orbital compass models and p+ip superconducting arrays SO PHYSICAL REVIEW B LA English DT Article ID TRANSITION-METAL COMPOUNDS; LIQUID-CRYSTAL PHASES; FIELD-THEORY; SYSTEMS; COMPLEXES; SMECTICS; MAGNETS; STATE; ORDER AB We study the spin-1/2 two- and three-dimensional orbital compass models relevant to the problem of orbital ordering in transition metal oxides. We show that these systems display self-dualities and gauge-like discrete sliding symmetries. An important and surprising consequence is that these models are dual to (seemingly unrelated) recently studied models of p+ip superconducting arrays. The duality transformations are constructed by means of a path-integral representation in discretized imaginary time and considering its Z(2) spatial reflection symmetries and space-time discrete rotations, we obtain, in a transparent unified geometrical way, several dualities. We also introduce an alternative construction of the duality transformations using operator identities. We discuss the consequences of these dualities for the order parameters and phase transitions of the orbital compass model and its generalizations, and apply these ideas to a number of related systems. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Washington Univ, Dept Phys, St Louis, MO 63160 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Nussinov, Z (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. RI Fradkin, Eduardo/B-5612-2013; OI Fradkin, Eduardo/0000-0001-6837-463X NR 44 TC 75 Z9 76 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 PY 2005 VL 71 IS 19 AR 195120 DI 10.1103/PhysRevB.71.195120 PG 9 WC Physics, Condensed Matter SC Physics GA 941WE UT WOS:000230244100049 ER PT J AU Sachdeva, R Istratov, AA Deenapanray, PNK Weber, ER AF Sachdeva, R Istratov, AA Deenapanray, PNK Weber, ER TI Photoluminescence band of Hf origin in hafnium-implanted silicon in the energy range 700 meV to 950 meV SO PHYSICAL REVIEW B LA English DT Article ID BEAM-SYNTHESIZED BETA-FESI2; SOLID-STATE DIFFUSION; MU-M LUMINESCENCE; AMORPHOUS INTERLAYERS; DOPANT DIFFUSION; THIN-FILMS; SI; CRYSTALLINE; GAAS; SEMICONDUCTORS AB A new photoluminescence (PC) band in the energy range of 700 to 950 meV associated with hafnium implanted in silicon is reported. A shift in the position of photoluminescence peaks observed on the samples implanted with two different isotopes of Hf confirms the Hf-related origin of the observed photoluminescence band. Activation of the Hf-optical centers requires a 1000 degrees C anneal step. The intensity of the PL lines depends on the cooling conditions. The spectrum consists of 5 peaks in the rapidly quenched sample as opposed to 21 in the slowly cooled sample. Temperature- and excitation power-dependent PL measurements were performed to identify their nature. The 943.8 meV line was associated with an exciton complex, while the 896.6 meV line originates from impurity bound exciton. The 896.6 meV emission line appears to be related to a Hf-related deep level defect at E-C-0.22 eV, the 845 meV line to a deep level defect at E-C-0.27 eV. The pressure measurements indicate that the 845 meV peak could be an internal transition. It is also found that oxygen coimplantation enhances the PL intensity in rapidly quenched samples. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Australian Natl Univ, Ctr Sustainable Energy Syst, Canberra, ACT 0200, Australia. RP Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. EM ravinder@berkeley.edu NR 40 TC 5 Z9 5 U1 1 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 PY 2005 VL 71 IS 19 AR 195208 DI 10.1103/PhysRevB.71.195208 PG 8 WC Physics, Condensed Matter SC Physics GA 941WE UT WOS:000230244100059 ER PT J AU Scrymgeour, DA Gopalan, V Itagi, A Saxena, A Swart, PJ AF Scrymgeour, DA Gopalan, V Itagi, A Saxena, A Swart, PJ TI Phenomenological theory of a single domain wall in uniaxial trigonal ferroelectrics: Lithium niobate and lithium tantalate SO PHYSICAL REVIEW B LA English DT Article ID ACOUSTICAL PHYSICAL CONSTANTS; POLARIZATION REVERSAL; INTERNAL FIELD; CRYSTALS; LITAO3; MICROSCOPY; NONSTOICHIOMETRY; LINBO3 AB A phenomenological treatment of domain walls based on the Ginzburg-Landau-Devonshire theory is developed for uniaxial trigonal ferroelectrics, lithium niobate and lithium tantalate. The contributions to the domain-wall energy from polarization and strain as a function of orientation are considered. Analytical expressions are developed that are analyzed numerically to determine the minimum polarization, strain, and energy configurations of domain walls. It is found that hexagonal y walls are preferred over x walls in both materials. This agrees well with experimental observation of domain geometries in stoichiometric composition crystals. C1 Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Scrymgeour, DA (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. EM amit.Itagi@seagate.com RI Scrymgeour, David/C-1981-2008 NR 29 TC 58 Z9 58 U1 0 U2 20 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 PY 2005 VL 71 IS 18 AR 184110 DI 10.1103/PhysRevB.71.184110 PG 13 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100030 ER PT J AU Speziale, S Jeanloz, R Milner, A Pasternak, MP Zaug, JM AF Speziale, S Jeanloz, R Milner, A Pasternak, MP Zaug, JM TI Vibrational spectroscopy of Fe(OH)(2) at high pressure: Behavior of the O-H bond SO PHYSICAL REVIEW B LA English DT Article ID RAMAN-SPECTRA; HYDROGEN; AMORPHIZATION; MG(OH)2; CA(OH)2; BRUCITE; COMPRESSION; TRANSITION; EQUATION; STATE AB Infrared and Raman spectra of Fe(OH)2, "white rust," were measured between 7 and 21 GPa at ambient temperature. The frequency of the infrared-active A(2u) and of the Raman-active A,g stretching modes of the O-H group decrease linearly with increasing pressure with slopes of -1.3 +/- 0.1 and -4.9 +/- 0.2 cm(-1)/GPa, respectively. The peak widths of both the infrared-active and Raman-active modes increase nonlinearly with pressure, with a discontinuous increase in broadening between 10 and 12.5 GPa. The overall broadening of the A(2u) and A(1g) stretching modes is approximately fourfold in the examined pressure range. The results of this spectroscopic study are compatible with the trends observed in recent neutron diffraction studies on the isostructural Co(OH)(2). Progressive pressure-induced H disordering could be a viable model to interpret both the broadening of the OH stretching mode and the changes in oxidation state of Fe recently observed by Mossbauer spectroscopy. C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Speziale, S (reprint author), Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. NR 20 TC 13 Z9 13 U1 1 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAY PY 2005 VL 71 IS 18 AR 184106 DI 10.1103/PhysRevB.71.184106 PG 5 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100026 ER PT J AU Urbano, RR Pagliuso, PG Rettori, C Schlottmann, P Sarrao, JL Bianchi, A Nakatsuji, S Fisk, Z Velazquez, E Oseroff, SB AF Urbano, RR Pagliuso, PG Rettori, C Schlottmann, P Sarrao, JL Bianchi, A Nakatsuji, S Fisk, Z Velazquez, E Oseroff, SB TI Gradual transition from insulator to semimetal of Ca1-xEuxB6 with increasing Eu concentration SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-SPIN-RESONANCE; EXCHANGE INTERACTION; PARAMAGNETIC-RESONANCE; MAGNETIC-PROPERTIES; FERROMAGNETIC EUB6; SINGLE-CRYSTALS; FERMI-SURFACE; DOPED SRB6; TRANSPORT; METALS AB The local environment of Eu2+ (4f(7),S=7/2) in Ca1-xEuxB6 ((.003 <= x <= 1.00) is investigated by means of electron spin resonance (ESR). For x less than or similar to 0.003 the spectra show resolved fine and hyperfine structures due to the cubic crystal electric field and nuclear hyperfine field, respectively. The resonances have Lorentzian line shape, indicating an insulating environment for the Eu2+ ions. For 0.013 less than or similar to x less than or similar to 0.07, as x increases, the ESR lines broaden due to local distortions caused by the Eu/Ca ions substitution. For 0.07 less than or similar to x less than or similar to 0.30, the lines broaden further and the spectra gradually change from Lorentzian to Dysonian resonances, suggesting a coexistence of both insulating and metallic environments for the Eu2+ ions. In contrast to Ca1-xGdxB6, the fine structure is still observable up to x approximate to 0.15. For x greater than or similar to 0.30 the fine and hyperfine structures are no longer observed, the line width increases, and the line shape is purely Dysonian, anticipating the semimetallic character of EuB6. This broadening is attributed to a spin-flip scattering relaxation process due to the exchange interaction between conduction and Eu2+ 4f electrons. High-field ESR measurements for x greater than or similar to 0. 5 reveal smaller and anisotropic linewidths, which are attributed to magnetic polarons and Fermi surface effects, respectively. C1 Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. San Diego State Univ, San Diego, CA 92182 USA. RP Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Urbano, Ricardo/F-5017-2012; Schlottmann, Pedro/G-1579-2013; Bianchi, Andrea/E-9779-2010; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; Bianchi, Andrea/0000-0001-9340-6971; NR 53 TC 12 Z9 12 U1 0 U2 6 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 PY 2005 VL 71 IS 18 AR 184422 DI 10.1103/PhysRevB.71.184422 PG 9 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100078 ER PT J AU Vakhnenko, OO Vakhnenko, VO Shankland, TJ AF Vakhnenko, OO Vakhnenko, VO Shankland, TJ TI Soft-ratchet modeling of end-point memory in the nonlinear resonant response of sedimentary rocks SO PHYSICAL REVIEW B LA English DT Article ID WATER SATURATION; BEREA SANDSTONE; EARTH MATERIALS; ELASTIC-MODULI; SLOW DYNAMICS; ATTENUATION; HYSTERESIS; VOLATILES; MECHANISM; VELOCITY AB We developed and thoroughly examined a model of longitudinal vibrational resonance in bar-shaped sedimentary rocks; these materials exhibit memory that originates from an essential asymmetry in processes of rupture and recovery of intergrain and interiamina cohesive bonds. The theory relies on an appropriate isolation and an adequate formalization of two mutually dependent subsystems, namely, a subsystem of ruptured bonds and a subsystem of internal longitudinal displacements. The subsystem of ruptured bonds is shown to be of a soft-ratchet type, so that its response to an alternating internal stress is characterized by broken symmetry and appears as nonzero long-term temporal and spatial changes in the concentration of ruptured bonds. The internal stress is generated by an alternating external drive acting both directly through the subsystem of longitudinal displacements and indirectly through temporal and spatial modifications of Young's modulus due to changes in concentration of ruptured bonds. The scheme reproduces the main experimental effects by using the simplest linear form of attenuation in an elastic subsystem and realistic assumptions about the stress-strain relation. In particular, it correctly describes: hysteretic behavior of a resonance curve on both its upward and downward slopes; linear softening of resonant frequency with increase of driving level; gradual (almost logarithmic) recovery (increase) of resonant frequency at low dynamical strains after the sample was conditioned by high strains; and temporal relaxation of response acceleration amplitude at fixed frequency. These are the most interesting observations typical of forced longitudinal oscillations of sandstone bars in the nonlinear regime. Further, we are able to trace how water saturation enhances the hysteresis and simultaneously decreases the quality factor because of an increase in equilibrium concentration of ruptured cohesive bonds. We also predict theoretically a dynamical effect analogous to the widely known quasistatic effect of hysteresis with discrete (end-point) memory. C1 Bogolyubov Inst Theoret Phys, Dept Nonlinear Phys Condensed Matter, UA-03143 Kiev, Ukraine. Inst Geophys, Dept Dynam Nonhomogeneous Media, UA-01054 Kiev, Ukraine. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Vakhnenko, OO (reprint author), Bogolyubov Inst Theoret Phys, Dept Nonlinear Phys Condensed Matter, 14-B Metrol St, UA-03143 Kiev, Ukraine. NR 40 TC 23 Z9 23 U1 1 U2 5 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 PY 2005 VL 71 IS 17 AR 174103 DI 10.1103/PhysRevB.71.174103 PG 14 WC Physics, Condensed Matter SC Physics GA 937OI UT WOS:000229935000023 ER PT J AU Velev, J Bandyopadhyay, A Butler, WH Sarker, S AF Velev, J Bandyopadhyay, A Butler, WH Sarker, S TI Electronic and magnetic structure of transition-metal-doped alpha-hematite SO PHYSICAL REVIEW B LA English DT Article ID INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; SEMICONDUCTOR; ALPHA-FE2O3; FE2O3; TIN AB We investigate the electronic and magnetic structure of transition-metal-doped a-hematite using the local density approximation with local correlations (LDA+U). The dopants in this study are the 3d transition metals Sc-Zn and Ga and are assumed to substitute on an Fe site. The calculated net moment per substitutional impurity is found to be vertical bar z(D)-z(Fe)vertical bar, opposite to that of the replaced Fe, where Z(D) and z(Fe) are the numbers of valence electrons of the dopant and Fe, respectively. The dopants, D, substitute in an effective charged state D3+ except for Ti4+ and Zn2+. In the case of Ti, the extra electron converts a neighboring Fe3+ atom to Fe2+. In the case of Zn, the missing electron generates a relatively diffuse hole at the top of the valence band spread over neighboring O atoms. C1 Univ Nebraska, Dept Phys, Lincoln, NE 68588 USA. Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA. Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA. Univ Alabama, Dept Phys, Tuscaloosa, AL 35487 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Butler, WH (reprint author), Univ Nebraska, Dept Phys, Lincoln, NE 68588 USA. NR 15 TC 50 Z9 50 U1 3 U2 36 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAY PY 2005 VL 71 IS 20 AR 205208 DI 10.1103/PhysRevB.71.205208 PG 7 WC Physics, Condensed Matter SC Physics GA 941WG UT WOS:000230244300041 ER PT J AU Yen, F dela Cruz, CR Lorenz, B Sun, YY Wang, YQ Gospodinov, MM Chu, CW AF Yen, F dela Cruz, CR Lorenz, B Sun, YY Wang, YQ Gospodinov, MM Chu, CW TI Low-temperature dielectric anomalies in HoMnO3: The complex phase diagram SO PHYSICAL REVIEW B LA English DT Article ID POWDER DIFFRACTION DATA; HEXAGONAL MANGANITES; MAGNETIC-STRUCTURE; RMNO3; EVOLUTION AB The dielectric constant of multiferroic hexagonal HoMnO3 exhibits an unprecedented diversity of anomalies at low temperatures (1.8 K < T< 10 K) and under external magnetic fields related to magnetic phase transitions in the coupled system of Ho moments, Mn spins, and ferroelectric polarization. The derived phase diagram is far more complex than previously assumed including, reentrant phases, phase transitions with distinct thermal and field hysteresis, as well as several multicritical points. Magnetoelastic interactions introduce lattice anomalies at the magnetic phase transitions. The reevaluation of the T-H phase diagram of HoMnO3 is demanded. C1 Univ Houston, TCSUH, Houston, TX 77204 USA. Univ Houston, Dept Phys, Houston, TX 77204 USA. Bulgarian Acad Sci, Inst Solid State Phys, BU-1784 Sofia, Bulgaria. 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, TCSUH, Houston, TX 77204 USA. RI dela Cruz, Clarina/C-2747-2013; Yen, Fei/C-8713-2015 OI dela Cruz, Clarina/0000-0003-4233-2145; Yen, Fei/0000-0003-2295-3040 NR 17 TC 49 Z9 50 U1 2 U2 13 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 PY 2005 VL 71 IS 18 AR 180407 DI 10.1103/PhysRevB.71.180407 PG 4 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100009 ER PT J AU Zhao, YS Zhang, JZ Pantea, C Qian, J Daemen, LL Rigg, PA Hixson, RS Gray, GT Yang, YP Wang, LP Wang, YB Uchida, T AF Zhao, YS Zhang, JZ Pantea, C Qian, J Daemen, LL Rigg, PA Hixson, RS Gray, GT Yang, YP Wang, LP Wang, YB Uchida, T TI Thermal equations of state of the alpha, beta, and omega phases of zirconium SO PHYSICAL REVIEW B LA English DT Article ID HIGH-PRESSURE; TEMPERATURE; TRANSITIONS; TITANIUM; SOLIDS; ZR AB We have conducted synchrotron x-ray diffraction studies on high purity zirconium metal at pressures (P) up to 17 GPa and temperatures (T) up to 973 K. Unit cell volumes (V) were derived from the refinements of x-ray diffraction data for the alpha, beta, and omega phases of zirconium and fitted to a Birch-Murnaghan equation of state with the pressure derivative of the bulk modulus, K-0', fixed at 4.0. The derived thermoelastic parameters for alpha zirconium are isothermal bulk modulus K-0=92(3) GPa, temperature derivative of bulk modulus (partial derivative K/partial derivative T)(P)=-2.3(8)x10(-2) GPa/K, volumetric thermal expansivity alpha(T)=a+bT with a=1.5(+/- 0.8)x10(-5) K-1 and b=1.7(+/- 1.4)x10(-8) K-2, and the pressure derivative of thermal expansion (partial derivative alpha/partial derivative P)(T)=-2.7(9)x10(-6) GPa(-1) K-1. For the beta phase we obtained an isothermal bulk modulus of K-T=66(3) GPa at 973 K and a unit-cell volume of V(973 K)=47.7(3) angstrom(3) at ambient pressure. For the omega zirconium we obtained K-0=90(5) GPa. Within the experimental errors, the K-0 values we determined for the alpha and omega phases and volumetric thermal expansion for the alpha phase are in agreement with previous experimental results, whereas all other thermoelastic parameters represent the first determinations for the three crystalline phases of zirconium metal. C1 Los Alamos Natl Lab, LANSCE Div, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, DX Div, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, MST Div, Los Alamos, NM 87545 USA. SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA. Argonne Natl Lab, APS, GESCARS, Argonne, IL 60439 USA. Univ Chicago, Chicago, IL 60637 USA. RP Zhao, YS (reprint author), Los Alamos Natl Lab, LANSCE Div, POB 1663, Los Alamos, NM 87545 USA. RI Pantea, Cristian/D-4108-2009; Lujan Center, LANL/G-4896-2012 NR 25 TC 57 Z9 57 U1 2 U2 21 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 PY 2005 VL 71 IS 18 AR 184119 DI 10.1103/PhysRevB.71.184119 PG 6 WC Physics, Condensed Matter SC Physics GA 940DO UT WOS:000230124100039 ER PT J AU Adler, SS Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Al-Jamel, A Alexander, J Amirikas, R Aoki, K Aphecetche, L Armendariz, R Aronson, SH Averbeck, R Awes, TC Azmoun, R Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bauer, F Bazilevsky, A Belikov, S Berdnikov, Y Bhagavatula, S Bjorndal, MT Boissevain, JG Borel, H Borenstein, S Brooks, ML Brown, DS Bruner, N Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Camard, X Chai, JS Chand, P Chang, WC Chernichenko, S Chi, CY Chiba, J Chiu, M Choi, IJ Choi, J Choudhury, RK Chujo, T Cianciolo, V Cobigo, Y Cole, BA Comets, MP Constantin, P Csanad, M Csorgo, T Cussonneau, JP d'Enterria, D Das, K David, G Deak, F Delagrange, H Denisov, A Deshpande, A Desmond, EJ Devismes, A Dietzsch, O Drachenberg, JL Drapier, O Drees, A Drees, KA du Rietz, R Durum, A Dutta, D Dzhordzhadze, V Efremenko, YV Chenawi, KE Enokizono, A En'yo, H Espagnon, B Esumi, S Ewell, L Fields, DE Finck, C Fleuret, F Fokin, SL Fox, BD Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fukao, Y Fung, SY Gadrat, S Garpman, S Germain, M Ghosh, TK Glenn, A Gogiberidze, G Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Guryn, W Gustafsson, HA Hachiya, T Haggerty, JS Hamagaki, H Hansen, AG Hartouni, EP Harvey, M Hasuko, K Hayano, R Hayashi, N He, X Heffner, M Hemmick, TK Heuser, JM Hibino, M Hidas, P Hiejima, H Hill, JC Hobbs, R Holzmann, W Homma, K Hong, B Hoover, A Horaguchi, T Ichihara, T Ikonnikov, VV Imai, K Inaba, M Inuzuka, M Isenhower, D Isenhower, L Ishihara, M Issah, M Isupov, A Jacak, BV Jang, WY Jeong, Y Jia, J Jinnouchi, O Johnson, BM Johnson, SC Joo, KS Jouan, D Kajihara, F Kametani, S Kamihara, N Kaneta, M Kang, JH Kapoor, SS Katou, K Kawabata, T Kazantsev, A Kelly, S Khachaturov, B Khanzadeev, A Kikuchi, J Kim, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kinney, E Kinnison, WW Kiss, A Kistenev, E Kiyomichi, A Kiyoyama, K Klein-Boesing, C Kobayashi, H Kochenda, L Kochetkov, V Koehler, D Kohama, T Kohara, R Komkov, B Konno, M Kopytine, M Kotchetkov, D Kozlov, A Kroon, PJ Kuberg, CH Kunde, GJ Kurita, K Kuroki, Y Kweon, MJ Kwon, Y Kyle, GS Lacey, R Ladygin, V Lajoie, JG Bornec, YL Lebedev, A Leckey, S Lee, DM Lee, S Leitch, MJ Leite, MAL Li, XH Lim, H Litvinenko, A Liu, MX Liu, Y Maguire, CF Makdisi, YI Malakhov, A Manko, VI Mao, Y Martinez, G Marx, MD Masui, H Matathias, F Matsumoto, T McCain, MC McGaughey, PL Melnikov, E Messer, F Miake, Y Milan, J Miller, TE Milov, A Mioduszewski, S Mischke, RE Mishra, GC Mitchell, JT Mohanty, AK Morrison, DP Moss, JM Muhlbacher, F Mukhopadhyay, D Muniruzzaman, M Murata, J Nagamiya, S Nagle, JL Nakamura, T Nandi, BK Nara, M Newby, J Nilsson, P Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, H Okada, K Ono, M Onuchin, V Oskarsson, A Otterlund, I Oyama, K Ozawa, K Pal, D Palounek, APT Pantuev, V Pantuev, VS Papavassiliou, V Park, J Park, WJ Parmar, A Pate, SF Pei, H Peitzmann, T Penev, V Peng, JC Pereira, H Peresedov, V Pierson, A Pinkenburg, C Pisani, RP Plasil, F Purschke, ML Purwar, AK Qualls, J Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosendahl, S Rosnet, P Rykov, VL Ryu, SS Sadler, ME Saito, N Sakaguchi, T Sakai, M Sakai, S Samsonov, V Sanfratello, L Santo, R Sato, HD Sato, S Sawada, S Schutz, Y Semenov, V Seto, R Shaw, MR Shea, TK Shein, I Shibata, TA Shigaki, K Shiina, T Shimomura, M Sickles, A Silva, CL Silvermyr, D Sim, KS Simon-Gillo, J Singh, CP Singh, V Sivertz, M Soldatov, A Soltz, RA Sondheim, WE Sorensen, S Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Sullivan, JP Takagi, S Takagui, EM Taketani, A Tamai, M Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Taranenko, A Tarjan, P Tepe, JD Thomas, TL Togawa, M Tojo, J Torii, H Towell, RS Tram, VN Tserruya, I Tsuchimoto, Y Tsuruoka, H Tuli, SK Tydesjo, H Tyurin, N Uam, TJ Hecke, HW Velkovska, J Velkovsky, M Veszpremi, V Villatte, L Vinogradov, AA Volkov, MA Vznuzdaev, E Wang, XR Watanabe, Y White, SN Willis, N Wohn, FK Woody, CL Xie, W Yang, Y Yanovich, A Yokkaichi, S Young, GR Yushmanov, IE Zajc, WA Zhang, C Zhou, S Zhou, SJ Zimanyi, J Zolin, L Zong, X AF Adler, SS Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Al-Jamel, A Alexander, J Amirikas, R Aoki, K Aphecetche, L Armendariz, R Aronson, SH Averbeck, R Awes, TC Azmoun, R Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bauer, F Bazilevsky, A Belikov, S Berdnikov, Y Bhagavatula, S Bjorndal, MT Boissevain, JG Borel, H Borenstein, S Brooks, ML Brown, DS Bruner, N Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Camard, X Chai, JS Chand, P Chang, WC Chernichenko, S Chi, CY Chiba, J Chiu, M Choi, IJ Choi, J Choudhury, RK Chujo, T Cianciolo, V Cobigo, Y Cole, BA Comets, MP Constantin, P Csanad, M Csorgo, T Cussonneau, JP d'Enterria, D Das, K David, G Deak, F Delagrange, H Denisov, A Deshpande, A Desmond, EJ Devismes, A Dietzsch, O Drachenberg, JL Drapier, O Drees, A Drees, KA du Rietz, R Durum, A Dutta, D Dzhordzhadze, V Efremenko, YV Chenawi, KE Enokizono, A En'yo, H Espagnon, B Esumi, S Ewell, L Fields, DE Finck, C Fleuret, F Fokin, SL Fox, BD Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fukao, Y Fung, SY Gadrat, S Garpman, S Germain, M Ghosh, TK Glenn, A Gogiberidze, G Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Guryn, W Gustafsson, HA Hachiya, T Haggerty, JS Hamagaki, H Hansen, AG Hartouni, EP Harvey, M Hasuko, K Hayano, R Hayashi, N He, X Heffner, M Hemmick, TK Heuser, JM Hibino, M Hidas, P Hiejima, H Hill, JC Hobbs, R Holzmann, W Homma, K Hong, B Hoover, A Horaguchi, T Ichihara, T Ikonnikov, VV Imai, K Inaba, M Inuzuka, M Isenhower, D Isenhower, L Ishihara, M Issah, M Isupov, A Jacak, BV Jang, WY Jeong, Y Jia, J Jinnouchi, O Johnson, BM Johnson, SC Joo, KS Jouan, D Kajihara, F Kametani, S Kamihara, N Kaneta, M Kang, JH Kapoor, SS Katou, K Kawabata, T Kazantsev, A Kelly, S Khachaturov, B Khanzadeev, A Kikuchi, J Kim, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kinney, E Kinnison, WW Kiss, A Kistenev, E Kiyomichi, A Kiyoyama, K Klein-Boesing, C Kobayashi, H Kochenda, L Kochetkov, V Koehler, D Kohama, T Kohara, R Komkov, B Konno, M Kopytine, M Kotchetkov, D Kozlov, A Kroon, PJ Kuberg, CH Kunde, GJ Kurita, K Kuroki, Y Kweon, MJ Kwon, Y Kyle, GS Lacey, R Ladygin, V Lajoie, JG Bornec, YL Lebedev, A Leckey, S Lee, DM Lee, S Leitch, MJ Leite, MAL Li, XH Lim, H Litvinenko, A Liu, MX Liu, Y Maguire, CF Makdisi, YI Malakhov, A Manko, VI Mao, Y Martinez, G Marx, MD Masui, H Matathias, F Matsumoto, T McCain, MC McGaughey, PL Melnikov, E Messer, F Miake, Y Milan, J Miller, TE Milov, A Mioduszewski, S Mischke, RE Mishra, GC Mitchell, JT Mohanty, AK Morrison, DP Moss, JM Muhlbacher, F Mukhopadhyay, D Muniruzzaman, M Murata, J Nagamiya, S Nagle, JL Nakamura, T Nandi, BK Nara, M Newby, J Nilsson, P Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, H Okada, K Ono, M Onuchin, V Oskarsson, A Otterlund, I Oyama, K Ozawa, K Pal, D Palounek, APT Pantuev, V Pantuev, VS Papavassiliou, V Park, J Park, WJ Parmar, A Pate, SF Pei, H Peitzmann, T Penev, V Peng, JC Pereira, H Peresedov, V Pierson, A Pinkenburg, C Pisani, RP Plasil, F Purschke, ML Purwar, AK Qualls, J Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosendahl, S Rosnet, P Rykov, VL Ryu, SS Sadler, ME Saito, N Sakaguchi, T Sakai, M Sakai, S Samsonov, V Sanfratello, L Santo, R Sato, HD Sato, S Sawada, S Schutz, Y Semenov, V Seto, R Shaw, MR Shea, TK Shein, I Shibata, TA Shigaki, K Shiina, T Shimomura, M Sickles, A Silva, CL Silvermyr, D Sim, KS Simon-Gillo, J Singh, CP Singh, V Sivertz, M Soldatov, A Soltz, RA Sondheim, WE Sorensen, S Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Sullivan, JP Takagi, S Takagui, EM Taketani, A Tamai, M Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Taranenko, A Tarjan, P Tepe, JD Thomas, TL Togawa, M Tojo, J Torii, H Towell, RS Tram, VN Tserruya, I Tsuchimoto, Y Tsuruoka, H Tuli, SK Tydesjo, H Tyurin, N Uam, TJ Hecke, HW Velkovska, J Velkovsky, M Veszpremi, V Villatte, L Vinogradov, AA Volkov, MA Vznuzdaev, E Wang, XR Watanabe, Y White, SN Willis, N Wohn, FK Woody, CL Xie, W Yang, Y Yanovich, A Yokkaichi, S Young, GR Yushmanov, IE Zajc, WA Zhang, C Zhou, S Zhou, SJ Zimanyi, J Zolin, L Zong, X CA PHENIX Collaboration TI Jet structure of baryon excess in Au+Au collisions at root SNN=200 GeV SO PHYSICAL REVIEW C LA English DT Article ID PHENIX MEASUREMENT; FRAGMENTATION AB Two particle correlations between identified meson and baryon trigger particles with 2.5 J(pi) transitions linking them. C1 Australian Natl Univ, Fac Sci, Dept Phys, Canberra, ACT 0200, Australia. Australian Natl Univ, RSPhysSE, Dept Phys Nucl, Canberra, ACT 0200, Australia. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Baxter, AM (reprint author), Australian Natl Univ, Fac Sci, Dept Phys, Canberra, ACT 0200, Australia. EM a.baxter@anu.edu.au RI Dracoulis, George/A-8123-2008; Kibedi, Tibor/E-8282-2010; Carpenter, Michael/E-4287-2015 OI Kibedi, Tibor/0000-0002-9205-7500; Carpenter, Michael/0000-0002-3237-5734 NR 43 TC 8 Z9 8 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 2005 VL 71 IS 5 AR 054302 DI 10.1103/PhysRevC.71.054302 PG 11 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200015 ER PT J AU Blazkiewicz, A Oberacker, VE Umar, AS Stoitsov, M AF Blazkiewicz, A Oberacker, VE Umar, AS Stoitsov, M TI Coordinate space Hartree-Fock-Bogoliubov calculations for the zirconium isotope chain up to the two-neutron drip line SO PHYSICAL REVIEW C LA English DT Article ID SPLINE COLLOCATION METHOD; GROUND-STATE PROPERTIES; EVEN-EVEN NUCLEI AB We solve the Hartree-Fock-Bogoliubov (HFB) equations for deformed, axially symmetric even-even nuclei in coordinate space on a two-dimensional (2-D) lattice utilizing the basis-spline expansion method. Results are presented for the neutron-rich zirconium isotopes up to the two-neutron drip line. In particular, we calculate binding energies, two-neutron separation energies, normal and pairing densities, mean square radii, quadrupole moments, and pairing gaps. Very large prolate quadrupole deformations (beta(2)=0.42,0.43,0.470) are found for the Zr-102,Zr-104,Zr-112 isotopes, in agreement with recent experimental data. We compare 2-D basis-spline lattice results with the results from a 2-D HFB code that uses a transformed harmonic oscillator basis. C1 Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Dept Phys, Oak Ridge, TN 37831 USA. Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BG-1784 Sofia, Bulgaria. RP Blazkiewicz, A (reprint author), Vanderbilt Univ, Dept Phys & Astron, 221 Kirkland Hall, Nashville, TN 37235 USA. RI Umar, Ahmet/J-4125-2013 OI Umar, Ahmet/0000-0002-9267-5253 NR 25 TC 38 Z9 38 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 2005 VL 71 IS 5 AR 054321 DI 10.1103/PhysRevC.71.054321 PG 8 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200034 ER PT J AU Cleymans, J Kampfer, B Kaneta, M Wheaton, S Xu, N AF Cleymans, J Kampfer, B Kaneta, M Wheaton, S Xu, N TI Centrality dependence of thermal parameters deduced from hadron multiplicities in Au+Au collisions at root S-NN =130 GeV SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; TRANSVERSE-MOMENTUM SPECTRA; NUCLEUS-NUCLEUS COLLISIONS; CHEMICAL EQUILIBRATION; FREEZE-OUT; STRANGENESS SATURATION; ROOT-S(NN)=130 GEV; PARTICLE RATIOS; SPS; MODEL AB We analyze the centrality dependence of thermal parameters deduced from hadron multiplicities in Au+Au collisions at root s(NN) = 130 GeV. Although the chemical freeze-out temperature and chemical potentials are found to be roughly centrality independent, the strangeness saturation factor gamma(S) increases with participant number toward unity, supporting the assumption of equilibrium freeze-out conditions in central collisions. C1 Univ Cape Town, CERN, Res Ctr, Dept Phys, ZA-7701 Rondebosch, Cape Town, South Africa. Forschungszentrum Rossendorf EV, Inst Kern & Hadronenphys, D-01314 Dresden, Germany. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Cleymans, J (reprint author), Univ Cape Town, CERN, Res Ctr, Dept Phys, ZA-7701 Rondebosch, Cape Town, South Africa. NR 51 TC 74 Z9 74 U1 0 U2 2 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 2005 VL 71 IS 5 AR 054901 DI 10.1103/PhysRevC.71.054901 PG 10 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200050 ER PT J AU Duweke, C Emmerich, R Imig, A Ley, J Tenckhoff, G Schieck, HP Golak, J Witala, H Epelbaum, E Glockle, W Nogga, A AF Duweke, C Emmerich, R Imig, A Ley, J Tenckhoff, G Schieck, HP Golak, J Witala, H Epelbaum, E Glockle, W Nogga, A TI The reaction H-2(p,pp)n in three kinematical configurations at E-p=16 MeV SO PHYSICAL REVIEW C LA English DT Article ID EFFECTIVE-FIELD THEORY; ELASTIC ND SCATTERING; CROSS-SECTION; NUCLEAR-FORCES; DEUTERON BREAKUP; 3-NUCLEON FORCE; CHIRAL LAGRANGIANS; POLARIZED PROTONS; MOMENTUM-SPACE; LOW ENERGIES AB We measured the cross sections of the H-2(p,pp)n breakup reaction at E-p=16 MeV in three kinematical configurations: the np final-state interaction (FSI), the coplanar star (CST), and an intermediate-star (IST) geometry. The cross sections are compared with theoretical predictions based on the CD Bonn potential alone and combined with the updated 2 pi-exchange Tucson-Melbourne three-nucleon force (TM99'), calculated without inclusion of the Coulomb interaction. The resulting excellent agreement between data and pure CD Bonn predictions in the FSI testifies to the smallness of three-nucleon force (3NF) effects as well as the insignificance of the Coulomb force for this particular configuration and energy. The CST also agrees well whereas the IST results show small deviations between measurements and theory seen before in the pd breakup space-star geometries which point to possible Coulomb effects. An additional comparison with effective field theory (EFT) predictions (without 3NF) up to order (NLO)-L-3 shows excellent agreement in the FSI case and a rather similar agreement as for CD Bonn in the CST and IST situations. C1 Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany. Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland. Jefferson Lab, Div Theory, Newport News, VA 23606 USA. Ruhr Univ Bochum, Inst Theoret Phys, D-44780 Bochum, Germany. Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA. RP Schieck, HP (reprint author), Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany. RI Nogga, Andreas/A-3354-2008 OI Nogga, Andreas/0000-0003-2156-748X NR 43 TC 12 Z9 12 U1 0 U2 0 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 2005 VL 71 IS 5 AR 054003 DI 10.1103/PhysRevC.71.054003 PG 8 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200011 ER PT J AU Kharzeev, D Levin, E Nardi, M AF Kharzeev, D Levin, E Nardi, M TI Onset of classical QCD dynamics in relativistic heavy ion collisions SO PHYSICAL REVIEW C LA English DT Article ID ULTRARELATIVISTIC NUCLEAR COLLISIONS; CHARGED-PARTICLE MULTIPLICITY; GLUON DISTRIBUTION-FUNCTIONS; CENTRALITY DEPENDENCE; TRANSVERSE-MOMENTUM; AU COLLISIONS; SOFT POMERON; DENSITY QCD; SMALL-X; ENERGY AB The experimental results on hadron production obtained recently at RHIC offer a new prospective on the energy dependence of the nuclear collision dynamics. In particular, it is possible that parton saturation-the phenomenon likely providing initial conditions for the multiparticle production at RHIC energies-may have started to set in central heavy ion collisions already around the highest CERN SPS energy. We examine this scenario, and make predictions based on high density QCD for the forthcoming root s =22 GeV run at RHIC. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, HEP Dept, IL-69978 Tel Aviv, Israel. Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy. Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy. RP Kharzeev, D (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. OI Nardi, Marzia/0000-0003-1574-9869 NR 59 TC 115 Z9 115 U1 0 U2 0 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 2005 VL 71 IS 5 AR 054903 DI 10.1103/PhysRevC.71.054903 PG 4 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200052 ER PT J AU Matevosyan, HH Miller, GA Thomas, AW AF Matevosyan, HH Miller, GA Thomas, AW TI Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime SO PHYSICAL REVIEW C LA English DT Article ID PIONIC CORRECTIONS; CHIRAL-SYMMETRY; QUARK-MODEL; SCATTERING; FLAVOR; SPIN AB We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the light front cloudy bag model by letting its parameters be analytic functions of the quark mass. We then use the model to extend the lattice calculations to large values of Q(2) of interest to current and planned experiments. These functions are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in G(E)(Q(2))/G(M)(Q(2)) varies as a function of quark mass. C1 Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. RP Matevosyan, HH (reprint author), Louisiana State Univ, Dept Phys & Astron, 202 Nicholson Hall,Tower Dr, Baton Rouge, LA 70803 USA. RI Thomas, Anthony/G-4194-2012; OI Thomas, Anthony/0000-0003-0026-499X; Matevosyan, Hrayr/0000-0002-4074-7411 NR 39 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD MAY PY 2005 VL 71 IS 5 AR 055204 DI 10.1103/PhysRevC.71.055204 PG 11 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200060 ER PT J AU Nico, JS Dewey, MS Gilliam, DM Wietfeldt, FE Fei, X Snow, WM Greene, GL Pauwels, J Eykens, R Lamberty, A Gestel, JV Scott, RD AF Nico, JS Dewey, MS Gilliam, DM Wietfeldt, FE Fei, X Snow, WM Greene, GL Pauwels, J Eykens, R Lamberty, A Gestel, JV Scott, RD TI Measurement of the neutron lifetime by counting trapped protons in a cold neutron beam SO PHYSICAL REVIEW C LA English DT Article ID (LIF)-LI-6 REFERENCE DEPOSITS; INELASTICALLY SCATTERED NEUTRONS; STORING ULTRACOLD NEUTRONS; CHARGED-PARTICLE REACTIONS; BETA-DECAY; B-10; TESTS; NUCLEOSYNTHESIS; FERMIONS; TARGETS AB A measurement of the neutron lifetime tau(n) performed by the absolute counting of in-beam neutrons and their decay protons has been completed. Protons confined in a quasi-Penning trap were accelerated onto a silicon detector held at a high potential and counted with nearly unit efficiency. The neutrons were counted by a device with an efficiency inversely proportional to neutron velocity, which cancels the dwell time of the neutron beam in the trap. The result is tau(n) = (886.3 +/- 1.2[stat] +/- 3.2[sys]) s, which is the most precise measurement of the lifetime using an in-beam method. The systematic uncertainty is dominated by neutron counting, in particular, the mass of the deposit and the Li-6(n,t) cross section. The measurement technique and apparatus, data analysis, and investigation of systematic uncertainties are discussed in detail. C1 NIST, Gaithersburg, MD 20899 USA. Tulane Univ, New Orleans, LA 70118 USA. Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA. Univ Tennessee, Oak Ridge Natl Lab, Knoxville, TN 37996 USA. Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium. Scottish Univ Res & Reactor Ctr, E Kilbride G75 0QU, Lanark, Scotland. RP NIST, Gaithersburg, MD 20899 USA. NR 59 TC 49 Z9 49 U1 0 U2 10 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 2005 VL 71 IS 5 AR 055502 DI 10.1103/PhysRevC.71.055502 PG 27 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200064 ER PT J AU Nonaka, C Muller, B Bass, SA Asakawa, M AF Nonaka, C Muller, B Bass, SA Asakawa, M TI Possible resolutions of the D-puzzle SO PHYSICAL REVIEW C LA English DT Article ID HADRON-PRODUCTION; COLLISIONS; FLUCTUATIONS; HADRONIZATION AB We explore possible ways of explaining the net charge event-by-event fluctuations in Au+Au collisions observed in experiments at the Relativistic Heavy Ion Collider within a quark recombination model. We estimate the number of quarks at recombination and their implications for the predicted net charge fluctuations. We also discuss the consequences of diquark and quark-antiquark clustering above the deconfinement temperature. C1 Duke Univ, Dept Phys, Durham, NC 27708 USA. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan. RP Nonaka, C (reprint author), Duke Univ, Dept Phys, Durham, NC 27708 USA. OI Bass, Steffen/0000-0002-9451-0954 NR 40 TC 17 Z9 17 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 2005 VL 71 IS 5 AR 051901 DI 10.1103/PhysRevC.71.051901 PG 5 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200006 ER PT J AU Parikh, A Caggiano, JA Deibel, C Greene, JP Lewis, R Parker, PD Wrede, C AF Parikh, A Caggiano, JA Deibel, C Greene, JP Lewis, R Parker, PD Wrede, C TI Mass measurements of Mg-22 and Si-26 via the Mg-24(p,t)Mg-22 and Si-28(p,t)Si-26 reactions SO PHYSICAL REVIEW C LA English DT Article ID GALACTIC AL-26; EMISSION; NA-22; NOVAE AB Using a 33 MeV proton beam with our Enge split-pole spectrograph, we measured the Q(0) values of the Mg-24(p,t)Mg-22 and Si-28(p,t)Si-26 reactions relative to that of the O-16(p,t)O-14 reaction. Data were obtained at scattering angles of 15(degrees) and 25(degrees). Based on the masses of Mg-24, Si-28, O-16, O-14,p, and t, we determined the mass excesses of Mg-22 and Si-26 to be -400.5(1.0) and -7139.5(1.0) keV, respectively. Our result for the mass of Mg-22 is in excellent agreement with recent high-precision measurements. C1 Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Parikh, A (reprint author), Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. NR 26 TC 22 Z9 22 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 2005 VL 71 IS 5 AR 055804 DI 10.1103/PhysRevC.71.055804 PG 6 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200068 ER PT J AU Plettner, C Ai, H Beausang, CW Bernstein, LA Ahle, L Amro, H Babilon, M Burke, JT Caggiano, JA Casten, RF Church, JA Cooper, JR Crider, B Gurdal, G Heinz, A McCutchan, EA Moody, K Punyon, JA Qian, J Ressler, JJ Schiller, A Williams, E Younes, W AF Plettner, C Ai, H Beausang, CW Bernstein, LA Ahle, L Amro, H Babilon, M Burke, JT Caggiano, JA Casten, RF Church, JA Cooper, JR Crider, B Gurdal, G Heinz, A McCutchan, EA Moody, K Punyon, JA Qian, J Ressler, JJ Schiller, A Williams, E Younes, W TI Estimation of (n,f) cross sections by measuring reaction probability ratios SO PHYSICAL REVIEW C LA English DT Article ID PLUTONIUM ISOTOPES; FISSION; URANIUM; U-237; D,PF AB Neutron-induced reaction cross sections on unstable nuclei are inherently difficult to measure due to target activity and the low intensity of neutron beams. In an alternative approach, named the "surrogate" technique, one measures the decay probability of the same compound nucleus produced using a stable beam on a stable target to estimate the neutron-induced reaction cross section. As an extension of the surrogate method, in this paper we introduce a new technique of measuring the fission probabilities of two different compound nuclei as a ratio, which has the advantage of removing most of the systematic uncertainties. This method was benchmarked in this report by measuring the probability of deuteron-induced fission events in coincidence with protons, and forming the ratio P[U-236(d,pf)]/P[U-238(d,pf)], which serves as a surrogate for the known cross section ratio of U-236(n,f)/U-238(n,f). In addition, the P[U-238(d,d(')f)]/P[U-236(d,d(')f)] ratio as a surrogate for the U-237(n,f)/U-235(n,f) cross section ratio was measured for the first time in an unprecedented range of excitation energies. C1 Yale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06511 USA. Univ Richmond, Dept Phys, Richmond, VA 23173 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany. Clark Univ, Worcester, MA 01610 USA. Michigan State Univ, NSCL, E Lansing, MI 48824 USA. RP Plettner, C (reprint author), Yale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06511 USA. RI Ressler, Jennifer Jo/F-2279-2010; Qian, Jing/F-9639-2010; Heinz, Andreas/E-3191-2014; Williams, Elizabeth/D-3442-2014; Burke, Jason/I-4580-2012 NR 22 TC 57 Z9 57 U1 0 U2 9 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 2005 VL 71 IS 5 AR 051602 DI 10.1103/PhysRevC.71.051602 PG 5 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200003 ER PT J AU Price, JW Nefkens, BMK Ducote, JL Goetz, JT Adams, G Ambrozewicz, P Anciant, E Anghinolfi, M Asavapibhop, B Audit, G Auger, T Avakian, H Bagdasaryan, H Ball, JP Barrow, S Battaglieri, M Beard, K Bektasoglu, M Bellis, M Benmouna, N Berman, BL Bianchi, N Biselli, AS Boiarinov, S Bouchigny, S Bradford, R Branford, D Briscoe, WJ Brooks, WK Burkert, VD Butuceanu, C Calarco, JR Carman, DS Carnahan, B Cetina, C Chen, S Cole, PL Coleman, A Connelly, J Cords, D Corvisiero, P Crabb, D Crannell, H Cummings, JP Sanctis, ED DeVita, R Degtyarenko, PV Denizli, H Dennis, L Dharmawardane, KV Djalali, C Dodge, GE Doughty, D Dragovitsch, P Dugger, M Dytman, S Dzyubak, OP Eckhause, M Egiyan, H Egiyan, KS Elouadrhiri, L Empl, A Eugenio, P Farhi, L Fatemi, R Feuerbach, RJ Forest, TA Frolov, V Funsten, H Gaff, SJ Gavalian, G Gilfoyle, GP Giovanetti, KL Gordon, CIO Gothe, R Griffioen, K Guidal, M Guillo, M Guler, N Guo, L Gyurjyan, V Hadjidakis, C Hakobyan, RS Hancock, D Hardie, J Heddle, D Hersman, FW Hicks, K Hleiqawi, I Holtrop, M Hu, J Hyde-Wright, CE Ilieva, Y Ireland, D Ito, MM Jenkins, D Joo, K Juengst, HG Kelley, JH Kellie, J Khandaker, M Kim, KY Kim, K Kim, W Klein, A Klein, FJ Klimenko, AV Klusman, M Kossov, M Kramer, LH Kuang, Y Kubarovsky, V Kuhn, SE Kuhn, J Lachniet, J Laget, JM Langheinrich, J Lawrence, D Li, J Livingston, K Lukashin, K Major, W Manak, JJ Marchand, C McAleer, S McNabb, JWC Mecking, BA Melone, JJ Mestayer, MD Meyer, CA Mikhailov, K Mirazita, M Miskimen, R Morand, L Morrow, SA Muccifora, V Mueller, J Mutchler, GS Napolitano, J Nasseripour, R Nelson, SO Niccolai, S Niculescu, G Niculescu, I Niczyporuk, BB Niyazov, RA Nozar, M O'Brien, JT O'Rielly, GV Osipenko, M Ostrovidov, A Park, K Pasyuk, E Peterson, G Philips, SA Pivnyuk, N Pocanic, D Pogorelko, O Polli, E Pozdniakov, S Preedom, BM Prok, Y Protopopescu, D Qin, LM Raue, BA Riccardi, G Ricco, G Ripani, M Ritchie, BG Ronchetti, F Rosner, G Rossi, P Rowntree, D Rubin, PD Sabatie, F Sabourov, K Salgado, C Santoro, JP Sanzone-Arenhovel, M Sapunenko, V Schumacher, RA Serov, VS Shafi, A Sharabian, YG Shaw, J Simionatto, S Skabelin, AV Smith, ES Smith, T Smith, LC Sober, DI Spraker, M Stavinsky, A Stepanyan, S Stokes, B Stoler, P Strakovsky, II Strauch, S Taiuti, M Taylor, S Tedeschi, DJ Thoma, U Thompson, R Tkabladze, A Todor, L Tur, C Ungaro, M Vineyard, MF Vlassov, AV Wang, K Weinstein, LB Weller, H Weygand, DP Williams, M Witkowski, M Wolin, E Wood, MH Yegneswaran, A Yun, J AF Price, JW Nefkens, BMK Ducote, JL Goetz, JT Adams, G Ambrozewicz, P Anciant, E Anghinolfi, M Asavapibhop, B Audit, G Auger, T Avakian, H Bagdasaryan, H Ball, JP Barrow, S Battaglieri, M Beard, K Bektasoglu, M Bellis, M Benmouna, N Berman, BL Bianchi, N Biselli, AS Boiarinov, S Bouchigny, S Bradford, R Branford, D Briscoe, WJ Brooks, WK Burkert, VD Butuceanu, C Calarco, JR Carman, DS Carnahan, B Cetina, C Chen, S Cole, PL Coleman, A Connelly, J Cords, D Corvisiero, P Crabb, D Crannell, H Cummings, JP Sanctis, ED DeVita, R Degtyarenko, PV Denizli, H Dennis, L Dharmawardane, KV Djalali, C Dodge, GE Doughty, D Dragovitsch, P Dugger, M Dytman, S Dzyubak, OP Eckhause, M Egiyan, H Egiyan, KS Elouadrhiri, L Empl, A Eugenio, P Farhi, L Fatemi, R Feuerbach, RJ Forest, TA Frolov, V Funsten, H Gaff, SJ Gavalian, G Gilfoyle, GP Giovanetti, KL Gordon, CIO Gothe, R Griffioen, K Guidal, M Guillo, M Guler, N Guo, L Gyurjyan, V Hadjidakis, C Hakobyan, RS Hancock, D Hardie, J Heddle, D Hersman, FW Hicks, K Hleiqawi, I Holtrop, M Hu, J Hyde-Wright, CE Ilieva, Y Ireland, D Ito, MM Jenkins, D Joo, K Juengst, HG Kelley, JH Kellie, J Khandaker, M Kim, KY Kim, K Kim, W Klein, A Klein, FJ Klimenko, AV Klusman, M Kossov, M Kramer, LH Kuang, Y Kubarovsky, V Kuhn, SE Kuhn, J Lachniet, J Laget, JM Langheinrich, J Lawrence, D Li, J Livingston, K Lukashin, K Major, W Manak, JJ Marchand, C McAleer, S McNabb, JWC Mecking, BA Melone, JJ Mestayer, MD Meyer, CA Mikhailov, K Mirazita, M Miskimen, R Morand, L Morrow, SA Muccifora, V Mueller, J Mutchler, GS Napolitano, J Nasseripour, R Nelson, SO Niccolai, S Niculescu, G Niculescu, I Niczyporuk, BB Niyazov, RA Nozar, M O'Brien, JT O'Rielly, GV Osipenko, M Ostrovidov, A Park, K Pasyuk, E Peterson, G Philips, SA Pivnyuk, N Pocanic, D Pogorelko, O Polli, E Pozdniakov, S Preedom, BM Prok, Y Protopopescu, D Qin, LM Raue, BA Riccardi, G Ricco, G Ripani, M Ritchie, BG Ronchetti, F Rosner, G Rossi, P Rowntree, D Rubin, PD Sabatie, F Sabourov, K Salgado, C Santoro, JP Sanzone-Arenhovel, M Sapunenko, V Schumacher, RA Serov, VS Shafi, A Sharabian, YG Shaw, J Simionatto, S Skabelin, AV Smith, ES Smith, T Smith, LC Sober, DI Spraker, M Stavinsky, A Stepanyan, S Stokes, B Stoler, P Strakovsky, II Strauch, S Taiuti, M Taylor, S Tedeschi, DJ Thoma, U Thompson, R Tkabladze, A Todor, L Tur, C Ungaro, M Vineyard, MF Vlassov, AV Wang, K Weinstein, LB Weller, H Weygand, DP Williams, M Witkowski, M Wolin, E Wood, MH Yegneswaran, A Yun, J TI Exclusive photoproduction of the cascade (Xi) hyperons SO PHYSICAL REVIEW C LA English DT Article ID INCLUSIVE PHOTOPRODUCTION; PENTAQUARKS; BARYONS AB We report on the first measurement of exclusive Xi(-)(1321) hyperon photoproduction in gamma p -> K(+)K(+)Xi(-) for 3.2 < E-gamma< 3.9 GeV. The final state is identified by the missing mass in p(gamma,K+K+)X measured with the CLAS detector at Jefferson Laboratory. We have detected a significant number of the ground state Xi(-)(1321)1/2(+) and have estimated the total cross section for its production. We also have strong evidence for the first excited state Xi(-)(1530)3/2(+). Photoproduction provides a copious source of Xi's. We discuss the possibilities of a search for the recently proposed Xi(5)(-) and Xi(5)(+) pentaquarks. C1 Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Arizona State Univ, Tempe, AZ 85287 USA. CEA Saclay, Serv Phys Nucl, DAPINA, SPhN, Gif Sur Yvette, France. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Catholic Univ Amer, Washington, DC 20064 USA. Christopher Newport Univ, Newport News, VA 23606 USA. Univ Connecticut, Storrs, CT 06269 USA. Duke Univ, Durham, NC 27708 USA. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Florida Int Univ, Miami, FL 33199 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Giessen, Inst Phys, D-35392 Giessen, Germany. George Washington Univ, Washington, DC 20052 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Idaho State Univ, Pocatello, ID 83209 USA. Ist Nazl Fis Nucl, Nazl Frascati Lab, I-00044 Frascati, Italy. Inst Phys Nucl ORSAY, F-91406 Orsay, France. Inst Theoret & Expt Phys, RU-117259 Moscow, Russia. James Madison Univ, Harrisonburg, VA 22807 USA. Kyungpook Natl Univ, Taegu 702701, South Korea. MIT, Cambridge, MA 02139 USA. Univ Massachusetts, Amherst, MA 01003 USA. Univ New Hampshire, Durham, NH 03824 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Ohio Univ, Athens, OH 45701 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Penn State Univ, University Pk, PA 16802 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Univ Roma III, I-00146 Rome, Italy. Rensselaer Polytech Inst, Troy, NY 12180 USA. Rice Univ, Houston, TX 77005 USA. Univ Richmond, Richmond, VA 23173 USA. Univ S Carolina, Columbia, SC 29208 USA. Thomas Jefferson Natl Accelerator Lab, Newport News, VA 23606 USA. Union Coll, Schenectady, NY 12308 USA. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Univ Virginia, Charlottesville, VA 22901 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Univ Calif Los Angeles, Los Angeles, CA 90095 USA. EM price@physics.ucla.edu RI Ireland, David/E-8618-2010; Bektasoglu, Mehmet/A-2074-2012; Protopopescu, Dan/D-5645-2012; riccardi, gabriele/A-9269-2012; Brooks, William/C-8636-2013; Schumacher, Reinhard/K-6455-2013; Auger, Thierry/L-1073-2013; Meyer, Curtis/L-3488-2014; Sabatie, Franck/K-9066-2015; Osipenko, Mikhail/N-8292-2015; OI Ireland, David/0000-0001-7713-7011; Brooks, William/0000-0001-6161-3570; Schumacher, Reinhard/0000-0002-3860-1827; Meyer, Curtis/0000-0001-7599-3973; Sabatie, Franck/0000-0001-7031-3975; Osipenko, Mikhail/0000-0001-9618-3013; Hyde, Charles/0000-0001-7282-8120; Bellis, Matthew/0000-0002-6353-6043 NR 20 TC 20 Z9 20 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD MAY PY 2005 VL 71 IS 5 AR 058201 DI 10.1103/PhysRevC.71.058201 PG 5 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200074 ER PT J AU Punjabi, V Perdrisat, CF Aniol, KA Baker, FT Berthot, J Bertin, PY Bertozzi, W Besson, A Bimbot, L Boeglin, WU Brash, EJ Brown, D Calarco, JR Cardman, LS Chai, Z Chang, CC Chen, JP Chudakov, E Churchwell, S Cisbani, E Dale, DS Leo, RD Deur, A Diederich, B Domingo, JJ Epstein, MB Ewell, LA Fissum, KG Fleck, A Fonvieille, H Frullani, S Gao, J Garibaldi, F Gasparian, A Gerstner, G Gilad, S Gilman, R Glamazdin, A Glashausser, C Gomez, J Gorbenko, V Green, A Hansen, JO Howell, CR Huber, GM Iodice, M de Jager, CW Jaminion, S Jiang, X Jones, MK Kahl, W Kelly, JJ Khayat, M Kramer, LH Kumbartzki, G Kuss, M Lakuriki, E Laveissiere, G LeRose, JJ Liang, M Lindgren, RA Liyanage, N Lolos, GJ Macri, R Madey, R Malov, S Margaziotis, DJ Markowitz, P McCormick, K McIntyre, JI van der Meer, RLJ Michaels, R Milbrath, BD Mougey, JY Nanda, SK Offermann, EAJM Papandreou, Z Pentchev, L Petratos, GG Piskunov, NM Pomatsalyuk, RI Prout, DL Quemener, G Ransome, RD Raue, BA Roblin, Y Roche, R Rutledge, G Rutt, PM Saha, A Saito, T Sarty, AJ Smith, TP Sorokin, P Strauch, S Suleiman, R Takahashi, K Templon, JA Todor, L Ulmer, PE Urciuoli, GM Vernin, P Vlahovic, B Voskanyan, H Wijesooriya, K Wojtsekhowski, BB Woo, RJ Xiong, F Zainea, GD Zhou, ZL AF Punjabi, V Perdrisat, CF Aniol, KA Baker, FT Berthot, J Bertin, PY Bertozzi, W Besson, A Bimbot, L Boeglin, WU Brash, EJ Brown, D Calarco, JR Cardman, LS Chai, Z Chang, CC Chen, JP Chudakov, E Churchwell, S Cisbani, E Dale, DS Leo, RD Deur, A Diederich, B Domingo, JJ Epstein, MB Ewell, LA Fissum, KG Fleck, A Fonvieille, H Frullani, S Gao, J Garibaldi, F Gasparian, A Gerstner, G Gilad, S Gilman, R Glamazdin, A Glashausser, C Gomez, J Gorbenko, V Green, A Hansen, JO Howell, CR Huber, GM Iodice, M de Jager, CW Jaminion, S Jiang, X Jones, MK Kahl, W Kelly, JJ Khayat, M Kramer, LH Kumbartzki, G Kuss, M Lakuriki, E Laveissiere, G LeRose, JJ Liang, M Lindgren, RA Liyanage, N Lolos, GJ Macri, R Madey, R Malov, S Margaziotis, DJ Markowitz, P McCormick, K McIntyre, JI van der Meer, RLJ Michaels, R Milbrath, BD Mougey, JY Nanda, SK Offermann, EAJM Papandreou, Z Pentchev, L Petratos, GG Piskunov, NM Pomatsalyuk, RI Prout, DL Quemener, G Ransome, RD Raue, BA Roblin, Y Roche, R Rutledge, G Rutt, PM Saha, A Saito, T Sarty, AJ Smith, TP Sorokin, P Strauch, S Suleiman, R Takahashi, K Templon, JA Todor, L Ulmer, PE Urciuoli, GM Vernin, P Vlahovic, B Voskanyan, H Wijesooriya, K Wojtsekhowski, BB Woo, RJ Xiong, F Zainea, GD Zhou, ZL CA Jefferson Lab Hall A Collaboration TI Proton elastic form factor ratios to Q(2)=3.5 GeV2 by polarization transfer SO PHYSICAL REVIEW C LA English DT Review ID CONSTITUENT-QUARK-MODEL; C ANALYZING POWER; DISPERSION-THEORETICAL ANALYSIS; SQUARED 4-MOMENTUM TRANSFERS; LARGE-MOMENTUM-TRANSFER; ELECTRON-SCATTERING; QUANTUM CHROMODYNAMICS; HYPERFINE INTERACTIONS; EXCLUSIVE PROCESSES; POLARIMETER POMME AB The ratio of the proton elastic electromagnetic form factors, G(Ep)/G(Mp), was obtained by measuring P-t and P-l, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic e(->)p -> ep(->)reaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV2. In the single-photon exchange approximation, G(Ep)/G(Mp) is directly proportional to P-t/P-l. The simultaneous measurement of P-t and P-l in a polarimeter reduces systematic uncertainties. The results for G(Ep)/G(Mp) show a systematic decrease with increasing Q(2), indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been reanalyzed and their systematic uncertainties have become significantly smaller than those reported previously. C1 Norfolk State Univ, Norfolk, VA 23504 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Rutgers State Univ, Piscataway, NJ 08855 USA. Univ Georgia, Athens, GA 30602 USA. Univ Regina, Regina, SK S4S 0A2, Canada. Univ Clermont Ferrand, CNRS, IN2P3, F-63117 Aubiere, France. Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Duke Univ, Durham, NC 27708 USA. TUNL, Durham, NC 27708 USA. Eastern Kentucky Univ, Richmond, KY 40475 USA. Florida Int Univ, Miami, FL 33199 USA. Florida State Univ, Tallahassee, FL 32306 USA. Hampton Univ, Hampton, VA 23668 USA. Univ Bari, I-70126 Bari, Italy. Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy. Ist Super Sanita, I-00161 Rome, Italy. Joint Inst Nucl Res, LHE, Dubna 141980, Russia. Kent State Univ, Kent, OH 44242 USA. Univ Kentucky, Lexington, KY 40506 USA. Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine. CNRS, Lab Phys Subatom & Cosmol, IN2P3, F-38026 St Martin Dheres, France. Univ Manitoba, Winnipeg, MB R3T 2N2, Canada. Univ Maryland, College Pk, MD 20742 USA. MIT, Cambridge, MA 02139 USA. Univ New Hampshire, Durham, NH 03824 USA. N Carolina Cent Univ, Durham, NC 27707 USA. Old Dominion Univ, Norfolk, VA 23508 USA. Inst Phys Nucl, F-91406 Orsay, France. CEA Saclay, F-91191 Gif Sur Yvette, France. Syracuse Univ, Syracuse, NY 13244 USA. Temple Univ, Philadelphia, PA 19122 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Virginia, Charlottesville, VA 22901 USA. Univ Western Cape, Cape Town, South Africa. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Punjabi, V (reprint author), Norfolk State Univ, Norfolk, VA 23504 USA. EM punjabi@jlab.org RI Kuss, Michael/H-8959-2012; Sarty, Adam/G-2948-2014; McIntyre, Justin/P-1346-2014; OI McIntyre, Justin/0000-0002-3706-4310; Quemener, Gilles/0000-0001-6703-6655 NR 114 TC 239 Z9 239 U1 0 U2 8 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 2005 VL 71 IS 5 AR 055202 DI 10.1103/PhysRevC.71.055202 PG 27 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200058 ER PT J AU Seweryniak, D Uusitalo, J Bhattacharyya, P Carpenter, MP Cizewski, JA Ding, KY Davids, CN Fotiades, N Janssens, RVF Lauritsen, T Lister, CJ Macchiavelli, AO Nisius, D Reiter, P Walters, WB Woods, PJ AF Seweryniak, D Uusitalo, J Bhattacharyya, P Carpenter, MP Cizewski, JA Ding, KY Davids, CN Fotiades, N Janssens, RVF Lauritsen, T Lister, CJ Macchiavelli, AO Nisius, D Reiter, P Walters, WB Woods, PJ TI Multiparticle configurations in N=84 isotones located at the proton drip line SO PHYSICAL REVIEW C LA English DT Article ID YRAST STATES; OCTUPOLE STATES; NUCLEI AB Excited states in the proton-rich N=84 isotones Hf-156(72)84, Ta-157(73)84, and W-158(74)84 were observed using Pd-102(Ni-58, xp2n) reactions at 270 MeV. gamma rays were detected with the Gammasphere array of Compton-suppressed Ge detectors coupled with the Argonne fragment mass analyzer and were assigned to individual reaction channels using the recoil-decay tagging method. Prompt gamma-ray cascades were associated with the alpha decay of both the ground state and the 8(+) isomeric state in Hf-156, the h(11/2) state in Ta-157, and the 8(+) isomeric state in W-158. The level schemes constructed for Hf-156,Ta-157, and W-158 are compared with these of lighter N=84 isotones and are discussed within the framework of the shell model. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Maryland, College Pk, MD 20742 USA. Purdue Univ, W Lafayette, IN 47907 USA. Rutgers State Univ, New Brunswick, NJ 08903 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Edinburgh, Edinburgh EH9 3JX, Midlothian, Scotland. RP Seweryniak, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 18 TC 12 Z9 12 U1 1 U2 22 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 2005 VL 71 IS 5 AR 054319 DI 10.1103/PhysRevC.71.054319 PG 9 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200032 ER PT J AU Vogt, R AF Vogt, R TI Shadowing and absorption effects on J/psi production in dA collisions SO PHYSICAL REVIEW C LA English DT Article ID RADIATIVE ENERGY-LOSS; PARTON DISTRIBUTIONS; QUARKONIUM PRODUCTION; HADRONIC COLLISIONS; NUCLEUS COLLISIONS; SUPPRESSION; CHARM; HADROPRODUCTION; SYSTEMATICS; DEPENDENCE AB We study medium modifications of J/psi production in cold nuclear media in deuterium-nucleus collisions. We discuss several parametrizations of the modifications of the parton densities in the nucleus, known as shadowing, an initial-state effect. We also include absorption of the produced J/psi by nucleons, a final-state effect. Both spatially homogeneous and inhomogeneous shadowing and absorption are considered. We use the number of binary nucleon-nucleon collisions as a centrality measure. Results are presented for d+Au collisions at root S-NN = 200 GeV and for d+Pb collisions at root S-NN = 6.2 TeV. To contrast the centrality dependence in pA and dA collisions, we also present p+Pb results at root S-NN = 8.8 TeV. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 46 TC 92 Z9 93 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 2005 VL 71 IS 5 AR 054902 DI 10.1103/PhysRevC.71.054902 PG 11 WC Physics, Nuclear SC Physics GA 930TO UT WOS:000229440200051 ER PT J AU Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Agelou, M Agram, JL Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Andeen, T Anderson, S Andrieu, B Arnoud, Y Askew, A Asman, B Jesus, ACSA Atramentov, O Autermann, C Avila, C Badaud, F Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Bargassa, P Baringer, P Barnes, C Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beauceron, S Begel, M Bellavance, A Beri, SB Bernardi, G Bernhard, R Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Binder, M Biscarat, C Black, KM Blackler, I Blazey, G Blekman, F Blessing, S Bloch, D Blumenschein, U Boehnlein, A Boeriu, O Bolton, TA Borcherding, F Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burnett, TH Busato, E Buszello, CP Butler, JM Bystricky, J Caron, S Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chandra, A Chapin, D Charles, F Cheu, E Cho, DK Choi, S Choudhary, B Christiansen, T Christofek, L Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Coppage, D Corcoran, M Cothenet, A Cousinou, MC Cox, B Crepe-Renaudin, S Cutts, D da Motta, H Davies, B Davies, G Davis, GA De, K de Jong, P de Jong, SJ Cruz-Burelo, EDL Martins, CDO Dean, S Degenhardt, JD Deliot, F Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doidge, M Dong, H Doulas, S Dudko, LV Duflot, L Dugad, SR Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Edwards, T Ellison, J Elmsheuser, J Elvira, VD Eno, S Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, A Evdokimov, VN Fast, J Fatakia, SN Feligioni, L Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Fleck, I Fortner, M Fox, H Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gardner, J Gavrilov, V Gay, P Gele, D Gelhaus, R Genser, K Gerber, CE Gershtein, Y Gillberg, D Ginther, G Golling, T Gollub, N Gomez, B Gounder, K Goussiou, A Grannis, PD Greder, S Greenlee, H Greenwood, ZD Gregores, EM Gris, P Grivaz, JF Groer, L Grunendahl, S Grunewald, MW Gurzhiev, SN Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Hagopian, S Hall, I Hall, RE Han, C Han, L Hanagaki, K Harder, K Harel, A Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hensel, C Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hohlfeld, M Hong, SJ Hooper, R Houben, P Hu, Y Huang, J Hynek, V Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jain, V Jakobs, K Jenkins, A Jesik, R Johns, K Johnson, M Jonckheere, A Jonsson, P Juste, A Kafer, D Kahn, S Kajfasz, E Kalinin, AM Kalk, J Karmanov, D Kasper, J Kau, D Kaur, R Kehoe, R Kermiche, S Kesisoglou, S Khanov, A Kharchilava, A 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L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stanton, NR Stark, J Steele, J Stevenson, K Stolin, V Stone, A Stoyanova, DA Strandberg, J Strang, MA Strauss, M Strohmer, R Strom, D Strovink, M Stutte, L Sumowidagdo, S Sznajder, A Talby, M Tamburello, P Taylor, W Telford, P Temple, J Tomoto, M Toole, T Torborg, J Towers, S Trefzger, T Trincaz-Duvoid, S Tuchming, B Tully, C Turcot, AS Tuts, PM Uvarov, L Uvarov, S Uzunyan, S Vachon, B van Kooten, R van Leeuwen, WM Varelas, N Varnes, EW Vartapetian, A Vasilyev, IA Vaupel, M Verdier, P Vertogradov, LS Verzocchi, M Villeneuve-Seguier, F Vlimant, JR Toerne, EV Vreeswijk, M Anh, TV Wahl, HD Wang, L Warchol, J Watts, G Wayne, M Weber, M Weerts, H Wegner, M Wermes, N White, A White, V Wicke, D Wijngaarden, DA Wilson, GW Wimpenny, SJ Wittlin, J Wobisch, M Womersley, J Wood, DR Wyatt, TR Xu, Q Xuan, N Yacoob, S Yamada, R Yan, M Yasuda, T Yatsunenko, YA Yen, Y Yip, K Yoo, HD Youn, SW Yu, J Yurkewicz, A Zabi, A Zatserklyaniy, A Zdrazil, M Zeitnitz, C Zhang, D Zhang, X Zhao, T Zhao, Z Zhou, B Zhu, J Zielinski, M Zieminska, D Zieminski, A Zitoun, R Zutshi, V Zverev, EG AF Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Agelou, M Agram, JL Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Andeen, T Anderson, S Andrieu, B Arnoud, Y Askew, A Asman, B Jesus, ACSA Atramentov, O Autermann, C Avila, C Badaud, F Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Bargassa, P Baringer, P Barnes, C Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beauceron, S Begel, M Bellavance, A Beri, SB Bernardi, G Bernhard, R Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Binder, M Biscarat, C Black, KM Blackler, I Blazey, G Blekman, F Blessing, S Bloch, D Blumenschein, U Boehnlein, A Boeriu, O Bolton, TA Borcherding, F Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burnett, TH Busato, E Buszello, CP Butler, JM Bystricky, J Caron, S Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chandra, A Chapin, D Charles, F Cheu, E Cho, DK Choi, S Choudhary, B Christiansen, T Christofek, L Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Coppage, D Corcoran, M Cothenet, A Cousinou, MC Cox, B Crepe-Renaudin, S Cutts, D da Motta, H Davies, B Davies, G Davis, GA De, K de Jong, P de Jong, SJ Cruz-Burelo, EDL Martins, CDO Dean, S Degenhardt, JD Deliot, F Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doidge, M Dong, H Doulas, S Dudko, LV Duflot, L Dugad, SR Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Edwards, T Ellison, J Elmsheuser, J Elvira, VD Eno, S Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, A Evdokimov, VN Fast, J Fatakia, SN Feligioni, L Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Fleck, I Fortner, M Fox, H Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gardner, J Gavrilov, V Gay, P Gele, D Gelhaus, R Genser, K Gerber, CE Gershtein, Y Gillberg, D Ginther, G Golling, T Gollub, N Gomez, B Gounder, K Goussiou, A Grannis, PD Greder, S Greenlee, H Greenwood, ZD Gregores, EM Gris, P Grivaz, JF Groer, L Grunendahl, S Grunewald, MW Gurzhiev, SN Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Hagopian, S Hall, I Hall, RE Han, C Han, L Hanagaki, K Harder, K Harel, A Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hensel, C Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hohlfeld, M Hong, SJ Hooper, R Houben, P Hu, Y Huang, J Hynek, V Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jain, V Jakobs, K Jenkins, A Jesik, R Johns, K Johnson, M Jonckheere, A Jonsson, P Juste, A Kafer, D Kahn, S Kajfasz, E Kalinin, AM Kalk, J Karmanov, D Kasper, J Kau, D Kaur, R Kehoe, R Kermiche, S Kesisoglou, S Khanov, A Kharchilava, A Kharzheev, YM Kim, H Kim, TJ Klima, B Kohli, JM Kopal, M Korablev, VM Kotcher, J Kothari, B Koubarovsky, A Kozelov, AV Kozminski, J Kryemadhi, A Krzywdzinski, S Kulik, Y Kumar, A Kunori, S Kupco, A Kurca, T Kvita, J Lager, S Lahrichi, N Landsberg, G Lazoflores, J Le Bihan, AC Lebrun, P Lee, WM Leflat, A Lehner, F Leonidopoulos, C Leveque, J Lewis, P Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipaev, VV Lipton, R Lobo, L Lobodenko, A Lokajicek, M Lounis, A Love, P Lubatti, HJ Lueking, L Lynker, M Lyon, AL Maciel, AKA Madaras, RJ Mattig, P Magass, C Magerkurth, A Magnan, AM Makovec, N Mal, PK Malbouisson, HB Malik, S Malyshev, VL Mao, HS Maravin, Y Martens, M Mattingly, SEK Mayorov, AA McCarthy, R McCroskey, R Meder, D Melanson, HL Melnitchouk, A Mendes, A Merkin, M Merritt, KW Meyer, A Meyer, J Michaut, M Miettinen, H Mitrevski, J Molina, J Mondal, NK Moore, RW Muanza, GS Mulders, M Mutaf, YD Nagy, E Narain, M Naumann, NA Neal, HA Negret, JP Nelson, S Neustroev, P Noeding, C Nomerotski, A Novaes, SF Nunnemann, T Nurse, E O'Dell, V O'Neil, DC Oguri, V Oliveira, N Oshima, N Garzon, GJOY Padley, P Parashar, N Park, SK Parsons, J Partridge, R Parua, N Patwa, A Pawloski, G Perea, PM Perez, E Petroff, P Petteni, M Piegaia, R Pleier, MA Podesta-Lerma, PLM Podstavkov, VM Pogorelov, Y Pope, BG da Silva, WLP Prosper, HB Protopopescu, S Qian, J Quadt, A Quinn, B Rani, KJ Ranjan, K Rapidis, PA Ratoff, PN Reucroft, S Rijssenbeek, M Ripp-Baudot, I Rizatdinova, F Robinson, S Rodrigues, RF Royon, C Rubinov, P Ruchti, R Rud, VI Sajot, G Sanchez-Hernandez, A Sanders, MP Santoro, A Savage, G Sawyer, L Scanlon, T Schaile, D Schamberger, RD Schellman, H Schieferdecker, P Schmitt, C Schwanenberger, C Schwartzman, A Schwienhorst, R Sengupta, S Severini, H Shabalina, E Shamim, M Shary, V Shchukin, AA Shephard, WD Shivpuri, RK Shpakov, D Sidwell, RA Simak, V Sirotenko, V Skubic, P Slattery, P Smith, RP Smolek, K Snow, GR Snow, J Snyder, S Soldner-Rembold, S Song, X Sonnenschein, L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stanton, NR Stark, J Steele, J Stevenson, K Stolin, V Stone, A Stoyanova, DA Strandberg, J Strang, MA Strauss, M Strohmer, R Strom, D Strovink, M Stutte, L Sumowidagdo, S Sznajder, A Talby, M Tamburello, P Taylor, W Telford, P Temple, J Tomoto, M Toole, T Torborg, J Towers, S Trefzger, T Trincaz-Duvoid, S Tuchming, B Tully, C Turcot, AS Tuts, PM Uvarov, L Uvarov, S Uzunyan, S Vachon, B van Kooten, R van Leeuwen, WM Varelas, N Varnes, EW Vartapetian, A Vasilyev, IA Vaupel, M Verdier, P Vertogradov, LS Verzocchi, M Villeneuve-Seguier, F Vlimant, JR Toerne, EV Vreeswijk, M Anh, TV Wahl, HD Wang, L Warchol, J Watts, G Wayne, M Weber, M Weerts, H Wegner, M Wermes, N White, A White, V Wicke, D Wijngaarden, DA Wilson, GW Wimpenny, SJ Wittlin, J Wobisch, M Womersley, J Wood, DR Wyatt, TR Xu, Q Xuan, N Yacoob, S Yamada, R Yan, M Yasuda, T Yatsunenko, YA Yen, Y Yip, K Yoo, HD Youn, SW Yu, J Yurkewicz, A Zabi, A Zatserklyaniy, A Zdrazil, M Zeitnitz, C Zhang, D Zhang, X Zhao, T Zhao, Z Zhou, B Zhu, J Zielinski, M Zieminska, D Zieminski, A Zitoun, R Zutshi, V Zverev, EG TI Measurement of the pp(-)-> W gamma plus X cross section at root s=1.96 TeV and WW gamma anomalous coupling limits SO PHYSICAL REVIEW D LA English DT Article ID P(P)OVER-BAR COLLISIONS; COLLIDER AB The WW gamma triple gauge boson coupling parameters are studied using p (p) over bar -> l nu gamma + X(l = e, mu) events at root s = 1.96 TeV. The data were collected with the D0 detector from an integrated luminosity of 162 pb(-1) delivered by the Fermilab Tevatron Collider. The cross section times branching fraction for p (p) over bar -> W(gamma) + X -> l nu gamma + X with E-T(gamma) > 8 GeV and Delta R-l gamma > 0.7 is 14.8 +/- 1.6(stat) +/- 1.0(syst) +/- 1.0(lum) pb. The one-dimensional 95% confidence level limits on anomalous couplings are -0.88 < Delta kappa(gamma) < 0.96 and -0.20 < lambda(gamma) < 0.20. C1 Joint Inst Nucl Res, Dubna, Russia. Korea Univ, Korea Detector Lab, Seoul 136701, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. FOM, NIKHEF, Amsterdam, Netherlands. Radboud Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Petersburg Nucl Phys Inst, St Petersburg, Russia. Lund Univ, Lund, Sweden. 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RI Telford, Paul/B-6253-2011; 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; Novaes, Sergio/D-3532-2012; Yip, Kin/D-6860-2013; De, Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013; Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy, Viatcheslav/F-9057-2014; KIM, Tae Jeong/P-7848-2015; Sznajder, Andre/L-1621-2016 OI Dudko, Lev/0000-0002-4462-3192; Novaes, Sergio/0000-0003-0471-8549; Yip, Kin/0000-0002-8576-4311; De, Kaushik/0000-0002-5647-4489; Sharyy, Viatcheslav/0000-0002-7161-2616; KIM, Tae Jeong/0000-0001-8336-2434; Sznajder, Andre/0000-0001-6998-1108 NR 18 TC 24 Z9 24 U1 0 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. 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L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, T Litvintsev, DO Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Poukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A Denis, RS Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spinella, F Spiropulu, M Spiegel, L Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S TI Measurements of bottom-antibottom azimuthal production correlations in proton-antiproton collisions at root s=1.8 TeV SO PHYSICAL REVIEW D LA English DT Article ID DIFFERENTIAL CROSS-SECTION; GLOBAL QCD ANALYSIS; LUND MONTE-CARLO; ROOT S=1.8 TEV; P(P)OVER-BAR COLLISIONS; QUARK PRODUCTION; PARTON DISTRIBUTIONS; HEAVY QUARKS; STRING MODEL; CDF AB We have measured the azimuthal angular correlation of b (b) over bar production, using 86.5 pb(-1) of data collected by Collider Detector at Fermilab (CDF) in p (p) over bar collisions at root s = 1.8 TeV during 1994-1995. In high-energy p (p) over bar collisions, such as at the Tevatron, b (b) over bar production can be schematically categorized into three mechanisms. The leading-order (LO) process is "flavor creation," where both b and (b) over bar quarks substantially participate in the hard scattering and result in a distinct back-to-back signal in final state. The "flavor excitation" and the "gluon splitting" processes, which appear at next-leading-order (NLO), are known to make a comparable contribution to total b (b) over bar cross section, while providing very different opening angle distributions from the LO process. An azimuthal opening angle between bottom and antibottom, Delta phi, has been used for the correlation measurement to probe the interaction creating b (b) over bar pairs. The Delta phi distribution has been obtained from two different methods. One method measures the Delta phi between bottom hadrons using events with two reconstructed secondary vertex tags. The other method uses b (b) over bar -> (J/psi X)(lX(')) events, where the charged lepton (l) is an electron (e) or a muon (mu), to measure Delta phi between bottom quarks. The b (b) over bar purity is determined as a function of Delta phi by fitting the decay length of the J/psi and the impact parameter of the center dot. Both methods quantify the contribution from higher-order production mechanisms by the fraction of the b (b) over bar pairs produced in the same azimuthal hemisphere, f(toward). The measured f(toward) values are consistent with both parton shower Monte Carlo and NLO QCD predictions. C1 Univ Florida, Gainesville, FL 32611 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 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. Waseda Univ, Tokyo 169, Japan. Joint Inst Nucl Res, RU-141980 Dubna, Russia. 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UCL, London WC1E 6BT, England. RP Univ Florida, Gainesville, FL 32611 USA. RI Chiarelli, Giorgio/E-8953-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Scodellaro, Luca/K-9091-2014; Connolly, Amy/J-3958-2013; Cabrera Urban, Susana/H-1376-2015; Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; Wolter, Marcin/A-7412-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012; Prokoshin, Fedor/E-2795-2012; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015 OI Chiarelli, Giorgio/0000-0001-9851-4816; Ivanov, Andrew/0000-0002-9270-5643; Scodellaro, Luca/0000-0002-4974-8330; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Prokoshin, Fedor/0000-0001-6389-5399; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133 NR 56 TC 24 Z9 24 U1 1 U2 4 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. 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Stelzer-Chilton, O Strologas, J Stuart, D Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takach, SF Takano, H Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tanimoto, N Tapprogge, S Tecchio, M Teng, PK Terashi, K Tesarek, RJ Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tseng, J Tsuchiya, R Tsuno, S Tsybychev, D Turini, N Turner, M Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Varganov, A Vataga, E Vejcik, S Velev, G Veszpremi, V Veramendi, G Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I von der Mey, M Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Yamashita, T Yamamoto, K Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Wolter, M Worcester, M Worm, S Wright, T Wu, X Wurthwein, F Wyatt, A Yagil, A Yang, C Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoon, P Yorita, K Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhou, J Zsenei, A Zucchelli, S TI Search for ZZ and ZW production in pp(-) collisions at root s=1.96 TeV SO PHYSICAL REVIEW D LA English DT Article ID BOSON PAIR-PRODUCTION; P(P)OVER-BAR COLLISIONS; GAMMA COUPLINGS; LIMITS AB We present a search for ZZ and ZW vector boson pair production in p (p) over bar collisions at root z = 1.96 TeV using the leptonic decay channels ZZ -> ll nu nu, ZZ -> lll(')l('), and ZW -> lll(')v. In a data sample corresponding to an integrated luminosity of 194 pb(-1) collected with the Collider Detector at Fermilab, 3 candidate events are found with an expected background of 1.0 +/- 0.2 events. We set a 95% confidence level upper limit of 15.2 pb on the cross section for ZZ plus ZW production, compared to the standard model prediction of 5.0 +/- 0.4 pb. C1 Univ Florida, Gainesville, FL 32611 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain. 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 Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, Inst Fis Cantabria, CSIC, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 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, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Univ Helsinki, Dept Phys Sci, Div High Energy Phys, FIN-00044 Helsinki, Finland. Univ Helsinki, Helsinki Grp, Helsinki Inst Phys, FIN-00044 Helsinki, Finland. 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. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, 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. Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada. Univ Toronto, Toronto, ON M5S 1A7, Canada. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Okayama Univ, Okayama 7008530, Japan. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, 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. Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Wayne State Univ, Detroit, MI 48201 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Univ Florida, Gainesville, FL 32611 USA. RI Amerio, Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi, Alberto/G-6028-2012; Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Chiarelli, Giorgio/E-8953-2012; Ivanov, Andrew/A-7982-2013; Prokoshin, Fedor/E-2795-2012; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Leonardo, Nuno/M-6940-2016; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Gallas Torreira, Abraham Antonio/K-6508-2014; Scodellaro, Luca/K-9091-2014; Connolly, Amy/J-3958-2013; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014; Lazzizzera, Ignazio/E-9678-2015; Cabrera Urban, Susana/H-1376-2015; Cavalli-Sforza, Matteo/H-7102-2015; ciocci, maria agnese /I-2153-2015 OI Punzi, Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Chiarelli, Giorgio/0000-0001-9851-4816; Ivanov, Andrew/0000-0002-9270-5643; Prokoshin, Fedor/0000-0001-6389-5399; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Leonardo, Nuno/0000-0002-9746-4594; Warburton, Andreas/0000-0002-2298-7315; Gallas Torreira, Abraham Antonio/0000-0002-2745-7954; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; Lazzizzera, Ignazio/0000-0001-5092-7531; ciocci, maria agnese /0000-0003-0002-5462 NR 28 TC 11 Z9 11 U1 2 U2 7 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. 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Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, AE Blinov, VE Bukin, 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Rama, M Rizzo, G Simi, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Wilson, FF Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kazuhito, S Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BABAR Collaboration TI Search for B -> J/psi D decays SO PHYSICAL REVIEW D LA English DT Article ID MESONS AB We report a search for B -> J/psi D decays, based on a sample of 124 x 10(6) B (B) over bar events collected with the BABAR detector at the PEP-II storage ring of the Stanford Linear Accelerator Center. No significant signal is found. We obtain upper limits on the branching fractions of 1.3 x 10(-5) for B-0 -> J/psi(D) over bar (0) and 1.2 x 10(-4) for B+ -> J/psi D+ at 90% confidence level. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Univ Bari, 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, Berkeley, CA 94720 USA. Lawrence Berkeley Natl 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. 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RI Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012 OI Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Sarti, Alessio/0000-0001-5419-7951; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455 NR 17 TC 5 Z9 5 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. 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D PD MAY PY 2005 VL 71 IS 9 AR 091103 DI 10.1103/PhysRevD.71.091103 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300003 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Schroeder, T Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, AE Blinov, VE Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, 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Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Di Lodovico, F Brown, CL Cowan, G Flack, RL Flaecher, HU Green, MG Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hodgkinson, MC Lafferty, GD Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lau, YP Lu, C Miftakov, V Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, M Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, J Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BABAR Collaboration TI Search for CP violation and a measurement of the relative branching fraction in D+ -> K-K+ pi(+) decays SO PHYSICAL REVIEW D LA English DT Article ID D-MESON DECAYS AB We report on a search for the CP asymmetry in the singly Cabibbo-suppressed decays D+-> K(-)K(+)pi(+) and in the resonant decays D+->phi pi(+) and D+->(K) over bar K-*0(+) based on a data sample of 79.9 fb(-1) recorded by the BABAR detector. We use the Cabibbo-favored D-s(+)-> K(-)K(+)pi(+) branching fraction as normalization in the measurements to reduce systematic uncertainties. The CP asymmetries obtained are A(CP)(K-K+ pi(+/-)) = (1.4 +/- 1.0(stat) +/- 0.8(syst)) x 10(-2), A(CP)(phi pi(+/-)) = (0.2 +/- 1.5(stat) +/- 0.6(syst)) x 10(-2), and A(CP)((K) over bar K-*0(+/-))=(0.9 +/- 1.7(stat) +/- 0.7(syst)) x 10(-2). The relative branching fraction Gamma(D+-> K(-)K(+)pi(+))/Gamma(D+ -> K(-)pi(+)pi(+)) is also measured and is found to be (10.7 +/- 0.1(stat) +/- 0.2(syst)) x 10(-2). C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, E-08193 Barcelona, Spain. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Univ Bari, 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, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. 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RI de Groot, Nicolo/A-2675-2009; Cavallo, Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Sarti, Alessio/I-2833-2012; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016 OI Saeed, Mohammad Alam/0000-0002-3529-9255; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240 NR 17 TC 13 Z9 13 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 PY 2005 VL 71 IS 9 AR 091101 DI 10.1103/PhysRevD.71.091101 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300001 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, 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R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, AE Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, 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Nicholson, H Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pennazzi, S Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Gioi, LL Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Wilson, FF Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Mohapatra, AK Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BABAR Collaboration TI Measurement of the B-0 -> D*- D-s(*+) and D-s(+)-> phi pi(+) branching fractions SO PHYSICAL REVIEW D LA English DT Article ID DECAYS AB We present measurements of the branching fractions B(B-0 -> D*- D-s(*+)) and B(D-s(+) -> phi pi(+)), based on 123 x 10(6) Upsilon(4S) -> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) B factory. A partial reconstruction technique is used to measure B(B-0 -> D*- D-s(*+)) and the decay chain is fully reconstructed to measure the branching fraction product B(B-0 -> D*- D-s(*+)) x B(D-s(+) -> phi pi(+)). Comparing these two measurements provides a model-independent determination of the D-s(+) -> phi pi(+) branching fraction. We obtain B(B-0 -> D*- D-s(*+)) = (1.88 +/- 0.09 +/- 0.17)% and B(D-s(+) -> phi pi(+)) = (4.81 +/- 0.52 +/- 0.38)%, where the first uncertainties are statistical and the second systematic. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. 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, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. 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Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 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, DSM, Dapina, 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. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. RP Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Cavallo, Nicola/F-8913-2012; Peters, Klaus/C-2728-2008; Roe, Natalie/A-8798-2012; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012 OI Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951 NR 14 TC 28 Z9 27 U1 0 U2 4 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 PY 2005 VL 71 IS 9 AR 091104 DI 10.1103/PhysRevD.71.091104 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300004 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, AE Blinov, VE Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Mohapatra, AK Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Diberder, FL Lepeltier, V Lutz, AM Petersen, TC Pierini, M Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Lodovico, FD Brown, CL Cowan, G Flack, RL Flaecher, HU Green, MG Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hodgkinson, MC Lafferty, GD Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lau, YP Lu, C Miftakov, V Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Gioi, LL Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T Groot, ND Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Nardo, GD Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, JM Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, AE Blinov, VE Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Mohapatra, AK Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Diberder, FL Lepeltier, V Lutz, AM Petersen, TC Pierini, M Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Lodovico, FD Brown, CL Cowan, G Flack, RL Flaecher, HU Green, MG Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hodgkinson, MC Lafferty, GD Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lau, YP Lu, C Miftakov, V Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Gioi, LL Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T Groot, ND Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Nardo, GD Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, JM Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BABAR Collaboration TI Measurement of CP asymmetries in B-0 ->phi K-0 and B-0 -> K+ K- K-s(0) decays SO PHYSICAL REVIEW D LA English DT Article ID B-MESON DECAYS; AMPLITUDE ANALYSIS; PENGUIN; VIOLATION; PHYSICS; SYSTEM AB We measure the time-dependent CP asymmetry parameters in B-0 -> K+ K- K-0 based on a data sample of approximately 227 x 10(6) B-meson pairs recorded at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. We reconstruct two-body B-0 decays to phi(1020)K-S(0) and phi(1020)K-L(0), and the three-body decay K+ K- K-S(0) with phi(1020)K-S(0) excluded. For the B-0 -> phi K-0 decays, we measure sin2 beta(eff)(phi K-0) = +0.50 +/- 0.25(stat)(-0.04)(+0.07)(syst). The B-0 -> K+ K- K-S(0) decays are dominated by K+ K- S wave, as determined from an angular analysis; we measure sin2 beta(eff)((K+K-KS0)) = +0.55 +/- 0.22(stat) +/- 0.04(syst) +/- 0.11(CP), where the last error is due to the uncertainty in the fraction of CP-even contributions to the decay amplitude. We find no evidence for direct CP violation. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Univ Bari, 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, Berkeley, CA 94720 USA. Lawrence Berkeley Natl 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 Riverside, Riverside, CA 92521 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Univ Genoa, Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. 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 72E, Merseyside, England. Univ London, 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. Univ Milan, 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 Fisiche, I-80126 Naples, Italy. Univ Naples Federico II, Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Ohio State Univ, Columbus, OH 43210 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, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scoula Normale Super, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 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, DSM, Dapina, 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. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Peters, Klaus/C-2728-2008; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016 OI Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240 NR 29 TC 39 Z9 39 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 PY 2005 VL 71 IS 9 AR 091102 DI 10.1103/PhysRevD.71.091102 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300002 ER PT J AU Bern, Z Dixon, LJ Kosower, DA AF Bern, Z Dixon, LJ Kosower, DA TI On-shell recurrence relations for one-loop QCD amplitudes SO PHYSICAL REVIEW D LA English DT Article ID GAUGE-THEORY AMPLITUDES; MULTI-GLUON SCATTERING; HELICITY AMPLITUDES; TWISTOR SPACE; COLLINEAR LIMITS; CROSS-SECTIONS; MHV VERTICES; YANG-MILLS; BREMSSTRAHLUNG; UNITARITY AB We present examples of on-shell recurrence relations for determining rational functions appearing in one-loop QCD amplitudes. In particular, we give relations for one-loop QCD amplitudes with all legs of positive helicity, or with one leg of negative helicity and the rest of positive helicity. Our recurrence relations are similar to the tree-level ones described by Britto, Cachazo, Feng, and Witten. A number of new features arise for loop amplitudes in nonsupersymmetric theories like QCD, including boundary terms and double poles. We show how to eliminate the boundary terms, which would interfere with obtaining useful relations. Using the relations we give compact explicit expressions for the n-gluon amplitudes with one negative-helicity gluon, up through n = 7. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France. RP Bern, Z (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. NR 81 TC 140 Z9 140 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 EI 1550-2368 J9 PHYS REV D JI Phys. Rev. D PD MAY PY 2005 VL 71 IS 10 AR 105013 DI 10.1103/PhysRevD.71.105013 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TQ UT WOS:000229440400087 ER PT J AU Cooper, F Dawson, JF Mihaila, B AF Cooper, F Dawson, JF Mihaila, B TI Renormalized broken-symmetry Schwinger-Dyson equations and the two-particle irreducible 1/N expansion for the O(N) model SO PHYSICAL REVIEW D LA English DT Article ID QUANTUM FIELD THEORY; EXPECTATION VALUE FORMALISM; SIGMA-MODEL; EQUILIBRIUM; FORMULATION; EVOLUTION; SYSTEM; 1-N; NLO AB We derive the renormalized Schwinger-Dyson equations for the one- and two-point functions in the auxiliary field formulation of Coleman, Jackiw, and Politzer [S. Coleman, R. Jackiw, and H. D. Politzer, Phys. Rev. D 10, 2491 (1974).] for lambda phi(4) field theory, to order 1/N, in the 2PI-1/N expansion. We show that the renormalization of the broken-symmetry theory depends only on the counter terms of the symmetric theory with phi = 0, as discussed in our previous paper [F. Cooper, B. Mihaila, and J. F.Dawson, Phys. Rev. D 70, 105008 (2004).]. We find that the 2PI-1/N expansion violates the Goldstone theorem at order 1/N. In using the O(4) model as a low energy effective field theory of pions to study the time evolution of disoriented chiral condensates one has to explicitly break the O(4) symmetry to give the physical pions a nonzero mass. In this effective theory, we expect that the additional small contribution to the pion mass due to the violation of the Goldstone theorem in the 2PI-1/N equations to be unimportant for an adequate description of the phenomenology. C1 Natl Sci Fdn, Div Phys, Arlington, VA 22230 USA. Santa Fe Inst, Santa Fe, NM 87501 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Natl Sci Fdn, Div Phys, 4201 Wilson Blvd, Arlington, VA 22230 USA. EM fcooper@nsf.gov; john.dawson@unh.edu; bmihaila@lanl.gov RI Mihaila, Bogdan/D-8795-2013 OI Mihaila, Bogdan/0000-0002-1489-8814 NR 39 TC 21 Z9 21 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 PY 2005 VL 71 IS 9 AR 096003 DI 10.1103/PhysRevD.71.096003 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300075 ER PT J AU Duncan, A Eichten, E Sedgewick, R AF Duncan, A Eichten, E Sedgewick, R TI Computing electromagnetic effects in fully unquenched QCD SO PHYSICAL REVIEW D LA English DT Article ID LATTICE QCD AB The inclusion of electromagnetic effects in unquenched QCD can be accomplished using ensembles generated in dynamical simulations with pure QCD provided the change in the quark determinant induced by a weak electromagnetic field can be efficiently computed. A stochastic technique for achieving this in the case of dynamical domain wall calculations is described. C1 Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. Fermilab Astrophys Ctr, Theory Grp, Batavia, IL 60510 USA. Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA. RP Duncan, A (reprint author), Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. NR 10 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN 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 PY 2005 VL 71 IS 9 AR 094509 DI 10.1103/PhysRevD.71.094509 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300057 ER PT J AU Golterman, M Sharpe, SR Singleton, RL AF Golterman, M Sharpe, SR Singleton, RL TI Effective theory for quenched lattice QCD and the Aoki phase SO PHYSICAL REVIEW D LA English DT Article ID CHIRAL PERTURBATION-THEORY; DIRAC OPERATOR; WILSON FERMIONS; U(1) PROBLEM; SPONTANEOUS BREAKING; CONFINING THEORIES; SYMMETRY-BREAKING; ZERO MODES; QUARKS; LOGARITHMS AB We discuss the symmetries of quenched QCD with Wilson fermions, starting from its Lagrangian formulation, taking into account the constraints needed for convergence of the ghost-quark functional integral. We construct the corresponding chiral effective Lagrangian, including terms linear and quadratic in the lattice spacing. This allows us to study the phase structure of the quenched theory, and compare it to that in the unquenched theory. In particular we study whether there may be an Aoki phase (with parity and flavor spontaneously broken) or a first-order transition line (with no symmetry breaking but meson masses proportional to the lattice spacing), which are the two possibilities in the unquenched theory. The presence of such phase structure, and the concomitant long-range correlations, has important implications for numerical studies using both quenched and dynamical overlap and domain-wall fermions. We argue that the phase structure is qualitatively the same as in the unquenched theory, with the choice between the two possibilities depending on the sign of a parameter in the low-energy effective theory. C1 San Francisco State Univ, Dept Phys & Astron, San Francisco, CA 94132 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. Los Alamos Natl Lab, Grp X7, Los Alamos, NM 87545 USA. RP San Francisco State Univ, Dept Phys & Astron, 1600 Holloway Ave, San Francisco, CA 94132 USA. EM maarten@stars.sfsu.edu; sharpe@phys.washington.edu; bobs1@lanl.gov NR 44 TC 23 Z9 23 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 PY 2005 VL 71 IS 9 AR 094503 DI 10.1103/PhysRevD.71.094503 PG 17 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300051 ER PT J AU Hicks, K Burkert, V Kudryavtsev, AE Strakovsky, II Stepanyan, S AF Hicks, K Burkert, V Kudryavtsev, AE Strakovsky, II Stepanyan, S TI Comment on "The evidence for a pentaquark signal and kinematic reflections" SO PHYSICAL REVIEW D LA English DT Letter C1 Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. George Washington Univ, Dept Phys, Ctr Nucl Studies, Washington, DC 20052 USA. RP Hicks, K (reprint author), Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA. NR 5 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 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD MAY PY 2005 VL 71 IS 9 AR 098501 DI 10.1103/PhysRevD.71.098501 PG 2 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300082 ER PT J AU Hoang, AH Ligeti, Z Luke, M AF Hoang, AH Ligeti, Z Luke, M TI Perturbative corrections to the determination of V-ub from the P+ spectrum in B -> X-u tv(-) SO PHYSICAL REVIEW D LA English DT Article ID SEMILEPTONIC B-DECAY; MESON DECAYS; PHOTON SPECTRUM; QCD CORRECTIONS; DISTRIBUTIONS; FACTORIZATION AB We investigate the relation between the E-gamma spectrum in B -> X-s gamma decay and the P+ spectrum in semileptonic B -> X(u)l (v) over bar decay (P+ is the hadronic energy minus the absolute value of the hadronic three-momentum), which provides in principle the theoretically simplest determination of vertical bar V-ub vertical bar from any of the "shape function regions" of B -> X(u)l (v) over bar spectra. We calculate analytically the P+ spectrum to order alpha(2)(s)beta(0), and study its relation to the B -> X-s gamma photon spectrum to eliminate the leading dependence on nonperturbative effects. We compare the result of fixed order perturbation theory to the next-to-leading log renormalization group improved calculation, and argue that fixed order perturbation theory is likely to be a more appropriate expansion. Implications for the perturbative uncertainties in the determination of vertical bar V-ub vertical bar from the P+ spectrum are discussed. C1 Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany. Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. RP Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, Fohringer Ring 6, D-80805 Munich, Germany. NR 44 TC 18 Z9 18 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY PY 2005 VL 71 IS 9 AR 093007 DI 10.1103/PhysRevD.71.093007 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300020 ER PT J AU Lee, WJ Bhattacharya, T Fleming, GT Gupta, R Kilcup, G Sharpe, SR AF Lee, WJ Bhattacharya, T Fleming, GT Gupta, R Kilcup, G Sharpe, SR TI Testing improved staggered fermions with m(s) and B-K SO PHYSICAL REVIEW D LA English DT Article ID CHIRAL PERTURBATION-THEORY; QUENCHED LATTICE QCD; MATRIX-ELEMENTS; PARAMETER; ALPHA(S); MESONS; MASSES; QUARK AB We study the improvement of staggered fermions using hypercubically smeared links. We calculate the strange quark mass and the kaon B parameter, B-K, in quenched QCD on a 16(3)x64 lattice at beta=6.0. We find m(s)((MS) over bar, 2 GeV)=101.2 +/- 1.3 +/- 4 MeV and B-K((MS) over bar, 2 GeV)=0.578 +/- 0.018 +/- 0.042, where the first error is from statistics and fitting, and the second from using one-loop matching factors. The scale (1/a=1.95 GeV) is set by M-rho, and m(s) is determined using the kaon mass. Comparing to quenched results obtained using unimproved staggered fermions and other discretizations, we argue that the size of discretization errors in B-K is substantially reduced by improvement. C1 Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Jefferson Lab, Newport News, VA 23606 USA. Ohio State Univ, Dept Phys, Columbus, OH USA. Univ Washington, Phys Dept, Seattle, WA 98195 USA. RP Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea. EM wlee@phya.snu.ac.kr; tanmoy@lanl.gov; flemingg@jlab.org; rajan@lanl.gov; kilcup@physics.ohio-state.edu; sharpe@phys.washington.edu RI Fleming, George/L-6614-2013; Bhattacharya, Tanmoy/J-8956-2013 OI Fleming, George/0000-0002-4987-7167; Bhattacharya, Tanmoy/0000-0002-1060-652X NR 31 TC 9 Z9 9 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 PY 2005 VL 71 IS 9 AR 094501 DI 10.1103/PhysRevD.71.094501 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300049 ER PT J AU Sibirtsev, A Meissner, UG Thomas, AW AF Sibirtsev, A Meissner, UG Thomas, AW TI Okubo-Zweig-Iizuka rule violation in photoproduction SO PHYSICAL REVIEW D LA English DT Article ID LARGE-MOMENTUM-TRANSFER; DISPERSION-THEORETICAL ANALYSIS; ELECTROMAGNETIC FORM-FACTORS; LOW-ENERGY PHOTOPRODUCTION; VECTOR-MESONS; PHI-PHOTOPRODUCTION; EXPERIMENTAL TESTS; POLARIZED PHOTONS; SCATTERING; PHYSICS AB We investigate OZI rule violation in omega and phi-meson photoproduction off nucleons. Data on the total cross sections indicate a large phi/omega ratio of about 0.8 at the maximal available photon energy that is in good agreement with expectations from QCD. On the other hand, data at large four-momentum transfer exhibit a ratio of about 0.07, showing that the perturbative QCD regime is not approached at vertical bar t vertical bar > 2 GeV2 and photon energies E-gamma < 4 GeV. The anomanously large phi/omega ratio at low energies, that is close to the reaction threshold, remains to be explained within nonperturbative QCD. C1 Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany. Forschungszentrum Julich, Inst Kernphys Theorie, D-52425 Julich, Germany. Jefferson Lab, Newport News, VA 23606 USA. RP Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, Nussallee 14-16, D-53115 Bonn, Germany. RI Thomas, Anthony/G-4194-2012 OI Thomas, Anthony/0000-0003-0026-499X NR 44 TC 10 Z9 10 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD MAY PY 2005 VL 71 IS 9 AR 094011 DI 10.1103/PhysRevD.71.094011 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930TP UT WOS:000229440300035 ER PT J AU Adib, AB AF Adib, AB TI Entropy and density of states from isoenergetic nonequilibrium processes SO PHYSICAL REVIEW E LA English DT Article ID FREE-ENERGY DIFFERENCES; DYNAMICAL-APPROACH; PHASE-TRANSITIONS; THERMODYNAMICS; SIMULATIONS; SYSTEMS AB Two identities in statistical mechanics involving entropy differences (or ratios of densities of states) at constant energy are derived. The first provides a nontrivial extension of the Jarzynski equality to the microcanonical ensemble [C. Jarzynski, Phys. Rev. Lett. 78, 2690 (1997)], which can be seen as a "fast-switching" version of the adiabatic switching method for computing entropies [M. Watanabe and W. P. Reinhardt, Phys. Rev. Lett. 65, 3301 (1990)]. The second is a thermodynamic integration formula analogous to a well-known expression for free energies, and follows after taking the quasistatic limit of the first. Both identities can be conveniently used in conjunction with a scaling relation (herein derived) that allows one to extrapolate measurements taken at a single energy to a wide range of energy values. Practical aspects of these identities in the context of numerical simulations are discussed. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Brown Univ, Dept Phys, Providence, RI 02912 USA. RP Adib, AB (reprint author), Los Alamos Natl Lab, Div Theoret, T-13,MS B213, Los Alamos, NM 87545 USA. EM artur@brown.edu NR 26 TC 18 Z9 18 U1 1 U2 6 PU AMERICAN 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 2005 VL 71 IS 5 AR 056128 DI 10.1103/PhysRevE.71.056128 PN 2 PG 5 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 961UW UT WOS:000231688300040 PM 16089623 ER PT J AU Aranson, IS Tsimring, LS AF Aranson, IS Tsimring, LS TI Pattern formation of microtubules and motors: Inelastic interaction of polar rods SO PHYSICAL REVIEW E LA English DT Article ID SELF-ORGANIZATION AB We derive a model describing spatiotemporal organization of an array of microtubules interacting via molecular motors. Starting from a stochastic model of inelastic polar rods with a generic anisotropic interaction kernel we obtain a set of equations for the local rods concentration and orientation. At large enough mean density of rods and concentration of motors, the model describes orientational instability. We demonstrate that the orientational instability leads to the formation of vortices and (for large density and/or kernel anisotropy) asters seen in recent experiments. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093 USA. RP Aranson, IS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Aranson, Igor/I-4060-2013 NR 16 TC 91 Z9 93 U1 1 U2 20 PU AMERICAN 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 2005 VL 71 IS 5 AR 050901 DI 10.1103/PhysRevE.71.050901 PN 1 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 961UQ UT WOS:000231687700006 PM 16089514 ER PT J AU Bastea, S AF Bastea, S TI Viscosity and mutual diffusion in strongly asymmetric binary ionic mixtures SO PHYSICAL REVIEW E LA English DT Article ID ONE-COMPONENT PLASMA; IGNITION TARGET DESIGNS; STATISTICAL-MECHANICS; MOLECULAR-DYNAMICS; TRANSPORT-COEFFICIENTS; SHEAR VISCOSITY; MATTER; INTERDIFFUSION; TRANSITION; STARS AB We present molecular dynamics simulation results for the viscosity and mutual diffusion constant of a strongly asymmetric binary ionic mixture (BIM). We compare the results with available theo- retical models previously tested for much smaller asymmetries. For the case of viscosity we propose a new predictive framework based on the linear mixing rule, while for mutual diffusion we discuss some consistency problems of widely used Boltzmann equation based models. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bastea, S (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. EM bastea2@llnl.gov NR 32 TC 38 Z9 38 U1 1 U2 11 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 2005 VL 71 IS 5 AR 056405 DI 10.1103/PhysRevE.71.056405 PN 2 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 961UW UT WOS:000231688300075 PM 16089658 ER PT J AU Chertkov, M Kolokolov, I Lebedev, V AF Chertkov, M Kolokolov, I Lebedev, V TI Effects of surface tension on immiscible Rayleigh-Taylor turbulence SO PHYSICAL REVIEW E LA English DT Article ID CAPILLARY WAVES; INSTABILITY; NUMBER; FIELD AB We present phenomenology describing the internal structure of a turbulent zone, produced as the result of the push of a heavy fluid into a light one, for the case of immiscible fluids. One finds that the Kolmogorov cascade is realized within a range that grows with time, viz., scales between the mixing zone width, L proportional to t(2), and the viscous scale, eta proportional to t(-1/4). Surface-tension effects lead to formation of an emulsionlike state. Density fluctuations on scales larger than the typical drop size, l, are governed by the Obukhov-Corrsin cascade. If l >>eta, a wave energy cascade, related to capillary waves propagating along the surfaces of drops, is formed at scales below l, l proportional to t(-2/5). C1 LANL, Div Theoret, T13, Los Alamos, NM 87545 USA. LANL, Div Theoret, CNLS, Los Alamos, NM 87545 USA. LD Landau Theoret Phys Inst, Moscow 119334, Russia. RP Chertkov, M (reprint author), LANL, Div Theoret, T13, Los Alamos, NM 87545 USA. RI Chertkov, Michael/O-8828-2015; OI Kolokolov, Igor/0000-0002-7961-8588 NR 29 TC 11 Z9 11 U1 0 U2 1 PU AMERICAN 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 2005 VL 71 IS 5 AR 055301 DI 10.1103/PhysRevE.71.055301 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 961UW UT WOS:000231688300007 PM 16089590 ER PT J AU Clark, DS Tabak, M AF Clark, DS Tabak, M TI Nonlinear Rayleigh-Taylor growth in converging geometry SO PHYSICAL REVIEW E LA English DT Article ID INSTABILITY; COMPRESSION AB The early nonlinear phase of Rayleigh-Taylor growth is typically described in terms of the classic Layzer model in which bubbles of light fluid rise into the heavy fluid at a constant rate determined by the bubble radius and the gravitational acceleration. However, this model is strictly valid only for planar interfaces and hence ignores any effects that might be introduced by the spherically converging interfaces of interest in inertial confinement fusion and various astrophysical phenomena. Here, a generalization of the Layzer nonlinear bubble rise rate is given for a self-similar spherically converging flow of the type studied by Kidder. A simple formula for the bubble amplitude is found showing that, while the bubble initially rises with a constant velocity similar to the Layzer result, during the late phase of the implosion, an acceleration of the bubble rise rate occurs. The bubble rise rate is verified by comparison with numerical hydrodynamics simulations. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Clark, DS (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM clark90@llnl.gov NR 8 TC 8 Z9 8 U1 1 U2 3 PU AMERICAN 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 2005 VL 71 IS 5 AR 055302 DI 10.1103/PhysRevE.71.055302 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 961UW UT WOS:000231688300008 PM 16089591 ER PT J AU Henestroza, E Eylon, S Roy, PK Yu, SS Bieniosek, FM Shuman, DB Waldron, WL AF Henestroza, E Eylon, S Roy, PK Yu, SS Bieniosek, FM Shuman, DB Waldron, WL TI Final focus system for high intensity beams SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB The neutralized transport experiment (NTX) at the Heavy Ion Fusion Virtual National Laboratory is exploring the performance of neutralized final-focus systems for high perveance heavy ion beams. The final-focus scenario in a heavy ion fusion driver consists of several large aperture quadrupole magnets followed by a drift section in which the beam space charge is neutralized by a plasma. This beam is required to hit a millimeter-sized target spot at the end of the drift section. The objective of the NTX experiments and associated theory and simulations is to study the various physical mechanisms that determine the final spot size (radius r(s)) at a given distance (f) from the end of the last quadrupole. In a fusion driver, f is the standoff distance required to keep the chamber wall and superconducting magnets properly protected. The NTX final quadrupole focusing system produces a converging beam at the entrance to the neutralized drift section where it focuses to a small spot. The final spot is determined by the conditions of the beam entering the quadrupole section, the beam dynamics in the magnetic lattice, and the plasma neutralization dynamics in the drift section. The main issues are the control of emittance growth due to high order fields from magnetic multipoles and image fields. In this paper, we will describe the theoretical and experimental aspects of the beam dynamics in the quadrupole lattice, and how these physical effects influence the final beam size. In particular, we present theoretical and experimental results on the dependence of final spot size on geometric aberrations and perveance. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Henestroza, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 12 TC 0 Z9 0 U1 0 U2 1 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 2005 VL 8 IS 5 AR 052801 DI 10.1103/PhysRevSTAB.8.052801 PG 15 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934AJ UT WOS:000229678600007 ER PT J AU Pozdeyev, E AF Pozdeyev, E TI Regenerative multipass beam breakup in two dimensions SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB In this paper, a formula, describing the threshold of regenerative multipass beam breakup (BBU) for a single dipole higher-order mode with arbitrary polarization in a two-pass accelerator with a general-form, 4 x 4 recirculation matrix, is derived. A new two-dimensional BBU code is also introduced. To illustrate specifics of the BBU in two dimensions, the formula is used to calculate the threshold in several cases including two-dimensional uncoupled optics, reflecting optics, and rotating optics. The analytical results are compared to results of simulations obtained with the new code. A mathematical relation between transfer matrices between cavities of the accelerating structure and recirculation matrices for each cavity, which must be satisfied in order to successfully suppress the BBU by reflection or rotation in several cavities, is presented. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Pozdeyev, E (reprint author), Thomas Jefferson Natl Accelerator Facil, 12000 Jefferson Ave, Newport News, VA 23606 USA. EM pozdeyev@jlab.org NR 11 TC 17 Z9 17 U1 0 U2 1 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 2005 VL 8 IS 5 AR 054401 DI 10.1103/PhysRevSTAB.8.054401 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934AJ UT WOS:000229678600009 ER PT J AU Stygar, WA Lott, JA Wagoner, TC Anaya, V Harjes, HC Ives, HC Wallace, ZR Mowrer, GR Shoup, RW Corley, JP Anderson, RA Vogtlin, GE Savage, ME Elizondo, JM Stoltzfus, BS Andercyk, DM Fehl, DL Jaramillo, TF Johnson, DL McDaniel, DH Muirhead, DA Radman, JM Ramirez, JJ Ramirez, LE Spielman, RB Struve, KW Walsh, DE Walsh, ED Walsh, MD AF Stygar, WA Lott, JA Wagoner, TC Anaya, V Harjes, HC Ives, HC Wallace, ZR Mowrer, GR Shoup, RW Corley, JP Anderson, RA Vogtlin, GE Savage, ME Elizondo, JM Stoltzfus, BS Andercyk, DM Fehl, DL Jaramillo, TF Johnson, DL McDaniel, DH Muirhead, DA Radman, JM Ramirez, JJ Ramirez, LE Spielman, RB Struve, KW Walsh, DE Walsh, ED Walsh, MD TI Improved design of a high-voltage vacuum-insulator interface SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID MAGNETIC INHIBITION; SURFACE FLASHOVER; PULSED FLASHOVER; TRIPLE JUNCTION; ELECTRIC-FIELD; GAPS AB We have conducted a series of experiments designed to measure the flashover strength of various azimuthally symmetric 45 degrees vacuum-insulator configurations. The principal objective of the experiments was to identify a configuration with a flashover strength greater than that of the standard design, which consists of a 45 degrees polymethyl-methacrylate (PMMA) insulator between flat electrodes. The thickness d and circumference C of the insulators tested were held constant at 4.318 and 95.74 cm, respectively. The peak voltage applied to the insulators ranged from 0.8 to 2.2 MV. The rise time of the voltage pulse was 40-60 ns; the effective pulse width [as defined in Phys. Rev. ST Accel. Beams 7, 070401 ( 2004)] was on the order of 10 ns. Experiments conducted with flat aluminum electrodes demonstrate that the flashover strength of a crosslinked polystyrene (Rexolite) insulator is (18 +/- 7)% higher than that of PMMA. Experiments conducted with a Rexolite insulator and an anode plug, i.e., an extension of the anode into the insulator, demonstrate that a plug can increase the flashover strength by an additional (44 +/- 11)%. The results are consistent with the Anderson model of anode-initiated flashover, and confirm previous measurements. It appears that a Rexolite insulator with an anode plug can, in principle, increase the peak electromagnetic power that can be transmitted across a vacuum interface by a factor of [(1.18) x (1.44])(2) = 2.9 over that which can be achieved with the standard design. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Ktech Corp Inc, Albuquerque, NM 87123 USA. EG&G, Albuquerque, NM 87107 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Trace Labs, Hunt Valley, MD 21030 USA. Titan Pulse Sci Div, San Leandro, CA 94577 USA. C Lec Plast, Philadelphia, PA 19135 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 61 TC 46 Z9 53 U1 0 U2 11 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 2005 VL 8 IS 5 AR 050401 DI 10.1103/PhysRevSTAB.8.050401 PG 16 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934AJ UT WOS:000229678600002 ER PT J AU Trbojevic, D Courant, ED Blaskiewicz, M AF Trbojevic, D Courant, ED Blaskiewicz, M TI Design of a nonscaling fixed field alternating gradient accelerator SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID FFAGS AB present a design of nonscaling fixed field alternating gradient accelerators (FFAG) minimizing the dispersion action function H. The design is considered both analytically and via computer modeling. We present the basic principles of a nonscaling FFAG lattice and discuss optimization strategies so that one can accelerate over a broad range of momentum with reasonable apertures. Acceleration schemes for muons are discussed. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Trbojevic, D (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM dejan@bnl.gov NR 35 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 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAY PY 2005 VL 8 IS 5 AR 050101 DI 10.1103/PhysRevSTAB.8.050101 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934AJ UT WOS:000229678600001 ER PT J AU Zholents, AA Penn, G AF Zholents, AA Penn, G TI Obtaining attosecond x-ray pulses using a self-amplified spontaneous emission free electron laser SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID PARAMETRIC-AMPLIFIER; PHASE; FEL; OSCILLATOR; GAIN AB We describe a technique for the generation of a solitary attosecond x-ray pulse in a free-electron laser (FEL), via a process of self-amplified spontaneous emission. In this method, electrons experience an energy modulation upon interacting with laser pulses having a duration of a few cycles within single-period wiggler magnets. Two consecutive modulation sections, followed by compression in a dispersive section, are used to obtain a single, subfemtosecond spike in the electron peak current. This region of the electron beam experiences an enhanced growth rate for FEL amplification. After propagation through a long undulator, this current spike emits a similar to 250 attosecond x-ray pulse whose intensity dominates the x-ray emission from the rest of the electron bunch. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Zholents, AA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 20 TC 66 Z9 66 U1 0 U2 7 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 2005 VL 8 IS 5 AR 050704 DI 10.1103/PhysRevSTAB.8.050704 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934AJ UT WOS:000229678600006 ER PT J AU Zholents, AA AF Zholents, AA TI Laser assisted electron beam conditioning for free electron lasers SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID FEL AB A new method for electron beam conditioning in free electron lasers is proposed. It uses the electron beam interaction with a laser light in two wiggler magnets separated by a strong-focusing channel. The effect of the conditioning is illustrated by the example of a hypothetical single-pass, high-gain free electron laser operating in the self-amplified spontaneous emission mode with the x-ray emission at lambda(x) = 1.5 angstrom. The proposed conditioner is relatively compact and can be used as a practical add-on device to short x-ray wavelength free electron lasers. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Zholents, AA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 13 TC 3 Z9 3 U1 0 U2 1 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 2005 VL 8 IS 5 AR 050701 DI 10.1103/PhysRevSTAB.8.050701 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934AJ UT WOS:000229678600003 ER PT J AU Wang, F Ping, JL Qing, D Goldman, T AF Wang, F Ping, JL Qing, D Goldman, T TI Multiquark states SO PHYSICS OF ATOMIC NUCLEI LA English DT Article ID COLOR-SCREENING MODEL; NUCLEON-NUCLEON-SCATTERING; CONSTITUENT QUARK-MODEL; POSITIVE-STRANGENESS; BARYON SPECTRUM; DELOCALIZATION; DIBARYONS; RESONANCE; THETA(+); SYSTEMS AB The pentaquark state recently discovered has been discussed based on various quark model calculations. Odd parity for the state cannot be ruled out theoretically because the contributions related to nontrivial color structures have not been studied completely. Other multiquark states, especially dibaryons, have been discussed also. A strangeness -3 N Omega dibaryon has been shown to have a width as small as 12-22 keV and should be detectable in Omega-high-productivity reactions such as at RHIC, COMPAS, and the planned JHF and FAIR projects. (c) 2005 Pleiades Publishing, Inc. C1 Nanjing Univ, Dept Phys, Nanjing 210008, Peoples R China. Nanjing Univ, Ctr Theoret Phys, Nanjing 210008, Peoples R China. Shandong Univ, Sch Phys & Microelect, Jinan 250100, Peoples R China. Nanjing Normal Univ, Dept Phys, Nanjing, Peoples R China. CERN, Geneva, Switzerland. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA. RP Nanjing Univ, Dept Phys, Nanjing 210008, Peoples R China. NR 82 TC 1 Z9 1 U1 0 U2 1 PU MAIK NAUKA/INTERPERIODICA/SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 1063-7788 EI 1562-692X J9 PHYS ATOM NUCL+ JI Phys. Atom. Nuclei PD MAY PY 2005 VL 68 IS 5 BP 808 EP 813 DI 10.1134/1.1935013 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 936OJ UT WOS:000229865000007 ER PT J AU Savkli, C Gross, F Tjon, J AF Savkli, C Gross, F Tjon, J TI Nonperturbative dynamics of scalar field theories through the Feynman-Schwinger representation SO PHYSICS OF ATOMIC NUCLEI LA English DT Article ID POLARON VARIATIONAL-METHODS; BETHE-SALPETER-EQUATION; BOUND-STATES; PARTICLE REPRESENTATION; INTEGRAL EQUATIONS; 2-BODY EQUATIONS; FORMALISM; COVARIANT; MODEL; SCATTERING AB We present a summary of results obtained for scalar field theories using the Feynman-Schwinger (FSR) approach. Specifically, scalar QED and X2O theories are considered. The motivation behind the applications discussed in this paper is to use the FSR method as a rigorous tool for testing the quality of commonly used approximations in field theory. Exact calculations in a quenched theory are presented for one-, two-, and three-body bound states. Results obtained indicate that some of the commonly used approximations, such as Bethe-Salpeter ladder summation for bound states and the rainbow summation for one-body problems, produce significantly different results from those obtained from the FSR approach. We find that more accurate results can be obtained using other, simpler, approximation schemes. (c) 2005 Pleiades Publishing, Inc. C1 Lockheed Martin Space Operat, Greenbelt, MD USA. Jefferson Lab, Newport News, VA USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. RP Lockheed Martin Space Operat, Greenbelt, MD USA. NR 40 TC 12 Z9 12 U1 0 U2 2 PU MAIK NAUKA/INTERPERIODICA/SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 1063-7788 EI 1562-692X J9 PHYS ATOM NUCL+ JI Phys. Atom. Nuclei PD MAY PY 2005 VL 68 IS 5 BP 842 EP 860 DI 10.1134/1.1935017 PG 19 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 936OJ UT WOS:000229865000011 ER PT J AU Fabijonas, BR Holm, DD AF Fabijonas, BR Holm, DD TI Elliptic instability in the Lagrangian-averaged Euler-Boussinesq-alpha equations SO PHYSICS OF FLUIDS LA English DT Article ID 3-DIMENSIONAL INSTABILITY; STRAINED VORTICES; FLUID; TURBULENCE; FLOWS; STABILITY; MODELS; WAVES AB We examine the effects of turbulence on elliptic instability of rotating stratified incompressible flows, in the context of the Lagrangian-averaged Euler-Boussinesq-alpha (LAEB-alpha) model of turbulence. We find that the LAEB-alpha model alters the instability in a variety of ways for fixed Rossby number and Brunt-Vaisala frequency. First, it alters the location of the instability domains in the (gamma,cos theta)-parameter plane, where theta is the angle of incidence the Kelvin wave makes with the axis of rotation and gamma is the eccentricity of the elliptic flow, as well as the size of the associated Lyapunov exponent. Second, the model shrinks the width of one instability band while simultaneously increasing another. Third, the model introduces bands of unstable eccentric flows when the Kelvin wave is two dimensional. We introduce two similarity variables-one is a ratio of the Brunt-Vaisala frequency to the model parameter Upsilon(0)=1+alpha(2)beta(2) and the other is the ratio of the adjusted inverse Rossby number to the same model parameter. Here, alpha is the turbulence correlation length and beta is the Kelvin wave number. We show that by adjusting the Rossby number and Brunt-Vaisala frequency so that the similarity variables remain constant for a given value of Upsilon(0), turbulence has little effect on elliptic instability for small eccentricities (parallel to gamma parallel to < 1). For moderate and large eccentricities, however, we see drastic changes of the unstable Arnold tongues due to the LAEB-alpha model. Additionally, we find that introducing anisotropy in the vertical component of the transported velocity field merely alters the definition of the model parameter Upsilon(0), which effectively reduces the original parameter value. When the similarity variables are viewed with the new definition, the results are similar to those for the isotropic case. (c) 2005 American Institute of Physics. C1 So Methodist Univ, Dept Math, Dallas, TX 75275 USA. Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA. Univ London Imperial Coll Sci & Technol, Dept Math, London SW7 2AZ, England. RP Fabijonas, BR (reprint author), So Methodist Univ, Dept Math, Dallas, TX 75275 USA. NR 25 TC 0 Z9 0 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 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD MAY PY 2005 VL 17 IS 5 AR 054113 DI 10.1063/1.1897006 PG 14 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 925SN UT WOS:000229073700029 ER PT J AU George, E Glimm, J AF George, E Glimm, J TI Self-similarity of Rayleigh-Taylor mixing rates SO PHYSICS OF FLUIDS LA English DT Article ID PARALLEL COMPUTATION; COMPRESSIBLE FLUIDS; INSTABILITY; TRACKING AB We establish a renormalized self-similar scaling law for fluid mixing in the deeply compressible regime. Compressibility introduces a new length scale into the mixing but our time dependent analysis of the density contrast largely removes the effects of this length scale, so that self-similarity is maintained. Dynamically induced density changes lead to a dynamic Atwood number to measure density contrasts. We improve previous density renormalizations to allow a unified treatment of mass diffusion and compressible density stratification in a range of weakly to strongly compressible three-dimensional multimode Rayleigh-Taylor simulations. Some of these simulations use front tracking to prevent numerical interfacial mass diffusion, while the others are untracked and diffusive. Using the dynamic Atwood number A(t) as opposed to the customary t=0 Atwood number A=A(t=0) to define growth rate constants, approximate universality of the mixing rate constant alpha(b) is obtained at low compressibility. Furthermore, earlier results giving consistent simulation, experiment and theory for nearly incompressible mixing, are now extended to show renormalized self-similar scaling with increases in the mixing rates for simulations of highly compressible mixing. The renormalized (i.e., dynamic Atwood number corrected) mixing rates of the diffusive and nondiffusive simulations agree, and show very similar compressibility dependence, with self-similar mixing rates tripling as compressibility becomes strong. (c) 2005 American Institute of Physics. C1 SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Ctr Comp Sci, Upton, NY 11973 USA. RP George, E (reprint author), SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. NR 23 TC 22 Z9 22 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 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD MAY PY 2005 VL 17 IS 5 AR 054101 DI 10.1063/1.1890426 PG 13 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 925SN UT WOS:000229073700017 ER PT J AU Gogte, S Vorobieff, P Truesdell, R Mammoli, A van Swol, F Shah, P Brinker, CJ AF Gogte, S Vorobieff, P Truesdell, R Mammoli, A van Swol, F Shah, P Brinker, CJ TI Effective slip on textured superhydrophobic surfaces SO PHYSICS OF FLUIDS LA English DT Letter ID MICROCHANNELS; PRESSURE AB We study fluid flow in the vicinity of textured and superhydrophobically coated surfaces with characteristic texture sizes on the order of 10 mu m. Both for droplets moving down an inclined surface and for an external flow near the surface (hydrofoil), there is evidence of appreciable drag reduction in the presence of surface texture combined with superhydrophobic coating. On textured inclined surfaces, the drops roll faster than on a coated untextured surface at the same angle. The highest drop velocities are achieved on surfaces with irregular textures with characteristic feature size similar to 8 mu m. Application of the same texture and coating to the surface of a hydrofoil in a water tunnel results in drag reduction on the order of 10% or higher. This behavior is explained by the reduction of the contact area between the surface and the fluid, which can be interpreted in terms of changing the macroscopic boundary condition to allow nonzero slip velocity. (c) 2005 American Institute of Physics. C1 Univ New Mexico, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Gogte, S (reprint author), Univ New Mexico, Albuquerque, NM 87131 USA. RI Vorobieff, Peter/B-3376-2011; OI Vorobieff, Peter/0000-0003-0631-7263 NR 13 TC 125 Z9 130 U1 4 U2 42 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-6631 EI 1089-7666 J9 PHYS FLUIDS JI Phys. Fluids PD MAY PY 2005 VL 17 IS 5 AR 051701 DI 10.1063/1.1896405 PG 4 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 925SN UT WOS:000229073700001 ER PT J AU Hurricane, OA AF Hurricane, OA TI Layzer type models for pressure driven shells SO PHYSICS OF FLUIDS LA English DT Article ID RAYLEIGH-TAYLOR; INSTABILITY AB Models for the nonlinear instability of finite thickness shells driven by pressure are constructed in the style of Layzer. Equations for both Cartesian and cylindrically convergent/divergent geometries are derived. The resulting equations are appropriate for incompressible shells with unity Atwood number. Predictions from the equations compare well with two-dimensional simulations. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Hurricane, OA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 5 TC 3 Z9 3 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 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD MAY PY 2005 VL 17 IS 5 AR 058103 DI 10.1063/1.1921948 PG 4 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 925SN UT WOS:000229073700053 ER PT J AU Basse, NP Edlund, EM Ernst, DR Fiore, CL Greenwald, MJ Hubbard, AE Hughes, JW Irby, JH Lin, L Lin, Y Marmar, ES Mossessian, DA Porkolab, M Rice, JE Snipes, JA Stillerman, JA Terry, JL Wolfe, SM Wukitch, SJ Zhurovich, K Kramer, GJ Mikkelsen, DR AF Basse, NP Edlund, EM Ernst, DR Fiore, CL Greenwald, MJ Hubbard, AE Hughes, JW Irby, JH Lin, L Lin, Y Marmar, ES Mossessian, DA Porkolab, M Rice, JE Snipes, JA Stillerman, JA Terry, JL Wolfe, SM Wukitch, SJ Zhurovich, K Kramer, GJ Mikkelsen, DR TI Characterization of core and edge turbulence in L- and enhanced D-alpha H-mode Alcator C-Mod plasmas SO PHYSICS OF PLASMAS LA English DT Article ID WENDELSTEIN 7-AS PLASMAS; FULL-WAVE SIMULATION; TORE-SUPRA TOKAMAK; DENSITY-FLUCTUATIONS; SPATIAL-DISTRIBUTION; CONFINEMENT; SCATTERING; TRANSPORT; REFLECTOMETRY; STELLARATOR AB The recently upgraded phase-contrast imaging (PCI) diagnostic is used to characterize the transition from the low (L) to the enhanced D-alpha (EDA) high (H) confinement mode in Alcator C-Mod [I. H. Hutchinson, R. Boivin, F. Bombarda , Phys. Plasmas 1, 1511 (1994)] plasmas. PCI yields information on line integrated density fluctuations along vertical chords. The number of channels has been increased from 12 to 32 and the sampling rate from 1 MHz to 10 MHz. This expansion of diagnostic capabilities is used to study broadband turbulence in L and EDA H mode and to analyze the quasicoherent (QC) mode associated with EDA H mode. Changes in broadband turbulence at the transition from L to EDA H mode can be interpreted as an effect of the Doppler rotation of the bulk plasma. Additional fluctuation measurements of D-alpha light and the poloidal magnetic field show features correlated with PCI in two different frequency ranges at the transition. The backtransition from EDA H to L mode, the so-called enhanced neutron (EN) mode, is investigated by new high frequency (132 and 140 GHz) reflectometer channels operating in the ordinary (O) mode. This additional hardware has been installed in an effort to study localized turbulence associated with internal transport barriers (ITBs). The EN mode is a suitable candidate for this study, since an ITB exists transiently as the outer density decreases much faster than the core density in this mode. The fact that the density decays from the outside inward allows us to study fluctuations progressing towards the plasma core. Our results mark the first localized observation of the QC mode at medium density: 2.2x10(20) m(-3) (132 GHz). Correlating the reflectometry measurements with other fluctuating quantities provides some insight regarding the causality of the EN-mode development. (c) 2005 American Institute of Physics. C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM basse@psfc.mit.edu RI Lin, Yijun/B-5711-2009; Ernst, Darin/A-1487-2010; Lin, Liang/H-2255-2011; OI Ernst, Darin/0000-0002-9577-2809; Basse, Nils/0000-0002-4513-8869 NR 52 TC 12 Z9 12 U1 2 U2 5 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 2005 VL 12 IS 5 AR 052512 DI 10.1063/1.1899161 PG 14 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200056 ER PT J AU Baylor, LR Combs, SK Jernigan, TC Houlberg, WA Owen, LW Rasmussen, DA Maruyama, S Parks, PB AF Baylor, LR Combs, SK Jernigan, TC Houlberg, WA Owen, LW Rasmussen, DA Maruyama, S Parks, PB TI Pellet fueling technology development leading to efficient fueling of ITER burning plasmas SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID DIII-D TOKAMAK; HYDROGEN-PELLET; REACTOR-SCALE; INJECTION; ABLATION; SYSTEM; CLOUD AB Pellet injection is the primary fueling technique planned for core fueling of ITER [ITER Technical Basis 2002 ITER EDA Documentation Series (Vienna: IAEA)] burning plasmas. Efficient core plasma fueling with deuterium and tritium D-T is a requirement for achieving high fusion gain and it cannot be achieved with gas fueling. Injection of pellets from the inner wall has been shown on present day tokamarks to provide efficient fueling and is planned for use on ITER. Modeling of the fueling deposition from inner wall pellet injection using the Parks ExB drift model indicates that pellets have the capability to fuel well inside the separatrix. Gas fueling calculations show very poor neutral penetration due to the high density and wide scrape off layer. Isotopically mixed D-T pellets can provide efficient tritium fueling that will minimize tritium wall loading when compared to gas puffing. Currently the performance of the ITER inner wall guide tube design is under test with initial results indicating that pellet speeds in excess of 300 m/s will lead to fragmented pellets. The ITER pellet injection technology requirements and remaining development issues are discussed along with a plan to reach the design goal for employment on ITER. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. ITER Int Team, Garching, Germany. Gen Atom Co, San Diego, CA USA. RP Baylor, LR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 29 TC 11 Z9 12 U1 3 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 2005 VL 12 IS 5 AR 056103 DI 10.1063/1.1865052 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200105 ER PT J AU Biewer, TM Bell, RE Diem, SJ Phillips, CK Wilson, JR Ryan, PM AF Biewer, TM Bell, RE Diem, SJ Phillips, CK Wilson, JR Ryan, PM TI Edge ion heating by launched high harmonic fast waves in the National Spherical Torus Experiment SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID CYCLOTRON FREQUENCY-RANGE; ALCATOR-C-MOD; PARAMETRIC DECAY; TOKAMAK; ABSORPTION; PLASMAS AB A new spectroscopic diagnostic on the National Spherical Torus Experiment (NSTX) [J. Spitzer, M. Ono, M. Peng, D. Bashore, T. Bigelow, A. Brooks, J. Chrzanowaki, H. M. Fan, P. Heitzenroeder, T. Jarboe , Fusion Technol2. 30, 1337 (1996)] measures the velocity distribution of ions in the plasma edge simultaneously along both poloidal and toroidal views. An anisotropic ion temperature is measured during high power high harmonic fast wave (HHFW) rf heating in helium plasmas, with the poloidal ion temperature roughly twice the toroidal ion temperature. Moreover, the measured spectral distribution suggests that two populations of ions are present and have temperatures of typically 500 eV and 50 eV with rotation velocities of -50 km/s and -10 km/s, respectively (predominantly perpendicular to the local magnetic field). This bimodal distribution is observed in both the toroidal and poloidal views (for both He+ and C2+ ions), and is well correlated with the period of rf power application to the plasma. The temperature of the hot component is observed to increase with the applied rf power, which was scanned between 0 and 4.3 MW. The 30 MHz HHFW launched by the NSTX antenna is expected and observed to heat core electrons, but plasma ions do not resonate with the launched wave, which is typically at > 10th harmonic of the ion cyclotron frequency in the region of observation. A likely ion heating mechanism is parametric decay of the launched HHFW into an ion Bernstein wave (IBW). The presence of the IBW in NSTX plasmas during HHFW application has been directly confirmed with probe measurements. IBW heating occurs in the perpendicular ion distribution, consistent with the toroidal and poloidal observations. Calculations of IBW propagation indicate that multiple waves could be created in the parametric decay process, and that most of the IBW power would be absorbed in the outer 10-20 cm of the plasma, predominantly on fully stripped ions. These predictions are in qualitative agreement with the observations and must be accounted for when calculating the energy budget of the plasma. (c) 2005 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM tbiewer@pppl.gov NR 29 TC 23 Z9 23 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 2005 VL 12 IS 5 AR 056108 DI 10.1063/1.1871953 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200110 ER PT J AU Blue, BE Robey, HF Glendinning, SG Bono, MJ Burkhart, SC Celeste, JR Coker, RF Costa, RL Dixit, SN Foster, JM Hansen, JF Haynam, CA Hermann, MR Holder, JP Hsing, WW Kalantar, DH Lanier, NE Latray, DA Louis, H MacGowan, BJ Maggelssen, GR Marshall, CD Moses, EI Nikitin, AJ O'Brien, DW Perry, TS Poole, MW Rekow, VV Rosen, PA Schneider, MB Stry, PE Van Wonterghem, BM Wallace, R Weber, SV Wilde, BH Woods, DT Young, BK AF Blue, BE Robey, HF Glendinning, SG Bono, MJ Burkhart, SC Celeste, JR Coker, RF Costa, RL Dixit, SN Foster, JM Hansen, JF Haynam, CA Hermann, MR Holder, JP Hsing, WW Kalantar, DH Lanier, NE Latray, DA Louis, H MacGowan, BJ Maggelssen, GR Marshall, CD Moses, EI Nikitin, AJ O'Brien, DW Perry, TS Poole, MW Rekow, VV Rosen, PA Schneider, MB Stry, PE Van Wonterghem, BM Wallace, R Weber, SV Wilde, BH Woods, DT Young, BK TI Three-dimensional hydrodynamic experiments on the National Ignition Facility SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID INERTIAL CONFINEMENT; RAY; TARGETS; SCHEME AB The production of supersonic jets of material via the interaction of a strong shock wave with a spatially localized density perturbation is a common feature of inertial confinement fusion and astrophysics. The behavior of two-dimensional (2D) supersonic jets has previously been investigated in detail [J. M. Foster, B. H. Wilde, P. A. Rosen, T. S. Perry, M. Fell, M. J. Edwards, B. F. Lasinski, R. E. Turner, and M. L. Gittings, Phys. Plasmas 9, 2251 (2002)]. In three dimensions (3D), however, there are new aspects to the behavior of supersonic jets in compressible media. In this paper, the commissioning activities on the National Ignition Facility (NIF) [J. A. Paisner, J. D. Boyes, S. A. Kumpan, W. H. Lowdermilk, and M. Sorem, Laser Focus World 30, 75 (1994)] to enable hydrodynamic experiments will be presented as well as the results from the first series of hydrodynamic experiments. In these experiments, two of the first four beams of NIF are used to drive a 40 Mbar shock wave into millimeter scale aluminum targets backed by 100 mg/cc carbon aerogel foam. The remaining beams are delayed in time and are used to provide a point-projection x-ray backlighter source for diagnosing the three-dimensional structure of the jet evolution resulting from a variety of 2D and 3D features. Comparisons between data and simulations using several codes will be presented. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. AWE Aldermaston, Reading RG7 4PR, Berks, England. RP Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Perry, Theodore/K-3333-2014 OI Perry, Theodore/0000-0002-8832-2033 NR 25 TC 16 Z9 21 U1 0 U2 5 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 2005 VL 12 IS 5 AR 056313 DI 10.1063/1.1898226 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200142 ER PT J AU Burrell, KH West, WP Doyle, EJ Austin, ME Casper, TA Gohil, P Greenfield, CM Groebner, RJ Hyatt, AW Jayakumar, RJ Kaplan, DH Lao, LL Leonard, AW Makowski, MA McKee, GR Osborne, TH Snyder, PB Solomon, WM Thomas, DM Rhodes, TL Strait, EJ Wade, MR Wang, G Zeng, L AF Burrell, KH West, WP Doyle, EJ Austin, ME Casper, TA Gohil, P Greenfield, CM Groebner, RJ Hyatt, AW Jayakumar, RJ Kaplan, DH Lao, LL Leonard, AW Makowski, MA McKee, GR Osborne, TH Snyder, PB Solomon, WM Thomas, DM Rhodes, TL Strait, EJ Wade, MR Wang, G Zeng, L TI Advances in understanding quiescent H-mode plasmas in DIII-D SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID DOUBLE-BARRIER REGIME; D TOKAMAK; ASDEX UPGRADE; QH-MODE; CONFINEMENT; PEDESTAL; ENERGY AB Recent QH-mode research on DIII-D [J. L. Luxon , Plasma Physics and Controlled Nuclear Fusion Research 1996 (International Atomic Energy Agency, Vienna, 1987), Vol. I, p. 159] has used the peeling-ballooning modes model of edge magnetohydrodynamic stability as a working hypothesis to organize the data; several predictions of this theory are consistent with the experimental results. Current ramping results indicate that QH modes operate near the edge current limit set by peeling modes. This operating point explains why QH mode is easier to get at lower plasma currents. Power scans have shown a saturation of edge pressure with increasing power input. This allows QH-mode plasmas to remain stable to edge localized modes (ELMs) to the highest powers used in DIII-D. At present, the mechanism for this saturation is unknown; if the edge harmonic oscillation (EHO) is playing a role here, the physics is not a simple amplitude dependence. The increase in edge stability with plasma triangularity predicted by the peeling-ballooning theory is consistent with the substantial improvement in pedestal pressure achieved by changing the plasma shape from a single null divertor to a high triangularity double null. Detailed ELITE calculations for the high triangularity plasmas have demonstrated that the plasma operating point is marginally stable to peeling-ballooning modes. Comparison of ELMing, coinjected and quiescent, counterinjected discharges with the same shape, current, toroidal field, electron density, and electron temperature indicates that the edge radial electric field or the edge toroidal rotation are also playing a role in edge stability. The EHO produces electron, main ion, and impurity particle transport at the plasma edge which is more rapid than that produced by ELMs under similar conditions. The EHO also decreases the edge rotation while producing little change in the edge electron and ion temperatures. Other edge electromagnetic modes also produce particle transport; this includes the incoherent, broadband activity seen at high triangularity. Pedestal values of nu(*) and beta(T) bracketing, those required for International Experimental Thermonuclear Reactor [Nucl. Fusion 39, 2137 (1999)] have been achieved in DIII-D, demonstrating the QH-mode edge densities are sufficient for future devices. (c) 2005 American Institute of Physics. C1 Gen Atom Co, San Diego, CA 92186 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Texas, Austin, TX 78712 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Wisconsin, Madison, WI 53706 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Gen Atom Co, POB 85608, San Diego, CA 92186 USA. OI Solomon, Wayne/0000-0002-0902-9876 NR 29 TC 63 Z9 63 U1 3 U2 12 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 2005 VL 12 IS 5 AR 056121 DI 10.1063/1.1894745 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200123 ER PT J AU Cohen, BI Divol, L Langdon, AB Williams, EA AF Cohen, BI Divol, L Langdon, AB Williams, EA TI Saturation of stimulated Brillouin backscattering in two-dimensional kinetic ion simulations SO PHYSICS OF PLASMAS LA English DT Article ID DRIVEN PARAMETRIC-INSTABILITIES; IN-CELL SIMULATIONS; NONLINEAR SATURATION; THOMSON SCATTERING; LASER-BEAM; PLASMA; WAVES; RAMAN AB Two-dimensional simulations with a hybrid code (kinetic particle ions and Boltzmann fluid electrons) have been used to investigate the saturation of stimulated Brillouin backscatter (SBBS) instability. The simulations address the interplay of wave breaking and ion trapping (and the associated nonlinear frequency shift of the ion wave and nonlinear modification of the kinetic dissipation), two-ion-wave decay instability, harmonic generation, and pump depletion in affecting SBBS saturation as a function of the population of resonant ions, which is controlled by ZT(e)/T-i in a single ion species plasma (Z is the ion charge state and T-e,T-i are the electron and ion temperatures). The role of ponderomotive filamentation in these simulations is also examined. The peak SBBS reflectivities in two dimensions relax to values that are much less than in one dimension. Two-dimensional physics facilitates higher ion wave dissipation rates (including significant residual ion Landau damping) that account for the relaxation and suppression of SBBS. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. NR 34 TC 25 Z9 25 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 2005 VL 12 IS 5 AR 052703 DI 10.1063/1.1878792 PG 15 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200065 ER PT J AU Cohen, BI Hooper, EB Cohen, RH Hill, DN McLean, HS Wood, RD Woodruff, S Sovinec, CR Cone, GA AF Cohen, BI Hooper, EB Cohen, RH Hill, DN McLean, HS Wood, RD Woodruff, S Sovinec, CR Cone, GA TI Simulation of spheromak evolution and energy confinement SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID PLASMA; SUSTAINMENT AB Simulation results are presented that illustrate the formation and decay of a spheromak plasma driven by a coaxial electrostatic plasma gun, and model the plasma energy confinement. The physics of magnetic reconnection during formation is also illuminated. The simulations are performed with the three-dimensional, time-dependent, resistive magnetohydrodynamic NIMROD code [C. R. Sovinec, A. H. Glasser, T. A. Gianakon, D. C. Barnes, R. A. Nebel, S. E. Kruger, D. D. Schnack, S. J. Plimpton, A. Tarditi, and M. S. Chu, J. Comput. Phys. 195, 355 (2004)]. The simulation results are compared to data from the Sustained Spheromak Physics Experiment (SSPX) [E. B. Hooper, L. D. Pearlstein, and R. H. Bulmer, Nucl. Fusion 39, 863 (1999)]. The simulation results are tracking SSPX with increasing fidelity (e.g., improved agreement with measured magnetic fields, fluctuation amplitudes, and electron temperature) as the simulation has been improved in its representations of the experimental geometry, the magnetic bias coils, and the detailed time dependence of the current source driving the plasma gun, and uses realistic parameters. The simulations confirm that controlling the magnetic fluctuations is influenced by the current drive history and by matching the gun current in sustainment approximately to the value corresponding to the eigenvalue in the flux-conserver for the parallel current in a force-free equilibrium. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. RP Cohen, BI (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 18 TC 23 Z9 23 U1 1 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 2005 VL 12 IS 5 AR 056106 DI 10.1063/1.1869501 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200108 ER PT J AU Cohen, RH Friedman, A Covo, MK Lund, SM Molvik, AW Bieniosek, FM Seidl, PA Vay, JL Stoltz, P Veitzer, S AF Cohen, RH Friedman, A Covo, MK Lund, SM Molvik, AW Bieniosek, FM Seidl, PA Vay, JL Stoltz, P Veitzer, S TI Simulating electron clouds in heavy-ion accelerators SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc AB Contaminating clouds of electrons are a concern for most accelerators of positively charged particles, but there are some unique aspects of heavy-ion accelerators for fusion and high-energy density physics which make modeling such clouds especially challenging. In particular, self-consistent electron and ion simulation is required, including a particle advance scheme which can follow electrons in regions where electrons are strongly magnetized, weakly magnetized, and unmagnetized. The approach to such self-consistency is described, and in particular a scheme for interpolating between full-orbit (Boris) and drift-kinetic particle pushes that enables electron time steps long compared to the typical gyroperiod in the magnets. Tests and applications are presented: simulation of electron clouds produced by three different kinds of sources indicates the sensitivity of the cloud shape to the nature of the source; first-of-a-kind self-consistent simulation of electron-cloud experiments on the high-current experiment [L. R. Prost, P. A. Seidl, F. M. Bieniosek, C. M. Celata, A. Faltens, D. Baca, E. Henestroza, J. W. Kwan, M. Leitner, W. L. Waldron, R. Cohen, A. Friedman, D. Grote, S. M. Lund, A. W. Molvik, and E. Morse, "High current transport experiment for heavy ion inertial fusion," Physical Review Special Topics, Accelerators and Beams 8, 020101 (2005)], at Lawrence Berkeley National Laboratory, in which the machine can be flooded with electrons released by impact of the ion beam on an end plate, demonstrate the ability to reproduce key features of the ion-beam phase space; and simulation of a two-stream instability of thin beams in a magnetic field demonstrates the ability of the large-time-step mover to accurately calculate the instability. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Tech X Corp, Boulder, CO 80303 USA. RP Cohen, RH (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM rcohen@llnl.gov NR 14 TC 22 Z9 22 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 2005 VL 12 IS 5 AR 056708 DI 10.1063/1.1882292 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200158 ER PT J AU Dahlburg, JP Davidson, RC AF Dahlburg, JP Davidson, RC TI Foreword: Papers from the 46th Annual Meeting of the APS Division of Plasma Physics, Savannah, Georgia, 2004 SO PHYSICS OF PLASMAS LA English DT Editorial Material C1 USN, Res Lab, Washington, DC 20375 USA. Princeton Plasma Phys Lab, Princeton, NJ USA. RP USN, Res Lab, 455 Overlook Ave SW,POB 85608, Washington, DC 20375 USA. NR 0 TC 0 Z9 0 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 2005 VL 12 IS 5 AR 055301 DI 10.1063/1.1896955 PG 1 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200094 ER PT J AU Davis, JP Deeney, C Knudson, MD Lemke, RW Pointon, TD Bliss, DE AF Davis, JP Deeney, C Knudson, MD Lemke, RW Pointon, TD Bliss, DE TI Magnetically driven isentropic compression to multimegabar pressures using shaped current pulses on the Z accelerator SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID GPA; SOLIDS AB A technique has previously been developed on the Z accelerator [R. B. Spielman , Phys. Plasmas 5, 2105 (1998)] to generate ramped compression waves in condensed matter for equation-of-state studies [C. A. Hall, J. R. Asay, M. D. Knudson, W. A. Stygar, R. B. Spielman, T. D. Pointon, D. B. Reisman, A. Toor, and R. C. Cauble, Rev. Sci. Instrum. 72, 3587 (2001)] by using the Lorentz force to push on solid electrodes rather than to drive a Z pinch. This technique has now been extended to multimegabar pressures by shaping the current pulse on Z to significantly increase the sample thickness through which the compression wave can propagate without forming a shock. Shockless, free-surface velocity measurements from multiple sample thicknesses on a single experiment can be analyzed using a backward integration technique [D. B. Hayes, C. A. Hall, J. R. Asay, and M. D. Knudson, J. Appl. Phys. 94, 2331 (2003)] to extract an isentropic loading curve. At very high pressures, the accuracy of this method is dominated by relative uncertainty in the transit time between two thicknesses. This paper discusses in some detail the issues involved with accurate measurement of a multimegabar isentrope, including experiment design trade-offs and mechanics of pulse shaping on Z. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jpdavis@sandia.gov NR 20 TC 53 Z9 57 U1 0 U2 11 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 2005 VL 12 IS 5 AR 056310 DI 10.1063/1.1871954 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200139 ER PT J AU Dimonte, G Ramaprabhu, P Youngs, DL Andrews, MJ Rosner, R AF Dimonte, G Ramaprabhu, P Youngs, DL Andrews, MJ Rosner, R TI Recent advances in the turbulent Rayleigh-Taylor instability SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID RICHTMYER-MESHKOV INSTABILITIES; BUBBLE MERGER MODEL; NUMERICAL-SIMULATION; DENSITY RATIO; ACCELERATION; SIMILARITY; DEPENDENCE; SURFACE; FRONTS; GROWTH AB In the turbulent Rayleigh-Taylor instability, the light fluid penetrates the heavy fluid as bubbles with a diameter D-b and amplitude h(b) that grow self-similarly D-b proportional to h(b)similar to alpha(b)A gt(2) where A is Atwood number, g is acceleration, and t is time. Experiments measure an acceleration constant alpha(b)similar to 0.04-0.08 whereas the highest resolution three-dimensional numerical simulations obtain alpha(b)similar to 0.02-0.03 with idealized initial conditions. This paper reconciles this apparent discrepancy with new simulations that quantify the importance of initial conditions on alpha(b). The results compare favorably with experiments and a model based on self-similar bubble dynamics. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Atom Weapons Estab, Reading RG7 4PR, Berks, England. Texas A&M Univ, College Stn, TX 77843 USA. Univ Chicago, Chicago, IL 60637 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 45 TC 17 Z9 17 U1 1 U2 4 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 2005 VL 12 IS 5 AR 056301 DI 10.1063/1.1871952 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200130 ER PT J AU Edwards, J Marinak, M Dittrich, T Haan, S Sanchez, J Klingmann, J Moody, J AF Edwards, J Marinak, M Dittrich, T Haan, S Sanchez, J Klingmann, J Moody, J TI The effects of fill tubes on the hydrodynamics of ignition targets and prospects for ignition SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID FACILITY AB The notion of using a narrow bore fill tube to charge an ignition capsule in situ with deuterium-tritium (DT) fuel is very attractive because it eliminates the need for cryogenic transport of the target from the filling station to the target chamber, and in principle is one way of allowing any material to be considered as an ablator. We are using the radiation hydrocode HYDRA [M. M. Marinak , Phys. Plasmas 8, 2275 (2001)] in two dimensions to study the effect of fill tubes on graded copper-doped Be ignition capsule implosions. The capsule is similar to 1.1-mm radius and driven at similar to 300 eV. Fill tubes are made of glass and range in diameter from 10-20 mu m. These are inserted between 5 and 40 mu m into the ablator surface, and a glue layer around the capsule similar to 2-mu m thick is included. The calculations are unusually demanding in that the flow is highly nonlinear from the outset, and very high angular resolution is necessary to capture the initial evolution of the tube, which is complex. Despite this complexity, the net result is that by the time the capsule implosion takes off, a preferred, simple Bessel-like mode is set up that is almost independent of, and much larger than, the initial tube size, and close to the fastest growing mode for the capsule. The perturbation continues to grow during the unstable acceleration phase, and inverts as the capsule begins to stagnate, sending a spike of cold DT into the forming hot spot. In all cases studied the capsule ignites and gives close to clean one-dimensional yield. The principal seed of the perturbation appears to be shielding of the ablator in the close vicinity of the fill tube, and the growth is found to vary linearly with the diameter of the tube. The simulations and results are discussed. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Edwards, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM edwards39@llnl.gov NR 13 TC 22 Z9 22 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 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2005 VL 12 IS 5 AR 056318 DI 10.1063/1.1914809 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200147 ER PT J AU Ferron, JR Casper, TA Doyle, EJ Garofalo, AM Gohil, P Greenfield, CM Hyatt, AW Jayakumar, RJ Kessel, C Kim, JY Luce, TC Makowski, MA Menard, J Murakami, M Petty, CC Politzer, PA Taylor, TS Wade, MR AF Ferron, JR Casper, TA Doyle, EJ Garofalo, AM Gohil, P Greenfield, CM Hyatt, AW Jayakumar, RJ Kessel, C Kim, JY Luce, TC Makowski, MA Menard, J Murakami, M Petty, CC Politzer, PA Taylor, TS Wade, MR TI Optimization of DIII-D advanced tokamak discharges with respect to the beta limit SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID NEGATIVE CENTRAL SHEAR; NEOCLASSICAL TEARING MODES; RESISTIVE WALL MODE; MAGNETIC SHEAR; PRESSURE PROFILE; HIGH-PERFORMANCE; COMPLETE SUPPRESSION; CURRENT DRIVE; STABILITY; PLASMAS AB Results are presented from comparisons of modeling and experiment in studies to assess the best choices of safety factor q profile, pressure profile, and discharge shape for high beta, steady-state, noninductive advanced tokamak operation in the DIII-D device [J. L. Luxon, Nucl. Fusion 42, 614 (2002)]. These studies are motivated by the need for high q(min)beta(N) to maximize the self-driven bootstrap current while maintaining high toroidal beta to increase fusion gain. Modeling shows that increases in the normalized beta beta(N) stable to ideal, low toroidal mode number (n=1,2), instabilities can be obtained through broadening of the pressure profile and use of a symmetric double-null divertor shape. Experimental results are in agreement with this prediction. The general trend is for q(min)beta(N) to increase with the minimum q value (q(min)) although beta(N) decreases as q(min) increases. By broadening the pressure profile, beta(N)approximate to 4 is obtained with q(min)approximate to 2. Modeling of equilibria with near 100% bootstrap current indicates that operation with beta(N)approximate to 5 should be possible with a sufficiently broad pressure profile. (c) 2005 American Institute of Physics. C1 Gen Atom Co, San Diego, CA 92186 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Columbia Univ, New York, NY 10027 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Korea Basic Sci Inst, Taejon 305333, South Korea. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Gen Atom Co, POB 85608, San Diego, CA 92186 USA. OI Menard, Jonathan/0000-0003-1292-3286 NR 48 TC 33 Z9 33 U1 1 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 2005 VL 12 IS 5 AR 056126 DI 10.1063/1.1871247 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200128 ER PT J AU Finn, JM Chacon, L AF Finn, JM Chacon, L TI Volume preserving integrators for solenoidal fields on a grid SO PHYSICS OF PLASMAS LA English DT Article ID MAGNETIC SURFACES; DESTRUCTION; FLOW AB A novel method of integrating solenoidal flows given on a grid is developed. In three dimensions, the method involves splitting the flow into two or possibly three flows that are two dimensional and area preserving, and can therefore be integrated by Crank-Nicolson or a modified form of leapfrog, both of which exactly conserve area. The method involves an interpolation scheme which ensures the solenoidal nature of the field throughout the domain (on and off the grid) by means of tricubic splines. It is shown that the method is easily generalized to arbitrary curvilinear coordinates and also generalizes to higher dimensions. A method of integrating compressional three-dimensional flows given on a grid is outlined. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Finn, JM (reprint author), Los Alamos Natl Lab, T-15,POB 1663, Los Alamos, NM 87545 USA. NR 12 TC 22 Z9 22 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 2005 VL 12 IS 5 AR 054503 DI 10.1063/1.1889156 PG 4 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200089 ER PT J AU Furno, I Intrator, TP Hemsing, EW Hsu, SC Abbate, S Ricci, P Lapenta, G AF Furno, I Intrator, TP Hemsing, EW Hsu, SC Abbate, S Ricci, P Lapenta, G TI Coalescence of two magnetic flux ropes via collisional magnetic reconnection SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID LABORATORY PLASMA; TUBES; ASTROPHYSICS; RELAXATION; IMAGES; CAMERA; FIELDS AB Quasi-two-dimensional coalescence of two parallel cylindrical flux ropes and the development of three-dimensional merged structures are observed and studied in the reconnection scaling experiment [Furno , Rev. Sci. Instrum. 74, 2324 (2003)]. These experiments were conducted in a collisional regime with very strong guide magnetic field (B-guide > B-reconnection), which can be adjusted independently of plasma density, current density, and temperature. During initial coalescence, a reconnection current sheet forms between the two flux ropes, and the direction of the current is opposite to the flux rope currents. The measured current sheet thickness is larger than the electron skin depth but smaller than the ion skin depth. Furthermore, the thickness does not vary for three different values of the strong external guide field. It is shown that the geometry of the observed current sheet is consistent with the Sweet-Parker model using a parallel Spitzer resistivity. The flux ropes eventually become kink unstable due to increasing current and fast-gated camera images show the development of three-dimensional merged structures. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, MS E526, Los Alamos, NM 87545 USA. Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA. Politecn Torino, Unita, INFM, I-10129 Turin, Italy. RP Los Alamos Natl Lab, MS E526, Los Alamos, NM 87545 USA. EM furno@lanl.gov; intrator@lanl.gov OI Hsu, Scott/0000-0002-6737-4934; Lapenta, Giovanni/0000-0002-3123-4024 NR 30 TC 20 Z9 20 U1 0 U2 8 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 2005 VL 12 IS 5 AR 055702 DI 10.1063/1.1894418 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200099 ER PT J AU Gary, SP Skoug, RM Smith, CW AF Gary, SP Skoug, RM Smith, CW TI Learning about coronal heating from solar wind observations SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID ADVANCED COMPOSITION EXPLORER; PITCH-ANGLE DIFFUSION; CYCLOTRON WAVES; PROTONS; INSTABILITIES; DISTRIBUTIONS; FLUCTUATIONS; ANISOTROPY; RESONANCE AB Vlasov theory describing the interaction of Alfven-cyclotron fluctuations and ions in the collisionless solar wind predicts that alpha particles should be strongly scattered perpendicular to the background magnetic field when the alpha/proton relative velocity v(alpha p) is negative or has a sufficiently small positive value relative to the Alfven speed v(A). This theory also predicts that, if v(alpha p)/v(A) is positive and sufficiently large, it is the protons which are scattered in the perpendicular direction, although less strongly. Here proton and alpha particle anisotropies measured in the solar wind near 1 AU (AU, astronomical unit) by the plasma and magnetic field instruments on the Advanced Composition Explorer spacecraft are reported which are consistent with these predicted signatures. This indicates that Alfven-cyclotron heating of ions is active in the solar wind; by using this medium to study this fundamental process, a greater understanding may be obtained of how Alfven-cyclotron scattering contributes to heating of ions in the solar corona. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA. RP Gary, SP (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 19 TC 11 Z9 11 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 2005 VL 12 IS 5 AR 056501 DI 10.1063/1.1863192 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200148 ER PT J AU Geddes, CGR Toth, C van Tilborg, J Esarey, E Schroeder, CB Bruhwiler, D Nieter, C Cary, J Leemans, WP AF Geddes, CGR Toth, C van Tilborg, J Esarey, E Schroeder, CB Bruhwiler, D Nieter, C Cary, J Leemans, WP TI Production of high-quality electron bunches by dephasing and beam loading in channeled and unchanneled laser plasma accelerators SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID WAKE-FIELD ACCELERATION; WAKEFIELD ACCELERATORS; THOMSON SCATTERING; NONLINEAR OPTICS; PULSES; WAVE; INJECTION; IONIZATION; BREAKING AB High-quality electron beams, with a few 10(9) electrons within a few percent of the same energy above 80 MeV, were produced in a laser wakefield accelerator by matching the acceleration length to the length over which electrons were accelerated and outran (dephased from) the wake. A plasma channel guided the drive laser over long distances, resulting in production of the high-energy, high-quality beams. Unchanneled experiments varying the length of the target plasma indicated that the high-quality bunches are produced near the dephasing length and demonstrated that channel guiding was more stable and efficient than relativistic self-guiding. Consistent with these data, particle-in-cell simulations indicate production of high-quality electron beams when trapping of an initial bunch of electrons suppresses further injection by loading the wake. The injected electron bunch is then compressed in energy by dephasing, when the front of the bunch begins to decelerate while the tail is still accelerated. (c) 2005 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Tech X Corp, Boulder, CO 80303 USA. Tech Univ Eindhoven, NL-5600 MB Eindhoven, Netherlands. Univ Colorado, Boulder, CO 80309 USA. RP Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM cgrgeddes@lbl.gov OI Schroeder, Carl/0000-0002-9610-0166 NR 52 TC 52 Z9 52 U1 4 U2 13 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 2005 VL 12 IS 5 AR 056709 DI 10.1063/1.1882352 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200159 ER PT J AU Gerhardt, SP Talmadge, JN Canik, JM Anderson, DT AF Gerhardt, SP Talmadge, JN Canik, JM Anderson, DT TI Measurements and modeling of plasma flow damping in the Helically Symmetric eXperiment SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID NONAXISYMMETRIC TOROIDAL PLASMAS; RADIAL ELECTRIC-FIELD; LANGMUIR/MACH PROBE ARRAY; ASPECT-RATIO; BIASING EXPERIMENTS; PARTICLE-TRANSPORT; MOMENTUM TRANSPORT; BIASED ELECTRODE; PLATEAU REGIME; TFTR TOKAMAK AB Measurements of plasma flow damping have been made in the Helically Symmetric eXperiment [F. S. B. Anderson, A. F. Almagri, D. T. Anderson, P. G. Mathews, J. N. Talmadge, and J. L. Shohet, Fusion Technology 27, 273 (1995)] using a biased electrode to impulsively spin the plasma and Mach probes to measure the rotation. There is a distinct asymmetry between the spin-up when the bias is initiated and relaxation when the electrode current is broken. In each case, two time-scales are observed in the evolution of the plasma flow. These observations motivate the development of new neoclassical modeling techniques, including a new model where the fast increment of the electric field initiates the spin-up process. The flow in the quasisymmetric configuration rises more slowly and to a higher value than in a configuration with the quasisymmetry broken, and the rise time-scale is in reasonable agreement with the neoclassical spin-up model. The flows decay more slowly in the quasisymmetry configuration than in the configuration with the quasisymmetry broken, although the decay rates are significantly faster than the neoclassical prediction. (c) 2005 American Institute of Physics. C1 Univ Wisconsin, HXS Plasma Lab, Madison, WI 53706 USA. RP Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. OI Canik, John/0000-0001-6934-6681 NR 51 TC 14 Z9 14 U1 1 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 2005 VL 12 IS 5 AR 056116 DI 10.1063/1./1876293 PG 16 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200118 ER PT J AU Gubernatis, JE AF Gubernatis, JE TI Marshall rosenbluth and the metropolis algorithm SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID EQUATION-OF-STATE AB The 1953 publication, "Equation of State Calculations by Very Fast Computing Machines" by N. Metropolis, A. W. Rosenbluth and M. N. Rosenbluth, and M. Teller and E. Teller [J. Chem. Phys. 21, 1087 (1953)] marked the beginning of the use of the Monte Carlo method for solving problems in the physical sciences. The method described in this publication subsequently became known as the Metropolis algorithm, undoubtedly the most famous and most widely used Monte Carlo algorithm ever published. As none of the authors made subsequent use of the algorithm, they became unknown to the large simulation physics community that grew from this publication and their roles in its development became the subject of mystery and legend. At a conference marking the 50th anniversary of the 1953 publication, Marshall Rosenbluth gave his recollections of the algorithm's development. The present paper describes the algorithm, reconstructs the historical context in which it was developed, and summarizes Marshall's recollections. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, MS B262,POB T-11, Los Alamos, NM 87545 USA. NR 10 TC 7 Z9 7 U1 0 U2 2 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 2005 VL 12 IS 5 AR 057303 DI 10.1063/1.1887186 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200169 ER PT J AU Haan, SW Herrmann, MC Dittrich, TR Fetterman, AJ Marinak, MM Munro, DH Pollaine, SM Salmonson, JD Strobel, GL Suter, LJ AF Haan, SW Herrmann, MC Dittrich, TR Fetterman, AJ Marinak, MM Munro, DH Pollaine, SM Salmonson, JD Strobel, GL Suter, LJ TI Increasing robustness of indirect drive capsule designs against short wavelength hydrodynamic instabilities SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID NATIONAL-IGNITION-FACILITY; OF-STATE MEASUREMENTS; IMPLOSION EXPERIMENTS; BERYLLIUM CAPSULES; HYDRA SIMULATIONS; TARGETS; DEUTERIUM; EQUATION; ENERGY; NOVA AB Targets meant to achieve ignition on the National Ignition Facility (NIF) [J. A. Paisner, J. D. Boyes, S. A. Kumpan, W. H. Lowdermilk, and M. S. Sorem, Laser Focus World 30, 75 (1994)] have been redesigned and their performance simulated. Simulations indicate dramatically reduced growth of short wavelength hydrodynamic instabilities, resulting from two changes in the designs. First, better optimization results from systematic mapping of the ignition target performance over the parameter space of ablator and fuel thickness combinations, using techniques developed by one of us (Herrmann). After the space is mapped with one-dimensional simulations, exploration of it with two-dimensional simulations quantifies the dependence of instability growth on target dimensions. Low modes and high modes grow differently for different designs, allowing a trade-off of the two regimes of growth. Significant improvement in high-mode stability can be achieved, relative to previous designs, with only insignificant increase in low-mode growth. This procedure produces capsule designs that, in simulations, tolerate several times the surface roughness that could be tolerated by capsules optimized by older more heuristic techniques. Another significant reduction in instability growth, by another factor of several, is achieved with ablators with radially varying dopant. In this type of capsule the mid-Z dopant, which is needed in the ablator to minimize x-ray preheat at the ablator-ice interface, is optimally positioned within the ablator. A fabrication scenario for graded dopants already exists, using sputter coating to fabricate the ablator shell. We describe the systematics of these advances in capsule design, discuss the basis behind their improved performance, and summarize how this is affecting our plans for NIF ignition. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Haan, SW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 34 TC 66 Z9 67 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 2005 VL 12 IS 5 AR 056316 DI 10.1063/1.1885003 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200145 ER PT J AU Harvey, RW Taylor, G AF Harvey, RW Taylor, G TI Electron Bernstein wave-bootstrap current synergy in the National Spherical Torus Experiment SO PHYSICS OF PLASMAS LA English DT Article ID LOCALIZED CURRENT DRIVE; TEARING MODES; STABILIZATION; PLASMAS; LAUNCH; BETA AB Current driven by electron Bernstein waves (EBW) and by the electron bootstrap effect are calculated separately and concurrently with a kinetic code to determine the degree of synergy between them. A target beta=40% NSTX [M. Ono, S. Kaye, M. Peng , Proceedings of the 17th IAEA Fusion Energy Conference, edited by M. Spak (IAEA, Vienna, Austria, 1999), Vol. 3, p. 1135] plasma is examined. A simple bootstrap model in the collisional-quasilinear CQL3D Fokker-Planck code (National Technical Information Service document No. DE93002962) is used in these studies: the transiting electron distributions are connected in velocity space at the trapped-passing boundary to trapped-electron distributions that are displaced radially by a half-banana-width outwards/inwards for the co-passing/counter-passing regions. This model agrees well with standard bootstrap current calculations over the outer 60% of the plasma radius. Relatively small synergy net bootstrap current is obtained for EBW power up to 4 MW. Locally, bootstrap current density increases in proportion to increased plasma pressure, and this effect can significantly affect the radial profile of driven current. (c) 2005 American Institute of Physics. C1 CompX, Del Mar, CA 92014 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP CompX, Del Mar, CA 92014 USA. NR 22 TC 2 Z9 2 U1 0 U2 2 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 2005 VL 12 IS 5 AR 052509 DI 10.1063/1.1893586 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200053 ER PT J AU Hegelich, BM Albright, B Audebert, P Blazevic, A Brambrink, E Cobble, J Cowan, T Fuchs, J Gauthier, JC Gautier, C Geissel, M Habs, D Johnson, R Karsch, S Kemp, A Letzring, S Roth, M Schramm, U Schreiber, J Witte, KJ Fernandez, JC AF Hegelich, BM Albright, B Audebert, P Blazevic, A Brambrink, E Cobble, J Cowan, T Fuchs, J Gauthier, JC Gautier, C Geissel, M Habs, D Johnson, R Karsch, S Kemp, A Letzring, S Roth, M Schramm, U Schreiber, J Witte, KJ Fernandez, JC TI Spectral properties of laser-accelerated mid-Z MeV/u ion beams SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID PLASMA INTERACTION; GENERATION; TRANSPORT; SURFACES; SOLIDS; CARBON; FOILS AB Collimated jets of beryllium, carbon, oxygen, fluorine, and palladium ions with > 1 MeV/nucleon energies are observed from the rear surface of thin foils irradiated with laser intensities of up to 5x10(19) W/cm(2). The normally dominant proton acceleration is suppressed when the target is subjected to Joule heating to remove hydrogen-bearing contaminant. This inhibits screening effects and permits effective energy transfer to and acceleration of heavier ion species. The influence of remnant protons on the spectral shape of the next highest charge-to-mass ratio species is shown. Particle-in-cell simulations confirming the experimental findings are presented. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Ecole Polytech, Lab Utilisat Lasers Intenses, F-91128 Palaiseau, France. Tech Univ Darmstadt, D-64289 Darmstadt, Germany. Univ Nevada, Dept Phys, Reno, NV 89557 USA. Univ Bordeaux 1, CELLA, UMR 5107, CNRS,CEA, F-33405 Talence, France. Univ Munich, D-85748 Garching, Germany. Max Planck Inst Quantum Opt, D-85748 Garching, Germany. RP Hegelich, BM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Schramm, Ulrich/C-9393-2012; Fernandez, Juan/H-3268-2011; Fuchs, Julien/D-3450-2016; Cowan, Thomas/A-8713-2011 OI Schramm, Ulrich/0000-0003-0390-7671; Fernandez, Juan/0000-0002-1438-1815; Fuchs, Julien/0000-0001-9765-0787; Cowan, Thomas/0000-0002-5845-000X NR 26 TC 49 Z9 50 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 2005 VL 12 IS 5 AR 056314 DI 10.1063/1.1915350 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200143 ER PT J AU Hershcovitch, A Team, A AF Hershcovitch, A Team, A TI Air boring and nonvacuum electron beam welding with a plasma window SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID PARTICLE BEAMS; TRANSMISSION; ATMOSPHERE; VACUUM AB The plasma window is a novel apparatus that utilizes a stabilized plasma arc as interface between vacuum and atmosphere or pressurized targets without solid material. Additionally, the plasma has a lensing effect on charged particles. This feature enables beam focusing to very small spot sizes and overcoming beam dispersion due to scattering by atmospheric atoms and molecules. Recently, the plasma window was mated to a conventional electron beam welder. And, electron beam welding in atmosphere was accomplished with electron beams of unprecedented low power and energy. Weld quality for the nonvacuum plasma window electron beam welding approached the quality of in-vacuum electron beam welding, without the use of helium as process gas. Weld widths were independent of stand-off distance for up to 5 cm, which along with visual observations suggest that pinched beam propagation might have been achieved with 6-25 mA, 90-150 KeV electron beams. That may explain the better than expected welding results. By comparison previously demonstrated self-pinched propagation used kA MeV electron beams. (c) 2005 American Institute of Physics. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Acceleron Inc, E Granby, CT 06026 USA. RP Brookhaven Natl Lab, Upton, NY 11973 USA. EM hershcovitch@bnl.gov NR 12 TC 8 Z9 8 U1 1 U2 4 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 2005 VL 12 IS 5 AR 057102 DI 10.1063/1.1863232 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200164 ER PT J AU Hinkel, DE Schneider, MB Baldis, HA Bonanno, G Bower, DE Campbell, KM Celeste, JR Compton, S Costa, R Dewald, EL Dixit, SN Eckart, MJ Eder, DC Edwards, MJ Ellis, A Emig, JA Froula, DH Glenzer, SH Hargrove, D Haynam, CA Heeter, RF Henesian, MA Holder, JP Holtmeier, G James, L Jancaitis, KS Kalantar, DH Kamperschroer, JH Kauffman, RL Kimbrough, J Kirkwood, RK Koniges, AE Landen, OL Landon, M Langdon, AB Lee, FD MacGowan, BJ Mackinnon, AJ Manes, KR Marshall, C May, MJ McDonald, JW Menapace, J Moses, EI Munro, DH Murray, JR Niemann, C Pellinen, D Rekow, V Ruppe, JA Schein, J Shepherd, R Singh, MS Springer, PT Still, CH Suter, LJ Tietbohl, GL Turner, RE Van Wonterghem, BM Wallace, RJ Warrick, A Watts, P Weber, F Wegner, PJ Williams, EA Young, BK Young, PE AF Hinkel, DE Schneider, MB Baldis, HA Bonanno, G Bower, DE Campbell, KM Celeste, JR Compton, S Costa, R Dewald, EL Dixit, SN Eckart, MJ Eder, DC Edwards, MJ Ellis, A Emig, JA Froula, DH Glenzer, SH Hargrove, D Haynam, CA Heeter, RF Henesian, MA Holder, JP Holtmeier, G James, L Jancaitis, KS Kalantar, DH Kamperschroer, JH Kauffman, RL Kimbrough, J Kirkwood, RK Koniges, AE Landen, OL Landon, M Langdon, AB Lee, FD MacGowan, BJ Mackinnon, AJ Manes, KR Marshall, C May, MJ McDonald, JW Menapace, J Moses, EI Munro, DH Murray, JR Niemann, C Pellinen, D Rekow, V Ruppe, JA Schein, J Shepherd, R Singh, MS Springer, PT Still, CH Suter, LJ Tietbohl, GL Turner, RE Van Wonterghem, BM Wallace, RJ Warrick, A Watts, P Weber, F Wegner, PJ Williams, EA Young, BK Young, PE TI Laser coupling to reduced-scale hohlraum targets at the early light program of the National Ignition Facility SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID ELECTROMAGNETIC-WAVES; BEAM DEFLECTION; ENERGY-TRANSFER; PLASMA; SYSTEM; SCATTERING; REDUCTION; FUSION AB A platform for analysis of material properties under extreme conditions, where a sample is bathed in radiation with a high temperature, is under development. Depositing maximum laser energy into a small, high-Z enclosure produces this hot environment. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technol. 26, 755 (1994)], under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temperature of 340 eV. In addition, there is a unique wavelength dependence of the Raman backscattered light that is consistent with Brillouin backscatter of Raman forward scatter [A. B. Langdon and D. E. Hinkel, Phys. Rev. Lett. 89, 015003 (2002)]. Finally, novel diagnostic capabilities indicate that 20% of the direct backscatter from these reduced-scale targets is in the polarization orthogonal to that of the incident light. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. RI MacKinnon, Andrew/P-7239-2014 OI MacKinnon, Andrew/0000-0002-4380-2906 NR 34 TC 24 Z9 24 U1 1 U2 2 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 2005 VL 12 IS 5 AR 056305 DI 10.1063/1.188012 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200134 ER PT J AU Hu, B Betti, R Manickam, J AF Hu, B Betti, R Manickam, J TI Application of the low-frequency energy principle to wall modes SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID RESISTIVE WALL; ACTIVE FEEDBACK; PLASMA ROTATION; KINK MODES; STABILIZATION; TOKAMAKS; STABILITY; DESIGN; ITER AB The effects of trapped particles on the stability of the n=1 resistive wall mode are investigated by means of a generalized energy principle. The analysis is carried out for the stationary high-beta plasma equilibrium of the International Thermonuclear Experimental Reactor (ITER) [ K. Tomabechi Nucl. Fusion 31, 1135 (1991)] advanced-tokamak scenario. It is found that the trapped particle compressibility and the dissipation induced by the mode resonance with the trapped particle precession motion are stabilizing. By retaining the contribution of trapped thermal ions, electrons, and alpha particles, the resistive wall mode growth rate is significantly reduced and the mode almost fully suppressed. This effect vanishes for fast flowing plasmas rotating toroidally with a frequency above the ion diamagnetic frequency. (c) 2005 American Institute of Physics. C1 Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. Univ Rochester, Dept Engn Mech, Rochester, NY 14623 USA. Univ Rochester, Dept Phys & Astron, Rochester, NY 14623 USA. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Betti, R (reprint author), Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. NR 24 TC 60 Z9 61 U1 2 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 2005 VL 12 IS 5 AR 057301 DI 10.1063/1.1873852 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200167 ER PT J AU Ishida, A Cheng, CZ Peng, YKM AF Ishida, A Cheng, CZ Peng, YKM TI Properties of low and medium frequency modes in two-fluid plasma SO PHYSICS OF PLASMAS LA English DT Article ID EQUILIBRIA; COMPRESSIBILITY; INSTABILITY; BETA AB Based on a two-fluid plasma model where the electron mass and the displacement current are neglected, the eigenmode properties such as the frequency and the compressibility are studied. It is found that these properties strongly depend on the two-fluid parameter kl(i), where k is the wave number of a mode and l(i) is the ion skin depth. Especially it is found that as the two-fluid parameter kl(i) increases beyond unity, the Alfven wave, which is an incompressible mode in the magnetohydrodynamics (MHD) limit, becomes compressible and its phase velocity approaches to the acoustic speed. The slow magnetosonic wave, which is compressible in the MHD limit, becomes incompressible as kl(i) increases. Implications of these results are also discussed. (c) 2005 American Institute of Physics. C1 Niigata Univ, Fac Sci, Dept Environm Sci, Niigata 9502181, Japan. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ishida, A (reprint author), Niigata Univ, Fac Sci, Dept Environm Sci, Niigata 9502181, Japan. EM ishida@env.sc.niigata-u.ac.jp RI Cheng, Chio/K-1005-2014 NR 12 TC 6 Z9 6 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 2005 VL 12 IS 5 AR 052113 DI 10.1063/1.1905604 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200016 ER PT J AU Jardin, SC Breslau, JA AF Jardin, SC Breslau, JA TI Implicit solution of the four-field extended-magnetohydrodynamic equations using high-order high-continuity finite elements SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID FORCED MAGNETIC RECONNECTION; SIMULATION AB Here we describe a technique for solving the four-field extended-magnetohydrodynamic (MHD) equations in two dimensions. The introduction of triangular high-order finite elements with continuous first derivatives (C-1 continuity) leads to a compact representation compatible with direct inversion of the associated sparse matrices. The split semi-implicit method is introduced and used to integrate the equations in time, yielding unconditional stability for arbitrary time step. The method is applied to the cylindrical tilt mode problem with the result that a nonzero value of the collisionless ion skin depth will increase the growth rate of that mode. The effect of this parameter on the reconnection rate and geometry of a Harris equilibrium and on the Taylor reconnection problem is also demonstrated. This method forms the basis for a generalization to a full extended-MHD description of the plasma with six, eight, or more scalar fields. (c) 2005 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Jardin, SC (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI Jardin, Stephen/E-9392-2010 NR 17 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 2005 VL 12 IS 5 AR 056101 DI 10.1063/1.1864992 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200103 ER PT J AU Koh, WS Ang, LK Kwan, TJT AF Koh, WS Ang, LK Kwan, TJT TI Three-dimensional Child-Langmuir law for uniform hot electron emission SO PHYSICS OF PLASMAS LA English DT Article ID CHARGE-LIMITED FLOW; SPACE-CHARGE; BEAM; CURRENTS; DIODES AB This paper presents a three-dimensional (3D) model of Child-Langmuir (CL) law for uniform hot electron emission in planar and cylindrical gap, including the effects of finite emission energy. It is found that the enhancement of 3D CL law (in terms of 1D CL law) can be written in a general form of J(C)[3D] / J(C)[1D]= 1 + F X G, where F is the normalized mean position of 1D electron flow in classical, weakly relativistic, and quantum regime, and G is the geometrical correction factor depending on the geometrical properties of the finite emitting patches on the cathode. In particular, we present the analytical solutions for various emitting patches, such as rectangle, ellipse, square, circle, triangle, and polygon, which agree very well with 3D particle-in-cell simulation. For a cylindrical gap of finite width, it is also found that the convergent flow (cathode outside) has larger enhancement than the divergent flow (cathode inside) at a given aspect ratio of outer radius to inner radius of the gap. Smooth transition from various operating regimes is demonstrated. (c) 2005 American Institute of Physics. C1 Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore. Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. RP Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore. EM elkang@ntu.edu.sg RI Koh, Wee Shing/B-2201-2008; ANG, Lay Kee/F-8115-2015 OI ANG, Lay Kee/0000-0003-2811-1194 NR 21 TC 30 Z9 30 U1 0 U2 7 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 2005 VL 12 IS 5 AR 053107 DI 10.1063/1.1913612 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200082 ER PT J AU Lewandowski, JLV AF Lewandowski, JLV TI Low-noise collision operators for particle-in-cell simulations SO PHYSICS OF PLASMAS LA English DT Article ID PLASMA; MODEL AB A new method to implement low-noise collision operators in particle-in-cell simulations is presented. The method is based on the fact that relevant collision operators can be included naturally in the Lagrangian formulation that exemplifies the particle-in-cell simulation method. Numerical simulations show that the momentum and energy conservation properties of the simulated plasma associated with the low-noise collision operator are improved as compared with standard collision algorithms based on random numbers. (c) 2005 American Institute of Physics. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Lewandowski, JLV (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM jlewando@pppl.gov NR 14 TC 6 Z9 6 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 2005 VL 12 IS 5 AR 052322 DI 10.1063/1.1896374 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200042 ER PT J AU Lorenz, KT Edwards, MJ Glendinning, SG Jankowski, AF McNaney, J Pollaine, SM Remington, BA AF Lorenz, KT Edwards, MJ Glendinning, SG Jankowski, AF McNaney, J Pollaine, SM Remington, BA TI Accessing ultrahigh-pressure, quasi-isentropic states of matter SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID NATIONAL-IGNITION-FACILITY; TAYLOR INSTABILITY; SHEAR-STRENGTH; STRAIN-RATE; CAMERAS; COMPRESSION; ALUMINUM; SOLIDS; METALS; MODEL AB A new approach to the study of material strength of metals at extreme pressures has been developed on the Omega laser, using a ramped plasma piston drive. The laser drives a shock through a solid plastic reservoir that unloads at the rear free surface, expands across a vacuum gap, and stagnates on the metal sample under study. This produces a gently increasing ram pressure, compressing the sample nearly isentropically. The peak pressure on the sample, inferred from interferometric measurements of velocity, can be varied by adjusting the laser energy and pulse length, gap size, and reservoir density, and obeys a simple scaling relation [J. Edwards , Phys. Rev. Lett. 92, 075002 (2004)]. In an important application, using in-flight x-ray radiography, the material strength of solid-state samples at high pressure can be inferred by measuring the reductions in the growth rates (stabilization) of Rayleigh-Taylor unstable interfaces. This paper reports the first attempt to use this new laser-driven, quasi-isentropic technique for determining material strength in high-pressure solids. Modulated foils of Al-6061-T6 were accelerated and compressed to peak pressures of similar to 200 kbar. Modulation growth was recorded at a series of times after peak acceleration and well into the release phase. Fits to the growth data, using a Steinberg-Guinan constitutive strength model, give yield strengths 38% greater than those given by the nominal parameters for Al-6061-T6. Calculations indicate that the dynamic enhancement to the yield strength at similar to 200 kbar is a factor of similar to 3.6x over the ambient yield strength of 2.9 kbar. Experimental designs based on this drive developed for the National Ignition Facility laser [W. Hogan, E. Moses, B. Warner, M. Sorem, and J. Soures, Nuclear Fusion 41, 567 (2001)] predict that solid-state samples can be quasi-isentropically driven to pressures an order of magnitude higher than on Omega, accessing new regimes of dense, high-pressure matter. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Lorenz, KT (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RI McNaney, James/F-5258-2013 NR 30 TC 49 Z9 55 U1 4 U2 13 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 2005 VL 12 IS 5 AR 056309 DI 10.1063/1.1873812 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200138 ER PT J AU Lynch, VE Carreras, BA Sanchez, R LaBombard, B van Milligen, BP Newman, DE AF Lynch, VE Carreras, BA Sanchez, R LaBombard, B van Milligen, BP Newman, DE TI Determination of long-range correlations by quiet-time statistics SO PHYSICS OF PLASMAS LA English DT Article ID SELF-ORGANIZED CRITICALITY; ALCATOR-C-MOD; SCRAPE-OFF LAYER; PLASMA EDGE; TURBULENCE; TRANSPORT AB Quiet-time statistics is an approach to the analysis of fluctuation time series that, by measuring the duration of successive transport events and the quiet times between them, allows the extraction of information on the long-range correlations in the system. It provides information similar to that obtained from rescaled adjusted range (R/S) statistics. However, when the data are contaminated by extraneous oscillations, it is difficult to effectively use R/S statistics or standard quiet-time analysis. In this paper, quiet-time analysis is generalized so that time series contaminated by oscillations can be treated. This new technique is effective over a wide range of time scales. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. CIEMAT, EURATOM Assoc, Lab Nacl Fus, E-28040 Madrid, Spain. Univ Alaska, Fairbanks, AK 99795 USA. RP Lynch, VE (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Sanchez, Raul/C-2328-2008; Lynch, Vickie/J-4647-2012; van Milligen, Boudewijn/H-5121-2015 OI Lynch, Vickie/0000-0002-5836-7636; van Milligen, Boudewijn/0000-0001-5344-6274 NR 19 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 2005 VL 12 IS 5 AR 052304 DI 10.1063/1.1890985 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200024 ER PT J AU Matzen, MK Sweeney, MA Adams, RG Asay, JR Bailey, JE Bennett, GR Bliss, DE Bloomquist, DD Brunner, TA Campbell, RB Chandler, GA Coverdale, CA Cuneo, ME Davis, JP Deeney, C Desjarlais, MP Donovan, GL Garasi, CJ Haill, TA Hall, CA Hanson, DL Hurst, MJ Jones, B Knudson, MD Leeper, RJ Lemke, RW Mazarakis, MG McDaniel, DH Mehlhorn, TA Nash, TJ Olson, CL Porter, JL Rambo, PK Rosenthal, SE Rochau, GA Ruggles, LE Ruiz, CL Sanford, TWL Seamen, JF Sinars, DB Slutz, SA Smith, IC Struve, KW Stygar, WA Vesey, RA Weinbrecht, EA Wenger, DF Yu, EP AF Matzen, MK Sweeney, MA Adams, RG Asay, JR Bailey, JE Bennett, GR Bliss, DE Bloomquist, DD Brunner, TA Campbell, RB Chandler, GA Coverdale, CA Cuneo, ME Davis, JP Deeney, C Desjarlais, MP Donovan, GL Garasi, CJ Haill, TA Hall, CA Hanson, DL Hurst, MJ Jones, B Knudson, MD Leeper, RJ Lemke, RW Mazarakis, MG McDaniel, DH Mehlhorn, TA Nash, TJ Olson, CL Porter, JL Rambo, PK Rosenthal, SE Rochau, GA Ruggles, LE Ruiz, CL Sanford, TWL Seamen, JF Sinars, DB Slutz, SA Smith, IC Struve, KW Stygar, WA Vesey, RA Weinbrecht, EA Wenger, DF Yu, EP TI Pulsed-power-driven high energy density physics and inertial confinement fusion research SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID ARRAY Z-PINCH; NATIONAL IGNITION FACILITY; ISENTROPIC COMPRESSION EXPERIMENTS; EQUATION-OF-STATE; X-RAY POWER; NOVA LASER; ELECTRICAL-CONDUCTIVITY; CYLINDRICAL HOHLRAUMS; RADIATION SYMMETRY; CAPSULE IMPLOSIONS AB The Z accelerator [R. B. Spielman, W. A. Stygar, J. F. Seamen , Proceedings of the 11th International Pulsed Power Conference, Baltimore, MD, 1997, edited by G. Cooperstein and I. Vitkovitsky (IEEE, Piscataway, NJ, 1997), Vol. 1, p. 709] at Sandia National Laboratories delivers similar to 20 MA load currents to create high magnetic fields (> 1000 T) and high pressures (megabar to gigabar). In a z-pinch configuration, the magnetic pressure (the Lorentz force) supersonically implodes a plasma created from a cylindrical wire array, which at stagnation typically generates a plasma with energy densities of about 10 MJ/cm(3) and temperatures > 1 keV at 0.1% of solid density. These plasmas produce x-ray energies approaching 2 MJ at powers > 200 TW for inertial confinement fusion (ICF) and high energy density physics (HEDP) experiments. In an alternative configuration, the large magnetic pressure directly drives isentropic compression experiments to pressures > 3 Mbar and accelerates flyer plates to > 30 km/s for equation of state (EOS) experiments at pressures up to 10 Mbar in aluminum. Development of multidimensional radiation-magnetohydrodynamic codes, coupled with more accurate material models (e.g., quantum molecular dynamics calculations with density functional theory), has produced synergy between validating the simulations and guiding the experiments. Z is now routinely used to drive ICF capsule implosions (focusing on implosion symmetry and neutron production) and to perform HEDP experiments (including radiation-driven hydrodynamic jets, EOS, phase transitions, strength of materials, and detailed behavior of z-pinch wire-array initiation and implosion). This research is performed in collaboration with many other groups from around the world. A five year project to enhance the capability and precision of Z, to be completed in 2007, will result in x-ray energies of nearly 3 MJ at x-ray powers > 300 TW. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 201 TC 168 Z9 186 U1 5 U2 33 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 2005 VL 12 IS 5 AR 055503 DI 10.1063/1.1891746 PG 16 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200097 ER PT J AU Miles, AR Blue, B Edwards, MJ Greenough, JA Hansen, JF Robey, HF Drake, RP Kuranz, C Leibrandt, DR AF Miles, AR Blue, B Edwards, MJ Greenough, JA Hansen, JF Robey, HF Drake, RP Kuranz, C Leibrandt, DR TI Transition to turbulence and effect of initial conditions on three-dimensional compressible mixing in planar blast-wave-driven systems SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID RAYLEIGH-TAYLOR INSTABILITY; RICHTMYER-MESHKOV INSTABILITY; NUMERICAL-SIMULATION; REYNOLDS-NUMBER; INTERFACE; FLUIDS; SCALE; FLOW AB Perturbations on an interface driven by a strong blast wave grow in time due to a combination of Rayleigh-Taylor, Richtmyer-Meshkov, and decompression effects. In this paper, results from three-dimensional (3D) numerical simulations of such a system under drive conditions to be attainable on the National Ignition Facility [E. M. Campbell, Laser Part. Beams 9, 209 (1991)] are presented. Using the multiphysics, adaptive mesh refinement, higher order Godunov Eulerian hydrocode, Raptor [L. H. Howell and J. A. Greenough, J. Comput. Phys. 184, 53 (2003)], the late nonlinear instability evolution, including transition to turbulence, is considered for various multimode perturbation spectra. The 3D post-transition state differs from the 2D result, but the process of transition proceeds similarly in both 2D and 3D. The turbulent mixing transition results in a reduction in the growth rate of the mixing layer relative to its pretransition value and, in the case of the bubble front, relative to the 2D result. The post-transition spike front velocity is approximately the same in 2D and 3D. Implications for hydrodynamic mixing in core-collapse supernovae are discussed. 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Michigan, Ann Arbor, MI 48109 USA. RP Miles, AR (reprint author), Lawrence Livermore Natl Lab, L-021,7000 E Ave,POB 808, Livermore, CA 94551 USA. EM miles15@llnl.gov RI Drake, R Paul/I-9218-2012 OI Drake, R Paul/0000-0002-5450-9844 NR 34 TC 20 Z9 21 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 2005 VL 12 IS 5 AR 056317 DI 10.1063/1.1894765 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200146 ER PT J AU Moyer, RA Evans, TE Osborne, TH Thomas, PR Becoulet, M Harris, J Finken, KH Boedo, JA Doyle, EJ Fenstermacher, ME Gohil, P Groebner, RJ Groth, M Jackson, GL La Haye, RJ Lasnier, CJ Leonard, AW McKee, GR Reimerdes, H Rhodes, TL Rudakov, DL Schaffer, MJ Snyder, PB Wade, MR Wang, G Watkins, JG West, WP Zeng, L AF Moyer, RA Evans, TE Osborne, TH Thomas, PR Becoulet, M Harris, J Finken, KH Boedo, JA Doyle, EJ Fenstermacher, ME Gohil, P Groebner, RJ Groth, M Jackson, GL La Haye, RJ Lasnier, CJ Leonard, AW McKee, GR Reimerdes, H Rhodes, TL Rudakov, DL Schaffer, MJ Snyder, PB Wade, MR Wang, G Watkins, JG West, WP Zeng, L TI Edge localized mode control with an edge resonant magnetic perturbation SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID DENSITY PROFILE MEASUREMENTS; DIII-D TOKAMAK; H-MODE; PARTICLE LOSSES; ASDEX UPGRADE; I ELMS; ITER; REGIME; ENERGY AB A low amplitude (delta b(r)/B-T=1 part in 5000) edge resonant magnetic field perturbation with toroidal mode number n=3 and poloidal mode numbers between 8 and 15 has been used to suppress most large type I edge localized modes (ELMs) without degrading core plasma confinement. ELMs have been suppressed for periods of up to 8.6 energy confinement times when the edge safety factor q(95) is between 3.5 and 4. The large ELMs are replaced by packets of events (possibly type II ELMs) with small amplitude, narrow radial extent, and a higher level of magnetic field and density fluctuations, creating a duty cycle with long "active" intervals of high transport and short "quiet" intervals of low transport. The increased transport associated with these events is less impulsive and slows the recovery of the pedestal profiles to the values reached just before the large ELMs without the n=3 perturbation. Changing the toroidal phase of the perturbation by 60 degrees with respect to the best ELM suppression case reduces the ELM amplitude and frequency by factors of 2-3 in the divertor, produces a more stochastic response in the H-mode pedestal profiles, and displays similar increases in small scale events, although significant numbers of large ELMs survive. In contrast to the best ELM suppression case where the type I ELMs are also suppressed on the outboard midplane, the midplane recycling increases until individual ELMs are no longer discernable. The ELM response depends on the toroidal phase of the applied perturbation because intrinsic error fields make the target plasma nonaxisymmetric, and suggests that at least some of the variation in ELM behavior in a single device or among different devices is due to differences in the intrinsic error fields in these devices. These results indicate that ELMs can be suppressed by small edge resonant magnetic field perturbations. Extrapolation to next-step burning plasma devices will require extending the regime of operation to lower collisionality and understanding the physical mechanism responsible for the ELM suppression. (c) 2005 American Institute of Physics. C1 Univ Calif San Diego, La Jolla, CA 92093 USA. Gen Atom Co, San Diego, CA 92186 USA. EURATOM, CEA Cadarache, Cadarache, France. Australian Natl Univ, Canberra, ACT, Australia. FZ Julich, EURATOM Assoc, Julich, Germany. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Wisconsin, Madison, WI 53706 USA. Columbia Univ, New York, NY 10027 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Univ Calif San Diego, La Jolla, CA 92093 USA. RI Groth, Mathias/G-2227-2013 NR 30 TC 79 Z9 80 U1 3 U2 11 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 2005 VL 12 IS 5 AR 056119 DI 10.1063/1.1888705 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200121 ER PT J AU Nash, TJ McDaniel, DH Leeper, RJ Deeney, CD Sanford, TWL Struve, K DeGroot, JS AF Nash, TJ McDaniel, DH Leeper, RJ Deeney, CD Sanford, TWL Struve, K DeGroot, JS TI Design, simulation, and application of quasi-spherical 100 ns z-pinch implosions driven by tens of mega-amperes SO PHYSICS OF PLASMAS LA English DT Article ID ARRAY Z-PINCH; INERTIAL CONFINEMENT FUSION; DYNAMIC HOHLRAUMS; TEMPERATURE; CAPSULES; IGNITION; PHYSICS; POWER AB A quasi-spherical z-pinch may directly compress foam or deuterium and tritium in three dimensions as opposed to a cylindrical z-pinch, which compresses an internal load in two dimensions only. Because of compression in three dimensions the quasi-spherical z-pinch is more efficient at doing pdV work on an internal fluid than a cylindrical pinch. Designs of quasi-spherical z-pinch loads for the 28 MA 100 ns driver ZR, results from zero-dimensional (0D) circuit models of quasi-spherical implosions, and results from 1D hydrodynamic simulations of quasi-spherical implosions heating internal fluids will be presented. Applications of the quasi-spherical z-pinch implosions include a high radiation temperature source for radiation driven experiments, a source of neutrons for treating radioactive waste, and a source of fusion energy for a power generator. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Nash, TJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 32 TC 18 Z9 22 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 2005 VL 12 IS 5 AR 052705 DI 10.1063/1.18890945 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200067 ER PT J AU Park, J Nebel, RA Stange, S Murali, SK AF Park, J Nebel, RA Stange, S Murali, SK TI Periodically oscillating plasma sphere SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID INERTIAL-ELECTROSTATIC CONFINEMENT; EMISSIVE PROBE; FUSION SYSTEMS; PENNING TRAP; FLUID AB The periodically oscillating plasma sphere, or POPS, is a novel fusion concept first proposed by D. C. Barnes and R. A. Nebel [Fusion Technol. 38, 28 (1998)]. POPS utilizes the self-similar collapse of an oscillating ion cloud in a spherical harmonic oscillator potential well formed by electron injection. Once the ions have been phase-locked, their coherent motion simultaneously produces very high densities and temperatures during the collapse phase of the oscillation. A requirement for POPS is that the electron injection produces a stable harmonic oscillator potential. This has been demonstrated in a gridded inertial electrostatic confinement device and verified by particle simulation. Also, the POPS oscillation has been confirmed experimentally through observation that the ions in the potential well exhibit resonance behavior when driven at the POPS frequency. Excellent agreement between the observed POPS frequencies and the theoretical predictions has been observed for a wide range of potential well depths and three different ion species. Practical applications of POPS require large plasma compressions. These large compressions have been observed in particle simulations, although space charge neutralization remains a major issue. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Park, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. NR 23 TC 12 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 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD MAY PY 2005 VL 12 IS 5 AR 056315 DI 10.1063/1.1888822 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200144 ER PT J AU Raitses, Y Staack, D Keidar, M Fisch, NJ AF Raitses, Y Staack, D Keidar, M Fisch, NJ TI Electron-wall interaction in Hall thrusters SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID STATIONARY PLASMA THRUSTERS; SEGMENTED ELECTRODES; MAGNETIC-FIELD; OPERATION; EMISSION; FLOW; CONDUCTIVITY; PERFORMANCE; SIMULATION; TRANSPORT AB Electron-wall interaction effects in Hall thrusters are studied through measurements of the plasma response to variations of the thruster channel width and the discharge voltage. The discharge voltage threshold is shown to separate two thruster regimes. Below this threshold, the electron energy gain is constant in the acceleration region and therefore, secondary electron emission (SEE) from the channel walls is insufficient to enhance electron energy losses at the channel walls. Above this voltage threshold, the maximum electron temperature saturates. This result seemingly agrees with predictions of the temperature saturation, which recent Hall thruster models explain as a transition to space-charge saturated regime of the near-wall sheath. However, in the experiment, the maximum saturation temperature exceeds by almost three times the critical value estimated under the assumption of a Maxwellian electron energy distribution function. The channel narrowing, which should also enhance electron-wall collisions, causes unexpectedly larger changes of the plasma potential distribution than does the increase of the electron temperature with the discharge voltage. An enhanced anomalous crossed-field mobility (near wall or Bohm-type) is suggested by a hydrodynamic model as an explanation to the reduced electric field measured inside a narrow channel. We found, however, no experimental evidence of a coupling between the maximum electron temperature and the location of the accelerating voltage drop, which might have been expected due to the SEE-induced near-wall conductivity. (c) 2005 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Michigan, Ann Arbor, MI 48109 USA. RP Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM yraitses@pppl.gov RI Staack, David/A-5430-2010 NR 47 TC 63 Z9 66 U1 2 U2 13 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 2005 VL 12 IS 5 AR 057104 DI 10.1063/1.1891747 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200166 ER PT J AU Renk, TJ Shlapakovski, A Peterson, RR Blanchard, JP Martin, C AF Renk, TJ Shlapakovski, A Peterson, RR Blanchard, JP Martin, C TI Miniconference on use of ion beams for surface modification, new materials synthesis, and materials response SO PHYSICS OF PLASMAS LA English DT Article ID WALL MATERIALS RESPONSE; PLANT LEVEL FLUENCES C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Tomsk Polytech Univ, Inst Nucl Phys, Tomsk, Russia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Renk, TJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM tjrenk@sandia.gov NR 16 TC 3 Z9 3 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 2005 VL 12 IS 5 AR 058302 DI 10.1063/1.1911731 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200177 ER PT J AU Ricci, P Brackbill, JU Daughton, W Lapenta, G AF Ricci, P Brackbill, JU Daughton, W Lapenta, G TI New role of the lower-hybrid drift instability in the magnetic reconnection SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID COLLISIONLESS TEARING INSTABILITY; ANISOTROPIC NEUTRAL SHEET; BIFURCATED CURRENT SHEET; NONLINEAR EVOLUTION; LOW-FREQUENCY; PRESSURE ANISOTROPY; PLASMA SIMULATION; FIELD; ONSET; DISSIPATION AB Kinetic simulation results reveal that the growth of the lower-hybrid drift instability (LHDI) in current sheets has an important effect on the onset and nonlinear development of magnetic reconnection. The LHDI does this by heating electrons anisotropically, by increasing the peak current density, by producing current bifurcation, and by causing ion velocity shear. The role of these in magnetic reconnection is explained. Confidence in the results is strongly enhanced by agreement between implicit and massively-parallel-explicit particle-in-cell simulations. (c) 2005 American Institute of Physics. C1 Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA. ParticleSolut, Portland, OR 97214 USA. Univ Iowa, Iowa City, IA 52242 USA. Politecn Torino, Unita, INFM, I-20129 Milan, Italy. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA. EM paolo.ricci@dartmouth.edu; jerrybrackbill@comcast.net; william-daughton@uiowa.edu; lapenta@lanl.gov RI Daughton, William/L-9661-2013; OI Lapenta, Giovanni/0000-0002-3123-4024 NR 50 TC 27 Z9 27 U1 0 U2 4 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 2005 VL 12 IS 5 AR 055901 DI 10.1063/1.1885002 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200102 ER PT J AU Sanchez, R van Milligen, BP Carreras, BA AF Sanchez, R van Milligen, BP Carreras, BA TI Probabilistic transport models for plasma transport in the presence of critical thresholds: Beyond the diffusive paradigm SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID SELF-ORGANIZED CRITICALITY; GRADIENT-DRIVEN TURBULENCE; ANOMALOUS TRANSPORT; RANDOM-WALKS; DIII-D; CONFINEMENT SYSTEMS; EDGE TURBULENCE; DYNAMICS; TOKAMAK; FLUCTUATIONS AB It is argued that the modeling of plasma transport in tokamaks may benefit greatly from extending the usual local paradigm to accommodate scale-free transport mechanisms. This can be done by combining Levy distributions and a nonlinear threshold condition within the continuous time random walk concept. The advantages of this nonlocal, nonlinear extension are illustrated by constructing a simple particle density transport model that, as a result of these ideas, spontaneously exhibits much of nondiffusive phenomenology routinely observed in tokamaks. The fluid limit of the system shows that the kind of equations that are appropriate to capture these dynamics are based on fractional differential operators. In them, effective diffusivities and pinch velocities are found that are dynamically set by the system in response to the specific characteristics of the fueling source and external perturbations. This fact suggests some dramatic consequences for the extrapolation of these transport properties to larger size systems. (c) 2005 American Institute of Physics. C1 Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain. CIEMAT, Asociac EURATOM, Lab Nacl Fus, E-28040 Madrid, Spain. Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA. RP Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain. EM rsanchez@fis.uc3m.es RI Sanchez, Raul/C-2328-2008; van Milligen, Boudewijn/H-5121-2015 OI van Milligen, Boudewijn/0000-0001-5344-6274 NR 51 TC 25 Z9 25 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 2005 VL 12 IS 5 AR 056105 DI 10.1063/1.1869499 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200107 ER PT J AU Sarkisov, GS Struve, KW McDaniel, DH AF Sarkisov, GS Struve, KW McDaniel, DH TI Effect of deposited energy on the structure of an exploding tungsten wire core in a vacuum SO PHYSICS OF PLASMAS LA English DT Article ID ARRAY Z-PINCHES; EXPLOSION AB The experiments demonstrate the full range of transformations of an exploding tungsten wire core from a solid state to total vaporization. These states are correlated with the value of deposited energy before voltage breakdown. If the deposited energy is less than the solid-state enthalpy, the wire remains solid. If the deposited energy is between the solid- and liquid-state enthalpy, the wire disintegrates into solid macroscopic-sized pieces. If the voltage breakdown happens during the liquid state, the wire expands. In this case, the expansion velocity of the wire (0.1-1 km/s) is almost a linear function of the deposited energy. The expanding wire core is homogeneous for a deposited energy more than 4 eV/atom and nonhomogeneous (100-200 mu m scale "spots") for deposited energy less than 4 eV/atom. For homogeneous expansion, the wire core consists mainly of hot liquid microdrops of submicron size [G. S. Sarkisov, P. V. Sasorov, K. W. Struve , J. Appl. Phys. 96, 1674 (2004)]. For deposited energy higher than atomization enthalpy, the wire core transforms into the gas-plasma state. The linear dependence between deposited energy and expansion velocity for W wires was demonstrated. The data presented are important for the optimization of the ablation rate of wire arrays in modern high-current Z-pinch installations. (c) 2005 American Institute of Physics. C1 Ktech Corp Inc, Albuquerque, NM 87123 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Ktech Corp Inc, Albuquerque, NM 87123 USA. EM gssarki@sandia.gov NR 20 TC 25 Z9 27 U1 1 U2 11 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 2005 VL 12 IS 5 AR 052702 DI 10.1063/1.1883180 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200064 ER PT J AU Shadwick, BA Tarkenton, GM Esarey, E Schroeder, CB AF Shadwick, BA Tarkenton, GM Esarey, E Schroeder, CB TI Fluid and Vlasov models of low-temperature, collisionless, relativistic plasma interactions SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID MAGNETIZED PLASMA; ELECTRON-BEAMS AB A warm-fluid model suitable for describing intense laser-plasma interactions is discussed. A momentum-space transformation is developed for the Vlasov-Maxwell system that leads to significant computational savings. Direct numerical solutions of the Vlasov equation are compared to the predictions of the warm-fluid model and excellent agreement is found. In particular, it is found that, as predicted by the warm-fluid model, the bulk fields are largely insensitive to the details of the phase-space distribution. The warm-fluid model is compared to the particle-in-cell model and it is found that the latter model, at typical numerical resolution, predicts a momentum spread in the laser that is unphysically large. (c) 2005 American Institute of Physics. C1 Inst Adv Phys, Conifer, CO 80433 USA. Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Shadwick, BA (reprint author), Inst Adv Phys, Suite 199,10875 US Hwy 285, Conifer, CO 80433 USA. EM bashadwick@lbl.gov OI Schroeder, Carl/0000-0002-9610-0166 NR 17 TC 17 Z9 17 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 2005 VL 12 IS 5 AR 056710 DI 10.1063/1.1865032 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200160 ER PT J AU Sinars, DB Cuneo, ME Jones, B Coverdale, CA Nash, TJ Mazarakis, MG Porter, JL Deeney, C Wenger, DF Adams, RG Yu, EP Bliss, DE Sarkisov, GS AF Sinars, DB Cuneo, ME Jones, B Coverdale, CA Nash, TJ Mazarakis, MG Porter, JL Deeney, C Wenger, DF Adams, RG Yu, EP Bliss, DE Sarkisov, GS TI Measurements of the mass distribution and instability growth for wire-array Z-pinch implosions driven by 14-20 MA SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID X-RAY RESPONSE; PHOTOGRAPHIC FILMS; DYNAMICS; FACILITY; PLASMAS; PHYSICS; MODELS AB The mass distribution and axial instability growth of wire-array Z-pinch implosions driven by 14-20 MA has been studied using high-resolution, monochromatic x-ray backlighting diagnostics. A delayed implosion is consistently observed in which persistent, dense wire cores continuously ablate plasma until they dissipate and the main implosion begins. In arrays with small interwire gaps, azimuthally correlated axial instabilities appear during the wire ablation stage and subsequently seed the early growth of magneto-Rayleigh-Taylor instabilities. The instabilities create a distributed implosion front with trailing mass that may limit the peak radiation power. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sinars, DB (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM dbsinar@sandia.gov NR 30 TC 42 Z9 43 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 2005 VL 12 IS 5 AR 056303 DI 10.1063/1.1876272 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200132 ER PT J AU Smalyuk, VA Delettrez, JA Dumanis, SB Epstein, R Glebov, VY Meyerhofer, DD Radha, PB Regan, SP Sangster, TC Stoeckl, C Toscano, NC Frenje, JA Li, CK Petrasso, RD Seguin, FH Koch, JA AF Smalyuk, VA Delettrez, JA Dumanis, SB Epstein, R Glebov, VY Meyerhofer, DD Radha, PB Regan, SP Sangster, TC Stoeckl, C Toscano, NC Frenje, JA Li, CK Petrasso, RD Seguin, FH Koch, JA TI Hot-core characterization of direct-drive spherical cryogenic D-2 target implosion SO PHYSICS OF PLASMAS LA English DT Article ID CONFINEMENT FUSION-TARGETS; PARTICLE STOPPING POWERS; AREAL DENSITY; LASER SYSTEM; OMEGA; PERFORMANCE; PROFILES; PLASMAS AB A novel model to infer the hot-core temperature-density profiles in cryogenic deuterium capsule implosions is presented. The profiles are consistent with the measured primary deuterium-deuterium and secondary deuterium-tritium yields, the neutron-averaged ion temperature, and the x-ray image at peak neutron production. The electron pressure and the areal density of a neutron-producing region were inferred to be 2.7 +/- 0.4 Gbar and similar to 10 mg/cm(2), respectively. This new model introduces a more accurate hot-core characterization from previous techniques. (c) 2005 American Institute of Physics. C1 Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Dept Mech Engn, Rochester, NY 14623 USA. Univ Rochester, Dept Phys & Astron, Rochester, NY 14623 USA. Greece Arcadia High Sch, Rochester, NY 14612 USA. RP Smalyuk, VA (reprint author), Univ Rochester, Laser Energet Lab, 250 E River Rd, Rochester, NY 14623 USA. NR 20 TC 6 Z9 6 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 2005 VL 12 IS 5 AR 052706 DI 10.1063/1.1919427 PG 5 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200068 ER PT J AU Smirnov, A Raitses, Y Fisch, NJ AF Smirnov, A Raitses, Y Fisch, NJ TI Maximizing ion current by space-charge neutralization using negative ions and dust particles SO PHYSICS OF PLASMAS LA English DT Article ID PLASMA DISCHARGE; EXTRACTION; ELECTRON; SYSTEM; BEAMS AB Ion current extracted from an ion source (ion thruster) can be increased above the Child-Langmuir limit if the ion space charge is neutralized. Similarly, the limiting kinetic energy density of the plasma flow in a Hall thruster might be exceeded if additional mechanisms of space-charge neutralization are introduced. Space-charge neutralization with high-mass negative ions or negatively charged dust particles seems, in principle, promising for the development of a high current or high energy density source of positive light ions. Several space-charge neutralization schemes that employ heavy negatively charged particles are considered. It is shown that the proposed neutralization schemes can lead, at best, only to a moderate but nonetheless possibly important increase of the ion current in the ion thruster and the thrust density in the Hall thruster. (c) 2005 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Smirnov, A (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM asmirnov@pppl.gov NR 22 TC 4 Z9 5 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 2005 VL 12 IS 5 AR 053503 DI 10.1063/1.1897715 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200085 ER PT J AU Snipes, JA Basse, N Boswell, C Edlund, E Fasoli, A Gorelenkov, NN Granetz, RS Lin, L Lin, Y Parker, R Porkolab, M Sears, J Sharapov, S Tang, V Wukitch, S AF Snipes, JA Basse, N Boswell, C Edlund, E Fasoli, A Gorelenkov, NN Granetz, RS Lin, L Lin, Y Parker, R Porkolab, M Sears, J Sharapov, S Tang, V Wukitch, S TI Active and fast particle driven Alfven eigenmodes in Alcator C-Mod SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID FUSION ALPHA-PARTICLES; TOKAMAK PLASMAS; DIII-D; EXCITATION; WAVES; STABILITY; JT-60U; STABILIZATION; INSTABILITIES; ABSORPTION AB Alfven eigenmodes (AEs) are studied to assess their stability in high density reactor relevant regimes where T(i)approximate to T-e and as a diagnostic tool. Stable AEs are excited with active magnetohydrodynamics antennas in the range of the expected AE frequency. Toroidal Alfven eigenmode (TAE) damping rates between 0.5%)omega(A)/4q(2) across the entire plasma cross section. Plasmas that violate this stability criterion can suffer a RWM induced collapse within a few wall times. This critical rotation profile for stabilization is in agreement with drift-kinetic theory applied to low frequency magnetohydrodynamics modes [A. Bondeson and M. S. Chu, Phys. Plasmas 3, 3013 (1996)]. A toroidally symmetric array of internal sensors has been used to observe n=1-3 RWMs in NSTX. This array consists of B-p and B-r sensors both above and below the midplane at 12 toroidal locations instrumented to detect toroidal mode numbers of n=1-3. RWM perturbations exceeding 30 G have been measured with mode growth rates on the order of 5 ms. Small modes (delta B < 10 G) which cause minor drops in beta, with growth rates similar to 1500 s(-1) have been observed when beta(N) exceeds 6. Resonant field amplification of an externally applied error field by the stable RWM has been observed. (c) 2005 American Institute of Physics. C1 Columbia Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Chalmers, Inst Electromagnet Field Theory, S-41296 Gothenburg, Sweden. Univ Wisconsin, Madison, WI 53706 USA. Gen Atom Co, San Diego, CA 92186 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. RP Columbia Univ, Princeton Plasma Phys Lab, James Forrestal Campus, Princeton, NJ 08543 USA. RI Sabbagh, Steven/C-7142-2011; Stutman, Dan/P-4048-2015; OI Menard, Jonathan/0000-0003-1292-3286 NR 20 TC 34 Z9 35 U1 0 U2 2 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 2005 VL 12 IS 5 AR 056112 DI 10.1063/1.1883668 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200114 ER PT J AU Spong, DA AF Spong, DA TI Generation and damping of neoclassical plasma flows in stellarators SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID RADIAL ELECTRIC-FIELD; TOROIDAL PLASMAS; TRANSPORT-COEFFICIENTS; PHYSICS; IMPURITIES; MOMENTUM; ROTATION; TOKAMAK AB A moments method approach for stellarator transport is developed and applied to devices embodying the three forms (quasihelical, quasitoroidal, and quasipoloidal) of stellarator quasisymmetry. Plasma parameter regimes are considered that lead both to stable electron and ion ambipolar electric field roots. The predicted flux surface averaged plasma flow velocity components and their two-dimensional variation within a flux surface are calculated and they approximately reflect the underlying symmetries in the magnetic field structure. Comparison of the shearing rates of the flows with linear stability growth rates for the ion temperature gradient mode indicates that shearing rates (driven by ambipolar transport) can be comparable to growth rates even in the absence of external flow drive. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Spong, DA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Spong, Donald/C-6887-2012 OI Spong, Donald/0000-0003-2370-1873 NR 23 TC 45 Z9 45 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 2005 VL 12 IS 5 AR 056114 DI 10.1063/1.1887172 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200116 ER PT J AU Stephens, RB Hatchett, SP Tabak, M Stoeckl, C Shiraga, H Fujioka, S Bonino, M Nikroo, A Petrasso, R Sangster, TC Smith, J Tanaka, KA AF Stephens, RB Hatchett, SP Tabak, M Stoeckl, C Shiraga, H Fujioka, S Bonino, M Nikroo, A Petrasso, R Sangster, TC Smith, J Tanaka, KA TI Implosion hydrodynamics of fast ignition targets SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID FUSION; PERFORMANCE; DENSITY; OMEGA; GAIN AB The fast ignition (FI) concept requires the generation of a compact, dense, pure fuel mass accessible to an external ignition source. The current base line FI target is a shell fitted with a reentrant cone extending to near its center. Conventional direct- or indirect-drive collapses the shell near the tip of the cone and then an ultraintense laser pulse focused to the inside cone tip generates high-energy electrons to ignite the dense fuel. A theoretical and experimental investigation was undertaken of the collapse of such targets, validating modeling, and exploring the trade-offs available, in such an asymmetric geometry, to optimize compaction of the fuel and maintain the integrity of the cone. The collapse is complex. Away from the cone, the shell collapses much as does a conventional implosion, generating a hot, low-density inner core. But because of the open side, hot plasma exhausts out toward the tip of the cone. This hot plasma is advantageous for implosion diagnostics; it can provide protons for angular dependent measurements of the shell wall, neutrons for temperature measurements, and self-emission for contamination measurements. But for FI it is a liability; the hot, low-density inner core impedes the compaction of the cold fuel, lowering the implosion/burn efficiency and the gain. Approaches to optimizing this shell design are discussed. (c) 2005 American Institute of Physics. C1 Gen Atom Co, San Diego, CA 92186 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. Osaka Univ, Inst Laser Engn, Osaka 5650871, Japan. MIT, Cambridge, MA 02139 USA. RP Stephens, RB (reprint author), Gen Atom Co, San Diego, CA 92186 USA. RI Shiraga, Hiroyuki/I-9565-2015; Fujioka, Shinsuke/J-5530-2015; OI Fujioka, Shinsuke/0000-0001-8406-1772; Stephens, Richard/0000-0002-7034-6141 NR 16 TC 35 Z9 36 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 2005 VL 12 IS 5 AR 056312 DI 10.1063/1.1896952 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200141 ER PT J AU Swift, DC Tierney, TE Luo, SN Paisley, DL Kyrala, GA Hauer, A Greenfield, SR Koskelo, AC McClellan, KJ Lorenzana, HE Kalantar, D Remington, BA Peralta, P Loomis, E AF Swift, DC Tierney, TE Luo, SN Paisley, DL Kyrala, GA Hauer, A Greenfield, SR Koskelo, AC McClellan, KJ Lorenzana, HE Kalantar, D Remington, BA Peralta, P Loomis, E TI Dynamic response of materials on subnanosecond time scales, and beryllium properties for inertial confinement fusion SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID LASER; HUGONIOT; EQUATION; GOLD AB During the past few years, substantial progress has been made in developing experimental techniques capable of investigating the response of materials to dynamic loading on nanosecond time scales and shorter, with multiple diagnostics probing different aspects of the behavior. These relatively short time scales are scientifically interesting because plastic flow and phase changes in common materials with simple crystal structures-such as iron-may be suppressed, allowing unusual states to be induced and the dynamics of plasticity and polymorphism to be explored. Loading by laser-induced ablation can be particularly convenient: this technique has been used to impart shocks and isentropic compression waves from similar to 1 to 200 GPa in a range of elements and alloys, with diagnostics including line imaging surface velocimetry, surface displacement (framed area imaging), x-ray diffraction (single crystal and polycrystal), ellipsometry, and Raman spectroscopy. A major motivation has been the study of the properties of beryllium under conditions relevant to the fuel capsule in inertial confinement fusion: magnetically driven shock and isentropic compression shots at Z were used to investigate the equation of state and shock melting characteristics, complemented by laser ablation experiments to investigate plasticity and heterogeneous response from the polycrystalline microstructure. These results will help to constrain acceptable tolerances on manufacturing, and possible loading paths, for inertial fusion ignition experiments at the National Ignition Facility. Laser-based techniques are being developed further for future material dynamics experiments, where it should be possible to obtain high quality data on strength and phase changes up to at least 1 TPa. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Arizona State Univ, Tempe, AZ 85287 USA. RP Los Alamos Natl Lab, MS E526, Los Alamos, NM 87545 USA. EM dswift@lanl.gov RI Luo, Sheng-Nian /D-2257-2010 OI Luo, Sheng-Nian /0000-0002-7538-0541 NR 30 TC 18 Z9 20 U1 1 U2 7 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 2005 VL 12 IS 5 AR 056308 DI 10.1063/1.1876292 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200137 ER PT J AU Tabak, M Clark, DS Hatchett, SP Key, MH Lasinski, BF Snavely, RA Wilks, SC Town, RPJ Stephens, R Campbell, EM Kodama, R Mima, K Tanaka, KA Atzeni, S Freeman, R AF Tabak, M Clark, DS Hatchett, SP Key, MH Lasinski, BF Snavely, RA Wilks, SC Town, RPJ Stephens, R Campbell, EM Kodama, R Mima, K Tanaka, KA Atzeni, S Freeman, R TI Review of progress in fast ignition SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID LASER-SOLID INTERACTIONS; WEIBEL INSTABILITY; PROTON-BEAMS; ELECTRON; PLASMA; PULSES; TRANSPORT; DENSITY; TARGET; FUEL AB Marshall Rosenbluth's extensive contributions included seminal analysis of the physics of the laser-plasma interaction and review and advocacy of the inertial fusion program. Over the last decade he avidly followed the efforts of many scientists around the world who have studied Fast Ignition, an alternate form of inertial fusion. In this scheme, the fuel is first compressed by a conventional inertial confinement fusion driver and then ignited by a short (similar to 10 ps) pulse, high-power laser. Due to technological advances, such short-pulse lasers can focus power equivalent to that produced by the hydrodynamic stagnation of conventional inertial fusion capsules. This review will discuss the ignition requirements and gain curves starting from simple models and then describe how these are modified, as more detailed physics understanding is included. The critical design issues revolve around two questions: How can the compressed fuel be efficiently assembled? And how can power from the driver be delivered efficiently to the ignition region? Schemes to shorten the distance between the critical surface where the ignitor laser energy is nominally deposited and the ignition region will de discussed. The current status of Fast Ignition research is compared with our requirements for success. Future research directions will also be outlined. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Gen Atom, San Diego, CA 92121 USA. Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan. Univ Roma La Sapienza, Dipartimento Energet, I-00161 Rome, Italy. INFM, I-00161 Rome, Italy. Ohio State Univ, Columbus, OH USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. RI Atzeni, Stefano/F-5538-2012; Mima, Kunioki/H-9014-2016; Kodama, Ryosuke/G-2627-2016; OI Atzeni, Stefano/0000-0002-4339-2994; Stephens, Richard/0000-0002-7034-6141 NR 48 TC 109 Z9 112 U1 0 U2 11 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 2005 VL 12 IS 5 AR 057305 DI 10.1063/1.1871246 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200171 ER PT J AU Taylor, G Efthimion, PC LeBlanc, BP Carter, MD Caughman, JB Wilgen, JB Preinhaelter, J Harvey, RW Sabbagh, SA AF Taylor, G Efthimion, PC LeBlanc, BP Carter, MD Caughman, JB Wilgen, JB Preinhaelter, J Harvey, RW Sabbagh, SA TI Efficient coupling of thermal electron Bernstein waves to the ordinary electromagnetic mode on the National Spherical Torus Experiment SO PHYSICS OF PLASMAS LA English DT Article ID W7-AS STELLARATOR; OVERDENSE PLASMA; CONVERSION; EMISSION; EXCITATION; TOKAMAKS AB Efficient coupling of thermal electron Bernstein waves (EBW) to ordinary-mode (O-mode) electromagnetic radiation has been measured in plasmas heated by energetic neutral beams and high harmonic fast waves in the National Spherical Torus Experiment (NSTX) [M. Ono, S. Kaye, M. Peng , Proceedings of the 17th IAEA Fusion Energy Conference, edited by S. Spak (IAEA, Vienna, Austria, 1999), Vol. 3, p. 1135]. The EBW to electromagnetic mode coupling efficiency was measured to be 0.8 +/- 0.2, compared to a numerical EBW modeling prediction of 0.65. The observation of efficient EBW coupling to O mode, in relatively good agreement with numerical modeling, is a necessary prerequisite for implementing a proposed high power EBW current drive system on NSTX. (c) 2005 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EURATOM IPP CR Assoc, Inst Plasma Phys, Prague 18221, Czech Republic. CompX, Del Mar, CA 92014 USA. Columbia Univ, New York, NY 10027 USA. RP Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI Sabbagh, Steven/C-7142-2011; Preinhaelter, Josef/H-1394-2014; Caughman, John/R-4889-2016 OI Caughman, John/0000-0002-0609-1164 NR 28 TC 22 Z9 22 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 2005 VL 12 IS 5 AR 052511 DI 10.1063/1.1891065 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200055 ER PT J AU Thomas, DM Leonard, AW Groebner, RJ Osborne, TH Casper, TA Snyder, PB Lao, LL AF Thomas, DM Leonard, AW Groebner, RJ Osborne, TH Casper, TA Snyder, PB Lao, LL TI Measurement of edge currents in DIII-D and their implication for pedestal stability SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID H-MODE PEDESTAL; ITER SHAPE DISCHARGES; D TOKAMAK; BOOTSTRAP CURRENT; MAGNETIC-FIELD; ARBITRARY COLLISIONALITY; NEOCLASSICAL TRANSPORT; LOCALIZED MODES; CURRENT DRIVE; ASPECT-RATIO AB The present performance limits of tokamak discharges are strongly coupled to the stability and transport properties of the edge plasma. Both experimental and modeling efforts have shown a clear connection between the edge pressure pedestal height and core plasma confinement. The key to understanding the stability and performance limits of the pedestal revolves around an accurate knowledge of the plasma current in this region. Using the Zeeman effect in an injected 30 keV lithium beam, we have measured the currents in the edge of the DIII-D [J. L. Luxon, Nucl. Fusion 42, 6114 (2002)] tokamak for various confinement modes. This method of determining j(r) is insensitive to the large electric fields which coexist in the pedestal region and which complicate motional Stark effect measurements. For the high confinement cases, where substantial pedestal pressures exist, we find large (similar to MA/m(2)), localized (Delta R similar to 1-2 cm) currents in the pedestal region, located near the maximum in the pressure gradient. These values are consistent with calculations of edge bootstrap current using the neoclassical NCLASS [W. A. Houlberg, K. C. Shaing, S. P. Hirshman, and M. C. Zarnstorff, Phys. Plasmas 4, 3230 (1997)] and Sauter [O. Sauter, C. Angioni, and Y. R. Lin-Lin, Phys. Plasmas 6, 2834 (1999)] models and the measured pedestal density and temperature profiles. The apparent consistency of the measured j(EDGE) with neoclassical predictions occurs despite the violation of one of the fundamental tenets of the theory, namely, epsilon=rho(i)/L-P< 1, where rho(i) is the ion poloidal gyroradius and L-p is the pressure gradient scale length. The measured j(EDGE) has also been used to generate self-consistent reconstructions using the free boundary equilibrium solvers CORSICA [T. A. Casper, T. B. Kaiser, R. A. Jong, L. L. LoDestro, J. Moller, and L. D. Pearlstein, Plasma Phys. Controlled Fusion 45, 1193 (2003)] and EFIT [L. L. Lao, H. E. St. John, R. D. Stambough, A. G. Kellman, and W. Pfeiffer, Nucl. Fusion 25, 1611 (1985)]. These equilibria allow us, in conjunction with the edge localized instabilities in tokamak experiments [P. B. Snyder, H. R. Wilson, J. R. Ferron, L. L. Lao, A. W. Leonard, T. H. Osborne, A. D. Turnbull, D. Mossessian, M. Murakami, and X. Q. Xu, Phys. Plasmas 9, 2037 (2002); H. R. Wilson, P. B. Snyder, G. T. A. Huysmans, and R. L. Miller, Phys. Plasmas 9, 1277 (2002)] magnetohydrodynamic stability code, to assess the linear stability of the edge to peeling/ballooning modes. These results are then compared to the measured edge localized mode onset conditions and again good agreement is found between the experimental and model limits on the maximum permissible j(EDGE). (c) 2005 American Institute of Physics. C1 Gen Atom Co, San Diego, CA 92186 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Thomas, DM (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA. NR 48 TC 26 Z9 26 U1 1 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 2005 VL 12 IS 5 AR 056123 DI 10.1063/1.1879992 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200125 ER PT J AU van Milligen, BP Sanchez, R Carreras, BA Lynch, VE LaBombard, B Pedrosa, MA Hidalgo, C Goncalves, B Balbin, R AF van Milligen, BP Sanchez, R Carreras, BA Lynch, VE LaBombard, B Pedrosa, MA Hidalgo, C Goncalves, B Balbin, R CA W7-AS Team TI Additional evidence for the universality of the probability distribution of turbulent fluctuations and fluxes in the scrape-off layer region of fusion plasmas SO PHYSICS OF PLASMAS LA English DT Article ID ALCATOR-C-MOD; EDGE TURBULENCE; DIII-D; ELECTROSTATIC FLUCTUATIONS; INTERMITTENT CONVECTION; TOKAMAK; TRANSPORT; BOUNDARY; DEVICES; SYSTEMS AB Plasma density fluctuations and electrostatic turbulent fluxes measured at the scrape-off layer of the Alcator C-Mod tokamak [B. LaBombard, R. L. Boivin, M. Greenwald, J. Hughes, B. Lipschultz, D. Mossessian, C. S. Pitcher, J. L. Terry, and S. J. Zweben, Phys. Plasmas 8, 2107 (2001)], the Wendelstein 7-Advanced Stellarator [H. Renner, E. Anabitarte, E. Ascasibar , Plasma Phys. Controlled Fusion 31, 1579 (1989)], and the TJ-II stellarator [C. Alejaldre, J. Alonso, J. Botija , Fusion Technol. 17, 131 (1990)] are shown to obey a non-Gaussian but apparently universal (i.e., not dependent on device and discharge parameters) probability density distribution (pdf). The fact that a specific shape acts as an attractor for the pdf seems to suggest that emergent behavior and self-regulation are relevant concepts for these fluctuations. This shape is closely similar to the so-called Bramwell, Holdsworth, and Pinton distribution, which does not have any free parameters. (c) 2005 American Institute of Physics. C1 EURATOM, CIEMAT, Lab Nacl Fus, Madrid 28040, Spain. Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. EURATOM, CIEMAT, Lab Nacl Fus, Madrid 28040, Spain. EURATOM IST Assoc, P-1049001 Lisbon, Portugal. EURATOM, Max Planck Inst Plasmaphys, D-17491 Greifswald, Germany. RP EURATOM, CIEMAT, Lab Nacl Fus, Madrid 28040, Spain. RI Sanchez, Raul/C-2328-2008; Lynch, Vickie/J-4647-2012; van Milligen, Boudewijn/H-5121-2015; Goncalves, Bruno/H-8679-2012; Balbin, Rosa/F-8210-2010; Hidalgo, Carlos/H-6109-2015 OI Lynch, Vickie/0000-0002-5836-7636; van Milligen, Boudewijn/0000-0001-5344-6274; Goncalves, Bruno/0000-0003-0670-1214; Balbin, Rosa/0000-0001-5231-1300; NR 49 TC 38 Z9 38 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 2005 VL 12 IS 5 AR 052507 DI 10.1063/1.1884615 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200051 ER PT J AU Voitsekhovitch, I Garbet, X McDonald, DC Zastrow, KD Adams, M Baranov, Y Belo, P Bertalot, L Budny, R Conroy, S Cordey, JG Garzotti, L Mantica, P McCune, D Ongena, J Parail, V Popovichev, S Stork, D Whiteford, AD AF Voitsekhovitch, I Garbet, X McDonald, DC Zastrow, KD Adams, M Baranov, Y Belo, P Bertalot, L Budny, R Conroy, S Cordey, JG Garzotti, L Mantica, P McCune, D Ongena, J Parail, V Popovichev, S Stork, D Whiteford, AD CA JET EFDA Contributors TI Density dependence of trace tritium transport in H-mode Joint European Torus plasma SO PHYSICS OF PLASMAS LA English DT Article ID PARTICLE-TRANSPORT; DIII-D; COEFFICIENTS; DIFFUSION; TOKAMAKS; SUPRA; SIMULATIONS; INJECTION; ASDEX; SHEAR AB Tritium transport in edge localized mode (ELM) high confinement (H-mode) plasmas is analyzed here as a function of density for discharges from the recent trace tritium experimental campaign performed on Joint European Torus. In this campaign small amounts of tritium have been puffed or injected (with neutral beam injectors) into deuterium plasmas [K.-D. Zastrow, J. M. Adams, Yu. Baranov , Plasma Phys. Controlled Fusion 46, B255 (2004)]. Information about the tritium has been obtained from the evolution of the profiles of neutron emission simulated via the TRANSP [R. J. Goldston, D. C. McCune, H. H. Towner, S. L. Davis, R. J. Hawryluk, and G. L. Schmidt, J. Comput. Phys. 43, 61 (1981)] and SANCO (L. Lauro-Taroni, B. Alper, R. Giannella, K. Lawson, F. Marcus, M. Mattioli, P. Smeulders, and M. Von Hellermann, Proceedings of the 21st European Conference on Controlled Fusion and Plasma Physics, Montpelier, France, 1994) codes. A strong inverse correlation of tritium transport with plasma density is found in this analysis. The low tritium transport at high density is close to neoclassical values while the transport becomes strongly anomalous in low density plasmas. The thermal transport does not exhibit such a strong density dependence, leading to a varying ratio of thermal to tritium transport in these discharges. An interpretation of the density effects on the trace tritium transport, partially based on the test particle simulations in plasmas with stochastic magnetic field, is proposed. A simple model for the tritium diffusion coefficient and convective velocity, which includes the modification of the neoclassical particle diffusion in presence of electromagnetic turbulence [A. I. Smolyakov and P. N. Yushmanov, Nucl. Fusion 35, 383 (1993)] completed with an empirical density dependence, is developed. This model has positive beta dependence in agreement with the results of the similarity experiments performed for trace tritium transport. (c) 2005 American Institute of Physics. C1 UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. CEN Cadarache, EURATOM Assoc, F-13108 St Paul Les Durance, France. EURATOM IST Fus Assoc, Ctr Fusao Nucl, Lisbon, Portugal. EURATOM, ENEA Fus, Frascati, Italy. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Uppsala Univ, Dept Neutron Res, EURATOM VR Assoc, Uppsala, Sweden. EURATOM, ENEA Fus, Consorzio RFX, Padua, Italy. EURATOM, ENEA, CNR, Inst Fis Plasma, Milan, Italy. EURATOM, LPP ERM KMS, Brussels, Belgium. Univ Strathclyde, Dept Phys, Glasgow, Lanark, Scotland. RP UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. RI Mantica, Paola/K-3033-2012; OI Belo, Paula/0000-0001-5047-4392 NR 31 TC 9 Z9 9 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 2005 VL 12 IS 5 AR 052508 DI 10.1063/1.1895887 PG 12 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200052 ER PT J AU Wade, MR Burrell, KH Hogan, JT Leonard, AW Osborne, TH Snyder, PB Coster, D AF Wade, MR Burrell, KH Hogan, JT Leonard, AW Osborne, TH Snyder, PB Coster, D TI Edge impurity dynamics during an edge-localized mode cycle on DIII-D SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID CHARGE-EXCHANGE SPECTROSCOPY; RADIAL ELECTRIC-FIELD; L-H TRANSITION; D TOKAMAK; I ELMS; VELOCITY SHEAR; ASDEX-UPGRADE; TRANSPORT; CONFINEMENT; TURBULENCE AB Using high spatial and temporal resolution spectroscopy, direct measurements of the impurity dynamics during an edge-localized mode (ELM) cycle have revealed rich details of both the ELM event and the inter-ELM period. The increased transport associated with the ELM event is observed to affect all the particle species (electrons, ions, and impurities) in a similar manner over a wide range in plasma conditions. The density perturbation (and hence convective energy loss) is found to be insensitive to edge collisionality while the temperature perturbation (and hence conductive energy loss) decreases as the edge collisionality increases. Analysis of the response of the profiles to the ELM indicates that the initial response to the ELM is a rapid (< 0.5 ms) decrease in the impurity density in the high gradient region in the edge coincident with a brief increase in the temperature and rotation velocity, which then drop on a slightly longer time scale (similar to 1 ms) than the initial density decrease. Transport is then observed to continually improve as the E-r shear increases during the inter-ELM period. Analysis suggests that this correlation in conjunction with the loss of E-r shear at the ELM event may be the underlying reason for the decrease in the conductive loss as the edge collisonality is increased. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Gen Atom Co, San Diego, CA 92186 USA. Inst Plasma Phys, Garching, Germany. RP Wade, MR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Coster, David/B-4311-2010 OI Coster, David/0000-0002-2470-9706 NR 25 TC 27 Z9 27 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 2005 VL 12 IS 5 AR 056120 DI 10.1063/1.1891745 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200122 ER PT J AU White, R Chen, L Zonca, F AF White, R Chen, L Zonca, F TI Zonal flow dynamics and anomalous transport SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID TURBULENT TRANSPORT; MAGNETIC SHEAR; TOKAMAK; PLASMAS; DRIFT; CONFINEMENT; SIMULATIONS; WAVES AB Nonlinear equations for the slow space-time evolution of the radial drift wave-ion-temperature gradient (DW-ITG) envelope and zonal flow (ZF) amplitude have been derived within a coherent four-wave drift wave-zonal flow model. In the local limit this model demonstrates spontaneous generation of zonal flow and nonlinear drift wave-zonal flow dynamics in toroidal plasmas. The model allows slow temporal and spatial variations of the DW-ITG radial envelope, incorporating the effects of equilibrium variations, i.e., turbulence spreading and size dependence of the saturated wave intensities and transport coefficients. The competition between linear drive/damping and drift wave spreading due to linear and nonlinear group velocities and nonlinear energy transfer between DW and ZF determines the saturation levels of the fluctuating fields. The turbulence intensity level exhibits a transition from Bohm scaling at small system size (L-p/rho(i)) to gyro-Bohm for large system size. This system exhibits chaotic behavior and intermittency, depending on system size and proximity to marginal stability. (c) 2005 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China. CR Frascati, EURATOM Assoc, ENEA Fus, I-00044 Frascati, Italy. 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; Zonca, Fulvio/I-8236-2016 OI White, Roscoe/0000-0002-4239-2685; Zonca, Fulvio/0000-0002-9270-4704 NR 20 TC 6 Z9 6 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 2005 VL 12 IS 5 AR 057304 DI 10.1063/1.1898225 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200170 ER PT J AU Woodruff, S Cohen, BI Hooper, EB Mclean, HS Stallard, BW Hill, DN Holcomb, CT Romero-Talamas, C Wood, RD Cone, G Sovinec, CR AF Woodruff, S Cohen, BI Hooper, EB Mclean, HS Stallard, BW Hill, DN Holcomb, CT Romero-Talamas, C Wood, RD Cone, G Sovinec, CR TI Controlled and spontaneous magnetic field generation in a gun-driven spheromak SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 45th Annual Meetitng of the Division of Plasma Physics of the American-Physical-Society CY NOV, 2003 CL Albuquerque, NM SP Amer Phys Soc ID ENERGY CONFINEMENT; PLASMA; SUSTAINMENT; MAGNETOHYDRODYNAMICS; RECONNECTION; INJECTION; MODEL AB In the Sustained Spheromak Physics Experiment, SSPX [E. B. Hooper, D. Pearlstein, and D. D. Ryutov, Nucl. Fusion 39, 863 (1999)], progress has been made in understanding the mechanisms that generate fields by helicity injection. SSPX injects helicity (linked magnetic flux) from 1 m diameter magnetized coaxial electrodes into a flux-conserving confinement region. Control of magnetic fluctuations (delta B/B similar to 1% on the midplane edge) yields T-e profiles peaked at > 200 eV. Trends indicate a limiting beta (beta(e)similar to 4%-6%), and so we have been motivated to increase T-e by operating with stronger magnetic field. Two new operating modes are observed to increase the magnetic field: (A) Operation with constant current and spontaneous gun voltage fluctuations. In this case, the gun is operated continuously at the threshold for ejection of plasma from the gun: stored magnetic energy of the spheromak increases gradually with delta B/B similar to 2% and large voltage fluctuations (delta V similar to 1 kV), giving a 50% increase in current amplification, I-tor/I-gun. (B) Operation with controlled current pulses. In this case, spheromak magnetic energy increases in a stepwise fashion by pulsing the gun, giving the highest magnetic fields observed for SSPX (similar to 0.7 T along the geometric axis). By increasing the time between pulses, a quasisteady sustainment is produced (with periodic good confinement), comparing well with resistive magnetohydrodynamic simulations. In each case, the processes that transport the helicity into the spheromak are inductive and exhibit a scaling of field with current that exceeds those previously obtained. We use our newly found scaling to suggest how to achieve higher temperatures with a series of pulses. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. CALTECH, Pasadena, CA 91125 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Woodruff, S (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 30 TC 12 Z9 12 U1 2 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 2005 VL 12 IS 5 AR 052502 DI 10.1063/1.1878772 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200046 ER PT J AU Wukitch, SJ Lin, Y Parisot, A Wright, JC Bonoli, PT Porkolab, M Basse, N Edlund, E Hubbard, A Lin, L Lynn, A Marmar, E Mossessian, D Phillips, P Schilling, G AF Wukitch, SJ Lin, Y Parisot, A Wright, JC Bonoli, PT Porkolab, M Basse, N Edlund, E Hubbard, A Lin, L Lynn, A Marmar, E Mossessian, D Phillips, P Schilling, G TI Ion cyclotron range of frequency mode conversion physics in Alcator C-Mod: Experimental measurements and modeling SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID TORE-SUPRA TOKAMAK; FULL-WAVE; HEATING EXPERIMENTS; BERNSTEIN WAVES; RECENT PROGRESS; PLASMAS; PROFILE; TFTR; JET AB In ion cyclotron range of frequency experiments, we have simultaneously measured the incident fast wave and the mode converted waves in the mode conversion region in D(He-3) plasmas using an upgraded phase contrast imaging diagnostic in the Alcator C-Mod tokamak [I. H. Hutchinson, R. Boivin, F. Bombarida , Phys. Plasmas 1, 1511 (1994)]. To experimentally validate the full wave TORIC [M. Brambilla, Nucl. Fusion 38, 1805 (1998)] physics kernel, the simulated power deposition and line integrated perturbed density profiles were compared with experimental profiles and are found to be in remarkably good agreement with the experimentally determined profiles. This suggests the physics model and computation algorithm used in TORIC, particularly for the mode converted waves, model the mode conversion physics well. We also report results from initial mode conversion current drive experiments where the modification of the sawtooth period was clearly observed and was shown to depend on antenna phasing suggesting the presence of a localized driven current. (c) 2005 American Institute of Physics. C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Univ Texas, Fus Res Ctr, Austin, TX 78712 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA. RI Lin, Yijun/B-5711-2009; Lin, Liang/H-2255-2011; OI Basse, Nils/0000-0002-4513-8869 NR 49 TC 25 Z9 25 U1 0 U2 2 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 2005 VL 12 IS 5 AR 056104 DI 10.1063/1.1866142 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200106 ER PT J AU Zhang, S Intrator, TP Wurden, GA Waganaar, WJ Taccetti, JM Renneke, R Grabowski, C Ruden, EL AF Zhang, S Intrator, TP Wurden, GA Waganaar, WJ Taccetti, JM Renneke, R Grabowski, C Ruden, EL TI Confinement analyses of the high-density field-reversed configuration plasma in the field-reversed configuration experiment with a liner SO PHYSICS OF PLASMAS LA English DT Article ID MAGNETIZED TARGET FUSION; PARTICLE LIFETIME MEASUREMENTS; THETA-PINCH PLASMA; LARGE S-EXPERIMENT; AXIAL DYNAMICS; FRX-L; STABILITY; MODEL; FLUX; IGNITION AB The focus of the field-reversed configuration (FRC) experiment with a liner (FRX-L) is the formation of a target FRC plasma for magnetized target fusion experiments. An FRC plasma with density of 10(23) m(-3), total temperature in the range of 150-300 eV, and a lifetime of approximate to 20 mu s is desired. Field-reversed theta-pinch technology is used with programed cusp fields at theta-coil ends to achieve non-tearing field line reconnections during FRC formation. Well-formed FRCs with density between (2-4)x10(22) m(-3), lifetime in the range of 15-20 mu s, and total temperature between 300-500 eV are reproducibly created. Key FRC parameters have standard deviation in the mean of 10% during consecutive shots. The FRCs are formed at 50 mTorr deuterium static fill using 2 kG net reversed bias field inside the theta-coil confinement region, with external main field unexpectedly ranging between 15-30 kG. The high-density FRCs confinement properties are approximately in agreement with empirical scaling laws obtained from previous experiments with fill pressure mostly less than 20 mTorr. Analyses in this paper reveal that reducing the external main field modulation and/or extending the theta-coil length in the FRX-L device are critical in achieving higher FRC parameters for application in magnetized target fusion. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sci Applicat Int Corp, Albuquerque, NM 87106 USA. USAF, Res Lab, Kirtland AFB, NM 87117 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM sy_zhang66@hotmail.com RI Wurden, Glen/A-1921-2017 OI Wurden, Glen/0000-0003-2991-1484 NR 38 TC 10 Z9 10 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 2005 VL 12 IS 5 AR 052513 DI 10.1063/1.1899648 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200057 ER PT J AU Zhou, Y Matthaeus, WH AF Zhou, Y Matthaeus, WH TI Phenomenology treatment of magnetohydrodynamic turbulence with nonequipartition and anisotropy SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID ENERGY-DISSIPATION RATE; SOLAR-WIND; INERTIAL-RANGE; 2-DIMENSIONAL MAGNETOHYDRODYNAMICS; ISOTROPIC TURBULENCE; REYNOLDS-NUMBER; PRANDTL NUMBER; SCALES; SIMULATIONS; TRANSPORT AB Magnetohydrodynamics (MHD) turbulence theory, often employed satisfactorily in astrophysical applications, has often focused on parameter ranges that imply nearly equal values of kinetic and magnetic energies and length scales. However, MHD flow may have disparity magnetic Prandtl number, dissimilar kinetic and magnetic Reynolds number, different kinetic and magnetic outer length scales, and strong anisotropy. Here a phenomenology for such "nonequipartitioned" MHD flow is discussed. Two conditions are proposed for a MHD flow to transition to strong turbulent flow, which are extensions of (i) Taylor's constant flux in an inertial range and (ii) Kolmogorov's scale separation between the large and small scale boundaries of an inertial range. For this analysis, the detailed information on turbulence structure is not needed. These two conditions for MHD transition are expected to provide consistent predictions and should be applicable to anisotropic MHD flows, after the length scales are replaced by their corresponding perpendicular components. Second, it is stressed that the dynamics and anisotropy of MHD fluctuations are controlled by the relative strength between the straining effects between eddies of similar size and the sweeping action by the large eddies, or propagation effect of the large-scale magnetic fields, on the small scales, and analysis of this balance, in principle, also requires consideration of nonequipartition effects. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 53 TC 12 Z9 12 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 2005 VL 12 IS 5 AR 056503 DI 10.1063/1.1887187 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200150 ER PT J AU Zinkle, SJ AF Zinkle, SJ TI Fusion materials science: Overview of challenges and recent progress SO PHYSICS OF PLASMAS LA English DT Article; Proceedings Paper CT 46th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society CY NOV 15-19, 2004 CL Savannah, GA SP Amer Phys Soc ID AUSTENITIC STAINLESS-STEELS; STACKING-FAULT TETRAHEDRON; CASCADE DAMAGE CONDITIONS; DISLOCATION-DEFECT INTERACTIONS; LOW-TEMPERATURE IRRADIATION; RESEARCH-AND-DEVELOPMENT; POLYCRYSTALLINE METALS; COPPER-ALLOYS; MICROSTRUCTURAL EVOLUTION; ACTIVATION MATERIALS AB A brief review is given of fundamental materials science concepts important for development of structural materials for fusion energy systems. Particular attention is placed on displacement damage effects associated with the unique deuterium-tritium fusion environment. Recent examples of multiscale materials modeling results (closely coupled with experimental studies) are summarized. Fundamental differences in the behavior of body centered cubic versus face centered cubic crystal structures are highlighted. Finally, a brief overview is given of the high-performance reduced-activation materials being developed by fusion. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. OI Zinkle, Steven/0000-0003-2890-6915 NR 94 TC 130 Z9 136 U1 5 U2 35 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 2005 VL 12 IS 5 AR 058101 DI 10.1063/1.1880013 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 928MQ UT WOS:000229276200172 ER PT J AU McDonald, JC Coursey, BM Carter, M AF McDonald, JC Coursey, BM Carter, M TI Radioactive sources may enter US illegally - Reply SO PHYSICS TODAY LA English DT Letter C1 Pacific NW Natl Lab, Richland, WA USA. US Dept Homeland Secur, Washington, DC USA. RP McDonald, JC (reprint author), Pacific NW Natl Lab, Richland, WA USA. EM joe.macdonald@pnl.gov 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 2005 VL 58 IS 5 BP 16 EP 16 PG 1 WC Physics, Multidisciplinary SC Physics GA 924CP UT WOS:000228956600007 ER PT J AU Bishop, AR Gubernatis, JE Saxena, A AF Bishop, AR Gubernatis, JE Saxena, A TI James Arthur Krumhansl - Obituary SO PHYSICS TODAY LA English DT Biographical-Item C1 Los Alamos Natl Lab, Los Alamos, NM USA. RP Bishop, AR (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 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 2005 VL 58 IS 5 BP 81 EP 82 DI 10.1063/1.1995758 PG 2 WC Physics, Multidisciplinary SC Physics GA 924CP UT WOS:000228956600027 ER PT J AU Ferrieri, RA Gray, DW Babst, BA Schueller, MJ Schlyer, DJ Thorpe, MR Orians, CM Lerdau, M AF Ferrieri, RA Gray, DW Babst, BA Schueller, MJ Schlyer, DJ Thorpe, MR Orians, CM Lerdau, M TI Use of carbon-11 in Populus shows that exogenous jasmonic acid increases biosynthesis of isoprene from recently fixed carbon SO PLANT CELL AND ENVIRONMENT LA English DT Article DE Populus; carbon-11; DOXP pathway; isoprene emissions; jasmonic acid ID VOLATILE ORGANIC-COMPOUNDS; EMISSION RATE; GENE-EXPRESSION; 1-DEOXY-D-XYLULOSE-5-PHOSPHATE PATHWAY; BIOGENIC HYDROCARBONS; LEAVES; PLANTS; OZONE; SYNTHASE; QUERCUS AB A new approach for pulse labelling of plants using the short-lived positron emitting radioisotope carbon-11 (half-life: 20.4 min) as (CO2)-C-11 is reported together with its application to measuring [C-11]isoprene emissions from intact leaves capturing information associated with: (1) rate of emission; (2) the relative contribution of recently fixed carbon to isoprene biosynthesis; and (3) the transit time for tracer movement through the leaf and biochemical pathways associated with isoprene biosynthesis. This approach was applied to study the response of certain Populus species to exogenous treatments of jasmonic acid (JA), a plant hormone implicated in signal transduction linked to defence response against herbivory. Twelve hours after treatment of single intact leaves of aspen (Populus tremuloides) with a 1 mm JA spray, isoprene emissions from those leaves increased 1.5 times the controls from 35.4 +/- 2.2 to 53.1 +/- 4.8 nmol m(-2) s(-1). [C-11]Isoprene emissions from the same leaves, reflecting the isoprene that was derived from recently fixed carbon, increased much more, to 2.2 times the controls. This increase coincided with a change in emitted [C-11]isoprene from 0.31 to 0.68% of C-11 fixed in the leaf tissue, while the tracer transit time remained constant at 12.5 min. These results suggest that JA had no effect on enzyme kinetics involved in isoprene biosynthesis, but did impact the source of recent carbon feeding that pathway. Studies with poplar (Populus nigra clone NC 5271) showed similar trends in systemic emissions (from an untreated leaf on the same plant). C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269 USA. Tufts Univ, Dept Biol, Medford, MA 02155 USA. SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794 USA. RP Ferrieri, RA (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM rferrieri@bnl.gov RI Lerdau, Manuel/E-7320-2011; OI Lerdau, Manuel/0000-0003-1864-0834; Babst, Benjamin/0000-0001-5657-0633 NR 71 TC 36 Z9 37 U1 0 U2 8 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0140-7791 J9 PLANT CELL ENVIRON JI Plant Cell Environ. PD MAY PY 2005 VL 28 IS 5 BP 591 EP 602 DI 10.1111/j.1365-3040.2004.01303.x PG 12 WC Plant Sciences SC Plant Sciences GA 917SE UT WOS:000228488700003 ER PT J AU Del-Castillo-Negrete, D AF Del-Castillo-Negrete, D TI .Coherent structures in the plasma wave-particle interaction SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 12th International Congress on Plasma Physics (ICPP2004) CY OCT 25-29, 2004 CL Nice, FRANCE SP Int Advisory Comm ID ON-TAIL INSTABILITY; NONLINEAR-INTERACTION; SINGLE-MODE; SATURATION; BEAM; TRANSITION; DYNAMICS; REGIME; IONS AB A study of phase space coherent structures in the plasma wave-particle interaction is presented. The study is based on a reduced single wave model (SWM) of the Vlasov-Poisson system. The reduced model describes the weakly nonlinear dynamics of generic electrostatic instabilities and incorporates the self-consistent wave-particle interaction through a mean field that couples the resonant particles to the amplitude of a single wave potential. Following a brief review of the SWM, we show numerical evidence of trapped and untrapped hole-clump dipole states for both symmetric and weakly asymmetric initial conditions. The rotation (in the trapped case) and translation (in the untrapped case) of the dipole manifest as periodic (in the case of symmetric states) and quasi-periodic (in the case of asymmetric states) time dependences of the potential that gives rise to self-consistent chaos. The role of chaotic mixing and hyperbolic-elliptic bifurcations in the relaxation of initial conditions far from equilibrium is also discussed. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Del-Castillo-Negrete, D (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM delcastillod@ornl.gov OI del-Castillo-Negrete, Diego/0000-0001-7183-801X NR 28 TC 3 Z9 3 U1 3 U2 7 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 2005 VL 47 SU 5A SI SI BP A53 EP A63 DI 10.1088/0741-3335/47/5A/005 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 932YQ UT WOS:000229591100006 ER PT J AU Remington, BA AF Remington, BA TI High energy density laboratory astrophysics SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 12th International Congress on Plasma Physics (ICPP2004) CY OCT 25-29, 2004 CL Nice, FRANCE SP Int Advisory Comm ID SUPERNOVA REMNANT SIMULATIONS; EQUATION-OF-STATE; COLLISIONLESS SHOCK; MAGNETIC-FIELDS; INTENSE LASERS; LIQUID DEUTERIUM; SOLID DEUTERIUM; GIANT PLANETS; PROTON-BEAMS; FAST-IGNITER AB High energy density (HED) physics refers broadly to the study of macroscopic collections of matter under extreme conditions of temperature and density. The experimental facilities most widely used for these studies are high-power lasers and magnetic-pinch generators. The HED physics pursued at these facilities is still in its infancy, yet new regimes of experimental science are emerging. Examples from astrophysics include work relevant to planetary interiors, supernovae, astrophysical jets and acicreting compact objects (such as neutron stars and black holes). In this paper, we review a selection of recent results in this new field of HED laboratory astrophysics and provide a brief look ahead to the coming decade. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Remington, BA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 74 TC 28 Z9 29 U1 0 U2 6 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 2005 VL 47 SU 5A SI SI BP A191 EP A203 DI 10.1088/0741-3335/47/5A/014 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 932YQ UT WOS:000229591100015 ER PT J AU Rognlien, TD AF Rognlien, TD TI Understanding of edge plasmas in magnetic fusion energy devices SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 12th International Congress on Plasma Physics (ICPP2004) CY OCT 25-29, 2004 CL Nice, FRANCE SP Int Advisory Comm ID SCRAPE-OFF-LAYER; L-H TRANSITION; ELECTRIC-FIELDS; TOKAMAK; TRANSPORT; PEDESTAL; TURBULENCE; SIMULATION; STABILITY; IMPURITIES AB A limited overview is given of the theoretical understanding of edge plasmas in fusion devices. This plasma occupies the thin region between the hot core plasma and material walls in magnetic confinement devices. The region is typically formed by a change in magnetic topology from close magnetic field lines (i.e. the core region) and open field lines that contact material surfaces (i.e. the scrape-off layer (SOL)), with the most common example being magnetically diverted tokamaks. The physics of this region is determined by the complex interaction of plasma with neutral species in the presence of plasma turbulence, and impurity radiation is often an important component. Recent advances in modelling strong, intermittent micro-turbulent edge-plasma transport are given, as is the closely coupled self-consistent evolution of the edge-plasma profiles in tokamaks. In addition, selected new results are given for the characterization of edge-plasmas behaviour in the areas of edge-pedestal relaxation and SOL transport via edge-localized modes, impurity formation including dust and magnetic field-line stochasticity at the edge of tokamaks. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 54 TC 16 Z9 16 U1 1 U2 3 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 2005 VL 47 SU 5A SI SI BP A283 EP A295 DI 10.1088/0741-3335/47/5A/020 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 932YQ UT WOS:000229591100021 ER PT J AU Diamond, PH Itoh, SI Itoh, K Hahm, TS AF Diamond, PH Itoh, SI Itoh, K Hahm, TS TI Zonal flows in plasma - a review SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Review ID DRIFT-WAVE TURBULENCE; ELECTRON-TEMPERATURE GRADIENT; H-MODE TRANSITION; SELF-ORGANIZED CRITICALITY; EXCITED STRONG TURBULENCE; E-X-B; POLOIDAL SPIN-UP; LOW-BETA PLASMA; HEAVY-ION BEAM; T-IIU TOKAMAK AB A comprehensive review of zonal flow phenomena in plasmas is presented. While the emphasis is on zonal flows in laboratory plasmas, planetary zonal flows are discussed as well. The review presents the status of theory, numerical simulation and experiments relevant to zonal flows. The emphasis is on developing an integrated understanding of the dynamics of drift wave-zonal flow turbulence by combining detailed studies of the generation of zonal flows by drift waves, the back-interaction of zonal flows on the drift waves, and the various feedback loops by which the system regulates and organizes itself. The implications of zonal flow phenomena for confinement in, and the phenomena of fusion devices are discussed. Special attention is given to the comparison of experiment with theory and to identifying directions for progress in future research. C1 Univ Calif San Diego, La Jolla, CA 92093 USA. Kyushu Univ, Inst Appl Mech, Kasuga, Fukuoka 8168580, Japan. Natl Inst Fus Sci, Toki 5095292, Japan. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Univ Calif San Diego, La Jolla, CA 92093 USA. RI Kyushu, RIAM/F-4018-2015; U-ID, Kyushu/C-5291-2016 NR 423 TC 964 Z9 973 U1 14 U2 100 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 2005 VL 47 IS 5 BP R35 EP R161 DI 10.1088/0741-3335/47/5/R01 PG 127 WC Physics, Fluids & Plasmas SC Physics GA 931OV UT WOS:000229495500001 ER PT J AU Contreras, MA Ramanathan, K AbuShama, J Hasoon, F Young, DL Egaas, B Noufi, R AF Contreras, MA Ramanathan, K AbuShama, J Hasoon, F Young, DL Egaas, B Noufi, R TI Diode (characteristics in state-of-the-art ZnO/CdS/Cu(In(1-x)Gax)Se-2 solar cells SO PROGRESS IN PHOTOVOLTAICS LA English DT Article DE diode quality factor; saturation current; thin-film solar cells; world record efficiency; recombination; Cu(In,Ga)Se-2 ID THIN-FILMS; EFFICIENCY; CU(IN,GA)SE-2; DEVICE AB We report a new state of the art in thin-film polyctystalline Cu(In, Ga)Se-2-based solar cells with the attainment of energy conversion efficiencies of 19.5 %. An analysis of the performance of Cu(InGa)Se-2 solar cells in terms of some absorber properties and other derived diode parameters is presented. The analysis reveals that the highest-performance cells can be associated with absorber bandgap values of similar to 144eV, resulting in devices with the lowest values of diode saturation current density (similar to 3 x 10(-8) mA/cm(2)) and diode quality factors in the range 1-30 < A < 1.35. The data presented also support arguments of a reduced space charge region recombination as the reason for the improvement in the performance of such devices. In addition, a discussion is presented regarding the dependence of performance on energy bandgap, with an emphasis on wide-bandgap Cu(In,Ga)Se-2 materials and views toward improving efficiency to > 20 % in thin-film polycrystalline Cu(InGa)Se-2 solar cells. Published in 2005 by John Wiley W Sons, Ltd. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. EM miguel_contreras@nrel.gov NR 20 TC 467 Z9 485 U1 8 U2 70 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 1062-7995 EI 1099-159X J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD MAY PY 2005 VL 13 IS 3 BP 209 EP 216 DI 10.1002/pip.626 PG 8 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 918RB UT WOS:000228564200004 ER PT J AU Studier, FW AF Studier, FW TI Protein production by auto-induction in high-density shaking cultures SO PROTEIN EXPRESSION AND PURIFICATION LA English DT Article DE auto-induction; T7 expression system; lactose; pBAD promoter; arabinose; protein production; high-density batch cultures; metabolic control of pH; selenomethionine labeling; isotopic labeling ID HIGH-LEVEL EXPRESSION; GLUCOSE-LACTOSE DIAUXIE; T7 RNA-POLYMERASE; ESCHERICHIA-COLI; LAC REPRESSOR; STRUCTURAL GENOMICS; GENE-EXPRESSION; ARABAD PROMOTER; ACETYL-COENZYME; CLONED GENES AB Inducible expression systems in which T7 RNA polymerase transcribes coding sequences cloned under control of a T7lac promoter efficiently produce a wide variety of proteins in Escherichia coli. Investigation of factors that affect stability, growth, and induction of T7 expression strains in shaking vessels led to the recognition that sporadic, unintended induction of expression in complex media, previously reported by others, is almost certainly caused by small amounts of lactose. Glucose prevents induction by lactose by well-studied mechanisms. Amino acids also inhibit induction by lactose during log-phase growth, and high rates of aeration inhibit induction at low lactose concentrations. These observations, and metabolic balancing of pH, allowed development of reliable non-inducing and auto-inducing media in which batch cultures grow to high densities. Expression strains grown to saturation in non-inducing media retain plasmid and remain fully viable for weeks in the refrigerator, making it easy to prepare many freezer stocks in parallel and use working stocks for an extended period. Auto-induction allows efficient screening of many clones in parallel for expression and solubility, as cultures have only to be inoculated and grown to saturation, and yields of target protein are typically several-fold higher than obtained by conventional IPTG induction. Auto-inducing media have been developed for labeling proteins with selenomethionine, N-15 or C-13, and for production of target proteins by arabinose induction of T7 RNA polymerase from the pBAD promoter in BL21-AI. Selenomethionine labeling was equally efficient in the commonly used methionine auxotroph B834(DE3) (found to be metE) or the prototroph BL21(DE3). Published by Elsevier Inc. C1 Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Studier, FW (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. EM studier@bnl.gov FU NIGMS NIH HHS [P50 GM062529-05] NR 44 TC 2232 Z9 2350 U1 36 U2 390 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1046-5928 J9 PROTEIN EXPRES PURIF JI Protein Expr. Purif. PD MAY PY 2005 VL 41 IS 1 BP 207 EP 234 DI 10.1016/j.pep.2005.01.016 PG 28 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA 918RI UT WOS:000228564900025 PM 15915565 ER PT J AU Iwahara, J Peterson, RD Clubb, RT AF Iwahara, J Peterson, RD Clubb, RT TI Compensating increases in protein backbone flexibility occur when the Dead ringer AT-rich interaction domain (ARID) binds DNA: A nitrogen-15 relaxation study SO PROTEIN SCIENCE LA English DT Article DE AT-rich interaction domain; ARID; protein-DNA interaction; NMR; backbone dynamics; N-15-relaxation; Dead ringer protein ID ANISOTROPIC ROTATIONAL DIFFUSION; COLI RIBONUCLEASE HI; CHEMICAL-EXCHANGE; NMR RELAXATION; CROSS-CORRELATION; MOLECULAR-DYNAMICS; SPIN RELAXATION; HUMAN UBIQUITIN; SEQUENCE; DIPOLAR AB AT-rich interaction domains (ARIDs) are found in a large number of eukaryotic transcription factors that regulate cell proliferation, differentiation, and development. Previously we elucidated how ARIDs recognize DNA by determining the solution structure of the Drosophila melanogaster Dead ringer protein in both its DNA-free and -bound states. In order to quantitatively determine how ARIDs alter their mobility to recognize DNA, we have measured the relaxation parameters of the backbone nitrogen-15 nuclei of Dead ringer in its free and bound forms, and interpreted these data using the model-free approach. We show that Dead ringer undergoes significant changes in its mobility upon binding, with residues in the loop connecting helices H5 and H6 becoming immobilized in the major groove and contacts to the minor groove slowing down the motion of residues at the C terminus. A DNA-induced rotation and displacement of the N-terminal subdomain of the protein increases the mobility of helix HI located distal to the DNA interface and may partially negate the entropic cost of immobilizing interfacial residues. Elevated motions on the micro- to millisecond timescale in the N-terminal domain prior to DNA binding appear to foreshadow the DNA-induced conformation change. C1 Univ Calif Los Angeles, Dept Chem & Biochem, UCLA DOE Inst Genom & Proteom, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, Inst Mol Biol, Los Angeles, CA 90095 USA. RP Clubb, RT (reprint author), Univ Calif Los Angeles, Dept Chem & Biochem, UCLA DOE Inst Genom & Proteom, 405 Hilgard Ave, Los Angeles, CA 90095 USA. EM rclubb@tobi.ucla.edu OI Iwahara, Junji/0000-0003-4732-2173 FU NIGMS NIH HHS [R01 GM57487, R01 GM057487] NR 52 TC 4 Z9 4 U1 0 U2 0 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD MAY PY 2005 VL 14 IS 5 BP 1140 EP 1150 DI 10.1110/ps.041154405 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 919CC UT WOS:000228594900003 PM 15802641 ER PT J AU Ahram, M Strittmatter, EF Monroe, ME Adkins, JN Hunter, JC Miller, JH Springer, DL AF Ahram, M Strittmatter, EF Monroe, ME Adkins, JN Hunter, JC Miller, JH Springer, DL TI Identification of shed proteins from Chinese hamster ovary cells: Application of statistical confidence using human and mouse protein databases SO PROTEOMICS LA English DT Article DE cross-species database searches; discriminant score; low-close irradiation; protein abundance; protein shedding; tandem and Fourier transform-ion cyclotron resonance mass spectrometry ID NECROSIS-FACTOR-ALPHA; TANDEM MASS-SPECTROMETRY; CONVERTING-ENZYME TACE; X-RAYS; RECEPTOR; SURFACE; PROTEOLYSIS; SEQUENCE; CLEAVAGE; DAMAGE AB The shedding process releases ligands, receptors, and other proteins from the surface of the cell and is a mechanism whereby cells communicate. Even though altered regulation of this process has been implicated in several diseases, global approaches to evaluate shed proteins have not been developed. A goal of this study was to identify global changes in shed proteins in media taken from cells exposed to low-doses of radiation to develop a fundamental understanding of the bystander response. Chinese hamster ovary cells were chosen because they have been widely used for radiation studies and are reported to respond to radiation by releasing factors into the media that cause genomic instability and cytotoxicity in unexposed cells, i.e., a bystander effect. Media samples taken for irradiated cells were evaluated using a combination of tandem- and Fourier transform-ion cyclotron resonance (FT-ICR)-mass spectrometry (MS) analyses. Since the hamster genome has not been sequenced, MS data was searched against the mouse and human protein databases. Nearly 150 proteins identified by tandem mass spectrometry were confirmed by FT-ICR. When both types of MS data were evaluated, using a new confidence scoring tool based on discriminant analyses, about 500 proteins were identified. Approximately 20% of these identifications were either integral membrane proteins or membrane associated proteins, suggesting that they were derived from the cell surface and, hence were likely shed. However, estimates of quantitative changes, based on two independent MS approaches, did not identify any protein abundance changes attributable to the bystander effect. Results from this study demonstrate the feasibility of global evaluation of shed proteins using MS in conjunction with cross-species protein databases and that significant improvement in peptide/protein identifications is provided by the confidence scoring tool. C1 Washington State Univ Tricities, Sch Elect Engn & Computat Sci, Richland, WA USA. RP Springer, DL (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999,Mail Stop K4-12, Richland, WA 99354 USA. EM david.springer@pnl.gov RI Adkins, Joshua/B-9881-2013 OI Adkins, Joshua/0000-0003-0399-0700 NR 33 TC 10 Z9 10 U1 0 U2 0 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 2005 VL 5 IS 7 BP 1815 EP 1826 DI 10.1002/pmic.200401072 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 929CZ UT WOS:000229321000009 PM 15815987 ER PT J AU Zhang, CG Gonzales, AD Choi, MW Chromy, BA Fitch, JP McCutchen-Maloney, SL AF Zhang, CG Gonzales, AD Choi, MW Chromy, BA Fitch, JP McCutchen-Maloney, SL TI Subcellular proteomic analysis of host-pathogen interactions using human monocytes exposed to Yersinia pestis and Yersinia pseudotuberculosis SO PROTEOMICS LA English DT Article DE biomarkers; host responso; subcellular proteomics; two-dimensional fluorescence difference gel electrophoresis; Yersinia ID OXIDIZED PROTEIN HYDROLASE; VALOSIN-CONTAINING PROTEIN; ENDOPLASMIC-RETICULUM; SIGNALING PATHWAYS; MEMBRANE-PROTEINS; ESCHERICHIA-COLI; BINDING PROTEIN; RNA EXPRESSION; CELL-ADHESION; LON PROTEASE AB Yersinia pestis, the etiological agent of plague, is of concern to human health both from an infectious disease and a biodefense perspective. While Y. pestis and Yersinia pseudotuberculosis share more than 90% DNA homology, they have significantly different clinical manifestations. Plague is often fatal if untreated, yet Y. pseudotuberculosis causes severe intestinal distress but is rarely fatal. A better understanding of host response to these closely related pathogens may help explain the different mechanisms of virulence and pathogenesis that result in such different clinical outcomes. The aim of this study was to characterize host protein expression changes in human monocyte U937 cells after exposure to Y. pestis and Y. pseudotuberculosis. In order to gain global proteomic coverage of host response, proteins from cytoplasmic, nuclear and membrane fractions of host cells were studied by two-dimensional differential gel electrophoresis and relative protein expression differences were quantitated. Differentially expressed proteins, with at least 1.5-fold expression changes and p values of 0.01 or less, were identified by mass spectrometry including matrix-assisted laser desorption/ionization-MS or liquid chromatography tandem mass spectrometry. With these criteria, differential expression was detected in 16 human proteins after Y. pestis exposure and 13 human proteins after Y pseudotuberculosis exposure, of which only two of the differentially expressed proteins identified were shared between the two exposures. Proteins identified in this study are reported to be involved in a wide spectrum of cellular functions and host defense mechanisms including apoptosis, cytoskeletal rearrangement, protein synthesis and degradation, DNA replication and transcription, metabolism, protein folding, and cell signaling. Notably, the differential expression patterns observed can distinguish the two pathogen exposures from each other and from unexposed host cells. The functions of the differentially expressed proteins identified provide insight on the different virulence and pathogenic mechanisms of Y pestis and Y pseudotuberculosis. C1 Lawrence Livermore Natl Lab, Biodef Div, Chem & Biol Natl Secur Program, Livermore, CA 94550 USA. RP McCutchen-Maloney, SL (reprint author), Lawrence Livermore Natl Lab, Biodef Div, Chem & Biol Natl Secur Program, L-452,4000 East Ave, Livermore, CA 94550 USA. EM smaloney@llnl.gov NR 67 TC 16 Z9 16 U1 1 U2 4 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 2005 VL 5 IS 7 BP 1877 EP 1888 DI 10.1002/pmic.200401083 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 929CZ UT WOS:000229321000015 PM 15825148 ER PT J AU De Zorzi, P Barbizzi, S Belli, M Ciceri, G Fajgelj, A Moore, D Sansone, U Van der Perk, M AF De Zorzi, P Barbizzi, S Belli, M Ciceri, G Fajgelj, A Moore, D Sansone, U Van der Perk, M TI Terminology in soil sampling - (IUPAC Recommendations 2005) SO PURE AND APPLIED CHEMISTRY LA English DT Article DE soil; sampling; recommendations; analytical chemistry; terminology; Division V AB The scientist must be sure that, within a stated context, the terms used in articles, publications, or the daily conversation among colleagues are intended by all in the same precise way, without any possible ambiguity. As already pointed out by "Nomenclature for sampling in analytical chemistry (IUPAC Recommendations 1990)" [4], it is not acceptable that scientists are not able to orient themselves in a sampling or analytical process. This can occur if the terms used are not well defined. Moreover, to better appreciate the development of new theories or concepts, progressive updates can be necessary. To this end, on the basis of the existing terminology documents and of the most recent knowledge in the field of soil sampling, an updated terminology in sampling (specifically, soil sampling) is recommended. C1 IAEA, Agcy Labs Seibersdorf & Vienna, A-1400 Vienna, Austria. Agenzia Protez Ambiente & Serv Tecn, Serv Metrol Ambientale, I-00128 Rome, Italy. CESI Spa, Business Unit Environm, I-20134 Milan, Italy. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Utrecht, Fac Geog Sci, Dept Phys Geog, NL-3508 Utrecht, Netherlands. RP Fajgelj, A (reprint author), IAEA, Agcy Labs Seibersdorf & Vienna, Wagramer Str 5, A-1400 Vienna, Austria. NR 6 TC 16 Z9 16 U1 0 U2 1 PU INT UNION PURE APPLIED CHEMISTRY PI RES TRIANGLE PK PA 104 TW ALEXANDER DR, PO BOX 13757, RES TRIANGLE PK, NC 27709-3757 USA SN 0033-4545 J9 PURE APPL CHEM JI Pure Appl. Chem. PD MAY PY 2005 VL 77 IS 5 BP 827 EP 841 DI 10.1351/pac200577050827 PG 15 WC Chemistry, Multidisciplinary SC Chemistry GA 929EN UT WOS:000229325000003 ER PT J AU Pederson, DC Peteet, DM Kurdyla, D Guilderson, T AF Pederson, DC Peteet, DM Kurdyla, D Guilderson, T TI Medieval Warming, Little Ice Age, and European impact on the environment during the last millennium in the lower Hudson Valley, New York, USA SO QUATERNARY RESEARCH LA English DT Article DE pollen; charcoal; climate; Medieval Warming; Little Ice Age; land use; Hudson Valley; Phragmites; Typha ID ESTUARINE SEDIMENT ACCUMULATION; NEW-ENGLAND; CHESAPEAKE BAY; UNITED-STATES; TIDAL MARSH; SOUTHERN CONNECTICUT; HOLOCENE VEGETATION; NORTH-AMERICA; NEW-JERSEY; CLIMATE AB Establishing natural climate variability becomes particularly important in large urban areas in anticipation of droughts. We present a welldated bi-decadal record of vegetation, climate, land use, and fire frequency from a tidal marsh in the Hudson River Estuary. The classic Medieval Warm Period is evident through striking increases in charcoal and Pinus dominance from &SIM; 800-1300 A.D., paralleling paleorecords southward along the Atlantic seaboard. Higher inputs of inorganic sediment during this interval suggest increased watershed erosion during drought conditions. The presence of the Little Ice Age ensues with increases in Picea and Tsuga, coupled with increasing organic percentages due to cooler, moister conditions. European impact is manifested by a decline in arboreal pollen due to land clearance, increased weedy plant cover (i.e., Ambrosia, Plantago, and Rumex), and an increase in inorganic particles to the watershed. © 2005 University of Washington. All rights reserved. C1 Lamont Doherty Earth Observ, Palisades, NY 10964 USA. NASA, Goddard Inst Space Studies, New York, NY 10025 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. RP Pederson, DC (reprint author), Lamont Doherty Earth Observ, 61 Rte 9W, Palisades, NY 10964 USA. EM dcp@ldeo.columbia.edu NR 76 TC 70 Z9 72 U1 3 U2 24 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0033-5894 J9 QUATERNARY RES JI Quat. Res. PD MAY PY 2005 VL 63 IS 3 BP 238 EP 249 DI 10.1016/j.yqres.2005.01.001 PG 12 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA 923ZE UT WOS:000228947300003 ER PT J AU Rydberg, B Cooper, B Cooper, PK Holley, WR Chatterjee, A AF Rydberg, B Cooper, B Cooper, PK Holley, WR Chatterjee, A TI Dose-dependent misrejoining of radiation-induced DNA double-strand breaks in human fibroblasts: Experimental and theoretical study for high- and low-LET radiation SO RADIATION RESEARCH LA English DT Article ID HEAT-LABILE SITES; CHEF ELECTROPHORESIS; MAMMALIAN-CELLS; CHROMOSOMES; CORRECT; ENDS; FRAGMENTS; REPAIR; MODEL; IONS AB Misrejoining of DNA double-strand breaks (DSBs) was measured in human primary fibroblasts after exposure to X rays and high-LET particles (helium, nitrogen and iron) in the dose range 10-80 Gy. To measure joining of wrong DNA ends, the integrity of a 3.2-Mbp restriction fragment was analyzed directly after exposure and after 16 h of repair incubation. It was found that the misrejoining frequency for X rays was nonlinearly related to dose, with less probability of misrejoining at low doses than at high doses. The dose dependence for the high-LET particles, on the other hand, was closer to being linear, with misrejoining frequencies higher than for X rays, particularly at the lower doses. These experimental results were simulated with a Monte Carlo approach that includes a cell nucleus model with all 46 chromosomes present, combined with realistic track structure simulations to calculate the geometrical positions of all DSBs induced for each dose. The model assumes that the main determinant for misrejoining probability is the distance between two simultaneously present DSBs. With a Gaussian interaction probability function with distance, it was found that the data for both low- and high-LET radiation could be fitted with an interaction distance (sigma of the Gaussian curve) of 0.25 mu m. This is half the distance previously found to best fit chromosomal aberration data in human lymphocytes using the same methods (Holley et al., Radiat. Res. 158, 568-580, 2002). The discrepancy may indicate inadequacies in the chromosome model, for example insufficient chromosomal overlap, but may also be partly due to differences between fibroblasts and lymphocytes. (c) 2005 by Radiation Research Society. C1 Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Rydberg, B (reprint author), Lawrence Berkeley Natl Lab, Div Life Sci, Bldg 74-157,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM berydberg@lbl.gov FU NCI NIH HHS [CA80207] NR 21 TC 31 Z9 32 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 2005 VL 163 IS 5 BP 526 EP 534 DI 10.1667/RR3346 PG 9 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 918TO UT WOS:000228570700007 PM 15850414 ER PT J AU Bean, AS Chapas, R Collins, MJ Kingon, AI AF Bean, AS Chapas, R Collins, MJ Kingon, AI TI Nanoscience and technology: Firms take first steps SO RESEARCH-TECHNOLOGY MANAGEMENT LA English DT Editorial Material C1 N Carolina State Univ, Coll Management, Ctr Innovat Management Studies, Raleigh, NC 27695 USA. Battelle Pacific NW Natl Lab, Richland, WA USA. Air Prod & Chem Inc, Corp Sci & Technol Ctr, Allentown, PA USA. N Carolina State Univ, Technol Commercializat Programs, Raleigh, NC USA. RP Bean, AS (reprint author), N Carolina State Univ, Coll Management, Ctr Innovat Management Studies, Raleigh, NC 27695 USA. EM al_bean@ncsu.edu; richard.chapas@pnl.gov; collinm1@airproducts.com; angus_kingon@ncsu.edu NR 0 TC 2 Z9 2 U1 0 U2 0 PU INDUSTRIAL RESEARCH INSTITUTE, INC PI ARLINGTON PA 2200 CLARENDON BLVD, STE 1102, ARLINGTON, VA 22201 USA SN 0895-6308 J9 RES TECHNOL MANAGE JI Res.-Technol. Manage. PD MAY-JUN PY 2005 VL 48 IS 3 BP 3 EP 7 PG 5 WC Business; Engineering, Industrial; Management SC Business & Economics; Engineering GA 005GU UT WOS:000234811400002 ER PT J AU Baker, KL AF Baker, KL TI Least-squares wave-front reconstruction of Shack-Hartmann sensors and shearing interferometers using multigrid techniques SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ELECTRON-DENSITY CHARACTERIZATION; PHASE-DIFFERENCE; ADAPTIVE OPTICS; PLASMA; LASER AB This article details a multigrid algorithm that is suitable for least-squares wave-front reconstruction of Shack-Hartmann and shearing interferometer wave-front sensors. The algorithm detailed in this article is shown to scale with the number of subapertures in the same fashion as fast Fourier transform techniques, making it suitable for use in applications requiring a large number of subapertures and high Strehl ratio systems such as for high spatial frequency characterization of high-density plasmas, optics metrology, and multiconjugate and extreme adaptive optics systems. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA USA. RP Lawrence Livermore Natl Lab, Livermore, CA USA. EM baker@llnl.gov NR 21 TC 7 Z9 7 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0034-6748 EI 1089-7623 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAY PY 2005 VL 76 IS 5 AR 053502 DI 10.1063/1.1896622 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 925PF UT WOS:000229064300019 ER PT J AU Funsten, HO Harper, RW McComas, DJ AF Funsten, HO Harper, RW McComas, DJ TI Absolute detection efficiency of space-based ion mass spectrometers and neutral atom imagers SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID FOILS AB Space-based ion mass spectrometers and neutral atom imagers often utilize a thin foil for generation of secondary electrons and employ a coincidence measurement between detection of the secondary electrons and detection of the primary ion or neutral atom, allowing unambiguous detection of the particle in a large noise background and determination of properties of the particle using time-of-flight measurement. We demonstrate a simple and straightforward method for laboratory calibration and in situ quantification and monitoring of the absolute detection probabilities of the detectors and the absolute detection efficiency of the detector subsystem without knowledge of the incident particle flux. © 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. SW Res Inst, San Antonio, TX 78228 USA. RP Funsten, HO (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Funsten, Herbert/A-5702-2015 OI Funsten, Herbert/0000-0002-6817-1039 NR 11 TC 16 Z9 16 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAY PY 2005 VL 76 IS 5 AR 053301 DI 10.1063/1.1889465 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 925PF UT WOS:000229064300012 ER PT J AU Lipp, MJ Evans, WJ Yoo, CS AF Lipp, MJ Evans, WJ Yoo, CS TI Cryogenic loading of large volume presses for high-pressure experimentation and synthesis of novel materials SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID NEUTRON-DIFFRACTION; GPA; CO; NITROGEN; LITHIUM AB We present an efficient, easily implemented method for loading cryogenic fluids in a large volume press. We specifically apply this method to the high-pressure synthesis of an extended solid derived from CO using a Paris-Edinburgh cell. This method employs cryogenic cooling of Bridgman-type WC anvils well insulated from other press components, condensation of the load gas within a brass annulus surrounding the gasket between the Bridgman anvils. We demonstrate the viability of the described approach by synthesizing macroscopic amounts (several milligrams) of polymeric CO-derived material, which were recovered to ambient conditions after compression of pure CO to 5 GPa or above. © 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, H Div, Livermore, CA 94551 USA. RP Lipp, MJ (reprint author), Lawrence Livermore Natl Lab, H Div, POB 5508, Livermore, CA 94551 USA. EM lipp1@llnl.gov NR 16 TC 5 Z9 5 U1 3 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAY PY 2005 VL 76 IS 5 AR 053903 DI 10.1063/1.1900644 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 925PF UT WOS:000229064300040 ER PT J AU Pynn, R Fitzsimmons, MR Fritzsche, H Gierlings, M Major, J Jason, A AF Pynn, R Fitzsimmons, MR Fritzsche, H Gierlings, M Major, J Jason, A TI Neutron spin echo scattering angle measurement (SESAME) SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID GRAZING-INCIDENCE; SURFACE AB We describe experiments in which the neutron spin echo technique is used to measure neutron scattering angles. We have implemented the technique, dubbed spin echo scattering angle measurement (SESAME), using thin films of Permalloy electrodeposited on silicon wafers as sources of the magnetic fields within which neutron spins precess. With 30-μ m-thick films we resolve neutron scattering angles to about 0.02&DEG; with neutrons of 4.66 A wavelength. This allows us to probe correlation lengths up to 200 nm in an application to small angle neutron scattering. We also demonstrate that SESAME can be used to separate specular and diffuse neutron reflection from surfaces at grazing incidence. In both of these cases, SESAME can make measurements at higher neutron intensity than is available with conventional methods because the angular resolution achieved is independent of the divergence of the neutron beam. Finally, we discuss the conditions under which SESAME might be used to probe in-plane structure in thin films and show that the method has advantages for incident neutron angles close to the critical angle because multiple scattering is automatically accounted for. © 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Natl Res Council Canada, Chalk River Labs, SIMS, Chalk River, ON K0J 1P0, Canada. Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany. Max Planck Inst Met Res, D-70569 Stuttgart, Germany. RP Pynn, R (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Lujan Center, LANL/G-4896-2012; OI Fritzsche, Helmut/0000-0001-5288-8302 NR 21 TC 19 Z9 19 U1 0 U2 6 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 2005 VL 76 IS 5 AR 053902 DI 10.1063/1.1884187 PG 15 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 925PF UT WOS:000229064300039 ER PT J AU Brady, MP Sachenko, P AF Brady, MP Sachenko, P TI Effects of Fe on the oxidation/internal nitridation behavior and tensile properties of Cr and oxide dispersion ductilized Cr SO SCRIPTA MATERIALIA LA English DT Article DE ductility; chromium; oxidation; ODS; refractory metals ID CHROMIUM; NITROGEN; ALLOYS AB The addition of Fe to Cr and to oxide dispersion ductilized Cr alloys modified, but did not eliminate subscale internal nitridation on oxidation in air. The addition of 45 wt.% Fe increased the room-temperature tensile yield strength of Cr-6MgO from similar to225 MPa to similar to650 MPa, while still exhibiting 1-1.5% tensile elongation. (C) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Met Ceram, Oak Ridge, TN 37831 USA. RP Brady, MP (reprint author), Oak Ridge Natl Lab, Div Met Ceram, Oak Ridge, TN 37831 USA. EM bradymp@ornl.gov RI Brady, Michael/A-8122-2008 OI Brady, Michael/0000-0003-1338-4747 NR 13 TC 6 Z9 6 U1 0 U2 3 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 MAY PY 2005 VL 52 IS 9 BP 809 EP 814 DI 10.1016/j.scriptamat.2005.01.019 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 902YW UT WOS:000227393600001 ER PT J AU Brady, MP Liu, CT Zhu, JH Tortorelli, PF Walker, LR AF Brady, MP Liu, CT Zhu, JH Tortorelli, PF Walker, LR TI Effects of Fe additions on the mechanical properties and oxidation behavior of Cr2Ta Laves phase reinforced Cr SO SCRIPTA MATERIALIA LA English DT Article DE Laves phases; refractory metals; toughness; oxidation; chromium ID ALLOYS; CHROMIUM; COMPOSITES AB The addition of Fe to Cr-Cr2Ta eutectic alloys increased ambient fracture toughness from a maximum of 12-14 to 18-21 MPa m(1/2). The elevated-temperature yield strength was depressed, but still reached >250 MPa at 1000 degreesC. The Fe additions also resulted in a potentially beneficial change in oxidation mechanism from Cr2N subscale formation to internal oxidation. (C) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Tennessee Technol Univ, Dept Mech Engn, Cookeville, TN 38505 USA. RP Brady, MP (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. EM bradymp@ornl.gov RI Brady, Michael/A-8122-2008; Tortorelli, Peter/E-2433-2011 OI Brady, Michael/0000-0003-1338-4747; NR 15 TC 13 Z9 16 U1 1 U2 2 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 MAY PY 2005 VL 52 IS 9 BP 815 EP 819 DI 10.1016/j.scriptamat.2005.01.016 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 902YW UT WOS:000227393600002 ER PT J AU Elmer, JW Palmer, TA Babu, SS Specht, ED AF Elmer, JW Palmer, TA Babu, SS Specht, ED TI Low temperature relaxation of residual stress in Ti-6Al-4V SO SCRIPTA MATERIALIA LA English DT Article DE X-ray diffraction; synchrotron radiation; thermal activation; diffusion; lattice parameters ID IN-SITU OBSERVATIONS; X-RAY-DIFFRACTION; PHASE-TRANSFORMATION; TITANIUM-ALLOYS; ALPHA-PHASE; TRANSITIONS; EXPANSION AB Isothermal tests were performed on Ti-6Al-4V to observe time-dependent changes in the lattice parameter of the a (hexagonal close-packed) and beta (body-centered cubic) phases. Synchrotron-based experiments show contraction in beta at temperatures below 550 degrees C, and expansion at higher temperatures. Contraction results from annealing of preexisting residual stresses, while expansion results from V diffusion when the alpha -> beta phase transformation becomes kinetically active. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, CMS, Livermore, CA 94551 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Elmer, JW (reprint author), Lawrence Livermore Natl Lab, CMS, 7000 East Ave, Livermore, CA 94551 USA. EM elmer1@llnl.gov RI Babu, Sudarsanam/D-1694-2010; Specht, Eliot/A-5654-2009 OI Babu, Sudarsanam/0000-0002-3531-2579; Specht, Eliot/0000-0002-3191-2163 NR 12 TC 13 Z9 13 U1 6 U2 23 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 MAY PY 2005 VL 52 IS 10 BP 1051 EP 1056 DI 10.1016/j.scriptamat.2005.01.021 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 909HN UT WOS:000227851100019 ER PT J AU Huber, DL AF Huber, DL TI Synthesis, properties, and applications of iron nanoparticles SO SMALL LA English DT Review DE catalysis; iron; magnetic properties; nanoparticles; synthesis ID ASSEMBLED MONOLAYER COATINGS; COLLOIDAL COBALT PARTICLES; MAGNETIC-PROPERTIES; AMORPHOUS IRON; SONOCHEMICAL SYNTHESIS; ULTRASOUND RADIATION; METAL NANOPARTICLES; FEPT NANOPARTICLES; CHEMICAL-SYNTHESIS; KINETICS AB Iron, the most ubiquitous of the transition metals and the fourth most plentiful element in the Earth's crust, is the structural backbone of our modern infrastructure. It is therefore ironic that as a nanoparticle, iron has been somewhat neglected in favor of its own oxides, as well as other metals such as cobalt, nickel, gold, and platinum. This is unfortunate, but understandable. Iron's reactivity is important in macroscopic applications (particularly rusting), but is a dominant concern at the nanoscale. Finely divided iron has long been known to be pyrophoric, which is a major reason that iron nanoparticles have not been more fully studied to date. This extreme reactivity has traditionally made iron nanoparticles difficult to study and inconvenient for practical applications. Iron however has a great deal to offer at the nanoscale, including very potent magnetic and catalytic properties. Recent work has begun to take advantage of iron's potential, and work in this field appears to be blossoming. C1 Sandia Natl Labs, Nanostruct & Adv Mat Chem Dept, Albuquerque, NM 87185 USA. RP Huber, DL (reprint author), Sandia Natl Labs, Nanostruct & Adv Mat Chem Dept, POB 5800,MS 1421, Albuquerque, NM 87185 USA. EM dlhuber@sandia.gov RI Wei, Zhanhua/D-7544-2013; Huber, Dale/A-6006-2008 OI Wei, Zhanhua/0000-0003-2687-0293; Huber, Dale/0000-0001-6872-8469 NR 100 TC 625 Z9 642 U1 68 U2 604 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1613-6810 J9 SMALL JI Small PD MAY PY 2005 VL 1 IS 5 BP 482 EP 501 DI 10.1002/smll.200500006 PG 20 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 926IY UT WOS:000229118100001 PM 17193474 ER PT J AU Wo, JPG Jardine, PM AF Wo, JPG Jardine, PM TI CdEDTA(2-) adsorpt ion to weathered shale-limestone saprolite: Modeling the adsorption mechanism and effect of al-oxide co-dissollition on fe-oxide dissolution dynamics SO SOIL SCIENCE LA English DT Article DE saprolite; CdEDTA; adsorption; oxide dissolution; interfacial reaction model ID METAL-EDTA COMPLEXES; POROUS-MEDIA; TRANSPORT; GEOCHEMISTRY; MIGRATION; CHROMATE; BEDROCK; SOILS AB Partially weathered bedrocks that retain the fabric and structure of the parent rocks, commonly-known as saprolite, exist extensively in the subsurface. A large quantity of Fe-, Al- and Mn-oxides is often present in saprolite soils. These surface oxides are very important in promoting and regulating geochemical reactions in the subsurface. The objective of this research is to identify and characterize the mechanisms of CdEDTA(2-) surface complexation in a saprolite derived from a shale-limestone bedrock on the Oak Ridge Reservation of the US Department of Energy. CdEDTA(2-) is a compound of two widely used industrial, chemicals. As a result of the complexation of Cd and EDTA, the mobility of Cd is largely increased. This has had grave implications to the environment and the industrial facilities,that use EDTA as a chelating agent for various purposes. The existence of Fe- and Al-oxides in, the saprolite with highly pH-buffered soil solutions may result in the co-dissolution of Fe and Al oxides under the influences of pH and EDTA. In this research, a series of laboratory batch experiments was conducted with varying initial concentrations of CdEDTA(2-) in the presence of the saprolite. Three surface complexation mechanisms were evaluated in terms of their likelihood of describing the dynamics of CdEDTA(2-). adsorption and oxide dissolution. The modeling results verified a previous hypothesis that the formation rate of AlEDTA(-) was faster than that of FeEDTA(-), largely because of the much larger initial concentration of Al ions in the soil solution. The subsequent CdEDTA(2-) dissociation and acid-promoted Al-oxide dissolution was thus identified as mechanisms that may interfere or inhibit the transformation of a surface CdEDTA(2-) ternary complex to FeEDTA(-) and explain the slower formation rate of FeEDTA(-). It was concluded that acid-promoted dissolution of amorphous Al-oxide may exert certain degree of control on the dissolution dynamics of amorphous Fe-oxide. C1 Univ Maryland, Dept Civil & Environm Engn, Baltimore, MD 21201 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Wo, JPG (reprint author), Univ Maryland, Dept Civil & Environm Engn, Baltimore, MD 21201 USA. EM jgwo@umbc.edu NR 33 TC 0 Z9 0 U1 0 U2 5 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA TWO COMMERCE SQ, 2001 MARKET ST, PHILADELPHIA, PA 19103 USA SN 0038-075X EI 1538-9243 J9 SOIL SCI JI Soil Sci. PD MAY PY 2005 VL 170 IS 5 BP 325 EP 339 DI 10.1097/01.ss.0000169907.79614.3f PG 15 WC Soil Science SC Agriculture GA 938QT UT WOS:000230018600002 ER PT J AU Blanco-Canqui, H Lal, R Owens, LB Post, WM Izaurralde, RC AF Blanco-Canqui, H Lal, R Owens, LB Post, WM Izaurralde, RC TI Strength properties and organic carbon of soils in the North Appalachian region SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID LONG-TERM TILLAGE; PHYSICAL-PROPERTIES; SHEAR-STRENGTH; PEDOTRANSFER FUNCTIONS; MANURE APPLICATIONS; MINIMUM TILLAGE; CORN PRODUCTION; IRRIGATED SOIL; CONE INDEX; LOAM SOIL AB Soil strength influenced by management and soil properties controls plant growth, root development, and soil-moisture relations. The impact of textural and structural parameters on soil strength is moderated by soil organic C (SOC) concentration. Therefore, the objectives of this study were to assess differences in soil strength and SOC concentration in watersheds under long-term (> 15 yr) management practices in the North Appalachian region on a predominantly Typic Hapludults on undulating slopes (> 6% slope). Seven watersheds without field replication under moldboard plow (MP), chisel plow, disk with beef cattle manure (DiskM), no-till with beef cattle manure (NTm), no-till with no beef cattle manure (NTnm), pasture, and forest were studied. Cone index (0), shear strength, bulk density (p(b)), volumetric moisture content (θ(v)), and SOC concentration were determined at the summit, backslope, and footslope landscape positions at the 0- to 10-, 10- to 20-, and 20- to 30-cm depths. The SOC concentration was slightly higher at the footslope than at the summit position in the cultivated watersheds. The P-b was lower at the footslope than at the summit in NTm (1.22 vs. 1.42 Mg m(-3)) and chisel (1.34 vs. 1.47 Mg m(-3)) treatments. Forest had the lowest CI (0.19 MPa), shear strength (6.11 kPa), and P-b (0.93 Mg m(-3)) and the highest SOC concentration (62.7 g kg(-1)), whereas NIP had the highest CI (0.67 MPa), shear strength (25.5 kPa), p(b) (1.44 Mg m(-3)), and the lowest SOC concentration (13.6 g kg(-1)) in the 0- to 10-cm depth (P < 0.01). The SOC concentration in NTm was 1.7 times higher than that in NTnm, and both no-till treatments had lower P-b (< 1.21 Mg m(-3)) than MP (1.44 Mg m(-3)) at 0- to 10-cm depth (P < 0.01). Manuring decreased both CI and shear strength, but increased SOC concentration. The p(b), θ(v), and SOC concentration were potential predictors of Cl; whereas p(b) and SOC concentration were of shear strength (r(2) > 0.42; P < 0.01). Results show that landscape positions had small effect, but management, particularly manuring, had large and significant effects on soil strength and SOC concentration. C1 Ohio State Univ Hosp, Sch Nat Resources, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA. USDA ARS, N Appalachian Expt Watersheds, Coshocton, OH 43812 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Univ Maryland, Joint Global Change Res Inst, College Pk, MD 20740 USA. RP Blanco-Canqui, H (reprint author), Ohio State Univ Hosp, Sch Nat Resources, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA. EM blanco.16@osu.edu RI Post, Wilfred/B-8959-2012; Izaurralde, Roberto/E-5826-2012; Lal, Rattan/D-2505-2013 NR 52 TC 30 Z9 32 U1 0 U2 17 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 2005 VL 69 IS 3 BP 663 EP 673 DI 10.2136/sssaj2004.0254 PG 11 WC Soil Science SC Agriculture GA 924VV UT WOS:000229009800012 ER PT J AU Jhi, SH Roundy, DJ Louie, SG Cohen, ML AF Jhi, SH Roundy, DJ Louie, SG Cohen, ML TI Formation and electronic properties of double-walled boron nitride nanotubes SO SOLID STATE COMMUNICATIONS LA English DT Article DE boron nitride; nanotubes; interwall; electronic structure ID BN NANOTUBES; CARBON NANOTUBES; ROPES AB The electronic and structural properties of double-walled boron nitride (BN) nanotubes are studied using the first principle pseudopotential density functional method. It is shown that zigzag-type tubes have a larger formation energy for the double-walled configuration than the armchair-type structure, and that interwall stacking plays a significant role for intertube interactions and in the formation of multiwall BN nanotubes. The fundamental energy gap of double-walled BN nanotubes was found to be smaller than that of single-walled tubes mostly due to band shift. It is shown that the electronic properties of double-walled BN tubes exhibit a slight but noticeable difference for the zigzag and armchair type tubes studied. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Phys, Div Sci Mat, Berkeley, CA 94720 USA. Cornell Univ, Dept Phys, Ithaca, NY 14853 USA. RP Jhi, SH (reprint author), Pohang Univ Sci & Technol, Dept Phys, San 31 Hyojadong, Pohang 790784, South Korea. EM jhish@civet.berkeley.edu; droundy@physics.berkeley.edu; sglouie@uclink.berkeley.edu; mlcohen@uclink.berkeley.edu NR 20 TC 39 Z9 39 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD MAY PY 2005 VL 134 IS 6 BP 397 EP 402 DI 10.1016/j.ssc.2005.02.007 PG 6 WC Physics, Condensed Matter SC Physics GA 922QR UT WOS:000228853400005 ER PT J AU Park, S Lee, Y Si, W Vogt, T AF Park, S Lee, Y Si, W Vogt, T TI Synthesis and structure of the monolayer hydrate K0.3CoO2 center dot 0.4H(2)O SO SOLID STATE COMMUNICATIONS LA English DT Article DE K0.3CoO2 center dot 0.4H(2)O; monolayer hydrate; structure; synthesis ID COBALT OXIDE; SUPERCONDUCTIVITY; REFINEMENT; LAYERS; PHASE AB The monolayer hydrate (MLH) K0.3CoO2 center dot 0.4H(2)O Was synthesized from K0.6CoO2 by extracting K+ cations using K2S2O8 as an oxidant and the subsequent intercalation of water between the layers of edge-sharing CoO6 octahedra. A hexagonal structure (space group P6(3)/mmc) with lattice parameters a = 2.8262(1) A, c = 13.8269(6) A similar to the MLH Na-0.36 CoO(2)center dot 0.7H(2)O was established using high-resolution synchrotron X-ray powder diffraction data. The K/H2O layer in the K-MLH is disordered, which is in contrast to the Na-MLH. At low temperatures metallic and paramagnetic behavior was found. (c) 2005 Elsevier Ltd. All rights reserved. C1 Brookhaven Natl Lab, Phys Dept, Upton, NY 11973 USA. RP Vogt, T (reprint author), Brookhaven Natl Lab, Phys Dept, Upton, NY 11973 USA. EM tvogt@bnl.gov RI Vogt, Thomas /A-1562-2011; Lee, Yongjae/K-6566-2016 OI Vogt, Thomas /0000-0002-4731-2787; NR 18 TC 5 Z9 5 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD MAY PY 2005 VL 134 IS 9 BP 607 EP 611 DI 10.1016/j.ssc.2005.03.007 PG 5 WC Physics, Condensed Matter SC Physics GA 931LU UT WOS:000229487600006 ER PT J AU Hu, JZ Kwak, JH Herrera, JE Wang, Y Peden, CHF AF Hu, JZ Kwak, JH Herrera, JE Wang, Y Peden, CHF TI Line narrowing in H-1 MAS spectrum of mesoporous silica by removing adsorbed H2O using N-2 SO SOLID STATE NUCLEAR MAGNETIC RESONANCE LA English DT Article DE solid-state NMR; H-1 MAS; hydrogen bond; silanol; water; tungsten hydroxyl; SBA-15; nitrogen; tungsten oxide catalyst ID MAGNETIC-RESONANCE SPECTROSCOPY; NMR-SPECTROSCOPY; SOLID CATALYSTS; PROTON NMR; RESOLUTION; DEHYDRATION; LIMITATIONS; SURFACE AB The peaks for silanol protons in the high-resolution H-1 NMR spectrum obtained on mesoporous silica materials may be broadened and shifted downfield by hydrogen bonding with adsorbed water molecules. Overlapping of the resonance for hydrogenbonded silanol with the corresponding broad peak due to hydrogen-bonded water may further complicate the spectrum. These complications hamper a quantitative analysis of the spectra for these and similar materials. It is demonstrated in this paper that adsorbed water can be removed by exposing the sample to dry N-2 during magic angle spinning. This results in significant line narrowing for the silanol protons in the H-1 MAS spectrum. The enhanced spectral resolution makes it possible to quantify the various hydroxyl groups in a complex metal-oxide catalyst. Results obtained on tungsten oxide supported on SBA- 15 mesoporous silica materials are reported. Additionally, the proton chemical shift of tungsten hydroxyl is identified for the first time. (C) 2004 Elsevier Inc. All rights reserved. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. RP Hu, JZ (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999,MS K8-98, Richland, WA 99352 USA. EM jianzhi.hu@pnl.gov RI Hu, Jian Zhi/F-7126-2012; Wang, Yong/C-2344-2013; Kwak, Ja Hun/J-4894-2014; OI Peden, Charles/0000-0001-6754-9928 NR 20 TC 26 Z9 26 U1 2 U2 9 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0926-2040 J9 SOLID STATE NUCL MAG JI Solid State Nucl. Magn. Reson. PD MAY PY 2005 VL 27 IS 3 BP 200 EP 205 DI 10.1016/j.ssnmr.2004.11.004 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Spectroscopy SC Chemistry; Physics; Spectroscopy GA 895OS UT WOS:000226873400007 PM 15681137 ER PT J AU Li, HY Sawaya, MR Tabita, FR Eisenberg, D AF Li, HY Sawaya, MR Tabita, FR Eisenberg, D TI Crystal structure of a RuBisCO-like protein from the green sulfur bacterium Chibrobium tepidum SO STRUCTURE LA English DT Article ID COMPLETE GENOME SEQUENCE; RIBULOSE 1,5-BISPHOSPHATE CARBOXYLASE/OXYGENASE; SPINACH RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE/OXYGENASE; CHLOROBIUM-TEPIDUM; ACTIVE-SITE; RHODOSPIRILLUM-RUBRUM; BISPHOSPHATE; RESOLUTION; OXYGENASE; COMPLEX AB Ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO) catalyzes the incorporation of atmospheric CO2 into ribulose 1,5-bisphosphate (RuBP). RuBisCOs are classified into four forms based on sequence similarity: forms I, II and III are bona fide RuBisCOs; form IV, also called the RuBisCO-like protein (RLP), lacks several of the substrate binding and catalytic residues and does not catalyze RuBP-dependent CO2 fixation in vitro. To contribute to understanding the function of RLPs, we determined the crystal structure of the RLP from Chlorobium tepidum. The overall structure of the RLP is similar to the structures of the three other forms of RuBisCO; however, the active site is distinct from those of bona fide RuBisCOs and suggests that the RLP is possibly capable of catalyzing enolization but not carboxylation. Bioinformatic analysis of the protein functional linkages suggests that this RLP coevolved with enzymes of the bacteriochlorophyll biosynthesis pathway and may be involved in processes related to photosynthesis. C1 Univ Calif Los Angeles, Inst Genom & Proteom, DOE, Howard Hughes Med Inst,Dept Chem & Biochem, Los Angeles, CA 90095 USA. Ohio State Univ, Dept Microbiol, Columbus, OH 43210 USA. Ohio State Univ, Plant Mol Biol Biotechnol Program, Columbus, OH 43210 USA. RP Eisenberg, D (reprint author), Univ Calif Los Angeles, Inst Genom & Proteom, DOE, Howard Hughes Med Inst,Dept Chem & Biochem, Box 951570, Los Angeles, CA 90095 USA. EM david@mbi.ucla.edu FU NIGMS NIH HHS [GM24497] NR 67 TC 28 Z9 30 U1 0 U2 2 PU CELL PRESS PI CAMBRIDGE PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA SN 0969-2126 J9 STRUCTURE JI Structure PD MAY PY 2005 VL 13 IS 5 BP 779 EP 789 DI 10.1016/j.str.2005.02.017 PG 11 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA 929GU UT WOS:000229330900013 PM 15893668 ER PT J AU Baer, DR AF Baer, DR TI Summary of ISO/TC 201 standard: XVIII, ISO 19318 : 2004 - surface chemical analysis - X-ray photoelectron spectroscopy - Reporting of methods used for charge control and charge correction SO SURFACE AND INTERFACE ANALYSIS LA English DT Article DE XPS; X-ray photoelectron spectroscopy; specimen charging; charge referencing; charge compensation; ISO; International Organization for Standardization ID XPS; SAMPLES AB International Standard ISO 19318 specifies the minimum amount of information describing the methods of charge control and charge correction in measurements of core-level binding energies for insulating specimens by x-ray photoelectron spectroscopy, which is to be reported with the analytical results. Information is also provided on methods that have been found useful for charge control and charge correction in the measurement of binding energies. Copyright © 2005 John Wiley & Sons, Ltd. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Baer, DR (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Box 999, Richland, WA 99352 USA. EM don.baer@pnl.gov RI Baer, Donald/J-6191-2013 OI Baer, Donald/0000-0003-0875-5961 NR 4 TC 3 Z9 3 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0142-2421 J9 SURF INTERFACE ANAL JI Surf. Interface Anal. PD MAY PY 2005 VL 37 IS 5 BP 524 EP 526 DI 10.1002/sia.2034 PG 3 WC Chemistry, Physical SC Chemistry GA 923KO UT WOS:000228909000012 ER PT J AU Shin, J Kalinin, SV Lee, HN Christen, HM Moore, RG Plummer, EW Baddorf, AP AF Shin, J Kalinin, SV Lee, HN Christen, HM Moore, RG Plummer, EW Baddorf, AP TI Surface stability of epitaxial SrRUO3 films SO SURFACE SCIENCE LA English DT Article DE reflection high-energy electron diffraction (RHEED); X-ray photoelectron spectroscopy; scanning tunneling microscopy; thermal desorption spectroscopy; surface structure, morphology, roughness, and topography; metallic surfaces ID THIN-FILMS; OXIDES AB The thermal stability of epitaxial SrRuO3 thin films grown by pulsed-laser deposition (PLD) has been studied by repetitive annealing by steps of 100 degrees C up to 800 degrees C under high vacuum and high oxygen pressure conditions. The evolution of chemical state, surface crystallographic structure, surface topography, and the nature of desorption products were studied using electron diffraction, spectroscopy, and scanning probe microscopy. Exposure to atmosphere leads to decomposition of the surface in vacuum at similar to 300 degrees C, despite good crystalline order before annealing. At the same time, films annealed to 700 degrees C in an oxygen/ozone mixture (10 mTorr) followed by vacuum annealing show no evidence of decomposition below 600 degrees C. These results reveal that the surface stability of epitaxial SrRuO3 is strongly affected by the presence of surface contaminants after exposure to air. Vibrational spectroscopy identifies these contaminants as adsorbed hydrocarbons. Results are compared with thermodynamic calculations, and implications for oxide electronic device technology are discussed. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Shin, J (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. EM jshin4@utk.edu RI Kalinin, Sergei/I-9096-2012; Christen, Hans/H-6551-2013; Lee, Ho Nyung/K-2820-2012; Baddorf, Arthur/I-1308-2016 OI Kalinin, Sergei/0000-0001-5354-6152; Christen, Hans/0000-0001-8187-7469; Lee, Ho Nyung/0000-0002-2180-3975; Baddorf, Arthur/0000-0001-7023-2382 NR 19 TC 34 Z9 34 U1 2 U2 42 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 2005 VL 581 IS 2-3 BP 118 EP 132 DI 10.1016/j.susc.2005.02.038 PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 920UD UT WOS:000228714700004 ER PT J AU LePoire, DJ AF LePoire, DJ TI Application of logistic analysis to the history of physics SO TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE LA English DT Article DE logistic; physics; history ID CYCLES AB Recently, two analyses have tried to put technological progress in a larger context. One interpretation hypothesizes that technological progress is likely to continue at increasingly higher rates of change. Another interpretation, which includes data from the beginning of the universe to the present, suggests that the universe is approaching a transition point in a logistic development of complexity. This logistic development is similar to the way ideas or products diffuse in a population, i.e., the rate of discovery in a field of knowledge is proportional to the amount discovered and the amount to be discovered. To test a part of this hypothesis, a leading indicator field (fundamental physics) was identified and the events in the history of this field were analyzed. Twelve subfields were identified and grouped into six stages. Each stage seemed to demonstrate a logistic-like development. By analyzing both the median time of development and the characteristic time of development of these stages, the overall development of this one field was found to suggest logistic development. These data seem to indicate that development in fundamental physics is slowing down, with at least one subfield beyond string physics yet to be developed. The data tend to support the hypothesis that a knowledge field can develop logistically. (c) 2003 Elsevier Inc. All rights reserved. C1 Argonne Natl Lab, Environm Assessment Div, Argonne, IL 60439 USA. RP LePoire, DJ (reprint author), Argonne Natl Lab, Environm Assessment Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM dlepoire@anl.gov NR 13 TC 4 Z9 4 U1 0 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0040-1625 J9 TECHNOL FORECAST SOC JI Technol. Forecast. Soc. Chang. PD MAY PY 2005 VL 72 IS 4 BP 471 EP 479 DI 10.1016/S0040-1625(03)00044-1 PG 9 WC Business; Planning & Development SC Business & Economics; Public Administration GA 918AT UT WOS:000228511400006 ER PT J AU Picard, RR AF Picard, RR TI Importance sampling for simulation of markovian physical processes SO TECHNOMETRICS LA English DT Article DE adaptive estimation; Markov chains; particle dispersion; rare event probabilities ID HIGHLY DEPENDABLE SYSTEMS; CHAIN MONTE-CARLO; EXPONENTIAL CONVERGENCE; MODELS; COMPUTATION; DISPERSION; EMISSIONS; TRANSPORT; EPISODE; THREAT AB Transient Markov chains are sometimes simulated to estimate rare event probabilities. For illustration, chains defined by an airborne particle dispersion model are used to estimate the probabilities that released particles reach various locations. Such estimated probabilities are needed for many purposes, including exposure calculations for affected populations and optimization of detector placement. By using experimental designs for simulation runs and embedding fitted regression models of output data in importance sampling transition kernels, convergence is improved by factors of tens to hundreds. C1 Los Alamos Natl Lab, Stat Grp, Los Alamos, NM 87545 USA. RP Picard, RR (reprint author), Los Alamos Natl Lab, Stat Grp, Los Alamos, NM 87545 USA. EM picard@lanl.gov NR 33 TC 2 Z9 2 U1 3 U2 3 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 USA SN 0040-1706 J9 TECHNOMETRICS JI Technometrics PD MAY PY 2005 VL 47 IS 2 BP 202 EP 211 DI 10.1198/004017004000000635 PG 10 WC Statistics & Probability SC Mathematics GA 922XF UT WOS:000228872500010 ER PT J AU Weese, RK AF Weese, RK TI Thermal conductivity of Tetryl by modulated differential scanning calorimetry SO THERMOCHIMICA ACTA LA English DT Article DE thermal conductivity; apparent heat capacity; isothermal; non-isothermal; MDSC AB An investigation of the use of modulated differential scanning calorimeter (MDSC) to measure thermal conductivity (K) of the explosive Tetryl using isothermal and non-isothermal methods. Issues surrounding the use of silicone oil as a heat transfer aid are discussed. Using these methods the calculated isothermal and non-isothermal properties of specific heat capacity were observed to be 0.844 and 0.863 J/(g K) and the calculated thermal conductivity values were found to be 0.165 and 0.186 W/K. Calibration experiments using polystyrene indicate that the non-isothermal method is more reproducible but has a larger offset (35%) from the true value. Our corrected values for Tetryl fall in the middle of the considerable range of values reported in the literature. (c) 2004 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94550 USA. RP Weese, RK (reprint author), Lawrence Livermore Natl Lab, Energet Mat Ctr, 7000 E Ave, Livermore, CA 94550 USA. EM weese2@llnl.gov NR 18 TC 6 Z9 7 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-6031 J9 THERMOCHIM ACTA JI Thermochim. Acta PD MAY 1 PY 2005 VL 429 IS 1 BP 119 EP 123 DI 10.1016/j.tca.2004.11.033 PG 5 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA 931JJ UT WOS:000229481300016 ER PT J AU Stair, PC AF Stair, PC TI Robert L. Burwell, Jr. (1912-2003): A short retrospective SO TOPICS IN CATALYSIS LA English DT Biographical-Item C1 Northwestern Univ, Dept Chem, Ctr Catalysis & Surface Sci, Evanston, IL 60208 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Stair, PC (reprint author), Northwestern Univ, Dept Chem, Ctr Catalysis & Surface Sci, 2145 Sheridan Rd, Evanston, IL 60208 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1022-5528 J9 TOP CATAL JI Top. Catal. PD MAY PY 2005 VL 34 IS 1-4 BP 2 EP 4 PG 3 WC Chemistry, Applied; Chemistry, Physical SC Chemistry GA 924UM UT WOS:000229006000002 ER PT J AU Marsh, AL Somorjai, GA AF Marsh, AL Somorjai, GA TI Structure, reactivity, and mobility of carbonaceous overlayers during olefin hydrogenation on platinum and rhodium single crystal surfaces SO TOPICS IN CATALYSIS LA English DT Article; Proceedings Paper CT International Symposium on Relationa between Homogeneous and Heterogeneous Catalysis CY JUL 20-25, 2003 CL NW Univ, Evanston, IL HO NW Univ DE catalysis; hydrogen; low index single crystal surfaces; platinum; rhodium; scanning tunneling microscopy; sum frequency generation; surface chemical reaction ID SUM-FREQUENCY GENERATION; SCANNING-TUNNELING-MICROSCOPY; ENERGY-ELECTRON-DIFFRACTION; ETHYLENE HYDROGENATION; STRUCTURE SENSITIVITY; HIGH-PRESSURE; VIBRATIONAL SPECTROSCOPY; CATALYTIC-REACTIONS; THERMAL-DESORPTION; BONDED ETHYLENE AB The hydrogenation of olefins (ethylene, propylene, and isobutene) and a cyclic olefin (cyclohexene) has been characterized on platinum and rhodium single crystal surfaces under conditions ranging from ultrahigh vacuum (UHV) to elevated pressures. A carbonaceous overlayer, formed by C-H bond activation, exists on the metal surface during catalytic hydrogenation, and the structure of this overlayer has been characterized using sum frequency generation (SFG) vibrational spectroscopy. The dehydrogenated carbonaceous species are unreactive even in the presence of excess hydrogen, while the intermediates that turnover are weakly bonded to the metal surface. The formation of this carbonaceous overlayer is accompanied by a restructuring of the metal surface. The overlayer is mobile on the surface during hydrogenation, as shown by high pressure scanning tunneling microscopy (HP-STM) results. Coadsorbed CO induces ordered surface structures, and as a consequence poisons the reaction. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Ernest O Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM somorjai@socrates.berkeley.edu NR 36 TC 13 Z9 13 U1 1 U2 6 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1022-5528 J9 TOP CATAL JI Top. Catal. PD MAY PY 2005 VL 34 IS 1-4 BP 121 EP 128 DI 10.1007/s11244-005-3805-5 PG 8 WC Chemistry, Applied; Chemistry, Physical SC Chemistry GA 924UM UT WOS:000229006000014 ER PT J AU Teeguarden, JG Deisinger, PJ Poet, TS English, JC Faber, WD Barton, HA Corley, RA Clewell, HJ AF Teeguarden, JG Deisinger, PJ Poet, TS English, JC Faber, WD Barton, HA Corley, RA Clewell, HJ TI Derivation of a human equivalent concentration for n-butanol using a physiologically based pharmacokinetic model for n-butyl acetate and metabolites n-butanol and n-butyric acid SO TOXICOLOGICAL SCIENCES LA English DT Article DE PBPK model; pharmacokinetics; acetates; extrapolation; risk assessment; metabolic series approach; n-butyl acetate; n-butanol; n-butyric acid ID RAT; VAPOR AB The metabolic series approach for risk assessment uses a dosimetry-based analysis to develop toxicity information for a group of metabolically linked compounds using pharmacokinetic (PK) data for each compound and toxicity data for the parent compound. The metabolic series approach for n-butyl acetate and its subsequent metabolites, n-butanol and n-butyric acid (the butyl series), was first demonstrated using a provisional physiologically based pharmacokinetic (PBPK) model for the butyl series. The objective of this work was to complete development of the PBPK model for the butyl series. Rats were administered test compounds by iv bolus dose, iv infusion, or by inhalation in a recirculating closed chamber. Hepatic, vascular, and extravascular metabolic constants for metabolism were estimated by fitting the model to the blood time course data from these experiments. The respiratory bioavailability of n-butyl acetate (100% of alveolar ventilation) and n-butanol (50% of alveolar ventilation) was estimated from closed chamber inhalation studies and measured ventilation rates. The resulting butyl series PBPK model successfully reproduces the blood time course of these compounds following iv administration and inhalation exposure to n-butyl acetate and n-butanol in rats and arterial blood n-butanol kinetics following inhalation exposure to n-butanol in humans. These validated inhalation route models can be used to support species and dose-route extrapolations required for risk assessment of butyl series family of compounds. Human equivalent concentrations of 169 ppm and 1066 ppm n-butanol corresponding to the rat n-butyl acetate NOAELs of 500 and 3000 ppm were derived using the models. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Eastman Kodak Co, Hlth & Environm Labs, Rochester, NY 14652 USA. Willem Faber Toxicol Consulting, Victor, NY 14564 USA. US EPA, NHEERL, Res Triangle Pk, NC 27709 USA. ENVIRON Hlth Sci Inst, Ruston, LA 71270 USA. RP Teeguarden, JG (reprint author), Pacific NW Natl Lab, POB 999,Mail Stop P7-56, Richland, WA 99352 USA. EM justin.teeguarden@pnl.gov OI Teeguarden, Justin/0000-0003-3817-4391 NR 20 TC 8 Z9 9 U1 0 U2 2 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 2005 VL 85 IS 1 BP 429 EP 446 DI 10.1093/toxsci/kfi103 PG 18 WC Toxicology SC Toxicology GA 916PO UT WOS:000228398000003 PM 15703268 ER PT J AU Hinderliter, PM Thrall, KD Corley, RA Bloemen, LJ Bogdanffy, MS AF Hinderliter, PM Thrall, KD Corley, RA Bloemen, LJ Bogdanffy, MS TI Validation of human physiologically based pharmacokinetic model for vinyl acetate against human nasal dosimetry data SO TOXICOLOGICAL SCIENCES LA English DT Article DE vinyl acetate; nasal dosimetry; PBPK modeling; human ID RISK-ASSESSMENT; METHYL-METHACRYLATE; INTRACELLULAR PH; RAT; METABOLISM; INHALATION; VAPORS; CLEARANCE; TOXICITY AB Vinyl acetate has been shown to induce nasal lesions in rodents in inhalation bioassays. A physiologically based pharmacokinetic (PBPK) model for vinyl acetate has been used in human risk assessment, but previous in vivo validation was conducted only in rats. Controlled human exposures to vinyl acetate were conducted to provide validation data for the application of the model in humans. Five volunteers were exposed to 1, 5, and 10 ppm C-13(1),C-13(2) vinyl acetate via inhalation. A probe inserted into the nasopharyngeal region sampled both C-13(1),C-13(2) vinyl acetate and the major metabolite C-13(1),C-13(2) acetaldehyde during rest and light exercise. Nasopharyngeal air concentrations were analyzed in real time by ion trap mass spectrometry (MS/MS). Experimental concentrations of both vinyl acetate and acetaldehyde were then compared to predicted concentrations calculated from the previously published human model. Model predictions of vinyl acetate nasal extraction compared favorably with measured values of vinyl acetate, as did predictions of nasopharyngeal acetaldehyde when compared to measured acetaldehyde. The results showed that the current PBPK model structure and parameterization are appropriate for vinyl acetate. These analyses were conducted from 1 to 10 ppm vinyl acetate, a range relevant to workplace exposure standards but which would not be expected to saturate vinyl acetate metabolism. Risk assessment based on this model further concluded that 24 h per day exposures up to 1 ppm do not present concern regarding cancer or non-cancer toxicity. Validation of the vinyl acetate human PBPK model provides support for these conclusions. C1 DuPont Co Inc, Haskell Lab Hlth & Environm Sci, Newark, DE 19714 USA. Pacific NW Lab, Div Biol Sci, Richland, WA 99352 USA. Dow Benelux NV, Epidemiol Hlth Serv, Terneuzen, Netherlands. RP Hinderliter, PM (reprint author), DuPont Co Inc, Haskell Lab Hlth & Environm Sci, POB 50, Newark, DE 19714 USA. EM paul.m.hinderliter@usa.dupont.com NR 20 TC 13 Z9 13 U1 0 U2 0 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 2005 VL 85 IS 1 BP 460 EP 467 DI 10.1093/toxsci/kfi091 PG 8 WC Toxicology SC Toxicology GA 916PO UT WOS:000228398000005 PM 15659566 ER PT J AU Corley, RA Bartels, MJ Carney, EW Weitz, KK Soelberg, JJ Gies, RA Thrall, KD AF Corley, RA Bartels, MJ Carney, EW Weitz, KK Soelberg, JJ Gies, RA Thrall, KD TI Development of a physiologically based pharmacokinetic model for ethylene glycol and its metabolite, glycolic acid, in rats and humans SO TOXICOLOGICAL SCIENCES LA English DT Article DE ethylene glycol; glycolic acid; PBPK modeling ID SPRAGUE-DAWLEY RATS; DIETHYLENE GLYCOL; PLASMA DISPOSITION; CHRONIC TOXICITY; HUMAN LIVER; F344 RATS; MICE; INHALATION; EXPOSURE; OXALATE AB An extensive database on the toxicity and modes of action of ethylene glycol (EG) has been developed over the past several decades. Although renal toxicity has long been recognized as a potential outcome, in recent years developmental toxicity, an effect observed only in rats and mice, has become the subject of extensive research and regulatory reviews to establish guidelines for human exposures. The developmental toxicity of EG has been attributed to the intermediate metabolite, glycolic acid (GA), which can become a major metabolite when EG is administered to rats and mice at high doses and dose rates. Therefore, a physiologically based pharmacokinetic (PBPK) model was developed to integrate the extensive mode of action and pharmacokinetic data on EG and GA for use in developmental risk assessments. The resulting PBPK model includes inhalation, oral, dermal, intravenous, and subcutaneous routes of administration. Metabolism of EG and GA were described in the liver with elimination via the kidneys. Metabolic rate constants and partition coefficients for EG and GA were estimated from in vitro studies. Other biochemical constants were optimized from appropriate in vivo pharmacokinetic studies. Several controlled rat and human metabolism studies were used to validate the resulting PBPK model. When internal dose surrogates were compared in rats and humans over a broad range of exposures, it was concluded that humans are unlikely to achieve blood levels of GA that have been associated with developmental toxicity in rats following occupational or environmental exposures. C1 Battelle Pacific NW Div, Richland, WA 99352 USA. Dow Chem Co USA, Midland, MI 48674 USA. RP Corley, RA (reprint author), Biol Monitoring & Modeling, POB 999,MSIN P7-59, Richland, WA 99352 USA. EM rick.corley@pnl.gov NR 68 TC 39 Z9 39 U1 3 U2 9 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 2005 VL 85 IS 1 BP 476 EP 490 DI 10.1093/toxsci/kfi119 PG 15 WC Toxicology SC Toxicology GA 916PO UT WOS:000228398000007 PM 15716482 ER PT J AU Corley, RA McMartin, KE AF Corley, RA McMartin, KE TI Incorporation of therapeutic interventions in physiologically based pharmacokinetic modeling of human clinical case reports of accidental or intentional overdosing with ethylene glycol SO TOXICOLOGICAL SCIENCES LA English DT Article DE ethylene glycol; glycolic acid; PBPK modeling; fomepizole; ethanol; hemodialysis ID LIVER ALCOHOL DEHYDROGENASE; F344 RATS; TOXICITY; ETHANOL; 4-METHYLPYRAZOLE; INHIBITION; FOMEPIZOLE; METABOLISM; DIAGNOSIS; PYRAZOLE AB Although occupational uses of the high production volume (HPV) chemical ethylene glycol (EG) have not been associated with adverse effects, there are case reports where humans have either intentionally or accidentally ingested large quantities of EG, primarily from antifreeze. The acute toxicity of EG can proceed through three stages, each associated with a different metabolite: central nervous system depression (ethylene glycol), cardiopulmonary effects associated with metabolic acidosis (glycolic acid), and ultimately renal toxicity (oxalic acid), depending on the total amounts consumed and the effectiveness of therapeutic interventions. A physiologically based pharmacokinetic (PBPK) model developed in a companion paper (Corley et al., 2005). Development of a physiologically based pharmacokinetic model for ethylene glycol and its metabolite, glycolic acid, in rats and humans. Toxicol. Sci., in press 2005) was refined in this study to include clinically relevant treatment regimens for EG poisoning such as hemodialysis or metabolic inhibition with either ethanol or fomepizole. Such modifications enabled the model to describe data from several human case reports, confirming the ability of the previous model to describe the pharmacokinetics of EG and its metabolite, glycolic acid, in humans across a broad range of doses and multiple exposure routes. By integrating the case report data sets with controlled studies in this PBPK model, it was demonstrated that fomepizole, if administered early enough in a clinical situation, can be more effective than ethanol or hemodialysis in preventing the metabolism of EG to more toxic metabolites. Hemodialysis remains an important option, however, if treatment is instituted after a significant amount of EG is metabolized or if renal toxicity has occurred. C1 Battelle Pacific NW Div, Richland, WA 99352 USA. Louisiana State Univ, Hlth Sci Ctr, Shreveport, LA 71105 USA. RP Corley, RA (reprint author), Biol Monitoring & Modeling, POB 999,MSIN P7-59, Richland, WA 99352 USA. EM rick.corley@pnl.gov NR 34 TC 11 Z9 12 U1 1 U2 3 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 2005 VL 85 IS 1 BP 491 EP 501 DI 10.1093/toxsci/kfi120 PG 11 WC Toxicology SC Toxicology GA 916PO UT WOS:000228398000008 PM 15716481 ER PT J AU Bora, CK Flater, EE Street, MD Redmond, JM Starr, MJ Carpick, RW Plesha, ME AF Bora, CK Flater, EE Street, MD Redmond, JM Starr, MJ Carpick, RW Plesha, ME TI Multiscale roughness and modeling of MEMS interfaces SO TRIBOLOGY LETTERS LA English DT Article DE multiscale; fractal; roughness; surface; summit; asperity; modeling; MEMS; AFM ID FRACTAL SURFACES; CONTACT AB Investigation of contact and friction at multiple length scales is necessary for the design of surfaces in sliding microelectromechanical system (MEMS). A method is developed to investigate the geometry of summits at different length scales. Analysis of density, height, and curvature of summits on atomic force microscopy (AFM) images of actual silicon MEMS surfaces shows that these properties have a power law relationship with the sampling size used to define a summit, and no well-defined value for any is found, even at the smallest experimentally accessible length scale. This behavior and its similarity to results for fractal Weierstrass-Mandelbrot (W-M) function approximations indicate that a multiscale model is required to properly describe these surfaces. A multiscale contact model is developed to describe the behavior of asperities at different discrete length scales using an elastic single asperity contact description. The contact behavior is shown to be independent of the scaling constant when asperity heights and radii are scaled correctly in the model. C1 Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Bora, CK (reprint author), Univ Wisconsin, Dept Engn Phys, 1500 Engn Dr, Madison, WI 53706 USA. EM bora@cae.wisc.edu NR 20 TC 62 Z9 65 U1 1 U2 20 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1023-8883 J9 TRIBOL LETT JI Tribol. Lett. PD MAY PY 2005 VL 19 IS 1 BP 37 EP 48 DI 10.1007/s11249-005-4263-8 PG 12 WC Engineering, Chemical; Engineering, Mechanical SC Engineering GA 927RP UT WOS:000229218500007 ER PT J AU Vaniman, D Broxton, D Chipera, S AF Vaniman, D Broxton, D Chipera, S TI Vadose zone clays and water content beneath wet and dry canyons of the Pajarito Plateau, New Mexico SO VADOSE ZONE JOURNAL LA English DT Article ID HALLOYSITE; MATRIX AB Clay mineralogy in the vadose zone at Los Alamos National Laboratory (LANL), situated on the Pajarito Plateau of northern New Mexico, differs significantly beneath wet and dry canyons. Drainage across LANL is generally from west to east and feeds into the Rio Grande along the eastern margin of the plateau. Canyons with head-waters in the Sierra de los Valles west of the plateau support more flow and are wetter than canyons with headwaters on the plateau. Los Alamos Canyon, one of the wetter canyons, has extensive clay alteration to depths >30 m in the subcanyon vadose zone. Mortandad Canyon, one of the drier canyons, has less clay alteration. Hydraulic property data for the Otowi Member of the Bandelier Tuff, one of the most widespread lithologies of the plateau, indicate that zones of high clay abundance have hydraulic transmissivities (K-sat) one to two orders of magnitude lower than less altered tuff (similar to 10(-4) vs. 10(-2) to 10(-3) cm/s). Occurrences of halloysite, and perhaps kaolinite, indicate zones where different the water/rock ratio is or has been high within the vadose zone. Gravimetric water content data collected at 110 degrees C from vadose zone rocks with low to moderate clay content provide water abundance data for matrix flow calculations. These data may be in error by up to similar to 5 to 16% because some of the water measured is actually held in clay interlayers rather than in pore spaces; such errors are minor but should be considered in the use of gravimetric moisture data. The use of electrical methods to explore for vadose wet zones is valid on the Pajarito Plateau as long as the results are treated broadly, with the understanding that some intervals of high conductivity are not entirely related to either movable water content or clay abundance. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Vaniman, D (reprint author), Los Alamos Natl Lab, MS D462, Los Alamos, NM 87545 USA. EM vaniman@lanl.gov NR 19 TC 2 Z9 2 U1 2 U2 4 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD MAY PY 2005 VL 4 IS 3 BP 453 EP 465 DI 10.2136/vzj2004.0068 PG 13 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 944DB UT WOS:000230404400001 ER PT J AU Nyhan, JW AF Nyhan, JW TI A seven-year water balance study of an evapotranspiration landfill cover varying in slope for semiarid regions SO VADOSE ZONE JOURNAL LA English DT Article ID HYDROLOGIC EVALUATION; HYDRAULIC-PROPERTIES; SOIL EVAPORATION; NEW-MEXICO; PERFORMANCE; DESIGNS; MODEL; BARRIERS; SYSTEM; LINERS AB The goal of radioactive and hazardous waste disposal in shallow landfills is to reduce risk to human health and to the environment by isolating contaminants until they no longer pose a hazard. To achieve this for a semiarid region, we studied a landfill cover containing a ( Koerner, 2002) of soil- only landfill covers performed in gravel layer, an evapotranspiration (ET) cover, in the field for 7 yr. We measured total water balance at 6-h intervals for this landfill cover design in four 1.0- by 10.0-m plots with downhill slopes of 5, 10, 15, and 25%. During the 7 yr of the field study, runoff accounted for 1.4 to 3.8% of the precipitation losses on these unvegetated landfill cover designs, whereas similar values for evaporation ranged from 88 to 95%. Evaporation usually increased with increases in slope in our field plots; for example, the ET Cover at slopes of 5 and 15% displayed 274 and 296 cm of evaporation, respectively. Interflow and seepage usually decreased with increasing slope; for example, as slope increased from 10 to 25%, interflow decreased from 18.4 to 8.8 cm. Seepage consisted of up to 1.7% of the precipitation on the ET cover, showing a maximum value of 5.3 cm on the ET cover with the slope covers of 5%. C1 Los Alamos Natl Lab, Ecol Grp, Los Alamos, NM 87545 USA. RP Nyhan, JW (reprint author), Los Alamos Natl Lab, Ecol Grp, Mail Stop M-877, Los Alamos, NM 87545 USA. EM jwn@lanl.gov NR 59 TC 22 Z9 22 U1 0 U2 11 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD MAY PY 2005 VL 4 IS 3 BP 466 EP 480 DI 10.2136/vzj2003.0159 PG 15 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 944DB UT WOS:000230404400002 ER PT J AU Hershberger, J Ajayi, OO Zhang, J Yoon, H Fenske, GR AF Hershberger, J Ajayi, OO Zhang, J Yoon, H Fenske, GR TI Evidence of scuffing initiation by adiabatic shear instability SO WEAR LA English DT Article DE scuffing; diffraction; adiabatic; instability; dislocation density ID X-RAY-DIFFRACTION; PROFILE ANALYSIS; GRAIN-SIZE; RUNNING-IN; DISLOCATIONS; STRAIN; STEEL; DEFORMATION; MECHANISMS; CRYSTALS AB A mechanism for the initiation of scuffing based on adiabatic shear instability was assessed experimentally through the measurement of dislocation densities by X-ray diffraction. Scuffing was predicted to occur when the rate of local thermal softening exceeded that of work hardening in the tribological contact. Since these rates were dependent on microstructure, the theory was tested by performing scuffing tests on SAE 4340 steel subjected to five different heat treatments. The scuffing resistances were consistent with the theory, and thermal events during the tests and the resulting microstructural morphologies were consistent with a locally adiabatic environment. The dislocation densities measured in samples from tests stopped before, during, and after scuffing were consistent with the theory. Use of the Advanced Photon Source (APS) at Argonne National Laboratory was supported by the U.S. Department of Energy under Contract W-31-109-ENG-38. (c) 2004 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Caterpillar Inc, Div 854, Mossville, IL 61552 USA. RP Hershberger, J (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jhersh@anl.gov NR 36 TC 34 Z9 36 U1 1 U2 6 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD MAY PY 2005 VL 258 IS 10 BP 1471 EP 1478 DI 10.1016/j.wear.2004.10.010 PG 8 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 911VT UT WOS:000228035100002 ER PT J AU Dahmen, U Johnson, E Penisson, JM Radetic, T Lancon, F AF Dahmen, U Johnson, E Penisson, JM Radetic, T Lancon, F TI TEM observations on the behavior of facet junctions in interfaces and inclusions SO ZEITSCHRIFT FUR METALLKUNDE LA English DT Article; Proceedings Paper CT EuroConference on Interfaces in Nanostructured Materials CY JUN 06-11, 2004 CL Kloster Irsee, GERMANY DE interfaces; inclusions; nanoscale; edge energy; electron microscopy ID GRAIN-BOUNDARIES; TWIN BOUNDARY; SHAPES; COPPER AB The increasing role of interfaces with decreasing scale is particularly important for small inclusions, grains or precipitates. In this work, we present a brief review of some of our recent TEM investigations of faceted singular interfaces and interface junctions in crystals. Direct observations by high-resolution electron microscopy allow us to relate the size, shape, and local interface structure to the behavior of nanoscale inclusions. The effect of facet junctions on equilibrium shapes of inclusions, on the structure of grain boundary grooves at surfaces and on grain-boundaries in anisotropic bicrystals are illustrated with examples from recent work by this group. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. Univ Copenhagen, Niels Bohr Inst, Nano Sci Ctr, DK-2100 Copenhagen, Denmark. Riso Natl Lab, Mat Res Dept, Roskilde, Denmark. CEA Grenoble, Dept Rech Fondamentale Mat Condensee, Grenoble, France. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, MS 72-150,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM Udahmen@LBL.gov RI Lancon, Frederic/B-2577-2009 OI Lancon, Frederic/0000-0002-6367-4462 NR 26 TC 0 Z9 0 U1 0 U2 3 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 2005 VL 96 IS 5 BP 413 EP 418 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA 937MP UT WOS:000229928700002 ER PT J AU Siriwardane, RV Poston, JA Fisher, EP AF Siriwardane, RV Poston, JA Fisher, EP TI Interaction of hydrogen sulfide with Zr0.92Y0.08O2-delta/40% Ni cermet SO APPLIED SURFACE SCIENCE LA English DT Article DE high temperature cermets; gas separation membranes; ceramic membranes; surface characterization of membranes; interaction of H2S with cermets; fuel cell electrodes; cermets ID NICKEL; CATALYSTS; CHEMISORPTION; BEHAVIOR; H2S AB The interaction of hydrogen sulfide with a cermet composed of zirconium oxide and yttrium oxide doped with metallic nickel (Ni) in the stoichiometric form Zr0.92Y0.08O2-delta/40 vol% Ni and a pure nickel metal was studied at 500 and 650 degrees C utilizing high temperature X-ray photoelectron spectroscopy and high-temperature scanning electron microscopy. The hydrogen sulfide (H2S) did not appear to interact with the cermet at 500 degrees C with H,S exposures of 6 x 10(-5) Torr for I h, but interaction of H2S with the cermet was observed at 650 degrees C at similar H2S exposures. The amount and the rate of reaction of H2S were significantly lower with the cermet than with the pure nickel metal at 650 degrees C with similar HS exposures. The dispersion of nickel in the zirconium and yttrium oxide matrix decreased the reaction of HS with nickel in the cermet. (c) 2004 Elsevier B.V. All rights reserved. C1 US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA. RP Siriwardane, RV (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd,POB 880, Morgantown, WV 26507 USA. EM rsiriw@netl.doe.gov NR 13 TC 5 Z9 5 U1 2 U2 3 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 30 PY 2005 VL 243 IS 1-4 BP 40 EP 54 DI 10.1016/j.apsusc.2004.07.070 PG 15 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 909IK UT WOS:000227853400008 ER PT J AU Subramanian, K Mickalonis, J AF Subramanian, K Mickalonis, J TI Anodic polarization behavior of low-carbon steel in concentrated sodium hydroxide and sodium nitrate solutions SO ELECTROCHIMICA ACTA LA English DT Article DE caustic stress corrosion cracking; anodic polarization; high-level waste tank corrosion; nitrate stress corrosion cracking; low-carbon steel ID STRESS-CORROSION CRACKING; MILD-STEEL; ELECTRODE; SYSTEM AB High-level radioactive wastes. primarily consisting of concentrated sodium hydroxide (NaOH) and sodium nitrate (NaNO3) solutions, are stored in large underground storage tanks made of low-carbon steel. The anodic polarization behavior of low-carbon steel in concentrated solutions of 10 M NaOH and various concentrations of NaNO3 (0.01-2.0 M) was determined in order to predict the caustic stress corrosion cracking (CSCC) susceptibility of the tanks. The active-passive transition peak exhibited during anodic polarization of low-carbon steel in 10 M NaOH. typically associated with CSCC, at -0.25 and -0.75 V-SCE, is Still present at the lower and higher concentrations of nitrate. However, there is a mid-ran-e of nitrate concentrations (0.5-1 M) within which the peak is suppressed by the strongly oxidizing nitrate in the presence of oxygen, a cathodic depolarizer. Temperature also affects the magnitude of this mid-range of nitrate concentrations where CSCC is seen to be electrochemically prevented. The data suggest that the oxygen solubility at the relatively low temperatures tested (< 95 degrees C) controls the preference of the cathodic reaction, i.e. oxygen reduction versus nitrate reduction. When oxygen reduction is the preferred cathodic reaction, E-corr, is driven more noble than the active-passive transition peak. (c) 2004 Elsevier Ltd. All rights reserved. C1 Westinghouse Savannah River Co, Savannah River Natl Lab, Aiken, SC 29808 USA. RP Subramanian, K (reprint author), Westinghouse Savannah River Co, Savannah River Natl Lab, Savannah River Site,773-A,D1138, Aiken, SC 29808 USA. EM karthik.subramanian@srs.gov NR 17 TC 3 Z9 3 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0013-4686 J9 ELECTROCHIM ACTA JI Electrochim. Acta PD APR 30 PY 2005 VL 50 IS 13 BP 2685 EP 2691 DI 10.1016/j.electacta.2004.11.013 PG 7 WC Electrochemistry SC Electrochemistry GA 920PQ UT WOS:000228703000016 ER PT J AU Cummer, SA Zhai, YH Hu, WY Smith, DM Lopez, LI Stanley, MA AF Cummer, SA Zhai, YH Hu, WY Smith, DM Lopez, LI Stanley, MA TI Measurements and implications of the relationship between lightning and terrestrial gamma ray flashes SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID LOWER IONOSPHERE; SPRITES; BREAKDOWN; THUNDERSTORM; PROPAGATION; IONIZATION; CURRENTS AB We report observations and analysis of 30 kHz radio emissions (sferics) from lightning discharges associated with 26 terrestrial gamma ray flashes (TGFs) recorded by the RHESSI satellite over the Caribbean and Americas, between 1500 and 4000 km away from the magnetic field sensors located at Duke University. Thirteen of the TGFs are found to occur within - 3/+ 1 ms of lightning discharges of positive polarity from the direction of the RHESSI subsatellite point, strongly indicating that the TGFs are linked to these discharges. The event timing and sferic direction finding reveals that the discharges occur within a &SIM; 300 km radius circle around the RHESSI subsatellite point. Although the positive polarity of all 13 discharges is consistent with runaway breakdown, the lightning charge moment changes are approximately two orders of magnitude smaller than present high altitude runaway breakdown theory predicts. Implications of these measurements are discussed. C1 Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA. Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Space & Remote Sensing Sci Grp, Los Alamos, NM USA. RP Cummer, SA (reprint author), Duke Univ, Dept Elect & Comp Engn, Box 90291, Durham, NC 27708 USA. EM cummer@ee.duke.edu RI Cummer, Steven/A-6118-2008 OI Cummer, Steven/0000-0002-0002-0613 NR 19 TC 112 Z9 114 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD APR 30 PY 2005 VL 32 IS 8 AR L08811 DI 10.1029/2005GL022778 PG 5 WC Geosciences, Multidisciplinary SC Geology GA 923GC UT WOS:000228896900007 ER PT J AU Chen, F Mohideen, U Milonni, PW AF Chen, F Mohideen, U Milonni, PW TI Limits on non-Newtonian gravity and hypothetical forces from measurements of the Casimir force SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT 6th Alexander Friedmann International Seminar on Gravitation and Cosmology CY JUN 28-JUL 03, 2004 CL Corsica, FRANCE SP Univ Provence, Ctr Theoret Phys, Inst Etudes Sci Cargese DE non-Newtonian gravity; Casimir force; Yukawa-type interaction ID INVERSE-SQUARE LAW; EXTRA DIMENSIONS; CONSTRAINTS; PHYSICS AB Modern unification theories that seek to unify gravity with the other fundamental forces predict a host of new particles outside the standard model. Many also invoke extra dimensions. Both of these effects lead to deviations from Newtonian gravity. For sub micron distance between two bodies, the Casimir force far exceeds the gravitational force. Thus both understanding and using the Casimir force is very important for checking the relevance of these unification theories. In particular, measurements of the Casimir force has allowed one to set some of the strongest constraints for corresponding distance regions. This paper summarizes the techniques used to measure the Casimir force and some of the limits that follow from them. C1 Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chen, F (reprint author), Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. NR 34 TC 4 Z9 4 U1 0 U2 4 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD APR 30 PY 2005 VL 20 IS 11 BP 2222 EP 2231 DI 10.1142/S0217751X05024420 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 932JL UT WOS:000229549900003 ER PT J AU Kim, KH Harrison, N Amitsuka, H Jorge, GA Jaime, M Mydosh, JA AF Kim, KH Harrison, N Amitsuka, H Jorge, GA Jaime, M Mydosh, JA TI Link between magnetic field-induced quantum criticality and phase formation in U(Ru1-xRhx)(2)Si-2 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE quantum critical point; U(Ru, Rh)(2)Si-2; phase formation AB The magnetization and resistivity studies in magnetic fields up to 45 T were used to establish magnetic field versus temperature phase diagram and quantum criticality in U(Ru1-xRhx)(2)Si-2. For x = 4%, the hidden order is completely destroyed, stabilizing a single field-induced phase II. A correlation between the field dependence of this phase and that of the quantum critical point, combined with the suppression of the T-2 coefficient of the resistivity within it, shows that the field-tuned quantum criticality is intimately related to the phase formation. (c) 2005 Elsevier B.V. All rights reserved. C1 Seoul Natl Univ, CSCMR, Seoul 151747, South Korea. Seoul Natl Univ, Sch Med, Seoul 151747, South Korea. Los Alamos Natl Lab, NHMFL, Los Alamos, NM 87545 USA. Hokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido 0600810, Japan. Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands. Max Planck Inst Chem Phys Stoffe, D-01187 Dresden, Germany. RP Seoul Natl Univ, CSCMR, Seoul 151747, South Korea. EM khkim@phya.snu.ac.kr RI Amitsuka, Hiroshi/K-8539-2012; Jaime, Marcelo/F-3791-2015 OI Jaime, Marcelo/0000-0001-5360-5220 NR 8 TC 1 Z9 1 U1 0 U2 2 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 APR 30 PY 2005 VL 359 BP 32 EP 34 DI 10.1016/j.physb.2004.12.047 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400009 ER PT J AU Bauer, ED Moreno, NO Mixson, DJ Sarrao, JL Thompson, JD Hundley, MF Movshovich, R Pagliuso, PG AF Bauer, ED Moreno, NO Mixson, DJ Sarrao, JL Thompson, JD Hundley, MF Movshovich, R Pagliuso, PG TI Rapid suppression of superconductivity in CeCoIn5-xSnx SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE heavy-fermion; superconductivity ID PRESSURE AB Measurements of specific heat C(T) and electrical resistivity p(T) of the Sn-substituted heavy fermion superconductor CeCoIn5 are reported. Superconductivity in CeColn(5-x)Sn(x) is rapidly suppressed at a rate dT(c)/dx = -0.6 K/at% Sn. Both the non-Fermi liquid T-linear behavior of p(T) and the logarithmic divergence of C/T at low-T in CeCoIn5-xSnx suggest proximity to a quantum critical point. Substitution of (larger) Sn for (smaller) In results in an increase in the f-electron/conduction-electron hybridization rather than the expected negative chemical pressure effect and may, at least in part, be the reason for the rapid destruction of superconductivity in CeCoIn5. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. RP Bauer, ED (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM edbauer@lanl.gov RI Bauer, Eric/D-7212-2011; Pagliuso, Pascoal/C-9169-2012; Moreno, Nelson/H-1708-2012 OI Moreno, Nelson/0000-0002-1672-4340 NR 7 TC 14 Z9 14 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 35 EP 37 DI 10.1016/j.physb.2004.12.048 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400010 ER PT J AU Bianchi, A Movshovich, R Vekhter, I Pagliuso, PG Sarrao, JL AF Bianchi, A Movshovich, R Vekhter, I Pagliuso, PG Sarrao, JL TI Avoided antiferromagnetic order and QCP in CeCoIn5 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE quantum critical point; superconductivity; antiferromagnetism ID ELECTRON AB We measured the specific heat and resistivity of heavy fermion CeCoIn5 between the superconducting critical field H-c2, = 4.95 and 9T, with the field in the [001] direction, and at temperatures down to 50mK. These results show that this compound has a quantum critical point (QCP) with the magnetic field as the tuning parameter. For a field of 5 T just above H-c2 the temperature dependence of both specific heat C-p(T) and resistivity rho(T) show non-Fermi liquid (NFL) behavior down to the lowest temperatures with C-p(T) alpha - log(T) and rho(T) - rho(T = 0) alpha T. For fields above 8 T the data exhibit a crossover from a NFL to a Fermi liquid behavior. Specific heat and resistivity data show behavior predicted by spin-fluctuation theory, suggesting that the NFL behavior is due to incipient antifierromagnetism (AFM) in CeCoIn5 with the quantum critical point in the vicinity of H-c2. For fields below H-c2 the AFM phase separated by a QCP from the paramagnetic ground state is not observed, as the system becomes first superconducting. (c) 2005 Elsevier B.V. All rights reserved. C1 Forschungszentrum Rossendorf EV, D-01314 Dresden, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. UNICAMP, Inst Fis Gleb Wathagin, BR-13083970 Campinas, SP, Brazil. RP Bianchi, A (reprint author), Forschungszentrum Rossendorf EV, Postfach 510119, D-01314 Dresden, Germany. EM a.blanchi@fz-rossendorf.de RI Pagliuso, Pascoal/C-9169-2012; Inst. of Physics, Gleb Wataghin/A-9780-2017; Vekhter, Ilya/M-1780-2013; Bianchi, Andrea/E-9779-2010 OI Bianchi, Andrea/0000-0001-9340-6971 NR 5 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 APR 30 PY 2005 VL 359 BP 74 EP 76 DI 10.1016/j.physb.2004.12.061 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400023 ER PT J AU Koyama, T Nakamura, M Mito, T Wada, S Sarrao, JL AF Koyama, T Nakamura, M Mito, T Wada, S Sarrao, JL TI Investigation of pressure-induced magnetic ordering in YbInCu4 probed microscopically by Cu-63 NQR SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE YbInCu4; pressure effect; magnetic transition; NQR ID TRANSITION AB The application of pressure for YbInCu4 stabilizes the localized character of f electrons and, after the complete suppression of the first-order valence transition near 2.4 GPa, leads to a magnetic (most probably ferromagnetic) ordering above 2.45 GPa and below T-M = 2.4 K. In order to elucidate the mechanism of the pressure-induced magnetic ordering in YbInCu4, we have performed an NQR experiment under pressure up to 2.5 GPa. Cu-63 spin-lattice relaxation rate in the pressure-stabilized state has a temperature-independent behavior followed by a divergent increase just above T-M. Thus, for YbInCu4 at high pressure, we conclude that the localized Yb spins transform into the magnetically ordered ground state without taking any intermediate heavy-Fermion state above T-M. (c) 2005 Elsevier B.V. All rights reserved. C1 Kobe Univ, Grad Sch Sci & Technol, Dept Mat Sci, Nada, Kobe 6578501, Japan. Kobe Univ, Fac Sci, Dept Phys, Nada, Kobe 6578501, Japan. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Koyama, T (reprint author), Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan. EM t-koyama@sci.u-hyogo.ac.jp 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 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 232 EP 234 DI 10.1016/j.physb.2005.01.046 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400074 ER PT J AU Hancock, JN McKnew, T Schlesinger, Z Sarrao, JL Fisk, Z AF Hancock, JN McKnew, T Schlesinger, Z Sarrao, JL Fisk, Z TI Optically probing the kondo resonance in YbIn1-xAgxCu4 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE mixed valence; heavy fermion; valence transition; YbTn(1-x)Ag(x)Cu(4); Kondo ID 1ST-ORDER VALENCE TRANSITION; PHASE-TRANSITION; YBINCU4 AB We report the infrared charge dynamics of YbIn1-xAgxCu4 in a series of x- and T-dependent reflectivity measurements. Within the low-temperature coherent phase, characteristics of a low energy (0.25 eV) excitation appear to be controlled by the same Kondo scale, T-K, which is relevant to the magnetic response (Phys. Rev. B 56 (1997) 7993). We show that the observed TK dependence of the frequency and strength of this excitation is consistent with an interpretation in terms of a coherent-to-incoherent quasiparticle transition between the correlation-induced bands of the periodic Anderson model (Phys. Rev. Lett. 92 (2004) 186405). Additionally, we consider an interpretation of x-dependence in the higher frequency optical response in terms of a rigid band structure picture where the filling is depleted by Ag doping, augmented by a Kondo resonance which tracks the x-dependent Fermi level. In addition to the properties of the low-temperature phase, our results also encompass the anomalous temperature dependent behavior in the vicinity of the electronic phase transition at low doping (x < 0.3). (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. RP Sarrao, JL (reprint author), Los Alamos Natl Lab, Mail Stop K764, Los Alamos, NM 87545 USA. EM sarrao@lanl.gov RI Hancock, Jason/F-4694-2010 NR 8 TC 1 Z9 1 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 APR 30 PY 2005 VL 359 BP 239 EP 241 DI 10.1016/j.physb.2005.01.048 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400076 ER PT J AU Israel, C Bittar, EM Aguero, OE Urbano, RR Rettori, C Torriani, I Pagliuso, PG Moreno, NO Thompson, JD Hundley, MF Sarrao, JL Borges, HA AF Israel, C Bittar, EM Aguero, OE Urbano, RR Rettori, C Torriani, I Pagliuso, PG Moreno, NO Thompson, JD Hundley, MF Sarrao, JL Borges, HA TI Crystal structure and low-temperature physical properties of R3M4Sn13 (R = Ce, La; M = Ir, Co) intermetallics SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE synthesis of intermetallies; heavy fermion; magnetism ID RARE-EARTH; STANNIDES AB We have synthesized single crystalline samples of R3M4Sn13 (R = Ce, La; M = Ir, Co) using a Sn-flux method. Measurements of magnetic susceptibility and heat capacity indicate heavy-fermion behavior for the Ce-based compounds. The crystal structure of these intermetallic compounds has been determined by Rietveld refinement from X-ray powder diffraction data. They crystallize in a Yb3M4Sn13 type structure (Pm-3n), which has 40 atoms per unit cell. The low-temperature physical properties of these intermetallic compounds are reported. (c) 2005 Elsevier B.V. All rights reserved. C1 UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, Brazil. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. PUC, Dept Fis, BR-22452907 Rio De Janeiro, Brazil. RP Pagliuso, PG (reprint author), UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, Brazil. EM pagliuso@if.unicamp.br RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Urbano, Ricardo/F-5017-2012; Moreno, Nelson/H-1708-2012; Torriani, Iris/E-5686-2010; Bittar, Eduardo/B-6266-2008; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; Moreno, Nelson/0000-0002-1672-4340; Bittar, Eduardo/0000-0002-2762-1312; NR 5 TC 27 Z9 27 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 251 EP 253 DI 10.1016/j.physb.2005.01.053 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400080 ER PT J AU Thompson, JD Balatsky, AV Nicklas, M Pagliuso, PG Sarrao, JL Sidorov, VA AF Thompson, JD Balatsky, AV Nicklas, M Pagliuso, PG Sarrao, JL Sidorov, VA TI Hidden order in CeMIn5 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE CeMIn5; heavy-fermion superconductivity; quantum critical point; hidden order ID SUPERCONDUCTIVITY; CERHIN5 AB Experiments suggest that some form of hidden order, possibly related to field-induced transitions, may be important for superconductivity in CeIrn(5) at atmospheric pressure and in the very high-pressure phase of CeRhIn5. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany. Univ Estadual Campinas, DEQ IFGW, BR-13083970 Campinas, SP, Brazil. Inst High Pressure Phys, Troitsk 142190, Russia. RP Thompson, JD (reprint author), Los Alamos Natl Lab, MS K76, Los Alamos, NM 87545 USA. EM jdt@lanl.gov RI Pagliuso, Pascoal/C-9169-2012; Nicklas, Michael/B-6344-2008; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Nicklas, Michael/0000-0001-6272-2162; NR 15 TC 0 Z9 0 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 APR 30 PY 2005 VL 359 BP 392 EP 394 DI 10.1016/j.physb.2005.01.073 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400119 ER PT J AU Ramos, SM Fontes, MB Alvarenga, AD Baggio-Saitovitch, E Pagliuso, PG Bauer, ED Thompson, JD Sarrao, JL Continentino, MA AF Ramos, SM Fontes, MB Alvarenga, AD Baggio-Saitovitch, E Pagliuso, PG Bauer, ED Thompson, JD Sarrao, JL Continentino, MA TI Studies of electrical resistivity under pressure on superconducting Sn-doped CeCoIn5 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE heavy fermion superconductivity; quantum critical point; phase diagrams AB Experiments of electrical resistivity as a function of hydrostatic pressure for single crystals of Sn-doped CeCoIn5 are reported. Due to the subtle Sn-cloping, T, is strongly suppressed from T-c = 2.3 K of undoped CeCoIn5 to T-c similar to 0.7 K for the reported concentration (x similar to 0.12). As for pure CeCoIn5, superconductivity (SC) seems to evolve out of a non-Fermi liquid (NFL) normal state just above Tc. A temperature-pressure phase diagram is constructed from our results and compared with the properties of pure CeCoIn5 under pressure. Effects of chemical pressure and/or hybridization tuning associated with Sn-doping are discussed. (c) 2005 Elsevier B.V. All rights reserved. C1 CBPF, Rio De Janeiro, Brazil. UNICAMP, IFGW, BR-13083970 Campinas, SP, Brazil. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. UFF, Inst Fis, BR-2421340 Niteroi, RJ, Brazil. RP Pagliuso, PG (reprint author), CBPF, Rio De Janeiro, Brazil. EM pagliuso@if.unicamp.br RI Bauer, Eric/D-7212-2011; Pagliuso, Pascoal/C-9169-2012; Continentino, Mucio/B-7271-2013; Alvarenga, Ana Paula/M-9790-2014; Saitovitch, Elisa/A-6769-2015; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Continentino, Mucio/0000-0003-0167-8529; NR 4 TC 10 Z9 10 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 APR 30 PY 2005 VL 359 BP 398 EP 400 DI 10.1016/j.physb.2005.01.076 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400121 ER PT J AU Daniel, M Han, SW Booth, CH Cornelius, AL Bauer, ED Sarrao, JL AF Daniel, M Han, SW Booth, CH Cornelius, AL Bauer, ED Sarrao, JL TI Local structure around sn in CeCoIn5-xSnx SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE heavy-fermion compounds; X-ray absorption spectroscopy AB The local structure around Sri dopants in CeCoIn5-xSnx has been probed by extended X-ray absorption fine structure (EXAFS) technique. Our fit results for both x = 0.12 and x = 0.18 clearly indicate the dopant Sri atoms predominantly occupying the planar In(1) site. These results are consistent with the quasi-two-dimensional electronic properties of CeCoIn5 and will be discussed in relation to the observed bulk properties. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Chem Sci Div, Berkeley, CA 94720 USA. Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. Chonbuk Natl Univ, Jeonju 561756, South Korea. Los Alamos Natl Lab, Mat Sci Div, Los Alamos, NM 87501 USA. RP Daniel, M (reprint author), Univ Calif Berkeley, Chem Sci Div, MS 70A-1150,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM dmillion@lbl.gov RI Booth, Corwin/A-7877-2008; Cornelius, Andrew/A-9837-2008; Bauer, Eric/D-7212-2011 NR 9 TC 1 Z9 1 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 APR 30 PY 2005 VL 359 BP 401 EP 403 DI 10.1016/j.physb.2005.01.077 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400122 ER PT J AU Kumar, RS Kohlmann, H Light, BE Cornelius, AL Raghavan, V Darling, TW Sarrao, JL AF Kumar, RS Kohlmann, H Light, BE Cornelius, AL Raghavan, V Darling, TW Sarrao, JL TI The crystal structure of CeRhIn5 under pressure SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE intermetallics; heavy fermions; high pressure; X-ray diffraction ID SUPERCONDUCTIVITY; CEIRIN5 AB High-pressure X-ray (synchrotron) powder diffraction experiments have shown that the quasi-two-dimensional heavy fermion antiferromagnet CeRhIn5 retains its tetragonal HoCoGa5-tYPe structure up to 13GPa both at room (T = 295 K) and low (T = 10 K) temperature. Refined structural parameters reveal unusual behavior at pressures around 4-5 GPa. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Nevada, Dept Phys, High Pressure Sci & Engn Ctr, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Kohlmann, H (reprint author), Univ Nevada, Dept Phys, High Pressure Sci & Engn Ctr, Las Vegas, NV 89154 USA. EM ravhi@physics.unlv.edu RI Cornelius, Andrew/A-9837-2008; Kohlmann, Holger/C-6244-2009; OI Kumar, Ravhi/0000-0002-1967-1619 NR 7 TC 0 Z9 0 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 407 EP 409 DI 10.1016/j.physb.2005.01.081 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400124 ER PT J AU Movshovich, R Bianchi, A Capan, C Pagliuso, PG Sarrao, JL AF Movshovich, R Bianchi, A Capan, C Pagliuso, PG Sarrao, JL TI Possible Fulde-Ferrell-Larkin-Ovchinnikov inhomogeneous superconducting state in CeCoIn5 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE inhomogeneous superconductivity; heavy fermion; Fulde-Ferrell; Larkin-Ovchinnikov ID TYPE-2 SUPERCONDUCTORS; THERMAL-CONDUCTIVITY; PAULI PARAMAGNETISM; MAGNETIC-PROPERTIES; HEAVY-FERMION; UPD2AL3; FIELD AB We report specific heat and thermal conductivity measurements of the heavy fermion superconductor CeCoIn5 in the vicinity of the superconducting critical field H-c2, with magnetic field in the plane of this quasi-2D compound and at temperatures down to 50 mK. The superconducting phase transition changes from second to first order for field above 10T, as evident from a sharp peak in specific heat and a jump in thermal conductivity, indicating the importance of the Pauli limiting effect in CeCoIn5. In the same range of magnetic field, we observe a second specific beat anomaly within the superconducting state. We interpret this anomaly as a signature of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) inhomogeneous superconducting state. In addition, the thermal conductivity data as a function of field display a kink at a field H-k below the superconducting critical field, which closely coincides with the low-temperature anomaly in specific heat, tentatively identified with the appearance of the FFLO superconducting state. Our results indicate that the thermal conductivity is enhanced within the FFLO state, and call for further theoretical investigations of the real-space structure of the order parameter (and in particular, the structure of vortices) and of the thermal transport within the inhomogeneous FFLO state. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Forschungszentrum, Hochfeldlabor Dresden, D-01314 Dresden, Germany. UNICAMP, Inst Fis Gleb Wathagin, BR-13083970 Campinas, SP, Brazil. RP Movshovich, R (reprint author), Los Alamos Natl Lab, MS K764, Los Alamos, NM 87545 USA. EM roman@lanl.gov RI Pagliuso, Pascoal/C-9169-2012; Bianchi, Andrea/E-9779-2010; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Bianchi, Andrea/0000-0001-9340-6971; NR 37 TC 5 Z9 5 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 APR 30 PY 2005 VL 359 BP 416 EP 423 DI 10.1016/j.physb.2005.01.084 PG 8 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400127 ER PT J AU Lang, M Strack, C Akinci, C Wolf, B Schlueter, JA Wosnitza, J Schweitzer, D AF Lang, M Strack, C Akinci, C Wolf, B Schlueter, JA Wosnitza, J Schweitzer, D TI Pressure studies on a low-resistance variant of the quasi-2D organic superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE organic superconductors; resistivity measurements; pressure studies AB Measurements of the interlayer resistivity, rho perpendicular to (T), under hydrostatic pressure have been performed on a low (LR)-and high (HR)-resistance variant of the title organic superconductor. While the HR sample, synthesized according to the standard procedure, shows a semimetallic-like rho(T) behavior at high temperatures followed by the pronounced maximum around 90 K, the LR crystal, which is the result of a somewhat modified synthesis route, remains metallic for T <= 300K. Common to both variants is, however, an almost abrupt change in rho(T) around T* = 40K, consistent with a density-wave-type instability, which below T-c approximate to 12 K coexists with superconductivity, and a rho proportional to AT(2) dependence for T-c <= T <= T-0. While T* and T. are sample independent, the values for A and T-0 were found to differ markedly between both variants, inconsistent with the T-2 dependence originating from coherent Fermi-liquid excitations. (c) 2005 Elsevier B.V. All rights reserved. C1 JW Geothe Univ, Phys Inst, Frankfurt, Germany. Argonne NL, Mat Sci Div, Argonne, IL USA. TU Dresden, Inst Festkorperphys, Dresden, Germany. Univ Stuttgart, Phys Inst 3, Stuttgart, Germany. RP Lang, M (reprint author), JW Geothe Univ, Phys Inst, FOR 412, Frankfurt, Germany. EM michael.lang@physik.uni-frankfurt.de NR 6 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 APR 30 PY 2005 VL 359 BP 427 EP 429 DI 10.1016/j.physb.2005.01.086 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400129 ER PT J AU Jaiswal-Nagar, D Thakur, AD Eskildsen, MR Canfield, PC Yusuf, SM Ramakrishnan, S Grover, AK AF Jaiswal-Nagar, D Thakur, AD Eskildsen, MR Canfield, PC Yusuf, SM Ramakrishnan, S Grover, AK TI dHvA oscillations, upper critical field and the peak effect studies in a single crystal of LuNi2B2C SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE dHvA oscillations; upper critical field (H-c2); peak effect; quadrupolar moment; quaternary borocarbide AB The dHvA oscillations in crystals of LuNi2B2C are known to persist deep inside the vortex state, across the region of the peak effect located at the edge of the irreversibility field normal phase boundary. This makes the identification of H-c2(T) ambiguous in magnetization hysteresis loops at temperatures at which the dHvA signal is prominent. One can overcome this difficulty if Hc2(T) value is ascertained from the measurement of isothermal quadrupole moment (Q) vs. field values using a vibrating sample magnetometer. In these crystals, one can witness dHvA oscillations up to about 8 K and we show that Q(T) data in LuNi2B2C can be used to construct the vortex phase diagram over the entire (H, T) range. (c) 2005 Elsevier B.V. All rights reserved. C1 Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Bombay 400005, Maharashtra, India. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Iowa State Univ, Ames Lab, Ames, IA USA. Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India. RP Jaiswal-Nagar, D (reprint author), Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Homi Bhabha Rd, Bombay 400005, Maharashtra, India. EM shikha@tifr.res.in; canfield@ameslab.gov RI Thakur, Ajay/D-7924-2011; Eskildsen, Morten/E-7779-2011; Canfield, Paul/H-2698-2014 NR 5 TC 7 Z9 7 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 APR 30 PY 2005 VL 359 BP 476 EP 478 DI 10.1016/j.phusb.2005.01.104 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400145 ER PT J AU Oeschler, N Fisher, RA Phillips, NE Gordon, JE Foo, ML Cava, RJ AF Oeschler, N Fisher, RA Phillips, NE Gordon, JE Foo, ML Cava, RJ TI Heat capacity of Na0.3CoO2 center dot 1.3H(2)O SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE heat capacity; superconductivity; two gaps; line nodes ID SUPERCONDUCTIVITY AB The superconducting-state heat capacity of Na0.3CoO2 center dot 1.3H(2)O shows the presence of two distinctly different energy gaps and line nodes. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Amherst Coll, Dept Phys, Amherst, MA 01002 USA. Princeton Univ, Dept Chem, Princeton, NJ 08544 USA. RP Phillips, NE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM nephill@cchem.berkeley.edu RI Foo, Maw Lin/H-9273-2012 NR 17 TC 8 Z9 8 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 APR 30 PY 2005 VL 359 BP 479 EP 481 DI 10.1016/j.physb.2005.01.106 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400146 ER PT J AU Maier, TA AF Maier, TA TI On the nature of pairing in the two-dimensional t-J model SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE t-J model; superconductivity; dynamical cluster approximation ID APPROXIMATION; MECHANISM AB Using an extended dynamical cluster approximation, we study the nature of superconductivity in the two-dimensional t-J model. Short-ranged correlations within a finite cluster are treated explicitly, while the effects of longer-ranged physics are incorporated on the mean-field level with self-consistent Fermionic and Bosonic fields. To solve this cluster problem, we employ a non-crossing approximation which allows for transitions to the symmetry-broken state. At sufficiently low temperatures we find a stable superconducting solution with d-wave order parameter. Upon pairing, the exchange energy is lowered, consistent with an exchange-based pairing mechanism. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Maier, TA (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. EM maierta@ornl.gov RI Maier, Thomas/F-6759-2012 OI Maier, Thomas/0000-0002-1424-9996 NR 14 TC 9 Z9 9 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 APR 30 PY 2005 VL 359 BP 512 EP 514 DI 10.1016/j.physb.2005.01.131 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400157 ER PT J AU Lages, J Sacramento, PD Tesanovic, Z AF Lages, J Sacramento, PD Tesanovic, Z TI Effect of impurities and random pinning on the superconducting vortex state SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE superconductivity; vortices; disorder ID ELECTRONIC-STRUCTURE; BI2SR2CACU2O8+DELTA; CORES AB The presence of impurities affects the quasiparticles via potential scattering and pinning of the vortices, We calculate self-consistently the local density of states of an inhomogeneous superconductor in a magnetic field with a random distribution of impurities. The quasiparticles are only significantly affected by the impurities in their vicinity. In contrast, the random distribution of vortices increases the density of states at low energies by filling the gap in the s-wave case and creating a finite value in the d-wave case. The dominant effect on the quasiparticles is due to the vortex scattering. (c) 2005 Elsevier B.V. All rights reserved. C1 Inst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal. Inst Super Tecn, CFIF, P-1049001 Lisbon, Portugal. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Sacramento, PD (reprint author), Inst Super Tecn, Dept Fis, Av Rovisco Pais, P-1049001 Lisbon, Portugal. EM pdss@cfif.ist.utl.pt RI Sacramento, Pedro D/H-4272-2012; Lages, Jose/D-6660-2013 OI Sacramento, Pedro D/0000-0002-8276-6485; Lages, Jose/0000-0001-5965-8876 NR 10 TC 0 Z9 0 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 APR 30 PY 2005 VL 359 BP 542 EP 544 DI 10.1016/j.physb.2005.01.143 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400167 ER PT J AU Shah, N Lopatin, A Vinokur, VM AF Shah, N Lopatin, A Vinokur, VM TI Low-temperature magnetoresistance of dirty thin films and quantum wires near a parallel-field-tuned superconducting quantum phase transition SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE quantum phase transition; superconductivity; fluctuation conductivity; magnetoresistance ID MAGNETIC-FIELD; INSULATOR TRANSITION AB We study the low-temperature magnetoresistance of dirty thin films and quantum wires close to a quantum phase transition from a superconducting to normal state, induced by applying a parallel magnetic field. We find that the different corrections (Aslamazov-Larkin, density of states and Maki-Thompson) to the normal state conductivity, coming from the superconducting pair fluctuations, are of the same order at zero temperature. There are three regimes at finite temperatures. In the "quantum" regime, which essentially shows a zero-temperature-like behavior, we find a negative magnetoresistance. Since in the "classical" regime the correction is positive, we predict a nonmonotonic magnetoresistance at higher temperatures. (c) 2005 Published by Elsevier B.V. C1 Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. ETH Honggerberg, CH-8093 Zurich, Switzerland. Paul Scherrer Inst, CH-5232 Villigen, Switzerland. RP Vinokur, VM (reprint author), Argonne Natl Lab, Div Sci Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. EM vinokur@msd.anl.gov NR 12 TC 0 Z9 0 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 617 EP 619 DI 10.1016/j.physb.2005.01.169 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400192 ER PT J AU Fehske, H Wellein, G Hager, G Weisse, A Becker, KW Bishop, AR AF Fehske, H Wellein, G Hager, G Weisse, A Becker, KW Bishop, AR TI Luttinger liquid versus charge density wave behaviour in the one-dimensional spinless fermion Holstein model SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE non-fermi liquid behaviour; quantum phase transition; Mott-Hubbard systems AB We discuss the nature of the different ground states of the half-filled Holstein model of spinless fermions in 1D. In the metallic regime we determine the renormalised effective coupling constant and the velocity of the charge excitations by a density-matrix renormalisation group (DMRG) finite-size scaling approach. At low (high) phonon frequencies the Luttinger liquid is characterised by an attractive (repulsive) effective interaction. In the charge-density wave Peierls-distorted state the charge structure factor scales to a finite value indicating long-range order. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany. Univ Erlangen Nurnberg, Reg Rech Erlangen, Erlangen, Germany. Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia. TU Dresden, Inst Theoret Phys, D-01062 Dresden, Germany. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Fehske, H (reprint author), Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany. EM fehske@physik.uni-greifswald.de NR 5 TC 9 Z9 9 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 APR 30 PY 2005 VL 359 BP 699 EP 701 DI 10.1016/j.physb.2005.01.198 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400218 ER PT J AU Continentino, MA Ferreira, AS Pagliuso, PG Rettori, C Sarrao, JL AF Continentino, MA Ferreira, AS Pagliuso, PG Rettori, C Sarrao, JL TI Solid state Pomeranchuk effect SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE Kondo lattice; Pomeranchuk effect AB Recently, we have shown that YbInCu4 and related compounds present a solid state Pomeranchuk effect. These systems have a first-order volume transition where a local moment phase coexists with a renormalized Fermi liquid in analogy with 3 He at its melting curve. We demonstrate here experimentally that the solid state Pomeranchuk effect, controlled by a magnetic field, can be used to produce cooling. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil. UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Continentino, MA (reprint author), Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil. EM mucio@if.uff.br RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Continentino, Mucio/B-7271-2013; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; Continentino, Mucio/0000-0003-0167-8529; NR 5 TC 3 Z9 3 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 APR 30 PY 2005 VL 359 BP 744 EP 746 DI 10.1016/j/physb.2005.01.213 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400233 ER PT J AU Measson, MA Brison, JP Seyfarth, G Braithwaite, D Lapertot, G Salce, B Flouquet, J Lhotel, E Paulsen, C Sugawara, H Sato, H Canfield, PC Izawa, K Matsudae, Y AF Measson, MA Brison, JP Seyfarth, G Braithwaite, D Lapertot, G Salce, B Flouquet, J Lhotel, E Paulsen, C Sugawara, H Sato, H Canfield, PC Izawa, K Matsudae, Y TI Superconductivity of the filled skuterrudite PrOs4Sb12: Phase diagram and characterisations SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE superconductivity; heavy fermion; skutterudite AB We present a precise (H-T) phase diagram of the double superconducting transition in the specific heat of the heavy fermion superconductor PrOs4Sb12, down to 350 mK, on a sample which exhibits two sharp distinct anomalies at T-c1 = 1.89 K and T-c2 = 1.72 K. Comparison with an existing phase diagram based on transport measurements will be reviewed. The intrinsic or extrinsic nature of this double transition is discussed in light of some characterisations of the superconducting transition of different samples and with respect to the historical case of UPt3. Finally, we give a detailed analysis of H-c2 which shows the importance of the multiband character of the electronic structure of PrOs4Sb12 and gives strong support to an even parity order parameter. (c) 2005 Elsevier B.V. All rights reserved. C1 CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble, France. CEA Grenoble, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble, France. Tokyo Metropolitan Univ, Dept Phys, Hashioji, Tokyo 1920397, Japan. Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan. RP Brison, JP (reprint author), CNRS, Ctr Rech Tres Basses Temp, 25 Ave Martyrs,BP166, F-38042 Grenoble, France. EM mmeasson@cea.fr; brison@grenoble.cnrs.fr RI LAPERTOT, Gerard/B-3354-2008; Canfield, Paul/H-2698-2014; Izawa, Koichi/C-8226-2015; Measson, Marie-aude/E-6388-2015 OI Izawa, Koichi/0000-0003-4929-548X; Measson, Marie-aude/0000-0002-6495-7376 NR 10 TC 6 Z9 6 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 827 EP 829 DI 10.1016/j.physb.2005.01.242 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400260 ER PT J AU Drobnik, S Grube, K Pfleiderer, C Lohneysen, HV Bauer, ED Maple, MB AF Drobnik, S Grube, K Pfleiderer, C Lohneysen, HV Bauer, ED Maple, MB TI AC susceptibility studies of the superconductivity of PrOs4Sb12 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE heavy-fermion superconductivity; skutterudites; peak effect ID PHASE-DIAGRAM AB We report the superconducting phase diagram of PrOs4Sb12 deduced from the real-part chi' and the imaginary part chi" of the AC susceptibility. The double transition at T-c1 = 1.85 K and T-c2 = 1.75 K seen in the specific heat may be related to features in chi' and chi", where full diamagnetic shielding is observed below T-c2 only. As function of magnetic field the phase bounded by T-c2 displays features reminiscent of the peak effect. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany. Forschungszentrum Karlsruhe, Inst Festkorperphys, D-76021 Karlsruhe, Germany. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Pfleiderer, C (reprint author), Univ Karlsruhe, Inst Phys, Wolfgang Gaede Str 1, D-76128 Karlsruhe, Germany. EM christian.pfleiderer@pi.uka.de RI Bauer, Eric/D-7212-2011; Pfleiderer, Christian/P-3575-2014 NR 12 TC 6 Z9 6 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 APR 30 PY 2005 VL 359 BP 901 EP 903 DI 10.1016/j.physb.2005.01.257 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400283 ER PT J AU Caspi, EN Dubman, M Ettedgui, H Shaked, H Short, S Jorgensen, JD AF Caspi, EN Dubman, M Ettedgui, H Shaked, H Short, S Jorgensen, JD TI Magnetic and crystallographic properties of HOCO3B2 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE lanthanide intermetallic borides; magnetic structure; neutron diffraction AB AC-susceptibility measurements for HoCo3B2, show paramagnetism below room temperature and a small, and large anomalies at 150 and 10 K, respectively. Neutron powder diffraction measurements show a ferromagnetic order below 10 K, where the ferromagnetic Ho and Co sublattices are ferromagnetically coupled. The magnetic axis direction is perpendicular to the c axis. The observed magnitudes of the magnetic moments at 4.5 K are 5.08(4) and 0.11(2) mu(B), for Ho and Co, respectively. No long range magnetic order was detected above 10 K. (c) 2005 Elsevier B.V. All rights reserved. C1 Nucl Res Ctr Negev, Dept Phys, IL-84190 Beer Sheva, Israel. Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Caspi, EN (reprint author), Nucl Res Ctr Negev, Dept Phys, POB 9001, IL-84190 Beer Sheva, Israel. EM caspie@nren.org.il NR 9 TC 7 Z9 7 U1 3 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 APR 30 PY 2005 VL 359 BP 944 EP 946 DI 10.1016/j.physb.2005.01.271 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400297 ER PT J AU Adroja, DT Park, JG Goremychkin, EA Takeda, N Ishikawa, M McEwen, KA Osborn, R Hillier, AD Rainford, BD AF Adroja, DT Park, JG Goremychkin, EA Takeda, N Ishikawa, M McEwen, KA Osborn, R Hillier, AD Rainford, BD TI Influence of the crystal field potential on the superconducting properties of PrRU(4)Sb(12) SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE superconductivity; crystal fields; inelastic neutron scattering AB We have determined the crystal field potential of the superconductor PrRu(4)Sb(12) (T(c) similar to 0.9 K) using inelastic neutron scattering. The ground state of the Pr(+3) ions in T(h) point group symmetry is a Gamma(1) singlet with a Gamma(5) triplet at an energy of Delta similar to 5.6meV. Comparison with recent results on the PrOs(4)Sb(12) compound, where T(c) similar to 1.85 K and Delta similar to 0.6 meV, supports the conjecture that inelastic quadrupolar fluctuations (or aspherical Coulomb scattering) are responsible for the strong enhancement of T(c). In PrRu(4)Sb(12), the effect is reduced by the higher energy of the first excited level. (c) 2005 Elsevier B.V. All rights reserved. C1 Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England. Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan. UCL, Dept Phys & Astron, London WC1E 6BT, England. Univ Southampton, Dept Phys, Southampton SO17 1BJ, Hants, England. RP Adroja, DT (reprint author), Rutherford Appleton Lab, ISIS Facil, Room UG8,Bldg R3, Didcot OX11 0QX, Oxon, England. EM d.t.adroja@rl.ac.uk RI Osborn, Raymond/E-8676-2011; Park, Je Geun/K-8571-2013; Hillier, Adrian/A-9331-2015 OI Osborn, Raymond/0000-0001-9565-3140; Hillier, Adrian/0000-0002-2391-8581 NR 8 TC 19 Z9 19 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 APR 30 PY 2005 VL 359 BP 983 EP 985 DI 10.1016/j.physb.2005.01.286 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400310 ER PT J AU Harada, A Kotegawa, H Kawasaki, Y Zheng, GQ Kitaoka, Y Yamamoto, E Haga, Y Onuki, Y Itoh, K Haller, EE AF Harada, A Kotegawa, H Kawasaki, Y Zheng, GQ Kitaoka, Y Yamamoto, E Haga, Y Onuki, Y Itoh, K Haller, EE TI Evidence for the microscopic coexistence of superconductivity and ferromagnetism in UGe2 : Ge-73-NMR/NQR study SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE UGe2; NMR/NQR; superconductivity; ferromagnetism ID UGE2 AB We report on the pressure-induced novel phases of ferromagnetism and superconductivity (SC) in the itinerant ferromagnet UGe2 via the Ge-73-NQR measurements under pressure (P). The NQR spectrum has revealed that the ferromagnetic phases are separated into weakly and strongly polarized phases around a critical value of P-c(*) similar to 1.2 GPa, pointing to a first-order transition around P-c(*). Here we present further evidence for the phase separation into ferromagnetic and paramagnetic phases around a critical pressure P-c similar to 1.6GPa. The measurements of nuclear spin-lattice relaxation rate 1/T-1 have probed that SC sets only in the ferromagnetic phase at T-sc similar to 0.2 K, but it does not in the paramagnetic phase. (c) 2005 Published by Elsevier B.V. C1 Osaka Univ, Grad Sch Engn Sci, Dept Mat Sci & Technol, Toyonaka, Osaka 5608531, Japan. Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5600043, Japan. Osaka Univ, Grad Sch Sci, Yokohama, Kanagawa 5600043, Japan. Keio Univ, Dept Appl Phys & Phys Informat, Yokohama, Kanagawa 2238522, Japan. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Harada, A (reprint author), Osaka Univ, Grad Sch Engn Sci, Dept Mat Sci & Technol, Toyonaka, Osaka 5608531, Japan. RI Zheng, Guo-qing/B-1524-2011 NR 6 TC 2 Z9 2 U1 3 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 APR 30 PY 2005 VL 359 BP 1057 EP 1059 DI 10.1016/j.physb.2005.01.283 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400333 ER PT J AU de Visser, A Graf, MJ Opeil, CP Cooley, JC Smith, JL Amato, A Baines, C Gygax, F Schenck, A AF de Visser, A Graf, MJ Opeil, CP Cooley, JC Smith, JL Amato, A Baines, C Gygax, F Schenck, A TI Inhomogeneous magnetic order in Th-doped UPt3 detected by mu SR SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE muon spin spectroscopy; antiferromagnetism; (U, Th)Pt-3 ID SUPERCONDUCTIVITY; PD AB We report on a mu SR study of U1-xThxPt3 (0 <= X <= 0.05) conducted to investigate the onset of "large-moment antiferromagnetism" (LMAF). At low Th content (x <= 0.002) magnetic ordering on the time scale of the mu SR experiment (10(-8)s) is not detected. For x = 0.005 a weak magnetic signal appears below T=2K, while for 0.006 <= x <= 0.05, spontaneous oscillations in the mu SR spectra signal the presence of the LMAF phase. Analysis of the mu SR spectra with a three-component depolarization function reveals that the magnetic phase transition is quite broad. The broadening may be the effect of disorder on the fluctuation spectrum of the small-moment antiferromagnetic state reported for UPt3 below T(N)similar to 6K. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Amsterdam, Van Der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands. Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Paul Scherrer Inst, Lanb Muon Spin Spectroscopy, CH-5232 Villigen, Switzerland. ETH, Inst Particle Phys, CH-5232 Villigen, Switzerland. RP de Visser, A (reprint author), Univ Amsterdam, Van Der Waals Zeeman Inst, Valckenierstr 65, NL-1018 XE Amsterdam, Netherlands. EM devisser@science.uva.nl RI Cooley, Jason/E-4163-2013; Amato, Alex/H-7674-2013 OI Amato, Alex/0000-0001-9963-7498 NR 5 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD APR 30 PY 2005 VL 359 BP 1063 EP 1065 DI 10.1016/j.physb.2005.01.287 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400335 ER PT J AU Hettinger, JD Cooley, JC Hackenberg, RE Peterson, EJ Kelly, AM Papin, PA Smith, JL de Visser, A Graf, MJ AF Hettinger, JD Cooley, JC Hackenberg, RE Peterson, EJ Kelly, AM Papin, PA Smith, JL de Visser, A Graf, MJ TI Specific heat and materials analysis on U1-xThxPt3 for 0 <= x <= 0.05 SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES 04) CY JUL 26-30, 2004 CL Karlsruhe, GERMANY DE UPt3; heavy-fermion; antiferromagnetism; TEM ID SUPERCONDUCTIVITY; ORDER AB UPt3 exhibits anomalous, possibly time-fluctuating antiferromagnetic (AFM) order below 6K. Th substitution induces conventional AFM order with the same magnetic structure. Recent mu SR studies on U1-xThxPt3 for 0 <= x <= 0.05 showed that the transition into the conventional AFM state was sharp for x = 0.05, but broadened for x <= 0.02 (Phys. Rev. B 84 (2003) 224421), indicative of a crossover behavior. We present X-ray diffraction and transmission electron microscopy (TEM) results that show no significant material inhomogeneity in those samples. However, specific heat measurements corroborate the mu SR measurements and show signs of an increase near 7 K for x > 0.01. This supports the conjecture that Th impurities slow down the fluctuating AFM, rendering them observable on the timescale of thermodynamic measurements. (c) 2005 Elsevier B.V. All rights reserved. C1 Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA. Univ Amsterdam, Van Der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA. RP Graf, MJ (reprint author), Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA. EM grafm@bc.edu RI Cooley, Jason/E-4163-2013 NR 5 TC 1 Z9 1 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 APR 30 PY 2005 VL 359 BP 1066 EP 1068 DI 10.1016/j.physb.2005.01.288 PG 3 WC Physics, Condensed Matter SC Physics GA 933SY UT WOS:000229654400336 ER EF