FN Thomson Reuters Web of Science™ VR 1.0 PT J AU RIKOVSKA, J WYSS, R SEMMES, PB AF RIKOVSKA, J WYSS, R SEMMES, PB TI ELECTROMAGNETIC PROPERTIES AND SHAPES OF GROUND-STATES IN PT-AU-HG REGION SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID NUCLEAR MOMENTS; ISOTOPES; COEXISTENCE; TRANSITION; BANDS; SPIN; OS AB We present a comprehensive calculation of odd-A isotopes of Pt, Au and Hg in the mass region 177 less-than-or-equal-to A less-than-or-equal-to 195. Two nuclear models have been used. The particle-triaxial rotor model with modified oscillator s.p. potential (PTR-MO) yielded deformation parameters epsilon2 and gamma as a result of fitting to a wide range of experimental data. Also, mean field calculations based on the Woods-Saxon potential with Strutinsky shell corrections were performed to predict deformation parameters beta2, beta4 and gamma form Total Routhian Surfaces (TRS). Subsequent PTR calculation using these deformation Parameters and Woods-Saxon s.p.potential (PTR-WS) yielded ground state properties of all nuclei in question in very good agreement with experiment. The deformation parameters epsilon2 and beta2 showed the same general trend as a function of neutron number.The fitted parameter gamma from (PTR-MO) calculation indicated a smooth change from prolate (N - 100) to oblate shape (N - 115) via triaxial in Pt,Au and Hg. The value of gamma extracted from TRS calculations predicts a smooth change in Pt isotopes but much sharper change in Au and Hg nuclei. C1 ORNL,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. TENNESSEE TECHNOL UNIV,DEPT PHYS,COOKEVILLE,TN 38505. RP RIKOVSKA, J (reprint author), UNIV OXFORD,CLARENDON LAB,DEPT PHYS,PARKS RD,OXFORD OX1 3PU,ENGLAND. NR 20 TC 9 Z9 9 U1 0 U2 1 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 59 EP 66 DI 10.1007/BF02398964 PG 8 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200006 ER PT J AU ZIMMERMAN, BE WALTERS, WB MANTICA, PF CARTER, HK BOOTH, MG RIKOVSKA, J STONE, NJ AF ZIMMERMAN, BE WALTERS, WB MANTICA, PF CARTER, HK BOOTH, MG RIKOVSKA, J STONE, NJ TI DETERMINATION OF THE MAGNETIC DIPOLE-MOMENT OF SB-114 VIA ONLINE NUCLEAR ORIENTATION SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID ONLINE AB The magnetic dipole moment of 114Sb has been measured using on-line nuclear orientation (OLNO) at the UNISOR Nuclear orientation FaCility (UNISOR/NOF). The value was determined to be 1.72(8) nuclear magnetons. The observed anisotropy of the 1299 keV transition was fitted as a function of temperature making allowance for incomplete thermalization of the 114Sb nuclei prior to decay. The relaxation constant, C(k), is discussed, as is the ground state structure of 114Sb. C1 OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37830. UNIV OXFORD,CLARENDON LAB,DEPT PHYS,OXFORD OX1 3PU,ENGLAND. RP ZIMMERMAN, BE (reprint author), UNIV MARYLAND,DEPT CHEM,COLL PK,MD 20742, USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 117 EP 124 DI 10.1007/BF02398970 PG 8 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200012 ER PT J AU HERCZEG, P AF HERCZEG, P TI THEORETICAL ASPECTS OF SEARCHES FOR NEW INTERACTIONS USING ORIENTED NUCLEI SO HYPERFINE INTERACTIONS LA English DT Article ID ELECTRIC-DIPOLE MOMENT; TIME-REVERSAL INVARIANCE; RIGHT-HANDED CURRENTS; LEFT-RIGHT SYMMETRY; BETA-DECAY; CP-VIOLATION; PARITY VIOLATION; WEAK INTERACTION; T-INVARIANCE; NEUTRON-SCATTERING AB We review and discuss the information provided by some low-energy nuclear processes on physics beyond the standard model of the fundamental interactions. We focus on probes where nuclear orientation is either essential or helpful. RP HERCZEG, P (reprint author), LOS ALAMOS NATL LAB, DIV THEORET, GRP B-5, MAIL STOP B283, LOS ALAMOS, NM 87545 USA. NR 128 TC 22 Z9 23 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 127 EP 151 PG 25 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200013 ER PT J AU POSTMA, H BOWMAN, JD BOWMAN, CD BUSH, JE DELHEIJ, PPJ FRANKLE, CM GOULD, CR HAASE, DG KNUDSON, J MITCHELL, GE PENTTILA, S ROBERSON, NR SEESTROM, SJ SZYMANSKY, JJ YOO, SH YUAN, VW ZHU, X AF POSTMA, H BOWMAN, JD BOWMAN, CD BUSH, JE DELHEIJ, PPJ FRANKLE, CM GOULD, CR HAASE, DG KNUDSON, J MITCHELL, GE PENTTILA, S ROBERSON, NR SEESTROM, SJ SZYMANSKY, JJ YOO, SH YUAN, VW ZHU, X TI PARITY VIOLATION AT NEUTRON P-WAVE RESONANCES OF U-238 AND TH-232 AND RELATED QUESTIONS SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID RADIATIVE-CAPTURE REACTION; SPATIAL PARITY; NONCONSERVATION; LA-139; ASYMMETRY; NP-237; TC-93 AB Parity violation effects have been studied at 40 neutron p-wave resonances of the even-even nuclei U-238 and Th-232. Of these 11 show parity Violation effects larger than 2 standard deviations, making parity violation a rather common phenomenon. Parity mixing up to 10% has been found. The root-mean squared matrix elements for parity violation derived from these resonances are M=0.58 (+0.50/-0.25) meV for U-238, respectively 1.39 (+0.35/-0.38) meV for Th-232. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. TUNL,DURHAM,NC 27706. N CAROLINA STATE UNIV,RALEIGH,NC 27695. TRIUMF,VANCOUVER V6T 2A3,BC,CANADA. DUKE UNIV,DURHAM,NC 27706. RP POSTMA, H (reprint author), DELFT UNIV TECHNOL,DEPT APPL PHYS,POB 5046,2600 GA DELFT,NETHERLANDS. RI Gould, Christopher/M-7676-2013 NR 29 TC 2 Z9 2 U1 0 U2 1 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 153 EP 163 DI 10.1007/BF02398972 PG 11 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200014 ER PT J AU KOSTER, JE DAVIS, ED GOULD, CR HAASE, DG ROBERSON, NR SEAGONDOLLAR, LW AF KOSTER, JE DAVIS, ED GOULD, CR HAASE, DG ROBERSON, NR SEAGONDOLLAR, LW TI TEST OF TIME-REVERSAL INVARIANCE IN 2-MEV NEUTRON-SCATTERING FROM ALIGNED HO-165 SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID T-VIOLATION; NUCLEI AB We describe a search for the time reversal non-invariant five-fold correlation (s . I x k)(I . k) in the scattering of 2 MeV polarized neutrons from an aligned Ho-165 target. Here s is the neutron spin, I is the target spin, and k is the neutron momentum vector. Differences in transmission were sought when s was reversed. The target was a single crystal of holmium, cryogenically aligned with a specially built dilution refrigerator. Rotating the target axis of alignment while cold permits the parity-even, five-fold correlation to be identified among other spin-dependent correlations in the forward elastic scattering amplitude. An analyzing power was found to be (1 +/- 6) x 10(-4), consistent with time reversal invariance. We obtain a bound of 5 x 10(-3) for alpha(T), the ratio of T-odd to T-even couplings in the effective nucleon-nucleon interaction. C1 TRIANGLE UNIV NUCL LAB,DURHAM,NC 27706. N CAROLINA STATE UNIV,DEPT PHYS,RALEIGH,NC 27695. DUKE UNIV,DURHAM,NC 27706. UNIV ARIZONA,TUCSON,AZ 85721. RP KOSTER, JE (reprint author), LOS ALAMOS NATL LAB,MS-H803,LOS ALAMOS,NM 87545, USA. RI Gould, Christopher/M-7676-2013 NR 30 TC 1 Z9 1 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 165 EP 172 DI 10.1007/BF02398973 PG 8 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200015 ER PT J AU BUCHINGER, F SCHUESSLER, HA BENCK, EC IIMURA, H LI, YF BINGHAM, C CARTER, HK AF BUCHINGER, F SCHUESSLER, HA BENCK, EC IIMURA, H LI, YF BINGHAM, C CARTER, HK TI ISOTOPE SHIFT MEASUREMENTS ON THE NEUTRON-DEFICIENT THALLIUM ISOTOPES SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID UPDATE AB Isotope shifts of the neutron-deficient thallium isotopes were measured on-line at the UNISOR mass separator. Spectroscopy was carried out using collinear fast beam laser spectroscopy in neutral thallium. The changes of the mean square charge radii were derived from the measurements. The changes in charge radii of the I=7 isotopes, including the newly measured 188Tl, are compared to the results in mercury and lead. C1 TEXAS A&M UNIV SYST,DEPT PHYS,COLL STN,TX 77843. OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RP BUCHINGER, F (reprint author), MCGILL UNIV,FOSTER RADIAT LAB,MONTREAL H3A 2B2,QUEBEC,CANADA. NR 10 TC 1 Z9 1 U1 1 U2 1 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 367 EP 371 DI 10.1007/BF02398993 PG 5 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200035 ER PT J AU MANTICA, PF KERN, BD ZIMMERMAN, BE WALTERS, WB RIKOVSKA, J STONE, NJ AF MANTICA, PF KERN, BD ZIMMERMAN, BE WALTERS, WB RIKOVSKA, J STONE, NJ TI THE MEASUREMENT OF BETA-ASYMMETRIES AT UNISOR NOF USING EXTERNAL PLASTIC SCINTILLATOR DETECTORS SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES AB The performance of two external plastic scintillator detectors has been tested in an off-line mode using a source of (RuFe)-Ru-106 at UNISOR/NOF. The measurement of beta asymmetries at various temperatures has resulted in the reproduction of the previously-determined magnetic dipole moment for the 1+ ground state of Rh-106 and in addition the conclusion that the sign of this moment is positive. C1 UNIV KENTUCKY,DEPT PHYS & ASTRON,LEXINGTON,KY 40506. UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLL PK,MD 20742. UNIV OXFORD,CLARENDON LAB,OXFORD,ENGLAND. RP MANTICA, PF (reprint author), OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37830, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 415 EP 421 DI 10.1007/BF02398998 PG 7 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200040 ER PT J AU DENG, JK HAMILTON, JH RAMAYYA, AV MA, WC ZHAO, XW KORMICKI, J SEVERIJNS, N VANNESTE, L HAMILTON, WD MANTICA, PF CARTER, HK AF DENG, JK HAMILTON, JH RAMAYYA, AV MA, WC ZHAO, XW KORMICKI, J SEVERIJNS, N VANNESTE, L HAMILTON, WD MANTICA, PF CARTER, HK TI ONLINE NUCLEAR ORIENTATION OF AS-70 SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID STATES AB On-line nuclear orientation was performed on As-70. Anisotropy data have been obtained at 8.7mK for 29 gamma transitions. Multipole mixing ratios have been extracted for 17 transitions. Our results are in good agreement with existing data for the ten previously measured transitions. Our first time data for the 1496 keV, 2+ --> 2+ gamma-ray suggest the 2536 keV level is a good candidate for a mixed symmetry level. C1 UNIV LEUVEN,DEPT PHYS,B-3001 LOUVAIN,BELGIUM. HHIRF,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. RP DENG, JK (reprint author), VANDERBILT UNIV,DEPT PHYS,NASHVILLE,TN 37235, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 439 EP 445 DI 10.1007/BF02399001 PG 7 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200043 ER PT J AU GUMMIN, MA KRANE, KS XU, Y LAM, T ZGANJAR, EF BREITENBACH, JB ZIMMERMAN, BE CARTER, HK MANTICA, PF AF GUMMIN, MA KRANE, KS XU, Y LAM, T ZGANJAR, EF BREITENBACH, JB ZIMMERMAN, BE CARTER, HK MANTICA, PF TI NUCLEAR-STRUCTURE STUDIES OF IR-187 VIA ONLINE NUCLEAR ORIENTATION SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID ENERGIES AB A more complete level scheme is presented here for the decay of 187Pt, incorporating many new lines and levels up to 2.4 MeV. Emphasis has been placed on the extraction of multipole mixing ratios from nuclear orientation data. Analysis of that data, however, required a more complete understanding of the level structure (including, in particular, branching ratios, conversion coefficients, and level feedings), prompting the collection of new spectroscopy data. The low-lying, positive-parity levels are described in terms of (odd-proton) single-particle Nilsson states coupled to a triaxial core. Multipole mixing ratios are compared to those calculated in the Particle-Plus-Triaxial-Rotor Model. C1 LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803. GEORGIA INST TECHNOL,SCH PHYS,ATLANTA,GA 30332. UNIV MARYLAND,DEPT CHEM,COLL PK,MD 20742. OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. RP GUMMIN, MA (reprint author), OREGON STATE UNIV,DEPT PHYS,CORVALLIS,OR 97331, USA. NR 16 TC 1 Z9 1 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 447 EP 455 DI 10.1007/BF02399002 PG 9 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200044 ER PT J AU XU, Y KRANE, KS GUMMIN, MA WOOD, JL JARRIO, MM BREITENBACH, JB ZGANJAR, EF RUPNIK, D CARTER, HK MANTICA, PF ZIMMERMAN, BE AF XU, Y KRANE, KS GUMMIN, MA WOOD, JL JARRIO, MM BREITENBACH, JB ZGANJAR, EF RUPNIK, D CARTER, HK MANTICA, PF ZIMMERMAN, BE TI ONLINE NUCLEAR ORIENTATION STUDY OF AU-184 SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES ID SHAPE COEXISTENCE; MONOPOLE STRENGTH; ISOTOPES AB The 18Au --> 184Pt decay, studied on-line with the UNISOR facility at HHIRF, is discussed. Gamma-ray and conversion-electron spectroscopy of 184Pt as well as on-line nuclear orientation measurements of 184Au were done. A new low-lying level scheme of 184Pt is proposed. Two coexisting bands with different deformations and their respective gamma-vibrational bands are established. Internal conversion coefficients for interband transitions between states with the same spin are extracted from the spectroscopy measurements. The relative E0 contents of the transitions are determined by combining internal conversion coefficients with E2/M1 mixing ratios deduced from gamma-ray anisotropies measured from oriented nuclei. C1 GEORGIA INST TECHNOL,SCH PHYS,ATLANTA,GA 30332. LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803. OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. UNIV MARYLAND,DEPT CHEM,COLL PK,MD 20742. RP XU, Y (reprint author), OREGON STATE UNIV,DEPT PHYS,CORVALLIS,OR 97331, USA. NR 9 TC 2 Z9 2 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 481 EP 487 DI 10.1007/BF02399005 PG 7 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200047 ER PT J AU DENG, JK HAMILTON, JH RAMAYYA, AV RIKOVSKA, J STONE, NJ CROFT, WL PIERCEY, RB MORGAN, JC MANTICA, PF AF DENG, JK HAMILTON, JH RAMAYYA, AV RIKOVSKA, J STONE, NJ CROFT, WL PIERCEY, RB MORGAN, JC MANTICA, PF TI TEST OF A SYMMETRICAL 4-DETECTOR COMPTON POLARIMETER USING LOW-TEMPERATURE NUCLEAR ORIENTATION SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL CONF ON ON-LINE NUCLEAR ORIENTATION ( OLNO-2 ) CY OCT 16-19, 1991 CL JOINT INST HEAVY ION RES, OAK RIDGE, TN SP JOINT INST HEAVY ION & RES, UNIV ISOTOPE SEPARATOR OAK RIDGE HO JOINT INST HEAVY ION RES AB A symmetrical four-detector Compton polarimeter was used to measure the linear polarization of gamma-rays emitted from nuclei oriented by the hyperfine interaction at low temperature, Its polarization detection efficiency was determined in the range 0.3-1.4 MeV and compared with some other polarimeters. C1 HHIRF,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. UNIV OXFORD,DEPT PHYS,OXFORD,ENGLAND. MISSISSIPPI STATE UNIV,MISSISSIPPI STATE,MS 39762. OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. RP DENG, JK (reprint author), VANDERBILT UNIV,DEPT PHYS,NASHVILLE,TN 37235, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 75 IS 1-4 BP 519 EP 524 DI 10.1007/BF02399007 PG 6 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA KB552 UT WOS:A1992KB55200049 ER PT J AU SCHUESSLER, HA BENCK, EC BUCHINGER, F IMURA, H LI, YF BINGHAM, C CARTER, HK AF SCHUESSLER, HA BENCK, EC BUCHINGER, F IMURA, H LI, YF BINGHAM, C CARTER, HK TI NUCLEAR MOMENTS OF THE NEUTRON-DEFICIENT THALLIUM ISOTOPES SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON LASERS IN NUCLEAR PHYSICS CY SEP 09-10, 1991 CL NISHINA HALL, RIKEN, SAITAMA, JAPAN SP INST PHYS & CHEM RES, OSAKA UNIV, RES CTR NUCL PHYS, INOUE FDN SCI HO NISHINA HALL, RIKEN ID LASER SPECTROSCOPY AB The nuclear moments of the neutron-deficient Tl-187,Tl-188 isotopes were determined by measuring the hyperfine structure splittings of the lambda = 535 nm line in neutral thallium. An optical efficiency of 2 x 10(-4) photons per radioactive ion was achieved using collinear fast beam laser spectroscopy with a large solid angle fiber optical array detector. Most of the moments can be interpreted fairly well in the single particle model. C1 MCGILL UNIV,FOSTER RADIAT LAB,MONTREAL H3A 2B,QUEBEC,CANADA. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. RP SCHUESSLER, HA (reprint author), TEXAS A&M UNIV SYST,DEPT PHYS,COLL STN,TX 77843, USA. NR 10 TC 7 Z9 7 U1 1 U2 1 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 74 IS 1-4 BP 13 EP 21 DI 10.1007/BF02398612 PG 9 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA JX407 UT WOS:A1992JX40700004 ER PT J AU WEBER, M SCHWAB, A BECKER, D LYNN, KG AF WEBER, M SCHWAB, A BECKER, D LYNN, KG TI SOLID NEON MODERATED ELECTROSTATIC OR MAGNETIC POSITRON BEAM SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT 6TH POSITRON WORKSHOP : POSITRON INTERACTIONS WITH GASES CY JUL 03-05, 1991 CL MACQUARIE UNIV, SYDNEY, AUSTRALIA SP AUSTR DEPT IND TECHNOL & COMMERCE, BILATERAL SCI & TECHNOL PROGRAM HO MACQUARIE UNIV AB A high intensity variable energy positron beam has been constructed at Brookhaven National Laboratory (BNL). Positrons from a 97 mCi Na-22 source are moderated by a thin layer of solid neon. A magnetic guiding system delivered up to 5 X 10(6) e+/sec to an experiment. Currently, tests are under way to facilitate the operation with the magnetic guiding system or - for other experimental sites - with an electrostatic beam transport. The electrostatic lenses are fabricated from mu-metal. No compensation of the earth's magnetic field is required. Several experiments can utilize the beam on a time-sharing basis. In the near future, the source will be replaced by Cu-64, which has a much higher activity. Beam intensities up to 10(9) e+/sec are expected. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP WEBER, M (reprint author), UNIV BIELEFELD,FAK PHYS D1,W-4800 BIELEFELD 1,GERMANY. NR 14 TC 6 Z9 6 U1 0 U2 1 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 73 IS 1-2 BP 147 EP 157 PG 11 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA JH307 UT WOS:A1992JH30700012 ER PT J AU PERLOW, GJ AF PERLOW, GJ TI TEMPORAL OPTICS OF RECOIL-FREE GAMMA-RADIATION SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON NUCLEAR ZEEMAN EFFECT AND RECENT ADVANCES IN MOSSBAUER SPECTROSCOPY, IN HONOR OF PROFESSOR STANLEY S. HANNA CY MAR 15, 1991 CL STANFORD UNIV, STANFORD, CA SP DUPONT MERCK, AMERSHAM, APD CRYOGENICS, CANBERRA IND HO STANFORD UNIV ID QUANTUM BEATS AB A discussion is given of the time-behavior of recoil-free gamma-radiation passing through a resonant medium. The classical dispersion theory of Hamermesh is extended to account for different linewidths in source or absorber so that a synchrotron-radiation source can be simulated. A result, essentially the same as that of Kagan et al., follows in the limit of large source width. A review is given of the quantum beats which result from the absorption of one line of a frequency-modulation spectrum. An example is given of the measurement of second-order Doppler shift in Fe-Be by the method of quantum beats. Finally, there is a discussion of the measurement by quantum beats of the very small energy shift in a Co-57-Cu source by a magnetic field. RP PERLOW, GJ (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. NR 15 TC 3 Z9 3 U1 0 U2 3 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 72 IS 1-3 BP 51 EP 62 PG 12 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA JA840 UT WOS:A1992JA84000006 ER PT J AU KIMBALL, CW DABROWSKI, B LIANG, YH PENG, WM DUNLAP, BD AF KIMBALL, CW DABROWSKI, B LIANG, YH PENG, WM DUNLAP, BD TI MOSSBAUER STUDIES OF MAGNETIC-BEHAVIOR OF 3D-DOPED REBA2CU3-XFEXO7+DELTA(RE=Y,ER,DY,GD) SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON NUCLEAR ZEEMAN EFFECT AND RECENT ADVANCES IN MOSSBAUER SPECTROSCOPY, IN HONOR OF PROFESSOR STANLEY S. HANNA CY MAR 15, 1991 CL STANFORD UNIV, STANFORD, CA SP DUPONT MERCK, AMERSHAM, APD CRYOGENICS, CANBERRA IND HO STANFORD UNIV ID NEUTRON POWDER DIFFRACTION; SUPERCONDUCTIVITY; ORDER; EXCITATIONS; RELAXATION; SYSTEMS; GD; FE AB A Mossbauer study has been made on Fe-57 ions substituted into the Cu(1) site of REBa2Cu3-xFexO7+delta (RE = Y, Er, Dy, Gd; x = 0.15, 0.30). At low temperature, the iron atoms antiferromagnetically order with a transition temperature which is dependent on the Fe concentration. The temperature dependence of the magnetic subspectra representing Fe ions with various local oxygen environments in YBa2Cu3-xFexO7+delta and ErBa2Cu3-xFexO7+delta fit a 2D-Ising model with a ratio of the anisotropic exchange between the two directions on the order of 0.5-1.0(10(-3)) for the Y-compounds and on the order of 1 for the Er-compounds. The magnitude of the local dopant magnetization is related to a short-range chemical order which determines the magnetic chain size and defines the correlation lengths. For the Y-compound, the order is quasi-1 D with strong intrachain but very weak interchain coupling. For the Er-compounds, the magnetic coupling is Ising 2D. The strong fluctuation behavior expected in low dimensional systems above and below T(N) is observed via characteristic relaxation in the Mossbauer linewidth near T(N). For both the Dy- and Gd-compounds, the magnetic order is 3 D. The magnitude of the rare-earth magnetic moments appears to affect the character of the magnetic interaction in the Cu(l)-site. However, a Mossbauer effect measurement at Gd-155 nuclei in GdBa2Cu2.85Fe0.15O7+ delta (TN(Fe) approximately 14 K) shows paramagnetic behavior at 4.9 K. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP KIMBALL, CW (reprint author), NO ILLINOIS UNIV,DE KALB,IL 60115, USA. NR 34 TC 7 Z9 7 U1 0 U2 2 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 72 IS 1-3 BP 153 EP 172 DI 10.1007/BF02398862 PG 20 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA JA840 UT WOS:A1992JA84000013 ER PT J AU TAYLOR, RD PASTERNAK, MP AF TAYLOR, RD PASTERNAK, MP TI HIGH-PRESSURE MOSSBAUER-SPECTROSCOPY IN DIAMOND ANVIL CELLS SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON NUCLEAR ZEEMAN EFFECT AND RECENT ADVANCES IN MOSSBAUER SPECTROSCOPY, IN HONOR OF PROFESSOR STANLEY S. HANNA CY MAR 15, 1991 CL STANFORD UNIV, STANFORD, CA SP DUPONT MERCK, AMERSHAM, APD CRYOGENICS, CANBERRA IND HO STANFORD UNIV ID EPSILON-FE; METALLIZATION AB Diamond anvil cells provide a means to obtain near-hydrostatic pressures from the kilobar to the megabar regime. Mossbauer spectroscopy (MS) nicely complements the optical and X-ray measurements usually made. After a brief summary of the techniques applicable to MS, we present several examples of high-pressure MS, including hysteresis in the alpha-epsilon-transition in Fe, metallization in molecular crystals and the insulator- metal Mott transition in NiI2 and CoI2. C1 TEL AVIV UNIV,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. RP TAYLOR, RD (reprint author), LOS ALAMOS NATL LAB,DIV PHYS,LOS ALAMOS,NM 87545, USA. NR 25 TC 0 Z9 0 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 72 IS 1-3 BP 241 EP 250 PG 10 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA JA840 UT WOS:A1992JA84000019 ER PT J AU REZAIESEREJ, S HOY, GR TAYLOR, RD AF REZAIESEREJ, S HOY, GR TAYLOR, RD TI STATUS OF THE SEARCH FOR THE MOSSBAUER-EFFECT IN AG-109 SO HYPERFINE INTERACTIONS LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON THE APPLICATIONS OF THE MOSSBAUER EFFECT CY SEP 16-20, 1991 CL NANJING, PEOPLES R CHINA SP INT UNION PURE & APPL PHYS, INT UNION PURE & APPL CHEM, INT CTR THEORET PHYS, CHINESE NUCL SOC, NATL NAT SCI FDN CHINA, KANSAI ELECTR CO JAPAN AB Our search for the Mossbauer Effect in Ag-109 using the self-absorption method in summarized. Measurements have been made using two different Cd-109-doped single-crystal silver samples. In our method the silver K(alpha) and K(beta) x rays, as well as, the 88-keV gamma-rays are considered. The results are analyzed using the ratio of the number of x-ray to gamma-ray counts. A positive effect is observed. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP REZAIESEREJ, S (reprint author), OLD DOMINION UNIV,DEPT PHYS,NORFOLK,VA 23529, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU BALTZER SCI PUBL BV PI AMSTERDAM PA ASTERWEG 1A, 1031 HL AMSTERDAM, NETHERLANDS SN 0304-3843 J9 HYPERFINE INTERACT JI Hyperfine Interact. PY 1992 VL 71 IS 1-4 BP 1425 EP 1432 DI 10.1007/BF02397351 PG 8 WC Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Physics, Nuclear SC Physics GA HW085 UT WOS:A1992HW08500044 ER PT J AU DIJAILI, SP WIESENFELD, JM RAYBON, G BURRUS, CA DIENES, A SMITH, JS WHINNERY, JR AF DIJAILI, SP WIESENFELD, JM RAYBON, G BURRUS, CA DIENES, A SMITH, JS WHINNERY, JR TI CROSS-PHASE MODULATION IN A SEMICONDUCTOR-LASER AMPLIFIER DETERMINED BY A DISPERSIVE TECHNIQUE SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID OPTICAL PULSES; INJECTION-LASERS; SELF-PHASE; PROPAGATION; COMPRESSION; FIBERS; IMAGE AB Cross-phase modulation in a semiconductor laser diode amplifier is reported. A simple expression for the chirp imparted on a weak signal pulse by the action of a strong pump pulse is derived. A novel dispersive technique for characterizing the resulting nonlinear chirp is introduced and used in the present experiment. A maximum frequency excursion of 16 GHz due to the cross-phase modulation was measured. A value of 6 was found for alpha(xpm) which is a factor for characterizing the cross-phase modulation in a similar manner to the conventional linewidth enhancement factor-alpha. C1 UNIV CALIF BERKELEY,DEPT ELECT ENGN & COMP SCI,BERKELEY,CA 94720. AT&T BELL LABS,CRAWFORD HILL LAB,PHOTON RES LAB,HOLMDEL,NJ 07733. RP DIJAILI, SP (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 24 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD JAN PY 1992 VL 28 IS 1 BP 141 EP 150 DI 10.1109/3.119508 PG 10 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA GZ837 UT WOS:A1992GZ83700022 ER PT J AU HADLEY, GR AF HADLEY, GR TI TRANSPARENT BOUNDARY-CONDITION FOR THE BEAM PROPAGATION METHOD SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article AB A new boundary condition is presented for use in beam propagation calculations that passes outgoing radiation freely with minimum reflection coefficient (as low as 3 x 10(-8)). In conjunction with a standard Crank-Nicholson finite difference scheme, the assumption that the radiation field behaves as a complex exponential near the boundary is shown to result in a specific transparent boundary condition algorithm. In contrast to the commonly used absorber method, this algorithm contains no adjustable parameters, and is thus problem independent. It is shown herein to be accurate and robust for both two- and three-dimensional problems. RP HADLEY, GR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 10 TC 270 Z9 288 U1 4 U2 19 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD JAN PY 1992 VL 28 IS 1 BP 363 EP 370 DI 10.1109/3.119536 PG 8 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA GZ837 UT WOS:A1992GZ83700050 ER PT J AU MYERS, DR VAWTER, GA JONES, ED ZIPPERIAN, TE DRUMMOND, TJ FRITZ, IJ DAWSON, LR BRENNAN, TM HAMMONS, BE DATYE, AK SIMONS, DS COMAS, J AF MYERS, DR VAWTER, GA JONES, ED ZIPPERIAN, TE DRUMMOND, TJ FRITZ, IJ DAWSON, LR BRENNAN, TM HAMMONS, BE DATYE, AK SIMONS, DS COMAS, J TI RAPID-THERMAL ANNEALING FOR QUANTUM-WELL HETEROSTRUCTURE DEVICE FABRICATION SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article ID STRAINED-LAYER SUPERLATTICES; ION-IMPLANTATION; LASERS AB We examine ion implantation and rapid-thermal processing for the fabrication of quantum-well, compound-semiconductor heterostructure devices in strained and in lattice-matched material systems. We demonstrate improvements to the performance of two classes of devices that would be particularly sensitive to process-induced defects: p-channel strained-quantum-well field-effect transistors and single-quantum-well diode lasers. We correlated the device results with secondary-ion mass spectroscopy, Hall-effect, transmission-electron microscopy, and photoluminescence. C1 UNIV NEW MEXICO,DEPT CHEM & NUCL ENGN,ALBUQUERQUE,NM 87106. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. RP MYERS, DR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. OI Datye, Abhaya/0000-0002-7126-8659 NR 29 TC 7 Z9 7 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD JAN PY 1992 VL 39 IS 1 BP 41 EP 49 DI 10.1109/16.108210 PG 9 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA GV120 UT WOS:A1992GV12000004 ER PT J AU JILES, DC THOELKE, JB DEVINE, MK AF JILES, DC THOELKE, JB DEVINE, MK TI NUMERICAL DETERMINATION OF HYSTERESIS PARAMETERS FOR THE MODELING OF MAGNETIC-PROPERTIES USING THE THEORY OF FERROMAGNETIC HYSTERESIS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article AB This paper describes how the various model parameters needed to describe hysteresis on the basis of the Jiles-Atherton theory can be calculated from experimental measurements of the coercivity, remanence, saturation magnetization, initial anhysteretic susceptibility, initial normal susceptibility, and the maximum differential susceptibility. The determination of hysteresis parameters based on this limited set of magnetic properties is of the most practical use since these are the properties of magnetic materials that are most likely to be available. RP JILES, DC (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012 NR 8 TC 282 Z9 308 U1 4 U2 36 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 27 EP 35 DI 10.1109/20.119813 PG 9 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000004 ER PT J AU BOSSERT, RC BRANDT, JS CARSON, JA COULTER, K DELCHAMPS, S EWALD, K FULTON, H GONCZY, I KOSKA, W LAMM, MJ STRAIT, JB WAKE, M GORDON, M HASSAN, N SIMS, R WINTERS, M AF BOSSERT, RC BRANDT, JS CARSON, JA COULTER, K DELCHAMPS, S EWALD, K FULTON, H GONCZY, I KOSKA, W LAMM, MJ STRAIT, JB WAKE, M GORDON, M HASSAN, N SIMS, R WINTERS, M TI CONSTRUCTION EXPERIENCES WITH SSC COLLIDER DIPOLE MAGNETS AT FERMILAB SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Full length and short model SSC 50 mm bore dipoles are being built and tested at Fermilab. Mechanical design of these magnets has been determined from experience involved in the construction of previous superconducting magnets. Construction experience includes coil fabrication, ground insulation, instrumentation, collaring and yoke assembly. Fabrication techniques are explained. Construction problems and their solutions are reviewed. Relationship of short to long model construction is discussed. C1 FERMI NATL ACCELERATOR LAB,SSC MAGNET PROJECT,SUPERCONDUCTING SUPER COLLIDER LAB,BATAVIA,IL 60510. RP BOSSERT, RC (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 129 EP 132 DI 10.1109/20.119826 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000017 ER PT J AU LAMM, MJ BLEADON, M COULTER, KJ DELCHAMPS, S HANFT, R JAFFERY, TS KINNEY, W KOSKA, W OZELIS, JP STRAIT, J WAKE, M DIMARCO, J AF LAMM, MJ BLEADON, M COULTER, KJ DELCHAMPS, S HANFT, R JAFFERY, TS KINNEY, W KOSKA, W OZELIS, JP STRAIT, J WAKE, M DIMARCO, J TI MAGNETIC-FIELD MEASUREMENTS OF 1.5-METER MODEL SSC COLLIDER DIPOLE MAGNETS AT FERMILAB SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Magnetic field measurements have been performed at Fermilab on 1.5 m magnetic length model dipoles for the Superconducting Supercollider. Harmonic measurements are recorded at room temperature before and after the collared coil is assembled into the yoke and at liquid helium temperature. Measurements are made as a function of longitudinal position and excitation current. High field data are compared with room temperature measurements of both the collared coil and the completed yoked magnet and with the predicted fields for both the body of the magnet and the coil ends. C1 SSC LAB,DALLAS,TX 75237. RP LAMM, MJ (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 133 EP 136 DI 10.1109/20.119827 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000018 ER PT J AU STRAIT, J BOSSERT, R CARSON, J COULTER, KJ DELCHAMPS, S JAFFERY, TS KINNEY, W KOSKA, W GOURLAY, S LAMM, MJ WAKE, M SIMS, R WINTERS, M AF STRAIT, J BOSSERT, R CARSON, J COULTER, KJ DELCHAMPS, S JAFFERY, TS KINNEY, W KOSKA, W GOURLAY, S LAMM, MJ WAKE, M SIMS, R WINTERS, M TI MECHANICAL-BEHAVIOR OF FERMILAB-BUILT 1.5-M MODEL SSC COLLIDER DIPOLES SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT ID MAGNETS AB Several model SSC collider dipole magnets (50 mm aperture, 1.5 m magnetic length) have been built and tested at Fermilab. These magnets are instrumented with strain gauges to measure stresses in the coil, the cold mass shell, and the coil end clamp assembly. Measurements are made of these quantities during assembly, cooldown, excitation, and warmup. Additional mechanical measurements are made on magnet sub-assemblies during manufacturing. Data from these measurements are presented and compared with expectations from the design calculations. RP STRAIT, J (reprint author), FERMI NATL ACCELERATOR LAB,SSCL MAGNET PROJECT,SUPERCONDUCTING SUPER COLLIDER LAB,BATAVIA,IL 60510, USA. NR 11 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 137 EP 140 DI 10.1109/20.119828 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000019 ER PT J AU WAKE, M BOSSERT, R CARSON, J COULTER, K DELCHAMPS, S GOURLAY, S JAFFERY, TS KINNEY, W KOSKA, W LAMM, MJ STRAIT, J SIMS, R WINTERS, M AF WAKE, M BOSSERT, R CARSON, J COULTER, K DELCHAMPS, S GOURLAY, S JAFFERY, TS KINNEY, W KOSKA, W LAMM, MJ STRAIT, J SIMS, R WINTERS, M TI QUENCH BEHAVIOR OF 1.5-M MODEL SSC COLLIDER DIPOLE MAGNETS AT FERMILAB SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB The quench behaviors of 10 model dipole magnets for the Superconducting Super Collider have been studied. Horizontally split yoke, vertically split yoke and the latest 50 mm diameter design were compared in the quench characteristics. The excitation results showed a good progress of the R&D program. SSC magnets can now be built with no training to the required field of 6.65 T at 4.3 K. C1 SSC LAB,DALLAS,TX 75237. RP WAKE, M (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 141 EP 144 DI 10.1109/20.119829 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000020 ER PT J AU ORRELL, D NOBREGA, F LILLY, J SNITCHLER, G JAYAKUMAR, J VENKATRAMAN, V BRANDT, JS AF ORRELL, D NOBREGA, F LILLY, J SNITCHLER, G JAYAKUMAR, J VENKATRAMAN, V BRANDT, JS TI MECHANICAL AND ELECTROMAGNETIC DESIGN OF THE SSC QSE101 QUADRUPOLE ENDS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB The SSC collider magnets feature grouped ends in which cables of a particular coil remain stacked together as they are bent around the end. Methods have been developed to form the ends in such a way that mechanical stresses are lowered and field quality is optimized. This paper discusses techniques of end turn design and presents calculations of harmonics and peak fields for the SSC quadrupole QSE101. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP ORRELL, D (reprint author), SSC LAB,DIV MAGNET,DALLAS,TX 75237, USA. NR 4 TC 1 Z9 1 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 145 EP 147 DI 10.1109/20.119830 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000021 ER PT J AU BLEADON, ME BROWN, BC CHESTER, NS DESAVOURET, E GARVEY, JD GLASS, HD HARDING, DJ HARFOUSH, FA HOLMES, SD HUMBERT, JC KERBY, JS KNAUF, AB KOBLISKA, GR LIPSKI, A MARTIN, PS MAZUR, PO ORRIS, DF OSTIGUY, JF PEGGS, SG PACHNIK, JE PEWITT, EG SATTI, JA SCHMIDT, EE SIM, JW SNOWDON, SC WALBRIDGE, DG AF BLEADON, ME BROWN, BC CHESTER, NS DESAVOURET, E GARVEY, JD GLASS, HD HARDING, DJ HARFOUSH, FA HOLMES, SD HUMBERT, JC KERBY, JS KNAUF, AB KOBLISKA, GR LIPSKI, A MARTIN, PS MAZUR, PO ORRIS, DF OSTIGUY, JF PEGGS, SG PACHNIK, JE PEWITT, EG SATTI, JA SCHMIDT, EE SIM, JW SNOWDON, SC WALBRIDGE, DG TI THE FERMILAB MAIN INJECTOR DIPOLE CONSTRUCTION TECHNIQUES AND PROTOTYPE MAGNET MEASUREMENTS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB The Fermilab Main Injector Project will provide 120-150 GeV Proton and Antiproton Beams for Fermilab Fixed Target Physics and Colliding Beams Physics use. A dipole magnet has been designed and prototypes constructed for the principal bending magnets of this new accelerator. The design considerations and fabrication techniques are described. Measurement results on prototypes are reported, emphasising the field uniformity achieved in both body field and end field at excitation levels from injection at 0.1 T to full field of 1.7 T. RP BLEADON, ME (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 160 EP 163 DI 10.1109/20.119834 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000025 ER PT J AU WANDERER, P ANERELLA, M COTTINGHAM, J GANETIS, G GARBER, M GHOSH, A GOODZEIT, C GREENE, A GUPTA, R HERRERA, J KAHN, S KELLY, E MEADE, A MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R SKARITKA, J THOMPSON, P WILLEN, E AF WANDERER, P ANERELLA, M COTTINGHAM, J GANETIS, G GARBER, M GHOSH, A GOODZEIT, C GREENE, A GUPTA, R HERRERA, J KAHN, S KELLY, E MEADE, A MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R SKARITKA, J THOMPSON, P WILLEN, E TI PERFORMANCE OF TRIM COILS MADE BY A NOVEL METHOD SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB A precision, automated method of manufacturing trim coils based on printed circuit technology has been developed. Excellent quench performance and increased radiation resistance have been achieved in recently-tested models of sextupole trim coils developed for operation inside 40 mm-aperture SSC Main Collider dipoles. RP WANDERER, P (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 3 TC 0 Z9 0 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 164 EP 166 DI 10.1109/20.119835 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000026 ER PT J AU KOSKA, W BLEADON, M BOSSERT, R CARSON, J DELCHAMPS, S GOURLAY, S HANFT, R KUCHNIR, M LAMM, MJ MANTSCH, P MAZUR, PO ORRIS, D STRAIT, J WAKE, M BUSH, T COOMBES, R DEVRED, A DIMARCO, J GOODZEIT, C KUZMINSKI, J OGITSU, T PUGLISI, M RADUSEWICZ, P SCHERMER, R TOMPKINS, JC WOLF, Z YU, Y ZHENG, H COTTINGHAM, J GANETIS, G GARBER, M GHOSH, A GREENE, A GUPTA, R KAHN, S HERRERA, J KELLY, E MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R THOMPSON, P WANDERER, P WILLEN, E ROYET, J SCANLAN, R TAYLOR, C AF KOSKA, W BLEADON, M BOSSERT, R CARSON, J DELCHAMPS, S GOURLAY, S HANFT, R KUCHNIR, M LAMM, MJ MANTSCH, P MAZUR, PO ORRIS, D STRAIT, J WAKE, M BUSH, T COOMBES, R DEVRED, A DIMARCO, J GOODZEIT, C KUZMINSKI, J OGITSU, T PUGLISI, M RADUSEWICZ, P SCHERMER, R TOMPKINS, JC WOLF, Z YU, Y ZHENG, H COTTINGHAM, J GANETIS, G GARBER, M GHOSH, A GREENE, A GUPTA, R KAHN, S HERRERA, J KELLY, E MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R THOMPSON, P WANDERER, P WILLEN, E ROYET, J SCANLAN, R TAYLOR, C TI TESTS OF FERMILAB BUILT 40-MM APERTURE FULL LENGTH SSC DIPOLE MAGNETS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Several 40 mm aperture, 17 m long dipoles have been built by Fermilab as developmental prototypes for the Superconducting Super Collider. These magnets differ from those manufactured at Brookhaven National Laboratory in that they have an external inner-outer coil splice design, a collet style end clamp assembly, a new, analytically designed minimum stress coil end design, and a new insulation system which does not employ shims or "shoes". In addition, the magnets were built using production-style tooling. The magnets were tested at the Fermilab Magnet Testing Facility. Quench testing and mechanical measurement results are presented and analyzed with emphasis on the new design and fabrication features of these magnets. C1 SSC LAB,DALLAS,TX 75237. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP KOSKA, W (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. OI Mantsch, Paul/0000-0002-8382-7745 NR 11 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 303 EP 306 DI 10.1109/20.119871 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000062 ER PT J AU WANDERER, P ANERELLA, M COTTINGHAM, J GANETIS, G GARBER, M GHOSH, A GREENE, A GUPTA, R HERRERA, J KAHN, S KELLY, E MEADE, A MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R THOMPSON, P WILLEN, E BLEADON, M HANFT, R KUCHNIR, M MANTSCH, P MAZUR, PO ORRIS, D PETERSON, T STRAIT, J ROYET, J SCANLAN, R TAYLOR, C BUSH, T COOMBES, R DEVRED, A DIMARCO, J GOODZEIT, C KUZMINSKI, J OGITSU, T PUGLISI, M RADUSEWICZ, P SANGER, P SCHERMER, R TOMPKINS, J TURNER, J WOLF, Z YU, Y ZHENG, H AF WANDERER, P ANERELLA, M COTTINGHAM, J GANETIS, G GARBER, M GHOSH, A GREENE, A GUPTA, R HERRERA, J KAHN, S KELLY, E MEADE, A MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R THOMPSON, P WILLEN, E BLEADON, M HANFT, R KUCHNIR, M MANTSCH, P MAZUR, PO ORRIS, D PETERSON, T STRAIT, J ROYET, J SCANLAN, R TAYLOR, C BUSH, T COOMBES, R DEVRED, A DIMARCO, J GOODZEIT, C KUZMINSKI, J OGITSU, T PUGLISI, M RADUSEWICZ, P SANGER, P SCHERMER, R TOMPKINS, J TURNER, J WOLF, Z YU, Y ZHENG, H TI RESULTS OF MAGNETIC-FIELD MEASUREMENTS OF 40-MM APERTURE 17-M LONG SSC MODEL COLLIDER DIPOLE MAGNETS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Magnetic field measurements have been made on twelve 17 m-long, 40 mm-aperture R&D superconducting dipoles. Data on dipole field strength, multipole coefficients, and alignment have been obtained. The data indicate that the magnets as built are generally within the expectations for this design. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. SSC LAB,DALLAS,TX 75237. RP WANDERER, P (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. OI Mantsch, Paul/0000-0002-8382-7745 NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 307 EP 310 DI 10.1109/20.119872 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000063 ER PT J AU KUZMINSKI, J BUSH, T COOMBES, R DEVRED, A DIMARCO, J GOODZEIT, C PUGLISI, M RADUSEWICZ, P SANGER, P SCHERMER, R TOMPKINS, JC WOLF, Z YU, Y ZHENG, H OGITSU, T ANERELLA, M COTTINGHAM, J GANETIS, G GARBER, M GOSH, A GREENE, A GUPTA, R HERRERA, J KAHN, S KELLY, E MEADE, A MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R THOMPSON, P WANDERER, P WILLEN, E BLEADON, M HANFT, R KUCHNIR, M MANTSCH, P MAZUR, PO ORRIS, D PETERSON, T STRAIT, J ROYET, J SCANLAN, R TAYLOR, C AF KUZMINSKI, J BUSH, T COOMBES, R DEVRED, A DIMARCO, J GOODZEIT, C PUGLISI, M RADUSEWICZ, P SANGER, P SCHERMER, R TOMPKINS, JC WOLF, Z YU, Y ZHENG, H OGITSU, T ANERELLA, M COTTINGHAM, J GANETIS, G GARBER, M GOSH, A GREENE, A GUPTA, R HERRERA, J KAHN, S KELLY, E MEADE, A MORGAN, G MURATORE, J PRODELL, A REHAK, M ROHRER, EP SAMPSON, W SHUTT, R THOMPSON, P WANDERER, P WILLEN, E BLEADON, M HANFT, R KUCHNIR, M MANTSCH, P MAZUR, PO ORRIS, D PETERSON, T STRAIT, J ROYET, J SCANLAN, R TAYLOR, C TI TEST-RESULTS OF BNL BUILT 40-MM APERTURE, 17-M-LONG SSC COLLIDER DIPOLE MAGNETS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Eleven 17 m long, 40 mm aperture SSC R&D superconducting collider dipole magnets, built at BNL, have been extensively tested at BNL and Fermilab during 1990-91. Quench performance of these magnets and details of their mechanical behavior are presented. C1 KEK NAT LAB HIGH ENERGY PHYS,NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. BROOKHAVEN NATL LAB,UPTON,NY 11973. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP KUZMINSKI, J (reprint author), SSC LAB,2550 BECKLEYMEADE AVE,DALLAS,TX 75231, USA. NR 7 TC 1 Z9 1 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 311 EP 314 DI 10.1109/20.119873 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000064 ER PT J AU TAYLOR, CE BARALE, P BENJEGERDES, R CASPI, S DELLORCO, D FRITZ, D GILBERT, W LIETZKE, A MIRK, K PETERS, C SCANLAN, R WANDESFORDE, A AF TAYLOR, CE BARALE, P BENJEGERDES, R CASPI, S DELLORCO, D FRITZ, D GILBERT, W LIETZKE, A MIRK, K PETERS, C SCANLAN, R WANDESFORDE, A TI QUADRUPOLE MAGNETS FOR THE SSC COLLIDER SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB A 40 mm bore 211 T/m quadrupole magnet has been designed and tested at LBL. There are 8 coils of 30 strand cable arranged in 2 layers in a cos 2-theta distribution, supported by 18 mm thick collars, preassembled into 146 mm long packs, and rigidly aligned in a cold-iron yoke. The design, construction details, and test results are given for three 1 m models and the first 5 m model. RP TAYLOR, CE (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 6 TC 4 Z9 4 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 315 EP 318 DI 10.1109/20.119874 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000065 ER PT J AU MCINTURFF, AD FLORA, R NORRIS, B THEILACKER, J AUGUSTYNOWICZ, SA DICKEY, CE TOOL, G WOLFF, DA WALLIS, DB WEISEND, JG AF MCINTURFF, AD FLORA, R NORRIS, B THEILACKER, J AUGUSTYNOWICZ, SA DICKEY, CE TOOL, G WOLFF, DA WALLIS, DB WEISEND, JG TI HALF CELL SSC 40-MM APERTURE MAGNET STRING SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB The data given here were obtained during a controls and system check out run. This run basically had all of the proper accelerator controls as well as, in the background, an independent magnet test facility monitor and protection. Early data are presented on the heat loads of some circuits and quench performance of the two magnet string used. The heat loads found were high and the quench performance appeared to be better than expected. After disassembly occurred, obvious causes were present for some of the heat load. C1 SUPERCOND SUPER COLLIDER LAB,DALLAS,TX 75237. RP MCINTURFF, AD (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 512 EP 515 DI 10.1109/20.119924 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000115 ER PT J AU YAMADA, R EARTLY, D OSTIGUY, JF JOSTLEIN, H ANTIPOV, Y DENISOV, D CHEKULAEV, S AF YAMADA, R EARTLY, D OSTIGUY, JF JOSTLEIN, H ANTIPOV, Y DENISOV, D CHEKULAEV, S TI MAGNETIC CHARACTERISTICS OF THE D0 DETECTOR SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB In the D0 detector, muon momentum is measured by deflection through toroidal iron magnets. The general features of these magnets are discussed. We describe design calculations performed with the two-dimensional codes POISSON and ANSYS. Full three-dimensional calculations performed with the code TOSCA are also presented. Magnetic field and flux measurements are described and compared with the calculations. C1 PROTVINO HIGH ENERGY PHYS INST,PROTVINO,USSR. RP YAMADA, R (reprint author), FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. RI Chekulaev, Sergey/O-1145-2015 NR 9 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 520 EP 523 DI 10.1109/20.119926 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000117 ER PT J AU CASSEL, R GROSS, G HARVEY, A MATTISON, T AF CASSEL, R GROSS, G HARVEY, A MATTISON, T TI MANUFACTURE OF FAST-PULSED MAGNETS FOR THE SLC DAMPING RINGS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB A second-generation fast kicker magnet (and its power supply) was designed by Fermilab for the SLC electron damping ring [1]. The requirements were to inject and extract two bunches of electrons, with the following magnetic field specifications: Integral peak magnetic field = 0.021 T-m Rise/fall time (0-100%) = 56.03 ns maximum "Flat-top" duration = 61.63 ns The "flat-top" does not imply a plateau, but two time-stable spots of equal magnitude, since the electron bunches are short (20 ps). Many of the early problems with these magnets [2] have been studied intensely during the last two years, and substantial progress has been made. In particular, vacuum potting with room-temperature curing silicone rubber (RTV) has been refined to give reliable high-voltage service up to 18 kV/mm, and lifetimes of about a year despite stored beam intensities of 3 x 10(10) electrons/bunch at 120 pps. Further improvements in RTV formulation are suggested, and the direction of future insulation-system development is indicated. RP CASSEL, R (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 557 EP 559 DI 10.1109/20.119936 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000127 ER PT J AU KARPUSHOV, ID KLIMENKO, EY MALOFEEV, AM MARTOVETSKY, NN MOKHNATUK, VA NOVIKOV, SI CHERNOPLEKOV, NA BONDARCHUK, EN DEDURIN, AM EGOROV, SA FILATOV, OG TROKHACHEV, GV HENNING, CD HEIM, JR MILLER, JR SLACK, DS MARSTON, PG AF KARPUSHOV, ID KLIMENKO, EY MALOFEEV, AM MARTOVETSKY, NN MOKHNATUK, VA NOVIKOV, SI CHERNOPLEKOV, NA BONDARCHUK, EN DEDURIN, AM EGOROV, SA FILATOV, OG TROKHACHEV, GV HENNING, CD HEIM, JR MILLER, JR SLACK, DS MARSTON, PG TI SUPERCONDUCTING MAGNET FOR L-STAR DETECTOR SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT C1 EFREMOV DIV ELECTROPHYS APPARATUS RES INST,LENINGRAD 189631,USSR. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139. RP KARPUSHOV, ID (reprint author), KURCHATOV ATOM ENERGY INST,MOSCOW 123182,USSR. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 701 EP 704 DI 10.1109/20.119976 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000166 ER PT J AU GREEN, MI BARALE, P CALLAPP, L CASEFORTIER, M LERNER, D NELSON, D SCHERMER, R SKIPPER, G VANDYKE, D CORK, C HALBACH, K HASSENZAHL, W HOYER, E MARKS, S HARTEN, T LUCHINI, K MILBURN, J TANABE, J ZUCCA, F KELLER, R SELPH, F GILBERT, W GREEN, MA ONEIL, J SCHAFER, R TAYLOR, C GREIMAN, W HALL, D MACFARLANE, J AF GREEN, MI BARALE, P CALLAPP, L CASEFORTIER, M LERNER, D NELSON, D SCHERMER, R SKIPPER, G VANDYKE, D CORK, C HALBACH, K HASSENZAHL, W HOYER, E MARKS, S HARTEN, T LUCHINI, K MILBURN, J TANABE, J ZUCCA, F KELLER, R SELPH, F GILBERT, W GREEN, MA ONEIL, J SCHAFER, R TAYLOR, C GREIMAN, W HALL, D MACFARLANE, J TI MAGNETIC MEASUREMENTS AT LAWRENCE-BERKELEY-LABORATORY SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Recent magnetic measurement activities at LBL have been concentrated in two separate areas, electro-magnets and permanent magnets for the Advanced Light Source (ALS), and superconducting magnets for the Superconducting Super Collider Laboratory (SSCL). A survey of the many different measurement systems is presented. These include: AC magnetic measurements of an ALS booster dipole engineering model magnet, dipole moment measurements of permanent magnet blocks for ALS wigglers and undulators, permeability measurements of samples destined for wiggler and undulator poles, harmonic error analysis of SSC one meter model dipoles and quadrupoles and five meter long SSC prototype quadrupoles, harmonic error analysis of ALS dipoles, quadrupoles, and sextupoles, precision Hall probe mapping of ALS storage ring combined function magnets, and the design of the ALS insertion device magnetic mapping system. We also describe a new UNIX based data acquisition system that is being developed for the SSC. Probes used for magnetic measurements include Helmholtz coils, integral coils, point coils, and bucking harmonic analysis coils, several different types of Hall probes, and nuclear magnetic resonance magnetometers. Both analog and digital integrators are used with the coils. Some problems that occurred and their rectification is described. The mechanisms used include rotating systems with optical encoders, X-Y mapping systems with optical encoders and a laser position measuring device. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ADV DEV PROJECT GRP,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,SUPER CONDUCTING MAGNET GRP,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ALS INSERT DEVICE GRP,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ALS BEAMLINE MAGNETS GRP,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,AS ACCELERATOR GRP,BERKELEY,CA 94720. RP GREEN, MI (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,MAGNET MEASUREMENTS GRP,BERKELEY,CA 94720, USA. NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 797 EP 800 DI 10.1109/20.119998 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000189 ER PT J AU MORGAN, GH AF MORGAN, GH TI A COMPUTER-PROGRAM FOR THE 2-D MAGNETOSTATIC PROBLEM BASED ON INTEGRAL-EQUATIONS FOR THE FIELD OF THE CONDUCTORS AND BOUNDARY ELEMENTS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB The iterative design of the 2-dimensional cross section of a beam transport magnet having infinitely permeable iron boundaries requires a fast means of computing the field of the conductors. Solutions in the form of series expansions are used for rectangular iron boundaries [1], and programs based on the method of images are used to simulate circular iron boundaries. A single procedure or program for dealing with an arbitrary iron boundary would be useful. The present program has been tested with rectangular and circular iron boundaries and provision has been made for the use of other curves. It uses complex contour integral equations for the field of the constant-current density conductors and complex line integrals for the field of the piecewise-linear boundary elements. RP MORGAN, GH (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 912 EP 915 DI 10.1109/20.120026 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000218 ER PT J AU CASPI, S HELM, M LASLETT, LJ AF CASPI, S HELM, M LASLETT, LJ TI MAGNETIC-FIELD IN THE END REGION OF THE SSC QUADRUPOLE MAGNET SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB Recent advances in methods of computing magnetic fields have made it possible to study the field in the end region of the SSC quadrupole magnet in detail. The placement of conductor in the straight section, away from the ends, was designed to produce a practically pure quadrupole field in the two-dimensional sense. The ends of the coils were designed to produce a practically pure quadrupole field in the integral sense using a method that ignores the presence of the iron yoke. Subsequently, the effect of the presence of the yoke on the field was analyzed. The paper presents the end configuration together with the computed integrated multipole components, local multipole components, and local field components. A comparison with measurements is included. RP CASPI, S (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 942 EP 945 DI 10.1109/20.120034 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000226 ER PT J AU LASLETT, LJ CASPI, S HELM, M BRADY, V AF LASLETT, LJ CASPI, S HELM, M BRADY, V TI 3-DIMENSIONAL MAGNETIC-FIELD PRODUCED BY AN AXISYMMETRICAL IRON YOKE SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT AB A computational procedure, in which separate analyses are performed for conductor and high permeability iron yoke, has been developed for calculating the three-dimensional (3-D) magnetic field components. Whereas the field components of the isolated 3-D current array can be evaluated at all desired points through the use of a 3-D Biot-Savart law program, we have developed a method for calculating the supplemental field that will arise as a result of the presence (coaxially) of a surrounding high-permeability magnetic yoke with an axially-symmetric bore. We may speak of this supplemental field as an "image field" although we shall realize that it may be possible in general to attribute it only to a distinctly diffuse distribution of "image current" or magnetic moments. The boundary associated with the "image field" is such that at each point along the boundary of the high permeability iron the total scalar potential shall be constant, e.g. V(i) = -V(d) (where i = image and d = direct). When we describe both potentials as a series of "harmonic components" then the nature of the boundary condition is such that a de-coupling of one harmonic from another is preserved, and therefore it is also true that V(i)(n) = -V(d)(n) at the iron interface, where n is a harmonic number. When we solve the appropriate differential equations for these scalar potential functions throughout the iron-free region with the proper applied boundary condition for the scalar potential of each harmonic number, we achieve upon summation the appropriate field contribution of the surrounding high-permeability iron. RP LASLETT, LJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,1 CYCLOTRON RD,BLDG 46-161,BERKELEY,CA 94720, USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 946 EP 948 DI 10.1109/20.120035 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000227 ER PT J AU SCHULTZ, JH HALE, JR MINERVINI, J STEEVES, M WONG, RL AF SCHULTZ, JH HALE, JR MINERVINI, J STEEVES, M WONG, RL TI SIMULATIONS OF QUENCH AND RECOVERY IN CICC CONDUCTORS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 12TH INTERNATIONAL CONF ON MAGNET TECHNOLOGY CY JUN 23-28, 1991 CL ST PETERSBURG, USSR SP I V KURCHATOV INST ATOM ENERGY, ALL UNION RES & DEV INST CABLE IND, A A BOCHVAR ALL UNION SCI RES INST INORGAN MAT C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP SCHULTZ, JH (reprint author), MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139, USA. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1992 VL 28 IS 1 BP 967 EP 970 DI 10.1109/20.120041 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HG220 UT WOS:A1992HG22000233 ER PT J AU GOLDBERG, DA LASLETT, LJ RIMMER, RA AF GOLDBERG, DA LASLETT, LJ RIMMER, RA TI MODES OF ELLIPTIC WAVE-GUIDES - A CORRECTION - REPLY SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Letter RP GOLDBERG, DA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD JAN PY 1992 VL 40 IS 1 BP 175 EP 176 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA GZ387 UT WOS:A1992GZ38700029 ER PT J AU BISCHOF, CH SHROFF, GM AF BISCHOF, CH SHROFF, GM TI ON UPDATING SIGNAL SUBSPACES SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article ID CHOLESKY FACTORIZATION; CONDITION NUMBER; MATRIX; ALGORITHMS; RANK AB We develop an algorithm for adaptively estimating the noise subspace of a data matrix, as is required in signal processing applications employing the "signal subspace" approach. The noise subspace is estimated using a rank-revealing QR factorization instead of the more expensive singular value or eigenvalue decompositions. Using incremental condition estimation to monitor the smallest singular values of triangular matrices, we can update the rank-revealing triangular factorization inexpensively when new rows are added and old rows are deleted. Experiments demonstrate that the new approach usually requires O(n2) work to update an n x n matrix, and accurately tracks the noise subspace. C1 RENSSELAER POLYTECH INST,DEPT COMP SCI,TROY,NY 12180. RP BISCHOF, CH (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. RI Bischof, Christian/D-2897-2009 NR 39 TC 60 Z9 62 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD JAN PY 1992 VL 40 IS 1 BP 96 EP 105 DI 10.1109/78.157185 PG 10 WC Engineering, Electrical & Electronic SC Engineering GA GW232 UT WOS:A1992GW23200010 ER PT J AU HUSTON, MA AF HUSTON, MA TI BIOLOGICAL DIVERSITY AND HUMAN-RESOURCES SO IMPACT OF SCIENCE ON SOCIETY LA English DT Article AB All living organisms, including humans, require the same essential resources to survive. Potential conflicts between human use of these resources and the preservation of biological diversity can be minimized through an understanding of the natural processes that regulate biological diversity. Preservation of some components of the earth's biological diversity may require little sacrifice of agriculturally productive lands, while preservation of other components will demand some form of economic subsidy to accommodate both human needs and the preservation of biodiversity. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI Huston, Michael/B-1434-2009 OI Huston, Michael/0000-0001-9513-1166 NR 2 TC 0 Z9 0 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0019-2872 J9 IMPACT SCI SOC PY 1992 VL 42 IS 2 BP 121 EP 130 PG 10 WC Social Issues SC Social Issues GA HY274 UT WOS:A1992HY27400002 ER PT J AU SHOOK, M LI, DC LAKE, LW AF SHOOK, M LI, DC LAKE, LW TI SCALING IMMISCIBLE FLOW THROUGH PERMEABLE MEDIA BY INSPECTIONAL ANALYSIS SO IN SITU LA English DT Article AB Despite decades of results on scaling by dimensional and inspectional analysis disagreements remain about the number of dimensionless groups required for a specific problem. Inconsistencies also persist in the form of the groups themselves. This paper presents a general procedure of inspectional analysis that will derive the minimum number of the most succinct form of independent dimensionless groups. As an illustration, we find that five dimensionless groups are required to describe the immiscible displacement of oil by water in a two-dimension, homogeneous, anisotropic vertical cross section. Previous work has stated that this problem can be scaled by three or fewer groups. In addition, we show that inspectional analysis provides a means to derive a general measure of the approach to vertical equilibrium. We apply the dimensionless groups to interpret the breakthrough oil recovery of three large-scale waterfloods. C1 UNIV TEXAS,DEPT PETR ENGN,AUSTIN,TX 78712. RP SHOOK, M (reprint author), IDAHO NATL ENGN LABS,IDAHO FALLS,ID 83415, USA. NR 38 TC 73 Z9 75 U1 0 U2 7 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0146-2520 J9 IN SITU JI In Situ PY 1992 VL 16 IS 4 BP 311 EP 349 PG 39 WC Energy & Fuels; Engineering, Chemical; Engineering, Petroleum; Engineering, Geological; Mining & Mineral Processing SC Energy & Fuels; Engineering; Mining & Mineral Processing GA KD692 UT WOS:A1992KD69200003 ER PT J AU MALLINSON, RG BRAUN, RL WESTBROOK, CK BURNHAM, AK AF MALLINSON, RG BRAUN, RL WESTBROOK, CK BURNHAM, AK TI DETAILED CHEMICAL-KINETICS STUDY OF THE ROLE OF PRESSURE IN BUTANE PYROLYSIS SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID HEXANE PYROLYSIS AB A detailed free-radical kinetic model has been developed to represent the pyrolysis of n-butane and has been used to study the role of pressure on the pyrolysis. The temperature range covered is from 200 to 600-degrees-C with pressures from 1 to 1000 atm. Simulations were conducted for isothermal, isobaric, homogeneous systems with pure n-butane as the initial reactant. At high temperature, increasing the pressure increases the decomposition rate of butane, as well as increasing the breadth of the carbon number distribution and decreasing the olefins content. Model results agree well with the literature. At low temperature, the rate of decomposition of butane is inhibited by increasing pressures until relatively high pressures, above 100 atm, when the rate increases with higher pressures. Increased pressures at lower temperatures also favor larger products and fewer olefins, but different mechanistic pathways control the decomposition. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP MALLINSON, RG (reprint author), UNIV OKLAHOMA,SCH CHEM ENGN & MAT SCI,NORMAN,OK 73019, USA. NR 22 TC 23 Z9 25 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD JAN PY 1992 VL 31 IS 1 BP 37 EP 45 DI 10.1021/ie00001a006 PG 9 WC Engineering, Chemical SC Engineering GA GZ068 UT WOS:A1992GZ06800008 ER PT J AU HARRIOTT, P MARKUSSEN, JM AF HARRIOTT, P MARKUSSEN, JM TI KINETICS OF SORBENT REGENERATION IN THE COPPER-OXIDE PROCESS FOR FLUE-GAS CLEANUP SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article AB In a regenerable process for flue gas cleanup, CuO supported on Al2O3 reacts with SO2 and O2 to form CuSO4. The sorbent can be regenerated with CH4, but the reaction is slow and strongly inhibited by the SO2 produced. The kinetics of regeneration were studied using a thermal balance reactor, and the influence of the kinetics on design and operation of a reactor is discussed. RP HARRIOTT, P (reprint author), US DOE,PITTSBURGH ENERGY RES CTR,POB 10940,PITTSBURGH,PA 15213, USA. NR 8 TC 24 Z9 24 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD JAN PY 1992 VL 31 IS 1 BP 373 EP 379 DI 10.1021/ie00001a051 PG 7 WC Engineering, Chemical SC Engineering GA GZ068 UT WOS:A1992GZ06800053 ER PT J AU LEWIS, CLS NEELY, D ONEILL, D UHOMOIBHI, J CAIRNS, G MACPHEE, A TALLENTS, GJ KRISHNAN, J DWIVEDI, L KEY, MH NORREYS, P KODAMA, R BURGE, RE SLARK, G BROWN, M PERT, GJ HOLDEN, P LIGHTBODY, M RAMSDEN, SA ZHANG, J SMITH, C JAEGLE, P JAMELOT, G CARILLON, A KLISNICK, A RAUCOURT, JP TREBES, JE CARTER, MR MROWKA, S NUGENT, KA AF LEWIS, CLS NEELY, D ONEILL, D UHOMOIBHI, J CAIRNS, G MACPHEE, A TALLENTS, GJ KRISHNAN, J DWIVEDI, L KEY, MH NORREYS, P KODAMA, R BURGE, RE SLARK, G BROWN, M PERT, GJ HOLDEN, P LIGHTBODY, M RAMSDEN, SA ZHANG, J SMITH, C JAEGLE, P JAMELOT, G CARILLON, A KLISNICK, A RAUCOURT, JP TREBES, JE CARTER, MR MROWKA, S NUGENT, KA TI COLLISION PUMPED SOFT-X-RAY LASERS - PROGRESS AT RAL SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB Recent developments and progress on collision pumped soft X-ray lasers using the VULCAN glass laser at Rutherford-Appleton Laboratory are presented. This includes saturated output operation of a double target germanium system within a low Fresnel number half-cavity, measurement of the spatial coherence of the output beam in the above and other geometries, use of the beam to demonstrate almost-equal-to 0.15 mum spatial resolution in a full-field microscope and initial studies of other Ne-like and Ni-like systems. Future directions, in the light of new developments of VULCAN facilities, are outlined. C1 UNIV ESSEX, COLCHESTER CO4 3SQ, ESSEX, ENGLAND. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV LONDON KINGS COLL, LONDON WC2R 2LS, ENGLAND. UNIV YORK, YORK YO1 5DD, N YORKSHIRE, ENGLAND. UNIV OXFORD, OXFORD OX1 3PU, ENGLAND. UNIV PARIS 11, LSAI, F-91405 ORSAY, FRANCE. LLNL, LIVERMORE, CA 94550 USA. UNIV MELBOURNE, PARKVILLE, VIC 3052, AUSTRALIA. UNIV HULL, KINGSTON HULL HU6 7RX, N HUMBERSIDE, ENGLAND. RP LEWIS, CLS (reprint author), QUEENS UNIV BELFAST, BELFAST BT7 1NN, ANTRIM, NORTH IRELAND. RI Klisnick, Annie/C-5532-2008; Nugent, Keith/J-2699-2012; Klisnick, Annie/F-1152-2011; Nugent, Keith/I-4154-2016 OI Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 17 TC 0 Z9 0 U1 3 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 23 EP 30 PG 8 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700004 ER PT J AU BUSHAW, BA AF BUSHAW, BA TI ATTOGRAM MEASUREMENT OF RARE ISOTOPES BY CW RESONANCE IONIZATION MASS-SPECTROMETRY SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID CHARGE RADII; STRONTIUM AB Three-color double-resonance ionization mass spectrometry, using two single-frequency cw dye lasers and a cw carbon dioxide laser, has been applied to the detection of attogram quantities of rare radionuclides. Pb-210 has been MeasUred in human hair and brain tissue samples to assess indoor radon exposure. Measurements on Sr-90 have shown overall isotopic selectivity of greater than 10(9) despite unfavorable isotope shifts relative to the major stable isotope, Sr-88. RP BUSHAW, BA (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 31 EP 36 PG 6 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800008 ER PT J AU MATHEWS, DL AF MATHEWS, DL TI THE LIVERMORE X-RAY LASER PROGRAM SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB I will report on the status of x-ray laser development and its applications at Livermore. I will review some of our recent results and comment on where our future research is headed including plans for developing a compact x-ray laser users facility. Finally, I will briefly summarize the results of an X-ray Laser Applications Workshop that was held in San Francisco in January 1992. RP MATHEWS, DL (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 31 EP 35 PG 5 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700005 ER PT J AU ENRIGHT, GD DUNN, J VILLENEUVE, DM MAXON, S BALDIS, HA OSTERHELD, AL LAFONTAINE, B KIEFFER, JC NANTEL, M PEPIN, H AF ENRIGHT, GD DUNN, J VILLENEUVE, DM MAXON, S BALDIS, HA OSTERHELD, AL LAFONTAINE, B KIEFFER, JC NANTEL, M PEPIN, H TI A SEARCH FOR GAIN IN AN NI-LIKE TIN PLASMA SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID X-RAY AMPLIFICATION; LASER; GERMANIUM AB The x-ray and XUV emission from a laser-produced tin plasma has been studied in a line-focus geometry. Two 4d-4p transitions for which gain is expected have been identified. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. INRS ENERGIE, VARENNES J3X 1S2, PQ, CANADA. RP ENRIGHT, GD (reprint author), NATL RES COUNCIL CANADA, OTTAWA K1A 0R6, ONTARIO, CANADA. RI Villeneuve, David/I-4140-2012 OI Villeneuve, David/0000-0002-2810-3648 NR 17 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 45 EP 48 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700008 ER PT J AU NILSEN, J PORTER, JL DASILVA, LB MACGOWAN, BJ AF NILSEN, J PORTER, JL DASILVA, LB MACGOWAN, BJ TI DEMONSTRATION OF A NEON-LIKE RUBIDIUM X-RAY LASER SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB We demonstrate a rubidium ion laser with two strong laser lines at 173 and 176 angstrom. The lasing transitions are 3p --> 3s transitions in neon-like rubidium. Several weaker lasing transitions are also observed. Wavelengths of the five lasing transitions are reported. Gains of 1.9 and 1.4 cm-1 are measured for the two strongest lines. The weaker gain than other neon-like laser systems is ascribed to poor target quality coupled with the dilution associated with using RbCl. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP NILSEN, J (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 53 EP 56 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700010 ER PT J AU SHIMKAVEG, GM CARTER, MR WALLING, RS TICEHURST, JM LONDON, RA STEWART, RE AF SHIMKAVEG, GM CARTER, MR WALLING, RS TICEHURST, JM LONDON, RA STEWART, RE TI OSCILLATOR-AMPLIFIER EXPERIMENTS IN NEON-LIKE YTTRIUM SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB We present the first results from spatially and temporally separated x-ray lasing plasmas, shot sequentially with the emission of the first directed into the second. RP SHIMKAVEG, GM (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, L-43, LIVERMORE, CA 94550 USA. NR 3 TC 0 Z9 0 U1 3 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 61 EP 66 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700012 ER PT J AU PAGE, RH DROPINSKI, SC WORDEN, EF STOCKDALE, JAD AF PAGE, RH DROPINSKI, SC WORDEN, EF STOCKDALE, JAD TI RESONANCE IONIZATION SPECTROSCOPY OF ZIRCONIUM ATOMS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID LASER; LIFETIMES AB We have examined the stepwise-resonant three-photon-ionization spectrum of neutral Zirconium atoms using three separately-tunable pulsed visible dye lasers. Lifetimes of even-parity levels (measured with the delayed-photoionization technique) range from 10 to 100 nsec. Direct ionization cross sections appear to be less than 10(-17) cm2; newly-detected autoionizing levels give peak ionization cross sections (inferred from saturation fluences) up to 10(-15) cm2. Members of Rydberg series converging to the 315 and 1323 cm-1 levels of Zr+ were identified. ''Clumps'' of autoionizing levels are thought to be due to Rydberg-valence mixing. RP PAGE, RH (reprint author), LAWRENCE LIVERMORE NATL LAB,AVLIS PROGRAM,POB 808,LIVERMORE,CA 94550, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 63 EP 66 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800014 ER PT J AU KOCH, JA MACGOWAN, BJ DASILVA, LB MATTHEWS, DL MROWKA, S UNDERWOOD, JH BATSON, PJ AF KOCH, JA MACGOWAN, BJ DASILVA, LB MATTHEWS, DL MROWKA, S UNDERWOOD, JH BATSON, PJ TI SELENIUM X-RAY LASER LINE-PROFILE MEASUREMENTS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SATURATION; EMISSION AB We discuss our recent measurements of the spectral width of the 206.38 angstrom laser in Ne-like Se. These measurements were performed over a wide range of amplifier lengths and indicate an intrinsic line width of 50 mA FWHM (full-width at half-maximum), show gain narrowing to 10 mA in intermediate length amplifiers and show no significant re-broadening in long, saturated amplifiers. We briefly discuss the experiments and interpretations. C1 LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP KOCH, JA (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. NR 16 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 67 EP 70 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700013 ER PT J AU KLEM, JF LOTT, JA SCHIRBER, JE KURTZ, SR AF KLEM, JF LOTT, JA SCHIRBER, JE KURTZ, SR TI STRAINED QUANTUM-WELL INGASB/ALGASB HETEROSTRUCTURES GROWN BY MOLECULAR-BEAM EPITAXY SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID FIELD-EFFECT TRANSISTOR; CHANNEL AB Strained, modulation-doped InGaSb/AlGaSb quantum wells were grown on InP substrates by molecular beam epitaxy and characterized by magneto-transport measurements. Hole transport properties were strongly correlated with growth conditions. Shubnikov-de Haas measurements yielded a hole mass of (0.15 +/- 0.02) m(O), and hole mobilities as high as 3300 cm2/Vs were obtained at 77K, with a density of 1.6 x 10(12) cm-2, thus showing promise for p-type field-effect transistor applications. RP KLEM, JF (reprint author), SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 79 EP 82 PG 4 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300014 ER PT J AU TISSUE, BM MILLER, CM FEAREY, BL AF TISSUE, BM MILLER, CM FEAREY, BL TI SATURATION BROADENING EFFECTS IN THE RESONANCE IONIZATION SPECTROSCOPY OF THORIUM SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB We describe the observation of a narrow peak superimposed on the saturation-broadened line profile in the Doppler-free spectrum of thorium. This peak was observed using counter-propagating laser beam resonant excitation of atomic thorium in cw resonance ionization mass spectrometry (RIMS). At low laser power a conventional Lamb dip was observed, however, as laser power was increased, the dip was replaced by a narrow peak. This narrow peak is attributed to a crossover peak arising from accidental degeneracies between different ac-Stark-split energy levels being simultaneously excited by the counter-propagating beam. C1 LOS ALAMOS NATL LAB,NUCL CHEM & ANAL GRP,INC-13,LOS ALAMOS,NM 87545. RP TISSUE, BM (reprint author), LOS ALAMOS NATL LAB,ISOTOPE SCI GRP,INC-6,LOS ALAMOS,NM 87545, USA. NR 11 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 95 EP 98 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800022 ER PT J AU HSUEH, SY AF HSUEH, SY TI THE FERMILAB (P)BAR ACCUMULATOR RING FOR THE CHARMONIUM EXPERIMENT SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID PSI AB This paper describes the performance of the Fermilab pBAR Accumulator for the charmonium formation experiment and the planned upgrades. We expect the total luminosity to increase by factors of 3 and 8 after the Linac upgrade and the new Main Injector respectively. RP HSUEH, SY (reprint author), FERMI NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 124 BP 105 EP 110 PG 6 WC Physics, Multidisciplinary SC Physics GA JG847 UT WOS:A1992JG84700012 ER PT J AU GARRETT, WR AF GARRETT, WR TI ALTERATIONS OF MULTIPHOTON-RESONANT PROCESSES THROUGH WAVE-MIXING EFFECTS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MULTI-PHOTON IONIZATION; 3RD-HARMONIC GENERATION; 3-PHOTON RESONANCE; SHIFTS; INTERFERENCE; SUPPRESSION; EXCITATION; EMISSION; XE AB A number of the manifestations of quantum interference effects on resonant multiphoton excitation processes are described. Examples of observions and predictions involving simple systems are summerized and discussed in the context of analytical applications. RP GARRETT, WR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 111 EP 117 PG 7 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800025 ER PT J AU BRANDON, WD ALLMAN, SL GARRETT, WR CHEN, CH PAYNE, MG PARKS, JE AF BRANDON, WD ALLMAN, SL GARRETT, WR CHEN, CH PAYNE, MG PARKS, JE TI ISOTOPE BIASES IN RIMS UTILIZING BROAD-BAND LONG-PULSED LASERS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB It has been shown (Fairbank et al 1990 and Lambropoulas et al 1990) that hyperfine structure plays a major role in producing ''anomalous'' odd to even isotope ratios in the stepwise excitation and ionization of an element with broad bandwidth lasers. This investigation is based on the suggestion (Payne et al 1991) that isotope biases may be avoided by detuning the laser from resonance by an amount greater than either the laser bandwidth or the hyperfine splitting, but less than the power broadened width. Our initial experiments have confirmed that detunings of 6 cm-1 are sufficient to eliminate these biases in the two-photon stepwise ionization by way of the P-3(0) --> P-3(1) resonance in Sn with a laser power density of 10(8) W/cm2. Also, we have seen that a 1 + 2 resonantly enhanced ionization scheme faithfully reproduces odd to even ratios, which can be attributed to beam geometry. C1 GEORGIA SO UNIV,STATESBORO,GA 30460. UNIV TENNESSEE,INST RIS,KNOXVILLE,TN 37996. RP BRANDON, WD (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. RI Allman, Steve/A-9121-2011 OI Allman, Steve/0000-0001-6538-7048 NR 3 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 119 EP 122 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800026 ER PT J AU NILSEN, J PORTER, JL DASILVA, LB MACGOWAN, BJ BEIERSDORFER, P ELLIOTT, SR YOUNG, BK AF NILSEN, J PORTER, JL DASILVA, LB MACGOWAN, BJ BEIERSDORFER, P ELLIOTT, SR YOUNG, BK TI EXPERIMENTS ON RESONANTLY PHOTOPUMPED X-RAY LASERS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID HIGHLY CHARGED IONS AB We describe our recent effort to identify and study a promising resonantly photo-pumped X-ray laser scheme. In particular we will describe a scheme which uses the strong emission lines of a nickel-like ion to resonantly photo-pump a neon-like ion and enhance the lasing of the neon-like 3p --> 3s transitions. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP NILSEN, J (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 137 EP 142 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700027 ER PT J AU WIEDMANN, RT TONKYN, RG GRANT, ER WHITE, MG AF WIEDMANN, RT TONKYN, RG GRANT, ER WHITE, MG TI PHOTOIONIZATION DYNAMICS AND CATION SPECTROSCOPY WITH COHERENT VUV RADIATION SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID ROTATIONALLY RESOLVED PHOTOIONIZATION; PHOTOELECTRON-SPECTROSCOPY; THRESHOLD PHOTOIONIZATION; FIELD-IONIZATION; H2O; SPECTRUM; ENERGY AB Pulsed field ionization (PFI) has been used in conjunction with coherent VUV radiation to investigate the rotational state distributions of molecular cations following single photon ionization. For photoionization of the H2X (X = 0, S) molecules, transitions between asymmetric top levels involving the rotational angular momentum projections, K(a) and K(c), permit resolution of the photoelectron continua according to symmetry. The observed spectra also clearly demonstrate the importance of the non-spherical nature of the molecular ion potential which leads to photoelectron final states which are unexpected from atomic-like analogies. C1 PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907. RP WIEDMANN, RT (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 161 EP 166 PG 6 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800036 ER PT J AU LIBBY, SB OSTERHELD, AL SZOKE, A WALLING, RS YOUNG, BKF AF LIBBY, SB OSTERHELD, AL SZOKE, A WALLING, RS YOUNG, BKF TI PROGRESS TOWARD X-RAY LASING BETWEEN AUTOIONIZING TRANSITIONS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID LASER-PRODUCED PLASMA; FLUORESCENCE AB We report progress on a DELTAn = 1 laser scheme between autoionizing states. Such a scheme has high quantum efficiency and it does not suffer from trapping of the resonance transition draining the lower laser level. The upper laser level is optically pumped and its Auger decay rate is slower than that of the lower laser level. We report on a study of pumping of the 1s2s3p manifold of Li - like Al, using the 1825.6 eV transition of Ne - like Rb. RP LIBBY, SB (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. NR 8 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 163 EP 166 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700033 ER PT J AU PELLIN, MJ LYKKE, KR WURZ, P PARKER, DH AF PELLIN, MJ LYKKE, KR WURZ, P PARKER, DH TI MOLECULAR-SURFACE ANALYSIS BY LASER IONIZATION OF DESORBED MOLECULES SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MASS-SPECTROMETRY; MULTIPHOTON-IONIZATION; POLYMER ADDITIVES; ULTRAVIOLET-LASER; DESORPTION; C60; ELECTRON; C70 AB While elemental analysis of surfaces has progressed dramatically over the past ten years, quantitative molecular surface analysis remains difficult. This is particularly true in the analysis of complex materials such as polymers and rubbers which contain a wide compliment of additives and pigments to enhance their material characteristics. For mass spectrometric analysis the difficulty is two fold. First, desorption of surface molecules must be accomplished with minimal fragmentation and collateral surface damage. Second, the desorbed molecules must be ionized for subsequent mass analysis with high efficiency and without significant cracking. This paper focuses on the second of these problems. C1 ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. RP PELLIN, MJ (reprint author), ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 25 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 167 EP 172 PG 6 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800037 ER PT J AU RENAUDIN, P BACK, CA CHENAISPOPOVICS, C GAUTHIER, JC AF RENAUDIN, P BACK, CA CHENAISPOPOVICS, C GAUTHIER, JC TI EXPERIMENTAL STUDIES OF THE FLUORESCENCE OF THE AL XII 1S(2)-1S2P LINE INDUCED BY A FILTERED HIGH Z X-RAY SOURCE SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SPECTRA AB Preliminary analysis of the fluorescence of the Al Healpha line photopumped by the M-band emission of tungsten is reported. The intensity emitted by the x-ray source has been measured and a time-dependent collisional-radiative model has been used with a one dimensional radiative hydrocode to simulate and optimize the experiment. The photopumping experiment has been done with multilayered targets irradiated by 0.53 mum wavelength laser beams. Non-resonant x-ray photoionization of He-like aluminum has been demonstrated with the observation of the Healpha line fluorescence. C1 ECOLE POLYTECH, LAB LULI, F-91128 PALAISEAU, FRANCE. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP RENAUDIN, P (reprint author), ECOLE POLYTECH, LAB PMI, F-91128 PALAISEAU, FRANCE. NR 7 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 167 EP 170 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700034 ER PT J AU DESAI, S FEIGERLE, CS MILLER, JC AF DESAI, S FEIGERLE, CS MILLER, JC TI NITRIC-OXIDE CONTAINING HETEROCLUSTERS PROBED BY 2-PHOTON IONIZATION IN A SUPERSONIC EXPANSION SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MULTIPHOTON IONIZATION; VANDERWAALS MOLECULES; CLUSTERS; NO; SPECTROSCOPY AB Mixed clusters of the form (NO)(m)Ar(n)(m less-than-or-equal-to 8,n less-than-or-equal-to 54) are produced in a supersonic expansion, photoionized by nonresonant absorption of 266 nm or 532 nm photons and detected by time-of-flight mass spectrometry. Anomalously large relative intensities are observed for the cluster ions NO+Ar(n)(n = 12,18,22,54) and (NO)2+Arn (n = 17,21) and are attributed to extra stability of these ions. These ''magic numbers'' at (m + n) = 13,19,23,55 are compared to those observed in rare gas clusters and other M+Ar(n) heteroclusters and assigned to icosahedral structures. Upon doping the NO/Ar expansion with small amounts of N2O, NO2, CO2, and H2O, other mixed clusters can be synthesized. Various cluster ions of the form (NO)m+ (N2O)n, (NO)m+(NO2)n, (NO)m+(H2O)n, H3O+(H2O)n, (NO)m+(CO2)n, and (NO2)m+Arn have been observed. In NO/N2O/Ar expansions the cluster ion series (NO)3+(N2O)n (n = 0-12) is considerably more abundant than clusters of N2O about nitric oxide monomers, dimers, or tetramers suggesting an unusually stable structure for the trimer ion cluster. RP DESAI, S (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 15 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 173 EP 176 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800038 ER PT J AU EDER, DC AMENDT, P BOLTON, PR GUETHLEIN, G LONDON, RA ROSEN, MD WILKS, SC AF EDER, DC AMENDT, P BOLTON, PR GUETHLEIN, G LONDON, RA ROSEN, MD WILKS, SC TI TABLE-TOP X-RAY LASING BASED ON OPTICAL-FIELD-INDUCED IONIZATION SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID POPULATION-INVERSION; PLASMAS; EXPANSION; LASERS; PULSES AB Table-top x-ray laser schemes in H- and Li-like ions following optical-field-induced ionization are discussed. The use of ultrashort (less-than-or-equal-to 100 fsec) ionizing pulses is shown to be necessary to keep secondary heating mechanisms, e.g., stimulated Raman scattering, at acceptable levels. The combination of longitudinal pumping and ultrashort pulses gives modest energy requirements (E(in) less-than-or-equal-to 0.1 J for Li-like Ne). The effects of plasma dispersion and longitudinal pumping, on the relative speeds of the ionizing laser pulse and the x-ray photons, are included in our calculations. The x-ray laser scheme is calculated to have relatively high energy efficiencies (E(out)/E(in) greater-than-or-equal-to 10(-5)) in Li-like Ne at 98 angstrom. Two approaches for creating the initial high-density gas/plasma using a laser heated thin film and a high-density gas jet are described. Applications in material science and chemistry, e.g., photoelectron spectroscopy, requiring the high-repetition rate (10 - 100 Hz) of the proposed x-ray laser are discussed. RP EDER, DC (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. NR 20 TC 0 Z9 0 U1 3 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 177 EP 184 PG 8 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700036 ER PT J AU MACEK, JH BOTERO, J AF MACEK, JH BOTERO, J TI PERTURBATION-THEORY WITH ARBITRARY BOUNDARY-CONDITIONS FOR CHARGED-PARTICLE SCATTERING - APPLICATION TO (E,2E) EXPERIMENTS IN HELIUM SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID INELASTIC-COLLISIONS; MOLECULES; ATOMS AB A new perturbation series of the distorted-wave-Born-type is developed in such a way that the slow decrease of the Coulomb potential in which the incoming and scattered particles move plays no role. We apply this approach to triple differential cross sections for electron impact ionization of Helium at low and intermediate energies, where we use Coulomb waves with an effective charge for the incoming, scattered and ejected electron, and show that even though these wave functions are known to satisfy the wrong Coulomb boundary conditions at infinity, they give reasonable and unexpectedly good agreement with experiment. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP UNIV TENNESSEE, DEPT PHYS & ASTRON, KNOXVILLE, TN 37996 USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 122 BP 181 EP 186 PG 6 WC Physics, Multidisciplinary SC Physics GA HV058 UT WOS:A1992HV05800020 ER PT J AU ASARO, F BEKOV, G BELKIN, RS GULEVICH, VM KHOMYAKOV, NG KURSKY, AN PAKHOMOV, DY AF ASARO, F BEKOV, G BELKIN, RS GULEVICH, VM KHOMYAKOV, NG KURSKY, AN PAKHOMOV, DY TI TARIS ANALYSIS IN BIOMEDICAL, ENVIRONMENTAL AND GEOCHEMICAL RESEARCHES SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID LASER PHOTOIONIZATION AB The method of Thermal Atomization of a substance in vacuum combined with Resonance Ionization Spectroscopy (TARIS) has been used for the detection of Pt traces in biological samples and for the measurement of Ru and Rh concentrations in ancient geological deposits and rock samples. C1 CENT RES INST PROSPECTING BASE & NOBLE MET, MOSCOW, RUSSIA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP ASARO, F (reprint author), RUSSIAN ACAD SCI, INST SPECTR, TROITSK 142092, RUSSIA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 205 EP 208 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800044 ER PT J AU FEAREY, BL TISSUE, BM OLIVARES, JA LOGE, GW MURRELL, MT MILLER, CM AF FEAREY, BL TISSUE, BM OLIVARES, JA LOGE, GW MURRELL, MT MILLER, CM TI HIGH-PRECISION THORIUM RIMS FOR GEOCHEMISTRY SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SYSTEMATICS AB We present recent results in the development of resonance ionization mass spectrometry (RIMS) using continuous-wave lasers to measure thorium isotope ratios of importance in geochemistry and geochronology. The ionization efficiency, precision, accuracy, and biases in Th-230/232 ratios measured by cw RIMS using broad-band and narrow-band lasers are discussed. Spectra of Th-229, which potentially can be used as an internal standard, are also presented. C1 LOS ALAMOS NATL LAB, NUCL CHEM & ANAL GRP, INC-13, LOS ALAMOS, NM 87545 USA. RP FEAREY, BL (reprint author), LOS ALAMOS NATL LAB, ISOTOPE SCI GRP, INC-6, LOS ALAMOS, NM 87545 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 209 EP 212 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800045 ER PT J AU BORISOV, AB BOROVSKIY, AV SHIRYAEV, OB KARPOV, VB KOROBKIN, VV PROKHOROV, AM SOLEM, JC MCPHERSON, A SHI, X LUK, TS BOYER, K RHODES, CK AF BORISOV, AB BOROVSKIY, AV SHIRYAEV, OB KARPOV, VB KOROBKIN, VV PROKHOROV, AM SOLEM, JC MCPHERSON, A SHI, X LUK, TS BOYER, K RHODES, CK TI INVESTIGATION OF RELATIVISTIC AND CHARGE-DISPLACEMENT SELF-CHANNELING OF INTENSE SUBPICOSECOND ULTRAVIOLET (248 NM) RADIATION IN PLASMAS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID X-RAY AMPLIFICATION; LASER-PULSES; TUNNELING IONIZATION; FIELD AB Experimental studies examining a new relativistic regime of high-intensity short-pulse propagation in plasmas have been performed which present evidence for the formation of a stable mode of spatially confined (channeled) propagation. For an electron density of approximately 1.35 X 10(21) cm-3 and a power of (4 +/-1) x 10(11) W, the results indicate a channel radius < 1 mum and a peak intensity in the channel of approximately 10(19) W/cm2. Comparison of these findings with a dynamical theory yields agreement for both the longitudinal structure and the radial extent of the propagating channel observed. Strong x-ray emission in the kilovolt spectral range correlated with the channel formation was also detected. C1 RUSSIAN ACAD SCI, INST GEN PHYS, MOSCOW 117942, RUSSIA. LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. UNIV ILLINOIS, DEPT PHYS, CHICAGO, IL 60680 USA. RP BORISOV, AB (reprint author), MOSCOW MV LOMONOSOV STATE UNIV, CTR RES COMP, COMP SIMULAT LAB, MOSCOW 119899, RUSSIA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 229 EP 238 PG 10 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700046 ER PT J AU AMENDT, P LONDON, RA STRAUSS, M AF AMENDT, P LONDON, RA STRAUSS, M TI OPTIMIZATION STUDY OF X-RAY LASER COHERENCE IN NI-LIKE TA SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID OPTICS AB By separately employing a wave optics treatment based on a modal expansion of the laser electric field and ray optics methods, criteria are proposed which serve to optimize transverse coherence. Refraction is shown to increase the saturation gain-length of the laser, thereby enabling a higher coherent energy output. Under optimum conditions the calculated output for a single-stage Ni-like Ta x-ray laser of nearly one mJ in 100 psec may be satisfactory for 300 angstrom resolution holographic imaging of biological specimens. C1 NUCL RES CTR NEGEV, DEPT PHYS, IL-84190 BEER SHEVA, ISRAEL. RP AMENDT, P (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 12 TC 0 Z9 0 U1 2 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 255 EP 260 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700051 ER PT J AU LONDON, RA AMENDT, P STRAUSS, M AF LONDON, RA AMENDT, P STRAUSS, M TI GEOMETRIC OPTICS SCALING LAWS FOR X-RAY LASER COHERENCE SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB Analytic scaling laws for the coherence length and coherent power of simple parabolic profile x-ray lasers are derived and applied to estimate the maximum coherent power at saturation 'and the configuration of such a laser. Approximately 1 mJ of coherent energy at 45 angstrom can be extracted from an ideal single stage laser at saturation, providing an adequate source for application to x-ray holograpby of biological samples C1 NUCL RES CTR NEGEV, BEER SHEVA, ISRAEL. RP LONDON, RA (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 13 TC 0 Z9 0 U1 2 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 261 EP 264 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700052 ER PT J AU TREBES, J AF TREBES, J TI SPATIAL COHERENCE OF SOFT-X-RAY LASERS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article RP TREBES, J (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 265 EP 268 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700053 ER PT J AU MACGOWAN, BJ MROWKA, S BARBEE, TW DASILVA, LB EDER, DC KOCH, JA UNDERWOOD, JH AF MACGOWAN, BJ MROWKA, S BARBEE, TW DASILVA, LB EDER, DC KOCH, JA UNDERWOOD, JH TI PROBLEMS IN THE IMPLEMENTATION OF X-RAY OPTICS WITH X-RAY LASERS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SPECTROGRAPH; EXPANSION; CARBON AB When using multilayer mirrors in x-ray laser cavities, damage from intense optical and x-ray pulses, is a major problem. X-ray damage to WC/C and Cr3C2/C multilayer mirrors has been studied using short pulses (500 psec) of soft x-rays from a laser produced plasma. The effect of damage on the mirror reflectivity and position and shape of the bandpass were resolved temporally and spectrally. Simulations of the behavior of the mirrors are found to be broadly consistent with the observed damage thresholds. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP MACGOWAN, BJ (reprint author), LAWRENCE LIVERMORE NATL LAB, L-476,POB 808, LIVERMORE, CA 94550 USA. NR 13 TC 0 Z9 0 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 269 EP 274 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700054 ER PT J AU CALAWAY, WF COON, SR PELLIN, MJ YOUNG, CE WHITTEN, JE WIENS, RC GRUEN, DM STINGEDER, G PENKA, V GRASSERBAUER, M BURNETT, DS AF CALAWAY, WF COON, SR PELLIN, MJ YOUNG, CE WHITTEN, JE WIENS, RC GRUEN, DM STINGEDER, G PENKA, V GRASSERBAUER, M BURNETT, DS TI RESONANCE IONIZATION OF SPUTTERED ATOMS - PROGRESS TOWARD A QUANTITATIVE TECHNIQUE SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB The combination of RIMS and ion sputtering has been heralded as the ideal means of quantitatively probing the surface of a solid. While several laboratories have demonstrated the extreme sensitivity of combining RIMS with sputtering, less effort has been devoted to the question of accuracy. Using the SARISA instrument developed at Argonne National Laboratory, a number of well-characterized metallic samples have been analyzed. Results from these determinations have been compared with data obtained by several other analytical methods. One significant finding is that impurity measurements down to ppb levels in metal matrices can be made quantitative by employing polycrystalline metal foils as calibration standards. This discovery substantially reduces the effort required for quantitative analysis since a single standard can be used for determining concentrations spanning nine orders of magnitude. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. CALTECH,ARTHUR AMOS NOYES LAB CHEM PHYS,DIV GEOL & PLANETARY SCI,PASADENA,CA 91125. SIEMENS AG,MUNICH,GERMANY. UNIV TEXAS,DEPT CHEM,AUSTIN,TX 78712. VIENNA TECH UNIV,DIV GEOL & PLANETARY SCI,A-1040 VIENNA,AUSTRIA. VIENNA TECH UNIV,INST ANALYT CHEM,A-1040 VIENNA,AUSTRIA. RP CALAWAY, WF (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 8 TC 0 Z9 0 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 271 EP 274 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800058 ER PT J AU WOLFORD, DJ GILLILAND, GD KUECH, TF BRADLEY, JA HJALMARSON, HP AF WOLFORD, DJ GILLILAND, GD KUECH, TF BRADLEY, JA HJALMARSON, HP TI OPTICALLY DETERMINED LOW-TEMPERATURE, HIGH-MOBILITY TRANSPORT IN INTERFACE-FREE GAAS HETEROSTRUCTURES SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MODULATION-DOPED HETEROSTRUCTURES; ELECTRON-MOBILITY; SCATTERING; DIFFUSION AB At low temperatures free electrons and holes condense into free excitons, which are electrically neutral. and are thus unobservable in conventional, electrical transport measurements. To study the physical limitations of low-temperature, high-mobility transport we have resorted to a new all-optical, time-resolved photoluminescence (PL) confocal imaging technique which is sensitive to both charged and neutral-particle transport. We have thus measured spatial transport of spectrally-resolved free-excitonic species at low-temperatures (1.8 - 50 K) in a series of high-quality MOCVD-prepared GaAs/Al0.3Ga0.7As double heterostructures. with varying GaAs layer thicknesses (10-mu-m to 50 angstrom). We find such constants to be sensitive to, and monotonic in, laser power - with 1.8-K peak diffusion constants of > 1000 cm2/s and minimums of almost-equal-to 1 cm2/s. We find that this anomalous transport results from the joint diffusion of free excitons and free carriers coupled through temperature-dependent capture and ionization. We conclude that the high-mobilities for joint neutral-particle (excitonic) and free carrier (electron and/or hole) transport are the result of diminished charged-center scattering and the simulation of modulation-doping which photoexcitation creates in the screening of charged centers - and are thus limited by only by intrinsic lattice (deformation potential) scattering. C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RP WOLFORD, DJ (reprint author), IBM CORP, DIV RES, TJ WATSON RES CTR, YORKTOWN HTS, NY 10598 USA. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 271 EP 274 PG 4 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300054 ER PT J AU TANG, K ALLMAN, SL CHEN, CH AF TANG, K ALLMAN, SL CHEN, CH TI LASER MASS-SPECTROMETRY FOR BIOPOLYMERS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MOLECULAR-WEIGHT; MATRIX; DESORPTION AB Various matrix materials were used for laser desorption of biological molecules which include large polypeptides and deoxyadenosine oligonucleotides. Both matrix assisted laser desorption ionization (MALDI) and matrix assisted desorption with post-ionization (MADPI) have been used. Detection sensitivity of a few femtomole of both oligomer and protein has been achieved. Both positive and negative ions were observed with little fragmentation. RP TANG, K (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. RI Allman, Steve/A-9121-2011; Tang, Kai/A-2194-2011 OI Allman, Steve/0000-0001-6538-7048; NR 6 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 289 EP 292 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800063 ER PT J AU ANDERSON, JE PEREZLOPEZ, BL NOGAR, NS ESTLER, RC CONIA, JE AF ANDERSON, JE PEREZLOPEZ, BL NOGAR, NS ESTLER, RC CONIA, JE TI RESONANCE IONIZATION MASS-SPECTROMETRY IN BIOCHEMICAL-ANALYSIS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SPECTROSCOPY C1 FT LEWIS COLL,DEPT CHEM,DURANGO,CO. CELL ROBOT,ALBUQUERQUE,NM 87106. RP ANDERSON, JE (reprint author), LOS ALAMOS NATL LAB,MS J565,LOS ALAMOS,NM 87545, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 293 EP 296 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800064 ER PT J AU WAN, AS WALLING, RS SCOTT, HA MAYLE, RW OSTERHELD, AL AF WAN, AS WALLING, RS SCOTT, HA MAYLE, RW OSTERHELD, AL TI SELF-CONSISTENT ONE-DIMENSIONAL MODELING OF X-RAY LASER PLASMAS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MEDIA AB This paper presents the simulation of a planar, one-dimensional expanding Ge x-ray laser plasma using a new code which combines hydrodynamics, laser absorption, and detailed level population calculations within the same simulation. Previously, these simulations were performed in separate steps. We will present the effect of line transfer on gains and excited level populations and compare the line transfer result with simulations using escape probabilities. We will also discuss the impact of different atomic models on the accuracy of our simulation. RP WAN, AS (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 293 EP 296 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700058 ER PT J AU CLARKE, R DOSPASSOS, W LOWE, W MACHARRIE, RA BRIZARD, C RODRICKS, B AF CLARKE, R DOSPASSOS, W LOWE, W MACHARRIE, RA BRIZARD, C RODRICKS, B TI CCD PIXEL ARRAY DETECTORS FOR SYNCHROTRON RADIATION APPLICATIONS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB The application of a virtual phase CCD detector for x-ray synchrotron radiation experiments is described. Performance characteristics such as high dynamic range, versatile readout and data storage modes, and time-resolved capabilities, promise interesting possibilities for experiments on high-brilliance sources. The operation of CCDs as high-resolution position-sensitive detectors, used in conjunction with dispersive optics, is illustrated by recent results on transient structural changes occurring during the thermal processing of electronic materials. The CCD detector has been operated successfully under direct exposure to 8 keV x-rays. We discuss issues of radiation hardness in this context. C1 AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. ARGONNE NATL LAB, ADV PHOTON SOURCE, ARGONNE, IL 60439 USA. RP CLARKE, R (reprint author), UNIV MICHIGAN, RANDALL LAB PHYS, ANN ARBOR, MI 48109 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 121 BP 297 EP 304 PG 8 WC Physics, Multidisciplinary SC Physics GA HV057 UT WOS:A1992HV05700037 ER PT J AU SHAW, RW YOUNG, JP RAMSEY, JM AF SHAW, RW YOUNG, JP RAMSEY, JM TI RESONANCE IONIZATION OF RUBIDIUM USING SEQUENTIAL DIODE LASER-DRIVEN TRANSITIONS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SPECTROSCOPY; LANTHANUM AB Diode laser excitation of rubidium atoms at the D2 line followed by [1 + 1] ionization using a pulsed dye laser was examined. Mass-resolved D2 spectra were recorded for both natural isotopes. Excitation using two sequential diode laser photons was accomplished by counterpropagating the beam from the 780 nm laser and one from a 775.8 nm laser; the latter excites Rb from the P-5(3/2) level to the 5D5/2 level at 25704 cm-1. A photon from the R6G laser then ionized the atom. Spectra resulting from scanning the second diode laser -- with the rust at an off-resonance fixed frequency -- revealed both two-photon and sequential [1 + 1] processes. RP SHAW, RW (reprint author), OAK RIDGE NATL LAB,DIV ANALYT CHEM,POB 2008,OAK RIDGE,TN 37831, USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 297 EP 300 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800065 ER PT J AU OSTERHELD, AL YOUNG, BKF WALLING, RS GOLDSTEIN, WH SCOFIELD, JH CHEN, M SHIMKAVEG, G CARTER, M SHEPHERD, R MACGOWAN, BJ DASILVA, L MATTHEWS, D MAXON, S LONDON, R STEWART, RE AF OSTERHELD, AL YOUNG, BKF WALLING, RS GOLDSTEIN, WH SCOFIELD, JH CHEN, M SHIMKAVEG, G CARTER, M SHEPHERD, R MACGOWAN, BJ DASILVA, L MATTHEWS, D MAXON, S LONDON, R STEWART, RE TI ATOMIC PHYSICS MODELING OF X-RAY LASER PLASMAS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID IONIZATION; SELENIUM; IONS AB We have developed collisional-radiative models to describe the kinetics of x-ray laser plasmas. Careful attention has been paid to indirect processes such as dielectronic recombination and excitation-autoionization. These models can be used for calculations of the ionization dynamics, gain coefficients, and detailed emission spectra. We will present results from ionization balance and gain calculations for neonlike and nickellike collisional lasing schemes, emphasizing the effects of different atomic physics processes and model approximations. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP OSTERHELD, AL (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 19 TC 0 Z9 0 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 309 EP 314 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700062 ER PT J AU RATOWSKY, RP CRAXTON, RS FEIT, MD LONDON, RA WALLING, RS SHIMKAVEG, GM OSTERHELD, AL CARTER, MR AF RATOWSKY, RP CRAXTON, RS FEIT, MD LONDON, RA WALLING, RS SHIMKAVEG, GM OSTERHELD, AL CARTER, MR TI 3-DIMENSIONAL TIME-DEPENDENT HYDRODYNAMIC AND PROPAGATION MODELING OF X-RAY LASER-EMISSION SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB We have carried out three dimensional time-dependent calculations of x-ray emission in exploding foil line focus produced plasmas relevant to neon-like yttrium experiments at the Lawrence Livermore National Laboratory (LLNL). Hydrodynamic simulations using LASNEX and a simple gain profile based on XRASER are input into CASER, which solves the radiation transport equation along three dimensional ray orbits. Experimental observables such as farfield patterns and x-ray signal vs. laser length are then computed and compared with experiment. Similar two dimensional calculations have also been performed using the wave optics code WAVE to calculate coherence and confirm the accuracy of the ray optics treatment. We have found good agreement between both experiment and simulation and between the ray and wave optics codes. C1 UNIV ROCHESTER, LASER ENERGET LAB, ROCHESTER, NY 14623 USA. RP RATOWSKY, RP (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RI Feit, Michael/A-4480-2009 NR 6 TC 0 Z9 0 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 315 EP 318 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700063 ER PT J AU BENCK, EC SCHUESSLER, HA BUCHINGER, F CARTER, K AF BENCK, EC SCHUESSLER, HA BUCHINGER, F CARTER, K TI DETECTION OF RARE ISOTOPES BY COLLINEAR-FAST-BEAM PHOTON-BURST SPECTROSCOPY SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID LASER AB An experiment is presently being set up which uses collinear-fast-beam laser spectroscopy with photon-burst detection. The large artificial kinetic isotope shift characteristic of an accelerated beam, together with the Doppler-free linewidth of the fluorescence from the practically mono-kinetic fast atoms, lead to a selectivity against neighboring isotopes exceeding parts in 10(9). In addition, photon-burst detection based on photon correlations in the resonance fluorescence is employed to increase the sensitivity. The sensitivity is expected to reach the few ten atom/s level. The technique is being tested using a 10 to 50 KeV beam of krypton atoms and light from a single mode Ti-Sapphire laser at lambda=811 nm. C1 OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37830. MCGILL UNIV,FOSTER RADIAT LAB,MONTREAL H3A 2B2,QUEBEC,CANADA. RP BENCK, EC (reprint author), TEXAS A&M UNIV SYST,DEPT PHYS,COLL STN,TX 77843, USA. NR 7 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 329 EP 332 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800073 ER PT J AU ALEXANDER, ML CISPER, ME HEMBERGER, PH NOGAR, NS WILLIAMS, JD SYKA, JEP AF ALEXANDER, ML CISPER, ME HEMBERGER, PH NOGAR, NS WILLIAMS, JD SYKA, JEP TI LASER-BASED STUDIES WITH AN ION-TRAP MASS-SPECTROMETER - ION TOMOGRAPHY AND ANALYTICAL APPLICATIONS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article C1 PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907. FINNIGAN MAT CORP,SAN JOSE,CA 95134. RP ALEXANDER, ML (reprint author), LOS ALAMOS NATL LAB,MS 1565,LOS ALAMOS,NM 87545, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 337 EP 341 PG 5 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800075 ER PT J AU YOUNG, BKF OSTERHELD, AL SHIMKAVEG, GM WALLING, RS SHEPHERD, RL GOLDSTEIN, WH DASILVA, LB PORTER, JL STEWART, RE AF YOUNG, BKF OSTERHELD, AL SHIMKAVEG, GM WALLING, RS SHEPHERD, RL GOLDSTEIN, WH DASILVA, LB PORTER, JL STEWART, RE TI ELECTRON-TEMPERATURE MEASUREMENTS OF X-RAY LASER PLASMAS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB We present results of recent experiments at the NOVA laser to measure the electron temperature of neon-like yttrium X-ray laser plasmas. Trace amounts of aluminum were introduced into yttrium exploding-foil targets. Time resolved electron temperatures were determined by comparing the measured aluminum K-shell spectra with detailed quasi-steady state calculations and are compared to 2D LASNEX hydrodynamics simulations. RP YOUNG, BKF (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. NR 11 TC 0 Z9 0 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 343 EP 346 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700069 ER PT J AU DUNN, J LAFONTAINE, B BALDIS, HA ENRIGHT, GD VILLENEUVE, DM KIEFFER, JC NANTEL, M PEPIN, H AF DUNN, J LAFONTAINE, B BALDIS, HA ENRIGHT, GD VILLENEUVE, DM KIEFFER, JC NANTEL, M PEPIN, H TI CHARACTERIZATION OF A LINE FOCUS X-RAY LASER GERMANIUM PLASMA SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID SPECTROSCOPY AB A laser produced plasma from a short line focus 150 mum x 1.5mm (FWHM) germanium slab target is studied. Non-uniform irradiance conditions of 0.7-5x10(13) Wcm-2, 1omega, 2ns (FWHM Gaussian) are chosen. Space- and time-resolved measurements of T(e) using UV Thomson scattering are complemented by spatially resolved L-shell x-ray spectroscopy. The inhomogeneity along the line focus is monitored by x-ray imaging and UV interferometry. Good agreement is observed between the electron temperature deduced from Thomson scattering and that from a partial-LTE model applied to optically thin n=4-2 fluorinelike to neonlike line ratios. The spatial variation of T(e) along the line focus is found to vary between 250eV and 550eV (+/- 25%) following the observed x-ray emission pattern from the imaging diagnostics. Consequences of the spatial and temporal variation of T(e) are discussed. C1 INRS, VARENNES J3X 1S2, PQ, CANADA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP DUNN, J (reprint author), NATL RES COUNCIL CANADA, OTTAWA K1A 0R6, ONTARIO, CANADA. RI Villeneuve, David/I-4140-2012 OI Villeneuve, David/0000-0002-2810-3648 NR 22 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 347 EP 352 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700070 ER PT J AU YOUNG, JP SHAW, RW AF YOUNG, JP SHAW, RW TI A MINIATURE CARBON FURNACE FOR MASS-SPECTROMETRY SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB A miniature carbon (graphite)- disposable tube furnace has been designed and built for use in RIMS. This furnace is an excellent source for generating atoms to be subsequently ionized by optical or thermal means. The complete furnace assembly is very small, less than 4 cm2. Electrical connections to the carbon are simple, and no water cooling is required. RP YOUNG, JP (reprint author), OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831, USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP 347 EP 350 PG 4 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800077 ER PT J AU LOVEJOY, ML MELLOCH, MR LUNDSTROM, MS KEYES, BM AHRENKIEL, RK AF LOVEJOY, ML MELLOCH, MR LUNDSTROM, MS KEYES, BM AHRENKIEL, RK TI MEASUREMENT OF MINORITY HOLE ZERO-FIELD DIFFUSIVITY IN N+-GAAS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB Minority hole diffusivity, or equivalently the hole mobility, was measured in n+-GaAs with the zero-field time-of-flight technique. Devices for this study were fabricated on MBE grown films, and effects such as enhanced transport due to photon recycling and circuit effects were minimized with the device design. For a donor doping of 1.8 x 10(18) cm-3, the minority hole diffusivity was found to be 5.8 cm2/s, which corresponds to a mobility of approximately 225 cm2/V.s; this is greater than the majority carrier mobility for comparably doped p-GaAs. This result for hole mobility has important implications for the design of devices such as pnp-HBT's. C1 SOLAR ENERGY RES INST, GOLDEN, CO 80401 USA. RP LOVEJOY, ML (reprint author), PURDUE UNIV, W LAFAYETTE, IN 47907 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 359 EP 363 PG 5 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300069 ER PT J AU CHUNG, SU AF CHUNG, SU TI CURRENT STATUS OF THE E(1420)/L(1440) AND FUTURE-PROSPECTS OF THE GT DECAYING INTO PHI-PHI SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID HERMAPHRODITE BARYONS; MESONS; GEV/C; MODEL AB A survey is given of the current status of the f1(1420)/E and the eta(1440)/iota in the channels KKpiBAR and eta-pi-pi. There is now strong evidence that the eta(1440)/iota is split into two J(PC) = 0-+ states in the 1.4-1.5 GeV range with the lower-mass state coupling mostly to a0(980)pi whereas the upper-mass state couples mainly to K*(890)KBAR. Both of them cannot be quarkonia. It appears very likely that the f1(1420)/E is an S-wave K*(890)KBAR molecule with a strong overlap with the a0(980)/delta. It is thought that one or more of the J(PC) = 2++ f2(2010)/g(T), f2(2300)/g(T)', and f2(2340)/g(T)" states decaying into phi-phi may be the tensor glueball. The future prospects at BNL and elsewhere for further experimental work on these and other exotic states coupling to phi-phi are discussed. RP CHUNG, SU (reprint author), BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 124 BP 373 EP 383 PG 11 WC Physics, Multidisciplinary SC Physics GA JG847 UT WOS:A1992JG84700044 ER PT J AU FRIEDMAN, DJ KIBBLER, AE OLSON, JM AF FRIEDMAN, DJ KIBBLER, AE OLSON, JM TI TEMPERATURE-DEPENDENT ELECTRON-MOBILITY AND CLUSTERING IN GAINP2 SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID IN1-XGAXASYP1-Y; GA0.5IN0.5P; PARAMETERS; SCATTERING; TRANSPORT AB We present temperature-dependent Hall mobility data mu-(T) for GaInP2, an alloy which shows cation-site ordering under certain growth conditions. We find that samples grown to give high ordering have consistently lower mobilities than samples with low ordering, suggesting that the mobility is limited by cluster scattering by ordered domains. By analyzing mu-(T) in terms of a cluster scattering model developed by Harrison, Hauser, and Marsh, we quantify the difference in clustering between the more- and less-ordered states of GaInP2. RP FRIEDMAN, DJ (reprint author), SOLAR ENERGY RES INST, 1617 COLE BLVD, GOLDEN, CO 80401 USA. NR 20 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 383 EP 388 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300073 ER PT J AU DASILVA, LB TREBES, JE MROWKA, S MACGOWAN, BJ KOCH, JA MATTHEWS, DL BARBEE, TW BALHORN, R GRAY, J ANDERSON, E KERN, D ATTWOOD, D AF DASILVA, LB TREBES, JE MROWKA, S MACGOWAN, BJ KOCH, JA MATTHEWS, DL BARBEE, TW BALHORN, R GRAY, J ANDERSON, E KERN, D ATTWOOD, D TI PROGRESS IN IMAGING MICROSCOPY WITH X-RAY LASERS AT LLNL SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID CARBON K-EDGE AB Imaging microscopy with short pulse (200 ps) x-ray lasers offers the opportunity of high resolution three-dimensional imaging of specimens in an aqueous environment without the blurring effects associated with natural motion and radiation induced chemical decomposition. As a first step towards this goal we have performed imaging experiments with the Ni-like Ta x-rav laser (lambda = 44.83 angstrom) which have clearly resolved 500 angstrom features on a gold test pattern. In addition, we have ta-ken images of gold labeled dried rat sperm as a basis for comparison in future wet specimen imaging. The results of these experiments are described. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP DASILVA, LB (reprint author), LAWRENCE LIVERMORE NATL LAB, L-483,POB 808, LIVERMORE, CA 94550 USA. NR 6 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 387 EP 392 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700079 ER PT J AU WOLFORD, DJ GILLILAND, GD KUECH, TF MARTINSEN, J BRADLEY, JA TSANG, CF VENKATASUBRAMANIAN, R GHANDHI, SK HJALMARSON, HP KLEM, J AF WOLFORD, DJ GILLILAND, GD KUECH, TF MARTINSEN, J BRADLEY, JA TSANG, CF VENKATASUBRAMANIAN, R GHANDHI, SK HJALMARSON, HP KLEM, J TI INTERFACE-FREE GAAS STRUCTURES - FROM BULK TO THE QUANTUM LIMIT SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID MINORITY-CARRIER LIFETIME; SURFACE-FREE GAAS; PHOTOLUMINESCENCE; RECOMBINATION; PASSIVATION; EPITAXY; HOMOSTRUCTURES; ABSORPTION AB We have studied, through extensive transient PL (1.8 - 300 K) measurements, intrinsic recombination in "ideal" GaAS structures, passivated by state-of-the-art "surface barriers." Lifetime versus GaAs thickness (10-mu-m - 0.01 gm) yields the lowest interface recombination velocities yet reported of less-than-or-equal-to 40 cm/s for MOCVD-prepared GaAs/AIO.3Gao.7As double heterostructures and approximately 60 to 5500 cm/s for MOCVD-prepared all-GaAs n+/n-/n+ homostructures. In comparison, Na2S passivation gives approximately 5500 cm/s, and bare GaAs surfaces yield greater-than-or-equal-to 34,000 cm/s. Further, identical measurements made in comparably MBE-prepared GaAs/Al0.3Gao.7As double heterostructures suggest corresponding interface recombination velocities of approximately 250 to 5000 cm/s. Thus, we prove - from bulk to quantum wells - that "interface-free" GaAs structures are now achievable, and that intrinsic band-to-band and/or free exciton recombination may dominate in such structures. C1 RENSSELAER POLYTECH INST, TROY, NY 12180 USA. SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RP WOLFORD, DJ (reprint author), IBM CORP, THOMAS J WATSON RES CTR, DIV RES, YORKTOWN HTS, NY 10598 USA. NR 18 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 401 EP 406 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300076 ER PT J AU JONES, ED LYO, SK KLEM, JF SCHIRBER, JE LIN, SY AF JONES, ED LYO, SK KLEM, JF SCHIRBER, JE LIN, SY TI GROUND-STATE INPLANE LIGHT-HOLES IN GAAS/ALGAAS STRUCTURES SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB We have performed low-temperature magnetoluminescence, far-infrared cyclotron resonance, and magneto-transport measurements on narrow (4.5 nm) GaAs/Al0.25Ga0.75As single quantum-wells. The ground-state in-plane valence band was found to be light and nonparabolic, i.e., at zone center, the valence band mass is m(V) almost-equal-to 0.1m0 and for Fermi energies E(f) almost-equal-to 10 meV, m(V) almost-equal-to 0.25m0. C1 PRINCETON UNIV, DEPT ELECT ENGN, PRINCETON, NJ 08544 USA. RP JONES, ED (reprint author), SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 407 EP 412 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300077 ER PT J AU LOPEZURRUTIA, JRC FILL, EE BRUCH, R SCHNEIDER, D AF LOPEZURRUTIA, JRC FILL, EE BRUCH, R SCHNEIDER, D TI LASER-PLASMA ION-BEAMS - EXPERIMENTS TOWARDS CHARGE-TRANSFER X-RAY LASERS SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article AB Laser plasmas produced at intensities of up to 10(14) W/cm2 expand towards a secondary target a few millimeters away. The intense x-rav emission during the interaction plasma-target was recorded spectrally, spatially and time-resolved. A number of processes, like recombination and charge transfer may account for this strong radiation. The implications of these experiments to the design of a charge transfer x-ray laser are discussed. C1 UNIV NEVADA, RENO, NV 89557 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP LOPEZURRUTIA, JRC (reprint author), MAX PLANCK INST QUANTUM OPT, W-8046 GARCHING, GERMANY. RI Crespo Lopez-Urrutia, Jose R./F-7069-2011 OI Crespo Lopez-Urrutia, Jose R./0000-0002-2937-8037 NR 4 TC 0 Z9 0 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 407 EP 410 PG 4 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700083 ER PT J AU DOVER, CB AF DOVER, CB TI PHYSICS AT SUPERLEAR - WORKSHOP SUMMARY SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID 4 GEV/C; ANTIPROTON ANNIHILATION; QQBARG HYBRID; QUARK-MODEL; STRANGENESS; NUCLEI; MESONS; COLLISIONS; STATES; CHROMODYNAMICS AB The major themes of the physics program to be explored at the proposed SuperLEAR facility are summarized. These include the study of charmonium spectroscopy, searches for CP violation in hyperon decays, exploration of hadron spectroscopy and gluon dynamics, particularly of non-QQBAR systems, and pBAR-nucleus annihilation as a means of probing the mechanisms of charm and strangeness production as well as the dynamics of heated nuclear matter. RP DOVER, CB (reprint author), BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. NR 40 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 124 BP 421 EP 438 PG 18 WC Physics, Multidisciplinary SC Physics GA JG847 UT WOS:A1992JG84700049 ER PT J AU VALEO, EJ COWLEY, SC KRUSHELNICK, K TIGHE, W SUCKEWER, S AF VALEO, EJ COWLEY, SC KRUSHELNICK, K TIGHE, W SUCKEWER, S TI A MICROSPHERE-BASED X-RAY LASER SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID PLASMA AB We present a method for obtaining very short wavelengths (10 - 40 angstrom) in recombination lasers. The rapid cooling rates necessary to achieve population inversion during recombination are attained by adiabatic expansion of sub-micron spheres. The lasing volume, defined by the focal region of a powerful sub-picosecond pump laser, contains many such spheres. Conditions on the spheres and the pump laser which maximize gain for the H(alpha) transition of hydrogen-like ions with 10 < Z < 30 are presented. The method demands stringent control of prepulse level in the pump beam. Suppresion techniques are proposed. RP VALEO, EJ (reprint author), PRINCETON PLASMA PHYS LAB, POB 451, PRINCETON, NJ 08543 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 125 BP 433 EP 438 PG 6 WC Physics, Multidisciplinary SC Physics GA MJ527 UT WOS:A1992MJ52700089 ER PT J AU VERNON, SM HAVEN, VE MASTROVITO, AL SANFACON, MM SEKULAMOISE, PA RAMDANI, J ALJASSIM, MM AF VERNON, SM HAVEN, VE MASTROVITO, AL SANFACON, MM SEKULAMOISE, PA RAMDANI, J ALJASSIM, MM TI MOCVD GROWTH OF HIGH-QUALITY DELTA-DOPED ALXGA1-XAS-GAAS STRUCTURES SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; GAAS AB Metalorganic chemical vapor deposition has been used to form Si delta-doped structures of GaAs-AlxGa1-xAs, which have been characterized by mobility and sheet-carrier density measurements. At 20 K, mobility values of up to 300,000 cm2/V-sec, with carrier densities of almost-equal-to 1 x 10(12) cm-2, are reported. The mobility at 77 K is 131,000 cm2/V-sec. The Si delta-doped region has been imaged by cross-sectional transmission electron microscopy, and is seen to have a width of approximately 30 angstrom. Si delta doping in AlxGa1-xAs (x = 0.23) has also resulted in high carrier levels. with an unexplained amphoteric behavior having been observed. C1 N CAROLINA STATE UNIV, DEPT ECE, RALEIGH, NC 27695 USA. SOLAR ENERGY RES INST, GOLDEN, CO 80401 USA. RP VERNON, SM (reprint author), SPIRE CORP, BEDFORD, MA 01730 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 571 EP 576 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300105 ER PT J AU LYO, SK JONES, ED AF LYO, SK JONES, ED TI VALENCE-BAND ENERGY DISPERSION IN MODULATION-DOPED QUANTUM-WELLS - EFFECT OF STRAIN AND CONFINEMENT ON HEAVY-HOLE AND LIGHT-HOLE MIXING SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID HETEROJUNCTIONS AB We present theory and data for the valence-band structure for lattice-matched, strained, symmetrically- and asymmetrically-doped quantum wells (QW's). Our self-consistent k.p calculation using a plane-wave basis (PWB) yields accurate results and can be applied to arbitrary potential profiles. The PWB is convenient for shallow as well as type II QW's (with the light-hole QW inverted due to strain). Excellent agreement is obtained between the theoretical dispersion curves and the data. RP LYO, SK (reprint author), SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 583 EP 588 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300107 ER PT J AU SCHOENLEIN, RW SHANK, CV PETEANU, LA MATHIES, RA AF SCHOENLEIN, RW SHANK, CV PETEANU, LA MATHIES, RA TI FEMTOSECOND PHOTOISOMERIZATION OF RHODOPSIN AS THE PRIMARY EVENT IN VISION SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID PICOSECOND LASER PHOTOLYSIS; CIS-TRANS ISOMERIZATION; RETINAL CHROMOPHORE; ROOM-TEMPERATURE; BATHORHODOPSIN; DYNAMICS; BACTERIORHODOPSIN; PHOTORHODOPSIN; PULSES AB The primary event in vision, the cis-trans isomerization of rhodopsin, is resolved with the use of femtosecond optical measurement techniques. Tle 11-cis retinal prosthetic group of rhodopsin is excited with a 35 fs pump pulse at 500 nm, and the transient changes in absorption are measured between 450 and 580 nm with a 10 fs probe pulse. Within 200 fs, an increased absorption is observed between 540 and 580 nm, indicating the formation of photoproduct on this time scale. These measurements demonstrate that the first step in vision, the cis --> trans torsional isomerization of the rhodopsin chromophore, is essentially complete in only 200 fs. C1 UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. RP LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RI Schoenlein, Robert/D-1301-2014 OI Schoenlein, Robert/0000-0002-6066-7566 NR 19 TC 0 Z9 0 U1 2 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 126 BP 583 EP 588 PG 6 WC Physics, Multidisciplinary SC Physics GA JQ130 UT WOS:A1992JQ13000131 ER PT J AU CHENG, KY HSIEH, KC BAILLARGEON, JN MASCARENHAS, A AF CHENG, KY HSIEH, KC BAILLARGEON, JN MASCARENHAS, A TI FORMATION OF LATERAL QUANTUM-WELLS IN VERTICAL SHORT-PERIOD SUPERLATTICES SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID LASERS; GAP AB Lateral quantum well (QW) structures with periodicities as small as approximately 200 angstrom were formed in vertical (GaAs)n/(InAs)n and (GaP)n/(InP)n short-period-superlattices (SPS) grown on nominally (100) InP and GaAs substrates using solid and gas source molecular beam epitaxy techniques, respectively. Both InGaAs and InGaP ordered vertical superlattice layers were found to have a growth-induced lateral periodic modulation of the composition along the [110BAR] direction and form parabolic-shaped lateral QWs. When the InGaP QW structure was excited with laser light along [110] and [110BAR] directions, strong anisotropy was observed in the intensity ratio of the electron-to-light-hole and electron-to-heavy-hole transitions. This measurement confirms the existence of lateral two-dimensional quantum confinement in vertical SPS structures. C1 UNIV ILLINOIS, CTR COMPOUND SEMICOND MICROELECTR, URBANA, IL 61801 USA. SOLAR ENERGY RES INST, GOLDEN, CO 80401 USA. RP CHENG, KY (reprint author), UNIV ILLINOIS, DEPT ELECT & COMP ENGN, URBANA, IL 61801 USA. NR 9 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 589 EP 594 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300108 ER PT J AU KURTZ, SR BIEFELD, RM DAWSON, LR DOYLE, BL AF KURTZ, SR BIEFELD, RM DAWSON, LR DOYLE, BL TI AN OVERVIEW OF THE ELECTRONIC-PROPERTIES OF INAS1-XSBX STRAINED-LAYER SUPERLATTICES (0 GREATER-THAN-OR-EQUAL-TO X GREATER-THAN-OR-EQUAL-TO 1) SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article ID BAND-STRUCTURE; INASSB AB Long wavelength infrared photoluminescence, magneto-transmission, and detector spectral response measurements have been used to characterize the electronic properties of InAs1-xSbx/InAs1-ySby strained-layer superlattices (SLSs) ranging throughout much of the In(AsSb) ternary system. We find that there is a large type II band offset in the Sb-rich (x, y greater-than-or-equal-to 0.8 ) SLSs. Ordering and further bandgap reduction is observed in As-rich (x, y = 0.5 - 0.4 ) SLSs. In either Sb-rich or As-rich structures, optical absorption is readily extended to wavelengths greater than 10-mu-m. RP KURTZ, SR (reprint author), SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 12 TC 0 Z9 0 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 120 BP 595 EP 600 PG 6 WC Physics, Multidisciplinary SC Physics GA HT793 UT WOS:A1992HT79300109 ER PT J AU MILLER, CM PARKS, JE AF MILLER, CM PARKS, JE TI RESONANCE IONIZATION SPECTROSCOPY 1992 - PROCEEDINGS OF THE 6TH INTERNATIONAL-SYMPOSIUM ON RESONANCE IONIZATION SPECTROSCOPY AND ITS APPLICATIONS HELD IN SANTA-FE, NEW-MEXICO, USA, 24-29 MAY 1992 - PREFACE SO INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Editorial Material C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. RP MILLER, CM (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 J9 INST PHYS CONF SER JI Inst. Phys. Conf. Ser. PY 1992 IS 128 BP R5 EP R7 PG 3 WC Physics, Multidisciplinary SC Physics GA MF508 UT WOS:A1992MF50800001 ER PT J AU HILLIARD, MR SOLANKI, RS CHENG, L BUSCH, IK HARRISON, G KRAEMER, RD AF HILLIARD, MR SOLANKI, RS CHENG, L BUSCH, IK HARRISON, G KRAEMER, RD TI SCHEDULING THE OPERATION DESERT STORM AIRLIFT - AN ADVANCED AUTOMATED SCHEDULING SUPPORT SYSTEM SO INTERFACES LA English DT Article AB A typical airlift mission carrying troops and cargo to the Persian Gulf required a three-day round-trip, visited seven or more different airfields, burned almost one million pounds of fuel, and cost $280,000. During Operation Desert Storm, the Military Airlift Command (MAC) averaged more than 100 such missions daily as it managed the largest airlift in history. By August 7, 1991, more than 25,000 missions had moved more than 966,000 passengers and 774,000 tons of cargo to and from the Persian Gulf region. Each mission required scheduling aircraft, crew, and mission support resources to maximize the on-time delivery of cargo and passengers. To meet this challenge, MAC worked with the Oak Ridge National Laboratory to develop and deploy the Airlift Deployment Analysis System (ADANS). Within three months, ADANS provided a set of decision support tools to manage information on cargo and passengers to be moved and the available resources, as well as tools to schedule missions, to analyze the schedule, and to distribute the schedule to MAC's worldwide command and control system. C1 HAZARDOUS WASTE REMEDIAL ACT PROGRAM,OAK RIDGE,TN 37831. RP HILLIARD, MR (reprint author), OAK RIDGE NATL LAB,CTR TRANSPORTAT ANAL,POB 2008,OAK RIDGE,TN 37831, USA. NR 11 TC 7 Z9 7 U1 0 U2 0 PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES PI LINTHICUM HTS PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 SN 0092-2102 J9 INTERFACES JI Interfaces PD JAN-FEB PY 1992 VL 22 IS 1 BP 131 EP 146 DI 10.1287/inte.22.1.131 PG 16 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA HF685 UT WOS:A1992HF68500008 ER PT J AU GOLDSTEIN, B JONES, D KEVREKIDIS, IG PERELSON, AS AF GOLDSTEIN, B JONES, D KEVREKIDIS, IG PERELSON, AS TI EVIDENCE FOR P55-P75 HETERODIMERS IN THE ABSENCE OF IL-2 FROM SCATCHARD PLOT ANALYSIS SO INTERNATIONAL IMMUNOLOGY LA English DT Article DE IL-2; IL-2 RECEPTOR; SCATCHARD PLOT; AFFINITY CONVERSION MODEL; PREFORMED HETERODIMER MODEL; RECEPTOR AGGREGATION ID AFFINITY INTERLEUKIN-2 RECEPTOR; BETA-CHAIN; CONVERSION MODEL; MOLECULE; DISTINCT; MEMBRANE; PROTEIN; SUBUNIT; COMPLEX; FORMS AB The high affinity receptor for IL-2 is composed of at least two chains, a p55 chain that binds IL-2 with low affinity and a p75 chain that binds with intermediate affinity. Two molecular mechanisms have been proposed f or the formation of the high affinity receptor - ligand complex: The affinity conversion model proposes that the high affinity receptor is formed via stepwise binding in which IL-2 first binds to the p55 chain and the resulting complex then associates with the p75 chain to form a high affinity ternary complex. In the preformed heterodimer model the p55 and p75 chains form a non-covalently linked high affinity heterodimer in the absence of IL-2. We show that these two models can be distinguished on the basis of equilibrium binding experiments using cell lines expressing different numbers of p55 chains. To make this distinction we develop a general model for the interaction of IL-2 with its various receptors. We than analyze the case in which heterodimers exist in the absence of IL-2 and the case in which no preformed heterodimers exist. For both cases we predict the shape of equilibrium Scatchard plots. We then show that published IL-2 binding studies are consistent with a model in which a large concentration of preformed heterodimers is present on the cell surface and inconsistent with a model in which preformed heterodimers are absent from the cell surface. The models that we develop should have general applicability to the entire class of receptor systems in which low and intermediate affinity chains interact to constitute a high affinity receptor. C1 PRINCETON UNIV,DEPT CHEM ENGN,PRINCETON,NJ 08544. RP GOLDSTEIN, B (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,THEORET BIOL & BIOPHYS GRP,T-10,MS-K710,LOS ALAMOS,NM 87545, USA. FU NIAID NIH HHS [AI28433]; NIGMS NIH HHS [GM35556] NR 26 TC 24 Z9 24 U1 0 U2 2 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0953-8178 J9 INT IMMUNOL JI Int. Immunol. PD JAN PY 1992 VL 4 IS 1 BP 23 EP 32 DI 10.1093/intimm/4.1.23 PG 10 WC Immunology SC Immunology GA HB093 UT WOS:A1992HB09300004 PM 1540547 ER PT J AU SUGAMA, T CARCIELLO, NR MIURA, M AF SUGAMA, T CARCIELLO, NR MIURA, M TI ADHESION OF CRYSTALLINE POLYPHENYLETHERETHERKETONE (PEEK) IN METAL-TO-METAL JOINTS SO INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES LA English DT Article DE ADHESION; ADHESIVE-BONDED JOINTS; POLYPHENYLETHERETHERKETONE; STEELS; CRYSTALLIZATION; INTERFACE ID POLYIMIDE INTERFACE; POLYMER SURFACES; SPECTROSCOPY AB The characteristics of melt-crystallized polyphenyletheretherketone (PEEK) as an adhesive for steel-to-steel joints have been investigated. Interfacial chemistry, which plays an important role in determining whether adhesion will be poor or good at PEEK/steel interfaces, involved the following reactions. Oxygen-catalysed deformation of PEEK in air led to a low rate of crystallinity, which gave poor adhesion to the steel surfaces. The enrichment of Fe2O3 by extensive oxidation of the interfaces also created an undesirable boundary region, thereby indicating that failure occurs cohesively through this weak Fe2O3 layer. X-ray photoelectron spectroscopy (XPS) data suggest that there is no chemical interaction of well-crystallized PEEK with Fe2O3 at the top surface of steels. In contrast, in nitrogen, interfacial Fe- and Cr-O-C complexes, formed by a charge transfer between elemental Fe or Cr in steel and oxygen in the ketone groups (C = O) of crystallized PEEK, contributed significantly to strengthening the PEEK-to-steel bonds. RP SUGAMA, T (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV ENERGY EFFICIENCY & CONSERVAT,UPTON,NY 11973, USA. NR 12 TC 13 Z9 13 U1 0 U2 5 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0143-7496 J9 INT J ADHES ADHES JI Int. J. Adhes. Adhes. PD JAN PY 1992 VL 12 IS 1 BP 27 EP 37 DI 10.1016/0143-7496(92)90005-G PG 11 WC Engineering, Chemical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA HL254 UT WOS:A1992HL25400004 ER PT J AU COSGROVE, JDF DIAZ, JC GRIEWANK, A AF COSGROVE, JDF DIAZ, JC GRIEWANK, A TI APPROXIMATE INVERSE PRECONDITIONINGS FOR SPARSE LINEAR-SYSTEMS SO INTERNATIONAL JOURNAL OF COMPUTER MATHEMATICS LA English DT Article DE INVERSE PRECONDITIONING; SPARSE LINEAR SYSTEMS; ADAPTIVE METHOD ID BLOCK AB We discuss a procedure for the adaptive construction of sparse approximate inverse preconditionings for general sparse linear systems. The approximate inverses are based on minimizing a consistent norm of the difference between the identity and the preconditioned matrix. The analysis provides positive definiteness and condition number estimates for the preconditioned system under certain circumstances. We show that for the 1-norm, restricting the size of the difference matrix below 1 may require dense approximate inverses. However, this requirement does not hold for the 2-norm, and similarly reducing the Frobenius norm below 1 does not generally require that much fill-in. Moreover, for the Frobenius norm, the calculation of the approximate inverses yields naturally column-oriented parallelism. General sparsity can be exploited in a straightforward fashion. Numerical criteria are considered for determining which columns of the sparse approximate inverse require additional fill-in. Spare algorithms are discussed for the location of potential fill-in within each column. Results using a minimum-residual-type iterative method are presented to illustrate the potential of the method. C1 UNIV TULSA,CTR PARALLEL & SCI COMP,TULSA,OK 74104. ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439. RP COSGROVE, JDF (reprint author), CAMERTON UNIV,LAWTON,OK 73505, USA. NR 18 TC 65 Z9 65 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0020-7160 J9 INT J COMPUT MATH JI Int. J. Comput. Math. PY 1992 VL 44 IS 1-4 BP 91 EP 110 DI 10.1080/00207169208804097 PG 20 WC Mathematics, Applied SC Mathematics GA JR515 UT WOS:A1992JR51500008 ER PT J AU DAZEVEDO, EF FORSYTH, PA TANG, WP AF DAZEVEDO, EF FORSYTH, PA TANG, WP TI DROP TOLERANCE PRECONDITIONING FOR INCOMPRESSIBLE VISCOUS-FLOW SO INTERNATIONAL JOURNAL OF COMPUTER MATHEMATICS LA English DT Article DE PRECONDITIONING; DROP TOLERANCE; ORDERING; NAVIER-STOKES ID CONJUGATE GRADIENTS; ITERATIVE METHODS; SIMULATION; EQUATIONS; ALGORITHM; SYSTEMS AB The minimum updating matrix ordering (MUM) is combined with a drop tolerance preconditioned iterative method for solution of Jacobians derived from incompressible Navier-Stokes problems. Test results are presented for full computations to steady state. For high Reynold's number flows, the scaling of the variables has an important effect. C1 UNIV WATERLOO,DEPT COMP SCI,WATERLOO N2L 3G1,ONTARIO,CANADA. RP DAZEVEDO, EF (reprint author), OAK RIDGE NATL LAB,MATH SCI SECT,OAK RIDGE,TN 37830, USA. NR 23 TC 6 Z9 6 U1 0 U2 2 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0020-7160 J9 INT J COMPUT MATH JI Int. J. Comput. Math. PY 1992 VL 44 IS 1-4 BP 301 EP 312 DI 10.1080/00207169208804110 PG 12 WC Mathematics, Applied SC Mathematics GA JR515 UT WOS:A1992JR51500021 ER PT J AU GARTEN, CT AF GARTEN, CT TI NITROGEN ISOTOPE COMPOSITION OF AMMONIUM AND NITRATE IN BULK PRECIPITATION AND FOREST THROUGHFALL SO INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY LA English DT Article DE STABLE NITROGEN ISOTOPES; N-15; BULK PRECIPITATION; THROUGHFALL; CLOUD WATER; ION EXCHANGE ID ATMOSPHERIC DEPOSITION; RAIN; RATIOS RP GARTEN, CT (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 17 TC 72 Z9 78 U1 0 U2 17 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0306-7319 J9 INT J ENVIRON AN CH JI Int. J. Environ. Anal. Chem. PY 1992 VL 47 IS 1 BP 33 EP 45 DI 10.1080/03067319208027017 PG 13 WC Chemistry, Analytical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA JA066 UT WOS:A1992JA06600004 ER PT J AU LAIRD, G RAWERS, JC AF LAIRD, G RAWERS, JC TI FINITE-ELEMENT ANALYSIS OF A LASER-PROCESSED FRACTURE SPECIMEN SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article ID STEEL; SAMPLES AB Finite element analysis was used to simulate the static failure of a AISI 4140, three-point bend. Charpy specimen. Non-linear finite element models (FEM) were constructed to represent standard Charpy, fatigue-precracked Charpy, and laser-processed Charpy specimens. For the laser-processed Charpy FEM, a strain-based failure criterion was used to simulate crack propagation through the 0.5 mm thick laser-processed zone. For comparison, a 0.5 mm long crack was used in the fatigue-precracked FEM and similarly loaded. Results showed that the numerically calculated load for crack initiation through this zone compared favorably to that reported in earlier experiments. Furthermore, after the crack had propagated through the laser-processed zone within the FEM-comparison of plastic strain contours for this model and that for a fatigue-precracked model showed that similar patterns exist around the crack tip. These results indicate that laser-processing and fatigue-precracking should provide a similar basis for fracture toughness measurements. RP LAIRD, G (reprint author), US BUR MINES,ALBANY RES CTR,ALBANY,OR 97321, USA. NR 18 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PD JAN 1 PY 1992 VL 53 IS 1 BP 91 EP 99 PG 9 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA HE116 UT WOS:A1992HE11600006 ER PT J AU MEDVICK, PA HOLLEN, RM ROBERTS, RS TRIMMER, D BEUGELSDIJK, TJ AF MEDVICK, PA HOLLEN, RM ROBERTS, RS TRIMMER, D BEUGELSDIJK, TJ TI AUTOMATED DNA HYBRIDIZATION ARRAY CONSTRUCTION AND DATABASE DESIGN FOR ROBOTIC CONTROL AND FOR SOURCE DETERMINATION OF HYBRIDIZATION RESPONSES SO INTERNATIONAL JOURNAL OF GENOME RESEARCH LA English DT Article AB The human genome effort has highlighted a huge area for potential automation that is necessary in order for the program to succeed. Much of the work in preparing maps of individual human chromosomes involves labor-intensive highly repetitive tasks. We have concentrated on automating the procedure of gridding hybridization membranes from microtiter-well plates and on developing a database for robotic control and for initial storage of hybridization results. On the basis of numerous interactions with biologists on the human genome project, we designed our gridding system to produce high-density grids on a 20- by 22-cm membrane, to require initial user interactions for setup, and, thereafter, to proceed untended with the gridding of the membrane. The software is written in the object-oriented style of the Robot Independent Programming Language (RlPL), developed by Sandia National Laboratories, to increase flexibility and maintainability. A path table in a relational database provides location information to the robotic arm and permits rapid changes in the robot movement patterns. Database tables track an individual microtiter well to its membrane location. Planned system improvements include incorporating a UNIX-based computer workstation with object-oriented database for integrating the initial colony-picking, membrane gridding and hybridized membrane film assessment into one system. C1 LOS ALAMOS NATL LAB,DIV MECH & ELECTR ENGN,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545. NR 6 TC 3 Z9 3 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-1932 J9 INT J GENOME RES PY 1992 VL 1 IS 1 BP 17 EP 23 PG 7 GA LK954 UT WOS:A1992LK95400002 ER PT J AU CHEN, CH PAYNE, MG JACOBSON, KB AF CHEN, CH PAYNE, MG JACOBSON, KB TI A NOVEL VACUUM-ULTRAVIOLET IONIZER MASS-SPECTROMETER FOR DNA-SEQUENCING SO INTERNATIONAL JOURNAL OF GENOME RESEARCH LA English DT Article ID RESONANT 2-PHOTON IONIZATION; PULSED LASER DESORPTION; ELECTROPHORESIS; SPECTROSCOPY; MOLECULES; ATOMS AB The construction of a new high resolution mass spectrometer equipped with a vacuum ultraviolet (VUV) photoionizer can be valuable for human genome sequencing. This approach could eliminate the need for both gel electrophoresis and radioactive tagging, while at the same time speeding up the rate of DNA sequencing. This method could conceivably be used to sequence DNA segments up to 3000 nucleotides in length. The major steps for DNA sequencing by this approach are listed in the following: (1) An organometallic compound such as ferrocene will be tagged into DNA molecules by means of the primer sequence. The method uses the standard dideoxy terminator method to obtain DNA segments terminated in A, G, C and T. (2) Soft laser desorption methods will be used to deliver DNA segments with ferrocene tagging to the ionization zone of a mass spectrometer without any decomposition of the DNA segments. (3) A tunable vacuum ultraviolet (VUV) or ultraviolet (UV) coherent beam will be used to carry out near threshold ionization of the DNA segments in order to avoid the production of any fragmented ions. If ionization occurs, there is almost no energy left over to cause dissociation. (4) Ions produced from a VUV ionization will be introduced into a mass spectrometer which will be capable of measuring molecular weights higher than 100,000 daltons. If the techniques prove to be successful, they would be very beneficial to other biological and medical research such as the sequencing of proteins and peptides and the analysis of macromolecules and large polymers. C1 OAK RIDGE NATL LAB,CHEM PHYS SECT,PHOTOPHYS GRP,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. NR 42 TC 8 Z9 8 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-1932 J9 INT J GENOME RES PY 1992 VL 1 IS 1 BP 25 EP 43 PG 19 GA LK954 UT WOS:A1992LK95400003 ER PT J AU DRMANAC, R CRKVENJAKOV, R AF DRMANAC, R CRKVENJAKOV, R TI SEQUENCING BY HYBRIDIZATION (SBH) WITH OLIGONUCLEOTIDE PROBES AS AN INTEGRAL APPROACH FOR THE ANALYSIS OF COMPLEX GENOMES SO INTERNATIONAL JOURNAL OF GENOME RESEARCH LA English DT Article ID BASE SEQUENCE; DNA; CONSTRUCTION; MOLECULES; GENETICS; AFFINITY; COSMIDS; CLONES; SITES AB Sequencing by oligonucleotide hybridization was proposed a few years ago by several groups as an alternative to gel-based sequencing methods that was possibly more suitable for high-volume DNA sequencing. This method is basically different from other methods. Experimental data in the form of lists of constituent oligonucleotide sequences is used to produce DNA sequences via an extensive computational analysis. A specific feature of the method is that similar sequences studied in parallel mutually help each other's determination, with less total experimental data than required for each of them alone. Also, a controlled, reproducible and uniform sampling of sequence information can be performed to a level allowing overview of the sequence at a desired degree of precision. Partial sequence information obtained in this way on genomic DNAs create structural genome maps truly analogous to geographic maps. Technologically, samples can be analyzed in adjustable volumes (macro and micro scale) in a highly parallel and automated scheme with either the DNA or the oligonucleotide probes attached to a support. Experimental results and theoretical predictions demonstrate the capacity of the method to efficiently inspect complex genomes on the sequence level at high speed and low cost. C1 ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. NR 52 TC 21 Z9 21 U1 0 U2 7 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-1932 J9 INT J GENOME RES PY 1992 VL 1 IS 1 BP 59 EP 79 PG 21 GA LK954 UT WOS:A1992LK95400005 ER PT J AU HANCHAK, SJ FORRESTAL, MJ YOUNG, ER EHRGOTT, JQ AF HANCHAK, SJ FORRESTAL, MJ YOUNG, ER EHRGOTT, JQ TI PERFORATION OF CONCRETE SLABS WITH 48-MPA (7-KSI) AND 140-MPA (20-KSI) UNCONFINED COMPRESSIVE STRENGTHS SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article AB We conducted perforation experiments with 25.4-mm diameter, 0.50-kg, 3.0-caliberradius-head, ogival-nose rods and 178-mm-thick concrete slabs with 48 MPa (7 ksi) and 140 MPa (20 ksi) unconfined compressive strengths. For impact velocities between 300 and 1100 m/s, our data showed that residual velocities for the 140 MPa concrete were less than 20% lower than that for the 48 MPa concrete. Thus, for a factor of three increase in unconfined compressive strength, we measured relatively minor changes in ballistic perforation performance. We explained these results qualitatively with post-test observations and triaxial material experiments with the 48 and 140 MPa concrete materials. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. WATERWAYS EXPT STN,VICKSBURG,MS. RP HANCHAK, SJ (reprint author), UNIV DAYTON,RES INST,DAYTON,OH 45469, USA. NR 6 TC 121 Z9 161 U1 2 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1992 VL 12 IS 1 BP 1 EP 7 DI 10.1016/0734-743X(92)90282-X PG 7 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA HM380 UT WOS:A1992HM38000001 ER PT J AU RABERN, DA AF RABERN, DA TI AXIAL AND LATERAL IMPULSIVE LOADING OF KINETIC-ENERGY PROJECTILES DURING LAUNCH .1. EXPERIMENTAL INVESTIGATIONS SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article AB The experimental methodology and data analysis techniques used to characterize the performance of a sabot/rod as it is subjected to lateral and axial loading during launch is presented. The experimental portion of the research involved full-scale testing of two separate sabot/rod designs in a 120-mm launch tube that was slightly bent. When launched through the bent tube, the sabot/rod system was forced to negotiate lateral displacements at axial velocities of approximately 1650 m/s. This combination of axial velocity and lateral displacement produced significant lateral loading on the sabot/rod system. A 2.3-MeV X-ray unit was used to determine the lateral displacement that occurred as the sabot/rod was forced through the bent tube. After the sabot/rod exited the launch tube, the sabot separation and rod straightness were recorded by four 150-keV X-ray units. The inbore radiography experiments used X-ray shielding techniques to reduce X-ray scatter, and layered indexed film and intensifer screens to record the sabot/rod image. The processed film was computer scanned with a microdensitometer and was remapped on the computer to enhance the X-ray image. Results indicated rod lateral displacement accuracy to 0.11 mm. Test results were used to determine the sabot and rod behavior caused by loading histories of axial and lateral impulsive loadings. RP RABERN, DA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 12 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1992 VL 12 IS 1 BP 49 EP 64 DI 10.1016/0734-743X(92)90326-O PG 16 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA HM380 UT WOS:A1992HM38000005 ER PT J AU RABERN, DA AF RABERN, DA TI AXIAL AND LATERAL IMPULSIVE LOADING OF KINETIC-ENERGY PROJECTILES DURING LAUNCH .2. NUMERICAL SIMULATIONS SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article AB The methodology and analysis used to characterize the performance of a sabot/rod as it is subjected to lateral and axial loading during launch is presented. In Part I. Experimental Investigations, a methodology for determining the deformed shape of a projectile while inbore was presented with results from full-scale experiments. In Part II. Numerical Simulations, those results were used to benchmark simulations of the experiments with the displacement data obtained from enhanced radiographs. Because of the good agreement between the experimental and numerical models, stress, strain and displacement time histories were obtained from the numerical work and used to evaluate sabot/rod mechanical and structural behavior while inbore. The benchmarked numerical simulations involved three-dimensional modeling of the sabot/rod systems in three launch tube environments: the slightly bent tube used in the experimental program, an existing accuracy tube and a perfectly straight launch tube. A dynamic analysis was performed for each of nine separate models. Sliding surfaces, nonlinear constitutive relations and multiple materials were used for each analysis. Results from numerical analyses are presented with reference to experimental results reported in Part I. Experimental Investigations. RP RABERN, DA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 22 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1992 VL 12 IS 1 BP 65 EP 88 DI 10.1016/0734-743X(92)90337-S PG 24 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA HM380 UT WOS:A1992HM38000006 ER PT J AU YOUNGDAHL, CK AF YOUNGDAHL, CK TI OPTIMUM APPROXIMATE MODES OF STRAIN-HARDENING BEAMS SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article ID DEFORMATION AB The effects of using various mode forms and various types of matching conditions on the accuracy of a mode approximation method for strain-hardening structures is examined. Although accuracy is improved by increasing the complexity of the approximation, good results arc obtained for the simplest practical formulation provided the choice of the best combination of mode shape and matching condition is made. RP YOUNGDAHL, CK (reprint author), ARGONNE NATL LAB,DIV REACTOR ENGN,ARGONNE,IL 60439, USA. NR 17 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1992 VL 12 IS 2 BP 227 EP 240 DI 10.1016/0734-743X(92)90434-U PG 14 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA JG296 UT WOS:A1992JG29600005 ER PT J AU FORRESTAL, MJ LUK, VK AF FORRESTAL, MJ LUK, VK TI PENETRATION INTO SOIL TARGETS SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article ID PROJECTILES AB We developed penetration equations for ogival-nose projectiles that penetrated soil targets after normal impact. The spherical cavity-expansion approximation simplified the target analysis, so we obtained closed-form penetration equations. To verify our model, we conducted field tests into soil targets with 23.1 kg, 95.25 mm diameter projectiles and obtained rigid-body decelerations and final penetration depths. Model predictions show good agreement with measurements for five tests conducted at an impact velocity of 280 m s-1. RP FORRESTAL, MJ (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 14 TC 111 Z9 160 U1 3 U2 22 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1992 VL 12 IS 3 BP 427 EP 444 DI 10.1016/0734-743X(92)90167-R PG 18 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA JN517 UT WOS:A1992JN51700008 ER PT J AU RABERN, DA AF RABERN, DA TI NUMERICAL SIMULATIONS OF GUN-LAUNCHED KINETIC-ENERGY PROJECTILES SUBJECTED TO ASYMMETRIC PROJECTILE BASE-PRESSURE SO INTERNATIONAL JOURNAL OF IMPACT ENGINEERING LA English DT Article AB Three-dimensional numerical simulations were performed to determine the effect of an asymmetric base pressure on kinetic energy projectiles during launch. A matrix of simulations was performed in two separate launch environments. One launch environment represented a severe lateral load environment, while the other represented a nonsevere lateral load environment based on the gun tube straightness. The orientation of the asymmetric pressure field, its duration, the projectile's initial position and the tube straightness were altered to determine the effects of each parameter. The pressure asymmetry translates down the launch tube to exit parameters and is not washed out by tube profile. Results from the matrix of simulations are presented. RP RABERN, DA (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0734-743X J9 INT J IMPACT ENG JI Int. J. Impact Eng. PY 1992 VL 12 IS 3 BP 445 EP 457 DI 10.1016/0734-743X(92)90178-V PG 13 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA JN517 UT WOS:A1992JN51700009 ER PT J AU REDHORSE, JR SPANOS, PD AF REDHORSE, JR SPANOS, PD TI A GENERALIZATION TO STOCHASTIC AVERAGING IN RANDOM VIBRATION SO INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS LA English DT Article ID RANDOM-EXCITATION; OSCILLATORS AB Stochastic averaging is applied to a class of randomly excited single degree-of-freedom oscillators possessing linear damping and non-linear stiffness terms. The assumed excitation form involves an externally applied evolutionary Gaussian stochastic process. Special emphasis is placed on casting the problem in a more formal mathematical framework than that traditionally used in engineering applications. For the case under consideration, it is shown that a critical step involves the selection of an appropriate period of oscillation over which the temporal averaging can be performed. As an example, this averaging procedure is performed on a Duffing oscillator. The validity of the derived result is partially confirmed by reducing it to a special case, for which there is a known solution, and comparing both solutions. C1 RICE UNIV,DEPT MECH ENGN,HOUSTON,TX 77251. RP REDHORSE, JR (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 21 TC 24 Z9 25 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7462 J9 INT J NONLINEAR MECH JI Int. J. Non-Linear Mech. PD JAN PY 1992 VL 27 IS 1 BP 85 EP 101 DI 10.1016/0020-7462(92)90025-3 PG 17 WC Mechanics SC Mechanics GA HB703 UT WOS:A1992HB70300008 ER PT J AU SHUM, DKM AF SHUM, DKM TI CRACK-TIP FIELDS UNDER GENERALIZED-PLANE-STRAIN CONDITIONS SO INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING LA English DT Article AB Quantitative determination of crack-tip stress and strain fields under generalized-plane-strain conditions is a necessary first step toward estimating the potential decrease in crack-initiation toughness, from a reference plane strain value, due to positive straining along the crack front of a circumferential flaw in a reactor pressure vessel. Two methods for estimating the stress and strain fields within a distance of a few crack-tip-opening displacements ahead of a two-dimensional crack front under generalized-plane-strain conditions are summarized in this study. The first method requires little computational effort and involves an analytical description of the near-crack-tip region based on generalized-plane-strain slip-line equations. The second method requires much greater computational effort and involves a finite-strain, boundary-layer description of the near-crack-tip region based on the finite element method. The scope of the investigation described here is limited to crack-front-constraint conditions that can be described in terms of the conventional one-parameter in-plane K-fields and the transverse strain. Results from this study indicate that crack-tip fields determined using the slip-line approach compare favorably with those determined using the finite element method. Implications of these results toward crack initiation under generalized-plane-strain conditions are discussed. RP SHUM, DKM (reprint author), OAK RIDGE NATL LAB,HEAVY SECT STEEL TECHNOL PROGRAM,POB 2009,OAK RIDGE,TN 37831, USA. NR 0 TC 4 Z9 4 U1 1 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0308-0161 J9 INT J PRES VES PIP JI Int. J. Pressure Vessels Pip. PY 1992 VL 51 IS 3 BP 271 EP 294 DI 10.1016/0308-0161(92)90101-K PG 24 WC Engineering, Multidisciplinary; Engineering, Mechanical SC Engineering GA HQ862 UT WOS:A1992HQ86200001 ER PT J AU CHUNG, HM AF CHUNG, HM TI AGING AND LIFE PREDICTION OF CAST DUPLEX STAINLESS-STEEL COMPONENTS SO INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING LA English DT Article; Proceedings Paper CT INTERNATIONAL COLLOQUIUM ON AGEING OF MATERIALS AND METHODS FOR THE ASSESSMENT AND EXTENSION OF LIFETIMES OF ENGINEERING PLANT CY APR, 1991 CL CAPE TOWN, SOUTH AFRICA AB Case duplex stainless steels, used extensively in nuclear, chemical, and petroleum industries because of higher strength, better weldability, higher resistance to stress corrosion cracking, and soundness of casting, are susceptible to thermal aging embrittlement during service at temperatures as low as approximately 250-degrees-C. Recent advances in understanding the aging mechanisms, kinetics, and mechanical properties are presented, with emphasis on application of the material in safety-significant components in a nuclear reactor. Aging embrittlement is primarily due to spinodal decomposition of ferrite involving segregation of Fe, Cr, and Ni, and precipitation of M23C6 on ferrite-austenite boundaries or in ferrite. Aging kinetics are strongly influenced by synergistic effects of other metallurgical reactions that occur in parallel with the spinodal decomposition, i.e. clustering of Ni, Mo, and Si and G-phase precipitation in ferrite. A number of methods are outlined for estimating end-of-life aging, depending on several factors such as degree of permissible conservatism, availability of component archive material, and methods of estimating and verifying the activation energy of aging. RP CHUNG, HM (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. NR 0 TC 57 Z9 73 U1 3 U2 16 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0308-0161 J9 INT J PRES VES PIP JI Int. J. Pressure Vessels Pip. PY 1992 VL 50 IS 1-3 BP 179 EP 213 DI 10.1016/0308-0161(92)90037-G PG 35 WC Engineering, Multidisciplinary; Engineering, Mechanical SC Engineering GA HK756 UT WOS:A1992HK75600012 ER PT J AU RASOLT, M VIGNALE, G PERROT, F AF RASOLT, M VIGNALE, G PERROT, F TI CURRENT-DENSITY FUNCTIONAL THEORY IN A CONTINUUM AND LATTICE LAGRANGIANS - APPLICATION TO SPONTANEOUSLY BROKEN CHIRAL GROUND-STATES SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article ID VALENCE-BOND STATE; ELECTRON-GAS; FLUX PHASES; MONTE-CARLO; SUPERCONDUCTIVITY; MODEL; SYSTEMS; FIELDS AB We formulate the current-density functional theory for systems in arbitrarily strong magnetic fields. A set of self-consistent equations comparable to the Kohn-Sham equations for ordinary density functional theory is derived, and proved to be gauge-invariant and to satisfy the continuity equation. These equations of Vignale and Rasolt involve the gauge field corresponding to the external magnetic field as well as a new gauge field generated entirely from the many-body interactions. We next extend this gauge theory (following Rasolt and Vignale) to a lattice Lagrangian believed to be appropriate to a tight-binding Hamiltonian in the presence of an external magnetic field. We finally examine the nature of the ground state of a strongly nonuniform electron gas in the presence of this many-body, self-induced gauge field. C1 UNIV MISSOURI, DEPT PHYS, COLUMBIA, MO 65211 USA. CEA, F-94190 VILLENUVE ST GEOR, FRANCE. RP RASOLT, M (reprint author), OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. NR 31 TC 0 Z9 0 U1 0 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0020-7608 EI 1097-461X J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PY 1992 SU 26 BP 359 EP 370 PG 12 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA JZ004 UT WOS:A1992JZ00400029 ER PT J AU BOETTGER, JC AF BOETTGER, JC TI CALCULATIONS OF THICKNESS DEPENDENCIES IN THE PROPERTIES OF ULTRA-THIN FILMS SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON ATOMIC, MOLECULAR, AND CONDENSED MATTER THEORY AND COMPUTATIONAL METHODS CY MAR 14-21, 1992 CL ST AUGUSTINE, FL SP USA, RES OFF, USN, OFF NAVAL RES, US DOE, OFF HLTH & ENVIRONM RES, HYPER CHEM AUTODESK ID METAL-FILMS; ELECTRONIC-PROPERTIES; WORK FUNCTION; BERYLLIUM; DENSITY; POTENTIALS; MONOLAYERS; DILAYER AB The linear combinations of Gaussian type orbitals-fitting function (LCGTO-FF) technique has been used over the past eight years, to study a number of ultra-thin film (UTF) systems. Unlike most first principles work in this field, this ongoing investigation focussed on the ground-state properties of UTFs at their equilibrium geometries, as opposed to simply using the UTFs to model some macroscopic system. A summary of the statUS of LCGTO-FF UTF work is presented with emphasis on the variation of properties as a function of film thickness. One of the more important findings is that the interplanar separation and binding of Li has not converged for a 5-layer UTF. This result calls into question all surface relaxation calculations in which only the outer one or two layers are allowed to relax. RP BOETTGER, JC (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 32 TC 0 Z9 0 U1 1 U2 1 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PY 1992 SU 26 BP 633 EP 642 PG 10 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA JZ004 UT WOS:A1992JZ00400054 ER PT J AU HALLAHAN, DE VIRUDACHALAM, S GRDINA, D WEICHSELBAUM, RR AF HALLAHAN, DE VIRUDACHALAM, S GRDINA, D WEICHSELBAUM, RR TI THE ISOQUINOLINE SULFONAMIDE-H7 ATTENUATES RADIATION-MEDIATED PROTEIN-KINASE-C ACTIVATION AND DELAYS THE ONSET OF X-RAY-INDUCED G2-ARREST SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE IONIZING RADIATION; PROTEIN KINASE-C; CELL CYCLE REGULATION ID FACTOR GENE-EXPRESSION; IONIZING-RADIATION; CELL-CYCLE; STAUROSPORINE; INHIBITOR; INDUCTION AB Protein kinase C activation by ionizing radiation in human tumor cell lines participates in the transcriptional activation of genes which may be associated with the phenotypic response of cells to x-rays. We gamma-irradiated cell line RIT-3 (radiation-induced human sarcoma) and quantified the phosphorylating capacity of protein kinase C. Protein kinase C activity increased rapidly and transiently in these cells. The selective protein kinase C inhibitor H7 attenuated radiation-mediated protein kinase C activation when added to cells prior to irradiation. To determine whether protein kinase C activation is associated with radiation-induced G2 arrest, we analyzed the cell cycle distribution of cells following gamma-irradiation. Following irradiation, RIT-3 cells rapidly progressed through G1 and S and subsequently underwent a dose dependent G2 arrest. At concentrations which are selective for protein kinase C inhibition, H7 delayed the onset of radiation-induced G2 arrest. However, there was no difference in the duration of G2 arrest following the addition of inhibitor as compared to cells irradiated without inhibitor. We propose that protein kinase C activation by ionizing radiation is associated with radiation-mediated cell cycle regulation. C1 UNIV CHICAGO,DEPT RADIAT & CELLULAR ONCOL,CHICAGO,IL 60637. UNIV CHICAGO,PRITZKER SCH MED,CHICAGO,IL 60637. ARGONNE NATL LAB,DIV BIOL & MED,ARGONNE,IL 60439. FU NCI NIH HHS [CA41068, CA37435] NR 22 TC 26 Z9 26 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 24 IS 4 BP 687 EP 692 PG 6 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA JY089 UT WOS:A1992JY08900014 PM 1429092 ER PT J AU FEEHAN, PE CASTRO, JR PHILLIPS, TL PETTI, P COLLIER, JM DAFTARI, I FU, K AF FEEHAN, PE CASTRO, JR PHILLIPS, TL PETTI, P COLLIER, JM DAFTARI, I FU, K TI RECURRENT LOCALLY ADVANCED NASOPHARYNGEAL CARCINOMA TREATED WITH HEAVY CHARGED-PARTICLE IRRADIATION SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Note CT 33RD MEETING OF THE AMERICAN SOC FOR THERAPEUTIC RADIOLOGY AND ONCOLOGY CY NOV 04-08, 1991 CL WASHINGTON, DC SP AMER SOC THERAPEUT RADIOL & ONCOL DE NASOPHARYNGEAL CARCINOMA; HELIUM ION RADIOTHERAPY; NEON ION RADIOTHERAPY; CHARGED PARTICLE RADIOTHERAPY ID RADIOBIOLOGY; TUMORS; IONS AB Between June 1981 and May 1990, 11 patients with recurrent locally advanced nasopharyngeal carcinoma were treated with heavy charged particle radiation at Lawrence Berkeley Laboratory. All patients had previously undergone full course radiotherapy to a median dose of 70.2 Gy [range 61-81 Gy]. Median time to recurrence was 18.2 months. At the time of heavy charged particle radiotherapy treatment, all had evidence of invasion of the base of skull and 7 of 11 had cranial nerve deficits. None of the patients were candidates for brachytherapy because of tumor extent or poor geometry. The tumor histology was squamous cell carcinoma in 10 patients and lymphoepithelioma in one patient. Ten of the 11 patients had received chemotherapy prior to re-irradiation. The heavy charged particle tumor dose delivered ranged from 31.80 GyE to 62.30 GyE (average 50.25 GyE, median 50 GyE). Local control was achieved in 45%. Median survival was 42 months. Actuarial survival was 59% at 3 years and 31% at 5 years (Kaplan-Meier). There were no fatal complications. The results in treating locally advanced recurrent nasopharyngeal carcinoma with heavy charged particles appear superior to those reported by others using photon therapy. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FEEHAN, PE (reprint author), UNIV CALIF SAN FRANCISCO,DEPT RADIAT ONCOL,L-75,SAN FRANCISCO,CA 94143, USA. FU NCI NIH HHS [CA19138] NR 18 TC 26 Z9 28 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 23 IS 4 BP 881 EP 884 PG 4 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA JD828 UT WOS:A1992JD82800023 PM 1618678 ER PT J AU MEECHAN, PJ HARAF, DJ DIAMOND, AM GRDINA, DJ AF MEECHAN, PJ HARAF, DJ DIAMOND, AM GRDINA, DJ TI REVERSION OF RADIOSENSITIVITY IN AZACYTIDINE-TREATED XRS5 CELLS DOES NOT RESULT IN FULL RADIOPROTECTION BY WR-1065 SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE XRS5; WR-1065; RADIOPROTECTOR; AMINOTHIOL; CHO; GAMMA RADIATION ID HAMSTER OVARY CELLS; RADIORESISTANT DERIVATIVES; SENSITIVITY; RADIATION; CISPLATIN; WR1065 AB A series of cell lines were previously generated from the radiation sensitive Chinese hamster ovary line xrs5 after treatment with azacytidine. Six of these lines have been examined for their resistance to killing by 0 to 20 Gray of Co-60 gamma rays and the amount of radioprotection afforded by treatment with the drug 2-[(aminopropyl)amino]ethanethiol (WR-1065). As xrs5 cells have lost the ability to be protected by WR-1065, studies were performed to determine whether reversion to radio-resistance correlated with recovery of aminothiol radioprotection. Treatment of azacytidine-treated, radiation sensitive and resistant cells with four millimolar WR-1065 30 minutes prior to irradiation enhanced survival after exposure to gamma radiation, although the enhancement in survival was less than for wild type Chinese hamster ovary K1 cells. The data suggest that there is not an absolute linkage between recovery of gamma ray radiation resistance and protection by WR-1065 and other factors, such as chromatin organization, must play a role. C1 NO ILLINOIS UNIV,DEPT BIOL SCI,DE KALB,IL 60115. UNIV CHICAGO,DEPT RADIAT & CELLULAR ONCOL,CHICAGO,IL 60637. ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. FU NCI NIH HHS [CA-37435]; NCRR NIH HHS [S07 RR07176] NR 20 TC 9 Z9 9 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 23 IS 5 BP 999 EP 1002 PG 4 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA JG301 UT WOS:A1992JG30100013 PM 1379219 ER PT J AU LO, EH FRANKEL, KA STEINBERG, GK DELAPAZ, RL FABRIKANT, JI AF LO, EH FRANKEL, KA STEINBERG, GK DELAPAZ, RL FABRIKANT, JI TI HIGH-DOSE SINGLE-FRACTION BRAIN IRRADIATION - MRI, CEREBRAL BLOOD-FLOW, ELECTROPHYSIOLOGICAL, AND HISTOLOGICAL STUDIES SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE DELAYED RADIATION INJURY; BLOOD-BRAIN BARRIER; REGIONAL CEREBRAL BLOOD FLOW; EVOKED POTENTIALS; RADIOSURGERY; BRAIN ID CENTRAL-NERVOUS-SYSTEM; RAT-BRAIN; ARTERIOVENOUS-MALFORMATIONS; STEREOTACTIC RADIOSURGERY; LINEAR-ACCELERATOR; RADIATION-INJURY; X-IRRADIATION; DAMAGE; METASTASES AB Radiation-induced alterations in cerebrovascular and metabolic function form the basis for the radiosurgical treatment of selected intracranial vascular malformations and tumors in human patients. However, the underlying mechanisms, temporal progression, and modifying factors involved in the radiosurgical obliteration of these intracranial lesions as well as the risks of delayed radiation injury to surrounding normal brain remain poorly understood. In this report, the rabbit brain was used as an animal model to examine the effects of high-dose single-fraction X-irradiation on magnetic resonance imaging (MRI) appearance, neurophysiologic function, and histological integrity. At approximately 10 weeks following left-hemisphere irradiation with 60 Gy (225 kVp) X rays, MRI studies showed radiation-induced changes including blood-brain barrier (BBB) perturbations in the white matter regions and the hippocampus. Significant reductions in regional cerebral blood flow (rCBF) ratios were found in the hippocampus and certain regions of the cortex in irradiated animals. However, no changes in somatosensory evoked potentials (SEP) were observed. Histological studies demonstrated telangiectatic vessels, spreading edema in the white matter, and focal regions of necrosis and hemorrhage in the irradiated cortices and hippocampi. These results demonstrate that the irradiated rabbit brain may be used as an experimental model to correlate the spatiotemporal pattern of functional changes with radiologic and histological changes in delayed radiation injury. C1 STANFORD UNIV,MED CTR,SCH MED,DEPT NEUROSURG,STANFORD,CA 94305. STANFORD UNIV,MED CTR,SCH MED,DEPT RADIOL,STANFORD,CA 94305. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. FU NCRR NIH HHS [RR05918, RR05353] NR 44 TC 20 Z9 20 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 22 IS 1 BP 47 EP 55 PG 9 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA GU932 UT WOS:A1992GU93200007 PM 1727129 ER PT J AU LYMAN, JT AF LYMAN, JT TI NORMAL TISSUE COMPLICATION PROBABILITIES - VARIABLE DOSE PER FRACTION SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article ID RADIATION-THERAPY; OPTIMIZATION AB Because of the large amount of data generated by 3D treatment planning, new tools are being developed for the evaluation and optimization of the plans. Estimates of the probability of local control of the tumor and for the probability of specific normal tissue complications are among the new tools. The normal tissue complication probability (NTCP) is based on clinical estimates of the tolerance doses for specific tissues/organs. These tolerance doses are assumed to apply for uniform partial and full volume irradiations delivered at 2 Gy per fraction and 5 fractions per week. A different tolerance dose may apply when the dose is delivered at a different dose per fraction and over a different period of time. This study evaluates the maximum change expected in the NTCP when the normal structure receives the dose at a different dose per fraction than the target volume due to different choices in the delivery of the daily fraction. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. FU NCI NIH HHS [CA 42940] NR 14 TC 20 Z9 21 U1 0 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0360-3016 EI 1879-355X J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 22 IS 2 BP 247 EP 250 PG 4 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA GX876 UT WOS:A1992GX87600004 PM 1740391 ER PT J AU NOWAKOWSKI, VA CASTRO, JR PETTI, PL COLLIER, JM DAFTARI, I AHN, D GAUGER, G GUTIN, P LINSTADT, DE PHILLIPS, TL AF NOWAKOWSKI, VA CASTRO, JR PETTI, PL COLLIER, JM DAFTARI, I AHN, D GAUGER, G GUTIN, P LINSTADT, DE PHILLIPS, TL TI CHARGED-PARTICLE RADIOTHERAPY OF PARASPINAL TUMORS SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article; Proceedings Paper CT WORKSHOP ON POTENTIAL CLINICAL GAINS BY USE OF SUPERIOR RADIATION DOSE DISTRIBUTION CY APR 27-29, 1989 CL NCI, BETHESDA, MD HO NCI DE HIGH LET; CHARGED PARTICLE RADIOTHERAPY; PARASPINAL TUMORS ID SOFT-TISSUE SARCOMAS; RADIATION-THERAPY; CERVICAL-SPINE; CHORDOMA; CHONDROSARCOMA; EXPERIENCE; SKULL; BASE; BONE AB Between 1976 and 1987, 52 patients with tumors adjacent to and/or involving the cervical, thoracic, or lumbar spinal cord were treated with charged particles at the University of California Lawrence Berkeley Laboratory. The histologies included chordoma and chondrosarcoma (24 pts), other bone and soft tissue sarcoma (14 pts), and metastatic or unusual histology tumors (14 pts). Radiation doses ranged from 29 to 80 Gray-equivalent (GyE), with a median dose of 70 GyE. Twenty-one patients received a portion of their treatment with photons. Median followup was 28 months. For 36 previously untreated patients, local control was achieved in 21/36 patients and the 3-year actuarial survival was 61 %. Of 16 patients treated for recurrent disease, 7/16 were locally controlled and the 3-year actuarial survival was 51 %. For patients treated for chordoma and chondrosarcoma, probability of local control was influenced by tumor volume (< 100 cc or > 150 cc) and whether disease was recurrent or previously untreated. Complications occurred in 6/52 patients, including one spinal cord injury, one cauda equina and one brachial plexus injury, and three instances of skin or subcutaneous fibrosis. Charged particle radiotherapy can safely deliver high tumor doses to paraspinal tumors with good local control. C1 UNIV CALIF SAN FRANCISCO,SAN FRANCISCO,CA 94143. NO CALIF CANC CTR,BELMONT,CA. RP NOWAKOWSKI, VA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,MED CTR,BERKELEY,CA 94720, USA. FU NCI NIH HHS [CA 19138, CA 21744] NR 28 TC 26 Z9 26 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 22 IS 2 BP 295 EP 303 PG 9 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA GX876 UT WOS:A1992GX87600010 PM 1740393 ER PT J AU SIGDESTAD, CP CONNOR, AM SIMS, CS AF SIGDESTAD, CP CONNOR, AM SIMS, CS TI MODIFICATION OF NEUTRON-INDUCED HEMATOPOIETIC EFFECTS BY CHEMICAL RADIOPROTECTORS SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE NEUTRONS; FISSION SPECTRUM; RADIATION-PROTECTIVE AGENTS; RADIATION EFFECTS; MICE; ENDOGENOUS-SPLEEN-COLONY ASSAY; ETHIOFOS; CYSTAFOS; PHOSPHOROTHIOATES ID PROTECTION; WR-2721; MICE; IRRADIATION; WR-151327 AB Nine drugs, WR-347, WR-1065, WR-2529, WR-2721, WR-3689, WR-44923, WR-151327, WR-109342, and WR-168643, were assayed for intraperitoneal pharmacological toxicity, hematopoietic lethality, and spleen stem cell survival in C57/Bl mice in conjunction with whole-body fission neutron irradiation. In addition, WR-3689, WR-109342, and WR-168643 were used with per os administration to determine hematopoietic lethality. Drug toxicities after intraperitoneal administration, as determined by LD50's, ranged from 37 mg/Kg for WR-109342 to 2901 mg/Kg for WR-2529. Following oral administration drug toxicities ranged from 58 mg/Kg (WR-109342) to 1816 mg/Kg (WR-3689). Dose modification factors as determined by LD50(30)'s following intraperitoneal administration ranged from 1.08 for WR-347 to 1.49 for WR-2529. Of the drugs orally administered, WR-168643 was the best protector with a DMF of 1.51. Spleen stem cell survival, which was performed only after intraperitoneal drug administration, provided no significant differences in dose modification factors. C1 OAK RIDGE NATL LAB,DOSIMETRY APPLICAT RES GRP,OAK RIDGE,TN 37831. UNIV LOUISVILLE,SCH MED,DEPT RADIAT ONCOL,LOUISVILLE,KY 40292. NR 20 TC 9 Z9 9 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 22 IS 4 BP 807 EP 811 PG 5 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA HJ377 UT WOS:A1992HJ37700038 PM 1544854 ER PT J AU GRDINA, DJ DALE, P WEICHSELBAUM, R AF GRDINA, DJ DALE, P WEICHSELBAUM, R TI PROTECTION AGAINST AZT-INDUCED MUTAGENESIS AT THE HGPRT LOCUS IN A HUMAN CELL-LINE BY WR-151326 SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article; Proceedings Paper CT 7TH INTERNATIONAL CONF ON CHEMICAL MODIFIERS OF CANCER TREATMENT CY FEB 02-05, 1991 CL CLEARWATER, FL DE AZT; WR-151326; HGPRT; ANTIMUTAGEN ID CHEMOTHERAPY AB The anti-AIDS agent, AZT (3'-azido-3'-deoxythymidine), is mutagenic in a cultured human hepatoma cell line designated HepG2 at the HGPRT (hypoxanthine-guanine phosphoribosyl transferase) locus. Using an exposure time of 3hr, the number of mutants per 10(6) surviving cells increased as a function of AZT dose from 125 to 520. Chinese hamster ovary cells, in contrast, are not affected with respect to this endpoint when similar concentrations of AZT are used (i.e., 0.1 to 10 mg/ml). The aminothiol WR-151326 13-(3-methylaminopropylamino) propanethiol dihydrochloride] was evaluated as a possible antimutagen for use with AZT. At a concentration of 4 mM, WR-151326 was added either concomitantly or following exposure of HepG2 cells to a 5 mg/ml concentration of AZT. Regardless of the treatment condition, WR-151326 was effective in reducing the mutagenic effects of AZT by about a factor of 2. Correcting for background mutations, the mutation frequencies determined were: AZT only for 3 hr, 110 X 10(-6) (S.E.M. +/- 6.0 X 10(-6)); AZT together with WR-151326 for 3 hr, 57 X 10(6) (S.E.M. +/- 3.0 x 10(6)); and AZT for 3 hr followed by WR-151326 for 3 hr, 68 X 10(-6)(S.E.M. +/- 5.0 X 10(-6)). This study demonstrates that AZT is mutagenic to a cell line of human origin and that WR-151326 can protect against this mutagenic process. C1 UNIV CHICAGO,DEPT RADIAT & CELLULAR ONCOL,CHICAGO,IL 60637. RP GRDINA, DJ (reprint author), ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439, USA. FU NCI NIH HHS [CA-37435] NR 11 TC 22 Z9 22 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PY 1992 VL 22 IS 4 BP 813 EP 815 PG 3 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA HJ377 UT WOS:A1992HJ37700039 PM 1544855 ER PT J AU ODOWD, NP SHIH, CF STOUT, MG AF ODOWD, NP SHIH, CF STOUT, MG TI TEST GEOMETRIES FOR MEASURING INTERFACIAL FRACTURE-TOUGHNESS SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article ID MIXED-MODE FRACTURE; BRAZILIAN DISK TEST; BIMATERIAL INTERFACES; CRACKS AB Two types of test specimen for determining interfacial fracture toughness are calibrated in this paper. Previous studies have shown that interfacial fracture toughness is strongly dependent on mode mixity. Both specimen types presented are well-suited for investigating interfacial toughness over a wide range of mode mixities. The structure of the near tip elastic fields for an interface crack is examined and in particular near tip contact and the variation of mode mixity with distance are dealt with. The concept of K dominance for interface cracks is discussed and a zone of K dominance is shown to exist for the specimens calibrated, provided the zone of non-linear effects is small. A procedure for determining the effect of residual stresses on the stress intensity factor is presented. C1 UNIV CALIF LOS ALAMOS SCI LAB,PHYS MET GRP,LOS ALAMOS,NM 87545. RP ODOWD, NP (reprint author), BROWN UNIV,DIV ENGN,PROVIDENCE,RI 02912, USA. RI O'Dowd, Noel/B-6588-2008; MA&BE, Department/A-5579-2012; Irish Centre for Composites, Research (ICOMP)/D-4887-2011 OI O'Dowd, Noel/0000-0001-5717-8561; NR 20 TC 86 Z9 89 U1 1 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PY 1992 VL 29 IS 5 BP 571 EP 589 DI 10.1016/0020-7683(92)90055-X PG 19 WC Mechanics SC Mechanics GA GT965 UT WOS:A1992GT96500004 ER PT J AU CHRISTENSEN, RM DETERESA, SJ AF CHRISTENSEN, RM DETERESA, SJ TI ELIMINATION MINIMIZATION OF EDGE-INDUCED STRESS SINGULARITIES IN FIBER COMPOSITE LAMINATES SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article ID FAILURE AB The stress singularities along the edges of a linear elastic laminate consisting of 0-degrees and off-axis plies in uniaxial stress are shown to either vanish or be minimized by a special fiber orientation for the off-axis plies. The particular orientation is obtained analytically using both a recently proposed specific three-dimensional constitutive equation and the more general constitutive theory, but for fiber-dominated lamina. The prescribed angle is defined by the simple relationship: theta* = tan-1(1/square-root nu(L)), where nu(L) is the longitudinal Poisson's ratio of the lamina. Tensile test data are consistent with the theoretical result. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV MAT,LIVERMORE,CA 94550. RP CHRISTENSEN, RM (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT APPL SCI,LIVERMORE,CA 94550, USA. NR 12 TC 8 Z9 8 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PY 1992 VL 29 IS 10 BP 1221 EP 1231 DI 10.1016/0020-7683(92)90233-J PG 11 WC Mechanics SC Mechanics GA HF744 UT WOS:A1992HF74400003 ER PT J AU FORRESTAL, MJ LUK, VK ROSENBERG, Z BRAR, NS AF FORRESTAL, MJ LUK, VK ROSENBERG, Z BRAR, NS TI PENETRATION OF 7075-T651 ALUMINUM TARGETS WITH OGIVAL-NOSE RODS SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article AB We developed analytical models that predicted forces and penetration depths for long, rigid rods with ogival noses and rate-independent, strain-hardening targets. To verify our models, we conducted terminal-ballistic experiments with 7.1 mm diameter, 0.025 kg, 3.0 caliber-radius-head, ogival-nose rods and 152 mm diameter, 7075-T651 aluminum cylindrical targets. The model predicted penetration depths in good agreement with the data for impact velocities between 370 and 1260 m s-1. C1 UNIV DAYTON,RES INST,DAYTON,OH 45469. RP FORRESTAL, MJ (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 7 TC 45 Z9 52 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PY 1992 VL 29 IS 14-15 BP 1729 EP 1736 DI 10.1016/0020-7683(92)90166-Q PG 8 WC Mechanics SC Mechanics GA HT681 UT WOS:A1992HT68100007 ER PT J AU GATHERS, GR AF GATHERS, GR TI ERROR ANALYSIS OF A RATIO PYROMETER BY NUMERICAL-SIMULATION SO INTERNATIONAL JOURNAL OF THERMOPHYSICS LA English DT Article; Proceedings Paper CT 2ND WORKSHOP ON SUBSECOND THERMOPHYSICS CY SEP 20-21, 1990 CL CNR, IST METROL GUSTAVO COLONNETTI, TORINO, ITALY HO CNR, IST METROL GUSTAVO COLONNETTI DE HIGH TEMPERATURES; PYROMETRY; RATIO PYROMETER; TEMPERATURE MEASUREMENT ID SHOCK-TEMPERATURE-MEASUREMENTS AB A numerical method has been devised to evaluate measurement errors for a three-channel ratio pyrometer as a function of temperature. The pyrometer is simulated by computer codes, which can be used to explore the behavior of various designs. The influence of the various components in the system can be evaluated. General conclusions can be drawn about what makes a good pyrometer, and an existing pyrometer was evaluated, to predict its behavior as a function of temperature. The results show which combination of two channels gives the best precision. RP GATHERS, GR (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 13 TC 3 Z9 3 U1 1 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-928X J9 INT J THERMOPHYS JI Int. J. Thermophys. PD JAN PY 1992 VL 13 IS 1 BP 173 EP 185 DI 10.1007/BF00503365 PG 13 WC Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied SC Thermodynamics; Chemistry; Mechanics; Physics GA GY112 UT WOS:A1992GY11200016 ER PT J AU GATHERS, GR AF GATHERS, GR TI ERROR ANALYSIS BY NUMERICAL-SIMULATION FOR A 3-COLOR PYROMETER ASSUMING A BLACKBODY SPECTRUM AND A WAVELENGTH-DEPENDENT AND TEMPERATURE-DEPENDENT EMISSIVITY SO INTERNATIONAL JOURNAL OF THERMOPHYSICS LA English DT Article; Proceedings Paper CT 2ND WORKSHOP ON SUBSECOND THERMOPHYSICS CY SEP 20-21, 1990 CL CNR, IST METROL GUSTAVO COLONNETTI, TORINO, ITALY HO CNR, IST METROL GUSTAVO COLONNETTI DE HIGH TEMPERATURES; MULTIWAVELENGTH PYROMETER; PYROMETRY; TEMPERATURE MEASUREMENTS AB A numerical method devised to test ratio pyrometers has been used to explore the fitting of a blackbody spectrum and an emissivity model that assumes linear wavelength dependence and arbitrary temperature dependence. The slope and intercept coefficients for the emissivity and the temperature form three unknowns. The equations for the output of the three channels can be solved simultaneously for the emissivity coefficients and the temperature at any given time using the corresponding measured channel outputs. The stability of the solution is tested as a function of the temperature and equipment characteristics. RP GATHERS, GR (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 9 TC 1 Z9 1 U1 1 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-928X J9 INT J THERMOPHYS JI Int. J. Thermophys. PD JAN PY 1992 VL 13 IS 1 BP 187 EP 198 DI 10.1007/BF00503366 PG 12 WC Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied SC Thermodynamics; Chemistry; Mechanics; Physics GA GY112 UT WOS:A1992GY11200017 ER PT B AU GARRETT, JD AF GARRETT, JD BE Bruandet, JF Fernandez, B Bex, M TI EXOTIC NUCLEAR SHAPES AND CONFIGURATIONS THAT CAN BE STUDIED AT HIGH-SPIN USING RADIOACTIVE ION-BEAMS SO INTERNATIONAL WORKSHOP ON THE PHYSICS AND TECHNIQUES OF SECONDARY NUCLEAR BEAMS LA English DT Proceedings Paper CT International Workshop on the Physics and Techniques of Secondary Nuclear Beams CY MAR 23-25, 1992 CL DOURDAN, FRANCE SP CNRS, INST NATL PHYS NUCL & PHYS PARTICULES, CEA, DIV SCI MAT C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-121-8 PY 1992 BP 3 EP 28 PG 26 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BB01R UT WOS:A1992BB01R00001 ER PT B AU GARRETT, JD AF GARRETT, JD BE Bruandet, JF Fernandez, B Bex, M TI NORTH-AMERICAN RADIOACTIVE BEAM INITIATIVES SO INTERNATIONAL WORKSHOP ON THE PHYSICS AND TECHNIQUES OF SECONDARY NUCLEAR BEAMS LA English DT Proceedings Paper CT International Workshop on the Physics and Techniques of Secondary Nuclear Beams CY MAR 23-25, 1992 CL DOURDAN, FRANCE SP CNRS, INST NATL PHYS NUCL & PHYS PARTICULES, CEA, DIV SCI MAT C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-121-8 PY 1992 BP 311 EP 325 PG 15 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BB01R UT WOS:A1992BB01R00018 ER PT J AU WIRICK, CD AF WIRICK, CD TI HERBIVORES AND THE SPATIAL DISTRIBUTIONS OF THE PHYTOPLANKTON .3. ESTIMATING THE NUMBER OF GOOD FORAGING PLACES SO INTERNATIONALE REVUE DER GESAMTEN HYDROBIOLOGIE LA English DT Article DE PHYTOPLANKTON; MODEL; HERBOVIRE; CRITICAL PERIOD ID CHLOROPHYLL; SCALES; FOOD AB During critical periods, the survival of a herbivorous zooplankter or ichthyoplankter may depend upon the animal encountering food in excess of a critical concentration. During such times, the value of the animal's habitat is related to the relative number of places where food exceeds the critical concentration. CHEBYSHEV's mathematical inequality gives a nonparametric upper bound for the probability that a place selected at random from a habitat will contain such excess food. The probability is proportional to the sum of the variance and mean squared of the food distribution, which is also a measure of the habitat's value to the animal. RP WIRICK, CD (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV OCEANOG & ATMOSPHER SCI,UPTON,NY 11973, USA. NR 25 TC 1 Z9 1 U1 0 U2 0 PU AKADEMIE VERLAG GMBH PI BERLIN PA MUHLENSTRASSE 33-34, D-13187 BERLIN, GERMANY SN 0020-9309 J9 INT REV GES HYDROBIO JI Int. Rev. Gesamten Hydrobiol. PY 1992 VL 77 IS 3 BP 361 EP 377 DI 10.1002/iroh.19920770303 PG 17 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA JU358 UT WOS:A1992JU35800002 ER PT B AU LIU, JC SIMS, CS AF LIU, JC SIMS, CS GP INT RADIAT PROTECT ASSOC TI HIGH TEMPERATURE PEAK CHARACTERISTICS OF THE READER-ANNEALED TLD-600 AND ITS APPLICATION TO PERSONNEL PROTECTION DOSIMETRY IN MIXED NEUTRON-PHOTON FIELD SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 90 EP 97 PG 8 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00018 ER PT B AU IPE, NE LIU, JC AF IPE, NE LIU, JC GP INT RADIAT PROTECT ASSOC TI HIGH LEVEL DOSIMETRY AT THE STANFORD LINEAR ACCELERATOR CENTER SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 102 EP 107 PG 6 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00020 ER PT B AU KENNEDY, RA MAHAFFEY, JA SMITH, SK CARR, F AF KENNEDY, RA MAHAFFEY, JA SMITH, SK CARR, F GP INT RADIAT PROTECT ASSOC TI UNITED-STATES DEPARTMENT OF ENERGY CHERNOBYL DATABASES SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 265 EP 268 PG 4 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00062 ER PT B AU MCDONALD, JC HERTEL, NE AF MCDONALD, JC HERTEL, NE GP INT RADIAT PROTECT ASSOC TI CALIBRATION OF PERSONAL DOSEMETERS IN TERMS OF THE ICRU OPERATIONAL QUANTITIES SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 281 EP 284 PG 4 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00066 ER PT B AU GREENHOUSE, NA AF GREENHOUSE, NA GP INT RADIAT PROTECT ASSOC TI IS TRACK-ETCH DOSIMETRY READY FOR NEUTRON PERSONAL DOSIMETRY AT HIGH ENERGY ACCELERATORS SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 338 EP 338 PG 1 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00081 ER PT B AU FIX, JJ GILBERT, ES AF FIX, JJ GILBERT, ES GP INT RADIAT PROTECT ASSOC TI CONSISTENCY OF EXTERNAL DOSIMETRY IN EPIDEMIOLOGIC STUDIES OF NUCLEAR WORKERS SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 567 EP 570 PG 4 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00141 ER PT B AU VOELZ, GL WIGGS, LD GALKE, WA AF VOELZ, GL WIGGS, LD GALKE, WA GP INT RADIAT PROTECT ASSOC TI EPIDEMIOLOGY OF PLUTONIUM WORKERS SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL I LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-657-8 PY 1992 BP 714 EP 717 PG 4 WC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Public, Environmental & Occupational Health; Instruments & Instrumentation; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BC18J UT WOS:A1992BC18J00179 ER PT B AU BAIR, WJ AF BAIR, WJ GP INT RADIAT PROTECT ASSOC TI THE REVISED INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION (ICRP) DOSIMETRIC MODEL FOR THE HUMAN RESPIRATORY TRACT SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 1 U2 1 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1053 EP 1056 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00005 ER PT B AU JOHNSON, JR JAMES, AC HILL, RL AF JOHNSON, JR JAMES, AC HILL, RL GP INT RADIAT PROTECT ASSOC TI APPLICATION OF THE PROPOSED NEW ICRP LUNG MODEL TO BIOASSAY SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1093 EP 1096 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00014 ER PT B AU BROOKS, BG AF BROOKS, BG GP INT RADIAT PROTECT ASSOC TI THE ROLE OF CEDR IN WORKER HEALTH PROTECTION SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,OFF ASSISTANT SECRETARY ENVIRONM SAFETY & HLTH,WASHINGTON,DC 20585. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1157 EP 1157 PG 1 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00030 ER PT B AU ZIEMER, PL AF ZIEMER, PL GP INT RADIAT PROTECT ASSOC TI THE DEPARTMENT OF ENERGY TIGER TEAMS - ANALYSIS OF FINDINGS AND PLANS FOR THE FUTURE SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,WASHINGTON,DC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1205 EP 1205 PG 1 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00042 ER PT B AU ZIEMER, PL WEINER, LA AF ZIEMER, PL WEINER, LA GP INT RADIAT PROTECT ASSOC TI THE DEPARTMENT OF ENERGY TIGER TEAM ANALYSIS - ANALYSIS FINDINGS AND PLANS FOR THE FUTURE SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,WASHINGTON,DC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1206 EP 1209 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00043 ER PT B AU KOCHER, DC HOFFMAN, FO AF KOCHER, DC HOFFMAN, FO GP INT RADIAT PROTECT ASSOC TI A PROPOSED FRAMEWORK FOR CONSISTENT REGULATION OF PUBLIC EXPOSURES TO RADIONUCLIDES AND OTHER CARCINOGENS SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1214 EP 1217 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00045 ER PT B AU WEADOCK, AA JONES, CR AF WEADOCK, AA JONES, CR GP INT RADIAT PROTECT ASSOC TI OPTIMIZATION (ALARA) OF RADIATION PROTECTION AT DEPARTMENT OF ENERGY FACILITIES SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,OFF HLTH PHYS,WASHINGTON,DC 20585. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1233 EP 1236 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00050 ER PT B AU CUMMINGS, FM CARLSON, RD GESELL, TF LOESCH, RM AF CUMMINGS, FM CARLSON, RD GESELL, TF LOESCH, RM GP INT RADIAT PROTECT ASSOC TI THE UNITED-STATES DEPARTMENT-OF-ENERGY LABORATORY ACCREDITATION PROGRAM FOR TESTING THE PERFORMANCE OF EXTREMITY DOSIMETRY SYSTEMS - A SUMMARY OF THE PROGRAM STATUS SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,IDAHO FALLS,ID. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1246 EP 1250 PG 5 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00054 ER PT B AU DENHAM, DH PRICE, KR AF DENHAM, DH PRICE, KR GP INT RADIAT PROTECT ASSOC TI DETECTION AND DIFFERENTIATION OF CONTAMINATION THROUGH A COMPARISON OF OBSERVED LEVELS IN HISTORICAL ENVIRONMENTAL SAMPLING DATA SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1262 EP 1265 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00059 ER PT B AU SUN, LC MEINHOLD, CB MOORTHY, AR CLINTON, JH KAPLAN, E AF SUN, LC MEINHOLD, CB MOORTHY, AR CLINTON, JH KAPLAN, E GP INT RADIAT PROTECT ASSOC TI RADIOLOGICAL DOSE ASSESSMENTS IN THE NORTHERN MARSHALL-ISLANDS (1989-1991) SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 BROOKHAVEN NATL LAB,DEPT NUCL ENERGY,DIV RADIOL SCI,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1320 EP 1323 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00074 ER PT B AU LOWDER, WM HAJNAL, F AF LOWDER, WM HAJNAL, F GP INT RADIAT PROTECT ASSOC TI EXPOSURE TO COSMIC RADIATION - A DEVELOPING MAJOR PROBLEM IN RADIATION PROTECTION SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,ENVIRONM MEASUREMENT LAB,NEW YORK,NY 10014. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1557 EP 1557 PG 1 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00133 ER PT B AU HAJNAL, F WILSON, J AF HAJNAL, F WILSON, J GP INT RADIAT PROTECT ASSOC TI HIGH-ALTITUDE COSMIC RAY NEUTRONS - PROBABLE SOURCE FOR THE HIGH-ENERGY PROTONS OF THE EARTHS RADIATION BELTS SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 US DOE,ENVIRONM MEASUREMENTS LAB,NEW YORK,NY 10014. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1620 EP 1620 PG 1 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00148 ER PT B AU PARKS, CV BROADHEAD, BL BRADY, MC AF PARKS, CV BROADHEAD, BL BRADY, MC GP INT RADIAT PROTECT ASSOC TI STATUS OF SHIELDING ANALYSIS METHODS FOR TRANSPORT PACKAGES SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1650 EP 1653 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00156 ER PT B AU WADMAN, W ANDREWS, L AF WADMAN, W ANDREWS, L GP INT RADIAT PROTECT ASSOC TI STANDARDIZED RADIOLOGICAL HAZARD ANALYSIS FOR A BROAD BASED OPERATIONAL SAFETY PROGRAM SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 LOS ALAMOS NATL LAB,DIV HLTH & SAFETY,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1662 EP 1666 PG 5 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00159 ER PT B AU MCDOWELLBOYER, LM AF MCDOWELLBOYER, LM GP INT RADIAT PROTECT ASSOC TI LONG-TERM UNCERTAINTY IN RADIOLOGICAL PERFORMANCE ASSESSMENTS OF LOW-LEVEL WASTE FACILITIES AT THE SAVANNAH RIVER SITE SO IRPA8 - EIGHTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION - WORLDWIDE ACHIEVEMENT IN PUBLIC AND OCCUPATIONAL HEALTH PROTECTION AGAINST RADIATION, VOL II LA English DT Proceedings Paper CT 8th International Congress of the International-Radiation-Protection-Association - Worldwide Achievement in Public and Occupational Health Protection Against Radiation CY MAY 17-22, 1992 CL MONTREAL, CANADA SP INT RADIAT PROTECT ASSOC, CANADIAN RADIAT PROTECT ASSOC C1 OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT RADIATION PROTECTION ASSOC PI MONTREAL PA 2155 RUE GUY, BUREAU 820, MONTREAL PQ H3H 2R9, CANADA BN 1-55048-658-6 PY 1992 BP 1781 EP 1784 PG 4 WC Engineering, Environmental; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BC18K UT WOS:A1992BC18K00190 ER PT B AU WAGNER, AF HARDING, LB AF WAGNER, AF HARDING, LB BE KAYE, JA TI ISOTOPE EFFECTS IN ADDITION-REACTIONS OF IMPORTANCE IN COMBUSTION THEORETICAL-STUDIES OF THE REACTIONS CH+H2-REVERSIBLE-ARROW-CH3-ASTERISK-REVERSIBLE-ARROW-CH2+H SO ISOTOPE EFFECTS IN GAS-PHASE CHEMISTRY SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP ON ISOTOPE EFFECTS IN GAS-PHASE CHEMISTRY, AT THE 201ST NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC CY APR 14-19, 1991 CL ATLANTA, GA SP AMER CHEM SOC, DIV PHYS CHEM RP WAGNER, AF (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 0 TC 9 Z9 9 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-2471-4 J9 ACS SYM SER PY 1992 VL 502 BP 48 EP 63 PG 16 WC Chemistry, Physical; Geosciences, Multidisciplinary; Physics, Atomic, Molecular & Chemical SC Chemistry; Geology; Physics GA BW92N UT WOS:A1992BW92N00004 ER PT B AU MICHAEL, JV AF MICHAEL, JV BE KAYE, JA TI ISOTOPE EFFECTS AT HIGH-TEMPERATURES STUDIED BY THE FLASH OR LASER PHOTOLYSIS - SHOCK-TUBE TECHNIQUE SO ISOTOPE EFFECTS IN GAS-PHASE CHEMISTRY SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP ON ISOTOPE EFFECTS IN GAS-PHASE CHEMISTRY, AT THE 201ST NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC CY APR 14-19, 1991 CL ATLANTA, GA SP AMER CHEM SOC, DIV PHYS CHEM RP MICHAEL, JV (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Michael, Joe/E-3907-2010 NR 0 TC 4 Z9 4 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-2471-4 J9 ACS SYM SER PY 1992 VL 502 BP 80 EP 93 PG 14 WC Chemistry, Physical; Geosciences, Multidisciplinary; Physics, Atomic, Molecular & Chemical SC Chemistry; Geology; Physics GA BW92N UT WOS:A1992BW92N00006 ER PT B AU CARMAN, HS KLOTS, CE COMPTON, RN AF CARMAN, HS KLOTS, CE COMPTON, RN BE KAYE, JA TI NEGATIVE-ION FORMATION BY RYDBERG ELECTRON-TRANSFER - ISOTOPE-DEPENDENT RATE CONSTANTS SO ISOTOPE EFFECTS IN GAS-PHASE CHEMISTRY SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP ON ISOTOPE EFFECTS IN GAS-PHASE CHEMISTRY, AT THE 201ST NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC CY APR 14-19, 1991 CL ATLANTA, GA SP AMER CHEM SOC, DIV PHYS CHEM RP CARMAN, HS (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,CHEM PHYS SECT,OAK RIDGE,TN 37831, USA. NR 0 TC 3 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-2471-4 J9 ACS SYM SER PY 1992 VL 502 BP 181 EP 192 PG 12 WC Chemistry, Physical; Geosciences, Multidisciplinary; Physics, Atomic, Molecular & Chemical SC Chemistry; Geology; Physics GA BW92N UT WOS:A1992BW92N00012 ER PT J AU PINES, A AF PINES, A TI SOLID-STATE NMR - SOME PERSONAL RECOLLECTIONS SO ISRAEL JOURNAL OF CHEMISTRY LA English DT Editorial Material C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP PINES, A (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU LASER PAGES PUBL LTD PI JERUSALEM PA PO BOX 50257, JERUSALEM 91502, ISRAEL SN 0021-2148 J9 ISRAEL J CHEM JI Isr. J. Chem. PY 1992 VL 32 IS 2-3 BP 137 EP 144 PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA KT517 UT WOS:A1992KT51700003 ER PT J AU FRYDMAN, L CHINGAS, GC LEE, YK GRANDINETTI, PJ EASTMAN, MA BARRALL, GA PINES, A AF FRYDMAN, L CHINGAS, GC LEE, YK GRANDINETTI, PJ EASTMAN, MA BARRALL, GA PINES, A TI CORRELATION OF ISOTROPIC AND ANISOTROPIC CHEMICAL-SHIFTS IN SOLIDS BY 2-DIMENSIONAL VARIABLE-ANGLE-SPINNING NMR SO ISRAEL JOURNAL OF CHEMISTRY LA English DT Article ID MAGIC-ANGLE AB We describe a new solid-state nuclear magnetic resonance (NMR) technique for correlating anisotropic and isotropic chemical shifts in powdered samples. Two-dimensional (2D) NMR spectra are obtained by processing signals acquired in independent experiments for different angles between the sample spinning axis and the Zeeman magnetic field. This 2D NMR approach can therefore resolve individual static anisotropic lineshapes according to their isotropic chemical shift frequencies, without use of sudden mechanical motions or multiple-pulse irradiation schemes. Applications of the technique are illustrated with an analysis of the chemical shift anisotropy for the eight distinct C-13 sites in tyrosine. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Grandinetti, Philip/F-1084-2010 OI Grandinetti, Philip/0000-0003-0102-316X NR 19 TC 31 Z9 32 U1 0 U2 5 PU LASER PAGES PUBL LTD PI JERUSALEM PA PO BOX 50257, JERUSALEM 91502, ISRAEL SN 0021-2148 J9 ISRAEL J CHEM JI Isr. J. Chem. PY 1992 VL 32 IS 2-3 BP 161 EP 164 PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA KT517 UT WOS:A1992KT51700005 ER PT J AU ZAWODZINSKI, TA SPRINGER, TE NEEMAN, M SILLERUD, LO AF ZAWODZINSKI, TA SPRINGER, TE NEEMAN, M SILLERUD, LO TI DIFFUSION-BARRIERS IN PULSED-GRADIENT SPIN-ECHO NMR MICROSCOPY SO ISRAEL JOURNAL OF CHEMISTRY LA English DT Article ID MAGNETIC-RESONANCE MICROSCOPY; RESTRICTED DIFFUSION; LIMITED RESOLUTION; SELF-DIFFUSION; WATER; COEFFICIENTS AB Diffusion barrier effects on diffusion and flow mapping by NMR microscopy were simulated for the general case of an interface between two compartments with different relaxation properties and diffusion coefficients. The extreme case of a completely impermeable barrier (i.e. a glass wall) shows substantial changes in signal intensity and phase at distances of a few micrometers from the surface. Permeable boundaries show varying degrees of intensity and phase changes that can be used for deducing permeability properties of barriers that would otherwise be below the true spatial resolution of the image. The simulations were done for the case of a solid, water-imbibing polymer immersed in water and for water diffusion between intra- and extracellular compartments across a biological membrane. These specific boundary effects have substantial implications for the determination of image resolution and for the separation and measurement of coherent flow and random diffusion. RP ZAWODZINSKI, TA (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. RI Neeman, Michal/A-8264-2008 OI Neeman, Michal/0000-0002-6296-816X NR 26 TC 7 Z9 7 U1 0 U2 3 PU LASER PAGES PUBL LTD PI JERUSALEM PA PO BOX 50257, JERUSALEM 91502, ISRAEL SN 0021-2148 J9 ISRAEL J CHEM JI Isr. J. Chem. PY 1992 VL 32 IS 2-3 BP 281 EP 289 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA KT517 UT WOS:A1992KT51700018 ER PT J AU BOWMAN, MK AF BOWMAN, MK TI COHERENT RAMAN BEAT DETECTION OF NUCLEAR COHERENCES - AN ALTERNATIVE TO ELECTRON-SPIN ECHO ENVELOPE MODULATION SO ISRAEL JOURNAL OF CHEMISTRY LA English DT Article ID RESONANCE AB The use of coherent Raman beats for the detection of nuclear coherences in solids from nuclei with hyperfine couplings to unpaired electron spins is discussed. The coherent Raman beats do not require refocusing of the electron spins and therefore are not strongly affected by spectral diffusion of the electron spins. Several methods for generating nuclear coherences using a single microwave pulse, two microwave pulses, or a combination of microwave and radiofrequency pulses are discussed. One-dimensional and two-dimensional spectroscopies for the measurement of hyperfine interactions in solids are proposed. RP BOWMAN, MK (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 NR 33 TC 27 Z9 27 U1 0 U2 1 PU LASER PAGES PUBL LTD PI JERUSALEM PA PO BOX 50257, JERUSALEM 91502, ISRAEL SN 0021-2148 J9 ISRAEL J CHEM JI Isr. J. Chem. PY 1992 VL 32 IS 2-3 BP 339 EP 349 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA KT517 UT WOS:A1992KT51700023 ER PT J AU BIXON, M FAJER, J FEHER, G FREED, JH GAMLIEL, D HOFF, AJ LEVANON, H MOBIUS, K NECHUSHTAI, R NORRIS, JR SCHERZ, A SESSLER, JL STEHLIK, D AF BIXON, M FAJER, J FEHER, G FREED, JH GAMLIEL, D HOFF, AJ LEVANON, H MOBIUS, K NECHUSHTAI, R NORRIS, JR SCHERZ, A SESSLER, JL STEHLIK, D TI PRIMARY EVENTS IN PHOTOSYNTHESIS - PROBLEMS, SPECULATIONS, CONTROVERSIES, AND FUTURE-TRENDS SO ISRAEL JOURNAL OF CHEMISTRY LA English DT Review ID RHODOBACTER-SPHAEROIDES R-26; BACTERIAL REACTION CENTERS; ELECTRON-PARAMAGNETIC RESONANCE; PRIMARY CHARGE SEPARATION; LIGHT-HARVESTING COMPLEX; CORRELATED RADICAL PAIRS; DETECTED MAGNETIC-RESONANCE; COVALENTLY LINKED PORPHYRIN; PROTEIN COFACTOR QUINONES; VIRIDIS REACTION CENTERS C1 CORNELL UNIV, DEPT CHEM, ITHACA, NY 14853 USA. FREE UNIV BERLIN, INST EXPTL PHYS, W-1000 BERLIN 33, GERMANY. TEL AVIV UNIV, SCH CHEM, IL-69978 TEL AVIV, ISRAEL. BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. UNIV CALIF SAN DIEGO, DEPT PHYS, LA JOLLA, CA 92093 USA. HEBREW UNIV JERUSALEM, FARKAS CTR LIGHT INDUCED PROC, IL-91904 JERUSALEM, ISRAEL. LEIDEN UNIV, HUYGENS LAB, 2312 AV LEIDEN, NETHERLANDS. HEBREW UNIV JERUSALEM, DEPT BOT, IL-91904 JERUSALEM, ISRAEL. ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. WEIZMANN INST SCI, DEPT BIOCHEM, IL-76100 REHOVOT, ISRAEL. UNIV TEXAS, DEPT CHEM & BIOCHEM, AUSTIN, TX 78712 USA. RP HEBREW UNIV JERUSALEM, INST ADV STUDIES, IL-91904 JERUSALEM, ISRAEL. RI Feher, George/E-3050-2010 NR 825 TC 11 Z9 11 U1 0 U2 2 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA POSTFACH 101161, 69451 WEINHEIM, GERMANY SN 0021-2148 EI 1869-5868 J9 ISR J CHEM JI Isr. J. Chem. PY 1992 VL 32 IS 4 BP U369 EP 518 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KT697 UT WOS:A1992KT69700001 ER PT J AU NELSON, GW PERELSON, AS AF NELSON, GW PERELSON, AS TI A MECHANISM OF IMMUNE ESCAPE BY SLOW-REPLICATING HIV STRAINS SO JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES AND HUMAN RETROVIROLOGY LA English DT Article DE IMMUNE ESCAPE; HIV; SLOW REPLICATION ID HUMAN-IMMUNODEFICIENCY-VIRUS; HTLV-III LAV; LYMPHOCYTE-PROLIFERATION; ENVELOPE GLYCOPROTEIN; T-CELLS; INFECTION; TYPE-1; PATHOGENESIS; AIDS; EXPRESSION AB Strains of human immunodeficiency virus (HIV) differ greatly in their ability to replicate in T4 cells. Fast-replicating strains are observed during the early and late stages of HIV infection, while slow-replicating strains prevail during the intermediate, latent, stage. The prevalence of slow-replicating strains has been attributed to these strains' ability to escape the immune response. However, how these strains are able to avoid being eliminated by an immune response for several years has not been explained. Recent experiments indicate that HIV may be selectively transferred from infected macrophages to T4 cells specific for HIV antigens. Thus, HIV may preferentially infect those T4 cells necessary for generating a protective immune response. To determine the conditions under which an HIV-specific immune response can be blocked, we developed a mathematical model incorporating the process of viral transfer from infected macrophages to HIV-specific T4 cells along with the known processes of macrophage-T4 interaction, immune stimulation, and viral infection of T4 cells and macrophages. Our model shows that the mechanism of viral transfer to HIV-specific T4 cells can allow slow-replicating strains of HIV to escape immune response under conditions in which an immune response occurs against fast-replicating strains. The model also suggests that in addition to slow replication, the ability to reduce or block T-cell activation may be an important characteristic of escape mutants. C1 UNIV CALIF LOS ALAMOS SCI LAB,GRP T-10,MAIL STOP K710,LOS ALAMOS,NM 87545. FU NIAID NIH HHS [AI28433] NR 60 TC 19 Z9 19 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 1077-9450 J9 J ACQ IMMUN DEF SYND JI J. Acquir. Immune Defic. Syndr. Hum. Retrovirol. PD JAN PY 1992 VL 5 IS 1 BP 82 EP 93 PG 12 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA GW913 UT WOS:A1992GW91300014 PM 1346634 ER PT J AU WILSON, MS GOTTESFELD, S AF WILSON, MS GOTTESFELD, S TI THIN-FILM CATALYST LAYERS FOR POLYMER ELECTROLYTE FUEL-CELL ELECTRODES SO JOURNAL OF APPLIED ELECTROCHEMISTRY LA English DT Article ID WATER ELECTROLYSIS; DIFFUSION; PLATINUM; OXYGEN AB New structures for the Pt/C catalyst layer of polymer electrolyte fuel cell electrodes have been developed that substantially increase the utilization efficiency of the catalyst. Fabricating the catalyst layers and gas diffusion backings separately makes it possible to formulate each structure with the properties that are most suitable for its function. In the case of catalyst layer, the optimal properties are hydrophilicity, thinness, uniformity, and the proper ratio of ionomer and supported catalyst. The catalyst layers are cast from solution as thin films that utilize the ionomer itself as a binder. The thin films are hot pressed directly onto the ionomer membranes, and the hydrophobic gas diffusion backings are inserted when the cells are assembled. The performances of fuel cells based on the thin film catalyst layers are comparable with those of gas diffusion electrode designs that utilize several times as much platinum, thus the specific activities of the Pt catalysts in the new structures are significantly higher. RP WILSON, MS (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,ELECTR RES GRP,LOS ALAMOS,NM 87545, USA. NR 13 TC 664 Z9 690 U1 11 U2 137 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0021-891X J9 J APPL ELECTROCHEM JI J. Appl. Electrochem. PD JAN PY 1992 VL 22 IS 1 BP 1 EP 7 DI 10.1007/BF01093004 PG 7 WC Electrochemistry SC Electrochemistry GA GY945 UT WOS:A1992GY94500001 ER PT J AU CITES, J SANGHADASA, MFM SUNG, CC REDDICK, RC WARMACK, RJ FERRELL, TL AF CITES, J SANGHADASA, MFM SUNG, CC REDDICK, RC WARMACK, RJ FERRELL, TL TI ANALYSIS OF PHOTON SCANNING TUNNELING MICROSCOPE IMAGES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID OPTICAL MICROSCOPY AB Photon scanning tunneling microscope (PSTM) images are made by scanning an optically conducting probe tip in an evanescent field above a sample surface. These images contain a mixture of topographical information, scattering effects, and variations in optical properties across the sample. Proper interpretation of PSTM images is therefore dependent upon knowledge of the field-surface interactions giving rise to these features. The subject of this work is the calculation of PSTM image features arising from the topography of the sample surface. Image features of a model sinusoidal grating structure are calculated using small perturbation theory. Image amplitudes are shown to depend on the sample orientation and the shape and position of the probe tip. The calculated results are compared with actual PSTM images of a holographically produced sinusoidal grating surface. C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37830. RP CITES, J (reprint author), UNIV ALABAMA,DEPT PHYS,HUNTSVILLE,AL 35899, USA. NR 6 TC 26 Z9 27 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 7 EP 10 DI 10.1063/1.350650 PG 4 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500002 ER PT J AU OZTURK, N WILLIAMSON, W ANTOLAK, AJ AF OZTURK, N WILLIAMSON, W ANTOLAK, AJ TI ELASTIC-SCATTERING OF ELECTRONS AND POSITRONS BY BOUND PHOSPHORUS, INDIUM, AND ANTIMONY ATOMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Elastic differential and total cross sections of electrons and positrons scattered by bound phosphorus, indium, and antimony atoms have been calculated using the method of partial waves. The interaction potential consists of an electrostatic potential, a Buckingham-type polarization potential, and, in case of electron impact, the Mittleman-Watson exchange potential. The incident energies range from a few eV to 10 keV. A parameterization of the computed partial-wave total cross sections in terms of the screened Rutherford total cross section is presented. C1 SANDIA NATL LABS,DIV THEORET,LIVERMORE,CA 94551. RP OZTURK, N (reprint author), UNIV TOLEDO,DEPT PHYS & ASTRON,TOLEDO,OH 43606, USA. NR 9 TC 5 Z9 5 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 11 EP 14 PG 4 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500003 ER PT J AU DATSKOS, PG CARTER, JG CHRISTOPHOROU, LG AF DATSKOS, PG CARTER, JG CHRISTOPHOROU, LG TI IONIZATION COEFFICIENTS IN SELECTED GAS-MIXTURES OF INTEREST TO PARTICLE DETECTORS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRON SWARM PARAMETERS; ATTACHMENT AB We have measured and report the total gas-number-density normalized effective ionization coefficient, alphaBAR/N, as a function of the density-reduced electric field, E/N for Ar, CO2, CF4, the binary gas mixtures CF4:Ar (20:80), CO2:Ar(20:80), CO2:CH4(20:80) and for the ternary gas mixtures CO2:CF4:Ar (10:10:80) and H2O:CF4:Ar(2:18:80). We also report the limiting value, (E/N)lim of the above gaseous systems. A comparison of our results on the unitary gases shows good agreement with previous measurements. The results on the ternary mixtures show that the addition of CO2 or H2O to the binary gas mixture CF4:Ar lowers the electron energies and increases alphaBAR/N(E/N). C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. RP DATSKOS, PG (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,ATOM MOLEC & HIGH VOLTAGE PHYS GRP,OAK RIDGE,TN 37830, USA. NR 19 TC 12 Z9 12 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 15 EP 21 DI 10.1063/1.350730 PG 7 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500004 ER PT J AU WONG, JYC ZHANG, L KAKARANTZAS, G TOWNSEND, PD CHANDLER, PJ BOATNER, LA AF WONG, JYC ZHANG, L KAKARANTZAS, G TOWNSEND, PD CHANDLER, PJ BOATNER, LA TI ION-IMPLANTED OPTICAL WAVE-GUIDES IN KTAO3 SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID WAVE-GUIDE PROFILES AB Optical waveguides have been formed by helium-ion implantation in KTaO3. The implantation forms a confinement barrier near the projected range of the ion by decreasing the refractive index as much as 16% for ion doses of 4 x 10(16) ions/cm2. This is the highest refractive-index change yet reported for ion-implanted crystalline planar waveguides. Guiding modes (with moderately low loss) are produced without the need for annealing out of color centers. During annealing studies, the index change reduces during an anneal stage near 400-degrees-C, but waveguiding is maintained even after anneals to 900-degrees-C. Loss measurements indicate a planar-waveguide loss of < 1 dB/cm after a 400-degrees-C anneal. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP WONG, JYC (reprint author), UNIV SUSSEX,SCH MATH & PHYS SCI,BRIGHTON BN1 9QH,E SUSSEX,ENGLAND. RI Kakarantzas, George/F-7573-2011; Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 18 TC 19 Z9 19 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 49 EP 52 DI 10.1063/1.350684 PG 4 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500009 ER PT J AU SHANNON, MA ROSTAMI, AA RUSSO, RE AF SHANNON, MA ROSTAMI, AA RUSSO, RE TI PHOTOTHERMAL DEFLECTION MEASUREMENTS FOR MONITORING HEAT-TRANSFER DURING MODULATED LASER-HEATING OF SOLIDS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID BEAM-DEFLECTION; SPECTROSCOPY; ABLATION; ABSORPTION; PLASMA; PROBE AB Photothermal deflection (PTD) techniques have been used to monitor various laser-heating processes, including melt, vaporization, and ablation of solids. To interpret the complex signal response resulting from transient phase changes at a surface, the temporal profile of the PTD signal response must be considered. In doing so, the case of the linear heating of a target without phase change is first studied here. Numerical and experimental work is presented to show the effect on the shape, magnitude, and phase of a PTD signal due to changes in (1) the thermophysical properties of the target material and deflecting medium, (2) the dimensions and boundary conditions of the target, (3) the distance of the probe beam from the surface of the target, and (4) the modulation frequency of the heating source. Copper and lead target materials heated in air are used in the experimental work. The PTD signals show qualitative agreement with the temperature gradient normal to the surface calculated using a numerical finite-difference two-dimensional thermal-diffusion model. The results also show that an unusual phenomenon occurs when heating with a laser or other finite-sized heating source. When the thermal diffusivity of the target and deflecting medium are different and the probe beam is close to the surface, a local maximum is observed in the time-response profile of the PTD signal during the heating cycle. The maximum occurs as a result of asymmetric changes in the temperature field over time. The shape of the PTD signal, therefore, can provide information about the laser-heating process at a surface in real time. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV APPL SCI,BERKELEY,CA 94720. RP SHANNON, MA (reprint author), UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720, USA. NR 25 TC 16 Z9 16 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 53 EP 63 DI 10.1063/1.350645 PG 11 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500010 ER PT J AU RAO, MV NADELLA, RK HOLLAND, OW AF RAO, MV NADELLA, RK HOLLAND, OW TI ELEVATED-TEMPERATURE 3-MEV SI AND 150-KEV GE IMPLANTS IN INP-FE SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID INDIUM-PHOSPHIDE; ELECTRICAL CHARACTERISTICS; LAYERS AB Variable-fluence 3-MeV Si+ and 150-keV Ge+ implants were performed into InP:Fe at 200-degrees-C. Lattice damage in the material is greatly reduced over comparable room-temperature (RT) implantations and is rather insensitive to fluence for Si+ implantation in the range of 8 x 10(14)-5 x 10(15) cm-2, and no amorphization occurs. For 8 x 10(14)-cm-2 Si+ implantation at 200-degrees-C, the dopant activation is 82% and carrier mobility is 1200 cm2/V s after 875-degrees-C/10-s annealing, whereas for the RT implantation the corresponding values are 48% and 765 cm2/V s, respectively. The reasons for the improved mobility in the elevated-temperature implants were investigated using Rutherford-backscattering spectrometry. At a dose of 8 x 10(14) cm-2, the aligned yield after annealing is close to that of a virgin sample, indicating a low concentration of residual damage in the 200-degrees-C implant, whereas the lattice remained highly defective in the RT implanted sample. Elevated-temperature implantation of Si+ and Pi+ ions was also investigated. Coimplantation did yield an improvement in activation for an implanted fluence of 2 x 10(15) cm-2 Si+, but resulted in an inferior lattice quality which degraded the carrier mobility compared to a Si+ (only) implant. For a 1 x 10(14)-cm-2 Ge+ implant, the maximum dopant activation is 50% (donor) and the material did not turn p type even after 925-degrees-C annealing. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP RAO, MV (reprint author), GEORGE MASON UNIV,DEPT ELECT & COMP ENGN,FAIRFAX,VA 22030, USA. NR 23 TC 14 Z9 14 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 126 EP 132 DI 10.1063/1.350742 PG 7 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500021 ER PT J AU WONG, J NIXON, WE MITCHELL, JW LADERMAN, SS AF WONG, J NIXON, WE MITCHELL, JW LADERMAN, SS TI SOLUTE PAIRING IN SOLUTION-HARDENED CU-NI, CU-PD BINARY, AND CU-NI-PD TERNARY FCC ALLOYS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ABSORPTION FINE-STRUCTURE AB The pairing of solute atoms in solution-hardened binary and ternary face-centered cubic (fcc) binary and ternary Cu alloys has been investigated with the EXAFS (extended x-ray-absorption fine structure) technique using synchrotron radiation. Two binary Cu alloys, one containing 6 at. % Ni and the other 6 at. % Pd and a ternary Cu alloy containing 3 at. % Ni and 3 at. % Pd alloy were studied. The solute concentration in each system was chosen below that (8.33 at. %) required for finding one solute-solute pair in the first coordination sphere in the fcc structure. Detailed simulations of the experimental EXAFS signal arising from the first coordination shell of the Ni and Pd solute atoms in these alloys give the following results: (i) In both binary and ternary alloys, Ni is coordinated by 12 Cu host atoms at a distance equal to sum of the Goldschmidt radii. There is little evidence for Ni-Ni pairing. (ii) On the other hand, Pd-Pd pairing is found in both the binary and ternary systems. In addition, chemical interaction with the Cu matrix is evident from the Pd-Cu separation of 2.60 angstrom which is approximately 0.05 angstrom shorter than the sum of their Goldschmidt radii. (iii) Finally, there is no pairing of Ni-Pd solute atoms in the ternary alloy. C1 UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901. HEWLETT PACKARD CO,MAT RES LAB,PALO ALTO,CA 94304. RP WONG, J (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 24 TC 4 Z9 4 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 150 EP 157 DI 10.1063/1.350728 PG 8 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500025 ER PT J AU STEARNS, MB CHANG, CH STEARNS, DG AF STEARNS, MB CHANG, CH STEARNS, DG TI OPTIMIZATION OF GROWTH-CONDITIONS OF VAPOR-DEPOSITED MO/SI MULTILAYERS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID STRUCTURAL RELAXATION; ELECTRON-MICROSCOPY; FILMS AB The dependence of the layer structure and interfaces of e-beam deposited Mo/Si multilayers (ML) on growth conditions has been studied. The substrate temperature was varied over a range of 300-600 K at deposition rates of 1 and 3 angstrom/s. The structure of the ML was determined using small-angle x-ray scattering, large-angle x-ray scattering, and cross-sectional high-resolution electron microscopy. The variation of the normal incidence reflectivity was measured as a function of soft x-ray wavelength using synchrotron radiation. We found that the lateral extent of the Mo crystallites and the thickness and roughness of interlayers are a sensitive function of the substrate temperature. The morphology shows a lesser dependence on the deposition rate. The formation of the Mo-on-Si interlayer is partially thermally activated with an activation energy of approximately 0.2 eV. We propose that the rate limiting mechanism is surface diffusion during growth. At the optimal deposition conditions, of a substrate temperature of approximately 525 K and a deposition rate of 1 angstrom/s, the ML structure was found to have a smoothness and maximum normal incidence reflectivity comparable to the best sputtered Mo/Si films. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP STEARNS, MB (reprint author), ARIZONA STATE UNIV,DEPT PHYS,TEMPE,AZ 85287, USA. NR 28 TC 72 Z9 74 U1 2 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 187 EP 195 DI 10.1063/1.350735 PG 9 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500031 ER PT J AU SANFORD, TWL POUKEY, JW MOCK, RC WELCH, DR AF SANFORD, TWL POUKEY, JW MOCK, RC WELCH, DR TI DYNAMICS OF A 700-KA 19-MEV ELECTRON-BEAM IN A SHORT GAS CELL SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PLANAR-ANODE DIODE; FLOW AB The transport of the Hermes III annular, 19-MeV, 700-kA, 25-ns, electron beam of radius less-than-or-similar-to 26 cm and current density greater-than-or-similar-to 0.4 kA/cm2, through short gas cells filled with N2, is characterized as a function of injection parameters, cell length, and gas pressure. These measurements are compared with predictions of numerical and analytical models. The comparisons confirm the main features of the models and show that the early-time behavior of the beam and gas ionization determines the net current and associated magnetic fields for the entire pulse, particularly at low pressure. The net current is minimized for pressures near 3 Torr and is 4%-7% of the injected current at peak power. Owing to the radial distribution of the net current density, the mean beam trajectory is effectively ballistic at this pressure. C1 MISSION RES CORP,ALBUQUERQUE,NM 87106. RP SANFORD, TWL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 19 TC 14 Z9 14 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 472 EP 482 DI 10.1063/1.350680 PG 11 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500077 ER PT J AU LEUNG, TC WEINBERG, ZA ASOKAKUMAR, P NIELSEN, B RUBLOFF, GW LYNN, KG AF LEUNG, TC WEINBERG, ZA ASOKAKUMAR, P NIELSEN, B RUBLOFF, GW LYNN, KG TI POSITRON-ANNIHILATION AT THE SI/SIO2 INTERFACE SO JOURNAL OF APPLIED PHYSICS LA English DT Note AB Variable-energy positron annihilation depth-profiling has been applied to the study of the Si/SiO2 interface in Al-gate metal-oxide-semiconductor (MOS) structures. For both n- and p-type silicon under conditions of negative gate bias, the positron annihilation S-factor characteristic of the interface (S(int)) is substantially modified. Temperature and annealing behavior, combined with known MOS physics, suggest strongly that S(int) depends directly on holes at interface states or traps at the Si/SiO2 interface. C1 IBM CORP,DIV RES,TJ WATSON RES CTR,YORKTOWN HTS,NY 10598. RP LEUNG, TC (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Nielsen, Bent/B-7353-2009; Rubloff, Gary/D-4142-2009 OI Nielsen, Bent/0000-0001-7016-0040; Rubloff, Gary/0000-0002-1901-3982 NR 6 TC 12 Z9 12 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 530 EP 532 DI 10.1063/1.350694 PG 3 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500091 ER PT J AU HUGHES, RC SCHUBERT, WK AF HUGHES, RC SCHUBERT, WK TI THIN-FILMS OF PD/NI ALLOYS FOR DETECTION OF HIGH HYDROGEN CONCENTRATIONS SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID SENSITIVE MOS-STRUCTURES; SILVER-ALLOYS; ABSORPTION; PALLADIUM; KINETICS; SENSORS; DIODE AB Thin alloy films of Pd and Ni (8% < Ni < 20% in at. %) formed by dual-electron-beam evaporation techniques have been found to give durable and quickly reversible detectors of high H-2 concentrations (pH2 0.1%-100%, 0.7-700 Torr) near 1 atm and 300 K, including accurate determinations of pH2 around the lower explosive limit of 4% in air. The addition of Ni suppresses the alpha to beta-phase transition found in pure Pd under these conditions. The measurement of resistivity changes in the thin films along with flatband shifts of metal-oxide-semiconductor capacitors on the same Si wafer gives accurate values of pH-2 over more than six decades. RP HUGHES, RC (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 12 TC 135 Z9 140 U1 4 U2 29 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 1 PY 1992 VL 71 IS 1 BP 542 EP 544 DI 10.1063/1.350646 PG 3 WC Physics, Applied SC Physics GA GX655 UT WOS:A1992GX65500095 ER PT J AU LOGAN, AD PAFFETT, MT AF LOGAN, AD PAFFETT, MT TI STEADY-STATE CO OXIDATION-KINETICS OVER THE PD(100) SINGLE-CRYSTAL SURFACE AND THE C(2 X 2)-SN/PD(100) BIMETALLIC SURFACE ALLOY SO JOURNAL OF CATALYSIS LA English DT Article ID CARBON-MONOXIDE; CATALYTIC-OXIDATION; NOBLE-METALS; PALLADIUM; PD; ADSORPTION; PLATINUM; OXIDE C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV CHEM & LASER SCI,LOS ALAMOS,NM 87545. NR 40 TC 48 Z9 48 U1 0 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9517 J9 J CATAL JI J. Catal. PD JAN PY 1992 VL 133 IS 1 BP 179 EP 190 PG 12 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA GW167 UT WOS:A1992GW16700015 ER PT J AU KENNEL, SJ GODFREY, V CHANG, LY LANKFORD, TK FOOTE, LJ MAKKINJE, A AF KENNEL, SJ GODFREY, V CHANG, LY LANKFORD, TK FOOTE, LJ MAKKINJE, A TI THE BETA-4-SUBUNIT OF THE INTEGRIN FAMILY IS DISPLAYED ON A RESTRICTED SUBSET OF ENDOTHELIUM IN MICE SO JOURNAL OF CELL SCIENCE LA English DT Article DE INTEGRIN; BETA-4-SUBUNIT; ENDOTHELIUM; MAB MICRODISTRIBUTION ID MONOCLONAL-ANTIBODIES; EPITHELIAL-CELLS; ALPHA-6-BETA-4; RECEPTORS; LAMININ; RNA; SUBUNIT; BETA-4; CARCINOMA; SEQUENCE AB More than 15 subunits of the integrin family of cell surface adhesion molecules have been identified. The alpha(6)beta(4) integrin has recently been identified as a component of hemidesmosomes of stratified squamous epithelium. The monoclonal antibody (mAb) 346-11A binds to the beta(4) subunit in mice. Sequence analysis of a cDNA clone coding for this epitope localizes reaction of the mAb to a portion about half way through the extracellular domain at the beginning of the cysteine-rich region. Sites of beta(4) expression in mice were detected by autoradiographic analysis of tissues collected from mice 24 or 48 h after intravenous injection of I-125-labeled mAb 346-11A. This non-quantitative technique emphasizes detection of antigen exposed in the vascular space. These data show that in addition to the epithelia of several organs, the endothelia of intermediate vessels throughout the body are sites of beta(4) expression. In particular, endothelium of larger vessels but not capilaries in lung, vessels in thymus, spleen and Peyer's patches, and portal vessels but not the central veins of the liver, are positive. The expression of the beta(4) integrin in blood vessels may indicate a specialized function for beta(4) at these sites that is distinct from its role in hemidesmosome-mediated attachment. RP KENNEL, SJ (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. NR 34 TC 74 Z9 74 U1 0 U2 0 PU COMPANY OF BIOLOGISTS LTD PI CAMBRIDGE PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE, CAMBS, ENGLAND CB4 4DL SN 0021-9533 J9 J CELL SCI JI J. Cell Sci. PD JAN PY 1992 VL 101 BP 145 EP 150 PN 1 PG 6 WC Cell Biology SC Cell Biology GA HE094 UT WOS:A1992HE09400015 PM 1569120 ER PT J AU PARRY, G LI, J STUBBS, J BISSELL, MJ SCHMIDHAUSER, C SPICER, AP GENDLER, SJ AF PARRY, G LI, J STUBBS, J BISSELL, MJ SCHMIDHAUSER, C SPICER, AP GENDLER, SJ TI STUDIES OF MUC-1 MUCIN EXPRESSION AND POLARITY IN THE MOUSE MAMMARY-GLAND DEMONSTRATE DEVELOPMENTAL REGULATION OF MUC-1 GLYCOSYLATION AND ESTABLISH THE HORMONAL BASIS FOR MESSENGER-RNA EXPRESSION SO JOURNAL OF CELL SCIENCE LA English DT Article DE MUC-1; MAMMARY GLAND; MUCIN ID POLYMORPHIC EPITHELIAL MUCIN; RECONSTITUTED BASEMENT-MEMBRANE; FUNCTIONAL-DIFFERENTIATION; CORE PROTEIN; BREAST; CELLS; MORPHOGENESIS; CARCINOMAS; SECRETION; CULTURES AB Muc-1 is a major mucin glycoprotein expressed on the surface of mammary epithelial cells. It has attracted considerable attention as it is expressed in an aberrant form on many breast tumor cells. Here we describe studies using a recently obtained cDNA probe of Muc-1 expression during lactogenic development in the mouse. Northern blot analysis demonstrated that Muc-1 is expressed at all stages of lactogenic development but its levels are increased very significantly during mid-pregnancy and into lactation. The basis of this was examined using CID-9 mammary epithelial cell cultures. It was found that in the presence of insulin Muc-1 mRNA levels were increased by both hydrocortisone and prolactin, with the combination of the three hormones supporting maximum expression. Muc-1 mRNA levels were also modulated by culturing cells on a basement-membrane-like extracellular matrix that promoted mRNA levels 5- to 10-fold above levels in cells cultured on plastic tissue culture dishes. Immunocytochemical studies using monoclonal antibodies to carbohydrate epitopes on Muc-1 demonstrated that while Muc-1 was found at all developmental stages, it became increasingly sialylated during the course of pregnancy and into lactation. Additionally, we found that while Muc-1 is tightly polarized to the apical surface of the epithelium of lactating and pregnant mice it exhibited a less-polarized distribution on a small proportion of ductal cells in virgin mice. We conclude that the expression of Muc-1 is regulated at several different levels and by a number of different factors. We speculate that this may reflect different functional roles for Muc-1 at different stages of mammary development. C1 IMPERIAL CANC RES FUND,MOLEC EPITHELIAL CELL BIOL LAB,LONDON WC2A 3PX,ENGLAND. RP PARRY, G (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720, USA. NR 24 TC 47 Z9 49 U1 0 U2 1 PU COMPANY OF BIOLOGISTS LTD PI CAMBRIDGE PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE, CAMBS, ENGLAND CB4 4DL SN 0021-9533 J9 J CELL SCI JI J. Cell Sci. PD JAN PY 1992 VL 101 BP 191 EP 199 PN 1 PG 9 WC Cell Biology SC Cell Biology GA HE094 UT WOS:A1992HE09400020 PM 1569123 ER PT J AU ZALTASH, A ALLY, MR AF ZALTASH, A ALLY, MR TI REFRACTIVE-INDEXES OF AQUEOUS LIBR SOLUTIONS SO JOURNAL OF CHEMICAL AND ENGINEERING DATA LA English DT Article ID SYSTEM AB The refractive indexes of water-lithium bromide solutions were measured in the temperature range from 5.0 to 80.0-degrees-C and in the range of salt concentrations from 0.00 (deionized water) to 58.90 mass %. An electrolyte solution of LiBr in water was chosen for study because of its wide use as an absorption chiller fluid. The concentration of LiBr aqueous solution was determined by argentimetric titration using tetrabromofluorescein (Eosin) as an adsorption indicator and was checked at a few discrete concentrations (10.06, 20.30, and 58.90 mass % LiBr) against the values obtained by gravimetric analysis. The deviation between values obtained using these two techniques was found to be less than 0.27 mass %. The refractive indexes are shown to represent a reliable and convenient way of measuring the concentration of salt (or water) in LiBr solutions with accuracies of +/- 0.3 mass % salt. C1 OAK RIDGE NATL LAB,DIV ENERGY,POB 2008,BLDG 3147,MS 6070,OAK RIDGE,TN 37831. NR 9 TC 9 Z9 9 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0021-9568 J9 J CHEM ENG DATA JI J. Chem. Eng. Data PD JAN PY 1992 VL 37 IS 1 BP 110 EP 113 DI 10.1021/je00005a029 PG 4 WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA HB395 UT WOS:A1992HB39500029 ER PT J AU EDELSTEIN, N KOT, WK KRUPA, JC AF EDELSTEIN, N KOT, WK KRUPA, JC TI THE 5F-]6D ABSORPTION-SPECTRUM OF PA4+/CS2ZRCL6 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article AB The 5f1 --> 6d1 absorption spectrum of Pa-231(4+) diluted in a single crystal of Cs2ZrCl6 has been measured at 4.2 K. Three bands corresponding to the 6d(GAMMA-8g, GAMMA-7g, and GAMMA-8g') levels are assigned. Extensive vibronic structure has been observed for the lowest 5f --> 6d transition and this structure is compared to that recently reported for the 6d1 --> 5f1 emission spectra in the same system. C1 UNIV PARIS 11,INST PHYS NUCL,RADIOCHIM LAB,F-91406 ORSAY,FRANCE. RP EDELSTEIN, N (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. NR 6 TC 19 Z9 19 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 1 PY 1992 VL 96 IS 1 BP 1 EP 4 DI 10.1063/1.462506 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GY249 UT WOS:A1992GY24900001 ER PT J AU POLLOCK, EL RUNGE, KJ AF POLLOCK, EL RUNGE, KJ TI PATH-INTEGRAL STUDY OF MAGNETIC RESPONSE - EXCITONIC AND BIEXCITONIC DIAMAGNETISM IN SEMICONDUCTOR QUANTUM DOTS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article AB In the path-integral formulation of quantum mechanics, the response of a system of charges to a static magnetic field is determined by the flux enclosed by the particle paths. In particular, the diamagnetic susceptibility is proportional to the mean-squared path area normal to the field. This relation is derived, discussed, and illustrated by computing the diamagnetic susceptibility for excitons and biexcitons in a spherical sample of semiconductor material (quantum dot model). RP POLLOCK, EL (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94550, USA. NR 9 TC 11 Z9 12 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 1 PY 1992 VL 96 IS 1 BP 674 EP 680 DI 10.1063/1.462451 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA GY249 UT WOS:A1992GY24900072 ER PT J AU RARD, JA AF RARD, JA TI ISOPIESTIC DETERMINATION OF THE OSMOTIC AND ACTIVITY-COEFFICIENTS OF ((1-Y)H2SO4+YNA2SO4)(AQ) AT THE TEMPERATURE 298.15-K .2. RESULTS FOR Y = (0.12471, 0.24962, AND 0.37439) SO JOURNAL OF CHEMICAL THERMODYNAMICS LA English DT Article ID ACID SULFATE SYSTEMS; SULFURIC-ACID; SOLUTE ACTIVITIES; AQUEOUS H2SO4; 25-DEGREES-C; WATER; MIXTURES; THERMODYNAMICS; 25DEGREESC; CHLORIDE RP RARD, JA (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT EARTH SCI,LIVERMORE,CA 94550, USA. NR 40 TC 16 Z9 16 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0021-9614 J9 J CHEM THERMODYN JI J. Chem. Thermodyn. PD JAN PY 1992 VL 24 IS 1 BP 45 EP 66 DI 10.1016/S0021-9614(05)80255-1 PG 22 WC Thermodynamics; Chemistry, Physical SC Thermodynamics; Chemistry GA HA955 UT WOS:A1992HA95500007 ER PT J AU WONG, H MORRIS, S RADKE, CJ AF WONG, H MORRIS, S RADKE, CJ TI 2-DIMENSIONAL MENISCI IN NONAXISYMMETRIC CAPILLARIES SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Note C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT MECH ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. RI Wong, Harris/F-6097-2013 OI Wong, Harris/0000-0001-9402-6778 NR 6 TC 21 Z9 21 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD JAN PY 1992 VL 148 IS 1 BP 284 EP 287 DI 10.1016/0021-9797(92)90138-C PG 4 WC Chemistry, Physical SC Chemistry GA GW063 UT WOS:A1992GW06300032 ER PT J AU FENDORF, SE SPARKS, DL FENDORF, M GRONSKY, R AF FENDORF, SE SPARKS, DL FENDORF, M GRONSKY, R TI SURFACE PRECIPITATION REACTIONS ON OXIDE SURFACES SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Letter ID HYDROLYZABLE METAL-IONS; ELECTRICAL DOUBLE-LAYER; WATER INTERFACE; MANGANESE-DIOXIDE; MODEL; ADSORPTION; OXIDATION; CO(II) C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP FENDORF, SE (reprint author), UNIV DELAWARE,DEPT PLANT & SOIL SCI,NEWARK,DE 19717, USA. NR 18 TC 31 Z9 31 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD JAN PY 1992 VL 148 IS 1 BP 295 EP 298 DI 10.1016/0021-9797(92)90141-8 PG 4 WC Chemistry, Physical SC Chemistry GA GW063 UT WOS:A1992GW06300035 ER PT J AU GROVES, S SANCHEZ, R LYON, R MAGNESS, F AF GROVES, S SANCHEZ, R LYON, R MAGNESS, F TI EVALUATION OF CYLINDRICAL SHEAR JOINTS FOR COMPOSITE-MATERIALS SO JOURNAL OF COMPOSITE MATERIALS LA English DT Article AB The objective of this work was to evaluate the strength of four candidate cylindrical shear joints for composite tubes. The basic design for the joint entails an axial length of one inch with an external 15-degrees tapered cone. The purpose of the joint is to transfer axial load from a cylinder through a steel shear attachment with a matching internal conical seat. The design candidates consisted of a bonded wedge cone, pinned wedge cone, and a bonded and pinned wedge cone attached to a two-inch diameter composite tube and a wedge cone integrally wound into the tube. The actual joint strengths achieved were higher than expected for some designs and were found to be dependent on the amount of hydrostatic or radial compression applied to the joint. The bonded wedge ring and the integral wedge ring both achieved over 96 MPa (14 ksi) of shear strength without failure. Due to the unexpectedly high shear strengths of the joints most of the failures were located in other parts of the test specimen. The bonded wedge cone was probably close to its maximum load carrying capacity while the integral wedge design showed potential for even higher shear strengths. The bonded and pinned joint reached a peak shear strength of 78.9 MPa (11.5 ksi) and the pinned only configuration achieved 70.6 MPa (10.3 ksi). When loaded without any hydrostatic compression the joint strengths were less than 34.3 MPa (5 ksi); however, the failure mode was hoop compression buckling of the tube itself as opposed to a joint shear failure. RP GROVES, S (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV ENGN SCI,MAT TEST & EVALUAT SECT,LIVERMORE,CA 94550, USA. NR 6 TC 8 Z9 8 U1 0 U2 0 PU TECHNOMIC PUBL CO INC PI LANCASTER PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 SN 0021-9983 J9 J COMPOS MATER JI J. Compos Mater. PY 1992 VL 26 IS 8 BP 1134 EP 1150 DI 10.1177/002199839202600803 PG 17 WC Materials Science, Composites SC Materials Science GA HZ256 UT WOS:A1992HZ25600003 ER PT J AU MCBRIDE, JF BROCKMAN, FJ SZECSODY, JE STREILE, GP AF MCBRIDE, JF BROCKMAN, FJ SZECSODY, JE STREILE, GP TI KINETICS OF QUINOLINE BIODEGRADATION, SORPTION AND DESORPTION IN A CLAY-COATED MODEL SOIL CONTAINING A QUINOLINE-DEGRADING BACTERIUM SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article; Proceedings Paper CT SYMP AT THE PACIFIC BASIN CHEMICAL SOCIETIES MEETING : CHEMICAL MEDIATION OF POLLUTANT TRANSPORT IN AQUEOUS SYSTEMS ( PACIFICHEM 89 ) CY DEC 17-22, 1989 CL HONOLULU, HI SP CANADIAN SOC CHEM, CHEM SOC JAPAN, AMER CHEM SOC ID POROUS-MEDIA; TRANSPORT; ADSORPTION; SOLUTES; GROWTH AB Kinetics of quinoline biodegradation, sorption and desorption in a clay-coated model soil containing a quinoline-degrading bacterium. Studies were initiated to compare the kinetics of quinoline sorption/desorption and biodegradation in order to predict the relative importance of abiotic and biotic processes in the transport of quinoline in columns containing a model soil. Initial biodegradation studies were conducted in a 1-cm-long column containing a quinoline-degrading bacterium (10(9) colony-forming units g-1 porous medium) attached to 100- to 150-mu-m-diameter glass beads that did not sorb quinoline. At a 155-nmol mL-1 quinoline influent concentration, the maximum consumption rate was 104.7 nmol quinoline min-1 cm-3 pore volume. In contrast, the maximum consumption rate of the first metabolite (2-hydroxyquinoline) was 24.8 nmol mL-1 cm-3 pore volume. In a second experiment, bacteria were mixed with a model soil, consisting of montmorillonite bound to alumina particles (75- to 180-mu-m diameter). In a 1-cm-long column of the model soil, the quinoline consumption rate at a 155-nmol mL-1 quinoline influent concentration was similar to that obtained in the glass-bead column, showing that the clay does not substantially affect quinoline biodegradation at equilibrium conditions. In a third series of experiments, sorption to the model soil was examined in the absence of microorganisms. The observed desorption rate coefficient for quinoline averaged 1.1 . 10(-3) s-1, which was one to three orders of magnitude smaller than was observed for Ca-45. The slow ion exchange of quinoline on the clay surface is controlled by a site-specific quinoline/montmorillonite interaction and not a larger-scale physical step (i.e. interparticle diffusion). Equilibrium first-order forward (sorption) and reverse (desorption) mass fluxes were 1160 nmol cm-1 cm-3 pore volume with a 155-nmol mL-1 quinoline influent concentration. The initial quinoline mass flux to the clay was estimated as 31,800 nmol cm-1 cm-3 pore volume. Thus, under the experimental conditions, the net rate of decrease of solution-phase quinoline is greater through abiotic processes than through biodegradation. Coefficients obtained from the individual sorption and biodegradation experiments were used in a sorption/biodegradation transport model to quantify any sorption/biodegradation interactions. Breakthrough of quinoline occurred more rapidly in the sorption/biodegradation experiments. indicating substantially less sorption compared to sorption experiments, Quinoline sorption was reduced a small amount due to competitive sorption between quinoline and 2-hydroxyquinoline (biodegradation intermediate), but this effect was too small to account for the substantial decrease in quinoline sorption. Experimental and calculated estimates of biomass coverage on the particles also accounted for some decrease in quinoline sorption, but not the large decrease observed. Therefore other, undefined, processes may contribute to the observed sorption/biodegradation interaction. RP MCBRIDE, JF (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 36 TC 17 Z9 19 U1 2 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD JAN PY 1992 VL 9 IS 1-2 BP 133 EP 154 DI 10.1016/0169-7722(92)90055-J PG 22 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA HP813 UT WOS:A1992HP81300010 ER PT J AU WALKER, FJ MCKEE, RA AF WALKER, FJ MCKEE, RA TI HIGH-TEMPERATURE STABILITY OF MOLECULAR-BEAM EPITAXY-GROWN MULTILAYER CERAMIC COMPOSITES - TIO/TI2O3 SO JOURNAL OF CRYSTAL GROWTH LA English DT Article AB The premise that conventional composite microstructures are inherently unstable at high temperatures is reviewed in the context of thermodynamic equilibrium at the atomic scale in ceramic materials. We have found that a multilayer, two component microstructure can be synthesized in which interfacial stability can be maintained to temperatures approaching the melting point of its constituents. Coarsening of the layers is avoided by the presence of flat, commensurate interfaces between components that are in thermodynamic equilibrium. As an example, we examine the high-temperature stability of a strained layer superlattice (SLS) having a nanometer wavelength (5.6 nm) consisting of TiO and Ti2O3 layers. The intrinsic characteristics of the interface, such as lattice matching and structure, are fundamental in determining the stability against coarsening of a microstructure previously considered delicate. C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. RP WALKER, FJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. OI Walker, Frederick/0000-0002-8094-249X NR 11 TC 3 Z9 3 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JAN PY 1992 VL 116 IS 1-2 BP 235 EP 239 DI 10.1016/0022-0248(92)90133-4 PG 5 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA HC056 UT WOS:A1992HC05600027 ER PT J AU FRIBERG, SE CHIU, M ANGIE, JE SMITH, DH AF FRIBERG, SE CHIU, M ANGIE, JE SMITH, DH TI FOAMING OF SURFACTANT COMBINATIONS - SODIUM DODECYL-SULFATE AND IGEPAL CO-210 SO JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY LA English DT Article ID STABILITY AB The stability was investigated of foams formed from water plus combinations of a hydrophobic, nonionic surfactant and an ionic, water-soluble one. When the total concentration of the two surfactants was kept constant, the foam stability was strongly increased for a certain ratio of them. Phase equilibria revealed this enhanced stability to be due to the presence of a lamellar liquid crystalline phase. In the region of two liquid phases, (aqueous solution and solution rich in Igepal CO 210) the stability depended on the volume ratio between the two solutions in a more complex manner. C1 MORGANTOWN ENERGY TECHNOL CTR,DEPT ENERGY,MORGANTOWN,WV 26507. RP FRIBERG, SE (reprint author), CLARKSON UNIV,DEPT CHEM,POTSDAM,NY 13699, USA. NR 22 TC 0 Z9 0 U1 1 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0193-2691 J9 J DISPER SCI TECHNOL JI J. Dispersion Sci. Technol. PY 1992 VL 13 IS 3 BP 271 EP 291 DI 10.1080/01932699208943315 PG 21 WC Chemistry, Physical SC Chemistry GA HX626 UT WOS:A1992HX62600002 ER PT J AU GARNETTE, CP LENK, C AF GARNETTE, CP LENK, C TI EXAMINING THE ROLE OF DISTANCE LEARNING FOR STUDENTS OF DIVERSE POPULATIONS SO JOURNAL OF EDUCATIONAL COMPUTING RESEARCH LA English DT Note C1 MASSACHUSETTS CORP EDUC TELECOMMUN,CAMBRIDGE,MA 02139. RP GARNETTE, CP (reprint author), US DOE,OFF EDUC RES & IMPROVEMENT,555 NEW JERSEY AVE NW,WASHINGTON,DC 20208, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU BAYWOOD PUBL CO INC PI AMITYVILLE PA 26 AUSTIN AVE, AMITYVILLE, NY 11701 SN 0735-6331 J9 J EDUC COMPUT RES JI J. Educ. Comput. Res. PY 1992 VL 8 IS 2 BP 259 EP 263 PG 5 WC Education & Educational Research SC Education & Educational Research GA HX629 UT WOS:A1992HX62900007 ER PT J AU BARTH, MJ MCLEOD, RR ZIOLKOWSKI, RW AF BARTH, MJ MCLEOD, RR ZIOLKOWSKI, RW TI A NEAR AND FAR-FIELD PROJECTION ALGORITHM FOR FINITE-DIFFERENCE TIME-DOMAIN CODES SO JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS LA English DT Article AB The class of problems to which the Finite-Difference Time-Domain (FDTD) method can be applied is extended through the use of near and far-field projection techniques. These methods are developed by applying the equivalence principle to a surface within the FDTD problem space. Algorithms are found to project the equivalent electric and magnetic currents on this surface to any point in space either in the time or the frequency domains. A summary of extensive validation and error checking results is presented which shows the routines to be robust and accurate to within a few percent. As a result, the FDTD approach can be applied to a number of previously impractical problems. RP BARTH, MJ (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,7000 E AVE,POB 808,LIVERMORE,CA 94550, USA. NR 0 TC 26 Z9 28 U1 0 U2 0 PU VSP BV PI ZEIST PA PO BOX 346, 3700 AH ZEIST, NETHERLANDS SN 0920-5071 J9 J ELECTROMAGNET WAVE JI J. Electromagn. Waves Appl. PY 1992 VL 6 IS 1 BP 5 EP 18 PG 14 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HB751 UT WOS:A1992HB75100002 ER PT J AU CHEN, KC WARNE, LK WU, TT AF CHEN, KC WARNE, LK WU, TT TI ACCURATE FORMULAS AND ASYMPTOTIC EXPANSIONS OF TRANSIENT ANTENNA CURRENT SO JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS LA English DT Article AB Approximate formulas for transient antenna current on an infinite cylindrical antenna caused by a step voltage source, applied at the delta gap, are discussed. A new alternative formula is derived. An asymptotic expansion of the transient solution for late time is given. The Hallen filament approximation, a previous simple formula obtained by averaging, an alternative formula, and the asymptotic expansion are compared to the accurate numerical integration of the exact solution. RP CHEN, KC (reprint author), SANDIA NATL LABS,DIV 2753,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU VSP BV PI ZEIST PA PO BOX 346, 3700 AH ZEIST, NETHERLANDS SN 0920-5071 J9 J ELECTROMAGNET WAVE JI J. Electromagn. Waves Appl. PY 1992 VL 6 IS 3 BP 297 EP 308 PG 12 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA HJ180 UT WOS:A1992HJ18000003 ER PT J AU WARNE, LK CHEN, KC AF WARNE, LK CHEN, KC TI EFFECTIVE IMPEDANCE OF BOLT LOADS ON NARROW SLOT APERTURES HAVING DEPTH SO JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS LA English DT Article AB Unintentional slot apertures formed at the joints in the outer shell of a system are typically terminated by bolts or rivets. When the slot is narrow (length and wavelength much larger than the slot cross section) the question arises: How can these loads be incorporated into the antenna model for the slot? Impedance loads for the antenna model are derived by considering the difference between the Hallen filamentary feed representation and the true bolt geometry. Simple formulas are derived for the inductance of such loads. The leading order formulas are derived by means of conformal mapping considering only the interior of the slot. A correction resulting from the exterior of the slot is also given. These formulas show (in the case where the bolt or rivet makes contact with the conductors on each side of the width of the slot) that the bolt or rivet may be treated approximately as a short circuit. This follows because the condition that the slot be narrow, required to treat it by means of an antenna model, is also required for the bolt load to approach a short circuit. However, in the case where an annular gap exists around the bolt or rivet in the slot conducting wall, and the length of this annular region (typically the thickness of the metal wall) is much larger than the slot width, the resulting inductance can dominate the bolt load effect and in certain cases make the bolt or rivet act more as an open circuit; bolt or rivet contact impedance can lead to similar results. RP WARNE, LK (reprint author), SANDIA NATL LABS,DIV ELECTROMAGNET ANAL,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU VSP BV PI ZEIST PA PO BOX 346, 3700 AH ZEIST, NETHERLANDS SN 0920-5071 J9 J ELECTROMAGNET WAVE JI J. Electromagn. Waves Appl. PY 1992 VL 6 IS 7 BP 891 EP 910 PG 20 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA JC183 UT WOS:A1992JC18300006 ER PT J AU KRAZINSKI, JL VANKA, SP PEARCE, JA ROQUEMORE, WM AF KRAZINSKI, JL VANKA, SP PEARCE, JA ROQUEMORE, WM TI A COMPUTATIONAL FLUID-DYNAMICS AND CHEMISTRY MODEL FOR JET FUEL THERMAL-STABILITY SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT 35TH INTERNATIONAL GAS TURBINE AND AEROENGINE CONGRESS AND EXPOSITION CY JUN 11-14, 1990 CL BRUSSELS, BELGIUM ID DEPOSITION AB This paper describes the development of a model for predicting the thermal decomposition rates of aviation fuels. A thermal deposition model was incorporated into FLANELS-2D, an existing computational fluid dynamics (CFD) code that solves the Reynolds-averaged conservation equations of mass, momentum, and energy. The decomposition chemistry is modeled by three global Arrhenius expressions in which the fuel decomposition was assumed to be due to an autoxidation reaction with dissolved oxygen. The deposition process was modeled by assuming that all deposit-forming species transported to the wall adhered and formed a deposit. Calibration of the model required the determination of the following parameters for a given fuel: (1) the pre-exponential constant and activation energy for the wall reaction, (2) the pre-exponential constant and activation energy for the bulk autoxidation reaction, and (3) the pre-exponential constant and activation energy for the precursor decomposition reaction. Values for these parameters were estimated using experimental data from published heated-tube experiments. Results show that the FLANELS-2D code performed well in estimating the fuel temperatures and that the three-equation chemistry model performed reasonably well in accounting for both the rate of deposition and the amount of dissolved oxygen present in the fuel at the end of the heated tube. C1 UNIV ILLINOIS,URBANA,IL 61801. AERO PROP & POWER LAB,WRIGHT PATTERSON AFB,OH 45433. RP KRAZINSKI, JL (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 22 TC 12 Z9 13 U1 2 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4795 J9 J ENG GAS TURB POWER JI J. Eng. Gas. Turbines Power-Trans. ASME PD JAN PY 1992 VL 114 IS 1 BP 104 EP 110 DI 10.1115/1.2906291 PG 7 WC Engineering, Mechanical SC Engineering GA HP743 UT WOS:A1992HP74300015 ER PT J AU RICHARDS, GA LOGAN, RG MEYER, CT ANDERSON, RJ AF RICHARDS, GA LOGAN, RG MEYER, CT ANDERSON, RJ TI ASH DEPOSITION AT COAL-FIRED GAS-TURBINE CONDITIONS - SURFACE AND COMBUSTION TEMPERATURE EFFECTS SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME LA English DT Article AB A study of ash deposition from a cleaned bituminous and conventional bituminous coal is presented. An electrically heated drop tube furnace is used to burn the coal and provide deposition conditions representative of proposed coal-fired gas turbines. Variations in the combustion temperature and deposit surface temperature demonstrate that surface cooling may significantly reduce ash deposition, or may provide little benefit, depending on the combustion conditions. Lower temperture combustion produced larger ash particles, with a greater fraction of ash adhering to the deposition test surface. Although the sticking coefficient was higher at the lower combustion temperature, the deposits were readily removed. A modest numerical simulation suggests that the smallest ash particles can experience significant boundary layer cooling and may account for the reduction in sticking observed at some conditions. RP RICHARDS, GA (reprint author), US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26505, USA. NR 15 TC 19 Z9 20 U1 0 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4795 J9 J ENG GAS TURB POWER JI J. Eng. Gas. Turbines Power-Trans. ASME PD JAN PY 1992 VL 114 IS 1 BP 132 EP 138 DI 10.1115/1.2906295 PG 7 WC Engineering, Mechanical SC Engineering GA HP743 UT WOS:A1992HP74300019 ER PT J AU LEVY, AV WANG, BQ GENG, GQ AF LEVY, AV WANG, BQ GENG, GQ TI RELATIONSHIP BETWEEN FEEDSTOCK CHARACTERISTICS AND EROSIVITY OF FBC BED MATERIALS SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT 35TH INTERNATIONAL GAS TURBINE AND AEROENGINE CONGRESS AND EXPOSITION CY JUN 11-14, 1990 CL BRUSSELS, BELGIUM AB The erosion-corrosion (E-C) metal wastage mechanisms and rates that occur in 1018 plain carbon steel used in tubular heat exchangers of fluid bed combustors (FBC) are discussed. The characteristics of FBC bed material erodent particles such as composition, shape, size, and strength were found to have a major effect on the surface degradation mechanisms and rates that occurred. A total of 16 different bed material particles from ten different FBCs were tested. It was determined that when the particles were strong enough not to shatter when they impacted the steel's surface, their shape and composition were the most important factors in determining their erosivity. The relative amounts of SiO2, CaO, CaCO3, CaSO4, and alkali compounds in the bed materials were related to the metal wastage by using laboratory mixtures of the compounds as erodents. The ratio of SiO2 to CaO and CaCO3 was especially important in determining the erosivity of the bed materials. It was found that increasing this ratio increased the metal wastage. A sharp transition ratio occurred on either side of which the metal wastages were linear. The slope of the linear curve was low for the lower sand content mixtures and higher for higher sand content mixtures. The transition ratio required a higher CaO content for higher velocity particles. C1 XIAN INST HIGHWAYS,XIAN,PEOPLES R CHINA. RP LEVY, AV (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4795 J9 J ENG GAS TURB POWER JI J. Eng. Gas. Turbines Power-Trans. ASME PD JAN PY 1992 VL 114 IS 1 BP 145 EP 151 DI 10.1115/1.2906298 PG 7 WC Engineering, Mechanical SC Engineering GA HP743 UT WOS:A1992HP74300021 ER PT J AU WILLIAMSON, RL KNIBLOE, JR WRIGHT, RN AF WILLIAMSON, RL KNIBLOE, JR WRIGHT, RN TI PARTICLE-LEVEL INVESTIGATION OF DENSIFICATION DURING UNIAXIAL HOT-PRESSING - CONTINUUM MODELING AND EXPERIMENTS SO JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article ID HIP AB A combination of continuum models and experiments is used to investigate the deformation of individual particles during hot pressing. Results are described for both monosized and bimodal particle distributions, including a simple bimodal composite system. The effects of pressure and temperature on the densification rate, particle shape, and stress and strain fields are described. The detailed strain fields calculated by the model are useful for predicting microstructural development during the pressing process and thus can aid in the design of optimal pressing cycles. RP WILLIAMSON, RL (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. OI Williamson, Richard/0000-0001-7734-3632 NR 16 TC 5 Z9 5 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0094-4289 J9 J ENG MATER-T ASME JI J. Eng. Mater. Technol.-Trans. ASME PD JAN PY 1992 VL 114 IS 1 BP 105 EP 110 DI 10.1115/1.2904129 PG 6 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA HC693 UT WOS:A1992HC69300018 ER PT J AU RUBIN, ES SMALL, MJ BLOYD, CN HENRION, M AF RUBIN, ES SMALL, MJ BLOYD, CN HENRION, M TI INTEGRATED ASSESSMENT OF ACID-DEPOSITION EFFECTS ON LAKE ACIDIFICATION SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article ID EASTERN-UNITED-STATES; SURFACE WATERS; EPISODIC ACIDIFICATION; STREAMWATER CHEMISTRY; CONTROL STRATEGIES; MODEL; SULFATE; NORWAY; RAIN; FORMULATION AB An integrated assessment model is used to estimate SO2 emission effects on regional lake acidification and fish viability in two regions of North America (Adirondack Park, New York, and the Boundary Waters region of northern Minnesota). An uncertainty analysis is employed to estimate the likely range of possible impacts. Based on emission projections for the United States and Canada, lake acidification in these two regions appears likely to improve slowly over the next two decades. An acid-rain control program will accelerate the recovery of acidic lakes at Adirondack Park, with a projected decrease over the no-control case of approximately 2-11% in the number of lakes below pH 5.5 and a 0.4-6% increase in the number of lakes potentially able to support brook or lake trout by the year 2010. For Boundary Waters, the expected improvements are negligible since deposition levels are relatively low. Our-analysis does demonstrate a potential for larger or smaller improvements in these two regions, with lower probabilities of occurrence. Uncertainties in regional lake chemistry and aquatic biology dominate the overall uncertainty in acidification effects estimated for these two regions, within the limitations of the analysis. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. ROCKWELL SCI CTR,PALO ALTO,CA 94301. CARNEGIE MELLON UNIV,DEPT MECH ENGN,PITTSBURGH,PA 15213. CARNEGIE MELLON UNIV,DEPT CIVIL ENGN,PITTSBURGH,PA 15213. RP RUBIN, ES (reprint author), CARNEGIE MELLON UNIV,DEPT ENGN & PUBL POLICY,PITTSBURGH,PA 15213, USA. RI Rubin, Edward/D-7629-2013 NR 57 TC 14 Z9 14 U1 4 U2 9 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD JAN-FEB PY 1992 VL 118 IS 1 BP 120 EP 134 DI 10.1061/(ASCE)0733-9372(1992)118:1(120) PG 15 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HB544 UT WOS:A1992HB54400009 ER PT J AU JOSLIN, JD KELLY, JM VANMIEGROET, H AF JOSLIN, JD KELLY, JM VANMIEGROET, H TI SOIL CHEMISTRY AND NUTRITION OF NORTH-AMERICAN SPRUCE-FIR STANDS - EVIDENCE FOR RECENT CHANGE SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Review ID HIGH-ELEVATION FORESTS; NORTHEASTERN UNITED-STATES; RED SPRUCE; NEW-ENGLAND; FOLIAR CHEMISTRY; CHEMICAL CHARACTERISTICS; NITROGEN MINERALIZATION; SULFATE ADSORPTION; ACID PRECIPITATION; NUTRIENT STATUS AB One set of hypotheses offered to explain the decline of red spruce (Picea rubens Sarg.) in eastern North America focuses on the effect of acidic deposition on soil chemistry changes that may affect nutrient availability and root function. Long-term soils data suggest that soil acidification has occurred in some spruce stands over the past 50 yr, with plant uptake and cation leaching both contributing to the loss of cations. Studies of tree ring chemistry also have indicated changes in Ca/Al and Mg/Al ratios in red spruce wood, suggesting increases in the ionic strength of soil solution. Irrigation studies using strong acid inputs have demonstrated accelerated displacement of base cations from upper horizons. Spruce-fir (Abies spp.) nutrient budgets indicate that current net Ca and Mg leaching loss rates are of the same order of magnitude as losses to whole tree harvest removals, spread out over a 50-yr rotation. For most cations, red spruce foliar nutrient levels decline with elevation, but it is difficult to assess the contribution of the elevational gradient in atmospheric deposition to this pattern. Compared to northeastern sites, spruce-fir soil solutions in the southern Appalachians have higher nitrate levels and higher Al concentrations, which at times approach the Al toxicity threshold for red spruce seedlings and frequently are at levels known to interfere with cation uptake. There is little evidence that either nutrient deficiencies or Al toxicity are primary causes of red spruce decline in the Northeast, though both may play a role in the Southeast. Major factors that could affect soil chemistry in spruce-fir stands in the future are (i) changes in S and N deposition, (ii) climate changes affecting soil organic matter decomposition and nutrient uptake, and (iii) tree mortality and physical disturbances to soils resulting in soil nitrate release. RP JOSLIN, JD (reprint author), OAK RIDGE NATL LAB,COOPERAT FOREST STUDIES PROGRAM,BLDG 1506,POB 2008,OAK RIDGE,TN 37831, USA. RI Van Miegroet, Helga/A-1925-2012 NR 132 TC 68 Z9 69 U1 2 U2 8 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD JAN-MAR PY 1992 VL 21 IS 1 BP 12 EP 30 PG 19 WC Environmental Sciences SC Environmental Sciences & Ecology GA HD304 UT WOS:A1992HD30400002 ER PT J AU NOVAK, JM MILLS, GL BERTSCH, PM AF NOVAK, JM MILLS, GL BERTSCH, PM TI ESTIMATING THE PERCENT AROMATIC CARBON IN SOIL AND AQUATIC HUMIC SUBSTANCES USING ULTRAVIOLET ABSORBENCY SPECTROMETRY SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Note AB The aromatic C content of humic substances is an important chemical property that can be used to explain formation, source, and potential interactions of the humic substances with pesticides and other contaminant organics. The relationship between the UV absorptivity at 272, 254, and 205 nm of six aquatic fulvic acids, eight soil fulvic acids, and four water soluble organic C (WSOC) fractions, and their aromatic C content, as determined by C-13 cross-polarization magic angle spinning nuclear magnetic resonance (CPMAS NMR) spectroscopy was evaluated. The percent aromatic C (determined by NMR) for the pooled soil and aquatic fulvic acids and WSOC fractions data was poorly correlated (r < 0.7) with the UV absorptivity measurements at all three wavelengths. When the soil fulvic acid was considered individually, however, a relatively high correlation (r = 0.80 to 0.85, P < 0.05) resulted for the prediction of aromatic C content using UV absorptivity. Poor correlations were found for the other individual fractions. Our data suggest that the prediction of aromatic C content using UV absorptivity was applicable only for base-extracted soil fulvic acids and not for the aquatic fulvic acids and soil WSOC fractions used in this study. RP NOVAK, JM (reprint author), UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,DIV BIOGEOCHEM,AIKEN,SC 29802, USA. NR 12 TC 44 Z9 44 U1 2 U2 12 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD JAN-MAR PY 1992 VL 21 IS 1 BP 144 EP 147 PG 4 WC Environmental Sciences SC Environmental Sciences & Ecology GA HD304 UT WOS:A1992HD30400022 ER PT J AU ROBERTSON, DE PERKINS, RW LEPEL, EL THOMAS, CW AF ROBERTSON, DE PERKINS, RW LEPEL, EL THOMAS, CW TI RADIONUCLIDE CONCENTRATIONS IN ENVIRONMENTAL-SAMPLES COLLECTED AROUND CHERNOBYL DURING THE INTERNATIONAL-CHERNOBYL-PROJECT - ANALYSES CONDUCTED BY BATTELLE, PACIFIC-NORTHWEST-LABORATORY SO JOURNAL OF ENVIRONMENTAL RADIOACTIVITY LA English DT Article AB Long-lived radionuclides have been measured by Pacific Northwest Laboratory (PNL) in environmental samples collected in the vicinity of Chernobyl. The concentrations and distributions of radionuclides in the environs of Chernobyl measured in this study, were generally in the same range as reported earlier in the official Soviet data releases. The highest radionuclide concentrations observed during this study were in moss samples scraped from the surfaces of roofs, trees, and tombstones, and these moss species appear to be efficient collectors of the Chernobyl fallout in this region. Analyses of undisturbed soil cores indicated that the Chernobyl fallout was still concentrated in the upper several centimeters of soil as of August, 1990 Cesium-137 is the least mobile of all of the radionuclides measured Radionuclide concentrations in other environmental media are presented and evaluated. The first reported concentrations of I-129 in a soil core and moss samples from this region are presented. RP ROBERTSON, DE (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0265-931X J9 J ENVIRON RADIOACTIV JI J. Environ. Radioact. PY 1992 VL 17 IS 2-3 BP 159 EP 182 DI 10.1016/0265-931X(92)90024-N PG 24 WC Environmental Sciences SC Environmental Sciences & Ecology GA JX950 UT WOS:A1992JX95000007 ER PT J AU LUCAS, HF MARKUN, F AF LUCAS, HF MARKUN, F TI THE DETERMINATION OF RA-226 AND RA-228 IN WATER AND SOLIDS BY THE LEAST-SQUARES GAMMA SPECTROMETRIC METHOD SO JOURNAL OF ENVIRONMENTAL RADIOACTIVITY LA English DT Article AB An extremely simple, fast and accurate method for the simultaneous analysis of both Ra-226 and Ra-228 in water, sludge, sediments, soil and other types of samples has been developed. This method differs from the standard US Environmental Protection Agency methods for radium analysis in that it is used for all types of environmental materials. The radium from a 10- to 100-liter water sample is adsorbed on to a special high-radium-retaining resin, placed in a sealed container and counted on a sodium iodide detector system. The resultant gamma-ray spectrum is analyzed by a least squares method to determine the nuclides present. For a 20-liter water sample, the accuracy approaches +/- 4% at radium concentrations of 90 mBq2 liter-1 (2.5 pCi liter-1). For 20-liter water samples processed in the system at Argonne National Laboratory, the lower limit of detection (4.66-sigma background) for Ra-226 and Ra-228 are 130 mBq (6.5 mBq liter-1) and 240 mBq (12 mBq liter-1), respectively. However, systematic errors increase this limit to about 20 mBq liter-1 for both radionuclides. The lower limits of detection for natural uranium and thorium series nuclides in secular equilibrium in sludge, sediments and other types of solid samples are 240 mBq and 190 mBq, respectively. Thus, only 50- to 100-g quantities of sludge, sediments, soils and other types of solid samples are required and these samples are processed non-destructively. A single operator can process up to 20 water or solid samples per day. When these samples are counted on an analysis system with completely automatic sample changing, a single counting system can process up to 3500 samples per year. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 14 Z9 14 U1 0 U2 5 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0265-931X J9 J ENVIRON RADIOACTIV JI J. Environ. Radioact. PY 1992 VL 15 IS 1 BP 1 EP 18 DI 10.1016/0265-931X(92)90039-V PG 18 WC Environmental Sciences SC Environmental Sciences & Ecology GA GX022 UT WOS:A1992GX02200001 ER PT J AU HWANG, ST AF HWANG, ST TI DETERMINING TARGET CLEANUP LEVELS - A RISK ASSESSMENT-BASED DECISION-PROCESS FOR CONTAMINATED SITES SO JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-ENVIRONMENTAL SCIENCE AND ENGINEERING & TOXIC AND HAZARDOUS SUBSTANCE CONTROL LA English DT Article AB This paper presents methodologies for estimating target cleanup levels at Superfund sites. The methodologies follow those in the EPA Superfund risk assessment guideline but are performed in reverse order. This is done to determine cleanup levels that correspond to reference doses for noncarcinogens or to a reference risk level for carcinogens as recommended by the U.S. EPA. The target cleanup levels thus derived should be considered adequate to protect public health when multiple pathways of exposure to contaminants in air, soil, food, and water are possible. The transient nature of contaminant concentrations in soil, subject to change over time due to volatilization, leaching, and other phenomena, is also addressed. An example is given which indicates that when the exposure is attributable predominantly to a single pathway, the calculation needed for estimating the target cleanup levels can be considerably simplified. RP HWANG, ST (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 19 TC 7 Z9 7 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 1077-1204 J9 J ENVIRON SCI HEAL A JI J. Environ. Sci. Health Part A-Environ. Sci. Eng. Toxic Hazard. Subst. Control PY 1992 VL A27 IS 3 BP 843 EP 861 PG 19 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HM111 UT WOS:A1992HM11100017 ER PT J AU WOLFRAM, JH ROGERS, RD HIGDEM, DM AF WOLFRAM, JH ROGERS, RD HIGDEM, DM TI MICROBIAL PROCESSING OF VOLATILE ORGANICS IN INDUSTRIAL-WASTE STREAMS SO JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-ENVIRONMENTAL SCIENCE AND ENGINEERING & TOXIC AND HAZARDOUS SUBSTANCE CONTROL LA English DT Article ID PSEUDOMONAS-PUTIDA; DEGRADATION; TOLUENE; PHENOL AB A strain of Pseudomonas putida has been isolated which tolerates and metabolizes toluene and p-xylene. In our laboratory, this isolate has undergone selection and adaptation and presently is able to grow under a layer of 100% p-xylene. From batch studies the initial rates of degradation are 1-3 mg/min/L. This strain of P. putida also tolerates the presence of a nonionic surfactant while still maintaining its metabolic activity. Preliminary testing using this isolate under chemostat conditions indicates that the potential for developing a bioprocess to treat these waste solvents may be possible. RP WOLFRAM, JH (reprint author), IDAHO NATL ENGN LAB,BIOTECHNOL UNIT,IDAHO FALLS,ID 83415, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 1077-1204 J9 J ENVIRON SCI HEAL A JI J. Environ. Sci. Health Part A-Environ. Sci. Eng. Toxic Hazard. Subst. Control PY 1992 VL A27 IS 4 BP 1115 EP 1125 PG 11 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HT618 UT WOS:A1992HT61800013 ER PT J AU KORTE, NE KEARL, PM GLEASON, TA BEALE, JS AF KORTE, NE KEARL, PM GLEASON, TA BEALE, JS TI THE INADEQUACY OF COMMONLY USED RISK ASSESSMENT GUIDANCE FOR DETERMINING WHETHER SOLVENT-CONTAMINATED SOILS CAN AFFECT GROUNDWATER AT ARID SITES SO JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-ENVIRONMENTAL SCIENCE AND ENGINEERING & TOXIC AND HAZARDOUS SUBSTANCE CONTROL LA English DT Article ID UNSATURATED ZONE AB Commonly used risk assessment guidance is not adequate when applied to solvent-contaminated soils in arid environments. The equations that are recommended for calculating how such soils will affect ground-water assume that liquid phase leaching controls contaminant migration. If vapor phase migration is considered at all, diffusion is assumed to be the dominant process. In contrast, a field study performed at an industrial site in Southern California demonstrated that leaching could not account for the transport of contaminants to the water table and the recent technical literature suggests that gravity-induced vapor migration may be the principal mechanism for vapor phase migration. Thus, regulatory guidance provided by the United States Environmental Protection Agency and the State of California could result in a significant underestimate of the amount of chlorinated solvent that could contaminate the groundwater at arid sites. C1 TA GLEASON & ASSOCIATES,CINCINNATI,OH 45226. ALLIED SIGNAL AEROSP CO,TORRANCE,CA 90509. RP KORTE, NE (reprint author), OAK RIDGE NATL LAB,GRAND JUNCT OFF,GRAND JCT,CO 81502, USA. NR 14 TC 1 Z9 1 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 1077-1204 J9 J ENVIRON SCI HEAL A JI J. Environ. Sci. Health Part A-Environ. Sci. Eng. Toxic Hazard. Subst. Control PY 1992 VL A27 IS 8 BP 2251 EP 2261 PG 11 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA JW621 UT WOS:A1992JW62100015 ER PT J AU SCRIBNER, KT WOOTEN, MC SMITH, MH KENNEDY, PK RHODES, OE AF SCRIBNER, KT WOOTEN, MC SMITH, MH KENNEDY, PK RHODES, OE TI VARIATION IN LIFE-HISTORY AND GENETIC-TRAITS OF HAWAIIAN MOSQUITOFISH POPULATIONS SO JOURNAL OF EVOLUTIONARY BIOLOGY LA English DT Article DE LIFE HISTORY EVOLUTION; GENETIC VARIABILITY; DRIFT; ENVIRONMENTAL VARIATION; MOSQUITOFISH AB Mosquitofish (Gambusia affinis) were collected from 17 reservoirs on three islands in Hawaii, USA. Genetic and life history traits for adult females from these populations were used to evaluate hypotheses concerning short-term evolutionary divergence of populations recently established from a common ancestral source. The effects of founder events and drift on genetic variability and population differentiation were also examined. Significant differences in life history characteristics, allele frequencies, and multi-locus heterozygosities (H) were found among fish populations collected from different reservoirs and between reservoirs classified as stable or fluctuating on the basis of temporal fluctuation in water level. Females from stable reservoirs exhibited greater standard length (35.1 vs 32.8 mm), lower fecundity (11.9 vs 15.2 embryos), lower reproductive allocation (18.2% vs 22.8%), but larger mean embryo size (1.95 vs 1.67 mg) than females from fluctuating reservoirs. Consistency in means among replicates of each reservoir class and concordance in direction and magnitude of differences reported here and results of sampling conducted from these same locations 10 years previously (Stearns, 1983a) suggest that ecological factors intrinsic to these two environments are important in determining population life history traits. Females from stable reservoirs exhibited lower heterozygosity than females from fluctuating reservoirs (0.134 vs 0.158, respectively). Levels and direction of differences in heterozygosity, the high proportion of polymorphic loci and lack of fixation of alternative alleles argue against a purely stochastic explanation for genetic and life history variation among reservoir populations. Levels of genetic variability and interpopulation differentiation were similar to those observed in mainland populations of this species. A high proportion of the genetic diversity was apportioned between populations and within populations due to differences between juveniles and adults. Significant genotypic differences between adult and juvenile age classes suggest that the genetic divergence of local populations may occur over short periods of time. RP SCRIBNER, KT (reprint author), SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29802, USA. NR 0 TC 21 Z9 22 U1 3 U2 5 PU BIRKHAUSER VERLAG AG PI BASEL PA PO BOX 133 KLOSTERBERG 23, CH-4010 BASEL, SWITZERLAND SN 1010-061X J9 J EVOLUTION BIOL JI J. Evol. Biol. PY 1992 VL 5 IS 2 BP 267 EP 288 DI 10.1046/j.1420-9101.1992.5020267.x PG 22 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA HX996 UT WOS:A1992HX99600005 ER PT J AU SHARBER, JR HONES, EW HEELIS, RA CRAVEN, JD FRANK, LA MAYNARD, NC SLAVIN, JA BIRN, J AF SHARBER, JR HONES, EW HEELIS, RA CRAVEN, JD FRANK, LA MAYNARD, NC SLAVIN, JA BIRN, J TI DYNAMICS EXPLORER MEASUREMENTS OF PARTICLES, FIELDS, AND PLASMA DRIFTS OVER A HORSE-COLLAR AURORAL PATTERN SO JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY LA English DT Article ID INTERPLANETARY MAGNETIC-FIELD; POLAR-CAP; CONVECTION PATTERNS; THETA-AURORA; NORTHWARD; MODEL; ARCS; IMF; MAGNETOSPHERE; CURRENTS AB As shown from ground-based measurements and satellite-borne imagers, one type of global auroral pattern characteristic of quiet (usually northward IMF) intervals is that of a contracted but thickened emission region in which the dawn and dusk portions can spread poleward to very high latitudes. Because of its shape, such a pattern has been referred to as a ''horse-collar'' aurora (HONEs et al., 1989). In this report we use the Dynamics Explorer data set to examine a case in which this ''horse-collar'' pattern was observed by the DE-1 auroral imager while at the same time DE-2, at lower altitude, measured precipitating particles, electric and magnetic fields, and plasma drifts. Our analysis shows that in general there is close agreement between the optical signatures and the particle precipitation patterns. In many instances, over scales ranging from tens to a few hundred kilometers, electron precipitation features and upward field-aligned currents are observed at locations where the plasma flow gradients indicate negative del.E. The particle, plasma, and field measurements made along the satellite track and the 2-D perspective of the imager provide a means of determining the configuration of convective flows in the high-latitude ionosphere during this interval of northward IMF. Recent mapping studies are used to relate the low-altitude observations to possible magnetospheric source regions. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV TEXAS,RICHARDSON,TX 75083. UNIV ALASKA,FAIRBANKS,AK 99775. UNIV IOWA,IOWA CITY,IA 52242. PHILLIPS LAB,BEDFORD,MA 01731. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP SHARBER, JR (reprint author), SOUTHWEST RES INST,SAN ANTONIO,TX 78228, USA. RI Slavin, James/H-3170-2012 OI Slavin, James/0000-0002-9206-724X NR 21 TC 3 Z9 3 U1 0 U2 3 PU TERRA SCIENTIFIC PUBL CO PI TOKYO PA 302 JIYUGAOKA-KOMATSU BLDG 24-17 MIDORIGAOKA 2-CHOME, TOKYO TOKYO 152, JAPAN SN 0022-1392 J9 J GEOMAGN GEOELECTR JI J. Geomagn. Geoelectr. PY 1992 VL 44 IS 12 BP 1225 EP 1237 PG 13 WC Geosciences, Multidisciplinary SC Geology GA KR076 UT WOS:A1992KR07600009 ER PT J AU HANSEN, JD MORALES, GJ DUNCAN, LM DIMONTE, G AF HANSEN, JD MORALES, GJ DUNCAN, LM DIMONTE, G TI LARGE-SCALE HF-INDUCED IONOSPHERIC MODIFICATIONS - EXPERIMENTS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID RADIO-WAVES; CAVITIES; POWER AB Experimental investigations of large-scale modifications created by a high-power HF beam (effective radiated power of approximately 100 MW, frequency of 3-5 MHz) in the nighttime ionosphere above Arecibo Observatory are presented. The modifications consist of field-aligned temperature enhancements (delta-T(e)/T(e0) approximately 2-4) and density depletions (\delta-n(e)\/n(e0) approximately 25-50%) and have length scales along the geomagnetic field of tens of kilometers. A two-stage time evolution of the modifications is documented; they start from a broad and symmetric perturbation and develop into a narrow, northward shifted universal steady state on a time scale of 15-30 min. It is found that nonlinear refraction, i.e., the self-consistent bending of the O mode HF beam across the geomagnetic field lines and the reorientation of the HF reflection surface to a geometry parallel to the geomagnetic field, is the key process involved in the generation of the large modifications. Preconditioning results showing the immediate onset of the narrow late-stage behavior provide dramatic confirmation of the underlying nonlinear mechanism sustaining the large modifications. Highlights of quantitative comparisons of these observations with a transport model including nonlinear refraction have been given in a previous publication (Hansen et al., 1990). C1 CLEMSON UNIV,CLEMSON,SC 29634. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP HANSEN, JD (reprint author), UNIV CALIF LOS ANGELES,DEPT PHYS,405 HILGARD AVE,LOS ANGELES,CA 90024, USA. NR 13 TC 26 Z9 27 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JAN 1 PY 1992 VL 97 IS A1 BP 113 EP 122 DI 10.1029/91JA02403 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA GY568 UT WOS:A1992GY56800010 ER PT J AU MCCOMAS, DJ GOSLING, JT PHILLIPS, JL AF MCCOMAS, DJ GOSLING, JT PHILLIPS, JL TI INTERPLANETARY MAGNETIC-FLUX - MEASUREMENT AND BALANCE SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID SOLAR-WIND; FIELD; PIONEER-11; GRADIENTS; CYCLE-21; EVENTS; 1-AU; IMF AB We have developed a new method for determining the approximate magnetic flux content of various solar wind structures in the ecliptic plane, using single-spacecraft measurements. The two-dimensional magnetic flux in a region of the solar wind is given by the integral of the radial magnetic field component over an arc perpendicular to the radial. Unfortunately, such measurements cannot be achieved with single (or even several) spacecraft in the solar wind. We will show that the desired two-dimensional, ecliptic plane magnetic flux integral, at least for regions with simple magnetic topologies, is equivalent to phi = integral B(y)\v\dt, where B(y) is the ecliptic plane field component perpendicular to the solar wind velocity vector v. Thus phi can be determined entirely from measured quantities. In this study we examine variations in the magnetic flux in the ecliptic plane over a 16-year interval. In addition, we address the question of the opening and closing of interplanetary magnetic flux by comparing the ecliptic plane flux content of both coronal mass ejections (CMEs) and heat flux dropouts (HFDs). If CMEs remain at least partially attached to the Sun, they would serve to open new magnetic flux to the interplanetary medium. In contrast, flux could be closed off by reconnection across helmet streamers in the corona, leading to the release of U-shaped magnetic structures open to the outer heliosphere at both ends and to the return of closed arches to the Sun. One interpretation of HFDs in the solar wind halo electron population is that they represent the interplanetary signatures of such disconnected U-shaped structures. The ecliptic plane flux of CMEs is determined to be approximately 4 times greater than that of HFDs over the 18-month interval studied; complications of making such comparisons are discussed. RP MCCOMAS, DJ (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,SPACE PLASMA PHYS GRP,LOS ALAMOS,NM 87545, USA. NR 25 TC 44 Z9 44 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JAN 1 PY 1992 VL 97 IS A1 BP 171 EP 177 DI 10.1029/91JA02370 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA GY568 UT WOS:A1992GY56800016 ER PT J AU LESHT, BM BRANDNER, DJ AF LESHT, BM BRANDNER, DJ TI FUNCTIONAL REPRESENTATION OF GREAT-LAKES SURFACE TEMPERATURES SO JOURNAL OF GREAT LAKES RESEARCH LA English DT Article DE WATER TEMPERATURE; STATISTICAL MODELS; WEATHER DATA COLLECTIONS; CLIMATOLOGY; GREAT LAKES ID THERMAL STRUCTURE; MICHIGAN AB We have fitted a continuous parametric function to daily averages of lake surface (depth 1 m) temperature measurements made at buoys deployed since 1979 in the Great Lakes by the National Data Buoy Center. The function, which is based on the Johnson S(U) probability distribution, successfully reproduces the major features of the observed annual surface temperature cycle including gradual warming from winter minimum to the onset of spring stratification, rapid warming to mid-summer peak, and slow cooling to winter minimum. Best fit parameters describing the observed average annual temperature cycles vary in a reasonable way with latitude and water depth. Although year-to-year variations in the temperature cycles can be large, the root-mean-squared differences between the fitted functions and the averaged buoy observations are on the order of a few tenths of a degree C. While no trend in lake surface temperatures is evident over the past 10 years, the effects of climatologically abnormal years can be seen in the observed data. The functional representations of lake surface temperature will be useful for computer simulations of bio-geochemical processes in the Great Lakes and for evaluations of climatological departures from typical conditions. RP LESHT, BM (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,ATMOSPHER SECT,ARGONNE,IL 60439, USA. OI Lesht, Barry/0000-0003-0801-4290 NR 18 TC 10 Z9 10 U1 0 U2 0 PU INT ASSOC GREAT LAKES RES PI ANN ARBOR PA 2200 BONISTEEL BLVD, ANN ARBOR, MI 48109-2099 SN 0380-1330 J9 J GREAT LAKES RES JI J. Gt. Lakes Res. PY 1992 VL 18 IS 1 BP 98 EP 107 PG 10 WC Environmental Sciences; Limnology; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA HP681 UT WOS:A1992HP68100010 ER PT J AU YAMAGUCHI, Y TOMIYOSHI, S HARADA, M SHIRANE, G AF YAMAGUCHI, Y TOMIYOSHI, S HARADA, M SHIRANE, G TI MAGNONS AND PHONONS IN MNSB SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID ELECTRONIC STATE; MNAS AB Magnon and phonon dispersion relations in a ferromagnet MnSb of NiAs-type crystal structure are measured using neutron spectroscopy. The results are compared with the recent calculation of magnon dispersion based on the spin fluctuation theory. The magnitude of the exchange interaction between neighboring magnetic atoms is obtained as the ratio of the interaction. Phonon dispersion of MnSb shows that there is tendency of the crystal transformation to MnP-type structure. C1 UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP YAMAGUCHI, Y (reprint author), TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 980,JAPAN. NR 8 TC 3 Z9 3 U1 0 U2 3 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 JAN PY 1992 VL 103 IS 1-2 BP 50 EP 52 DI 10.1016/0304-8853(92)90234-F PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GZ481 UT WOS:A1992GZ48100009 ER PT J AU TANOUE, S GSCHNEIDNER, KA MCCALLUM, RW AF TANOUE, S GSCHNEIDNER, KA MCCALLUM, RW TI A STUDY OF THE MAGNETIC-PROPERTIES OF GD3PD4 IN APPLIED MAGNETIC-FIELDS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID HEAT-CAPACITY; ALLOYS; GADOLINIUM; REFRIGERATION; DYSPROSIUM; PALLADIUM; HOLMIUM AB The low temperature heat capacity and magnetic susceptibility were measured on alloys of the Gd3Pd4 and Gd4Pd5 compositions. The Gd4Pd5 sample was found to be a two phase alloy consisting of Gd3Pd4 and Gd3Pd4-GdPd eutectic. The Gd3Pd4 compound was confirmed to be antiferromagnetic with a Neel temperature of 18 K. Another magnetic transition was observed almost-equal-to 6 K which has characteristics of ferromagnetic or ferrimagnetic ordering. In applied magnetic fields up to 9.85 T, a heat capacity peak developed at almost-equal-to 13 K while the 18 K peak shifted to lower temperatures in fields > 5.3 T. The entropy associated with the 13 K anomaly was estimated to be less than 2% of total magnetic entropy. The origin of this anomaly was thought to be due to some type of spin reorientation of some (few) of the antiferromagnetic moments in the applied field. The low temperature heat capacities of La3Pd4 and LU3Pd4 were also measured. The electronic specific heat coefficients were found to be 10.5 and 5.72 mJ/mol K2, respectively, and the Debye temperatures are 171 and 191 K, respectively. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. RP TANOUE, S (reprint author), SUMITOMO MET IND LTD,DIV RES & DEV,AMAGASAKI,HYOGO 660,JAPAN. NR 17 TC 4 Z9 4 U1 0 U2 2 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 JAN PY 1992 VL 103 IS 1-2 BP 129 EP 138 DI 10.1016/0304-8853(92)90246-K PG 10 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GZ481 UT WOS:A1992GZ48100021 ER PT J AU GANGOPADHYAY, AK LETTAU, K LETTAU, C SCHILLING, JS SCHUBERTH, E FUCHS, W ANDRES, K DAMENTO, M GSCHNEIDNER, KA AF GANGOPADHYAY, AK LETTAU, K LETTAU, C SCHILLING, JS SCHUBERTH, E FUCHS, W ANDRES, K DAMENTO, M GSCHNEIDNER, KA TI LONG-RANGE MAGNETIC ORDER IN CE(CU1-XAGX)6 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID HEAVY-FERMION SYSTEMS; ELECTRICAL-RESISTIVITY; CECU6; PRESSURE; CAPACITY; STATE AB In Ce(Cu1-xAgx)6 new results are reported on the electrical resistivity rho(T) (1.3 less-than-or-equal-to T less-than-or-equal-to 300 K) and the lattice parameters at room temperature for x less-than-or-equal-to 0.20, on the heat capacity C(T) (50 mK less-than-or-equal-to T less-than-or-equal-to 4 K) for x = 0.15 and 0.20, and on C(T) (1.5 less-than-or-equal-to T less-than-or-equal-to 20 K) in magnetic fields to 9.8 T for x = 0.1. Sharp anomalies in C(T) for x = 0.15 and 0.20 and in rho(T) for x = 0.20 near the magnetic ordering temperatures determined in earlier susceptibility studies conform the long-range nature of the magnetic transitions in this system. With increasing x the resistivity maximum is shifted to lower temperatures and the lattice expands; it is argued that this volume expansion is primarily responsible for a decrease in the effective Kondo interaction relative to the magnetic exchange interaction between Ce-moments which in turn leads to long-range magnetic order in this system. For x = 0.10 the observed increase in C(T) as a function of magnetic field over the temperature range studied (1.5-20 K) is shown to follow directly from the anticipated behavior of a local-moment system. C1 UNIV MUNICH,SEKT PHYS,W-8000 MUNICH 40,GERMANY. WALTHER MEISSNER INST TIEFTEMP FORSCH,W-8046 GARCHING,GERMANY. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. NR 27 TC 5 Z9 5 U1 0 U2 1 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 JAN PY 1992 VL 103 IS 3 BP 267 EP 273 DI 10.1016/0304-8853(92)90199-X PG 7 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA HG242 UT WOS:A1992HG24200008 ER PT J AU BRUBAKER, ME MOOG, ER SOWERS, CH ZAK, J BADER, SD AF BRUBAKER, ME MOOG, ER SOWERS, CH ZAK, J BADER, SD TI TRANSVERSE MAGNETOOPTIC KERR EFFECT IN ULTRATHIN FILMS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Letter ID LAYERED STRUCTURES; SMOKE SIGNALS; ANISOTROPY; FE; SURFACE; CU(100); TEMPERATURE; MONOLAYER; AG(100); PD/CO AB The behavior of the magneto-optic Kerr effect is simulated for ultrathin Fe/Au overlayers and superlattices with magnetization direction varying from polar to transverse configurations. The simulations are based on a general macroscopic formalism, introduced previously, that can treat arbitrary directions of the magnetization, and that utilizes tabulated bulk optical and magneto-optical parameters. Simulations for Co overlayers on Cu are also presented and compared to published transverse Kerr effect data for monolayer-range Co/Cu(100). Transverse Kerr effect measurements at the He-Ne wavelength are presented for a series of approximately 500 A thick. sputtered Fe/Mo superlattices, whose component layer thicknesses are fixed at 25 A of Fe, and range from 4 to 36 A for the Mo layers. The Co/Cu and Fe/Mo data are compared to simulation to evaluate the applicability of the macroscopic approach to describe the ultrathin regime. C1 TECHNION ISRAEL INST TECHNOL,DEPT PHYS,HAIFA,ISRAEL. RP BRUBAKER, ME (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013 NR 27 TC 7 Z9 7 U1 0 U2 4 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 JAN PY 1992 VL 103 IS 1-2 BP L7 EP L12 DI 10.1016/0304-8853(92)90227-F PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GZ481 UT WOS:A1992GZ48100002 ER PT J AU HONG, T FREEMAN, AJ AF HONG, T FREEMAN, AJ TI EFFECT OF STOICHIOMETRY ON THE STRUCTURAL-PROPERTIES AND THE ELECTRONIC-STRUCTURE OF INTERMETALLICS - ANTIPHASE BOUNDARY ENERGIES IN FEAL AND NIAL SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID BAND-STRUCTURE; AL ALLOYS; SLIP AB As a possible means of alleviating the severe brittleness in the B2 compounds FeAl and NiAl, the all-electron self-consistent total energy linear muffin-tin orbital (LMTO) method was employed to investigate the possibility of lowering the <111> anti-phase boundary (APB) energies by changing compositions in FeAl and NiAl. For APB's created in the regions with excess Fe (or Ni) atoms, APB energies for the model systems, Fe0.6Al0.4 and Ni0.6Al0.4, were found to be one order of magnitude smaller than those for stoichiometric B2 FeAl and NiAl, respectively. Apparently, the activation of [111] slip became possible in these cases. On the other hand, the APB energies remained at about the same as those in stoichiometric FeAl and NiAl for APB's occurring in regions with equal numbers of Fe (Ni) and Al atoms, implying that the activation of [111] slip in these regions was not eased. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP HONG, T (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 44 TC 13 Z9 16 U1 1 U2 3 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JAN PY 1992 VL 7 IS 1 BP 68 EP 79 DI 10.1557/JMR.1992.0068 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA GY377 UT WOS:A1992GY37700013 ER PT J AU BRIMHALL, JL CHARLOT, LA BRUEMMER, SM AF BRIMHALL, JL CHARLOT, LA BRUEMMER, SM TI PHASE FORMATION AND STABILITY IN SPUTTER DEPOSITED BE-NB COMPOUNDS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CRYSTALLIZATION; SYSTEM; ZR AB The phase relations and thermal stabilities of phases in sputter deposited Be-Nb alloys (3-14% Nb) have been studied. An amorphous phase forms during deposition at ambient temperatures (30-degrees-C) for compositions > 5% Nb. Metastable crystalline phases form during deposition at 350-450-degrees-C as well as during annealing of the amorphous phase. One metastable bcc phase designated as Be12Nb' can be explained by an extremely high fault density in the Be12Nb structure and is a precursor phase to the formation of both Be12Nb and Be17Nb2. Another metastable bcc phase also forms during high temperature deposition. Transformation to the equilibrium phases occurs at temperatures > 800-degrees-C. A stoichiometric range of about 5.5-7.8% is indicated for the Be12Nb phase and is probably due to vacancies on the Nb sublattice. No evidence of a Be5Nb phase was found and the Be17Nb2 phase is stable to room temperature. RP BRIMHALL, JL (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 22 TC 0 Z9 0 U1 1 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JAN PY 1992 VL 7 IS 1 BP 89 EP 99 DI 10.1557/JMR.1992.0089 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA GY377 UT WOS:A1992GY37700016 ER PT J AU UNAL, O PETROVIC, JJ MITCHELL, TE AF UNAL, O PETROVIC, JJ MITCHELL, TE TI CVD SI3N4 ON SINGLE-CRYSTAL SIC .1. CHARACTERIZATION AND ORIENTATION RELATIONSHIP AT THE INTERFACE SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID DEPOSITED SILICON-NITRIDE AB Si3N4 deposited by CVD on the (111BAR) surface of single crystal SiC was studied by SEM, x-ray diffraction, and TEM techniques. Characterization of the thick Si3N4 deposit was made by SEM and x-ray diffraction. The main emphasis, however, was on the analysis of the Si3N4/SiC interface and this analysis was carried out by electron diffraction studies in TEM. Both x-ray diffraction and TEM studies revealed that the CVD Si3N4 deposit has almost entirely the alpha-form except for occasional large beta-crystals. The structure of the SiC substrate in the interior was 6H but the surface structure close to the interface was always microtwinned beta. Diffraction studies of the bulk Si3N4 deposit showed not only the presence of preferred growth directions but also different growth orientations near the substrate interface. TEM investigations at the interface also revealed that preferred growth orientations at the Si3N4/SiC interface are different from those in the bulk. The prominent orientation relationship at the interface is [0001]Si3N4//[101]SiC; (101BAR0)Si3N4//(111BAR)SiC; a second one, namely [12BAR10]Si3N4//[101]SiC; (101BAR0)Si3N4//(111BAR)SiC relationship was also occasionally observed. Microindentation tests at the interface indicated that the Si3N4/SiC interface bonding is strong at ambient temperatures but weakens at high temperatures. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP UNAL, O (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. NR 19 TC 11 Z9 11 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JAN PY 1992 VL 7 IS 1 BP 136 EP 147 DI 10.1557/JMR.1992.0136 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA GY377 UT WOS:A1992GY37700022 ER PT J AU WANG, L WADA, H ALLARD, LF AF WANG, L WADA, H ALLARD, LF TI SYNTHESIS AND CHARACTERIZATION OF SIC WHISKERS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID SILICON-CARBIDE WHISKERS; GROWTH; ALUMINUM AB SiC whiskers were synthesized by the carbothermal reduction of silica with an addition of halide (3NaF.AlF3 or NaF) as an auxiliary bath. The whiskers were beta-phase (3C) and grew in the [111] direction. Three distinctive morphologies were observed: (1) Type A: thin and straight; (2) Type B: thick and bamboo-like; and (3) Type C: thick, straight, and smooth. Type A whiskers contained a high density of basal plane (111) stacking faults along their entire length, whereas Type B whiskers showed periodic changes between stacking faults and well-defined single crystals. Type C whiskers showed stacking faults on the other {111} planes instead of on the basal (111) plane. Silica formed molten fluorosilicate with halide and SiC grew via a vapor-solid reaction mechanism through gaseous SiO. These reactions can be expressed as (SiO2) + C (S) = SiO (g) + CO (g) and SiO (g) + 3CO (g) = SiC (s) + 2CO2 (g). The effects of processing parameters on the morphology and size of the whiskers were examined and the relationship between the morphological development of the whiskers and the stacking fault energy was determined. C1 OAK RIDGE NATL LAB,HIGH TEMP MAT LAB,OAK RIDGE,TN 37831. RP WANG, L (reprint author), UNIV MICHIGAN,DEPT MAT SCI & ENGN,ANN ARBOR,MI 48109, USA. NR 46 TC 102 Z9 106 U1 3 U2 15 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JAN PY 1992 VL 7 IS 1 BP 148 EP 163 DI 10.1557/JMR.1992.0148 PG 16 WC Materials Science, Multidisciplinary SC Materials Science GA GY377 UT WOS:A1992GY37700023 ER PT J AU NUTT, GL AF NUTT, GL TI FINITE-ELEMENT SIMULATION OF EXFOLIATION EXPERIMENTS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID INTERFACE; STRENGTH AB We previously reported bond strength measurements of metal/ceramic interfaces using shock waves to separate the bond by spallation.1,2 The technique relies on interpretation of the free surface velocity of a metal film as it is spalled from its substrate. A number of questions have been raised concerning the details of the interaction of the shock and interface. We provide answers by numerically modeling the experiments. We rederive the relationship between the maximum stress at the bond interface and the free surface velocity of the metal overlayer. We compare the analytical result with numerical calculations based on less restrictive assumptions, thereby supporting the analysis. We illustrate important design considerations of the experiment with numerical calculation and in the process, evaluate the effect of the artificial damping on the numerical results. RP NUTT, GL (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 18 TC 7 Z9 7 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JAN PY 1992 VL 7 IS 1 BP 203 EP 213 DI 10.1557/JMR.1992.0203 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA GY377 UT WOS:A1992GY37700030 ER PT J AU POWELL, GLF LAIRD, G AF POWELL, GLF LAIRD, G TI STRUCTURE, NUCLEATION, GROWTH AND MORPHOLOGY OF SECONDARY CARBIDES IN HIGH CHROMIUM AND CR-NI WHITE CAST IRONS SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID LIQUIDUS SURFACE; EQUILIBRIA; ALLOYS AB Heat-treated high chromium and Cr-Ni white cast irons are widely used by the mining and mineral industries for impact and abrasion resistance. With certain heat treatments, Fe-Cr carbides are precipitated within the chromium- and carbon-rich austenitic matrix, thereby destabilizing the austenite which transforms substantially to martensite on subsequent cooling. The crystal structures of these carbides were determined indirectly by referring electron microprobe analyses of the austenitic matrix to the appropriate isothermal solid-state sections of the Fe-Cr-C phase diagram and directly by microprobe analyses of exposed secondary carbides. The nucleation, growth and morphology of these carbides were studied by a combination of selective removal of the austenitic matrix and subsequent scanning electron microscopy of the exposed carbides. C1 US BUR MINES, ALBANY RES CTR, ALBANY, OR 97321 USA. RP CSIRO, DIV MFG TECHNOL, POB 4, WOODVILLE, SA 5051, AUSTRALIA. NR 24 TC 43 Z9 44 U1 2 U2 8 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-2461 EI 1573-4803 J9 J MATER SCI JI J. Mater. Sci. PD JAN 1 PY 1992 VL 27 IS 1 BP 29 EP 35 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA HA170 UT WOS:A1992HA17000005 ER PT J AU SUGAMA, T GRAY, G KUKACKA, LE AF SUGAMA, T GRAY, G KUKACKA, LE TI ALKALI CARBONATION OF AUTOCLAVED POLYMER CEMENT COMPOSITES IN NA2CO3-LADEN WATER AT 300-DEGREES-C SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID HIGH ALUMINA CEMENT; GEOTHERMAL GROUTS; CO2 ATTACK AB Well cements resistive to high-temperature (approximately 300-degrees-C) brines containing carbon dioxide (CO2) are needed for use in the completion of geothermal wells. Recent attempts to complete wells through aquifers containing approximately 1000 p.p.m. concentrations of CO2 at approximately 130-degrees-C have shown severe deterioration of all conventional cement systems, with resulting cement and casing failures after only 90 days in service. As part of an ongoing research programme to develop hydrothermally and CO2-resistant cement formulations, studies were performed to determine the rate of alkali carbonation of autoclave-treated polymer-calcium aluminate cement composites upon exposure to Na2CO3-laden water at 300-degrees-C. The results indicated that the formation of a calcium-complexed carboxylate polymer structure, resulting from the addition of an acrylic polymer in the cement, improved the compressive strength of the composite after a 1 day autoclave exposure, and minimized the carbonation rate over 30 days. However, biccholite --> wairakite and triclinic --> hexagonal anorthite transformations resulted in strength degradation after exposure for times up to 30 days. The polymer system found to be most effective for minimizing strength degradation and carbonation reactions was a carboxylated styrene-butadiene copolymer. RP SUGAMA, T (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV ENERGY EFFICIENCY & CONSERVAT,UPTON,NY 11973, USA. NR 17 TC 3 Z9 3 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD JAN 1 PY 1992 VL 27 IS 1 BP 180 EP 190 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA HA170 UT WOS:A1992HA17000026 ER PT J AU SMITH, AE ACHREMOWICZ, B KARKARE, MV TANNER, RD WOODWARD, J AF SMITH, AE ACHREMOWICZ, B KARKARE, MV TANNER, RD WOODWARD, J TI CONCENTRATING CELLULASE FROM A WATER SOLUTION ONTO WATER DROPLETS IN AIR SO JOURNAL OF MICROBIAL BIOTECHNOLOGY LA English DT Article AB Shaking an enzyme solution of cellulase (Maxazyme CL; Gist Brocades NV) in a separatory funnel causes the protein to be concentrated from 5 to 30 times in the created vapor droplet phase, as measured by the Bradford Coomassie Blue Dye Method. To place this result within the context of separating other proteins using this method, a comparison was made between cellulase and three other proteins: alcohol dehydrogenase (ADH), alpha-amylase (bacterial), and bovine serum albumin (BSA). All of these proteins have different solubilities and apparently also differ with regard to their ability to Partition between the vapor droplet phase and the bulk water phase. Maximum partition coefficients (K) ranged between 30 for cellulase to 600 for ADH forl ow initial bulk concentrations. In addition to qualitative differences in solubilities, surface tensions of the four protein solutions were compared to see if variations in the partition coefficients could be correlated with changes in surface tension. ADH, a very soluble protein was the most surface active among the proteins studied. with surface tension values ranging between 72.6 and 65.8 dynes/cm in the concentration range of 0-100 mg/L. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN. RP SMITH, AE (reprint author), VANDERBILT UNIV,NASHVILLE,TN 37240, USA. NR 7 TC 3 Z9 3 U1 0 U2 0 PU JOURNAL OF MICROBIAL BIOTECHNOLOGY PI KANPUR PA C/O SUBODH SAXENA 804 AVADHPURI-LAKHANPUR, KANPUR 208 024, INDIA SN 0256-8551 J9 J MICROBIAL BIOTECH JI J. Microb. Biotechnol. PD JAN-JUN PY 1992 VL 7 IS 1 BP 9 EP 17 PG 9 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA KV886 UT WOS:A1992KV88600002 ER PT J AU BUDINGER, TF AF BUDINGER, TF TI CRITICAL-REVIEW OF PET, SPECT AND NEURORECEPTOR STUDIES IN SCHIZOPHRENIA SO JOURNAL OF NEURAL TRANSMISSION-GENERAL SECTION LA English DT Article; Proceedings Paper CT WORKSHOP ON THE ADVANCES IN NEUROSCIENCE AND SCHIZOPHRENIA CY MAY 06, 1991 CL UNIV PITTSBURGH, PITTSBURGH, PA SP UNIV PITTSBURGH, DEPT PSYCHIAT, UNIV PITTSBURGH, DEPT BEHAV NEUROSCI, UNIV PITTSBURGH, CTR NEUROSCI, LILLY, SANDOZ, UPJOHN, WYETH AYERST HO UNIV PITTSBURGH AB Hypotheses having to do with the neurochemical basis for mental disease can be tested by noninvasive measurement of flow, metabolism and neuroreceptor concentrations in various parts of the brain. The capabilities of these technologies for accurate absolute quantitation are limited by the instrument resolution and the limited statistics associated with allowable radiation doses. Nevertheless, very important new information regarding the brain function in normal and diseased states can be gleaned from the techniques of positron emission tomography (PET) and single photon emission tomography (SPECT). This chapter presents the critical problems which face the clinical researcher who endeavors to test hypotheses regarding mental illnesses using PET or SPECT. First, the quantitative capabilities of emission tomography will be discussed: then the special requirements of SPECT for attenuation correction will be reviewed. Next, the physiological principles required for inter-institutional comparisons are presented. RP BUDINGER, TF (reprint author), LAWRENCE BERKELEY LAB,MS 55-127,BERKELEY,CA 94720, USA. NR 4 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG WIEN PI VIENNA PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 VIENNA, AUSTRIA SN 0300-9564 J9 J NEURAL TRANSM-GEN JI J. Neural Transm.-Gen. Sect. PY 1992 SU 36 BP 3 EP 12 PG 10 WC Neurosciences SC Neurosciences & Neurology GA JK968 UT WOS:A1992JK96800002 ER PT J AU DAVID, D HOLM, DD AF DAVID, D HOLM, DD TI MULTIPLE LIE-POISSON STRUCTURES, REDUCTIONS, AND GEOMETRIC PHASES FOR THE MAXWELL-BLOCH TRAVELING-WAVE EQUATIONS SO JOURNAL OF NONLINEAR SCIENCE LA English DT Article AB The real-valued Maxwell-Bloch equations on R3 are investigated as a Hamiltonian dynamical system obtained by applying an S1 reduction to an invariant subsystem of a dynamical system on C3. These equations on R3 are bi-Hamiltonian and possess several inequivalent Lie-Poisson structures parametrized by classes of orbits in the group SL(2, R). Each Lie-Poisson structure possesses an associated Casimir function. When reduced to level sets of these functions, the motion takes various symplectic forms, from that of the pendulum to that of the Duffing oscillator. The values of the geometric (Hannay-Berry) phases obtained in reconstructing the solutions are found to depend upon the choice of Casimir function, that is, upon the parametrization of the reduced symplectic space. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP DAVID, D (reprint author), SO METHODIST UNIV,DEPT MATH,DALLAS,TX 75275, USA. NR 12 TC 28 Z9 28 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-8974 J9 J NONLINEAR SCI JI J. Nonlinear Sci. PY 1992 VL 2 IS 2 BP 241 EP 262 DI 10.1007/BF02429857 PG 22 WC Mathematics, Applied; Mechanics; Physics, Mathematical SC Mathematics; Mechanics; Physics GA HU327 UT WOS:A1992HU32700004 ER PT J AU KLUEH, RL ALEXANDER, DJ MAZIASZ, PJ AF KLUEH, RL ALEXANDER, DJ MAZIASZ, PJ TI IMPACT BEHAVIOR OF REDUCED-ACTIVATION FERRITIC STEELS IRRADIATED IN THE FAST FLUX TEST FACILITY SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID CR-W STEELS AB Reduced-activation Cr-W steels with chromium concentrations varying from 2.25 to 12 wt% were irradiated at 365-degrees-C to approximately 7 dpa in the Fast Flux Test Facility. Irradiation caused a loss of toughness for all steels, as measured in Charpy impact tests; increases in the ductile-brittle transition temperature (DBTT) and decreases in the upper-shelf energy were observed after irradiation. Two steels with 9% Cr showed the greatest resistance to the effects of irradiation: the DBTT of a 9% Cr steel with 2% W and 0.25% V increased by 68-degrees-C during irradiation; this same composition with an addition of 0.07% Ta developed an increase in DBTT of only 4-degrees-C. These shifts in DBTT compared to increases of over 100-degrees-C for the rest of the steels. Observations on the steels with 2.25% Cr indicated that a steel containing a combination of 2% W and 0.25% V was less severely affected by irradiation than steels with vanadium and no tungsten, tungsten and no vanadium, or with 1% W and 0.25% V. RP KLUEH, RL (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. OI Maziasz, Philip/0000-0001-8207-334X NR 14 TC 19 Z9 19 U1 0 U2 4 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 JAN PY 1992 VL 186 IS 2 BP 185 EP 195 DI 10.1016/0022-3115(92)90333-G PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA GX209 UT WOS:A1992GX20900008 ER PT J AU STOLLER, RE ODETTE, GR AF STOLLER, RE ODETTE, GR TI RECOMMENDATIONS ON DAMAGE EXPOSURE UNITS FOR FERRITIC STEEL EMBRITTLEMENT CORRELATIONS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Letter C1 UNIV CALIF SANTA BARBARA,DEPT CHEM & NUCL ENGN,SANTA BARBARA,CA 93106. RP STOLLER, RE (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. RI Stoller, Roger/H-4454-2011 NR 5 TC 12 Z9 12 U1 0 U2 4 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 JAN PY 1992 VL 186 IS 2 BP 203 EP 205 DI 10.1016/0022-3115(92)90335-I PG 3 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA GX209 UT WOS:A1992GX20900010 ER PT J AU STABIN, M TAYLOR, A ESHIMA, D WOOTER, W AF STABIN, M TAYLOR, A ESHIMA, D WOOTER, W TI RADIATION-DOSIMETRY FOR TECHNETIUM-99M-MAG3, TECHNETIUM-99M-DTPA, AND IODINE-131-OIH BASED ON HUMAN BIODISTRIBUTION STUDIES SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article ID IMPAIRED RENAL-FUNCTION; TC-99M MERCAPTOACETYLTRIGLYCINE; I-131 ORTHOIODOHIPPURATE; KIT FORMULATION; MAG3; VOLUNTEERS; HIPPURAN; AGENTS; OIH AB Radiation dose estimates were calculated for the renal agents Tc-99m-DTPA, Tc-99m-MAG3, and I-131-OIH from biodistribution data gathered in groups of healthy human volunteers. Biokinetics were evaluated by Anger camera imaging, blood sampling, and urine collection and counting. Collected data were fit to four- or five-compartmental models using the CONversational Simulation, Analysis, and Modeling (CONSAM) software. Radiation dose estimates were performed using standard MIRD techniques. Average residence times in urinary bladder, kidney, and remainder of the body were used to predict radiation dose equivalents and effective dose equivalents for the three agents. Doses for DTPA and MAG3 were very similar and much lower on a per unit injected activity than OIH. The effective dose equivalents were 3.3 mSv/370 MBq for Tc-99m-DTPA, 3.7 mSv/370 MBq for Tc-99m-MAG3, and 0.99 mSv/11.1 MBq for I-131-OIH for bladder voiding every 4.8 hr; effective dose equivalents were 2.0 mSv/370 MBq for Tc-99m-DTPA, 1.5 mSv/370 MBq for Tc-99m-MAG3, and 0.28 mSv/11.1 MBq for I-131-OIH for bladder voiding at 30 min and then every 4.0 hr. Patients should void at the conclusion of the study, as early voiding can reduce the gonadal radiation dose by a factor of 2 to 3. C1 EMORY UNIV HOSP,DEPT RADIOL,1364 CLIFTON RD NE,ATLANTA,GA 30322. OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,OAK RIDGE,TN 37830. UNIV NEW MEXICO,COLL PHARM RADIOPHARM,ALBUQUERQUE,NM 87131. UNIV CALIF SAN FRANCISCO,ST AGNES MED CTR,FRESNO,CA. FU NIDDK NIH HHS [DK 38842-04] NR 23 TC 41 Z9 41 U1 2 U2 4 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD JAN PY 1992 VL 33 IS 1 BP 33 EP 40 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA GY676 UT WOS:A1992GY67600013 PM 1530968 ER PT J AU KARONIS, NT AF KARONIS, NT TI TIMING PARALLEL PROGRAMS THAT USE MESSAGE PASSING SO JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING LA English DT Article RP KARONIS, NT (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0743-7315 J9 J PARALLEL DISTR COM JI J. Parallel Distrib. Comput. PD JAN PY 1992 VL 14 IS 1 BP 29 EP 36 DI 10.1016/0743-7315(92)90095-5 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA GY562 UT WOS:A1992GY56200003 ER PT J AU RADLER, MJ COHEN, JB SYKORA, GP MASON, T ELLIS, DE FABER, J AF RADLER, MJ COHEN, JB SYKORA, GP MASON, T ELLIS, DE FABER, J TI THE DEFECT STRUCTURES OF MN1-XO SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article DE MANGANOUS OXIDE; OXIDES; TRANSITION METAL OXIDES; DEFECTS IN OXIDES; DEFECT CLUSTERS IN OXIDES; ELECTRICAL CONDUCTIVITY IN OXIDES; MANGANOSITE ID CATION SELF-DIFFUSION; WUSTITE; MNO; CLUSTERS; MN-1-DELTA-O; TRANSPORT; MANGANESE; FE1-XO; OXIDE; TIO AB In situ neutron powder diffraction patterns analyzed by the Rietveld technique show no interstitial occupation for 0 < x < 0.05 at 1673 K. At a larger deviation from stoichiometry, x = 0.09, an interstitial occupation of 2(1) pct. has been measured, similar to that observed for Fe1-xO at 1323 K. The vacancy interstitial ratio of 5.5 is indicative of a mixture of small cation vacancy clusters and unassociated cation vacancies. New theoretical results indicate that the oxygen shell around a defect cluster expands to help stablize the cluster. In situ X-ray single crystal diffraction studies of Mn1-xO (0 < x < 0.056) at 1573 K show no superstructure peaks or diffuse maxima in reciprocal space where maxima are observed for Fe1-xO. By comparison with the absolute intensities from diffuse scattering in Fe1-xO it is evident that even a small degree of cluster ordering should have been visible, even at 1573 K. This information is employed to model new measurements of conductivity at large deviations from stoichiometry. C1 NORTHWESTERN UNIV,MCCORMICK SCH ENGN & APPL SCI,DEPT MAT SCI & ENGN,EVANSTON,IL 60208. NORTHWESTERN UNIV,COLL ARTS & SCI,DEPT PHYS,EVANSTON,IL 60208. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NR 42 TC 20 Z9 20 U1 1 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD JAN PY 1992 VL 53 IS 1 BP 141 EP 154 DI 10.1016/0022-3697(92)90022-6 PG 14 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA GY660 UT WOS:A1992GY66000020 ER PT J AU DIENES, GJ COX, DE AF DIENES, GJ COX, DE TI DAMASK,ARTHUR,C. RETIRES AS EDITOR SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Item About an Individual C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD JAN PY 1992 VL 53 IS 1 BP R5 EP R5 PG 1 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA GY660 UT WOS:A1992GY66000001 ER PT J AU PATIL, PG AF PATIL, PG TI UNITED-STATES-DEPARTMENT-OF-ENERGY FUEL-CELL PROGRAM FOR TRANSPORTATION APPLICATIONS SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 2ND GROVE FUEL CELL SYMP : PROGRESS IN FUEL CELL COMMERCIALISATION CY SEP 24-27, 1991 CL LONDON, ENGLAND AB Fuel cells offer promise as the best future replacement for internal combustion engines in transportation applications. Fuel cells operate more efficiently than internal combustion engines, and are capable of running on non-petroleum fuels such as methanol, ethanol, natural gas or hydrogen. Fuel cells can also have a major impact on improving air quality. They virtually eliminate particulates, NOx and sulfur oxide emissions, and significantly reduce hydrocarbons and carbon monoxide. The US Department of Energy program on fuel cells for transportation applications is structured to advance fuel cell technologies from the R&D phase, through engineering design and scale-up, to demonstration in cars, trucks, buses and locomotives, in order to provide energy savings, fuel flexibility and air quality improvements. This paper describes the present status of the US program. RP PATIL, PG (reprint author), US DOE,DIV ELECT & HYBRID PROP,FUEL CELL SYST RES & DEV,WASHINGTON,DC, USA. NR 7 TC 34 Z9 34 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JAN PY 1992 VL 37 IS 1-2 BP 171 EP 179 DI 10.1016/0378-7753(92)80075-M PG 9 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA GX406 UT WOS:A1992GX40600018 ER PT J AU CROWDER, SV HAMILTON, MD AF CROWDER, SV HAMILTON, MD TI AN EWMA FOR MONITORING A PROCESS STANDARD-DEVIATION SO JOURNAL OF QUALITY TECHNOLOGY LA English DT Article DE INTEGRAL EQUATION; LOCATION PARAMETER; LOG-GAMMA-DISTRIBUTION; SCALE PARAMETER ID WEIGHTED MOVING AVERAGES; CHARTS; SCHEMES AB Most applications of the exponentially weighted moving average (EWMA) for process monitoring have concentrated on the problem of detecting shifts in the mean level of a process. Perhaps more important is the problem of detecting increases in process variability, which can also have a major impact on product quality. In this paper we propose using an EWMA based on the log transformation of the sample variance. Properties of this EWMA are given and an optimal design strategy is presented. It is shown that the EWMA is superior to the usual range chart or s2 chart in terms of its ability to quickly detect small increases in the standard deviation of a normal process. C1 PRICE WATERHOUSE & CO,DIV MFG MANAGEMENT,COSTA MESA,CA 92628. RP CROWDER, SV (reprint author), SANDIA NATL LABS,DIV STAT COMP & HUMAN FACTORS,ALBUQUERQUE,NM 87185, USA. NR 18 TC 137 Z9 140 U1 1 U2 7 PU AMER SOC QUALITY CONTROL-ASQC PI MILWAUKEE PA ASQC MEMBERSHIP MANAGER 611 E. WISCONSIN AVENUE, MILWAUKEE, WI 53202 SN 0022-4065 J9 J QUAL TECHNOL JI J. Qual. Technol. PD JAN PY 1992 VL 24 IS 1 BP 12 EP 21 PG 10 WC Engineering, Industrial; Operations Research & Management Science; Statistics & Probability SC Engineering; Operations Research & Management Science; Mathematics GA GX473 UT WOS:A1992GX47300002 ER PT J AU HAMILTON, MD CROWDER, SV AF HAMILTON, MD CROWDER, SV TI AVERAGE RUN LENGTHS OF EWMA CONTROL CHARTS FOR MONITORING A PROCESS STANDARD-DEVIATION SO JOURNAL OF QUALITY TECHNOLOGY LA English DT Article AB A program is presented that generates a table of ARL's for a one-sided EWMA control chart on a process standard deviation. The combination of smoothing parameter lambda and constant upper control limit multiplier K that produces the minimum ARL for a specified increase in the standard deviation can be determined from that table. C1 SANDIA NATL LABS,DIV STAT COMP & HUMAN FACTORS,ALBUQUERQUE,NM 87185. RP HAMILTON, MD (reprint author), PRICE WATERHOUSE & CO,DIV MFG MANAGEMENT,COSTA MESA,CA 92628, USA. NR 6 TC 17 Z9 17 U1 0 U2 1 PU AMER SOC QUALITY CONTROL-ASQC PI MILWAUKEE PA ASQC MEMBERSHIP MANAGER 611 E. WISCONSIN AVENUE, MILWAUKEE, WI 53202 SN 0022-4065 J9 J QUAL TECHNOL JI J. Qual. Technol. PD JAN PY 1992 VL 24 IS 1 BP 44 EP 50 PG 7 WC Engineering, Industrial; Operations Research & Management Science; Statistics & Probability SC Engineering; Operations Research & Management Science; Mathematics GA GX473 UT WOS:A1992GX47300006 ER PT J AU MOORE, LL WILLIAMS, RL AF MOORE, LL WILLIAMS, RL TI A RAPID METHOD FOR DETERMINING NANOGRAM QUANTITIES OF URANIUM IN URINE USING THE KINETIC PHOSPHORESCENCE ANALYZER SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF ON LOW-LEVEL MEASUREMENTS OF ACTINIDES AND LONG-LIVED RADIONUCLIDES IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES CY JAN 29-FEB 02, 1990 CL BOMBAY, INDIA SP COUNCIL SCI & IND RES INDIA, NATL SCI FDN, US DOE, MAHARASHTRA GOVT, DEPT ATOM ENERGY INDIA, NUCL POWER COMMISS INDIA, DEPT SCI & TECHNOL INDIA, UNIV GRANTS COMMISS INDIA AB A procedure for determining total uranium in urine using a pulsed-laser Kinetic Phosphorescence Analyzer (KPA) is described. The chemical procedure is simple and rapid, and the operation of the KPA is straightforward. An inter-laboratory comparison (measuring total uranium by using fused pellet fluorometry, alpha spectrometry, and the KPA) demonstrates accuracy. The detection limit for this method, of 0.06 ng/mL, is readily achieved. The relative standard deviation (RSD) of the measurements at the 1.0 ng/mL level is 5%. Interference studies, which include selected elements found in urine, are discussed. Potential interferences in other matrices such as soil, milk, and water are also examined. RP MOORE, LL (reprint author), US DOE,RADIOL & ENVIRONM SCI LAB,785 DOE PL,IDAHO FALLS,ID 83402, USA. NR 1 TC 12 Z9 12 U1 0 U2 4 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JAN PY 1992 VL 156 IS 1 BP 223 EP 233 DI 10.1007/BF02037436 PG 11 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HD455 UT WOS:A1992HD45500020 ER PT J AU LAUL, JC AF LAUL, JC TI NATURAL RADIONUCLIDES IN GROUNDWATERS SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF ON LOW-LEVEL MEASUREMENTS OF ACTINIDES AND LONG-LIVED RADIONUCLIDES IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES CY JAN 29-FEB 02, 1990 CL BOMBAY, INDIA SP NATL SCI FDN, COUNCIL SCI & IND RES INDIA, BOMBAY UNIV, US DOE, MAHARASHTRA GOVT, DEPT ATOM ENERGY INDIA, NUCL POWER COMMISS INDIA, INDIAN ASSOC NUCL CHEMISTS & ALLIED SCI, DEPT SCI & TECHNOL INDIA, UNIV GRANTS COMMISS INDIA ID THORIUM SERIES; URANIUM; DISEQUILIBRIUM; ROCKS AB The U-234 and Th-230 radionuclides are highly retarded by factors of 10(4) to 10(5) in basalt groundwater (Hanford) and briny groundwaters from Texas, and geothermal brine from the Salton Sea Geothermal Field (SSGF). In basalt groundwaters (low ionic strength), Ra is highly sorbed, while in brines (high ionic strength), Ra is soluble. This is probably because the sorption sites are saturated with Na+ and Cl- ions, and RaCl2 is soluble in brines. Pb-210 is soluble in SSGF brine, probably as a chloride complex. The U-234/Th-230 ratios in basalt groundwaters and brines from Texas and SSGF are nearly unity, indicating that U is in the +4 state, suggesting a reducing environment for these aquifers. RP LAUL, JC (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 19 TC 23 Z9 24 U1 0 U2 2 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JAN PY 1992 VL 156 IS 2 BP 235 EP 242 DI 10.1007/BF02038341 PG 8 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HD796 UT WOS:A1992HD79600001 ER PT J AU ADAMS, WH AF ADAMS, WH TI LATE MEDICAL CONSEQUENCES OF EXPOSURE TO RADIOACTIVE FALLOUT - RONGELAP AND UTIRIK 35 YEARS AFTER BRAVO SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF ON LOW-LEVEL MEASUREMENTS OF ACTINIDES AND LONG-LIVED RADIONUCLIDES IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES CY JAN 29-FEB 02, 1990 CL BOMBAY, INDIA SP NATL SCI FDN, COUNCIL SCI & IND RES INDIA, BOMBAY UNIV, US DOE, MAHARASHTRA GOVT, DEPT ATOM ENERGY INDIA, NUCL POWER COMMISS INDIA, INDIAN ASSOC NUCL CHEMISTS & ALLIED SCI, DEPT SCI & TECHNOL INDIA, UNIV GRANTS COMMISS INDIA ID TOXOPLASMA ANTIBODIES; MARSHALL-ISLANDS; BOMB SURVIVORS; RETINOCHOROIDITIS; ASSOCIATION; MORTALITY; RADIATION; CANCER AB Data collected by the Brookhaven Medical Program on the late medical consequences of the exposure to radioactive fallout originated from the detonation of a thermonuclear device on Bikini atoll in Marshall Islands are discussed. RP ADAMS, WH (reprint author), ASSOC UNIV INC,BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. NR 23 TC 2 Z9 2 U1 0 U2 1 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JAN PY 1992 VL 156 IS 2 BP 269 EP 290 DI 10.1007/BF02038344 PG 22 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HD796 UT WOS:A1992HD79600004 ER PT J AU LATROUS, H OLIVER, J AF LATROUS, H OLIVER, J TI SELF-DIFFUSION COEFFICIENTS AND STRUCTURE OF THE TRIVALENT TRANSPLUTONIUM ION CURIUM AND GADOLINIUM IN AQUEOUS-SOLUTION SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF ON LOW-LEVEL MEASUREMENTS OF ACTINIDES AND LONG-LIVED RADIONUCLIDES IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES CY JAN 29-FEB 02, 1990 CL BOMBAY, INDIA SP NATL SCI FDN, COUNCIL SCI & IND RES INDIA, BOMBAY UNIV, US DOE, MAHARASHTRA GOVT, DEPT ATOM ENERGY INDIA, NUCL POWER COMMISS INDIA, INDIAN ASSOC NUCL CHEMISTS & ALLIED SCI, DEPT SCI & TECHNOL INDIA, UNIV GRANTS COMMISS INDIA ID ELECTROLYTE-SOLUTIONS; HYDRATED RADII; ACTINIDE IONS AB Self-diffusion coefficients D of the trivalent aquo ion Cm3+ have been determined in aqeous Nd(ClO4)3-HClO4 solutions (pH 2.5) at 25-degrees-C, by the open-end capillary method (O. E. C. M.). The variation of D versus the square root of the concentration of inactive solution is an exponential form in the studied range of concentration. The limiting value D0 at zero ionic strength is 6.0.10(-6) cm2.s-1. The curve D = f(square-root c) relating to Cm3+ can be compared to those of Am-241(3+) and Gd-153(3+) obtained under similar conditions. We find a similar ionic structure of Cm3+ with Am3+ and Gd3+. They have the same hydration as a tripositive of 5f and 4f ions in the absence of hydrolysis, complexing, or pairing at pH 2.5. The present study contributes to show the analogy of the solvation structure of trivalent actinide ions in aqueous solution at pH 2.5 with that of the trivalent lanthanide ions as a help for predicting the thermodynamic properties. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP LATROUS, H (reprint author), FAC SCI TUNIS,CHIM ANALYT & DIFFUS LAB,TUNIS,TUNISIA. NR 24 TC 9 Z9 9 U1 0 U2 2 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JAN PY 1992 VL 156 IS 2 BP 291 EP 296 DI 10.1007/BF02038345 PG 6 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HD796 UT WOS:A1992HD79600005 ER PT J AU INN, KGW COURSEY, BM EISENHOWER, EH WALKER, MD HEATON, HT DUVALL, KC AF INN, KGW COURSEY, BM EISENHOWER, EH WALKER, MD HEATON, HT DUVALL, KC TI NATIONAL IONIZING-RADIATION SECONDARY LABORATORY SYSTEM SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF ON LOW-LEVEL MEASUREMENTS OF ACTINIDES AND LONG-LIVED RADIONUCLIDES IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES CY JAN 29-FEB 02, 1990 CL BOMBAY, INDIA SP NATL SCI FDN, COUNCIL SCI & IND RES INDIA, BOMBAY UNIV, US DOE, MAHARASHTRA GOVT, DEPT ATOM ENERGY INDIA, NUCL POWER COMMISS INDIA, INDIAN ASSOC NUCL CHEMISTS & ALLIED SCI, DEPT SCI & TECHNOL INDIA, UNIV GRANTS COMMISS INDIA AB Over the past ten years, the National Institute of Standards and Technology has, through its Office of Radiation Measurement, developed a national program for Secondary Laboratories. These Secondary Laboratories provide the necessary calibrations and quality assurance testing to support and affirm the caliber of the measurements in the areas they serve. The areas that are in the program include State Radiation Protection, Personnel Dosimetry, Survey Instrument Calibration, High-Level Dosimetry, Radiation Therapy, Bioassay, Survey Instrument Testing, Ionizing Radiation, Environmental Radioactivity, Radioactivity Standards, and Radon. C1 US FDA,CTR DEVICES & RADIOL HLTH,ROCKVILLE,MD 20857. US DOE,OFF ENVIRONM GUIDANCE,WASHINGTON,DC 20585. RP INN, KGW (reprint author), NBS,CTR RADIAT RES,GAITHERSBURG,MD 20899, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JAN PY 1992 VL 156 IS 2 BP 313 EP 322 DI 10.1007/BF02038347 PG 10 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HD796 UT WOS:A1992HD79600007 ER PT J AU KATHREN, RL MCINROY, JF AF KATHREN, RL MCINROY, JF TI IMPLICATIONS OF POSTMORTEM HUMAN TISSUE-ANALYSIS ON BIOKINETIC MODELS FOR ACTINIDES SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF ON LOW-LEVEL MEASUREMENTS OF ACTINIDES AND LONG-LIVED RADIONUCLIDES IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES CY JAN 29-FEB 02, 1990 CL BOMBAY, INDIA SP NATL SCI FDN, COUNCIL SCI & IND RES INDIA, BOMBAY UNIV, US DOE, MAHARASHTRA GOVT, DEPT ATOM ENERGY INDIA, NUCL POWER COMMISS INDIA, INDIAN ASSOC NUCL CHEMISTS & ALLIED SCI, DEPT SCI & TECHNOL INDIA, UNIV GRANTS COMMISS INDIA ID STATES TRANS-URANIUM; URINARY-EXCRETION; REGISTRY REPORT; AM-241 CONTENT; SPECIAL ISSUE; WHOLE-BODY; PLUTONIUM; AMERICIUM AB Changes and refinements to original biokinetic models, based on postmortem radiochemical measurements of the concentration and distribution of actinides in tissues obtained from volunteer donors with known occupational experience with actinides, are discussed with emphasis on applications to operational health physics. Analysis of five whole body donations to the United States Transuranium Registry indicates that the Pu-239 model put forth in ICRP Publication 30 is generally applicable, although there is a significant fraction missing from the model that is retained in the muscle. For Am-241, the more recent model put forth in ICRP Publication 48 fits the autopsy data better than the model in Publication 30, although the observed retention half-time in the liver is on the order of two to three years rather than 20 years proposed by the model. An estimated 20% of the initial systemic deposition for Am-241 goes to the muscle, where it has a residence half-time estimated at ten years. For both Pu and Am, less than 5% of the skeletal actinide in the skeleton is found in the marrow. The highest concentrations appear to be associated with the periosteum and endosteum. A significantly greater fraction of inhaled Pu and Am is retained in the lungs than is predicted by current models. Differences in the actinide distribution between lung and the associated lymph nodes are observed in smokers as compared with non-smokers. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP KATHREN, RL (reprint author), HANFORD ENVIRONM HLTH FDN,RICHLAND,WA 99352, USA. RI WSU, USTUR/I-1056-2013 NR 30 TC 6 Z9 6 U1 0 U2 3 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JAN PY 1992 VL 156 IS 2 BP 413 EP 424 DI 10.1007/BF02038355 PG 12 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HD796 UT WOS:A1992HD79600015 ER PT J AU ELLIOTT, LF WILDUNG, RE AF ELLIOTT, LF WILDUNG, RE TI WHAT BIOTECHNOLOGY MEANS FOR SOIL AND WATER CONSERVATION SO JOURNAL OF SOIL AND WATER CONSERVATION LA English DT Article ID NITROGEN; TILLAGE C1 PACIFIC NW LAB, ENVIRONM SCI RES CTR, RICHLAND, WA 99352 USA. RP ELLIOTT, LF (reprint author), USDA, ARS, NATL FORAGE SEED PROD RES CTR, CORVALLIS, OR 97331 USA. NR 25 TC 0 Z9 0 U1 0 U2 0 PU SOIL WATER CONSERVATION SOC PI ANKENY PA 7515 N E ANKENY RD, ANKENY, IA 50021-9764 SN 0022-4561 J9 J SOIL WATER CONSERV JI J. Soil Water Conserv. PD JAN-FEB PY 1992 VL 47 IS 1 BP 17 EP 20 PG 4 WC Ecology; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA HC902 UT WOS:A1992HC90200007 ER PT J AU CASTEEL, WJ LUCIER, G HAGIWARA, R BORRMANN, H BARTLETT, N AF CASTEEL, WJ LUCIER, G HAGIWARA, R BORRMANN, H BARTLETT, N TI STRUCTURAL AND MAGNETIC-PROPERTIES OF SOME AGF+ SALTS SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article ID FLUORIDE C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP CASTEEL, WJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. NR 13 TC 25 Z9 25 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-4596 J9 J SOLID STATE CHEM JI J. Solid State Chem. PD JAN PY 1992 VL 96 IS 1 BP 84 EP 96 DI 10.1016/S0022-4596(05)80300-7 PG 13 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA GY543 UT WOS:A1992GY54300012 ER PT J AU VELETSOS, AS TANG, Y TANG, HT AF VELETSOS, AS TANG, Y TANG, HT TI DYNAMIC-RESPONSE OF FLEXIBLY SUPPORTED LIQUID-STORAGE TANKS SO JOURNAL OF STRUCTURAL ENGINEERING-ASCE LA English DT Article AB A refined method is presented for evaluating the impulsive components of response of upright, cylindrical liquid-storage tanks that are supported through a rigid circular foundation at the surface of a homogeneous, elastic half-space and are excited horizontally at the base. The convective components of response are insensitive to the flexibilities of the tank wall and supporting soils, and may be computed considering both the tank and the supporting medium to be rigid. Critical responses are evaluated for harmonic and seismic excitations over wide ranges of tank proportions and soil stiffnesses, and the results are used to elucidate the effects of soil-structure interaction and to assess the adequacy of a previously reported simpler method. In addition to the exact method, an approximate technique is proposed with which the contributions of the higher modes may be evaluated readily. It is shown that soil-structure interaction may reduce significantly the critical responses of broad tanks, but may increase those of all, stiff tanks that have high fundamental natural frequencies. It is further shown that for tanks with height-to-radius ratios of the order of 1.5 or less, the higher modes of vibration are insignificant contributors to the overall response. Such systems may be analyzed reliably by the previously proposed simpler method. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. ELECT POWER RES INST,DIV NUCL POWER,PALO ALTO,CA 94303. RP VELETSOS, AS (reprint author), RICE UNIV,DEPT CIVIL ENGN,HOUSTON,TX 77251, USA. NR 12 TC 17 Z9 18 U1 0 U2 0 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9445 J9 J STRUCT ENG-ASCE JI J. Struct. Eng.-ASCE PD JAN PY 1992 VL 118 IS 1 BP 264 EP 283 DI 10.1061/(ASCE)0733-9445(1992)118:1(264) PG 20 WC Construction & Building Technology; Engineering, Civil SC Construction & Building Technology; Engineering GA GW378 UT WOS:A1992GW37800015 ER PT J AU HARMON, JE AF HARMON, JE TI AN ANALYSIS OF 50 CITATION SUPERSTARS FROM THE SCIENTIFIC LITERATURE SO JOURNAL OF TECHNICAL WRITING AND COMMUNICATION LA English DT Article ID POLYACRYLAMIDE GELS; PROTEINS; DNA; ELECTROPHORESIS; ACID AB This article contains results from a literary analysis of fifty scientific papers selected from the top 100 most-cited papers appearing in the Science Citation Index for the period 1945-1988. Most papers are from the field of biochemistry and became citation superstars because their authors discovered a method or material that numerous others could use in their own research. The typical paper has two authors, two tables, six figures, and twenty-two references. It adheres to the conventional topical organization, with the topics distributed as follows: 2 percent abstract, 5 percent introduction, 25 percent methods and materials, 50 percent results, 10 percent discussion, 4 percent conclusion, and 4 percent reference list. Tables and figures occupy about 30 percent of the article. With respect to the writing style, the average sentence is somewhat long (24 words) but not unreasonably so, and the sentence structure is simple greater than half the time. Moreover, sentences tend to rely heavily on to be verbs (about 80% of sentences have at least one) and abstract nouns (0.66 per sentence). Explanations for the typical form and writing style in these papers are provided. RP HARMON, JE (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 79 TC 7 Z9 7 U1 0 U2 3 PU BAYWOOD PUBL CO INC PI AMITYVILLE PA 26 AUSTIN AVE, AMITYVILLE, NY 11701 SN 0047-2816 J9 J TECH WRIT COMMUN JI J. Teach. Writ. Commun. PY 1992 VL 22 IS 1 BP 17 EP 37 PG 21 WC Communication SC Communication GA HX216 UT WOS:A1992HX21600003 ER PT J AU HARMON, JE AF HARMON, JE TI CURRENT-CONTENTS OF THEORETICAL SCIENTIFIC PAPERS SO JOURNAL OF TECHNICAL WRITING AND COMMUNICATION LA English DT Article AB This article discusses the typical form and content of forty theoretical scientific papers. These papers were chosen from the 400 most-cited papers in the Science Citation Index for the period 1945-1988 (reported by Eugene Garfield in a series of recent essays appearing in Current Contents). It was found that the typical form for these papers is similar to that for experimental and methods papers, but the content differs substantially. In brief, the content follows the logical sequence: problem or need, assumptions made in attempting to solve problem or meet need, theorem derived from those assumptions and additional considerations, proof of theorem by logical reasoning or validation by comparison with what is established or establishable, conclusions from previous discussion, and recommendations on future experimental or theoretical work. Also, compared with experimental and methods papers, these theoretical papers have somewhat fewer figures and tables, but many more references and equations. RP HARMON, JE (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 60 TC 1 Z9 1 U1 1 U2 1 PU BAYWOOD PUBL CO INC PI AMITYVILLE PA 26 AUSTIN AVE, AMITYVILLE, NY 11701 SN 0047-2816 J9 J TECH WRIT COMMUN JI J. Teach. Writ. Commun. PY 1992 VL 22 IS 4 BP 357 EP 375 PG 19 WC Communication SC Communication GA LR306 UT WOS:A1992LR30600002 ER PT J AU VOLKMAN, DE AF VOLKMAN, DE TI INTRODUCTION TO SYMPOSIUM ON RADIATION SHIELDING FOR THE 21ST-CENTURY SO JOURNAL OF TESTING AND EVALUATION LA English DT Editorial Material C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0090-3973 J9 J TEST EVAL JI J. Test. Eval. PD JAN PY 1992 VL 20 IS 1 BP 66 EP 66 PG 1 WC Materials Science, Characterization & Testing SC Materials Science GA JY510 UT WOS:A1992JY51000009 ER PT J AU OSWALD, AJ AF OSWALD, AJ TI SHIELD VERIFICATION TESTING AT THE IDAHO-CHEMICAL-PROCESSING-PLANT FUEL PROCESSING FACILITY SO JOURNAL OF TESTING AND EVALUATION LA English DT Article; Proceedings Paper CT SYMP ON RADIATION SHIELDING FOR THE 21ST CENTURY CY JUN 24, 1991 CL ATLANTIC CITY, NJ SP AMER SOC TESTING & MAT, COMM CONCRETE & CONCRETE AGGREGATES DE CONCRETE TESTING; SHIELD WALLS; NUCLEAR; RADIATION ATTENUATION; DESIGN CRITERIA AB A Shield Testing Program is being conducted at a new nuclear facility to verify that shield walls, doors, and windows meet the design criteria for radiation attenuation. A modified Teletherapy Unit is being utilized as a test unit. This unit has been successfully used for shield testing during the construction of two other major facilities. A collimated beam from a Co-60 source is exposed on one side of the shield being tested, and the attenuated radiation is measured with a standard radiation detector. Detailed documentation is completed for each area tested. Detailed procedures are required for operation of the test unit. No significant personnel exposure has been recorded during any of the shield testing. The Co-60 test method is a known, proven technique that provides the required penetration and the capability to cover relatively large areas with a single exposure. C1 WESTINGHOUSE IDAHO NUCL CO,IDAHO FALLS,ID 83403. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0090-3973 J9 J TEST EVAL JI J. Test. Eval. PD JAN PY 1992 VL 20 IS 1 BP 87 EP 91 PG 5 WC Materials Science, Characterization & Testing SC Materials Science GA JY510 UT WOS:A1992JY51000013 ER PT J AU VOLKMAN, DE BUSSOLINI, PL AF VOLKMAN, DE BUSSOLINI, PL TI COMPARISON OF FINE PARTICLE COLEMANITE AND BORON FRIT IN CONCRETE FOR TIME-STRENGTH RELATIONSHIP SO JOURNAL OF TESTING AND EVALUATION LA English DT Article; Proceedings Paper CT SYMP ON RADIATION SHIELDING FOR THE 21ST CENTURY CY JUN 24, 1991 CL ATLANTIC CITY, NJ SP AMER SOC TESTING & MAT, COMM CONCRETE & CONCRETE AGGREGATES DE COLEMANITE; BORON FRIT; CONCRETE AB The element boron, when added to concrete, has proved effective in shielding neutron particles by absorbing the neutron and emitting a low-energy gamma ray. The various boron additives used with concrete can severely retard the set time and strength gain. An advantage to using small particle size boron is that the smaller grain size provides better boron disbursement within the concrete matrix to absorb neutrons. However, boron additives of powder consistency are usually not used due to the greater potential of forming chemical solutions that act as a retarder in the concrete. Research has shown that the amount of boron additives in concrete can be reduced significantly if fine grain particles can be successfully incorporated into the concrete matrix. The purpose of this study is to compare strength gain characteristics of concrete mixes containing various quantities of fine grain boron additive. The boron additive colemanite, a natural mineral, is compared with two brands of manufactured aggregate, boron frit. Concrete test cylinders are molded for testing the compressive strength of the mix after 4, 7, 28, and 56 days. Tested are five different quantities of colemanite as well as five comparable amounts of boron frit for each brand of the material. The test values are compared with a control concrete specimen containing no boron additive. Results of this study can be used to optimize the cost and effectiveness of boron additives in radiation shielding concrete. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 5 TC 1 Z9 1 U1 1 U2 1 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0090-3973 J9 J TEST EVAL JI J. Test. Eval. PD JAN PY 1992 VL 20 IS 1 BP 92 EP 96 PG 5 WC Materials Science, Characterization & Testing SC Materials Science GA JY510 UT WOS:A1992JY51000014 ER PT J AU BHATTACHARYA, AK PETROVIC, JJ AF BHATTACHARYA, AK PETROVIC, JJ TI R-CURVE BEHAVIOR IN ZIRCONIA-REINFORCED MOLYBDENUM DISILICIDE COMPOSITES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article DE R-CURVE; MOLYBDENUM; SILICIDES; ZIRCONIA; FRACTURE TOUGHNESS ID FRACTURE-TOUGHNESS; CRACK-GROWTH; CERAMICS; STRENGTH AB R-curves for hot-pressed 20 vol% ZrO2 (2.5-YPSZ and 8-YPSZ) reinforced MoSi2 composites were evaluated using the indentation/bend technique. Results indicated a modest increase in the material toughness for both composites. Experimental R-curves were compared with theoretically predicted R-curves to evaluate the critical transformation stress for the partially stabilized ZrO2 composite. A high critical transformation stress value obtained was indicative of the inhibition of transformation toughening effects due to microstructural inhomogeneity in the partially stabilized ZrO2-MoSi2 composites. RP BHATTACHARYA, AK (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 26 TC 33 Z9 33 U1 1 U2 2 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JAN PY 1992 VL 75 IS 1 BP 23 EP 27 DI 10.1111/j.1151-2916.1992.tb05436.x PG 5 WC Materials Science, Ceramics SC Materials Science GA HF198 UT WOS:A1992HF19800005 ER PT J AU PIEPEL, GF SHADE, JW AF PIEPEL, GF SHADE, JW TI INSITU VITRIFICATION AND THE EFFECTS OF SOIL ADDITIVES - A MIXTURE EXPERIMENT CASE-STUDY SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article DE STATISTICS; WASTES; SOILS; VITRIFICATION; MODELS AB This paper presents a case study involving in situ vitrification (ISV), a process for immobilizing chemical or nuclear wastes in soil by melting-dissolving the contaminated soil into a glass block. One goal of the study was to investigate how viscosity and electrical conductivity were affected by mixing CaO and Na2O with soil. A three-component constrained-region mixture experiment design was generated and the viscosity and electrical conductivity data collected. Several second-order mixture models were considered, and the Box-Cox transformation technique was applied to select property transformations. The fitted models were used to produce contour and component effects plots. C1 PACIFIC NW LAB, DEPT WASTE TREATMENT TECHNOL, INSITU VITRIFICAT GRP, RICHLAND, WA 99352 USA. RP PIEPEL, GF (reprint author), PACIFIC NW LAB, DEPT ANALYT SCI, STAT DESIGN & ANAL GRP, RICHLAND, WA 99352 USA. NR 7 TC 3 Z9 4 U1 2 U2 3 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JAN PY 1992 VL 75 IS 1 BP 112 EP 116 DI 10.1111/j.1151-2916.1992.tb05451.x PG 5 WC Materials Science, Ceramics SC Materials Science GA HF198 UT WOS:A1992HF19800020 ER PT J AU RABIN, BH AF RABIN, BH TI JOINING OF SILICON-CARBIDE SILICON-CARBIDE COMPOSITES AND DENSE SILICON-CARBIDE USING COMBUSTION REACTIONS IN THE TITANIUM-CARBON-NICKEL SYSTEM SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article DE COMBUSTION SYNTHESIS; SILICON CARBIDE; JOINING; TITANIUM CARBIDE; NICKEL ID REINFORCED SIC COMPOSITES; HIGH-TEMPERATURES; CERAMICS; NICALON; FIBERS; ALLOY AB A new ceramic joining technique has been developed that utilizes an exothermic combustion reaction to simultaneously synthesize the joint interlayer material and to bond together the ceramic workpieces. The method has been used to join SiC/SiC composites and dense SiC ceramics using TiC-Ni powder mixtures that ignite below 1200-degrees-C to form a TiC-Ni joining material. Thin layers of the powder reactants were prepared by tape casting, and joining was accomplished by heating in a hot-press to ignite the combustion reaction. During this process, localized exothermic heating of the joint region resulted in chemical interaction at the interface between the TiC-Ni and the SiC ceramic that contributed to bonding. Room-temperature four-point bending strengths of joints produced by this method have exceeded 100 MPa. RP RABIN, BH (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 24 TC 27 Z9 27 U1 1 U2 8 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JAN PY 1992 VL 75 IS 1 BP 131 EP 135 DI 10.1111/j.1151-2916.1992.tb05454.x PG 5 WC Materials Science, Ceramics SC Materials Science GA HF198 UT WOS:A1992HF19800023 ER PT J AU DUNMEAD, SD MUNIR, ZA HOLT, JB AF DUNMEAD, SD MUNIR, ZA HOLT, JB TI TEMPERATURE PROFILE ANALYSIS IN COMBUSTION SYNTHESIS .1. THEORY AND BACKGROUND SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article DE COMBUSTION SYNTHESIS; TEMPERATURE; THEORY; MODELING; KINETICS ID TITANIUM NITRIDE AB An analysis of the use of temperature profiles in the determination of the kinetic parameters of self-sustaining combustion synthesis is provided. Two mathematical approaches are discussed. In the first approach, the analysis focuses on the initial portion of the temperature profile and thus emphasizes the kinetics of the initial stages (eta less-than-or-similar-to 1.0) of this process. The second approach emphasizes both the initial and final stages of the process (eta approximately 1.0). With the simultaneous measurements of the velocity of the combustion wave, temperature profile analysis provides values for the effective thermal diffusivity of the reactants. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP DUNMEAD, SD (reprint author), UNIV CALIF DAVIS,COLL ENGN,DIV MAT SCI & ENGN,DAVIS,CA 95616, USA. NR 18 TC 37 Z9 38 U1 0 U2 6 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JAN PY 1992 VL 75 IS 1 BP 175 EP 179 DI 10.1111/j.1151-2916.1992.tb05461.x PG 5 WC Materials Science, Ceramics SC Materials Science GA HF198 UT WOS:A1992HF19800030 ER PT J AU DUNMEAD, SD MUNIR, ZA HOLT, JB AF DUNMEAD, SD MUNIR, ZA HOLT, JB TI TEMPERATURE PROFILE ANALYSIS IN COMBUSTION SYNTHESIS .2. EXPERIMENTAL-OBSERVATIONS SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article DE COMBUSTION SYNTHESIS; TEMPERATURE; KINETICS; ZIRCONIUM; BORON AB The temperature profiles associated with the passing of a self-propagating wave in the combustion synthesis of zirconium boride were investigated. The use of these profiles in the determination of the kinetics of the associated synthesis reaction was investigated. From profile analysis an activation energy of 144.5 +/- 15 kJ.mol-1 was calculated and was found to agree very well with the corresponding value obtained from wave velocity measurements, 148.6 +/- 12 kJ.mol-1. From these analyses, the thermal diffusivity of the reactants was also calculated. The thermal diffusivity decreased slightly with increasing combustion temperature, with the values ranging from 2.10 x 10(-3) to 1.79 x 10(-3) over the range of 2609 to 2909 K, respectively. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP DUNMEAD, SD (reprint author), UNIV CALIF DAVIS,COLL ENGN,DEPT MAT SCI & ENGN,DAVIS,CA 95616, USA. NR 13 TC 41 Z9 42 U1 1 U2 6 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JAN PY 1992 VL 75 IS 1 BP 180 EP 188 DI 10.1111/j.1151-2916.1992.tb05462.x PG 9 WC Materials Science, Ceramics SC Materials Science GA HF198 UT WOS:A1992HF19800031 ER PT J AU MOORE, KA CESARANO, J SMITH, DM KODAS, TT AF MOORE, KA CESARANO, J SMITH, DM KODAS, TT TI SYNTHESIS OF SUBMICROMETER MULLITE POWDER VIA HIGH-TEMPERATURE AEROSOL DECOMPOSITION SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article DE MULLITE; POWDERS; SYNTHESIS; AEROSOL; HIGH TEMPERATURE ID DIPHASIC XEROGELS; SYSTEM AL2O3-SIO2 AB High-purity mullite powders (3Al2O3.2SiO2) have been prepared using a high-temperature aerosol decomposition technique yielding submicrometer (0.6-mu-m average) particles of spherical morphology with no hard agglomerates using aluminum nitrate and fumed silica as precursors. Depending upon the reaction conditions used, the powders range from amorphous to crystalline with no evidence of secondary-phase formation. This mullite synthesis approach has the advantages of not requiring postsynthesis milling, the ability to use a wide range of precursor systems, and enhanced control over chemical homogeneity and particle size/shape. C1 UNIV NEW MEXICO,NATL SCI FDN,CTR MICROENGINEERED CERAM,ALBUQUERQUE,NM 87131. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 8 TC 17 Z9 17 U1 0 U2 2 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JAN PY 1992 VL 75 IS 1 BP 213 EP 215 DI 10.1111/j.1151-2916.1992.tb05469.x PG 3 WC Materials Science, Ceramics SC Materials Science GA HF198 UT WOS:A1992HF19800038 ER PT J AU HAYNES, GR MARTIN, RL HAY, PJ AF HAYNES, GR MARTIN, RL HAY, PJ TI THEORETICAL INVESTIGATIONS OF CLASSICAL AND NONCLASSICAL STRUCTURES OF MH7L2 POLYHYDRIDE COMPLEXES OF RE AND TC SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID MOLECULAR-HYDROGEN COMPLEXES; TRANSITION-METALS; HEPTAHYDRIDE COMPLEXES; DIHYDROGEN; CRYSTAL; LIGAND; COORDINATION; EQUILIBRIUM; DIFFRACTION; POTENTIALS AB The geometries, energies, and electronic properties of ReH7L2 and TcH7L2 complexes have been calculated using ab initio theoretical techniques including relativistic effective core potentials for Re and Tc. Classical nine-coordinate MH7L2 polyhydride forms and nonclassical M(H2)H5L2 and M(H2)2H3L2 structures containing molecular dihydrogen ligands have been investigated. Molecular geometries were optimized at the Hartree-Fock SCF level with L = PH3 model ligands for the various structures of Re and Tc. Electron correlation effects were treated using configuration interaction (CI) techniques at the optimized geometries. Results are compared with experimental structural determination and with solution NMR studies of Re complexes. The classical structure is found to be more stable than the eight-coordinate structure by 2-4 kcal/mol for the case of Re, depending on the level of calculation, and 7-10 kcal/mol lower than seven-coordinate forms. The nonclassical seven-coordinate structures, by contrast, are predicted to be 2-12 kcal/mol lower in energy than the classical form for Tc depending on the basis set and treatment of electron correlation effects. Although the small differences in energy between these forms make predictions of the most stable form of MH7P2 species with bulkier phosphine ligands in solution more difficult, these results indicate a greater tendency for Tc to display nonclassical structures relative to Re. The positive ions of ReH7L2 and Re(H2)H5L2 are also investigated, with the IP of the latter form calculated to be 2.1 eV lower in energy than the classical structure. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 38 TC 35 Z9 35 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JAN 1 PY 1992 VL 114 IS 1 BP 28 EP 36 DI 10.1021/ja00027a003 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA GY631 UT WOS:A1992GY63100003 ER PT J AU WANG, P HILL, TG WARTCHOW, CA HUSTON, ME OEHLER, LM SMITH, MB BEDNARSKI, MD CALLSTROM, MR AF WANG, P HILL, TG WARTCHOW, CA HUSTON, ME OEHLER, LM SMITH, MB BEDNARSKI, MD CALLSTROM, MR TI NEW CARBOHYDRATE-BASED MATERIALS FOR THE STABILIZATION OF PROTEINS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID THERMOLYSIN-CATALYZED SYNTHESIS; D-AMINO ACIDS; PEPTIDE-SYNTHESIS; ORGANIC-SOLVENTS; ALPHA-CHYMOTRYPSIN; RESTRICTION ENDONUCLEASES; ENZYMATIC-SYNTHESIS; METHYL-ESTER; IMMOBILIZED THERMOLYSIN; POLYVINYL SACCHARIDE)S C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. OHIO STATE UNIV,DEPT CHEM,COLUMBUS,OH 43210. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. NR 84 TC 76 Z9 76 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JAN 1 PY 1992 VL 114 IS 1 BP 378 EP 380 DI 10.1021/ja00027a068 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA GY631 UT WOS:A1992GY63100068 ER PT J AU MCLUCKEY, SA VANBERKEL, GJ GLISH, GL AF MCLUCKEY, SA VANBERKEL, GJ GLISH, GL TI TANDEM MASS-SPECTROMETRY OF SMALL, MULTIPLY CHARGED OLIGONUCLEOTIDES SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID FAST-ATOM-BOMBARDMENT; ELECTROSPRAY IONIZATION; IONS; BIOMOLECULES; NUCLEOSIDES; SPECTRA AB Multiply charged anions derived from electrospray ionization of the sodium salts of various small oligonucleotides (n = 4-8) have been subjected to tandem mass spectrometry (MS/MS) in a quadrupole ion trap. All ions were observed to dissociate with high efficiencies even under conditions not ordinarily conducive for the observance of high MS/MS efficiency. Large fractions of the total product ion signal could be attributed to single-cleavage reactions with the parent ion charge shared among the two product ions in various combinations. In every case, the most facile reaction was observed to be the loss of the adenine anion. This reaction was then observed to be followed by cleavage of the 3' C-O bond of phosphodiester linkage of the sugar from which the which the adenine had been lost. RP MCLUCKEY, SA (reprint author), OAK RIDGE NATL LAB,DIV ANALYT CHEM,POB 2008,OAK RIDGE,TN 37831, USA. RI McLuckey, Scott/B-2203-2009 OI McLuckey, Scott/0000-0002-1648-5570 NR 43 TC 407 Z9 412 U1 6 U2 34 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD JAN PY 1992 VL 3 IS 1 BP 60 EP 70 DI 10.1016/1044-0305(92)85019-G PG 11 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA GZ121 UT WOS:A1992GZ12100008 PM 24242838 ER PT J AU SMITHWICK, RW AF SMITHWICK, RW TI THEORETICAL CALCULATIONS OF RELATIVE ION YIELDS FOR GLOW-DISCHARGE MASS-SPECTROMETRY SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID PLASMA AB Quantitative determination of the elemental composition of metals and other solids by glow discharge mass spectrometry requires a calibration factor for each element. In past work, these factors, called relative ion yields (RIYs), have been determined experimentally from the mass spectra of standards of certified composition. The RIYs of some elements were found to be over 10 times larger than the RIYs of other elements. In this study a simple calculation of the RIYs of the elements within the same sample is derived from a theoretical framework which takes into account the combined effects of sputtering and ionization. The ionization function involves the electron affinity and the first ionization potential of each element, plus two unknown parameters. By favorable selection of a temperature parameter and a chemical-potential parameter, the RIYs calculated by this method were found to agree satisfactorily with the experimental RIYs of former work. The temperature of 16,000 K (used in this work) corresponds to an average electron energy of approximately 2 eV. C1 MARTIN MARIETTA ENERGY SYST INC,PLANT LAB,OAK RIDGE Y-12 PLANT,OAK RIDGE,TN. NR 17 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD JAN PY 1992 VL 3 IS 1 BP 79 EP 84 DI 10.1016/1044-0305(92)85021-B PG 6 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA GZ121 UT WOS:A1992GZ12100010 PM 24242840 ER PT J AU BHATTACHARYA, RN PARILLA, PA NOUFI, R ARENDT, P ELLIOTT, N AF BHATTACHARYA, RN PARILLA, PA NOUFI, R ARENDT, P ELLIOTT, N TI YBACUO AND TLBACACUO SUPERCONDUCTOR THIN-FILMS VIA AN ELECTRODEPOSITION PROCESS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article AB Thin-film superconductors of YBaCuO (YBCO) and TlBaCaCuO (TBCCO) were fabricated via an electrodeposition process. The YBCO superconductor precursor thin films were deposited at potentials ranging from -2.5 to -4 V vs. an Ag/AgNO3 reference electrode. The YBCO films were deposited under both constant and pulsed-potential conditions. The post-annealed YBCO films showed zero resistance of approximately 74 K on Ni, 78 K on MgO, and 91 K on ZrO2 substrates. The best critical current densities obtained for the YBCO films at 4 K and zero magnetic field and their respective substrates are as follows: 4000 A/cm2 on [100] ZrO2, 3960 A/CM2 on [100] MgO (constant potential), 5160 A/cm2 on [100] MgO (pulsed potential), 500 A/cm2 on a Ni strip, 325 A/cm2 on a Ni wire, and 500 A/cm2 on a Ag wire. The precursors of the super-conducting conducting TBCCO films were codeposited at a constant potential of -4 V and also under pulsed-potential conditions. The post-annealed TBCCO films showed zero resistance at about 102 K on SrTiO3 substrate. The critical current density at 76 K of a TBCCO film deposited at constant potential on a silver-coated SrTiO3 substrate was 20,000 A/cm2 in zero magnetic field and 5,000 A/cm2 in a 10 kOe field parallel to the film plane. The critical current density of pulsed-potential deposited TBCCO film on SrTiO3 was 56,000 A/cm2 at 76 K in zero field. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP BHATTACHARYA, RN (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 8 TC 42 Z9 43 U1 0 U2 5 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD JAN PY 1992 VL 139 IS 1 BP 67 EP 69 DI 10.1149/1.2069202 PG 3 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA GY556 UT WOS:A1992GY55600021 ER PT J AU GOTTESFELD, S URIBE, FA ARMES, SP AF GOTTESFELD, S URIBE, FA ARMES, SP TI THE APPLICATION OF A POLYPYRROLE PRECOAT FOR THE METALLIZATION OF PRINTED-CIRCUIT BOARDS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Letter AB We describe a printed circuit board metallization process starting with the formation of a precoat of polypyrrole (PPY) on the board, followed by the direct electrodeposition of copper onto the polypyrrole-coated substrate. The polypyrrole film is applied to the insulating substrate by a single chemical polymerization step from an aqueous solution. The sheet resistance of the polypyrrole precoat is typically of the order of a few hundred OMEGA/square which is a sufficiently low resistance to enable direct metal electrodeposition onto the PPY-coated substrate. C1 UNIV SUSSEX,SCH CHEM & MOLEC SCI,BRIGHTON BN1 9QG,E SUSSEX,ENGLAND. RP GOTTESFELD, S (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,ELECTR RES GRP,LOS ALAMOS,NM 87545, USA. NR 8 TC 23 Z9 23 U1 0 U2 6 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD JAN PY 1992 VL 139 IS 1 BP L14 EP L15 DI 10.1149/1.2069210 PG 2 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA GY556 UT WOS:A1992GY55600008 ER PT J AU CHRISTENSEN, R SCHANTZ, H SHAPIRO, J AF CHRISTENSEN, R SCHANTZ, H SHAPIRO, J TI ON THE RANGE OF VALIDITY OF THE MORI-TANAKA METHOD SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS LA English DT Article ID COMPOSITE; MODELS AB THE RANGE of validity is displayed for results predicted by the Mori-Tanaka micro-mechanics model. The general model type is that of spherical inclusions in a continuous matrix phase, for a polydisperse (size) suspension. The elastic shear modulus is the quantity of evaluation, using the generalized self-consistent method to give a rigorous result. C1 UNIV TEXAS,AUSTIN,TX 78712. COLUMBIA UNIV,NEW YORK,NY 10027. RP CHRISTENSEN, R (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT APPL SCI,LIVERMORE,CA 94550, USA. NR 5 TC 14 Z9 14 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-5096 J9 J MECH PHYS SOLIDS JI J. Mech. Phys. Solids PD JAN PY 1992 VL 40 IS 1 BP 69 EP 73 DI 10.1016/0022-5096(92)90240-3 PG 5 WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA GX800 UT WOS:A1992GX80000004 ER PT J AU CHEN, Y SHENG, IC AF CHEN, Y SHENG, IC TI RESIDUAL-STRESS IN WELDMENT SO JOURNAL OF THERMAL STRESSES LA English DT Article; Proceedings Paper CT SYMP IN HONOR OF THE 65TH BIRTHDAY OF BRUNO A BOLEY, HELD AT THE 1991 WINTER ANNUAL MEETING OF THE AMERICAN SOC OF MECHANICAL ENGINEERS CY DEC 01-06, 1991 CL ATLANTA, GA SP AMER SOC MECH ENGINEERS AB A new computer model for welding by surface heating is used to predict the residual stresses in the weldment. By incorporating both solid and fluid phases during melting and solidification it is possible to monitor the complete history of the stress field, as well as the residual stress field. Predicted results when compared to an available experiment show qualitative agreements. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP CHEN, Y (reprint author), RUTGERS STATE UNIV,DEPT MECH & AEROSP ENGN,PISCATAWAY,NJ 08855, USA. NR 19 TC 16 Z9 16 U1 1 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0149-5739 J9 J THERM STRESSES JI J. Therm. Stresses PD JAN-MAR PY 1992 VL 15 IS 1 BP 53 EP 69 DI 10.1080/01495739208946120 PG 17 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA HM134 UT WOS:A1992HM13400007 ER PT J AU STOVALL, TK ARIMILLI, RV AF STOVALL, TK ARIMILLI, RV TI TRANSIENT THERMAL-ANALYSIS OF 3 FAST-CHARGING LATENT-HEAT STORAGE CONFIGURATIONS SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article AB A space-based thermal storage application must accept large quantities of heat in a short period of time at an elevated temperature. A model of a lithium hydride phase change energy storage system was used to estimate reasonable physical dimensions for this application, which included the use of a liquid metal heat transfer fluid. A finite difference computer code was developed and used to evaluate three methods of enhancing heat transfer in the phase change material energy storage system. None of the following methods, inserting thin fins, reticulated nickel, or liquid lithium, significantly improved the system performance. The use of a 95% void fraction reticulated nickel insert was found to increase the storage capacity (total energy stored) of the system slightly with only a small decrease in the system energy density (energy storage/system mass). The addition of 10% liquid lithium was found to cause minor increases in both storage density and storage capacity with the added benefit of reducing the hydrogen pressure of the lithium hydride. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. UNIV TENNESSEE, DEPT MECH & AEROSP ENGN, KNOXVILLE, TN 37996 USA. NR 8 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 0887-8722 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JAN-MAR PY 1992 VL 6 IS 1 BP 152 EP 157 DI 10.2514/3.331 PG 6 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA HX492 UT WOS:A1992HX49200022 ER PT J AU BRENNAN, TM TSAO, JY HAMMONS, BE AF BRENNAN, TM TSAO, JY HAMMONS, BE TI REACTIVE STICKING OF AS-4 DURING MOLECULAR-BEAM HOMOEPITAXY OF GAAS, ALAS, AND INAS SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID ENERGY ELECTRON-DIFFRACTION; SCANNING TUNNELING MICROSCOPY; SURFACE-STOICHIOMETRY; MASS-SPECTROMETRY; PHASE-DIAGRAMS; EPITAXY; REFLECTION; GROWTH; MBE; OSCILLATIONS AB We have measured transient and steady-state reflected As4 and desorbing As2 fluxes during molecular beam homoepitaxy on the (001) surfaces of GaAs, AlAs, and InAs. In the absence of growth, the reflected As4 flux decreases, and the desorbing As2 flux increases, with increasing temperature. In the presence of growth, both fluxes decrease linearly, and then saturate, with increasing group III flux. The saturated reflected As4 flux depends on temperature, and ranges from approximately 1/2 at temperatures commonly associated with high-quality epitaxy, to zero at lower temperatures; the saturated desorbing As2 flux is zero, independent of temperature. The reflected As4 (but not the desorbing As2) flux also depends on surface reconstruction, resulting in unexpected transients as surfaces sequence through various reconstructions upon initiation of growth. RP BRENNAN, TM (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 32 TC 25 Z9 25 U1 2 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD JAN-FEB PY 1992 VL 10 IS 1 BP 33 EP 45 DI 10.1116/1.578147 PG 13 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA GZ443 UT WOS:A1992GZ44300004 ER PT J AU GODECHOT, X BROWN, IG AF GODECHOT, X BROWN, IG TI LOW-ENERGY METAL-ION SOURCE SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Note AB We report here on some preliminary investigations of the characteristics of a metal vapor vacuum arc ion source operating in a low voltage mode so as to produce high current beams of metal ions at low energy. The 10-cm diameter, multiaperture beam formation electrodes were configured to an almost-symmetric accel-decel potential arrangement, and in this preliminary work the accel voltage was limited to just 4 kV. We produced a pulsed titanium ion beam with current up to 100 mA at 1.5 kV net extractor voltage. RP GODECHOT, X (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD JAN-FEB PY 1992 VL 10 IS 1 BP 254 EP 255 DI 10.1116/1.578145 PG 2 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA GZ443 UT WOS:A1992GZ44300037 ER PT J AU HAMZA, AV HUGHES, RS CHASE, LL LEE, HWH AF HAMZA, AV HUGHES, RS CHASE, LL LEE, HWH TI INVESTIGATION OF THE LASER-AL2O3 (1120) SURFACE INTERACTION USING EXCITATION BY PAIRS OF PICOSECOND LASER-PULSES SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article AB The lifetime of a laser-induced surface excitation on Al2O3 (1120BAR) that leads to detectable emission of neutral or positively charged particles and further to optical surface damage is measured to be a approximately 200 ps by varying the delay between pairs of 80 ps pulses at 1064 nm. The dependence of the emission threshold fluence on the time delay between laser pulses suggests a low order absorption process. RP HAMZA, AV (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 9 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD JAN-FEB PY 1992 VL 10 IS 1 BP 228 EP 230 DI 10.1116/1.586306 PG 3 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA HD569 UT WOS:A1992HD56900039 ER PT J AU HOFFBAUER, MA MCVEIGH, VJ ZUERLEIN, MJ AF HOFFBAUER, MA MCVEIGH, VJ ZUERLEIN, MJ TI ROTATIONALLY ANISOTROPIC 2ND-HARMONIC GENERATION STUDIES OF THE STRUCTURE AND THERMAL-STABILITY OF CU(110) SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article ID 2ND HARMONIC-GENERATION; SURFACE AB Rotationally anisotropic surface second-harmonic generation (SHG) has been used to investigate the surface structure and thermal stability of a clean, well-characterized Cu(110) single crystal surface in ultrahigh vacuum. The results show clear evidence of the sensitivity of optical SHG to changes in surface structure. At a fixed Cu(110) sample azimuthal angle, the temperature dependence of the second-harmonic radiation field from the surface was measured at two different wavelengths and found to be in agreement with other experiments performed using very different surface probes that show a sharp change in slope above approximately 600 K associated with a possible order-disorder transition. The rotationally anisotropic SH intensity from Cu(110) was found to dramatically decrease as the surface temperature was increased above approximately 600 K indicating a loss of surface order and symmetry. A simple model is proposed where thermally induced one-dimensional disordering accounts for all of the experimental observations between approximately 600 and approximately 800 K, and where the Cu(110) surface has thermally disordered in two-dimensions above approximately 800 K. RP HOFFBAUER, MA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV CHEM & LASER SCI,LOS ALAMOS,NM 87545, USA. NR 15 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD JAN-FEB PY 1992 VL 10 IS 1 BP 268 EP 273 DI 10.1116/1.586345 PG 6 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA HD569 UT WOS:A1992HD56900046 ER PT J AU THOR, AD MOORE, DH EDGERTON, SM KAWASAKI, ES REIHSAUS, E LYNCH, HT MARCUS, JN SMITH, HS AF THOR, AD MOORE, DH EDGERTON, SM KAWASAKI, ES REIHSAUS, E LYNCH, HT MARCUS, JN SMITH, HS TI ACCUMULATION OF P53 TUMOR SUPPRESSOR GENE PROTEIN IS AN INDEPENDENT MARKER OF PROGNOSIS IN BREAST CANCERS SO LABORATORY INVESTIGATION LA English DT Meeting Abstract C1 MASSACHUSETTS GEN HOSP,BOSTON,MA 02114. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CETUS CORP,EMERYVILLE,CA 94608. CREIGHTON UNIV,OMAHA,NE 68178. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0023-6837 J9 LAB INVEST JI Lab. Invest. PD JAN PY 1992 VL 66 IS 1 BP A18 EP A18 PG 1 WC Medicine, Research & Experimental; Pathology SC Research & Experimental Medicine; Pathology GA HA276 UT WOS:A1992HA27600113 ER PT J AU SCHIRMANN, D JURASZEK, D LANE, SM CAMPBELL, EM AF SCHIRMANN, D JURASZEK, D LANE, SM CAMPBELL, EM TI SCALING MODEL FOR HIGH-ASPECT-RATIO MICROBALLOON DIRECT-DRIVE IMPLOSIONS AT SHORT LASER WAVELENGTHS SO LASER AND PARTICLE BEAMS LA English DT Article ID YIELDS EXCEEDING 10(12); ABLATIVE IMPLOSION; EXPLODING-PUSHER; TARGETS; FUSION; RADIATION; DYNAMICS; IGNITION; PLASMAS AB A scaling model for hot spherical ablative implosions in direct-drive mode is presented The model results have been compared with experiments from LLE, ILE, and LLNL. Reduction of the neutron yield due to illumination nonuniformities is taken into account by the assumption that the neutron emission is cut off when the gas shock wave reflected off the center meets the incoming pusher, i.e., at a time when the probability of shell breakup is greatly enhanced. The main advantage of this semiempirical scaling model is that it elucidates the principal features of these simple implosions and permits one to estimate very quickly the performance of a high-aspect-ratio direct-drive target illuminated by short-wavelength laser light. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP SCHIRMANN, D (reprint author), CTR ETUD LIMEIL VALENTON,F-94195 VILLENEUVE ST GEO,FRANCE. NR 32 TC 3 Z9 3 U1 1 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0263-0346 J9 LASER PART BEAMS JI Laser Part. Beams PY 1992 VL 10 IS 1 BP 91 EP 108 PG 18 WC Physics, Applied SC Physics GA HH932 UT WOS:A1992HH93200008 ER PT J AU JOHNSON, WA WARNE, LK AF JOHNSON, WA WARNE, LK TI SIMPLE CIRCUIT MODELS FOR THE TERMINAL PROPERTIES OF A NONLINEAR CLOSING SWITCH SO LASER AND PARTICLE BEAMS LA English DT Article; Proceedings Paper CT CONF ON PHYSICS OF HIGH ENERGY DENSITY IN MATTER CY FEB 03-09, 1991 CL HIRSCHEGG, AUSTRIA AB Simple circuit models for the terminal properties of a ferromagnetic closing switch are derived under the assumptions that the ferromagnetic material may be described by a hysteresis profile and that the driving H-field quickly becomes large. Comparison with results from a full transmission line model indicates that all but the simplest of these approximate models is extremely accurate for a realistic switch. RP JOHNSON, WA (reprint author), SANDIA NATL LABS,DIV ELECTROMAGNET ANAL,ALBUQUERQUE,NM 87185, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0263-0346 J9 LASER PART BEAMS JI Laser Part. Beams PY 1992 VL 10 IS 2 BP 375 EP 385 PG 11 WC Physics, Applied SC Physics GA JK952 UT WOS:A1992JK95200012 ER PT J AU DRAKE, RP AF DRAKE, RP TI 3-WAVE PARAMETRIC-INSTABILITIES IN LONG-SCALE-LENGTH, SOMEWHAT PLANAR, LASER-PRODUCED PLASMAS SO LASER AND PARTICLE BEAMS LA English DT Article; Proceedings Paper CT 21ST EUROPEAN CONF ON LASER INTERACTION WITH MATTER ( ECLIM 91 ) CY OCT 21-25, 1991 CL WARSAW, POLAND ID STIMULATED RAMAN-SCATTERING; MU-M LASER; BRILLOUIN-SCATTERING; UNDERDENSE PLASMA; INHOMOGENEOUS PLASMAS; ABSOLUTE INSTABILITY; ELECTRON PRODUCTION; 2-COLOR EXPERIMENTS; COMPTON-SCATTERING; DECAY-INSTABILITY AB Three-wave parametric instabilities, in which an incident, laser-light wave resonantly decays into two decay waves, have long been recognized to potentially play a large role in the physics of laser-produced plasmas. Many effects have been predicted, but only gradually and with difficulty have experiments developed the ability to observe some of them. One obstacle has been that the behavior of the instabilities often depends upon the scale length and planarity of the plasma. My collaborators and I have worked for several years to overcome this specific obstacle and when necessary now work routinely with plasmas that are thousands of laser wavelengths in the axial and transverse scale lengths of the plasma parameters. This has allowed us to report the first observations of some instabilities and study the scaling behavior of several instabilities as well. C1 UNIV CALIF DAVIS,DAVIS,CA 95616. RP DRAKE, RP (reprint author), LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,LIVERMORE,CA 94550, USA. RI Drake, R Paul/I-9218-2012 OI Drake, R Paul/0000-0002-5450-9844 NR 104 TC 12 Z9 12 U1 0 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0263-0346 J9 LASER PART BEAMS JI Laser Part. Beams PY 1992 VL 10 IS 4 BP 599 EP 616 PG 18 WC Physics, Applied SC Physics GA KU472 UT WOS:A1992KU47200005 ER PT J AU LUSK, EL AF LUSK, EL TI CONTROLLING REDUNDANCY IN LARGE SEARCH SPACES - ARGONNE-STYLE THEOREM-PROVING THROUGH THE YEAR SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article ID OPEN QUESTIONS AB Argonne National Laboratory has been a center of research in automated theorem proving for nearly thirty years. In that time Argonne scientists and collaborators have developed a long series of theorem-proving systems with which to explore this fascinating field. Since the first systems of the mid-sixties, many features have changed of course, but others, perhaps the most fundamental, have remained the same. We survey here some of the history of those theorem-proving programs from the earliest to the most current, focusing in particular on the fundamental approach that has remained basically unchanged as a framework for the implementation of new ideas as they have come along. We will also try to identify the strengths and weaknesses of each of the systems by describing some of the problems that each could solve and could not solve, thus motivating the ideas for the next system. RP LUSK, EL (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 32 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 624 BP 96 EP 106 DI 10.1007/BFb0013052 PG 11 WC Computer Science, Artificial Intelligence SC Computer Science GA KV210 UT WOS:A1992KV21000009 ER PT J AU MCCUNE, W WOS, L AF MCCUNE, W WOS, L TI APPLICATION OF AUTOMATED DEDUCTION TO THE SEARCH FOR SINGLE AXIOMS FOR EXPONENT GROUPS SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article AB We present new results in axiomatic group theory obtained by using automated deduction programs. The results include single axioms, some with the identity and others without, for groups of exponents 3, 4, 5, and 7, and a general form for single axioms for groups of odd exponent. The results were obtained by using the programs in three separate ways: as a symbolic calculator, to search for proofs, and to search for counterexamples. We also touch on relations between logic programming and automated reasoning. RP MCCUNE, W (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 8 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 624 BP 131 EP 136 DI 10.1007/BFb0013055 PG 6 WC Computer Science, Artificial Intelligence SC Computer Science GA KV210 UT WOS:A1992KV21000012 ER PT J AU WOS, L AF WOS, L TI THE IMPOSSIBILITY OF THE AUTOMATION OF LOGICAL REASONING SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article RP WOS, L (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 607 BP 1 EP 3 PG 3 WC Computer Science, Artificial Intelligence SC Computer Science GA KV195 UT WOS:A1992KV19500002 ER PT J AU MCCUNE, W WOS, L AF MCCUNE, W WOS, L TI EXPERIMENTS IN AUTOMATED DEDUCTION WITH CONDENSED DETACHMENT SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article AB This paper contains the results of experiments with several search strategies on 112 problems involving condensed detachment. The problems are taken from nine different logic calculi: three versions of the two-valued sentential calculus, the many-valued sentential calculus, the implicational calculus, the equivalential calculus, the R calculus, the left group calculus, and the right group calculus. Each problem was given to the theorem prover OTTER and was run with at least three strategies: (1) a basic strategy, (2) a strategy with a more refined method for selecting clauses on which to focus, and (3) a strategy that uses the refined selection mechanism and deletes deduced formulas according to some simple rules. Two new features of OTTER are also presented: the refined method for selecting the next formula on which to focus, and a method for controlling memory usage. RP MCCUNE, W (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 22 TC 10 Z9 10 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 607 BP 209 EP 223 PG 15 WC Computer Science, Artificial Intelligence SC Computer Science GA KV195 UT WOS:A1992KV19500017 ER PT J AU LUSK, EL MCCUNE, WW SLANEY, J AF LUSK, EL MCCUNE, WW SLANEY, J TI ROO - A PARALLEL THEOREM PROVER SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article C1 AUSTRALIAN NATL UNIV,AUTOMATED REASONING PROJECT,CANBERRA,ACT 2600,AUSTRALIA. RP LUSK, EL (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 4 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 607 BP 731 EP 734 PG 4 WC Computer Science, Artificial Intelligence SC Computer Science GA KV195 UT WOS:A1992KV19500062 ER PT J AU LUSK, E WOS, L AF LUSK, E WOS, L TI BENCHMARK PROBLEMS IN WHICH EQUALITY PLAYS THE MAJOR ROLE SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article AB We have recently heard rumors that researchers are again studying paramodulation [7] in the context of strategy for its control. In part to facilitate such research, and in part to provide test problems for evaluating other approaches to equality-oriented reasoning, we offer in this article a set of benchmark problems in which equality plays the dominant role. The test problems are taken from group theory, ring theory, Robbins algebra, combinatory logic, and other areas. For each problem, we include appropriate clauses and comment as to its status with regard to provability by an unaided automated reasoning program. To complement the test problems, we offer various open questions. RP LUSK, E (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 607 BP 781 EP 785 PG 5 WC Computer Science, Artificial Intelligence SC Computer Science GA KV195 UT WOS:A1992KV19500073 ER PT J AU LUSK, EL MCCUNE, WW AF LUSK, EL MCCUNE, WW TI EXPERIMENTS WITH ROO, A PARALLEL AUTOMATED DEDUCTION SYSTEM SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article RP LUSK, EL (reprint author), ARGONNE NATL LAB, DIV MATH & COMP SCI, ARGONNE, IL 60439 USA. NR 23 TC 2 Z9 2 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0302-9743 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1992 VL 590 BP 139 EP 162 PG 24 WC Computer Science, Artificial Intelligence SC Computer Science GA KV181 UT WOS:A1992KV18100006 ER PT J AU GREENBERG, DS TAUBENFELD, G WANG, DW AF GREENBERG, DS TAUBENFELD, G WANG, DW TI CHOICE COORDINATION WITH MULTIPLE ALTERNATIVES SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article ID CONSENSUS AB The Choice Coordination Problem with k alternatives (k-CCP) was introduced by Rabin in 1982 [Rab82]. The goal is to design a wait-free protocol for n asynchronous processes which causes all correct processes to agree on one out of k possible alternatives. The agreement on a single choice is complicated by the fact that there is no a priori agreement on names for the alternatives. Furthermore processes must state their choice and do all communication via registers associated with the alternatives. We exactly characterize when the k-CCP can be solved deterministiclly, prove upper and lower space bounds for deterministic solutions, and provide a randomized protocol which is significantly better than the deterministic lower bound. C1 AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. YALE UNIV, NEW HAVEN, CT 06520 USA. RP GREENBERG, DS (reprint author), SANDIA NATL LABS, POB 5800, ALBUQUERQUE, NM 87185 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1992 VL 647 BP 54 EP 68 PG 15 WC Computer Science, Theory & Methods SC Computer Science GA LF706 UT WOS:A1992LF70600005 ER PT J AU BOYLE, JM CLINT, M FITZPATRICK, S HARMER, TJ AF BOYLE, JM CLINT, M FITZPATRICK, S HARMER, TJ TI THE CONSTRUCTION OF NUMERICAL MATHEMATICAL SOFTWARE FOR THE AMT DAP BY PROGRAM TRANSFORMATION SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article ID PARALLEL COMPUTATION; EIGENVECTORS; EIGENVALUES; ALGORITHMS C1 ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439. RP BOYLE, JM (reprint author), QUEENS UNIV BELFAST,DEPT COMP SCI,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. NR 11 TC 2 Z9 2 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1992 VL 634 BP 761 EP 767 PG 7 WC Computer Science, Theory & Methods SC Computer Science GA KQ204 UT WOS:A1992KQ20400092 ER PT J AU BERRENDORF, R AF BERRENDORF, R TI MEMORY ACCESS IN SHARED VIRTUAL MEMORY SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article AB Shared virtual memory (SVM) is a virtual memory layer with a single address space on top of a distributed real memory on parallel computers. We examine the behavior and performance of SVM running a parallel program with loop-level parallelism on top of it. A simulator for the underlying parallel architecture can be used to examine the behavior of SVM more deeply. The influence of several parameters, such as the number of processors, page size, cold or warm start, and restricted page replication, is studied. C1 ARGONNE NATL LAB, DIV MATH & COMP SCI, ARGONNE, IL 60439 USA. RP BERRENDORF, R (reprint author), FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, ZENT INST ANGEW MATH, POSTFACH 1913, W-5170 JULICH 1, GERMANY. NR 2 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1992 VL 634 BP 785 EP 786 PG 2 WC Computer Science, Theory & Methods SC Computer Science GA KQ204 UT WOS:A1992KQ20400099 ER PT J AU BROOKS, ED GORDA, BC WARREN, KH AF BROOKS, ED GORDA, BC WARREN, KH TI THE PCP PFP PROGRAMMING-MODELS ON THE BBN TC2000 SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 1ST INTERNATIONAL CONF ON PARALLEL COMPUTATION CY SEP 30-OCT 02, 1991 CL SALZBURG, AUSTRIA SP AUSTRIAN CTR PARALLEL COMPUTAT, AUSTRIAN MINIST SCI & RES, AUSTRIAN SCI FDN, GOVERNOR PROV SALZBURG, MAYOR CITY SALZBURG, AMT O O LANDESREGIER, KULTURABTEIL AMTES OBEROSTERREICH LANDESREGIER, KAMMER GEWERBLICHEN WIRTSCH OBERSTERREICH, LINZER HOCHSCHULFONDS, VEREINIG OSTERREICH IND LANDESGRP OBERSTERREICH AB We describe the PCP/PFP programming models which we are using on the BBN TC2000. The parallel programming models are implemented in a portable manner and will be useful on the scalable shared memory machines we expect to see in the future. We then describe the TC2000 machine architecture which is a scalable general purpose parallel architecture capable of efficiently supporting both shared memory and message passing programming paradigms. We also briefly describe a PCP implementation of the Gauss elimination algorithm which exploits the large local memories on the TC2000. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 12 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1992 VL 591 BP 65 EP 76 PG 12 WC Computer Science, Theory & Methods SC Computer Science GA LE836 UT WOS:A1992LE83600006 ER PT J AU BETH, T FRISCH, M SIMMONS, GJ AF BETH, T FRISCH, M SIMMONS, GJ TI PUBLIC-KEY CRYPTOGRAPHY - STATE-OF-THE-ART AND FUTURE-DIRECTIONS - EISS WORKSHOP OBERWOLFACH, GERMANY, JULY 3-6, 1991 - FINAL REPORT SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Review ID ELLIPTIC-CURVES; DISCRETE LOGARITHMS; DICKSON POLYNOMIALS; FACTORING ALGORITHM; DIGITAL-SIGNATURES; TIME ALGORITHM; CRYPTOSYSTEMS; CRYPTANALYSIS; FIELDS; RSA C1 UNIV KARLSRUHE,EUROPEAN INST SYST SECUR,W-7500 KARLSRUHE,GERMANY. SANDIA NATL LABS,NATL SECUR STUDIES,ALBUQUERQUE,NM 87185. NR 106 TC 0 Z9 0 U1 1 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1992 VL 578 BP R3 EP & PG 0 WC Computer Science, Theory & Methods SC Computer Science GA LE831 UT WOS:A1992LE83100001 ER PT J AU KHATRI, JN SILKS, LA DUNLAP, RB ODOM, JD KOSH, JW AF KHATRI, JN SILKS, LA DUNLAP, RB ODOM, JD KOSH, JW TI MUSCARINIC AND NICOTINIC ACTIVITIES OF THE NOVEL ACETYLCHOLINE ANALOG ACETYLSELENONIUM CHOLINE SO LIFE SCIENCES LA English DT Letter AB The present paper further characterizes the cholinergic properties of acetylselenonium choline (ASeCh, (CH3)2Se+CH2CH2OCOCH3). The data demonstrate that ASeCh possesses muscarinic receptor agonist properties as evidenced by vasodepressor and smooth muscle contractile activities which are enhanced by physostigmine and antagonized by atropine. ASeCh also possessed nicotinic agonist activity on frog rectus abdominis tissue which was potentiated by physostigmine, and blocked by d-tubocurarine. The relative potencies of ASeCh ranged from approximately 1 % to approximately 6 % of the potency of acetylcholine in the three types of preparations examined. C1 UNIV S CAROLINA,COLL PHARM,COLUMBIA,SC 29208. LOS ALAMOS NATL LAB,BIOCHEM & SPECT SECT,LOS ALAMOS,NM 87545. UNIV S CAROLINA,DEPT CHEM,COLUMBIA,SC 29208. NR 18 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0024-3205 J9 LIFE SCI JI Life Sci. PY 1992 VL 51 IS 22 BP PL213 EP PL218 PG 6 WC Medicine, Research & Experimental; Pharmacology & Pharmacy SC Research & Experimental Medicine; Pharmacology & Pharmacy GA JV279 UT WOS:A1992JV27900008 ER PT J AU KOWLURU, A KOWLURU, RA SOLOMON, S MARTINEZ, L AF KOWLURU, A KOWLURU, RA SOLOMON, S MARTINEZ, L TI PROTEIN GLYCATION - EFFECTS UPON PROTEIN RECOGNITION BY THE PROXIMAL TUBULE SO LIFE SCIENCES LA English DT Article ID ALBUMIN AB Reabsorption of I-125 labeled unmodified and glycated albumin by the proximal tubule was studied using micropuncture technique in wistar rats of different ages. The data show a significant reabsorption of unmodified albumin while the glycated albumin was virtually excluded from reabsorption process. Among different explanations considered, we think molecular charge of the protein seems to be a key factor for the altered recognition of glycated albumin by the proximal tubule. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV NEW MEXICO,SCH MED,DEPT PHYSIOL,ALBUQUERQUE,NM 87131. NR 15 TC 9 Z9 9 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0024-3205 J9 LIFE SCI JI Life Sci. PY 1992 VL 50 IS 4 BP 281 EP 286 DI 10.1016/0024-3205(92)90335-M PG 6 WC Medicine, Research & Experimental; Pharmacology & Pharmacy SC Research & Experimental Medicine; Pharmacology & Pharmacy GA GW862 UT WOS:A1992GW86200005 PM 1732700 ER PT B AU PERLACK, RD RANNEY, JW WRIGHT, LL AF PERLACK, RD RANNEY, JW WRIGHT, LL BE Cundiff, JS TI ENVIRONMENTAL EMISSIONS FROM BIOMASS ENERGY FEEDSTOCKS SO LIQUID FUELS FROM RENEWABLE RESOURCES LA English DT Proceedings Paper CT ALTERNATIVE ENERGY CONF : LIQUID FUELS FROM RENEWABLE RESOURCES CY DEC 14-15, 1992 CL NASHVILLE, TN SP US DOE, BIOFUELS FEEDBACK DEV PROGRAM, US DOE, OFF NATL PROGRAMS, USDA, OFF ENERGY, NATL WOOD ENERGY ASSOC, TENNESSEE DEPT ECON & COMMUNITY DEV DE FUEL CYCLE; BIOMASS; RENEWABLE; ENERGY; ENVIRONMENT; ETHANOL RP PERLACK, RD (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 0 TC 1 Z9 1 U1 0 U2 3 PU AMER SOC AGRICULTURAL ENGINEERS PI ST JOSEPH PA ST JOSEPH BN 0-929355-36-9 PY 1992 BP 58 EP 65 PG 8 WC Agronomy; Energy & Fuels; Engineering, Chemical; Food Science & Technology SC Agriculture; Energy & Fuels; Engineering; Food Science & Technology GA BX70F UT WOS:A1992BX70F00008 ER PT B AU DIEBOLD, JP OVEREND, R REJAI, B POWER, AJ AF DIEBOLD, JP OVEREND, R REJAI, B POWER, AJ BE Cundiff, JS TI REFORMULATED GASOLINE COMPONENTS PRODUCTION FROM RENEWABLE FEEDS SO LIQUID FUELS FROM RENEWABLE RESOURCES LA English DT Proceedings Paper CT ALTERNATIVE ENERGY CONF : LIQUID FUELS FROM RENEWABLE RESOURCES CY DEC 14-15, 1992 CL NASHVILLE, TN SP US DOE, BIOFUELS FEEDBACK DEV PROGRAM, US DOE, OFF NATL PROGRAMS, USDA, OFF ENERGY, NATL WOOD ENERGY ASSOC, TENNESSEE DEPT ECON & COMMUNITY DEV DE THERMOCHEMICAL; BIOMASS; ETHERS; REFORMULATED GASOLINE RP DIEBOLD, JP (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC AGRICULTURAL ENGINEERS PI ST JOSEPH PA ST JOSEPH BN 0-929355-36-9 PY 1992 BP 154 EP 161 PG 8 WC Agronomy; Energy & Fuels; Engineering, Chemical; Food Science & Technology SC Agriculture; Energy & Fuels; Engineering; Food Science & Technology GA BX70F UT WOS:A1992BX70F00018 ER PT B AU AGBLEVOR, FA REJAI, B WANG, D WISELOGEL, A CHUM, HL KEANY, F AF AGBLEVOR, FA REJAI, B WANG, D WISELOGEL, A CHUM, HL KEANY, F BE Cundiff, JS TI THERMOCHEMICAL CONVERSION OF BIOMASS TO FUELS AND CHEMICALS - THE EFFECT OF STORAGE-CONDITIONS ON PYROLYSIS PRODUCTS SO LIQUID FUELS FROM RENEWABLE RESOURCES LA English DT Proceedings Paper CT ALTERNATIVE ENERGY CONF : LIQUID FUELS FROM RENEWABLE RESOURCES CY DEC 14-15, 1992 CL NASHVILLE, TN SP US DOE, BIOFUELS FEEDBACK DEV PROGRAM, US DOE, OFF NATL PROGRAMS, USDA, OFF ENERGY, NATL WOOD ENERGY ASSOC, TENNESSEE DEPT ECON & COMMUNITY DEV DE SUGARCANE BAGASSE; BIOMASS; HEXOSANS; LIGNIN; PENTOSANS; PYROLYSIS; STORAGE PILES; THERMOCHEMICAL CONVERSION RP AGBLEVOR, FA (reprint author), NATL RENEWABLE ENERGY LAB,CHEM TECHNOL RES BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER SOC AGRICULTURAL ENGINEERS PI ST JOSEPH PA ST JOSEPH BN 0-929355-36-9 PY 1992 BP 201 EP 214 PG 14 WC Agronomy; Energy & Fuels; Engineering, Chemical; Food Science & Technology SC Agriculture; Energy & Fuels; Engineering; Food Science & Technology GA BX70F UT WOS:A1992BX70F00022 ER PT B AU LUSK, EL AF LUSK, EL BE Voronkov, A TI CONTROLLING REDUNDANCY IN LARGE SEARCH SPACES - ARGONNE-STYLE THEOREM-PROVING THROUGH THE YEAR SO LOGIC PROGRAMMING AND AUTOMATED REASONING SE LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT INTERNATIONAL CONF ON LOGIC PROGRAMMING AND AUTOMATED REASONING ( LPAR 92 ) CY JUL 15-20, 1992 CL ST PETERSBURG, RUSSIA SP INT JOINT CONF ARTIFICIAL INTELLIGENCE, EUROPEAN COMP IND RES CTR RP LUSK, EL (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA BERLIN BN 3-540-55727-X J9 LECT NOTES ARTIF INT PY 1992 VL 624 BP 96 EP 106 DI 10.1007/BFb0013052 PG 11 GA BX77L UT WOS:A1992BX77L00009 ER PT B AU MCCUNE, W WOS, L AF MCCUNE, W WOS, L BE Voronkov, A TI APPLICATION OF AUTOMATED DEDUCTION TO THE SEARCH FOR SINGLE AXIOMS FOR EXPONENT GROUPS SO LOGIC PROGRAMMING AND AUTOMATED REASONING SE LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT INTERNATIONAL CONF ON LOGIC PROGRAMMING AND AUTOMATED REASONING ( LPAR 92 ) CY JUL 15-20, 1992 CL ST PETERSBURG, RUSSIA SP INT JOINT CONF ARTIFICIAL INTELLIGENCE, EUROPEAN COMP IND RES CTR RP MCCUNE, W (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA BERLIN BN 3-540-55727-X J9 LECT NOTES ARTIF INT PY 1992 VL 624 BP 131 EP 136 DI 10.1007/BFb0013055 PG 6 GA BX77L UT WOS:A1992BX77L00012 ER PT B AU WANG, N BARNES, PD DASILVA, A ELLMAN, B EMES, J HALLER, EE GIRAUDHERAUD, Y LANGE, A ROSS, R SADOULET, B SHUTT, T STUBBS, C YVON, D AF WANG, N BARNES, PD DASILVA, A ELLMAN, B EMES, J HALLER, EE GIRAUDHERAUD, Y LANGE, A ROSS, R SADOULET, B SHUTT, T STUBBS, C YVON, D BE Booth, NE Salmon, GL TI PROPERTIES OF NTD GE AND IMPLANTATION OF NTD GE SENSORS IN A LARGE COMPOSITE PHONON DETECTOR SO LOW TEMPERATURE DETECTORS FOR NEUTRINOS AND DARK MATTER IV LA English DT Proceedings Paper CT IVth International Workshop on Low Temperature Detectors for Neutrinos and Dark Matter (LTD-4) CY SEP 04-07, 1991 CL OXFORD, ENGLAND SP UNIV OXFORD, DEPT PHYS, INST PHYS, NUCL & PARTICLE PHYS DIV, INST PHYS, HIGH ENERGY PARTICLE PHYS GRP, LECROY LTD, OXFORD INSTRUMENTS LTD C1 LAWRENCE BERKELEY LAB,DEPT PHYS,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720. RI Yvon, Dominique/D-2280-2015 NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-113-7 PY 1992 BP 109 EP 123 PG 15 WC Physics, Applied; Physics, Condensed Matter; Physics, Particles & Fields SC Physics GA BB01T UT WOS:A1992BB01T00013 ER PT B AU LABOV, S SILVER, E LEGROS, M BLAND, RW DICKSON, SC DIGNAN, TG LAWS, K JOHNSON, RT SIMON, MW STRICKER, DA WATSON, RM MADDEN, N LANDIS, D AF LABOV, S SILVER, E LEGROS, M BLAND, RW DICKSON, SC DIGNAN, TG LAWS, K JOHNSON, RT SIMON, MW STRICKER, DA WATSON, RM MADDEN, N LANDIS, D BE Booth, NE Salmon, GL TI ALUMINUM TUNNEL JUNCTION DETECTOR OPERATION IN AN ADIABATIC DEMAGNETIZATION REFRIGERATOR SO LOW TEMPERATURE DETECTORS FOR NEUTRINOS AND DARK MATTER IV LA English DT Proceedings Paper CT IVth International Workshop on Low Temperature Detectors for Neutrinos and Dark Matter (LTD-4) CY SEP 04-07, 1991 CL OXFORD, ENGLAND SP UNIV OXFORD, DEPT PHYS, INST PHYS, NUCL & PARTICLE PHYS DIV, INST PHYS, HIGH ENERGY PARTICLE PHYS GRP, LECROY LTD, OXFORD INSTRUMENTS LTD C1 LAWRENCE LIVERMORE NATL LAB,EXPTL ASTROPHYS LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-113-7 PY 1992 BP 285 EP 290 PG 6 WC Physics, Applied; Physics, Condensed Matter; Physics, Particles & Fields SC Physics GA BB01T UT WOS:A1992BB01T00030 ER PT B AU GABUTTI, A GRAY, KE AF GABUTTI, A GRAY, KE BE Booth, NE Salmon, GL TI SELF-RECOVERING SUPERCONDUCTING STRIP DETECTORS SO LOW TEMPERATURE DETECTORS FOR NEUTRINOS AND DARK MATTER IV LA English DT Proceedings Paper CT IVth International Workshop on Low Temperature Detectors for Neutrinos and Dark Matter (LTD-4) CY SEP 04-07, 1991 CL OXFORD, ENGLAND SP UNIV OXFORD, DEPT PHYS, INST PHYS, NUCL & PARTICLE PHYS DIV, INST PHYS, HIGH ENERGY PARTICLE PHYS GRP, LECROY LTD, OXFORD INSTRUMENTS LTD C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-113-7 PY 1992 BP 333 EP 341 PG 9 WC Physics, Applied; Physics, Condensed Matter; Physics, Particles & Fields SC Physics GA BB01T UT WOS:A1992BB01T00035 ER PT B AU MILEY, HS ARTHUR, RJ BRODZINSKI, RL HENSLEY, WK REEVES, JH AVIGNONE, FT AF MILEY, HS ARTHUR, RJ BRODZINSKI, RL HENSLEY, WK REEVES, JH AVIGNONE, FT BE Booth, NE Salmon, GL TI LOW-BACKGROUND DETECTORS FOR EXOTIC PHYSICS EXPERIMENTS SO LOW TEMPERATURE DETECTORS FOR NEUTRINOS AND DARK MATTER IV LA English DT Proceedings Paper CT IVth International Workshop on Low Temperature Detectors for Neutrinos and Dark Matter (LTD-4) CY SEP 04-07, 1991 CL OXFORD, ENGLAND SP UNIV OXFORD, DEPT PHYS, INST PHYS, NUCL & PARTICLE PHYS DIV, INST PHYS, HIGH ENERGY PARTICLE PHYS GRP, LECROY LTD, OXFORD INSTRUMENTS LTD C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-113-7 PY 1992 BP 499 EP 510 PG 12 WC Physics, Applied; Physics, Condensed Matter; Physics, Particles & Fields SC Physics GA BB01T UT WOS:A1992BB01T00053 ER PT J AU OBLOW, EM AF OBLOW, EM TI IMPLEMENTING VALIANT LEARNABILITY THEORY USING RANDOM SETS SO MACHINE LEARNING LA English DT Article DE PAC-LEARNING; VALIANT LEARNABILITY THEORY; BOOLEAN CLASSIFIERS; LEARNING FROM EXAMPLES AB A general learning framework which uses random sets is introduced for solving discrete-space classification problems. This framework is based on the pac-learning formalism introduced by Valiant (1984) and generalized in set-theoretic terms by Blumer, et al., (1989). The random set version of this theory is used to develop an algorithm which is a particularly efficient search scheme. This is accomplished by recasting the representational class and constructive proof presented in Valiant (1984) into random set terms and implementing it as an exhaustive search algorithm. The algorithm is a problem-specific incremental (psi) approach in that it satisfies learnability criteria for distribution-specific problems as examples are being sampled. Some theoretical and empirical analyses are presented to demonstrate the convergent pac-learnability and sample complexity of this psi-algorithm. Its performance is then tested on the multiplexor class of problems. This class has been analyzed by others as a benchmark for decision trees and genetic classifiers. Results from these test cases show that, despite using an exhaustive search, this random set implementation is computationally competitive with these more established methods (which use empirically proven heuristics). Conclusions are drawn about potential further improvements in the efficiency of this approach. RP OBLOW, EM (reprint author), OAK RIDGE NATL LAB, DIV ENGN PHYS & MATH, POB 2008, OAK RIDGE, TN 37831 USA. NR 23 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0885-6125 EI 1573-0565 J9 MACH LEARN JI Mach. Learn. PD JAN PY 1992 VL 8 IS 1 BP 45 EP 73 DI 10.1007/BF00994005 PG 29 WC Computer Science, Artificial Intelligence SC Computer Science GA HG431 UT WOS:A1992HG43100002 ER PT J AU STUBBS, L AF STUBBS, L TI LONG-RANGE WALKING TECHNIQUES IN POSITIONAL CLONING STRATEGIES SO MAMMALIAN GENOME LA English DT Review ID YEAST ARTIFICIAL-CHROMOSOME; FIELD GEL-ELECTROPHORESIS; NOTI LINKING LIBRARY; FRAGILE-X SYNDROME; MOUSE T-COMPLEX; POLYMERASE CHAIN-REACTION; HUNTINGTON DISEASE GENE; SEX-DETERMINING REGION; CYSTIC-FIBROSIS LOCUS; MAMMALIAN GENOMIC DNA C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. OI Stubbs, Lisa/0000-0002-9556-1972 NR 119 TC 15 Z9 15 U1 1 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-8990 J9 MAMM GENOME JI Mamm. Genome PY 1992 VL 3 IS 3 BP 127 EP 142 DI 10.1007/BF00352457 PG 16 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA JT432 UT WOS:A1992JT43200001 PM 1617220 ER PT J AU RINCHIK, EM MAGNUSON, T HOLDENERKENNY, B KELSEY, G BIANCHI, A CONTI, CJ CHARTIER, F BROWN, KA BROWN, SDM PETERS, J AF RINCHIK, EM MAGNUSON, T HOLDENERKENNY, B KELSEY, G BIANCHI, A CONTI, CJ CHARTIER, F BROWN, KA BROWN, SDM PETERS, J TI MOUSE CHROMOSOME-7 SO MAMMALIAN GENOME LA English DT Article; Proceedings Paper CT 6TH INTERNATIONAL WORKSHOP ON MOUSE GENOME MAPPING CY OCT 11-15, 1992 CL BUFFALO, NY SP APPL BIOSYST, BIO RAD LABS, BIOS LABS, BOEHRINGER MANNHEIM, CHARLES RIVER LABS, COSTAR, HOFFMAN LAROCHE, JAPAN IMMUNORES LABS, LAB PROD SALES, LIFE TECHNOL ID ALBINO-DELETION COMPLEX; GLANDULAR KALLIKREIN GENES; MURINE LEUKEMIA-VIRUS; RECOMBINANT-INBRED STRAINS; MAMMARY-TUMOR VIRUSES; RECEPTOR GENE; BINDING-PROTEIN; CDNA CLONING; DEVELOPMENTAL REGULATION; EXTRAEMBRYONIC ECTODERM C1 CASE WESTERN RESERVE UNIV,DEPT GENET,CLEVELAND,OH 44106. GERMAN CANC RES CTR,INST CELL & TUMOR BIOL,W-6900 HEIDELBERG 1,GERMANY. MD ANDERSON CANC CTR,SCI PK,TX 78957. ST MARYS HOSP,SCH MED,DEPT BIOCHEM & MOLEC GENET,LONDON,ENGLAND. MRC,RADIOBIOL UNIT,DIDCOT,OXON,ENGLAND. RP RINCHIK, EM (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. FU NHGRI NIH HHS [HG 00370]; NICHD NIH HHS [HD24462]; NIGMS NIH HHS [GM14557] NR 195 TC 28 Z9 28 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-8990 J9 MAMM GENOME JI Mamm. Genome PY 1992 VL 3 SI SI BP S104 EP S120 DI 10.1007/BF00648425 PG 17 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA JT439 UT WOS:A1992JT43900007 PM 1498426 ER PT J AU KLEBIG, ML KWON, BS RINCHIK, EM AF KLEBIG, ML KWON, BS RINCHIK, EM TI PHYSICAL ANALYSIS OF MURINE ALBINO DELETIONS THAT DISRUPT LIVER-SPECIFIC GENE-REGULATION OR MESODERM DEVELOPMENT SO MAMMALIAN GENOME LA English DT Article ID DUCHENNE MUSCULAR-DYSTROPHY; MOUSE CHROMOSOME-7; LOCUS REGION; DNA; CLONING; COMPLEX; EXPRESSION; TYROSINASE; ENZYMES; MICE AB Complementation analyses of radiation-induced deletion mutations involving the albino (c) locus in Chromosome (Chr) 7 of the mouse have identified several loci, in addition to c, that have important roles in development. The "mesoderm-deficient" (msd) and "hepatocyte-specific developmental regulation-1" (hsdr-1) loci, which are proximal and tightly linked to c, are important in the formation of mesoderm and in the regulation of liver- and kidney-specific induction of various enzymes and proteins, respectively. Cloning deletion-breakpoint-fusion fragments caused by lethal albino deletions that genetically define the extents of the msd and hsdr-1 loci is one way of generating molecular probes for studying the gene(s) involved in these phenotypes. The distal breakpoints of five such deletions were positioned on a long-range (PFGE) map of approximately 1.7 Mb of wild-type DNA surrounding the c, D7Was12, and Emv-23 loci. In addition, the distal breakpoints of two viable albino deletions, which remove part of the tyrosinase gene and extend distally, were localized in the vicinity of the lethal deletion breakpoints. Therefore, the viable deletions can be exploited to generate additional DNA probes that should facilitate the isolation of breakpoint clones from chromosomes carrying lethal deletions defining hsdr-1 and msd. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37830. INDIANA UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,INDIANAPOLIS,IN 46202. INDIANA UNIV,SCH MED,WALTHER ONCOL CTR,INDIANAPOLIS,IN 46202. NR 57 TC 20 Z9 20 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-8990 J9 MAMM GENOME JI Mamm. Genome PY 1992 VL 2 IS 1 BP 51 EP 63 PG 13 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA GY547 UT WOS:A1992GY54700006 PM 1543902 ER PT J AU NARAYANSWAMI, S DOGGETT, NA CLARK, LM HILDEBRAND, CE WEIER, HU HAMKALO, BA AF NARAYANSWAMI, S DOGGETT, NA CLARK, LM HILDEBRAND, CE WEIER, HU HAMKALO, BA TI CYTOLOGICAL AND MOLECULAR CHARACTERIZATION OF CENTROMERES IN MUS-DOMESTICUS AND MUS-SPRETUS SO MAMMALIAN GENOME LA English DT Article ID MOUSE SATELLITE DNA; MINOR SATELLITE; TELOMERES; SEQUENCE; ORGANIZATION; HETEROCHROMATIN; LOCALIZATION; CHROMOSOMES; (TTAGGG)N; MUSCULUS AB We have applied EM in situ hybridization (EMISH) and pulsed field gel electrophoresis (PFGE) to samples from diploid primary cell cultures and an established cell line to examine in detail the relative organization of the major and minor satellite DNAs and telomere sequences in the genomes of Mus domesticus and Mus spretus. EMISH localizes the Mus domesticus minor satellite to a single site at the centromere-proximal end of each chromosome. Double label hybridizations with both minor satellite and telomere probes show that they are in close proximity and possibly are linked. In fact, PFGE of M. domesticus DNA digested with Sal I and Sfi I reveals the presence of fragments which hybridize to both probes and is consistent with the physical linkage of these two sequences. The M. domesticus minor satellite is the more abundant satellite in Mus spretus. Its distribution in M. spretus is characterized by diffuse labeling with no obvious concentration near chromosome ends. In addition to this repeat the M. spretus genome contains a small amount of DNA that hybridizes to a M. domesticus major satellite probe. Unlike the M. domesticus minor satellite, it is not telomere proximal but is confined to a domain at the border of the centromere and the long arm. Thus, although both species possess all three sequences, except for the telomeres, their distribution relative to one another is not conserved. Based on the results presented, we propose preliminary molecular maps of the centromere regions of Mus domesticus and Mus spretus. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550. RP NARAYANSWAMI, S (reprint author), UNIV CALIF IRVINE,DEPT MOLEC BIOL & BIOCHEM,IRVINE,CA 92717, USA. FU NIGMS NIH HHS [GM 23241] NR 22 TC 31 Z9 31 U1 0 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-8990 J9 MAMM GENOME JI Mamm. Genome PY 1992 VL 2 IS 3 BP 186 EP 194 DI 10.1007/BF00302876 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA HA601 UT WOS:A1992HA60100005 PM 1543911 ER PT J AU GLIMM, J LINDQUIST, B PEREIRA, F PEIERLS, R AF GLIMM, J LINDQUIST, B PEREIRA, F PEIERLS, R TI THE MULTI-FRACTAL HYPOTHESIS AND ANOMALOUS DIFFUSION SO MATEMATICA APLICADA E COMPUTACIONAL LA English DT Article DE RANDOM FIELDS; POROUS MEDIA; HETEROGENEITY; MULTI-FRACTALS; DIFFUSIVITY; ANOMALOUS DIFFUSION ID FICKIAN SUBSURFACE DISPERSION; QUASI-LINEAR THEORY; HYDRAULIC CONDUCTIVITIES; GEOLOGIC MEDIA; TRANSPORT; MODELS AB Stochastic partial differential equations model random events in physical systems In this paper we are concerned with multiple length scale, not necessarily self similar, random fields in the context of linear transport equations. Infrared (long length scale) divergences in the terms of a perturbation expansion for this theory correspond to anomalous diffusion in the ensemble averaged equations. Correlations in geological flow data which decay at spatial infinity give rise to super-renormalizable infrared divergences while those which do not are nonrenormalizable. Results of computational solutions of the stochastic equations are related to theoretical predictions and field data. Multi-fractal correlations which decay slowly at infinity are shown to be consistent with field data. C1 SUNY STONY BROOK,DEPT APPL MATH & STAT,STONY BROOK,NY 11794. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 23 TC 15 Z9 15 U1 0 U2 0 PU BIRKHAUSER BOSTON INC PI CAMBRIDGE PA 675 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139 SN 0101-8205 J9 MAT APL COMPUT PY 1992 VL 11 IS 2 BP 189 EP 207 PG 19 WC Mathematics, Applied SC Mathematics GA KU383 UT WOS:A1992KU38300005 ER PT J AU HONG, YP PAN, CT AF HONG, YP PAN, CT TI RANK-REVEALING QR FACTORIZATIONS AND THE SINGULAR VALUE DECOMPOSITION SO MATHEMATICS OF COMPUTATION LA English DT Article DE SINGULAR VALUE DECOMPOSITION; RANK-REVEALING QR FACTORIZATION; NUMERICAL RANK; NUMERICAL NULL SPACE ID SYSTEMS; MATRIX AB T. Chan has noted that, even when the singular value decomposition of a matrix A is known, it is still not obvious how to find a rank-revealing QR factorization (RRQR) of A if A has numerical rank deficiency. This paper offers a constructive proof of the existence of the RRQR factorization of any matrix A of size m x n with numerical rank r. The bounds derived in this paper that guarantee the existence of RRQR are all of order square-root nr, in comparison with Chan's O(2n-r). It has been known for some time that if A is only numerically rank-one deficient, then the column permutation-PI of A that guarantees a small r(nn) in the QR factorization of A-PI can be obtained by inspecting the size of the elements of the right singular vector of A corresponding to the smallest singular value of A. To some extent, our paper generalizes this well-known result. C1 ARGONNE NATL LAB,RES PARTICIPAT PROGRAM,ARGONNE,IL 60439. RP HONG, YP (reprint author), NO ILLINOIS UNIV,DEPT MATH SCI,DE KALB,IL 60115, USA. NR 21 TC 74 Z9 74 U1 0 U2 0 PU AMER MATHEMATICAL SOC PI PROVIDENCE PA 201 CHARLES ST, PROVIDENCE, RI 02940-2213 SN 0025-5718 J9 MATH COMPUT JI Math. Comput. PD JAN PY 1992 VL 58 IS 197 BP 213 EP 232 DI 10.2307/2153029 PG 20 WC Mathematics, Applied SC Mathematics GA HB546 UT WOS:A1992HB54600014 ER PT J AU HUI, TE FISHER, DR PRESS, OW EARY, JF WEINSTEIN, JN BADGER, CC BERNSTEIN, ID AF HUI, TE FISHER, DR PRESS, OW EARY, JF WEINSTEIN, JN BADGER, CC BERNSTEIN, ID TI LOCALIZED BETA DOSIMETRY OF I-131-LABELED ANTIBODIES IN FOLLICULAR LYMPHOMA SO MEDICAL PHYSICS LA English DT Article ID MODELING ANALYSIS; RADIOIMMUNOTHERAPY; RADIONUCLIDES; TUMORS AB The purpose of this study is to assess the multicellular dosimetry of I-131-labeled antibody in follicular lymphoma based on histological measurements on human tumor biopsy tissue. Photomicrographs of lymph node specimens were analyzed by first-order treatment to determine the mean values and statistical variations of the radii of follicles (260 +/- 90-mu-m), interfollicular distances (740 +/- 160-mu-m), and the number density of follicles [60 +/- 18 in a volume of (2 x 1480-mu-m)3]. Based on these measurements, two geometrical models were developed for localized beta dosimetry. The first, a regular cubic lattice model, assumes no variation in follicular radius of follicles and interfollicular distance. The second, a randomized distribution model, is a more complicated but more realistic representation of observed histological specimens. In this model, Monte Carlo methods were used to reconstruct the spatial distribution of follicles by stimulating the distribution of the radii of follicles, interfollicular distances, and the number density of follicles. Dose calculations were performed using Berger's point kernels for absorbed-dose distribution for beta particles in water, assuming the I-113-labeled antibodies as point sources. It was assumed that the activity concentration of the labeled antibody within the follicles was ten times the activity concentration in the interfollicular spaces. The spatial distribution of localized dose was calculated for a tumor having an average dose of 40 Gy. The localized dose was found to be highly nonuniform, ranging from 20 to 90 Gy, and varying by a factor of about 2 from the average tumor dose. Most of the tissue (70%-80% by volume) was found to receive a lower dose than the average tumor dose. No significant difference in localized dose distribution was found between the regular cubic lattice model and the randomized distribution model, suggesting that sometimes a simple geometrical model may be adequate as a starting point for dosimetry of more complex situations. Finally, the localized dose distribution is discussed in terms of its usefulness for extracting information such as the mean dose, the spatial variation of dose, and the fraction of tissue receiving various absorbed doses. An approach for applying localized dosimetry to improve the estimated cell-killing efficiency is suggested. C1 UNIV WASHINGTON, MED CTR, SEATTLE, WA 98195 USA. NCI, BETHESDA, MD 20892 USA. FRED HUTCHINSON CANC RES CTR, SEATTLE, WA 98104 USA. RP HUI, TE (reprint author), PACIFIC NW LAB, DEPT HLTH PHYS, K3-51,POB 999, RICHLAND, WA 99352 USA. FU NCI NIH HHS [CA44991] NR 16 TC 25 Z9 25 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0094-2405 J9 MED PHYS JI Med. Phys. PD JAN-FEB PY 1992 VL 19 IS 1 BP 97 EP 104 DI 10.1118/1.596932 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HE208 UT WOS:A1992HE20800012 PM 1620064 ER PT J AU PETTI, PL AF PETTI, PL TI DIFFERENTIAL-PENCIL-BEAM DOSE CALCULATIONS FOR CHARGED-PARTICLES SO MEDICAL PHYSICS LA English DT Article DE CHARGED PARTICLES; MULTIPLE SCATTERING; DOSE CALCULATION MODELS; MONTE-CARLO TECHNIQUES ID INHOMOGENEITIES; RADIOTHERAPY AB The use of a convolution or differential-pencil-beam (DPB) algorithm has been studied for charged-particle dose calculations as a means of more accurately modeling the effects of multiple scattering. Such effects are not reflected in current charged-particle dose calculations since these calculations rely on depth-dose data measured in homogeneous water-equivalent phantoms and use ray-tracing techniques to calculate the water-equivalent pathlength from patient CT data. In this study, isodose plots were generated from three-dimensional dose calculations using Monte Carlo, DPB, and standard ray-tracing methods for a 4-cm modulated 150-MeV proton beam incident on both homogeneous and heterogeneous phantoms. To simulate therapy conditions with charged particles, these studies included cases where compensating boluses were introduced to modify the particle range across the treatment field. Results indicate that multiple-scattering effects, including increased penumbral width as a function of beam penetration and the "smearing" of isodose distributions downstream from complex heterogeneities, are well modeled by the DPB algorithm. The DPB algorithm may also be used to obtain more useful estimates of the dose uncertainty in regions near the end of the beam's range downstream from complex heterogeneities than can be derived from standard ray-tracing calculations. RP PETTI, PL (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED,BERKELEY,CA 94720, USA. FU NCI NIH HHS [CA48900] NR 23 TC 98 Z9 98 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0094-2405 J9 MED PHYS JI Med. Phys. PD JAN-FEB PY 1992 VL 19 IS 1 BP 137 EP 149 DI 10.1118/1.596887 PG 13 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HE208 UT WOS:A1992HE20800016 PM 1320182 ER PT J AU VERHEY, LJ LYMAN, JT AF VERHEY, LJ LYMAN, JT TI SOME CONSIDERATIONS REGARDING W-VALUES FOR HEAVY CHARGED-PARTICLE RADIOTHERAPY SO MEDICAL PHYSICS LA English DT Article C1 MASSACHUSETTS GEN HOSP,DEPT RADIAT ONCOL,BOSTON,MA 02114. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720. FU NCI NIH HHS [CA22286] NR 12 TC 13 Z9 13 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0094-2405 J9 MED PHYS JI Med. Phys. PD JAN-FEB PY 1992 VL 19 IS 1 BP 151 EP 153 DI 10.1118/1.596888 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HE208 UT WOS:A1992HE20800017 PM 1620040 ER PT J AU WELLER, RE COLLINS, WE BUSCHBOM, RL MALAGA, CA RAGAN, HA AF WELLER, RE COLLINS, WE BUSCHBOM, RL MALAGA, CA RAGAN, HA TI IMPAIRED RENAL-FUNCTION IN OWL MONKEYS (AOTUS-NANCYMAI) INFECTED WITH PLASMODIUM-FALCIPARUM SO MEMORIAS DO INSTITUTO OSWALDO CRUZ LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONGRESS ON MALARIA AND BABESIOSIS CY AUG 13-17, 1991 CL RIO DE JANEIRO, BRAZIL SP FDN MARCEL MERIEUX, FUNDACAO NACL SAUDE, CONSELHO NACL DESENVOLVIMENTO CIENT & TECNOL, FINANCIADORA ESTUDOS & PROJETOS, FAO, PAN AMER HLTH ORG, BANCO BRASILEIRO DESCONTOS SA, COODENACAO APERFEICOAMENTO PESSOAL NIVEL SUPER, CARL ZEISS BRASIL, BRIT COUNCIL DE AOTUS-NANCYMAI; PLASMODIUM-FALCIPARUM; IMPAIRED RENAL FUNCTION; PATHOLOGY; PALO ALTO STRAIN ID BETA-D-GLUCOSAMINIDASE; MALARIA; PRINCIPLE; PATHOLOGY; SUBSTRATE; PROTEIN; SERUM; ASSAY; NAG AB Impaired renal function was observed in sixteen Aotus nancymai 25 and 3 months following infection with the Uganda Palo Alto strain of Plasmodium falciparum- Decrease were noted in the clearance of endogenous creatinine, creatinine excretion, and urine volume while increases were observed in serum urea nitrogen, urine protein, urine potassium, fractional excretion of phosphorus and potassium, and activities of urinary enzymes. The results were suggestive of glomerulonephropathy and chronic renal disease. C1 CTR INFECT DIS, ATLANTA, GA USA. UNIV PUERTO RICO, SAN JUAN, PR 00936 USA. RP WELLER, RE (reprint author), PACIFIC NW LAB, POB 999, P7-52, RICHLAND, WA 99352 USA. NR 45 TC 4 Z9 4 U1 0 U2 0 PU MEM INST OSWALDO CRUZ PI RIO DE JANEIRO PA SECRETARY CAIXA POSTAL 926, 20001 RIO DE JANEIRO, RJ, BRAZIL SN 0074-0276 J9 MEM I OSWALDO CRUZ JI Mem. Inst. Oswaldo Cruz PY 1992 VL 87 SU 3 BP 435 EP 442 PG 8 WC Parasitology; Tropical Medicine SC Parasitology; Tropical Medicine GA LE918 UT WOS:A1992LE91800074 PM 1343724 ER PT B AU GOTTESFELD, S URIBE, FA ARMES, SP AF GOTTESFELD, S URIBE, FA ARMES, SP BE Mittal, KL TI THE APPLICATION OF A POLYPYRROLE PRECOAT FOR THE METALLIZATION OF PRINTED-CIRCUIT BOARDS SO METALLIZED PLASTICS 3: FUNDAMENTAL AND APPLIED ASPECTS LA English DT Proceedings Paper CT 3RD SYMP ON METALLIZED PLASTICS CY OCT 13-18, 1991 CL PHOENIX, AZ SP ELECTROCHEM SOC DIELECT SCI & TECHNOL DIV RP GOTTESFELD, S (reprint author), LOS ALAMOS NATL LAB,ELECTR RES GRP,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA NEW YORK BN 0-306-44341-4 PY 1992 BP 3 EP 8 PG 6 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA BX36W UT WOS:A1992BX36W00001 ER PT B AU KING, DE CZANDERNA, AW SPAULDING, D AF KING, DE CZANDERNA, AW SPAULDING, D BE Mittal, KL TI INTERACTIONS OF DEPOSITED COPPER ON COOH OF 11-MERCAPTOUNDECANOIC ACID - AN XPS STUDY SO METALLIZED PLASTICS 3: FUNDAMENTAL AND APPLIED ASPECTS LA English DT Proceedings Paper CT 3RD SYMP ON METALLIZED PLASTICS CY OCT 13-18, 1991 CL PHOENIX, AZ SP ELECTROCHEM SOC DIELECT SCI & TECHNOL DIV RP KING, DE (reprint author), NATL RENEWABLE ENERGY LAB,APPL SCI BRANCH,GOLDEN,CO 80401, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA NEW YORK BN 0-306-44341-4 PY 1992 BP 149 EP 161 PG 13 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA BX36W UT WOS:A1992BX36W00013 ER PT J AU MARGOLIS, SB AF MARGOLIS, SB TI THE ASYMPTOTIC THEORY OF GASLESS COMBUSTION SYNTHESIS SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT SYMP AT THE 1991 ANNUAL MEETING OF THE MINERALS, METALS AND MATERIALS SOC : REACTION SYNTHESIS OF MATERIALS CY FEB 17-21, 1991 CL NEW ORLEANS, LA SP MINERALS MET & MAT SOC, POWDER MET COMM ID CONDENSED PHASE COMBUSTION; INTERMETALLIC REACTION-RATES; SEQUENTIAL REACTION; SPIN COMBUSTION; REACTION FRONT; PROPAGATION; FLAME; BIFURCATION; STABILITY; SYSTEMS AB The gasless, self-propagating, high-temperature synthesis of refractory materials is generally associated with a thin reaction zone that propagates through the material, converting the unburned reactant powders into a product alloy. The reactions themselves are characterized by large overall activation energies, a fact that can be exploited to derive asymptotic models in which the reaction zone becomes an infinitesimally thin sheet. Such models have been derived for both kinetically and diffusion-limited reactions, as well as for the intermediate case in which both chemical reaction and mass diffusion occur on comparable time scales. These models are amendable to analytical analysis, yielding formulas for the propagation speed of a steady, planar combustion wave and, in agreement with experiments, predicting critical parameter values above which stability is lost to one or more nonsteady modes of burning. In particular, nonlinear stability analyses have demonstrated the transition from steady to various periodic, quasi-periodic, and even chaotic combustion modes as a parameter related to the activation energy increases beyond the neutral stability threshold. RP MARGOLIS, SB (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,TECH STAFF,LIVERMORE,CA 94551, USA. NR 39 TC 12 Z9 13 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD JAN PY 1992 VL 23 IS 1 BP 15 EP 22 DI 10.1007/BF02660846 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA HB948 UT WOS:A1992HB94800003 ER PT J AU LAKSHMIKANTHA, MG BHATTACHARYA, A SEKHAR, JA AF LAKSHMIKANTHA, MG BHATTACHARYA, A SEKHAR, JA TI NUMERICAL MODELING OF SOLIDIFICATION COMBUSTION SYNTHESIS SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT SYMP AT THE 1991 ANNUAL MEETING OF THE MINERALS, METALS AND MATERIALS SOC : REACTION SYNTHESIS OF MATERIALS CY FEB 17-21, 1991 CL NEW ORLEANS, LA SP MINERALS MET & MAT SOC, POWDER MET COMM ID TINI INTERMETALLIC COMPOUNDS; TEMPERATURE; COMPOSITES; ALLOYS; HEAT; SHS AB A numerical study of self-propagating combustion synthesis is carried out to determine the effect of the heat of reaction (Q), the activation energy (E), the frequency factor (K0), thermal conductivity (K*), and initial temperature (T0) on the combustion velocity and combustion temperature in the presence of cooling at one end. The numerical procedure allows for the formation and solidification of nonstoichiometric combustion products. This includes the phase change of the product through its solidification and eutectic range. Calculations are carried out for the Ti-C system with an objective of predicting solutions which are comparable to previously reported, experimentally determined values. Calculations are also compared with the thin zone analytical solution to the combustion problem. The use of low K0 values to bring the solutions close to the experimentally determined numbers is discussed. Solutions are presented to elucidate the effect of relevant parameters on the thickness of the combustion and preheat zones. Conditions where extinction is expected to occur are identified. The effect of the thermal conductivity on the velocity may be to increase or decrease the velocity, depending on the value of K0. At low K0 values, an increase in the thermal conductivity may lead to a decrease in the combustion velocity. The effect of the initial temperature on the combustion velocity and temperature is to increase both; however, the increase in the combustion temperature may not be proportional to the increase in the initial temperature. The activation energy E has a pronounced effect on reducing the combustion velocity while not influencing the combustion temperature. The time rate of the solidification process which determines the final microstructure is discussed. C1 UNIV CINCINNATI,DEPT MAT SCI & ENGN,CINCINNATI,OH 45221. UNIV CINCINNATI,CTR MICROPYRET,CINCINNATI,OH 45221. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP LAKSHMIKANTHA, MG (reprint author), UNIV CINCINNATI,DEPT MATH,CINCINNATI,OH 45221, USA. NR 32 TC 57 Z9 59 U1 0 U2 4 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD JAN PY 1992 VL 23 IS 1 BP 23 EP 34 DI 10.1007/BF02660847 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA HB948 UT WOS:A1992HB94800004 ER PT J AU RABIN, BH WRIGHT, RN AF RABIN, BH WRIGHT, RN TI MICROSTRUCTURE AND TENSILE PROPERTIES OF FE3AL PRODUCED BY COMBUSTION SYNTHESIS HOT ISOSTATIC PRESSING SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT SYMP AT THE 1991 ANNUAL MEETING OF THE MINERALS, METALS AND MATERIALS SOC : REACTION SYNTHESIS OF MATERIALS CY FEB 17-21, 1991 CL NEW ORLEANS, LA SP MINERALS MET & MAT SOC, POWDER MET COMM ID IRON-ALUMINUM; ADDITIONS; B2 AB Combustion synthesis was carried out in a hot isostatic press (HIP) in order to prepare near-theoretical density Fe3Al and Fe3Al -1 Cr alloys from elemental powder mixtures. The microstructures and room-temperature tensile properties of these materials were studied in the as-synthesized condition and after heat treatment. As-synthesized materials exhibit a fine, equiaxed grain structure with grain sizes typically less than 10-mu-m. Yield and ultimate tensile strengths were found to be significantly higher than what has been reported for conventionally processed materials having similar composition. Although lower ductility was generally observed, elongations exceeding 5 pct were obtained in heat-treated Cr-containing alloys. Fracture occurred predominantly by transgranular cleavage. The strengthening of these materials is attributed to the fine grain size resulting from combustion synthesis/HIP processing. Transmission electron microscopy (TEM) revealed the presence of two distinct populations of aluminum oxide particles in the material. Nanometer-sized oxides exist within grains that likely formed at prior iron particle boundaries, and a high density of larger oxides exist along grain boundaries that probably originated from surface oxides on the aluminum powder. The presence of the grain boundary oxides was qualitatively observed to provide resistance to grain growth. RP RABIN, BH (reprint author), IDAHO NATL ENGN LAB,MAT TECHNOL GRP,IDAHO FALLS,ID 83415, USA. NR 10 TC 43 Z9 44 U1 0 U2 5 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD JAN PY 1992 VL 23 IS 1 BP 35 EP 40 DI 10.1007/BF02660848 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA HB948 UT WOS:A1992HB94800005 ER PT J AU HOKE, DA MEYERS, MA MEYER, LW GRAY, GT AF HOKE, DA MEYERS, MA MEYER, LW GRAY, GT TI REACTION SYNTHESIS DYNAMIC COMPACTION OF TITANIUM DIBORIDE SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT SYMP AT THE 1991 ANNUAL MEETING OF THE MINERALS, METALS AND MATERIALS SOC : REACTION SYNTHESIS OF MATERIALS CY FEB 17-21, 1991 CL NEW ORLEANS, LA SP MINERALS MET & MAT SOC, POWDER MET COMM ID COMBUSTION SYNTHESIS; COMPRESSION; FAILURE AB A new method for producing dense compacts of titanium diboride is described. This approach combines reaction synthesis with a high velocity forging step (5 to 15 m/s impact velocity) to achieve densification and near-net shape. By combining synthesis and densification, titanium diboride disks with over 96 pct of the theoretical density were produced. The highly exothermic (279.6 to 324.0 kJ/mol) synthesis reaction between titanium and boron produces temperatures of approximately 3000 K, at which the material is ductile and forgeable in a high-speed machine. The mechanical properties (quasi-static and dynamic) of reaction-synthesized/dynamically compacted titanium diboride are determined and compared with that of conventionally hot-pressed material. C1 FRAUNHOFER INST ANGEW MAT FORSCH,W-2820 BREMEN 77,GERMANY. UNIV CALIF LOS ALAMOS SCI LAB,TECH STAFF,LOS ALAMOS,NM 87545. RP HOKE, DA (reprint author), UNIV CALIF SAN DIEGO,MAT SCI,LA JOLLA,CA 92093, USA. RI Meyers, Marc/A-2970-2016 OI Meyers, Marc/0000-0003-1698-5396 NR 21 TC 38 Z9 38 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD JAN PY 1992 VL 23 IS 1 BP 77 EP 86 DI 10.1007/BF02660855 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA HB948 UT WOS:A1992HB94800012 ER PT J AU VECCHIO, KS LASALVIA, JC MEYERS, MA GRAY, GT AF VECCHIO, KS LASALVIA, JC MEYERS, MA GRAY, GT TI MICROSTRUCTURAL CHARACTERIZATION OF SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS DYNAMICALLY COMPACTED AND HOT-PRESSED TITANIUM CARBIDES SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT SYMP AT THE 1991 ANNUAL MEETING OF THE MINERALS, METALS AND MATERIALS SOC : REACTION SYNTHESIS OF MATERIALS CY FEB 17-21, 1991 CL NEW ORLEANS, LA SP MINERALS MET & MAT SOC, POWDER MET COMM ID BEHAVIOR AB Titanium-Carbide produced by combustion synthesis followed by rapid densification in a high-speed forging machine was characterized by optical microscopy, scanning electron microscopy, and transmission electron microscopy (TEM). The density of the combustion synthesized/dynamically compacted TiC reached values greater than 96 pct of theoretical density, based on TiC0.9, while commercially produced hot-pressed TiC typically exceeded 99 pct of theoretical density. The higher density of the hot-pressed TiC was found to be attributable to a large volume fraction of heavy element containing inclusions. The microstructure of both TiCs consists of equiaxed TiC grains with some porosity located both at grain boundaries and within the grain interiors. In both cases, self-propagating high-temperature synthesis (SHS)/dynamically compacted (DC) and hot-pressed, the TiC is ordered cubic (NaCl-structure, B1; Space Group Fm3m) with a lattice parameter of almost-equal-to 0.4310 nm, indicative of a slightly carbon deficient structure; stoichiometric TiC has a lattice parameter of 0.4320 nm. For the most part, the grains were free of dislocations, although some dislocation dipoles were found associated with the voids within the grain interiors. In one SHS/DC specimen, a new, complex Ti-Al-O(C) phase was observed. The structure could not be matched with any previously published phases but is believed to be hexagonal, with a c-axis/a-axis ratio of almost-equal-to 6.6, similar to the AlCTi2 phase which has a point group 6 mmm. In all other SHS/DC TiC samples, the grains and grain boundaries were devoid of any second-phase particles. The hot-pressed TiC exhibited a greater degree of porosity than the SHS/densified specimens and a large concentration of second-phase particles at grain boundaries and within grains. The structure and composition of these second-phase particles were determined by convergent beam electron diffraction (CBED) and X-ray microanalysis. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP VECCHIO, KS (reprint author), UNIV CALIF SAN DIEGO,DEPT AMES,LA JOLLA,CA 92093, USA. RI Vecchio, Kenneth/F-6300-2011; Meyers, Marc/A-2970-2016 OI Vecchio, Kenneth/0000-0003-0217-6803; Meyers, Marc/0000-0003-1698-5396 NR 15 TC 27 Z9 29 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD JAN PY 1992 VL 23 IS 1 BP 87 EP 97 DI 10.1007/BF02660856 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA HB948 UT WOS:A1992HB94800013 ER PT J AU SEIBERT, M PICOREL, R KIM, JH COTTON, TM AF SEIBERT, M PICOREL, R KIM, JH COTTON, TM TI SURFACE-ENHANCED RAMAN-SCATTERING SPECTROSCOPY OF PHOTOSYNTHETIC MEMBRANES AND COMPLEXES SO METHODS IN ENZYMOLOGY LA English DT Review ID PHOTOSYSTEM-II MEMBRANES; RESONANCE RAMAN; SILVER ELECTRODE; BACTERIAL; MANGANESE; SPECTRA C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,DEPT CHEM,AMES,IA 50011. ESTAC EXPTL AVLA DEI,DEPT PLANT NUTR,E-50080 ZARAGOZA,SPAIN. RP SEIBERT, M (reprint author), NATL RENEWABLE ENERGY LAB,PHOTOCONVERS BRANCH,GOLDEN,CO 80401, USA. RI PICOREL, RAFAEL/K-7930-2014 OI PICOREL, RAFAEL/0000-0003-3791-129X FU NIGMS NIH HHS [GM-35108] NR 21 TC 14 Z9 14 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 213 BP 31 EP 42 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KL576 UT WOS:A1992KL57600004 PM 1435308 ER PT J AU GRAY, DM RATLIFF, RL VAUGHAN, MR AF GRAY, DM RATLIFF, RL VAUGHAN, MR TI CIRCULAR-DICHROISM SPECTROSCOPY OF DNA SO METHODS IN ENZYMOLOGY LA English DT Review ID C.C+ BASE-PAIRS; ACID BUTYLAMINE COMPLEXES; X-RAY-DIFFRACTION; CONFORMATIONAL CHARACTERISTICS; ABSORPTION-SPECTROSCOPY; ETHANOLIC SOLUTIONS; INDUCED TRANSITION; NUCLEIC-ACID; CD SPECTRA; A.T C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RP GRAY, DM (reprint author), UNIV TEXAS,PROGRAM MOLEC & CELL BIOL,RICHARDSON,TX 75083, USA. FU NCRR NIH HHS [SO7 RR 07133]; NIGMS NIH HHS [GM19060] NR 54 TC 209 Z9 211 U1 1 U2 41 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 211 BP 389 EP 406 PG 18 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JM559 UT WOS:A1992JM55900019 PM 1406317 ER PT J AU SNYDER, F AF SNYDER, F TI ALKYLGLYCEROL PHOSPHOTRANSFERASE SO METHODS IN ENZYMOLOGY LA English DT Review ID PLASMALOGENS RP SNYDER, F (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831, USA. FU NCI NIH HHS [CA-41642-05]; PHS HHS [27109-10] NR 19 TC 7 Z9 8 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 211 EP 215 PG 5 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400023 PM 1323034 ER PT J AU SNYDER, F LEE, TC AF SNYDER, F LEE, TC TI 1-ALKYL-2-ACETYL-SN-GLYCERO-3-PHOSPHATE PHOSPHATASE SO METHODS IN ENZYMOLOGY LA English DT Review ID PLATELET-ACTIVATING FACTOR; PERFORMANCE LIQUID-CHROMATOGRAPHY; DERIVATIVES; SEPARATION; SUBCLASSES; BENZOATES; PATHWAY; CELLS; ETHER RP SNYDER, F (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831, USA. FU PHS HHS [35495-04A1] NR 13 TC 4 Z9 4 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 230 EP 234 PG 5 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400026 PM 1323036 ER PT J AU LEE, TC SNYDER, F AF LEE, TC SNYDER, F TI 1-ALKYL-2-ACETYL-SN-GLYCEROL CHOLINEPHOSPHOTRANSFERASE SO METHODS IN ENZYMOLOGY LA English DT Review ID PLATELET-ACTIVATING FACTOR; DENOVO BIOSYNTHESIS; INNER MEDULLA; CELLS; PATHWAY; INVOLVEMENT; RETINA RP LEE, TC (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831, USA. FU PHS HHS [35495-04A1] NR 16 TC 5 Z9 6 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 279 EP 283 PG 5 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400033 PM 1323043 ER PT J AU BROWN, A SNYDER, F AF BROWN, A SNYDER, F TI ALKYLDIHYDROXYACETONEPHOSPHATE SYNTHASE SO METHODS IN ENZYMOLOGY LA English DT Review ID DIHYDROXYACETONE PHOSPHATE; ETHER BOND; MECHANISM; SPECIFICITY C1 OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831. RP BROWN, A (reprint author), WASHINGTON UNIV,SCH MED,DIV RENAL,ST LOUIS,MO 63110, USA. FU NCI NIH HHS [CA-41642-05]; PHS HHS [27109-10] NR 30 TC 8 Z9 8 U1 1 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 377 EP 384 PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400044 PM 1495418 ER PT J AU BLANK, ML SNYDER, F AF BLANK, ML SNYDER, F TI PLASMANYLETHANOLAMINE DELTA-1-DESATURASE SO METHODS IN ENZYMOLOGY LA English DT Review ID PERFORMANCE LIQUID-CHROMATOGRAPHY; CANINE KIDNEY-CELLS; ETHANOLAMINE PLASMALOGENS; ARACHIDONIC-ACID; HUMAN-PLATELETS; BIOSYNTHESIS; PHOSPHOLIPIDS; DESATURATION C1 OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831. RP BLANK, ML (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831, USA. FU NCI NIH HHS [CA-41642-05]; PHS HHS [27109-10] NR 33 TC 2 Z9 2 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 390 EP 396 PG 7 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400046 PM 1495420 ER PT J AU LEE, TC VALLARI, DS SNYDER, F AF LEE, TC VALLARI, DS SNYDER, F TI 1-ALKYL-2-LYSO-SN-GLYCERO-3-PHOSPHOCHOLINE ACETYLTRANSFERASE SO METHODS IN ENZYMOLOGY LA English DT Review ID PLATELET-ACTIVATING-FACTOR; RAT SPLEEN MICROSOMES; ACETYL-COA ACETYLTRANSFERASE; LYSO-PAF-ACETYLTRANSFERASE; HUMAN-NEUTROPHILS; BIOSYNTHESIS; PHOSPHORYLATION; ACETHER; MODULATION C1 ABBOTT LABS,N CHICAGO,IL 60064. RP LEE, TC (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831, USA. FU NCI NIH HHS [CA-41642-05]; PHS HHS [27109-10] NR 24 TC 13 Z9 13 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 396 EP 401 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400047 PM 1495421 ER PT J AU SNYDER, F LEE, TC MALONE, B AF SNYDER, F LEE, TC MALONE, B TI 1-ALKYL-2-LYSO-SN-GLYCERO-3-PHOSPHATE ACETYLTRANSFERASE SO METHODS IN ENZYMOLOGY LA English DT Review ID PLATELET-ACTIVATING FACTOR; RABBIT PLATELETS; DENOVO PATHWAY; RAT SPLEEN; BIOSYNTHESIS; CELLS; 1-ALKYL-2-ACETYL-SN-GLYCEROLS RP SNYDER, F (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,DEPT BIOL CHEM,OAK RIDGE,TN 37831, USA. FU PHS HHS [35495-04A1] NR 16 TC 5 Z9 5 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0076-6879 J9 METHOD ENZYMOL JI Method Enzymol. PY 1992 VL 209 BP 407 EP 412 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA JB764 UT WOS:A1992JB76400049 PM 1323050 ER PT J AU LEFF, LG MCARTHUR, JV SHIMKETS, LJ AF LEFF, LG MCARTHUR, JV SHIMKETS, LJ TI INFORMATION SPIRALING - MOVEMENT OF BACTERIA AND THEIR GENES IN STREAMS SO MICROBIAL ECOLOGY LA English DT Article ID PROTOZOAN TETRAHYMENA-PYRIFORMIS; ESCHERICHIA-COLI; PSEUDOMONAS-FLUORESCENS; BLACKWATER RIVER; DIVISION CYCLE; ORGANIC-CARBON; DNA; BIOFILMS; ADHESION; SURFACES AB Bacteria in transport in streams are largely derived from other parts of the ecosystem. Here we review factors that influence transport of bacteria and their movement between habitats (such as sediment, water column, rocks, wood, and leaves) and consider the role of these movements in ecosystem processes. Bacteria enter the water column by sloughing, scouring, as a consequence of changes in morphology or hydrophobicity, or dislodgment by invertebrates and fish or other aquatic vertebrates. Transported cells (which may be planktonic or particle-associated) that colonize surfaces may establish new gene pools through cell division (vertical transfer) or genetic exchange (lateral transfer). Genetic information is also transported in streams as free or protected DNA or in bacteriophages. Movement of these vectors causes genetic information to spiral along a stream in a manner analogous to that of nutrients and organic carbon. Spiraling refers to the pattern of transport, uptake or attachment, and release of a molecule or cell. The flow of water in streams causes this cycle of attachment and release to be displaced downstream resulting in a spiral rather than a closed, stationary loop. C1 UNIV GEORGIA,DEPT MICROBIOL,ATHENS,GA 30602. SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. RP LEFF, LG (reprint author), UNIV GEORGIA,INST ECOL,ATHENS,GA 30602, USA. NR 72 TC 28 Z9 28 U1 2 U2 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0095-3628 J9 MICROBIAL ECOL JI Microb. Ecol. PY 1992 VL 24 IS 1 BP 11 EP 24 PG 14 WC Ecology; Marine & Freshwater Biology; Microbiology SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology GA JK459 UT WOS:A1992JK45900002 PM 24193036 ER PT J AU PHAM, H AF PHAM, H TI OPTIMAL-DESIGN OF K-OUT-OF-N REDUNDANT-SYSTEMS SO MICROELECTRONICS AND RELIABILITY LA English DT Article AB A k-out-of-n system is one in which at least k out of n units are to function for the successful operation of the system. Examples of such systems are found in communication, multiprocessor and transportation systems. A k-out-of-n system is very general and includes the parallel, series, N-Modular Redundancy (NMR). and fail safe systems as special cases. In this paper, the optimization problems are formulated and solved for the minimum expected total cost of k-out-of-n systems. Some numerical examples are given to illustrate the results. RP PHAM, H (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 7 TC 8 Z9 9 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0026-2714 J9 MICROELECTRON RELIAB JI Microelectron. Reliab. PD JAN-FEB PY 1992 VL 32 IS 1-2 BP 119 EP 126 DI 10.1016/0026-2714(92)90091-X PG 8 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA GY445 UT WOS:A1992GY44500013 ER PT J AU DAI, S YOUNG, JP BEGUN, GM COFFIELD, JE MAMANTOV, G AF DAI, S YOUNG, JP BEGUN, GM COFFIELD, JE MAMANTOV, G TI MEASUREMENT OF MOLTEN-SALT RAMAN-SPECTRA BY THE USE OF FIBER OPTICS SO MIKROCHIMICA ACTA LA English DT Article DE RAMAN SPECTROSCOPY; FIBEROPTIC PROBE; MOLTEN SALTS ID SPECTROSCOPY; LASER; MELTS; CELL AB A novel all-silica fiberoptic probe is described. Instead of cementing individual optical fibers together, the fibers are fused together within a silica tube. This all-silica probe has been used for obtaining Raman spectra of various molten salt systems at temperatures up to 720-degrees-C. It has also been used for Raman spectral studies of samples at ambient temperatures. C1 OAK RIDGE NATL LAB, DIV ANALYT CHEM, OAK RIDGE, TN 37831 USA. UNIV TENNESSEE, DEPT CHEM, KNOXVILLE, TN 37996 USA. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 15 TC 16 Z9 16 U1 0 U2 2 PU SPRINGER WIEN PI WIEN PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA SN 0026-3672 J9 MIKROCHIM ACTA JI Mikrochim. Acta PY 1992 VL 108 IS 3-6 BP 261 EP 264 DI 10.1007/BF01242435 PG 4 WC Chemistry, Analytical SC Chemistry GA JR027 UT WOS:A1992JR02700015 ER PT J AU CHENG, JL XENOPOULOS, A WUNDERLICH, B AF CHENG, JL XENOPOULOS, A WUNDERLICH, B TI MESOPHASES OF ALKYLAMMONIUM SALTS .2. DISORDER AND MOTION IN THE LOW HOMOLOGS - [CH3(CH2)N-1]NX, N = 1, 2, 3 AND X = BR AND I ANALYZED BY SOLID-STATE C-13 NMR SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article DE TETRA-N-ALKYLAMMONIUM BROMIDES AND IODIDES; DISORDER AND MOTION; PLASTIC CRYSTAL; SOLID STATE C-13 NMR; THERMAL ANALYSIS ID MAGIC-ANGLE; SPECTRA; RESOLUTION; N-14 AB Disorder and motion in crystals of tetra-n-alkylammonium halides of short chain length alkyl groups, [CH3(CH2)n-1]4NX, where n = 1, 2, 3 and X = Br and I, have been analyzed based on solid state NMR. The solid-mesophase phase transitions involve orientational motion and disorder of the cation as a whole, so that the mesophases must be identified as plastic crystals. Except for the methyl rotation, the conformational motion, i.e., the rotation about single-bonds, is limited to small-angle librations that do not reach other conformational isomers. The analyzed salts show, thus, a plastic-crystal mesophase without conformational disorder. The information on the disorder and motion, obtained initially by thermal analysis of the transition, agrees well with the more detailed NMR results. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP CHENG, JL (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 26 TC 14 Z9 14 U1 0 U2 5 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0140-6566 J9 MOL CRYST LIQ CRYST PY 1992 VL 220 BP 105 EP 125 DI 10.1080/10587259208033434 PG 21 WC Crystallography SC Crystallography GA JJ180 UT WOS:A1992JJ18000011 ER PT J AU CHENG, JL XENOPOULOS, A WUNDERLICH, B AF CHENG, JL XENOPOULOS, A WUNDERLICH, B TI MESOPHASES OF ALKYLAMMONIUM SALTS .3. DISORDER AND MOTION IN THE INTERMEDIATE HOMOLOGS - [CH3(CH2)N-1]4NX, N = 4, 5, 6, 7 AND X = BR AND I SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article DE TETRA-N-ALKYLAMMONIUM BROMIDES AND IODIDES; DISORDER AND MOTION; PLASTIC CRYSTAL; CONDIS CRYSTAL; SOLID STATE C-13 NMR; THERMAL ANALYSIS AB Disorder and motion in crystals and mesophases of tetra-n-alkylammonium halides of intermediate chain length alkyl groups, [CH3(CH2)n-1]4NX, where n = 4, 5, 6, 7 and X = Br and I, have been analyzed based on entropy changes of phase transitions known from differential scanning calorimetry (DSC) and new measurements of solid state C-13 nuclear magnetic resonance spectra (NMR). Some mesophase transitions from the crystal state involve only conformational motion and disordering to lead to condis crystals. The conformational motion and disordering in the alkyl chains may also be introduced gradually (transitionless change to a condis crystals). Further heating of the samples increases the degree of conformational disorder (entropy) to reach different, more disordered condis states, or causes orientational motion and disorder of the cation as a whole to form plastic crystals, which in this intermediate alkyl chain-length group of salts contain always conformational disorder. Finally, isotropization occurs either directly from the condis state or out of the plastic crystal. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP CHENG, JL (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 20 TC 14 Z9 14 U1 0 U2 3 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0140-6566 J9 MOL CRYST LIQ CRYST PY 1992 VL 220 BP 127 EP 157 DI 10.1080/10587259208033435 PG 31 WC Crystallography SC Crystallography GA JJ180 UT WOS:A1992JJ18000012 ER PT J AU BISHOP, AR BATISTIC, I GAMMEL, JT SAXENA, A AF BISHOP, AR BATISTIC, I GAMMEL, JT SAXENA, A TI AN EXTENDED PEIERLS-HUBBARD MODEL OF HALOGEN-BRIDGED TRANSITION-METAL CHAIN COMPLEXES SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article ID PLATINUM RP BISHOP, AR (reprint author), LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1542-1406 J9 MOL CRYST LIQ CRYST JI Mol. Cryst. Liquid Cryst. PY 1992 VL 216-18 BP 241 EP 245 PG 5 WC Crystallography SC Crystallography GA JD127 UT WOS:A1992JD12700132 ER PT J AU XENOPOULOS, A CHENG, J YASUNIWA, M WUNDERLICH, B AF XENOPOULOS, A CHENG, J YASUNIWA, M WUNDERLICH, B TI MESOPHASES OF ALKYLAMMONIUM SALTS .1. 1ST-ORDER TRANSITIONS SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article ID CONDIS CRYSTALS; SMALL MOLECULES C1 OAK RIDGE NATL LAB,DEPT CHEM,OAK RIDGE,TN 37830. FUKUOKA UNIV,FAC SCI,DEPT APPL PHYS,JONAN KU,FUKUOKA 814,JAPAN. RP XENOPOULOS, A (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 32 TC 33 Z9 33 U1 1 U2 8 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0140-6566 J9 MOL CRYST LIQ CRYST PY 1992 VL 214 BP 63 EP 79 DI 10.1080/10587259208037282 PG 17 WC Crystallography SC Crystallography GA JD126 UT WOS:A1992JD12600006 ER PT J AU CHENG, JL JIN, YM LIANG, GH WUNDERLICH, B WIEDEMANN, HG AF CHENG, JL JIN, YM LIANG, GH WUNDERLICH, B WIEDEMANN, HG TI CONDIS CRYSTALS OF SMALL MOLECULES .5. SOLID-STATE C-13 NMR AND THERMAL-PROPERTIES OF N,N'-BIS(4-NORMAL-OCTYLOXYBENZAL)-1,4-PHENYLENEDIAMINE (OOBPD) SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article DE N,N'-BIS(4-NORMAL-OCTYLOXYBENZAL)-1,4-PHENYLENEDIAMINE (OOBPD); CONDIS STATE; LIQUID CRYSTAL; CONFORMATIONAL MOTION; SOLID STATE NMR; GAMMA-GAUCHE EFFECT OF C-13; NUCLEAR SPIN-LATTICE RELAXATION; DSC; HEAT CAPACITY; ENTROPY ID POLYMERS; RESOLUTION; MOTION C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. METTLER TOLEDO INSTRUMENTE AG,CH-8606 GREIFENSEE ZH,SWITZERLAND. RP CHENG, JL (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 35 TC 26 Z9 26 U1 0 U2 2 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0140-6566 J9 MOL CRYST LIQ CRYST PY 1992 VL 213 BP 237 EP 258 DI 10.1080/10587259208028735 PG 22 WC Crystallography SC Crystallography GA JC167 UT WOS:A1992JC16700024 ER PT J AU HARTZELL, CJ HSU, ML BUSCHER, CT MORRIS, DE ELLER, PG AF HARTZELL, CJ HSU, ML BUSCHER, CT MORRIS, DE ELLER, PG TI LANTHANIDE RELAXATION AND SHIFT PROPERTIES AS NMR PROBES FOR THE LOCATION OF TRIBUTYLPHOSPHATE IN CLAYS SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON THE CHEMISTRY OF THE ORGANIC SOLID STATE ( ICCOSS 10 ) CY JUL 07-12, 1991 CL UNIV BRITISH COLUMBIA, VANCOUVER, CANADA SP CHEM INST CANADA, INT CONF CHEM ORGANIC SOLID STATE 9, NAT SCI & ENGN RES COUNCIL CANADA, PETR RES FUND, UNIV BRIT COLUMBIA, BRUKER SPECTROSPIN CANADA, DOTY SCI, CHEMAGNETICS HO UNIV BRITISH COLUMBIA DE TRIBUTYLPHOSPHATE; CPMAS OF TRIBUTYLPHOSPHATE; EUROPIUM SHIFT EFFECTS; CLAYS; MONTMORILLONITE; NMR ID PROTON C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP HARTZELL, CJ (reprint author), NO ARIZONA UNIV,DEPT CHEM,FLAGSTAFF,AZ 86011, USA. RI Morris, David/A-8577-2012 NR 7 TC 1 Z9 1 U1 0 U2 1 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0140-6566 J9 MOL CRYST LIQ CRYST PY 1992 VL 211 BP 227 EP 232 DI 10.1080/10587259208025823 PG 6 WC Crystallography SC Crystallography GA JB576 UT WOS:A1992JB57600025 ER PT J AU MONTGOMERY, LK BURGIN, T HUSTING, C TILLEY, L HUFFMAN, JC CARLSON, KD DUDEK, JD YACONI, GA GEISER, U WILLIAMS, JM AF MONTGOMERY, LK BURGIN, T HUSTING, C TILLEY, L HUFFMAN, JC CARLSON, KD DUDEK, JD YACONI, GA GEISER, U WILLIAMS, JM TI SYNTHESIS AND CHARACTERIZATION OF RADICAL CATION SALTS DERIVED FROM TETRASELENAFULVALENE AND BIS(ETHYLENEDITHIO)TETRASELENAFULVALENE SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON THE CHEMISTRY OF THE ORGANIC SOLID STATE ( ICCOSS 10 ) CY JUL 07-12, 1991 CL UNIV BRITISH COLUMBIA, VANCOUVER, CANADA SP CHEM INST CANADA, INT CONF CHEM ORGANIC SOLID STATE 9, NAT SCI & ENGN RES COUNCIL CANADA, PETR RES FUND, UNIV BRIT COLUMBIA, BRUKER SPECTROSPIN CANADA, DOTY SCI, CHEMAGNETICS HO UNIV BRITISH COLUMBIA DE ORGANIC SUPERCONDUCTORS; BIS(ETHYLENEDITHIO)TETRASELENAFULVALENE; TETRASELENAFULVALENE ID PRESSURE ORGANIC SUPERCONDUCTOR; BEDT-TTF; TSEF C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP MONTGOMERY, LK (reprint author), INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405, USA. NR 21 TC 14 Z9 14 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0140-6566 J9 MOL CRYST LIQ CRYST PY 1992 VL 211 BP 283 EP 288 DI 10.1080/10587259208025827 PG 6 WC Crystallography SC Crystallography GA JB576 UT WOS:A1992JB57600029 ER PT J AU PHILLPOT, SR RICKMAN, JM AF PHILLPOT, SR RICKMAN, JM TI TEMPERATURE-DEPENDENCE OF THE THERMODYNAMIC PROPERTIES OF A LIQUID OVER A WIDE-RANGE OF TEMPERATURES FROM SIMULATIONS AT A SINGLE TEMPERATURE SO MOLECULAR PHYSICS LA English DT Article ID CARLO AB The temperature dependence of the zero-pressure enthalpy, density and reduced free energy of a Lennard-Jones liquid are accurately and precisely calculated as a function of temperature by analysing the cumulants of the enthalpy distribution function obtained in a single Monte Carlo simulation at one temperature. RP ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. RI Phillpot, Simon/J-9117-2012; OI Phillpot, Simon/0000-0002-7774-6535 NR 11 TC 3 Z9 3 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 0026-8976 EI 1362-3028 J9 MOL PHYS JI Mol. Phys. PD JAN PY 1992 VL 75 IS 1 BP 189 EP 195 DI 10.1080/00268979200100141 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HB102 UT WOS:A1992HB10200014 ER PT J AU NATARAJAN, AT VERMEULEN, S DARROUDI, F VALENTINE, MB BRENT, TP MITRA, S TANO, K AF NATARAJAN, AT VERMEULEN, S DARROUDI, F VALENTINE, MB BRENT, TP MITRA, S TANO, K TI CHROMOSOMAL LOCALIZATION OF HUMAN O-6-METHYLGUANINE-DNA METHYLTRANSFERASE (MGMT) GENE BY INSITU HYBRIDIZATION SO MUTAGENESIS LA English DT Note ID ESCHERICHIA-COLI; DNA; EXPRESSION; CARCINOGENESIS; CLONING; REPAIR; AGENTS AB Recombinant lambda phage DNA containing segments of human O6-methylguanine-DNA transferase gene was employed to localize this gene among the human chromosomes using non-radioactive in situ hybridization technique. This gene was found to be present at the telomeric end, 26q, of the long arm of the chromosome 10. C1 ST JUDE CHILDRENS RES HOSP, MEMPHIS, TN 38101 USA. UNIV TENNESSEE, GRAD SCH BIOMED SCI, OAK RIDGE NATL LAB, DIV BIOL, OAK RIDGE, TN 37831 USA. RP NATARAJAN, AT (reprint author), LEIDEN UNIV, MGC DEPT RADIAT GENET & CHEM MUTAGENESIS, WASSENAARSEWEG 72, 2333 AL LEIDEN, NETHERLANDS. FU NCI NIH HHS [CA 14799, CA 21765, CA 36888] NR 15 TC 36 Z9 38 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0267-8357 J9 MUTAGENESIS JI Mutagenesis PD JAN PY 1992 VL 7 IS 1 BP 83 EP 85 DI 10.1093/mutage/7.1.83 PG 3 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA HA984 UT WOS:A1992HA98400014 PM 1635460 ER PT J AU MCFEE, AF TICE, RR SHELBY, MD AF MCFEE, AF TICE, RR SHELBY, MD TI INVIVO CYTOGENETIC ACTIVITY OF DIPHENYLHYDANTOIN IN MICE SO MUTATION RESEARCH LA English DT Article DE DIPHENYLHYDANTOIN; ANTICONVULSIVE; CHROMOSOME ABERRATIONS; SCE; MICRONUCLEI ID BONE-MARROW CELLS; POLYCHROMATIC ERYTHROCYTES; ANTICONVULSANT DRUGS; PERIPHERAL-BLOOD; PHENYTOIN; CHROMOSOMES; INDUCTION; KINETICS; FETAL; TIME AB Diphenylhydantoin was tested in vivo in mice using a variety of cytogenetic endpoints to evaluate its genotoxicity. Injected doses of 125, 250 and 500 mg/kg failed to increase the number of chromosome aberrations in marrow cells at 17 h post-treatment, and 37.5, 75 and 150 mg/kg doses were likewise ineffective at 36 h. SCEs were significantly increased by doses of 125 mg/kg (but not 250 mg) after 23 h and modestly, in relation to dose, at 42 h. No increase in the number of micronuclei among marrow PCEs was seen following single i.v. injections ranging from 0.1 to 20 mg/kg. Three daily i.p. injections of doses up to 70 mg/kg also failed to increase the number of micronuclei in either marrow or peripheral blood PCEs. Some cytotoxic effect was evident following relatively high doses. C1 INTEGRATED LAB SYST INC,RES TRIANGLE PK,NC. NIEHS,RES TRIANGLE PK,NC 27709. RP MCFEE, AF (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,POB 117,OAK RIDGE,TN 37831, USA. FU NCI NIH HHS [Y01-CP-10207]; NIEHS NIH HHS [Y01-ES-20100, N0 1-ES-85209] NR 31 TC 9 Z9 9 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD JAN PY 1992 VL 278 IS 1 BP 61 EP 68 DI 10.1016/0165-1218(92)90286-9 PG 8 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA GV880 UT WOS:A1992GV88000008 PM 1370120 ER PT J AU WOLPERT, DH AF WOLPERT, DH TI STACKED GENERALIZATION SO NEURAL NETWORKS LA English DT Article DE GENERALIZATION AND INDUCTION; COMBINING GENERALIZERS; LEARNING SET PREPROCESSING; CROSS-VALIDATION; ERROR ESTIMATION AND CORRECTION AB This paper introduces stacked generalization, a scheme for minimizing the generalization error rate of one or more generalizers. Stacked generalization works by deducing the biases of the generalizer(s) with respect to a provided learning set. This deduction proceeds by generalizing in a second space whose inputs are (for example) the guesses of the original generalizers when taught with part of the learning set and trying to guess the rest of it, and whose output is (for example) the correct guess. When used with multiple generalizers, stacked generalization can be seen as a more sophisticated version of cross-validation, exploiting a strategy more sophisticated than cross-validation's crude winner-takes-all for combining the individual generalizers. When used with a single generalizer, stacked generalization is a scheme for estimating (and then correcting for) the error of a generalizer which has been trained on a particular learning set and then asked a particular question. After introducing stacked generalization and justifying its use, this paper presents two numerical experiments. The first demonstrates how stacked generalization improves upon a set of separate generalizers for the NETtalk task of translating text to phonemes. The second demonstrates how stacked generalization improves the performance of a single surface-fitter. With the other experimental evidence in the literature, the usual arguments supporting cross-validation, and the abstract justifications presented in this paper, the conclusion is that for almost any real-world generalization problem one should use some version of stacked generalization to minimize the generalization error rate. This paper ends by discussing some of the variations of stacked generalization, and how it touches on other fields like chaos theory. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP WOLPERT, DH (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,COMPLEX SYST GRP,MS B213,LOS ALAMOS,NM 87545, USA. NR 29 TC 1510 Z9 1561 U1 5 U2 33 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0893-6080 J9 NEURAL NETWORKS JI Neural Netw. PY 1992 VL 5 IS 2 BP 241 EP 259 DI 10.1016/S0893-6080(05)80023-1 PG 19 WC Computer Science, Artificial Intelligence SC Computer Science GA HL214 UT WOS:A1992HL21400005 ER PT B AU DEBRUIJN, FJ CHEN, R DEHIO, C GOEL, A REISER, S SZCZYGLOWSKI, K AF DEBRUIJN, FJ CHEN, R DEHIO, C GOEL, A REISER, S SZCZYGLOWSKI, K BE Khush, GS Bennett, J TI HORMONES AND NODULE FORMATION - CYTOKININ INDUCTION OF THE SESBANIA-ROSTRATA EARLY NODULIN GENE ENOD2 SO NODULATION AND NITROGEN FIXATION IN RICE: POTENTIAL AND PROSPECTS LA English DT Proceedings Paper CT International Workshop to Access the Potential for Nodulation and Nitrogen Fixation in Rice CY FEB 24-27, 1992 CL INT RICE RICE INST, MANILA, PHILIPPINES SP INT RICE RES INST HO INT RICE RICE INST RP DEBRUIJN, FJ (reprint author), MICHIGAN STATE UNIV,DOE PLANT RES LAB,E LANSING,MI 48824, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU INT RICE RESEARCH INST PI MANILA PA PO BOX 933, MANILA, PHILIPPINES BN 971-22-0035-3 PY 1992 BP 33 EP 40 PG 8 WC Agronomy SC Agriculture GA BZ42H UT WOS:A1992BZ42H00005 ER PT J AU WILSON, GE BOYACK, BE CATTON, I DUFFEY, RB GRIFFITH, P KATSMA, KR LELLOUCHE, GS LEVY, S ROHATGI, US WULFF, W ZUBER, N AF WILSON, GE BOYACK, BE CATTON, I DUFFEY, RB GRIFFITH, P KATSMA, KR LELLOUCHE, GS LEVY, S ROHATGI, US WULFF, W ZUBER, N TI TPG RESPONSE TO THE FORGOING LETTERS-TO-THE-EDITOR SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. S LEVY INC,CAMPBELL,CA 95008. MIT,CAMBRIDGE,MA 02139. US NUCL REGULATORY COMMISS,ROCKVILLE,MD 20852. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP WILSON, GE (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 5 TC 5 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD JAN PY 1992 VL 132 IS 3 BP 431 EP 436 DI 10.1016/0029-5493(92)90243-O PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HM627 UT WOS:A1992HM62700018 ER PT J AU YAMADA, H IDA, K IGUCHI, H MORITA, S KANEKO, O ARIMOTO, H HOSOKAWA, M IDEI, H KUBO, S MATSUOKA, K NISHIMURA, K OKAMURA, S TAKEIRI, Y TAKITA, Y TAKAHASHI, C HANATANI, K HOWE, HC HIRSHMAN, SP LEE, DK AF YAMADA, H IDA, K IGUCHI, H MORITA, S KANEKO, O ARIMOTO, H HOSOKAWA, M IDEI, H KUBO, S MATSUOKA, K NISHIMURA, K OKAMURA, S TAKEIRI, Y TAKITA, Y TAKAHASHI, C HANATANI, K HOWE, HC HIRSHMAN, SP LEE, DK TI SHAFRANOV SHIFT IN THE LOW ASPECT RATIO HELIOTRON TORSATRON COMPACT HELICAL SYSTEM SO NUCLEAR FUSION LA English DT Article ID NEUTRAL-BEAM INJECTION; STELLARATOR; EQUILIBRIA AB The MHD equilibrium properties of neutral beam heated plasmas have been experimentally investigated in the Compact Helical System (CHS) - a low aspect ratio (A(p) approximately 5) heliotron/torsatron. This configuration is characterized by a strong breaking of helical symmetry. The radial profiles measured by various diagnostics have shown a significant Shafranov shift due to the plasma pressure. The deviation of the magnetic axis from its vacuum position has become as large as 50% of the minor radius. When the three-dimensional equilibrium code VMEC is used to reconstruct the equilibrium from the experimental data, the result is in good agreement with the experimentally observed Shafronov shift as well as with the diamagnetic pressure in plasmas with less-than-or-equal-to 1.2% and beta(0) less-than-or-equal-to 3.3%. This beta value corresponds to half of the conventional equilibrium beta limit defined by the Shafranov shift reaching a value of half of the minor radius. Although tangential neutral beam injection causes pressure anisotropies, p parallel-to/p perpendicular-to less-than-or-equal-to 3, the description of the equilibrium assuming isotropic pressure is consistent with the experiment. C1 KYOTO UNIV,PLASMA PHYS LAB,UJI,KYOTO 611,JAPAN. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP YAMADA, H (reprint author), NATL INST FUS SCI,NAGOYA,JAPAN. RI Ida, Katsumi/E-4731-2016 OI Ida, Katsumi/0000-0002-0585-4561 NR 29 TC 35 Z9 35 U1 0 U2 1 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 JAN PY 1992 VL 32 IS 1 BP 25 EP 32 DI 10.1088/0029-5515/32/1/I03 PG 8 WC Physics, Fluids & Plasmas SC Physics GA HD785 UT WOS:A1992HD78500003 ER PT J AU OGAWA, Y AMANO, T NAKAJIMA, N OHYABU, N YAMAZAKI, K HIRSHMAN, SP VANRIJ, WI SHAING, KC AF OGAWA, Y AMANO, T NAKAJIMA, N OHYABU, N YAMAZAKI, K HIRSHMAN, SP VANRIJ, WI SHAING, KC TI ANALYSIS OF NEOCLASSICAL TRANSPORT IN THE BANANA REGIME WITH THE DKES CODE FOR THE LARGE HELICAL DEVICE SO NUCLEAR FUSION LA English DT Article ID MONTE-CARLO EVALUATION; TOROIDAL PLASMAS; BOOTSTRAP CURRENT; PARALLEL VISCOSITY; ELECTRIC-FIELD; STELLARATORS; COEFFICIENTS; CONFINEMENT; SYSTEMS; FLUXES AB Neoclassical transport in the banana regime has been analysed with the DKES (Drift Kinetic Equation Solver) code for the Large Helical Device (LHD). It is found that in the 1/nu-regime the diffusion coefficients change by one order of magnitude of various LHD configurations, depending on the structure of the helical magnetic ripple. The neoclassical transport calculated with the DKES code is quantitatively in good agreement with a multi-helicity theory formulated by Shaing and Hokin. Incorporating the multi-helicity effect into the diffusion coefficient, the authors propose an interpolation formula for the diffusion coefficient in the 1/nu and nu-regimes. When the ion temperature is increased at a fixed density of n = 10(20) m-3, the ions undergo a transition from 1/nu-neoclassical transport to the nu-regime when T(i) > 3 keV, with a radial electric potential e-phi comparable to the ion temperature (e-phi/T(i) almost-equal-to 1). For the optimized configuration, the ion thermal diffusivity has a maximum value of almost-equal-to 3.5 m2/s at a minor radius r/a almost-equal-to 0.5. The bootstrap current has also been studied and the results have been compared with the theory. At the collisionless limit with a moderate radial electric potential of e-phi/T(i) almost-equal-to 1, the DKES calculations evaluated for various LHD configurations support the theoretical formula given by Shaing and Callen. For collision frequencies between the plateau regime and the banana regime, where the analytical theory is not applicable, the bootstrap current might become larger (by a factor of about two) than in the collisionless limit, depending on the radial electric field. C1 UNIV TOKYO,FAC ENGN,DEPT NUCL ENGN,TOKYO 113,JAPAN. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP OGAWA, Y (reprint author), NATL INST FUS SCI,NAGOYA,JAPAN. NR 27 TC 18 Z9 18 U1 0 U2 1 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 JAN PY 1992 VL 32 IS 1 BP 119 EP 132 DI 10.1088/0029-5515/32/1/I10 PG 14 WC Physics, Fluids & Plasmas SC Physics GA HD785 UT WOS:A1992HD78500010 ER PT J AU BERRINGTON, KA CLARK, REH AF BERRINGTON, KA CLARK, REH TI RECOMMENDED DATA FOR ELECTRON-IMPACT EXCITATION OF BEQ+ AND BQ+ IONS SO NUCLEAR FUSION LA English DT Article ID HELIUM-LIKE IONS; CROSS-SECTIONS; RESONANCE TRANSITION; RATE COEFFICIENTS; BE+; POLARIZATION AB A report on electron impact excitation data for ionized beryllium and boron is given. Collision strengths from new R-matrix and distorted wave calculations for these ions are presented as graphs, showing the effect of resonances at low energies. At higher energies, the collision strengths from the distorted wave calculation are fitted to simple functions of energy for each transition, and these fits are tabulated for excitation from the ground state to the n = 2 and n = 3 excited states in each ion. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP BERRINGTON, KA (reprint author), QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. NR 17 TC 20 Z9 20 U1 0 U2 0 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 PY 1992 VL 3 SU S BP 87 EP 95 PG 9 WC Physics, Fluids & Plasmas SC Physics GA KC803 UT WOS:A1992KC80300011 ER PT J AU PHANEUF, RA JANEV, RK TAWARA, H KIMURA, M KRSTIC, PS PEACH, G MAZING, MA AF PHANEUF, RA JANEV, RK TAWARA, H KIMURA, M KRSTIC, PS PEACH, G MAZING, MA TI STATUS AND CRITICAL-ASSESSMENT OF THE DATABASE FOR COLLISIONS OF BEQ+ AND BQ+ IONS WITH H, H-2 AND HE SO NUCLEAR FUSION LA English DT Article ID MULTIPLY CHARGED IONS; IONIZATION CROSS-SECTIONS; HIGHLY-STRIPPED IONS; ONE-ELECTRON CAPTURE; ATOMIC-HYDROGEN; HELIUM; EXCITATION; SINGLE; BORON AB The available cross-section database for charge exchange, excitation and ionization in collisions of Be(q+) and B(q+) ions with H, H-2 and He is critically reviewed. Reference to data sources containing cross-sections of high accuracy is given. The gaps in the database for these collisional systems have been identified, as well as the reactions for which the existing data information is of inadequate accuracy. C1 INT ATOM ENERGY AGCY, A-1011 VIENNA, AUSTRIA. NAGOYA UNIV, NATL INST FUS SCI, NAGOYA, AICHI 464, JAPAN. ARGONNE NATL LAB, ARGONNE, IL 60439 USA. INST PHYS, DEPT THEORET PHYS, BELGRADE, YUGOSLAVIA. UNIV LONDON UNIV COLL, LONDON WC1E 6BT, ENGLAND. PN LEBEDEV PHYS INST, MOSCOW, USSR. RP UNIV NEVADA, RENO, NV 89557 USA. NR 41 TC 6 Z9 6 U1 0 U2 0 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 PY 1992 VL 3 SU S BP 105 EP 112 PG 8 WC Physics, Fluids & Plasmas SC Physics GA KC803 UT WOS:A1992KC80300014 ER PT J AU PHANEUF, RA AF PHANEUF, RA TI ASSESSMENT OF ION ATOM COLLISION DATA FOR MAGNETIC FUSION PLASMA EDGE MODELING SO NUCLEAR FUSION LA English DT Article ID SELECTIVE ELECTRON-CAPTURE; MULTIPLY CHARGED IONS; CROSS-SECTION DATA; HYDROGEN-ATOMS; EXCHANGE; H-2; PROJECTILES; EXCITATION; TOKAMAKS; ENERGIES AB Cross-section data for ion-atom collision processes which play important roles in the edge plasma of magnetically confined fusion devices am surveyed and reviewed. The species considered include H, He, Li, Be, B, C, O, Ne, Al, Si, Ar, Ti, Cr, Fe, Ni, Cu, Mo, W and their ions. The most important ion-atom collision processes occurring in the edge plasma are charge exchange reactions. Excitation and ionization processes are also considered. The scope is limited to atomic species and to collision velocities corresponding to plasma ion temperatures in the range 2-200 eV. Sources of evaluated or recommended data are presented where possible, and deficiencies in the database are indicated. RP PHANEUF, RA (reprint author), OAK RIDGE NATL LAB,CTR CONTROLLED FUS ATOM DATA,DIV PHYS,OAK RIDGE,TN, USA. NR 48 TC 7 Z9 7 U1 0 U2 1 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 PY 1992 VL 2 SU S BP 75 EP 90 PG 16 WC Physics, Fluids & Plasmas SC Physics GA JM108 UT WOS:A1992JM10800006 ER PT J AU TABATA, T ITO, R SHIRAI, T NAKAI, Y HUNTER, HT PHANEUF, RA AF TABATA, T ITO, R SHIRAI, T NAKAI, Y HUNTER, HT PHANEUF, RA TI EXTENDED SCALING OF CROSS-SECTIONS FOR THE IONIZATION OF H, H-2 AND HE BY MULTIPLY CHARGED IONS SO NUCLEAR FUSION LA English DT Article ID HIGHLY-STRIPPED IONS; ATOMIC-HYDROGEN; ELECTRON-CAPTURE; SLOW H+; COLLISIONS; HELIUM; PROTONS; SINGLE; HE-2+ AB An analytic cross-section formula is given for the impact ionization of H, H-2 and He by multiply charged ions. The formula is expressed as a modified Bethe cross-section for ionization by protons, multiplied by the square of the ionic charge and an analytic scaling factor. This scaling factor behaves as E(nu) at low energies, where E represents the projectile energy and nu is approximately equal to 0.9. The values of adjustable parameters in the formula were determined by least squares fits to the experimental data collected from the literature. The lowest projectile energy of the available data is 6 keV/amu and the root mean square deviation of all data from the analytic formula is 21 %. C1 JAPAN ATOM ENERGY RES INST,TOKAI RES ESTAB,TOKAI,IBARAKI 31911,JAPAN. OAK RIDGE NATL LAB,OAK RIDGE,TN. RP TABATA, T (reprint author), UNIV OSAKA PREFECTURE,ADV SCI & TECHNOL RES INST,SAKAI,OSAKA 591,JAPAN. OI Tabata, Tatsuo/0000-0002-4432-1397 NR 19 TC 2 Z9 2 U1 0 U2 0 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 PY 1992 VL 2 SU S BP 91 EP 94 PG 4 WC Physics, Fluids & Plasmas SC Physics GA JM108 UT WOS:A1992JM10800007 ER PT J AU LARSON, DJ ANDERSON, DR ADNEY, JR SUNDQUIST, ML MILLS, FE AF LARSON, DJ ANDERSON, DR ADNEY, JR SUNDQUIST, ML MILLS, FE TI OPERATION OF A PROTOTYPE INTERMEDIATE-ENERGY ELECTRON COOLER SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB We describe the initial operation of a dc recirculating electron beam system. The system has demonstrated dc operation at 2 MeV with 0.1 A electron beams. The system is therefore appropriate for intermediate energy (gamma = 2 to gamma = 10) electron cooling of particle beams. Operation of the system relies on highly efficient recovery of the electron beam. Recovery efficiencies of 99.99% have been achieved. C1 UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. NATL ELECTROSTAT CORP,MIDDLETON,WI 53562. FERMI NATL ACCELERATOR LAB,DIV ACCELERATOR,BATAVIA,IL 60510. NR 17 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 30 EP 33 DI 10.1016/0168-9002(92)90847-W PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400005 ER PT J AU PITZL, D CARTIGLIA, N HUBBARD, B HUTCHINSON, D LESLIE, J OSHAUGHNESSY, K ROWE, W SADROZINSKI, HFW SEIDEN, A SPENCER, E ZIOCK, HJ FERGUSON, P HOLZSCHEITER, K SOMMER, WF AF PITZL, D CARTIGLIA, N HUBBARD, B HUTCHINSON, D LESLIE, J OSHAUGHNESSY, K ROWE, W SADROZINSKI, HFW SEIDEN, A SPENCER, E ZIOCK, HJ FERGUSON, P HOLZSCHEITER, K SOMMER, WF TI TYPE INVERSION IN SILICON DETECTORS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID RADIATION-DAMAGE AB Silicon strip detectors and photodiodes were irradiated in an 800 MeV proton beam. The change of the effective doping concentration was monitored by measuring diode C-V curves. Type inversion is observed at a fluence phi = 1.5 x 10(13) cm-2 Further evidence for type inversion is obtained from a study of pulses generated by an infrared LED in silicon strip detectors. A two-level parametrization is used to describe donor removal and acceptor state creation during proton irradiation: N(eff) = N(O) exp(- c-phi)- beta-PHI. We measure values of c = (5.5 +/- 1.1) x 10(14) cm2 and beta = (0.031 +/- 0.006) cm-1. After type inversion the depletion voltage increases with proton fluence. This may set the limit for the lifetime of silicon detectors at future colliders. However. the occurrence of type inversion does not degrade the performance of silicon strip detectors. The effective doping concentration showed a complex post irradiation behaviour. After a short term annealing period the doping concentration increased beyond the value that had been reached immediately after the exposure. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP PITZL, D (reprint author), UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064, USA. OI Ferguson, Phillip/0000-0002-7661-4223 NR 16 TC 86 Z9 86 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 98 EP 104 DI 10.1016/0168-9002(92)90854-W PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400012 ER PT J AU AWES, TC OBENSHAIN, FE PLASIL, F SAINI, S SORENSEN, SP YOUNG, GR AF AWES, TC OBENSHAIN, FE PLASIL, F SAINI, S SORENSEN, SP YOUNG, GR TI A SIMPLE METHOD OF SHOWER LOCALIZATION AND IDENTIFICATION IN LATERALLY SEGMENTED CALORIMETERS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID HODOSCOPE CHERENKOV SPECTROMETER; ELECTRON AB A method is proposed to calculate the first and second moments of the, spatial distribution of the energy of electromagnetic and hadronic showers measured in laterally segmented calorimeters. The technique uses a logarithmic weighting of the energy fraction observed in the individual detector cells. It is fast and simple requiring no fitting or complicated corrections for the position or angle of incidence. The method is demonstrated with GEANT simulations of a BGO detector array. The position resolution results and the e/pi separation results are found to be equal or superior to those obtained with more complicated techniques. C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. RP AWES, TC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 12 TC 46 Z9 46 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 130 EP 138 DI 10.1016/0168-9002(92)90858-2 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400016 ER PT J AU RAWOOLSULLIVAN, MW AMANN, JF ATENCIO, LG BOUDRIE, RL LOMAX, R MORRIS, CL MURRAY, M WHITTON, RM AF RAWOOLSULLIVAN, MW AMANN, JF ATENCIO, LG BOUDRIE, RL LOMAX, R MORRIS, CL MURRAY, M WHITTON, RM TI A NEW MULTIPLEXING SCHEME FOR CATHODE-STRIP READOUT CHAMBERS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID PROPORTIONAL CHAMBERS; HIGH-ACCURACY AB A multiplexing scheme for cathode strip chamber readouts which is cost-effective and efficient is described. This scheme provides an inexpensive alternative to individual-wire readout schemes, while not compromising the attractive qualities of cathode-strip chambers. A chamber with an area of 72 x 36 cm was built and tested. A position resolution of 130 +/- 50-mu-m (FWHM) was obtained with the multiplexing scheme, Details of the construction and operation of the cathode-strip chamber and its response to cosmic rays are presented here. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP RAWOOLSULLIVAN, MW (reprint author), NEW MEXICO STATE UNIV,LAS CRUCES,NM 88003, USA. NR 10 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 168 EP 172 DI 10.1016/0168-9002(92)90862-X PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400020 ER PT J AU FU, CY ALSMILLER, RG GABRIEL, TA AF FU, CY ALSMILLER, RG GABRIEL, TA TI LIQUID ARGON CALORIMETER DESIGN STUDY USING THE CALOR89 CODE SYSTEM SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID MONTE-CARLO; HADRON AB The CALOR89 code system, already in wide use, is further validated against the recently available data for a test module of the calorimeter of the DO detector, made of uranium absorbers and liquid argon. The experimental data considered include energy containment as a function of depth, the electron and pion resolutions, and the compensation ratios at 25 and 100 GeV/c. The code system is then used to predict the performance of a Pb-LAr test module under construction and to test the expected performance improvement of a second Pb-LAr module with steel-cladded Pb absorbers. It is found that with a fixed total absorber thickness of 12 mm and LAr thickness of 4 mm, varying the thickness of the steel cladding has minor effects on the compensation ratios. However, for 20 GeV/c incident electrons and 0.5-mm steel cladding, there is a significant improvement in energy resolution. RP FU, CY (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 179 EP 188 DI 10.1016/0168-9002(92)90864-Z PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400022 ER PT J AU WU, JS RHOADESBROWN, MJ BOTTCHER, C STRAYER, MR AF WU, JS RHOADESBROWN, MJ BOTTCHER, C STRAYER, MR TI DETAILED ANALYSIS OF THE BACKGROUND E+, E- SPECTRA GENERATED BY RELATIVISTIC HEAVY-ION BEAM CROSSING SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID COLLISIONS AB The spectra of e+,e- particles, generated by the peripheral interactions of fully stripped heavy ions crossing in a collider, are examined in detail. Particular attention is paid to the energy, momentum, rapidity, and angular distribution of the emitted particles. In addition, the double differential cross section is calculated for a range of rapidity and perpendicular projections of the lepton momenta. The results given here provide a definitive study of e+,e- backgrounds for detectors at heavy-ion colliders. C1 BROOKHAVEN NATL LAB,RHIC PROJECT,UPTON,NY 11973. RP WU, JS (reprint author), OAK RIDGE NATL LAB,DIV PHYS,CTR COMPUTATIONALLY INTENS PHYS,OAK RIDGE,TN 37831, USA. NR 9 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 249 EP 257 DI 10.1016/0168-9002(92)90870-A PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400028 ER PT J AU KEHOE, WL MIGNEREY, AC MORONI, A IORI, I PEASLEE, GF COLONNA, N HANOLD, K BOWMAN, DR MORETTO, LG MCMAHAN, MA WALTON, JT WOZNIAK, GJ AF KEHOE, WL MIGNEREY, AC MORONI, A IORI, I PEASLEE, GF COLONNA, N HANOLD, K BOWMAN, DR MORETTO, LG MCMAHAN, MA WALTON, JT WOZNIAK, GJ TI A MODULAR ARRAY TO DETECT COMPLEX FRAGMENTS PRODUCED IN INTERMEDIATE-ENERGY REVERSE-KINEMATICS REACTIONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID MULTIFRAGMENT EMISSION; 4-PI; NUCLEI; SYSTEM; BALL AB A segmented silicon-silicon-plastic array was constructed for studying complex fragment production in heavy-ion reaction, with incident energies of 35-100 MeV/u. The array was designed: (1) to measure the energy, position and charge of fragments with 1 less-than-or-equal-to Z less-than-or-equal-to Z(proj); (2) to have high efficiency for detecting fragments produced in reverse-kinematics reactions; (3) to detect events with two or more fragments: and (4) to have a flexible configuration. Each array telescope consists of a 300-mu-m Si detector, a 5 mm Si(Li) detector and a 7.6 cm plastic scintillator. The elements of the telescope are held by interconnecting modular packages which allow the telescopes to be close packed about the beam direction. This modular array has been used in several different experimental configurations and examples of its performance are presented. C1 UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLLEGE PK,MD 20742. UNIV MILAN,DIPARTMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,SEZ MILANO,I-20133 MILAN,ITALY. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RI Mignerey, Alice/D-6623-2011 NR 26 TC 22 Z9 22 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 258 EP 272 DI 10.1016/0168-9002(92)90871-Z PG 15 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400029 ER PT J AU ALBERGO, S COSTA, S MAZZEO, M NICOTRA, D POLI, G POTENZA, R TUVE, C CRAWFORD, HJ FLORES, I AF ALBERGO, S COSTA, S MAZZEO, M NICOTRA, D POLI, G POTENZA, R TUVE, C CRAWFORD, HJ FLORES, I TI POSITION-SENSITIVE SCINTILLATOR DISKS FOR INTERMEDIATE AND HIGH-ENERGY NEUTRON SPECTROSCOPY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SPECTROMETER; DETECTOR AB A position sensitive detector made up of thin discs of NE102 scintillating material is proposed for the detection of neutrons emitted in intermediate and high energy heavy ion reactions (0.1 less-than-or-equal-to E(n) less-than-or-equal-to 3 GeV). Positions and time of "hits" are determined by measuring the different times at which light reaches N photomultiplier tubes placed around each disc at the vertices of a regular polygon. A new method, based on Multiple Elliptical Coordinate Systems (MECS), is developed to linearize equations correlating signal times to coordinates and time of hit. C1 IST NAZL FIS NUCL,SEZ CATANIA,CATANIA,ITALY. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP ALBERGO, S (reprint author), UNIV CATANIA,DIPARTMENTO FIS,I-95124 CATANIA,ITALY. RI TUVE', Cristina/P-3933-2015 OI TUVE', Cristina/0000-0003-0739-3153 NR 9 TC 24 Z9 24 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 280 EP 286 DI 10.1016/0168-9002(92)90873-3 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400031 ER PT J AU ALEXANDREAS, DE ALLEN, RC BILLER, SD DELAY, RS DION, GM LU, XQ VISHWANATH, PR YODH, GB BERLEY, D CHANG, CY DINGUS, BL GOODMAN, JA HAINES, TJ GUPTA, S KRAKAUER, DA STARK, MJ TALAGA, RL BURMAN, RL BUTTERFIELD, K CADY, R HOFFMAN, CM LLOYDEVANS, J NAGLE, DE POTTER, ME SANDBERG, VD SINNIS, C STANISLAUS, S THOMPSON, TN WILKINSON, CA ZHANG, W ELLSWORTH, RW AF ALEXANDREAS, DE ALLEN, RC BILLER, SD DELAY, RS DION, GM LU, XQ VISHWANATH, PR YODH, GB BERLEY, D CHANG, CY DINGUS, BL GOODMAN, JA HAINES, TJ GUPTA, S KRAKAUER, DA STARK, MJ TALAGA, RL BURMAN, RL BUTTERFIELD, K CADY, R HOFFMAN, CM LLOYDEVANS, J NAGLE, DE POTTER, ME SANDBERG, VD SINNIS, C STANISLAUS, S THOMPSON, TN WILKINSON, CA ZHANG, W ELLSWORTH, RW TI THE CYGNUS EXTENSIVE AIR-SHOWER EXPERIMENT SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID GAMMA-RAYS; PERFORMANCE; SYSTEM AB The CYGNUS extensive air-shower experiment is described. The design criteria, construction and operation details, and performance characteristics are presented. A discussion of the data analysis techniques is given. Finally, several enhancements and improvements in the apparatus are described. C1 UNIV MARYLAND,COLLEGE PK,MD 20742. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. GEORGE MASON UNIV,FAIRFAX,VA 22030. TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA. NATL SCI FDN,WASHINGTON,DC 20550. UNIV LEEDS,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND. RP ALEXANDREAS, DE (reprint author), UNIV CALIF IRVINE,IRVINE,CA 92717, USA. RI Zhang, William/D-3535-2012; OI Dingus, Brenda/0000-0001-8451-7450 NR 25 TC 40 Z9 40 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 350 EP 367 DI 10.1016/0168-9002(92)90883-6 PG 18 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400041 ER PT J AU ALLEN, RC BURMAN, RL CADY, DR CHANG, CY DELAY, RS DINGUS, BL ELLSWORTH, RW GUPTA, S GOODMAN, JA HAINES, TJ KRAKAUER, DA LLOYDEVANS, J LU, XQ NAGLE, DE POTTER, ME SANDBERG, VD SENA, AJ TALAGA, RL THOMPSON, TN YODH, GB AF ALLEN, RC BURMAN, RL CADY, DR CHANG, CY DELAY, RS DINGUS, BL ELLSWORTH, RW GUPTA, S GOODMAN, JA HAINES, TJ KRAKAUER, DA LLOYDEVANS, J LU, XQ NAGLE, DE POTTER, ME SANDBERG, VD SENA, AJ TALAGA, RL THOMPSON, TN YODH, GB TI USE OF A NEUTRINO DETECTOR FOR MUON IDENTIFICATION BY THE CYGNUS AIR-SHOWER ARRAY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The muon content of extensive air showers observed by the CYGNUS experiment are measured by a well-shielded apparatus. originally used for accelerator neutrino detection. Primary identification and counting of muons relies on a 44 m2 array of multiwire proportional counters that has operated continuously since the experiment's inception to the present time. During the experiment's first 20 months, the central detector, consisting of flash-tube chambers, was used for high-resolution reconstruction of muon trajectories for a limited subsample of air showers. The ability to distinguish individual muons in the tracking device enabled verification and calibration of the muon counting by the proportional-counter system. The tracking capability was also used to verify the systematic pointing accuracy of the extensive air-shower arrival direction, as determined by the CYGNUS array, to better than 0.5-degrees. C1 UNIV CALIF IRVINE,IRVINE,CA 92717. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV MARYLAND,COLLEGE PK,MD 20742. GEORGE MASON UNIV,FAIRFAX,VA 22030. TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA. UNIV LEEDS,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND. OI Dingus, Brenda/0000-0001-8451-7450 NR 13 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1992 VL 311 IS 1-2 BP 368 EP 377 DI 10.1016/0168-9002(92)90884-7 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA GZ504 UT WOS:A1992GZ50400042 ER PT J AU GOLANSKI, A GROB, A GROB, JJ HOLLAND, OW PENNYCOOK, SJ WHITE, CW AF GOLANSKI, A GROB, A GROB, JJ HOLLAND, OW PENNYCOOK, SJ WHITE, CW TI DYNAMICS OF LATTICE DAMAGE ACCUMULATION FOR MEV IONS IN SILICON SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT SYMP OF THE 1991 SPRING MEETING OF THE EUROPEAN MATERIALS RESEARCH SOC : HIGH ENERGY ION IMPLANTATION CY MAY 28-30, 1991 CL STRASBOURG, FRANCE SP EUROPEAN MAT RES SOC ID IMPLANTATION; SI; TEMPERATURE AB Although the domination of electronic stopping over nuclear stopping may be regarded as an important practical advantage for high energy (MeV) ion processing, exact knowledge of the doping introduced into the active regions as well as of the process-associated defects and their thermal stability is essential for an understanding of device performance. In the present work we review the results of our recent investigations on lattice damage accumulation in single crystal Si resulting from high energy ion implantation in the implantation temperature (T(i)) range between liquid nitrogen temperature and 200-degrees-C. The ion species used were 1 MeV O+, 1.25 MeV Si+ and 4.8 MeV Er+ (0.2 < M2/M1 < 1.7). Ion implantation was carried out using virgin Si as well as Si containing pre-existing damage. The lattice damage was studied using. Rutherford backscattering/channeling spectrometry (RBS) and cross-sectional transmission electron microscopy (XTRM). The experimental results are correlated with the predictions of the model of Hecking and Te KaHt [Appl. Surf. Sci. 43 (1989) 87]. The temperature dependence of the damage accumulation in the virgin Si suggests that the annihilation of simple defects via intracascade and intercascade recombination processes is controlled mainly by the temperature, while the nucleation of defect clusters during implantation appears to be influenced by spatial proximity effects related to the deposited energy density. Finally, the dynamics of damage accumulation is shown to be strongly influenced by the pre-existing damage structure. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. CTR RECH NUCL,PHYS & APPLICAT SEMICOND LAB,F-67037 STRASBOURG,FRANCE. RP GOLANSKI, A (reprint author), CTR NATL ETUD TELECOMMUN,BR 98,F-38240 MEYLAN,FRANCE. NR 15 TC 6 Z9 6 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 JAN PY 1992 VL 62 IS 3 BP 365 EP 371 DI 10.1016/0168-583X(92)95258-S PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HC806 UT WOS:A1992HC80600013 ER PT J AU BELLOTTI, E CATTADORI, C CREMONESI, O FIORINI, E GERVASIO, G RAGAZZI, S SVERZELLATI, PP SZADY, AJ SZARKA, J TABARELLI DE FATIS, T ZANOTTI, L AF BELLOTTI, E CATTADORI, C CREMONESI, O FIORINI, E GERVASIO, G RAGAZZI, S SVERZELLATI, PP SZADY, AJ SZARKA, J TABARELLI DE FATIS, T ZANOTTI, L TI SEPARATION OF RARE-GASES FROM RADIOACTIVE CONTAMINANTS BY MEANS OF AN ULTRACENTRIFUGE SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article AB A sample of xenon enriched in Xe-136 has been obtained with the ultracentrifuge system of the United States Department of Energy in Oak Ridge, Tennessee. The same system has also been used for cleanup only, namely to eliminate undesired gas impurities. Measurements of radioactivity carried out with a multicell proportional chamber show that ultracentrifugation is indeed very effective in the elimination of krypton. C1 IST NAZL FIS NUCL, I-20133 MILAN, ITALY. OAK RIDGE NATL LAB, DIV APPL TECHNOL, OAK RIDGE, TN 37831 USA. RP BELLOTTI, E (reprint author), UNIV MILAN, DIPARTMENTO FIS, I-20133 MILAN, ITALY. RI Ragazzi, Stefano/D-2463-2009; OI Ragazzi, Stefano/0000-0001-8219-2074; cattadori, carla maria/0000-0001-7885-6253 NR 4 TC 7 Z9 7 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD JAN PY 1992 VL 62 IS 4 BP 529 EP 534 DI 10.1016/0168-583X(92)95386-6 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HD612 UT WOS:A1992HD61200013 ER PT J AU SADOULET, B AF SADOULET, B TI PARTICLE ASTROPHYSICS - FUNDAMENTAL ISSUES SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA ID ELLIPTICAL GALAXIES; LOCAL UNIVERSE; GLOBAL TEXTURE; DISTANCE; SPECTROSCOPY; PHOTOMETRY C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP SADOULET, B (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720, USA. NR 41 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 3 EP 16 DI 10.1016/0920-5632(92)90141-E PG 14 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300002 ER PT J AU BELLOTTI, R CAFAGNA, F CALICCHIO, M DECATALDO, G DEMARZO, C ERRIQUEZ, O FAVUZZI, C FUSCO, P GIGLIETTO, N SPINELLI, P PETRAKIS, J ANTOLINI, R BAM, BB CECCHINI, S GIACOMELLI, G MANDRIOLI, G MARGIOTTANERI, A MATTEUZZI, P PATRIZII, L PREDIERI, F SCAPPARONE, E LUGARESI, PS SPURIO, M TOGO, V AHLEN, S CORMACK, R KEARNS, E KLEIN, S LUDLAM, G MARIN, A OKADA, C STONE, J SULAK, L WORSTELL, W BARISH, B COUTU, S HONG, J KATSUVOUNIDIS, E KYRIAZOPOULOU, S LIU, G LIU, R MICHAEL, D PECK, C PIGNATANO, N SCHOLBERG, K STEELE, J WALTER, C LANE, C STEINBERG, R BATTISTONI, G BILOKON, H BLOISE, C CAMPANA, P CAVALLO, P CHIARELLA, V FORTI, C GRILLO, A IAROCCI, E MARINI, A PATERA, V RONGA, F SATTA, L SPINETTI, M VALENTE, V GUSTAVINO, C REYNOLDSON, J HABIG, A HEINZ, R MILLER, L MUFSON, S MUSSER, J NUTTER, S DICREDICO, A MONACELLI, P BERNARDINI, P MANCARELLA, G MARTELLO, D PALAMARA, O PETRERA, S PISTILLI, P SURDO, A DIEHL, E LEVIN, D LONGO, M SMITH, C TARLE, G AMBROSIO, M BARBARINO, GC GUARINO, F OSTERIA, G BALDINI, A BEMPORAD, C CEI, F GIANNINI, G GRASSI, M PAZZI, R AURIEMMA, G BUSSINO, S CHIERA, C CHRYSICOPOULOU, P CORONA, A DEVINCENZI, M FOTI, L LAMANNA, E LIPARI, P MARTELLOTTI, G ROSA, G SCIUBBA, A SEVERI, M GREEN, P WEBB, R BISI, V GIUBELLINO, P CHIESA, AM MASERA, M MONTENO, M PARLATI, S RAMELLO, L SITTA, M AF BELLOTTI, R CAFAGNA, F CALICCHIO, M DECATALDO, G DEMARZO, C ERRIQUEZ, O FAVUZZI, C FUSCO, P GIGLIETTO, N SPINELLI, P PETRAKIS, J ANTOLINI, R BAM, BB CECCHINI, S GIACOMELLI, G MANDRIOLI, G MARGIOTTANERI, A MATTEUZZI, P PATRIZII, L PREDIERI, F SCAPPARONE, E LUGARESI, PS SPURIO, M TOGO, V AHLEN, S CORMACK, R KEARNS, E KLEIN, S LUDLAM, G MARIN, A OKADA, C STONE, J SULAK, L WORSTELL, W BARISH, B COUTU, S HONG, J KATSUVOUNIDIS, E KYRIAZOPOULOU, S LIU, G LIU, R MICHAEL, D PECK, C PIGNATANO, N SCHOLBERG, K STEELE, J WALTER, C LANE, C STEINBERG, R BATTISTONI, G BILOKON, H BLOISE, C CAMPANA, P CAVALLO, P CHIARELLA, V FORTI, C GRILLO, A IAROCCI, E MARINI, A PATERA, V RONGA, F SATTA, L SPINETTI, M VALENTE, V GUSTAVINO, C REYNOLDSON, J HABIG, A HEINZ, R MILLER, L MUFSON, S MUSSER, J NUTTER, S DICREDICO, A MONACELLI, P BERNARDINI, P MANCARELLA, G MARTELLO, D PALAMARA, O PETRERA, S PISTILLI, P SURDO, A DIEHL, E LEVIN, D LONGO, M SMITH, C TARLE, G AMBROSIO, M BARBARINO, GC GUARINO, F OSTERIA, G BALDINI, A BEMPORAD, C CEI, F GIANNINI, G GRASSI, M PAZZI, R AURIEMMA, G BUSSINO, S CHIERA, C CHRYSICOPOULOU, P CORONA, A DEVINCENZI, M FOTI, L LAMANNA, E LIPARI, P MARTELLOTTI, G ROSA, G SCIUBBA, A SEVERI, M GREEN, P WEBB, R BISI, V GIUBELLINO, P CHIESA, AM MASERA, M MONTENO, M PARLATI, S RAMELLO, L SITTA, M TI SEARCH FOR STELLAR GRAVITATIONAL COLLAPSE BY MACRO - CHARACTERISTICS AND RESULTS SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA AB The first MACRO lower supermodule has been sensitive to antineutrinos from stellar gravitational collapse since spring 1989. The results with the 44 tonnes of liquid scintillator which have been instrumented to search for stellar gravitational collapse are discussed here. C1 BARTOL RES FDN,SWARTHMORE,PA 19081. UNIV BOLOGNA,I-40126 BOLOGNA,ITALY. BOSTON UNIV,BOSTON,MA 02215. CALTECH,PASADENA,CA 91125. DREXEL UNIV,PHILADELPHIA,PA 19104. INDIANA UNIV,BLOOMINGTON,IN 47401. UNIV LAQUILA,I-67100 LAQUILA,ITALY. UNIV MICHIGAN,ANN ARBOR,MI 48109. NAPLES UNIV,I-80134 NAPLES,ITALY. UNIV PISA,I-56100 PISA,ITALY. UNIV ROME,I-00100 ROME,ITALY. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. TEXAS A&M UNIV SYST,COLL STN,TX 77843. UNIV TURIN,I-10124 TURIN,ITALY. LAB NAZL GRAN SASSO,LAQUILA,ITALY. RP BELLOTTI, R (reprint author), UNIV BARI,I-70124 BARI,ITALY. RI Cei, Fabrizio/M-8891-2016; Guarino, Fausto/I-3166-2012; gustavino, carlo/K-4355-2015; Spurio, Maurizio/G-4170-2012; giglietto, nicola/I-8951-2012; Masera, Massimo/J-4313-2012; Cafagna, Francesco/A-9299-2010; Ramello, Luciano/F-9357-2013; Lamanna, Ernesto/C-7658-2012; Barbarino, Giancarlo/L-2559-2015; Martello, Daniele/J-3131-2012; OI Sciubba, Adalberto/0000-0002-3301-9176; Monteno, Marco/0000-0002-3521-6333; Cei, Fabrizio/0000-0002-8313-3540; ERRIQUEZ, Onofrio/0000-0002-9784-6568; Guarino, Fausto/0000-0003-1427-9885; Bellotti, Roberto/0000-0003-3198-2708; gustavino, carlo/0000-0003-3232-7027; Petrera, Sergio/0000-0002-6029-1255; Masera, Massimo/0000-0003-1880-5467; Coutu, Stephane/0000-0003-2923-2246; LONGO, Maurizio/0000-0001-8325-4003; giglietto, nicola/0000-0002-9021-2888; Cafagna, Francesco/0000-0002-7450-4784; Lamanna, Ernesto/0000-0002-7844-8230; Barbarino, Giancarlo/0000-0001-9253-3397; Martello, Daniele/0000-0003-2046-3910; Cormack, Robert/0000-0001-5553-9984 NR 3 TC 0 Z9 0 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 61 EP 64 PG 4 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300008 ER PT J AU GAVRIN, VN ANOSOV, OL FAIZOV, EL GAVRIN, VN KALIKHOV, AV KNODEL, TV KNYSHENKO, II KORNOUKHOV, VN MESENTSEVA, SA MIRMOV, IN OSTRINSKY, AV PSHUKOV, AM REVZIN, NE SHIKHIN, AA TIMOFEYEV, PV VERETENKIN, EP VERMUL, VM ZATSEPIN, GT BOWLES, TJ CLEVELAND, BT ELLIOTT, SR OBRIEN, HA WARK, DL WILKERSON, JF DAVIS, R LANDE, K CHERRY, ML KOUZES, RT AF GAVRIN, VN ANOSOV, OL FAIZOV, EL GAVRIN, VN KALIKHOV, AV KNODEL, TV KNYSHENKO, II KORNOUKHOV, VN MESENTSEVA, SA MIRMOV, IN OSTRINSKY, AV PSHUKOV, AM REVZIN, NE SHIKHIN, AA TIMOFEYEV, PV VERETENKIN, EP VERMUL, VM ZATSEPIN, GT BOWLES, TJ CLEVELAND, BT ELLIOTT, SR OBRIEN, HA WARK, DL WILKERSON, JF DAVIS, R LANDE, K CHERRY, ML KOUZES, RT TI SAGE - THE SOVIET-AMERICAN GALLIUM SOLAR NEUTRINO EXPERIMENT SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA ID OSCILLATIONS; MATTER AB A radiochemical Ga-71-Ge-71 experiment to determine the primary flux of neutrinos from the Sun has begun operation at the Baksan Neutrino Observatory of the Institute for Nuclear Research of the Academy of Sciences of the USSR. The number of Ga-71 atoms extracted from thirty tons of gallium was measured in five runs during the period of from January to July 1990 and in June run of 1991. Assuming that the extraction efficiency for Ge-71 atoms produced by solar neutrinos is the same as from natural Ge carrier, we observed for measurements of 1990 the product of the neutrino flux and the cross section for all sources of neutrinos to be 20+15/-20(stat.)+/- 32(syst) SNU, resulting in a limit of less than 79 SNU (90% CL). The analysis of the combined data sets of 1990 and preliminary data of June run of 1991 results in a limit of less than 63 SNU (90% CL). This is to be compared with 132 SNU predicted by the Standard Solar Model. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV PENN,PHILADELPHIA,PA 19104. LOUISIANA STATE UNIV,BATON ROUGE,LA 70803. PRINCETON UNIV,PRINCETON,NJ 08544. RP GAVRIN, VN (reprint author), ACAD SCI USSR,INST NUCL RES,MOSCOW 117312,USSR. OI Wilkerson, John/0000-0002-0342-0217 NR 17 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 75 EP 81 DI 10.1016/0920-5632(92)90149-M PG 7 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300010 ER PT J AU ROULET, E AF ROULET, E TI RESONANT ENHANCEMENT OF FLAVOR-CHANGING NEUTRINO INTERACTIONS SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA ID MASSLESS NEUTRINOS; OSCILLATIONS; MATTER AB The resonant amplification of neutrino oscillations in the presence of flavor-changing neutrino interactions with matter is analyzed. It is shown that a significant nu-flavor conversion can take place even in the absence of neutrino mixing in vacuum. To account for the solar neutrino deficit, the strength of the new interactions should be approximately 10(-2)G(F) and the resulting neutrino suppression and spectrum is similar to that in the ordinary MSW effect. I discuss some extensions of the standard model where these interactions can be present, taking into account the experimental constraints that arise mainly from the induced leptonic rare decays. RP ROULET, E (reprint author), FERMI NATL ACCELERATOR LAB,NASA FERMILAB ASTROPHYS CTR,POB 500,BATAVIA,IL 60510, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 136 EP 138 DI 10.1016/0920-5632(92)90158-O PG 3 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300019 ER PT J AU BARABASH, AS AVIGNONE, FT BRODZINSKI, RL COLLAR, JI GUERARD, CK MILEY, HS REEVES, JH UMATOV, VI AF BARABASH, AS AVIGNONE, FT BRODZINSKI, RL COLLAR, JI GUERARD, CK MILEY, HS REEVES, JH UMATOV, VI TI THE SOUDAN MO-100 DOUBLE-BETA DECAY EXPERIMENT - A STATUS-REPORT SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA ID GE-76; CD-116; SE-82 AB Double-beta decay from the ground state of Mo-100 to the 0+ excited state at 1130.29 keV in Ru-100 has been observed. A 956 g sample of molybdenum metal powder isotopically enriched to 98.468% Mo-100 was counted in a Marinelli geometry with a well-shielded, ultralow-background germanium detector. The cascade gamma-rays at 539.53 and 590.76 keV in Ru-100 were observed at the 99.998% confidence limit. The systematic errors have not yet been evaluated, but the data support a half-life of approximately 10(21) y. C1 UNIV S CAROLINA, COLUMBIA, SC 29208 USA. KURCHATOV INST ATOM ENERGY, TROICK 142092, USSR. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP BARABASH, AS (reprint author), MOSCOW THEORET & EXPTL PHYS INST, MOSCOW 117259, USSR. RI Barabash, Alexander/S-8851-2016 NR 21 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 236 EP 240 PG 5 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300040 ER PT J AU AVIGNONE, FT BRODZINSKI, RL COLLAR, JI MILEY, HS GARCIA, E MORALES, A MORALES, J NUNEZLAGOS, R REEVES, JH SAENZ, C VILLAR, JA AF AVIGNONE, FT BRODZINSKI, RL COLLAR, JI MILEY, HS GARCIA, E MORALES, A MORALES, J NUNEZLAGOS, R REEVES, JH SAENZ, C VILLAR, JA TI THEORETICAL AND EXPERIMENTAL INVESTIGATION OF COSMOGENIC RADIOISOTOPE PRODUCTION IN GERMANIUM SO NUCLEAR PHYSICS B LA English DT Article ID COLD DARK MATTER; LIMITS AB Rates were calculated for the cosmic-ray-induced production of H-3, Mn-54, Ni-57, Co-57, Co-58, Ga-65, Ga-67, Zn-65, and Ge-68 in natural germanium using two experimental neutron spectra from the literature. Reaction excitation functions were computed with a nuclear spallation code. Experimental production rates of Mn-54, Co-57, Co-58, Zn-65, Ga-67 and Ge-68 were derived from background spectra of natural isotopic abundance germanium detectors. The rate for Co-57 was also derived from data taken with a detector fabricated from germanium isotopically enriched to 86% Ge-76 and approximately 14% Ge-74. The calculated and experimental data are in agreement within a factor of two and in many cases within 30%. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV SARAGOSSA, ZARAGOZA, SPAIN. RP UNIV S CAROLINA, COLUMBIA, SC 29208 USA. RI Villar, Jose Angel/K-6630-2014; OI Villar, Jose Angel/0000-0003-0228-7589; Garcia Abancens, Eduardo/0000-0002-9827-2332 NR 7 TC 45 Z9 45 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 280 EP 285 DI 10.1016/0920-5632(92)90184-T PG 6 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300045 ER PT J AU GARCIA, E AVIGNONE, FT BRODZINSKI, RL COLLAR, JI MILEY, HS MORALES, A MORALES, J NUNEZLAGOS, R PUIMEDON, J REEVES, JH SAENZ, C VILLAR, JA AF GARCIA, E AVIGNONE, FT BRODZINSKI, RL COLLAR, JI MILEY, HS MORALES, A MORALES, J NUNEZLAGOS, R PUIMEDON, J REEVES, JH SAENZ, C VILLAR, JA TI DARK MATTER SEARCHES WITH A GERMANIUM DETECTOR AT THE CANFRANC TUNNEL SO NUCLEAR PHYSICS B LA English DT Article ID CANDIDATES; LIMITS AB Results of a search for Cold Dark Matter particles in an experiment being carried out at the Canfranc Underground Laboratory are presented. Operating a natural isotopic abundance germanium detector of 234 grams for five thousand hours and using a simple method of filtering the microphonic noise, exclusion domains for masses and cross-sections of CDM particles are derived. C1 UNIV S CAROLINA, COLUMBIA, SC 29208 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP UNIV SARAGOSSA, INST FIS NUCL & ALTAS ENERGIAS, ZARAGOZA, SPAIN. RI Villar, Jose Angel/K-6630-2014; OI Villar, Jose Angel/0000-0003-0228-7589; Garcia Abancens, Eduardo/0000-0002-9827-2332 NR 29 TC 22 Z9 22 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 286 EP 292 DI 10.1016/0920-5632(92)90185-U PG 7 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300046 ER PT J AU DRUKIER, AK AVIGNONE, FT BRODZINSKI, RL COLLAR, JI GELMINI, G MILEY, HS MORALES, A REEVES, JH SPERGEL, D AF DRUKIER, AK AVIGNONE, FT BRODZINSKI, RL COLLAR, JI GELMINI, G MILEY, HS MORALES, A REEVES, JH SPERGEL, D TI PROGRESS REPORT ON THE SEARCH FOR COLD DARK MATTER USING ULTRALOW-BACK-GROUND GERMANIUM DETECTORS AT HOMESTAKE SO NUCLEAR PHYSICS B LA English DT Article ID DOUBLE-BETA DECAY; CANDIDATES; LIMITS AB Counting rates from the two 1-kg PNL/USC ultralow-background germanium detectors are less-than-or-equal-to 0.3 counts keV-1 kg-1 d-1 between 6 and 9 keV and approximately 2 counts keV-1 kg-1 d-1 between 4 and 6 keV. These data show a significant short-time rate dependence due to blasting and other mining operations in the Homestake gold mine. The mean shift in the centroid of the gallium x-ray peak was about 50 eV over a total period of about 500 days, indicating adequate stability for a search for annual modulation of Cold Dark Matter (CDM) particles. C1 UNIV SARAGOSSA, ZARAGOZA, SPAIN. PRINCETON UNIV, PRINCETON, NJ 08544 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV CALIF LOS ANGELES, LOS ANGELES, CA 90024 USA. RP UNIV S CAROLINA, COLUMBIA, SC 29208 USA. RI Spergel, David/A-4410-2011 NR 16 TC 24 Z9 24 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 293 EP 296 DI 10.1016/0920-5632(92)90186-V PG 4 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300047 ER PT J AU COLLAR, JI AVIGNONE, FT BRODZINSKI, RL GARCIA, E MILEY, HS MORALES, A MORALES, J NUNEZLAGOS, R REEVES, JH SAENZ, C VILLAR, JA AF COLLAR, JI AVIGNONE, FT BRODZINSKI, RL GARCIA, E MILEY, HS MORALES, A MORALES, J NUNEZLAGOS, R REEVES, JH SAENZ, C VILLAR, JA TI BOUNDS ON DIURNAL MODULATIONS FROM THE COSME-II DARK MATTER EXPERIMENT SO NUCLEAR PHYSICS B LA English DT Article ID CANDIDATES; LIMITS AB A search was conducted for diurnal modulation in the background of the 0.234 kg germanium detector, COSME-II, due to the hypothesized scattering of cold dark matter (CDM) particles in the Earth. Bounds on CDM are presented, and a theory of CDM scattering in the Earth is discussed. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV SARAGOSSA, ZARAGOZA, SPAIN. RP UNIV S CAROLINA, COLUMBIA, SC 29208 USA. RI Villar, Jose Angel/K-6630-2014; OI Villar, Jose Angel/0000-0003-0228-7589; Garcia Abancens, Eduardo/0000-0002-9827-2332 NR 15 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 297 EP 301 DI 10.1016/0920-5632(92)90187-W PG 5 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300048 ER PT J AU KAFKA, T AF KAFKA, T TI THE SOUDAN-2 EXPERIMENT SO NUCLEAR PHYSICS B LA English DT Article ID PROPORTIONAL-TUBE ARRAY AB The present status of the Soudan-2 underground experiment is reported. This presentation includes: The detector design and performance, several aspects of the data analysis (single and multiple muon detection, magnetic monopole search), and future plans (search for long baseline nu oscillations). A sample of contained events is being accumulated, and results on nucleon decay search and on atmospheric neutrino events will be available later. C1 UNIV MINNESOTA, MINNEAPOLIS, MN 55455 USA. UNIV OXFORD, OXFORD, ENGLAND. TUFTS UNIV, BOSTON, MA 02111 USA. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. RP ARGONNE NATL LAB, ARGONNE, IL 60439 USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 377 EP 381 DI 10.1016/0920-5632(92)90197-Z PG 5 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300058 ER PT J AU BELLOTTI, R CAFAGNA, F CALICCHIO, M DECATALDO, G DEMARZO, C ERRIQUEZ, O FAVUZZI, C FUSCO, P GIGLIETTO, N SPINELLI, P PETRAKIS, J CECCHINI, S GIACOMELLI, G MANDRIOLI, G MARGIOTTANERI, A MATTEUZZI, P PATRIZII, L PREDIERI, F SANZANI, GL SCAPPARONE, E LUGARESI, PS SPURIO, M TOGO, V AHLEN, S CORMACK, R KEARNS, E KLEIN, S LUDLAM, G MARIN, A OKADA, C STONE, JL SULAK, L WORSTELL, W BARISH, B COUTU, S HONG, J KATSUVOUNIDIS, E KYRIAZOPOULOU, S LIU, G LIU, R MICHAEL, D PECK, C PIGNATANO, N SCHOLBERG, K STEELE, J WALTER, CW LANE, C STEINBERG, R BATTISTONI, G BILOKON, H BLOISE, C CAMPANA, P CARBONI, M CHIARELLA, V FORTI, C GRILLO, A IAROCCI, E MARINI, A PATERA, V RONGA, F SATTA, L SPINETTI, M VALENTE, V GUSTAVINO, C REYNOLDSON, J HABIG, A HEINZ, R MILLER, L MUFSON, S MUSSER, J NUTTER, S DICREDICO, A MONACELLI, P BERNARDINI, P MANCARELLA, G MARTELLO, D PALAMARA, O PETRERA, S PISTILLI, P SURDO, A DIEHL, E LEVIN, D LONGO, M SMITH, C TARLE, G AMBROSIO, M BARBARINO, GC GUARINO, F OSTERIA, G BALDINI, A BEMPORAD, C CEI, F GIANNINI, G GRASSI, M PAZZI, R AURIEMMA, G BUSSINO, S CHIERA, C CHRYSICOPOULOU, P CORONA, A DEVINCENZI, M FOTI, L LAMANNA, E LIPARI, P MARTELLOTTI, G ROSA, G SCIUBBA, A SEVERI, M GREEN, P WEBB, R BISI, V GIUBELLINO, P CHIESA, AM MASERA, M MONTENO, M PARLATI, S RAMELLO, L SITTA, M AGLIETTA, M ALESSANDRO, B ARNEODO, F BERGAMASCO, L CASTAGNOLI, C CASTELLINA, A CATTADORI, C CHIAVASSA, A CINI, G PIAZZOLI, BD FULGIONE, W GALEOTTI, P GHIA, PL MANNOCCHI, G MORELLO, C NAVARRA, G RICCATI, L SAAVEDRA, O TRINCHERO, GC VALLANIA, P VERNETTO, S AF BELLOTTI, R CAFAGNA, F CALICCHIO, M DECATALDO, G DEMARZO, C ERRIQUEZ, O FAVUZZI, C FUSCO, P GIGLIETTO, N SPINELLI, P PETRAKIS, J CECCHINI, S GIACOMELLI, G MANDRIOLI, G MARGIOTTANERI, A MATTEUZZI, P PATRIZII, L PREDIERI, F SANZANI, GL SCAPPARONE, E LUGARESI, PS SPURIO, M TOGO, V AHLEN, S CORMACK, R KEARNS, E KLEIN, S LUDLAM, G MARIN, A OKADA, C STONE, JL SULAK, L WORSTELL, W BARISH, B COUTU, S HONG, J KATSUVOUNIDIS, E KYRIAZOPOULOU, S LIU, G LIU, R MICHAEL, D PECK, C PIGNATANO, N SCHOLBERG, K STEELE, J WALTER, CW LANE, C STEINBERG, R BATTISTONI, G BILOKON, H BLOISE, C CAMPANA, P CARBONI, M CHIARELLA, V FORTI, C GRILLO, A IAROCCI, E MARINI, A PATERA, V RONGA, F SATTA, L SPINETTI, M VALENTE, V GUSTAVINO, C REYNOLDSON, J HABIG, A HEINZ, R MILLER, L MUFSON, S MUSSER, J NUTTER, S DICREDICO, A MONACELLI, P BERNARDINI, P MANCARELLA, G MARTELLO, D PALAMARA, O PETRERA, S PISTILLI, P SURDO, A DIEHL, E LEVIN, D LONGO, M SMITH, C TARLE, G AMBROSIO, M BARBARINO, GC GUARINO, F OSTERIA, G BALDINI, A BEMPORAD, C CEI, F GIANNINI, G GRASSI, M PAZZI, R AURIEMMA, G BUSSINO, S CHIERA, C CHRYSICOPOULOU, P CORONA, A DEVINCENZI, M FOTI, L LAMANNA, E LIPARI, P MARTELLOTTI, G ROSA, G SCIUBBA, A SEVERI, M GREEN, P WEBB, R BISI, V GIUBELLINO, P CHIESA, AM MASERA, M MONTENO, M PARLATI, S RAMELLO, L SITTA, M AGLIETTA, M ALESSANDRO, B ARNEODO, F BERGAMASCO, L CASTAGNOLI, C CASTELLINA, A CATTADORI, C CHIAVASSA, A CINI, G PIAZZOLI, BD FULGIONE, W GALEOTTI, P GHIA, PL MANNOCCHI, G MORELLO, C NAVARRA, G RICCATI, L SAAVEDRA, O TRINCHERO, GC VALLANIA, P VERNETTO, S TI MEASUREMENT OF ELECTROMAGNETIC AND TEV MUON COMPONENTS OF EXTENSIVE AIR SHOWERS BY EAS-TOP AND MACRO EXPERIMENTS SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA ID DEEP-UNDERGROUND MUONS AB The simultaneous observation of the electromagnetic and TeV muon components of extensive air showers by the EAS-TOP and MACRO detectors, respectively, is described for a period of 100 days in 1990. The two detectors and their combined resolutions are briefly reviewed and muon multiplicity distributions for various detector configurations are presented. A first analysis of the physical parameters N(mu) and N(e) related to the study of the primary composition at E0 = 10(14) - 10(16) eV is also presented. C1 BARTOL RES FDN,SWARTHMORE,PA 19081. TEXAS A&M UNIV SYST,COLL STN,TX 77843. UNIV TURIN,I-10124 TURIN,ITALY. UNIV BOLOGNA,I-40126 BOLOGNA,ITALY. BOSTON UNIV,BOSTON,MA 02215. CALTECH,PASADENA,CA 91125. DREXEL UNIV,PHILADELPHIA,PA 19104. INDIANA UNIV,BLOOMINGTON,IN 47401. UNIV LAQUILA,I-67100 LAQUILA,ITALY. UNIV MICHIGAN,ANN ARBOR,MI 48109. NAPLES UNIV,I-80134 NAPLES,ITALY. UNIV PISA,I-56100 PISA,ITALY. UNIV ROME,I-00100 ROME,ITALY. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. LAB NAZL GRAN SASSO,LAQUILA,ITALY. CNR,IST COSMOGEOFIS,TURIN,ITALY. RP BELLOTTI, R (reprint author), UNIV BARI,I-70124 BARI,ITALY. RI Guarino, Fausto/I-3166-2012; Fulgione, Walter/C-8255-2016; Chiavassa, Andrea/A-7597-2012; Spurio, Maurizio/G-4170-2012; fulgione, walter/I-5232-2012; giglietto, nicola/I-8951-2012; Masera, Massimo/J-4313-2012; Cafagna, Francesco/A-9299-2010; Arneodo, Francesco/B-8076-2013; Ramello, Luciano/F-9357-2013; Lamanna, Ernesto/C-7658-2012; Barbarino, Giancarlo/L-2559-2015; Martello, Daniele/J-3131-2012; Cei, Fabrizio/M-8891-2016; gustavino, carlo/K-4355-2015; OI cattadori, carla maria/0000-0001-7885-6253; Aglietta, Marco/0000-0001-8354-5388; Vallania, Piero/0000-0001-9089-7875; Guarino, Fausto/0000-0003-1427-9885; Vernetto, Silvia Teresa/0000-0001-7270-7556; Castellina, Antonella/0000-0002-0045-2467; Fulgione, Walter/0000-0002-2388-3809; Cormack, Robert/0000-0001-5553-9984; giglietto, nicola/0000-0002-9021-2888; Cafagna, Francesco/0000-0002-7450-4784; Arneodo, Francesco/0000-0002-1061-0510; Lamanna, Ernesto/0000-0002-7844-8230; Barbarino, Giancarlo/0000-0001-9253-3397; Martello, Daniele/0000-0003-2046-3910; Sciubba, Adalberto/0000-0002-3301-9176; Monteno, Marco/0000-0002-3521-6333; Cei, Fabrizio/0000-0002-8313-3540; gustavino, carlo/0000-0003-3232-7027; Carboni, Massimo/0000-0003-4296-3799; Petrera, Sergio/0000-0002-6029-1255; Masera, Massimo/0000-0003-1880-5467; Coutu, Stephane/0000-0003-2923-2246 NR 7 TC 0 Z9 0 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 393 EP 396 PG 4 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300062 ER PT J AU BRODZINSKI, RL MILEY, HS REEVES, JH AVIGNONE, FT AF BRODZINSKI, RL MILEY, HS REEVES, JH AVIGNONE, FT TI ULTRA-LOW BACKGROUND GERMANIUM SPECTROMETRY - TECHNIQUES AND RESULTS SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON THEORETICAL AND PHENOMENOLOGICAL ASPECTS OF UNDERGROUND PHYSICS ( TAUP 91 ) CY SEP 09-13, 1991 CL TOLEDO, SPAIN SP UNIV ZARAGOZA, SPANISH COMM SCI & TECHNOL, MINIST SCI & EDUC SPAIN, AUTONOMOUS GOVT ARAGON, RES ADVISORY COMM, UNIV VALENCIA, UNIV CASTILLA LAMANCHA ID BETA DECAY; GE-76 AB Ultimate sensitivity in gamma-ray spectrometry can be attained only by reducing background. The relative magnitudes of various sources of background and methods for reducing them in germanium gamma-ray spectrometers are given. Results are presented at sensitivity levels so low that double-beta decay of Ge-76 constitutes an unwanted background. C1 UNIV S CAROLINA, COLUMBIA, SC 29208 USA. RP BRODZINSKI, RL (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 4 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PY 1992 SU 28A BP 415 EP 419 DI 10.1016/0920-5632(92)90206-8 PG 5 WC Physics, Particles & Fields SC Physics GA JZ403 UT WOS:A1992JZ40300067 ER PT J AU TALEYARKHAN, RP AF TALEYARKHAN, RP TI ANALYSIS AND MODELING OF FISSION-PRODUCT RELEASE FROM VARIOUS URANIUM ALUMINUM PLATE-TYPE REACTOR-FUELS SO NUCLEAR SAFETY LA English DT Article AB This article provides a perspective overview and analysis of volatile fission-product release data obtained for uranium-aluminum (U-Al) reactor fuels, U-Alx (alloy and dispersed), U3O8-Al (dispersed), U3Si2-Al (dispersed), and U3Si-Al (dispersed). Several shortcomings in the experimental data bases have been highlighted and areas of uncertainty related to extrapolation of correlation predictions identified. Fission-product release characteristics for the U-Al reactor fuels have been shown to be radically different from those for the light-water-reactor fuels. Significant dependencies that exist on ambient medium, rate of release,fuel type and structure, fission-product chemistry, and burnup are analyzed. The potential inaccuracies involved in using the CORSOR (i.e., first-order exponential) approach for modeling release rate dependence for U-Al fuels with time are demonstrated, and an alternate formulation that captures characteristic trends is suggested. A library of correlations and methods for predicting release rates (for each individual volatile species) that may vary with time, ambient environment, burnup, and temperature were developed on the basis of analysis of characteristic data trends, phenomenological aspects, and regression analysis. A comparison of suggested correlation predictions against measurements resulted in an overall mean value and standard deviation of 1.02 and 0.22, respectively, over the entire temperature range investigated. Overall, statistics improve significantly (mean, 1.0; standard deviation, 0.09) if the Hanford Engineering Development Laboratory data are excluded. RP TALEYARKHAN, RP (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 15 TC 1 Z9 1 U1 1 U2 1 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 6 EP 22 PG 17 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600003 ER PT J AU WOOD, RT MILLER, LF PEREZ, RB AF WOOD, RT MILLER, LF PEREZ, RB TI APPLICATIONS OF A SURVEILLANCE AND DIAGNOSTICS METHODOLOGY USING NEUTRON NOISE FROM A PRESSURIZED-WATER REACTOR SO NUCLEAR SAFETY LA English DT Article AB Two applications of a noise diagnostic methodology were performed with ex-core neutron detector data from a pressurized-water reactor (PWR). A feedback dynamics model of the neutron power spectral density was derived from a low-order whole-plant physical model made stochastic with the Langevin technique. From a functional fit to plant data, the response of the dynamic system to changes in important physical parameters was evaluated by a direct sensitivity analysis. In addition, changes in monitored spectra were related to changes in physical parameters, and detection thresholds using common surveillance discriminants were determined. A resonance model was developed from perturbation theory to give the ex-core neutron detector response for small in-core mechanical motions in terms of a pole-strength factor, a resonance asymmetry (or skewness) factor, a vibration damping factor, and a frequency of vibration. The mechanical motion parameters for several resonances were determined by a functional fit of the model to plant data taken at various times during a fuel cycle and were tracked to determine trends that indicated vibrational changes of reactor internals. In addition, the resonance model gave the ability to separate the resonant components of the power spectral density after the parameters had been identified. As a result, the behavior of several vibration peaks was monitored over a fuel cycle. The noise diagnostic methodology illustrated by these applications can be used in monitoring the condition of the reactor system. Early detection of degraded mechanical components or undesirable operating conditions by using such surveillance and diagnostic techniques would enhance plant safety. C1 UNIV TENNESSEE,DEPT NUCL ENGN,KNOXVILLE,TN 37996. RP WOOD, RT (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 23 EP 35 PG 13 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600004 ER PT J AU WEBER, AH BERMAN, S KURZEJA, RJ ADDIS, RP AF WEBER, AH BERMAN, S KURZEJA, RJ ADDIS, RP TI THE MATS EXPERIMENTS - MESOSCALE ATMOSPHERIC TRANSPORT STUDIES AT THE SAVANNAH RIVER SITE SO NUCLEAR SAFETY LA English DT Article AB An overview of the Mesoscale Atmospheric Transport Studies (MATS) program is presented. MATS was an experimental program to create a data base for short-term atmospheric releases to study mesoscale atmospheric dispersion over gently rolling terrain at the Savannah River Site (SRS). Thirty-one experiments were performed over a 3-year period under daytime convective conditions using 15-minute releases of sulfur hexafluoride (SF6) tracer. Dispersion was typically measured along an arc of stationary samplers approximately 30 km downwind. Four nighttime experiments were performed with SF6 releases, and sampling was carried on for a few hours with a mobile sampling laboratory. The mobile laboratory repeatedly traversed the plume while recording tracer concentration, time, and location. Supporting meteorological data for the MATS experiments included wind and temperature measurements from an integrated meteorological tower network and computer system. The tower network consists of eight instrumented, 61-m towers located near each of SRS's major facilities and a 304-m television tower located about 16 km WNW from the SRS administrative area. Low-level soundings obtained from on-site launches of mini-rawinsondes and Airsondes provided additional data on the vertical structure of the boundary layer for 11 of the experiments. Soundings were also obtained for Athens, Ga., and Charleston, S.C., from the National Climatic Data Center. The MATS data set is available for use by diffusion researchers and modelers. Two experiments were examined in detail and compared with predictions from a simple Gaussian model to help demonstrate the usefulness of the data. These cases show that the downwind locations of tracer material were predicted adequately if uniform winds at release level were assumed but that the magnitude of the concentration was overpredicted by factors of 2.5 and 10. C1 SUNY COLL ONEONTA,DEPT EARTH SCI,ONEONTA,NY 13820. RP WEBER, AH (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER LAB,ENVIRONM TRANSPORT GRP,BLDG 773-A,RM A-1012,AIKEN,SC 29802, USA. NR 21 TC 1 Z9 1 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 58 EP 74 PG 17 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600007 ER PT J AU MUHLHEIM, MD SILVER, EG AF MUHLHEIM, MD SILVER, EG TI ACTIVITIES RELATED TO WASTE AND SPENT FUEL-MANAGEMENT SO NUCLEAR SAFETY LA English DT Article RP MUHLHEIM, MD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 76 EP 86 PG 11 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600008 ER PT J AU GREENE, RH AF GREENE, RH TI AGING ASSESSMENT OF BWR CONTROL ROD DRIVE SYSTEMS SO NUCLEAR SAFETY LA English DT Article AB This Phase I study for the Nuclear Plant Aging Research (NPAR) Program examines the aging phenomena associated with boiling-water-reactor (BWR) control rod drive mechanisms (CRDMs) and assesses the merits of various methods of managing this aging. Information for this study was acquired from (1) the results of a special CRDM aging questionnaire distributed to each U.S. BWR utility, (2) a first-of-its-kind workshop held to discuss CRDM aging and maintenance concerns, (3) an analysis of Nuclear Plant Reliability Data System (NPRDS) failure cases attributed to the CRD system, and (4) personal information exchange with industry experts. An eight-page questionnaire was prepared by the Oak Ridge National Laboratory (ORNL) and distributed to all domestic BWR plants. The survey solicited site-specific data on CRDM degradation and failure experience, maintenance and aging interactions, and current testing procedures. For first-hand information on CRDM aging histories, a workshop was sponsored by ORNL to discuss CRDM performance and the overall questionnaire results with utility participants. The 3-day meeting on CRDM aging and maintenance was attended by 26 utility personnel from 21 BWR plants and 14 vendor and commercial representatives. These attendees provided invaluable information needed for understanding degradation mechanisms and maintenance constraints associated with BWR CRDMs. As part of this study, nearly 3500 NPRDS failure reports have been analyzed to examine the prevailing failure trends for CRD system components. An investigation was conducted to summarize the occurrence frequency of these component failures, discovery methods, reported failure causes, their respective symptoms, and actions taken by utilities to restore component and system service. The results of this research have identified the predominant CRDM failure modes and causes. In addition, recommendations are presented that identify specific actions utilities can implement to mitigate CRDM aging. An evaluation has also been made of certain maintenance practices and tooling that have enabled some utilities to reduce as low as reasonably achievable (ALARA) exposures received from routine CRDM replacement and rebuilding activities. RP GREENE, RH (reprint author), OAK RIDGE NATL LAB,NUCL PLANT AGING RES PROGRAM,POB 2009,OAK RIDGE,TN 37831, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 87 EP 99 PG 13 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600009 ER PT J AU CLETCHER, JW AF CLETCHER, JW TI REACTOR SHUTDOWN EXPERIENCE SO NUCLEAR SAFETY LA English DT Article RP CLETCHER, JW (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 100 EP 102 PG 3 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600010 ER PT J AU MURPHY, GA AF MURPHY, GA TI SELECTED SAFETY-RELATED EVENTS SO NUCLEAR SAFETY LA English DT Article RP MURPHY, GA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 103 EP 109 PG 7 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600011 ER PT J AU MUHLHEIM, MD SILVER, EG AF MUHLHEIM, MD SILVER, EG TI OPERATING UNITED-STATES POWER-REACTORS SO NUCLEAR SAFETY LA English DT Article RP MUHLHEIM, MD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 110 EP 128 PG 19 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600012 ER PT J AU MUHLHEIM, MD SILVER, EG AF MUHLHEIM, MD SILVER, EG TI GENERAL ADMINISTRATIVE ACTIVITIES SO NUCLEAR SAFETY LA English DT Article RP MUHLHEIM, MD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 129 EP 139 PG 11 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600013 ER PT J AU QUEENER, DS AF QUEENER, DS TI REPORTS, STANDARDS, AND SAFETY GUIDES SO NUCLEAR SAFETY LA English DT Article RP QUEENER, DS (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 57 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD JAN-MAR PY 1992 VL 33 IS 1 BP 139 EP 146 PG 8 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA JL476 UT WOS:A1992JL47600014 ER PT J AU WHEELER, FJ NIGG, DW AF WHEELER, FJ NIGG, DW TI 3-DIMENSIONAL RADIATION-DOSE DISTRIBUTION ANALYSIS FOR BORON NEUTRON-CAPTURE THERAPY SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article; Proceedings Paper CT 1990 ANNUAL MEETING OF THE AMERICAN NUCLEAR SOC CY 1990 CL NASHVILLE, TN SP AMER NUCL SOC AB Calculation of physically realistic radiation dose distributions for boron neutron capture therapy (BNCT) is a complex, three-dimensional problem. Traditional one-dimensional (slab) and two-dimensional (cylindrical) models, while useful for neutron beam design and performance analysis, do not provide sufficient accuracy for actual clinical use because the assumed symmetries inherent in such models do not ordinarily exist in the real world. Fortunately, however, it is no longer necessary to make these types of simplifying assumptions. Recent dramatic advances in computing technology have brought full three-dimensional dose distribution calculations for BNCT into the realm of practicality for a wide variety of routine applications. Once a geometric model and the appropriate material compositions have been determined, either stochastic (Monte Carlo) or deterministic calculations of all dose components of interest can now be performed more rapidly and inexpensively for the true three-dimensional geometries typical of actual clinical applications of BNCT. Demonstrations of both Monte Carlo and deterministic techniques for performing three-dimensional dose distribution analysis for BNCT are provided. Calculated results are presented for a three-dimensional Lucite canine-head phantom irradiated in the epithermal neutron beam available at the Brookhaven Medical Research Reactor. The deterministic calculations are performed using the three-dimensional discrete ordinates method. The Monte Carlo calculations employ a novel method for obtaining spatially detailed radiation flux and dose distributions without the use of flux-at-a-point estimators. The calculated results are in good agreement with each other and with thermal neutron flux measurements taken using copper-gold flux wires placed at various locations in the phantom. Three-dimensional dose distribution calculations using both techniques are also presented for the same canine phantom irradiated in the proposed epithermal neutron beam in the Power Burst Facility (PBF) reactor located at the Idaho National Engineering Laboratory. Again, calculated results obtained using the two methods are in good agreement. This exercise allows a direct comparison of the performance of the two epithermal neutron beams for a realistic three-dimensional BNCT application. The PBF beam has a lower level of fast neutron contamination and is much better collimated, resulting in a significantly higher therapeutic ratio (tumor dose relative to normal tissue dose), especially for deep-seated tumor locations. RP WHEELER, FJ (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 11 TC 25 Z9 25 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD JAN PY 1992 VL 110 IS 1 BP 16 EP 31 PG 16 WC Nuclear Science & Technology SC Nuclear Science & Technology GA GZ038 UT WOS:A1992GZ03800003 ER PT J AU BADHWAR, GD KONRADI, A HARDY, A BRABY, LA AF BADHWAR, GD KONRADI, A HARDY, A BRABY, LA TI ACTIVE DOSIMETRIC MEASUREMENTS ON SHUTTLE FLIGHTS SO NUCLEAR TRACKS AND RADIATION MEASUREMENTS LA English DT Article AB A tissue-equivalent proportional counter spectrometer capable of measuring the absorbed dose and dose distribution as a function of linear energy transfer (LET) and time, for all penetrating radiation in space, is described. This instrument weighs about 0.7 kg and was flown on the STS-31 (28.5-degrees x 620 km) flight of the Space Shuttle, 24-29 April 1990. The measured total dose is in excellent agreement with the calculations based on the AP8MAX model of the trapped radiation belt protons. The observed LET frequency distribution is also in excellent agreement with calculations based on this model. Active instruments can provide more detailed dosimetry for crew risk assessment than the thermoluminescent detectors or a plastic track detector system. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP BADHWAR, GD (reprint author), NASA, LYNDON B JOHNSON SPACE CTR, NATL AERONAUT & SPACE ADM, HOUSTON, TX 77058 USA. NR 12 TC 27 Z9 27 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0735-245X J9 NUCL TRACKS RAD MEAS PD JAN PY 1992 VL 20 IS 1 BP 13 EP 20 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HD670 UT WOS:A1992HD67000004 ER PT J AU VONWRONSKI, MA HARRIS, LC TANO, K MITRA, S BIGNER, DD BRENT, TP AF VONWRONSKI, MA HARRIS, LC TANO, K MITRA, S BIGNER, DD BRENT, TP TI CYTOSINE METHYLATION AND SUPPRESSION OF O-6-METHYLGUANINE-DNA METHYLTRANSFERASE EXPRESSION IN HUMAN RHABDOMYOSARCOMA CELL-LINES AND XENOGRAFTS SO ONCOLOGY RESEARCH LA English DT Article ID HUMAN O6-METHYLGUANINE-DNA METHYLTRANSFERASE; O-6-ALKYLGUANINE-DNA ALKYLTRANSFERASE; ESCHERICHIA-COLI; HUMAN-TUMOR; DNA METHYLTRANSFERASE; MAMMALIAN-CELLS; GENE-EXPRESSION; ALKYLATED DNA; PROTEIN; REPAIR AB Human tumor cell lines that do not expreSS O6-methylguanine-DNA methyltransferase (MGMT) in detectable quantities (Mer-) are hypersensitive to the effects of O6-guanine-alkylating agents. Because the Mer- phenotype enhances tumor response to such agents, we investigated possible mechanisms involved in regulation of MGMT expression in a panel of Mer+ and Mer- pediatric rhabdomyosarcoma xenograft and cell lines. All Mer- cell and xenograft lines lacked not only MGMT activity but also the protein and mRNA as well, suggesting that its expression is transcriptionally regulated. Transfection of Mer+ and Mer- rhabdomyosarcoma cell lines with MGMT gene promoter-CAT constructs yielded similar levels of CAT expression, indicating that Mer- cells possessed the necessary factors to support transcription. Methylation in the 5'-untranslated region of the MGMT gene was assayed by Southern analysis using methylation-sensitive restriction enzymes. Digestion with HpaII and its methylation-insensitive isoschizomer, MspI, revealed little overall correlation between methylation and MGMT expression. However, methylation in a single SmaI site at position-69 was observed in all MGMT deficient lines but not in any MGMT expressing lines. These results suggest that methylation of specific cytosines in the MGMT promoter may play a role in suppressing its expression, as well as being a potentially useful marker for the Mer- phenotype. C1 ST JUDE CHILDRENS RES HOSP, DEPT BIOCHEM & CLIN PHARMACOL, MEMPHIS, TN 38101 USA. UNIV TENNESSEE, GRAD SCH BIOMED SCI, DIV BIOL, KNOXVILLE, TN 37996 USA. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. DUKE UNIV, MED CTR, DEPT PATHOL, DURHAM, NC 27710 USA. DUKE UNIV, MED CTR, PREUSS LAB BRAIN TUMOR RES, DURHAM, NC 27710 USA. UNIV TENNESSEE, CTR HLTH SCI, COLL MED, DEPT PHARMACOL, MEMPHIS, TN 38163 USA. FU NCI NIH HHS [CA-14799, CA-23099, CA-36888] NR 45 TC 37 Z9 37 U1 0 U2 0 PU COGNIZANT COMMUNICATION CORP PI PUTNAM VALLEY PA 18 PEEKSKILL HOLLOW RD, PO BOX 37, PUTNAM VALLEY, NY 10579 USA SN 0965-0407 J9 ONCOL RES JI Oncol. Res. PY 1992 VL 4 IS 4-5 BP 167 EP 174 PG 8 WC Oncology SC Oncology GA JH839 UT WOS:A1992JH83900005 PM 1504376 ER PT J AU EPSTEIN, JS DEASON, VA ABDALLAH, MG AF EPSTEIN, JS DEASON, VA ABDALLAH, MG TI IMPACT WAVE-PROPAGATION IN A THICK COMPOSITE PLATE USING DYNAMIC MOIRE INTERFEROMETRY SO OPTICS AND LASERS IN ENGINEERING LA English DT Article AB Dynamic moire interferometry is employed to study the localized impact response of a thick composite plate. The plate, 15 mm thick by 50 mm wide by 152 mm in length, consists of 0/90/0(3) graphite fibers in a Hercules AS4/3501-6 carbon/graphite pre-preg. The plate is impacted under three-point bending. 1200 l/mm gratings are replicated on the free plate edge directly under the impact site; a multiplication of two is used to obtain an in-plane displacement sensitivity of 0.4 mm. Displacements are interrogated approximately every 10-mu-s perpendicular to the 0-degrees fiber direction. Initial results outline the localized displacement directly under the impact tup as a function of time. These displacements facilitate an understanding of the resistance of thick composite plates to damage from sharp impact. C1 IDAHO NATL ENGN LAB,APPL OPT GRP,IDAHO FALLS,ID 83415. HERCULES ADV MAT & SYST CO,ADV COMPOSITES TECHNOL,MAGNA,UT 84044. RP EPSTEIN, JS (reprint author), IDAHO NATL ENGN LAB,FRACTURE BEHAV GRP,IDAHO FALLS,ID 83415, USA. NR 8 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0143-8166 J9 OPT LASER ENG JI Opt. Lasers Eng. PY 1992 VL 17 IS 1 BP 35 EP 46 DI 10.1016/0143-8166(92)90025-3 PG 12 WC Optics SC Optics GA HZ702 UT WOS:A1992HZ70200004 ER PT J AU RATOWSKY, RP FLECK, JA FEIT, MD AF RATOWSKY, RP FLECK, JA FEIT, MD TI ACCURATE SOLUTION OF THE HELMHOLTZ-EQUATION BY LANCZOS ORTHOGONALIZATION FOR MEDIA WITH LOSS OR GAIN SO OPTICS LETTERS LA English DT Article ID PROPAGATION AB The numerical scheme for solving the Helmholtz equation, based on the Lanczos orthogonalization scheme, is generalized so that it can be applied to media with space-dependent absorption or gain profiles. RP RATOWSKY, RP (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Feit, Michael/A-4480-2009 NR 8 TC 11 Z9 11 U1 1 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 1 PY 1992 VL 17 IS 1 BP 10 EP 12 DI 10.1364/OL.17.000010 PG 3 WC Optics SC Optics GA GZ037 UT WOS:A1992GZ03700004 PM 19784213 ER PT J AU BROWN, MS RAHN, LA DREIER, T AF BROWN, MS RAHN, LA DREIER, T TI HIGH-RESOLUTION DEGENERATE 4-WAVE-MIXING SPECTRAL PROFILES OF OH SO OPTICS LETTERS LA English DT Article ID ANGULAR-DEPENDENCE; PHASE CONJUGATION; FLAME; TEMPERATURES AB High-resolution degenerate four-wave mixing spectra of the R1(9) A2-SIGMA+ --> X2-PI(0,0) transition of OH have been measured in a hydrogen/oxygen flame at atmospheric pressure where the Doppler and homogeneous linewidths are of comparable magnitude. The observed sub-Lorentzian Doppler-free line profile is fit well by existing perturbative models by using homogeneous broadening consistent with two-photon absorption measurements. Power broadening of the spectral profile with increasing pump-beam intensity was observed and is compared with predictions from a nonperturbative two-level model. C1 PHYS CHEM INST,W-6900 HEIDELBERG 1,GERMANY. RP BROWN, MS (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,POB 969,LIVERMORE,CA 94551, USA. RI Dreier, Thomas/S-6278-2016; OI Dreier, Thomas/0000-0001-8313-4992; Rahn, Larry/0000-0002-4793-1158 NR 20 TC 28 Z9 28 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 1 PY 1992 VL 17 IS 1 BP 76 EP 78 DI 10.1364/OL.17.000076 PG 3 WC Optics SC Optics GA GZ037 UT WOS:A1992GZ03700026 PM 19784235 ER PT J AU STANGER, A VOLLHARDT, KPC AF STANGER, A VOLLHARDT, KPC TI SYNTHESIS AND FLUXIONAL BEHAVIOR OF (BIS(TRIALKYLPHOSPHINE)NICKELIO)ANTHRACENE (ALKYL = ET, BU) SO ORGANOMETALLICS LA English DT Article ID POLYENE-MLN COMPLEXES; TRANSITION-METAL COMPLEXES; HAPTOTROPIC REARRANGEMENTS; DYNAMIC STEREOCHEMISTRY; RESTRICTED ROTATION; C-13 NMR; RING; DICARBONYL(HEXAETHYLBENZENE)THIOCARBONYLCHROMIUM(0); BARRIERS; SYSTEMS AB The title compounds were prepared from the respective (R3P)2NiCl2 complexes and magnesium-anthracene-(THF)3 (or anthracene in the presence of Mg or C8K). The assignment of the anthracene proton NMR signals using NOE in conjunction with magnetization-transfer techniques is described. The complexes undergo haptotropic rearrangements in which the (R3P)2Ni moiety migrates between the two terminal rings of the coordinated anthracene. The rates of these processes are concentration independent and unaffected by the presence of free anthracene and tris(trialkylphosphine)nickel. Kinetic studies in the temperature range -60 to +70-degrees-C using line shape analysis and spin saturation transfer techniques were carried out. It was found that DELTA-H double-ended-dagger = 13.6 kcal mol-1 and DELTA-S double-ended-dagger = -4.3 eu for the haptotropic rearrangement in 2, and similar values were found for 1. Possible mechanisms are discussed. According to H-1, C-13, and P-31 NMR data, the coordination number between the anthracene and the (R3P)2Ni moiety is 4. However, an equilibrium between two eta(2) structures with DELTA-G double-ended-dagger less-than-or-equal-to 4 kcal mol-1 cannot be ruled out. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. TECHNION ISRAEL INST TECHNOL,DEPT CHEM,IL-32000 HAIFA,ISRAEL. RP STANGER, A (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 34 TC 33 Z9 33 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD JAN PY 1992 VL 11 IS 1 BP 317 EP 320 DI 10.1021/om00037a054 PG 4 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA GZ040 UT WOS:A1992GZ04000054 ER PT B AU LUSK, EL MCCUNE, WW AF LUSK, EL MCCUNE, WW BE Fronhofer, B Wrightson, G TI EXPERIMENTS WITH ROO, A PARALLEL AUTOMATED DEDUCTION SYSTEM SO PARALLELIZATION IN INFERENCE SYSTEMS SE LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT INTERNATIONAL WORKSHOP ON PARALLELIZATION IN INFERENCE SYSTEMS CY DEC 17-18, 1990 CL SCHLOSS DAGSTUHL, SAARBRUCKEN, GERMANY HO SCHLOSS DAGSTUHL RP LUSK, EL (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA BERLIN BN 3-540-55425-4 J9 LECT NOTES ARTIF INT PY 1992 VL 590 BP 139 EP 162 PG 24 GA BX77E UT WOS:A1992BX77E00006 ER PT J AU GATLEY, SJ FINN, RD AF GATLEY, SJ FINN, RD TI USP STANDARDS FOR SODIUM-FLUORIDE F-18 INJECTION, A REDISCOVERED RADIOPHARMACEUTICAL SO PHARMACOPEIAL FORUM LA English DT Article ID WATER TARGET; NO-CARRIER RP GATLEY, SJ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 24 TC 0 Z9 0 U1 0 U2 0 PU US PHARMACOPEIAL CONVENTION PI ROCKVILLE PA 12601 TWINBROOK PKWY, ROCKVILLE, MD 20852 SN 0363-4655 J9 PHARMACOPEIAL FORUM JI Pharmacop. Forum PD JAN-FEB PY 1992 VL 18 IS 1 BP 2961 EP 2963 PG 3 WC Medicine, Legal; Pharmacology & Pharmacy SC Legal Medicine; Pharmacology & Pharmacy GA GY603 UT WOS:A1992GY60300005 ER PT J AU INUI, H LUZZI, DE PORTER, WD POPE, DP VITEK, V YAMAGUCHI, M AF INUI, H LUZZI, DE PORTER, WD POPE, DP VITEK, V YAMAGUCHI, M TI TRANSMISSION ELECTRON-MICROSCOPY STUDY OF DISLOCATION-STRUCTURES IN IRON-DOPED AL3TI WITH THE L1(2) STRUCTURE SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID CO74NI3TI23 SINGLE-CRYSTALS; POSITIVE TEMPERATURE-DEPENDENCE; 110 SCREW DISLOCATIONS; LI-2 ORDERED ALLOYS; PLASTIC-FLOW; FRACTURE CHARACTERISTICS; INTERMETALLIC ALLOY; CORE STRUCTURE; L12 ALLOYS; DEFORMATION AB The dislocation structures and dissociation modes of superdislocations in L1(2)-modified Al67Fe8Ti25 deformed at room temperature and 600-degrees-C were investigated by means of transmission electron microscopy. It was revealed that in samples deformed at room temperature, dislocations dissociated into two (a/3)<112> superpartials separated by superlattice intrinsic stacking faults on {111} planes with a strong tendency to form dipoles. In samples deformed at 600-degrees-C, dislocations dissociated into two (a/2)<110> superpartials separated by antiphase boundaries on the cube {001} planes, predominantly with near-edge character. The factors controlling the plastic behaviour and brittleness of the L1(2)-modified Al3Ti at low and high temperatures are discussed in relation to the observed dissociation modes of superdislocations in this material. C1 UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP INUI, H (reprint author), KYOTO UNIV,DEPT MET SCI & TECHNOL,SAKYO KU,KYOTO 606,JAPAN. NR 49 TC 25 Z9 25 U1 1 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD JAN PY 1992 VL 65 IS 1 BP 245 EP 259 PG 15 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA GY509 UT WOS:A1992GY50900018 ER PT J AU GHIRON, CA EFTINK, MR ENGLER, D NIYOGI, SK AF GHIRON, CA EFTINK, MR ENGLER, D NIYOGI, SK TI FLUORESCENCE STUDIES WITH HUMAN EPIDERMAL GROWTH-FACTOR SO PHOTOCHEMISTRY AND PHOTOBIOLOGY LA English DT Article ID ONCOGENES; PROTEINS AB Steady-state and time-resolved fluorescence studies have been performed with human epidermal growth factor, a small globular protein having two adjacent tryptophan residues near its C-terminus. Based on the relatively red fluorescence and accessibility to solute quenchers, the two tryptophan residues are found to be exposed to solvent. Anisotropy decay measurements show the dominant depolarizing process to have a sub-nanosecond rotational correlation time indicating the existence of rapid segmental motion of the fluorescing tryptophan residues. From an analysis of the low-temperature excitation anisotropy spectrum of the protein (and in comparison with that of tryptophan, the peptide melittin, and the dipeptide trp-trp), it is concluded that homo-energy transfer and/or exciton interaction occurs between the adjacent tryptophan residues. A thermal transition in the structure of the protein, which is observed by circular dichroism measurements, is not sensed by the steady-state fluorescence of the protein. This result, in conjunction with the anisotropy decay results, indicates that the two tryptophan residues are in a highly flexible C-terminus segment, which is not an integral part of the three-dimensional structure of the protein. Fluorescence measurements with three site-directed mutants also show very little variation. C1 UNIV MISSOURI,DEPT BIOCHEM,COLUMBIA,MO 65211. UNIV TENNESSEE,GRAD SCH BIOL SCI,OAK RIDGE,TN 37830. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37830. UNIV MISSISSIPPI,DEPT CHEM,UNIVERSITY,MS 38677. NR 16 TC 4 Z9 4 U1 1 U2 1 PU AMER SOC PHOTOBIOLOGY PI AUGUSTA PA BIOTECH PARK, 1021 15TH ST, SUITE 9, AUGUSTA, GA 30901-3158 SN 0031-8655 J9 PHOTOCHEM PHOTOBIOL JI Photochem. Photobiol. PD JAN PY 1992 VL 55 IS 1 BP 29 EP 34 DI 10.1111/j.1751-1097.1992.tb04205.x PG 6 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HB085 UT WOS:A1992HB08500004 PM 1603848 ER PT J AU ZOUBOULIS, E KUMAR, S WELP, U CHEN, CH CHAN, SK GRIMSDITCH, M DOWNEY, J MCNEIL, L AF ZOUBOULIS, E KUMAR, S WELP, U CHEN, CH CHAN, SK GRIMSDITCH, M DOWNEY, J MCNEIL, L TI SURFACE-WAVES ON THE A-FACE, B-FACE AND C-FACE OF UNTWINNED SINGLE-CRYSTALS OF YBA2CU3O7-GAMMA SO PHYSICA C LA English DT Article ID CONSTANTS AB Using Brillouin scattering we have measured the angular dependence of surface wave velocities on the three principal faces of untwinned single crystals of YBa2Cu3O7-delta. The angular dependence of the velocities on each surface and a comparison between the three surfaces are in agreement with calculations based on available elastic constants. There is. however, an overall discrepancy between the absolute value of the calculated and measured velocities. We obtain the elastic constants (C44, C55 and C66 and compare them with existing data. The temperature dependence, down to 20 K, is also reported for the surface velocities. C1 UNIV N CAROLINA,DEPT PHYS & ASTRON,CHAPEL HILL,NC 27599. RP ZOUBOULIS, E (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 17 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 1 PY 1992 VL 190 IS 3 BP 329 EP 332 DI 10.1016/0921-4534(92)90614-I PG 4 WC Physics, Applied SC Physics GA HC669 UT WOS:A1992HC66900020 ER PT J AU THORN, RJ AF THORN, RJ TI CONDUCTIVITY, CHEMICAL-EQUILIBRIA AND SMALL POLARON IN OXIDE SUPERCONDUCTOR - YBA2CU3O7-GAMMA SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article ID HIGH-TC SUPERCONDUCTORS; HIGH-TEMPERATURE SUPERCONDUCTIVITY; BIPOLARONIC SUPERCONDUCTIVITY; HOLE CONCENTRATION; CU-O; MODEL; VALENCE; TRANSITION; TRANSPORT; PHASE AB An investigation of the structures of the thermal variations of the conductivities, sigma(T, delta)'s, and an examination of the chemical equilibria in YBa2Cu3O7-delta indicate the existence of a small polaron in the normal state. The overall structures of sigma(T, delta)'s can be analyzed in terms of delocalized and localized (thermally activated) carriers with narrow band tunneling (Fermi energy of order of 10(-4) eV) and hopping (activation energy of the order of 10(-2) eV), respectively. The rapidly increasing sigma(T) observed in some cases at low decreasing temperatures corresponds to the heretofore unrecognized narrow band tunneling in the small polaron theory: as a consequence of the chemical equilibria which must be recognized in any mechanism of conductivity in the normal state, thermodynamic equilibria can be associated with small polarons in which charge is transported through the time rate of change in the dipole moments. A precondition for the onset of the superconducting state is the co-existence of the two mechanisms and some relation between their two parameters such as the one derived by Allender, Bray and Bardeen (Phys. Rev. B 7 (1973) 1020). The superconducting state appears to be a bipolaronic state. RP ARGONNE NATL LAB, DIV CHEM MAT SCI, ARGONNE, IL 60439 USA. NR 60 TC 10 Z9 10 U1 0 U2 0 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 JAN 1 PY 1992 VL 190 IS 3 BP 193 EP 204 DI 10.1016/0921-4534(92)90595-4 PG 12 WC Physics, Applied SC Physics GA HC669 UT WOS:A1992HC66900001 ER PT J AU FOSSHEIM, K KARKUT, MG HEILL, LK SLASKI, M SAGDAHL, LT VINOKUR, VM MURAKAMI, M FUJIMOTO, H KOSHIZUKA, N TANAKA, S GENCER, F ABELL, JS GOUGH, CE AF FOSSHEIM, K KARKUT, MG HEILL, LK SLASKI, M SAGDAHL, LT VINOKUR, VM MURAKAMI, M FUJIMOTO, H KOSHIZUKA, N TANAKA, S GENCER, F ABELL, JS GOUGH, CE TI FLUX DYNAMICS AND IRREVERSIBILITY IN YBA2CU3O7 WITH Y2BACUO5 INCLUSIONS AND IN SINGLE-CRYSTAL YBA2CU3O7 SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT NOBEL JUBILEE SYMP CY DEC 04-07, 1991 CL GOTHENBURG, SWEDEN SP NOBEL FDN, UNIV GOTEBORG, CHALMERS UNIV TECH, CITY GOTEBORG ID HIGH-TC SUPERCONDUCTORS; BA-CU-O; VORTEX-GLASS SUPERCONDUCTIVITY; OXIDE SUPERCONDUCTORS; RESISTIVE TRANSITION; CRITICAL STATE; CREEP; LINE; DEPENDENCE; LATTICE AB We have measured the ac magnetic permeability response function mu = mu' + imu" in melt-processed melt grown YBa2Cu3O7 with Y2BaCuO5 inclusions (MPMG) and in single crystal YBa2Cu3O7 (SC) in applied magnetic fields up to 8 Tesla oriented either parallel or perpendicular to the crystalline c-axis. The ac response of the two samples has been mapped out as a function of temperature, frequency, ac field amplitude, dc applied field, and field orientation. The peak in the lossy part of the susceptibility mu" is used to probe the flux dynamics in the vicinity of the irreversibility line. The data are interpreted by comparison with expectations for an anisotropic vortex glass-to-liquid transition. The inferred melting lines as well as the frequency dependence and non-linear response are in overall agreement with the expected behavior. In the range of available parameters and variables we find the system to be in the solid vortex phase for H perpendicular-to c since there is a strong H(ac) dependence and only a weak frequency dependence on the temperature position of the loss peak. For H parallel-to c, the situation is reversed, and the loss peak depends only weakly on H(ac) and strongly on the frequency. C1 SINTEF APPL PHYS,N-7034 TRONDHEIM,NORWAY. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. INST SUPERCONDUCT TECHNOL CTR,KOTO KU,TOKYO 135,JAPAN. UNIV BIRMINGHAM,SCH PHYS,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RP FOSSHEIM, K (reprint author), NORWEGIAN INST TECHNOL,DIV PHYS,N-7034 TRONDHEIM,NORWAY. NR 27 TC 5 Z9 5 U1 0 U2 2 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T42 BP 20 EP 24 DI 10.1088/0031-8949/1992/T42/005 PG 5 WC Physics, Multidisciplinary SC Physics GA JQ224 UT WOS:A1992JQ22400006 ER PT J AU JENNISON, DR BURNS, AR STECHEL, EB AF JENNISON, DR BURNS, AR STECHEL, EB TI AUGER-SPECTROSCOPY AND ELECTRONICALLY-STIMULATED SURFACE PROCESSES SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON AUGER SPECTROSCOPY AND ELECTRONIC STRUCTURE ( IWASES-II ) CY SEP 04-06, 199 CL MALMO, SWEDEN SP SWEDISH NAT SCI RES COUNCIL, ROYAL SWEDISH ACAD SCI, NOBEL COMM, LUND UNIV, CITY MALMO ID DESORPTION; SPECTRA; DISSOCIATION; PT(111); CHARGE; NO AB Electronic excitations in adsorbate layers stimulate desorption and dissociation of adsorbed molecules as well as chemical reactions between adsorbates. The highest-probability stimulated processes produce neutral desorbates and determine how surface composition is altered by electron or photon radiation. A basic understanding has emerged, due largely to laser resonance-enhanced multi-photon ionization (REMPI) experiments, which provide quantum-state resolution of the gas-phase products. Auger phenomena enter this understanding in several ways. For example, CVV Auger spectroscopy determines the screened hole-hole interaction, U, in adsorbates, which in turn provides insight into the degree of charge-transfer screening from the substrate. In those systems where screening charge is used in excitation Auger decay, screening directly determines the lifetime, which in turn can exponentially affect the yield. Reductions in screening, e.g. induced by coadsorption of electro-negative species, thus can result in giant yield enhancements. As separate issues, a finite U may prevent the fast resonant decay and thus increase the yield from two-hole excitations, as has been suggested for NO2 dissociation on Pt(111), or may assist in the localization (self-trapping) of two-hole excitations in dense adsorbate layers, as apparently is the case for NO desorption from the same surface. The latter causes the yields from one- and two-hole excitations to differ in their coverage dependence. Finally, CVV Auger spectroscopy, of course, measures the energies of two-hole excitations, which can be correlated with observed stimulated thresholds. RP JENNISON, DR (reprint author), SANDIA NATL LABS,DIV CONDENSED MATTER THEORY 1151,ALBUQUERQUE,NM 87185, USA. RI Stechel, Ellen/B-1253-2012 NR 38 TC 1 Z9 1 U1 0 U2 0 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T41 BP 36 EP 40 DI 10.1088/0031-8949/1992/T41/006 PG 5 WC Physics, Multidisciplinary SC Physics GA HT944 UT WOS:A1992HT94400007 ER PT J AU CLARKE, J KINGSTON, JJ MIKLICH, AH WELLSTOOD, FC CHAR, K COLCLOUGH, MS LEE, LP ZAHARCHUK, G AF CLARKE, J KINGSTON, JJ MIKLICH, AH WELLSTOOD, FC CHAR, K COLCLOUGH, MS LEE, LP ZAHARCHUK, G TI HIGH-TC SUPERCONDUCTING MULTILAYERS FOR SQUID MAGNETOMETERS SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT NOBEL JUBILEE SYMP CY DEC 04-07, 1991 CL GOTHENBURG, SWEDEN SP NOBEL FDN, UNIV GOTEBORG, CHALMERS UNIV TECH, CITY GOTEBORG ID FILM FLUX TRANSFORMERS; JUNCTION DC SQUIDS; THIN-FILMS; YBA2CU3O7-X; DEVICES; 77-K AB Thin-film multilayers of YBa2Cu3O7-x (YBCO) and insulating materials such as SrTiO3, MgO and CeO2 are grown in situ by laser deposition. Appropriate multilayers are used to produce bi-epitaxial grain boundary Josephson junctions, insulating crossovers - two overlapping YBCO films with an intervening inulating film, and superconducting vias - a superconducting connection between the two YBCO films via a window in the insulator. The bi-epitaxial junctions are incorporated in d.c. SQUIDs (Superconducting QUantum Interference Devices), and the crossovers and vias enable one to fabricate superconducting, multiturn flux transformers. Coupled together, the SQUID and flux transformer form a magnetometer that, operating in liquid nitrogen, has achieved a sensitivity of 0.6 pT Hz-1/2 at 10 Hz. We have used such a magnetometer to obtain magnetocardiograms. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. CONDUCTUS INC,SUNNYVALE,CA 94086. RP CLARKE, J (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 31 TC 0 Z9 0 U1 0 U2 0 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T42 BP 51 EP 56 DI 10.1088/0031-8949/1992/T42/010 PG 6 WC Physics, Multidisciplinary SC Physics GA JQ224 UT WOS:A1992JQ22400011 ER PT J AU EBERHARDT, W RUBENSSON, JE RANDALL, KJ FELDHAUS, J KILCOYNE, ALD BRADSHAW, AM XU, Z JOHNSON, PD MA, Y AF EBERHARDT, W RUBENSSON, JE RANDALL, KJ FELDHAUS, J KILCOYNE, ALD BRADSHAW, AM XU, Z JOHNSON, PD MA, Y TI RECENT ADVANCES IN STUDIES OF THE ELECTRONIC DECAY OF CORE EXCITED-STATES IN SMALL MOLECULES SO PHYSICA SCRIPTA LA English DT Article ID AUGER-SPECTRA; N2 MOLECULE; EXCITATION; SPECTROSCOPY; AUTOIONIZATION; DEEXCITATION; EMISSION AB Electronic decay spectra of neutral core excited states give new insight into charge transfer, screening and electron correlation effects in atoms, molecules and solids. The basic decay mechanism is an Auger decay but the transition occurs in a neutral rather than in a core ionized system. The study of the electronic decay of neutral core excited states yields information that is complementary to that obtained in both photoemission and Auger spectroscopy. Using synchrotron radiation as the excitation source, deexcitation spectroscopy has been developed over the past decade. Here, these developments are briefly reviewed and new prospects, opened up by the availability of high resolution, high intensity undulator radiation, are highlighted using spectra for N2 as an example. C1 FRITZ HABER INST, W-1000 BERLIN 33, GERMANY. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RP EBERHARDT, W (reprint author), FORSCHUNGSZENTRUM JULICH, IFF, POSTFACH 1913, W-5170 JULICH 1, GERMANY. RI Feldhaus, Josef/C-1130-2014; Kilcoyne, David/I-1465-2013 NR 29 TC 47 Z9 47 U1 0 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T41 BP 143 EP 148 DI 10.1088/0031-8949/1992/T41/023 PG 6 WC Physics, Multidisciplinary SC Physics GA HT944 UT WOS:A1992HT94400024 ER PT J AU BARTYNSKI, RA JENSEN, E HULBERT, SL AF BARTYNSKI, RA JENSEN, E HULBERT, SL TI NOVEL ELECTRONIC-PROPERTIES OF SOLIDS REVEALED BY AUGER-PHOTOELECTRON COINCIDENCE SPECTROSCOPY (APECS) SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT 2ND INTERNATIONAL WORKSHOP ON AUGER SPECTROSCOPY AND ELECTRONIC STRUCTURE ( IWASES-II ) CY SEP 04-06, 199 CL MALMO, SWEDEN SP SWEDISH NAT SCI RES COUNCIL, ROYAL SWEDISH ACAD SCI, NOBEL COMM, LUND UNIV, CITY MALMO ID NARROW-BAND METALS; SPECTRA; PHOTOEMISSION; SURFACES; COPPER; ZN AB The basic principles and practical considerations of Auger-Photoelectron Coincidence Spectroscopy (APECS) are discussed. In this technique, core photoelectrons and their associated Auger electrons are detected in time coincidence. For true coincidence counts, both electrons originate from the same photoexcitation event enabling one to probe local electronic structure and excitation phenomena with unprecedented discrimination. Originally developed by Haak, Sawatzky and Thomas [1, 2] using a conventional x-ray source, we have adapted APECS to a synchrotron radiation source [3], making it a practical probe of electronic structure. We discuss the results of APECS experiments performed on TaC(111) and Cu(100). In the former study, the self convolution of the density of states from a single atomic layer was determined and a novel off site Auger decay mode revealed. In the latter case, coincidence spectroscopy narrowed the photoemission line width so that the lifetime of the two hole final state could be measured. The implications of these results and other applications of APECS to probe the electronic properties of solids are discussed. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. BRANDEIS UNIV,ROSENSTIEL BASIC MED SCI RES CTR,DEPT PHYS,WALTHAM,MA 02254. RP BARTYNSKI, RA (reprint author), RUTGERS STATE UNIV,DEPT PHYS & ASTRON,SURFACE MODIFICAT LAB,POB 849,PISCATAWAY,NJ 08855, USA. NR 28 TC 28 Z9 28 U1 0 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T41 BP 168 EP 174 DI 10.1088/0031-8949/1992/T41/028 PG 7 WC Physics, Multidisciplinary SC Physics GA HT944 UT WOS:A1992HT94400029 ER PT J AU FLENSBERG, K GIRVIN, SM JONSON, M PENN, DR STILES, MD AF FLENSBERG, K GIRVIN, SM JONSON, M PENN, DR STILES, MD TI QUANTUM-MECHANICS OF THE ELECTROMAGNETIC ENVIRONMENT IN THE SINGLE-JUNCTION COULOMB BLOCKADE SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT NOBEL JUBILEE SYMP CY DEC 04-07, 1991 CL GOTHENBURG, SWEDEN SP NOBEL FDN, UNIV GOTEBORG, CHALMERS UNIV TECH, CITY GOTEBORG ID ULTRASMALL TUNNEL-JUNCTIONS; QUASI-PARTICLE DISSIPATION; SMALL METALLIC JUNCTIONS; ELECTRODYNAMIC ENVIRONMENT; JOSEPHSON JUNCTION; OHMIC CONDUCTION; FLUCTUATIONS; OSCILLATIONS; TRANSITION; ELECTRONS AB We discuss the interaction of a tunneling electron with its electromagnetic environment when the latter either is in equilibrium or includes an applied microwave field. The environment of an isolated tunnel junction is modeled by a set of harmonic oscillators that are suddenly displaced when an electron tunnels across the junction. We treat these displaced oscillators quantum mechanically, predicting behavior that is very different than that predicted by a semiclassical treatment. In particular, the shape of the zero-bias anomaly caused by the Coulomb blockade (a single-electron charging effect), is found to be strongly dependent on the impedance, Z(omega), of the leads connected to the junction. Comparison with three recent experiments demonstrates that the quantum mechanical treatment of this model correctly describes the essential physics in these systems. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405. CHALMERS UNIV TECHNOL,INST THEORET PHYS,S-41296 GOTHENBURG,SWEDEN. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. RI Jonson, Mats/D-6545-2011; Stiles, Mark/K-2426-2012; Flensberg, Karsten/N-4718-2014 OI Stiles, Mark/0000-0001-8238-4156; Flensberg, Karsten/0000-0002-8311-0103 NR 65 TC 23 Z9 23 U1 0 U2 2 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T42 BP 189 EP 206 DI 10.1088/0031-8949/1992/T42/032 PG 18 WC Physics, Multidisciplinary SC Physics GA JQ224 UT WOS:A1992JQ22400033 ER PT J AU FROYEN, S BERNARD, JE OSORIO, R ZUNGER, A AF FROYEN, S BERNARD, JE OSORIO, R ZUNGER, A TI SURFACE ENERGETICS AND ORDERING IN GAINP SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT 12TH GENERAL CONF OF THE CONDENSED MATTER DIVISION OF THE EUROPEAN PHYSICAL SOC CY APR 06-09, 1992 CL PRAGUE, CZECHOSLOVAKIA SP EUROPEAN PHYS SOC, CONDENSED MATTER DIV ID VAPOR-PHASE EPITAXY; ALLOY SEMICONDUCTORS; RECONSTRUCTIONS; STABILITY; LAYERS; GROWTH AB Although bulk III-V semiconductor alloys generally exhibit phase separation, vapor-phase epitaxial growth of Ga0.5In0.5P on GaAs (001) shows spontaneous ordering into a [111] oriented monolayer superlattice. This ordering is believed to be induced at the surface during growth. We have performed total-energy first-principles pseudopotential calculations for the surface layers of cation- and anion-terminated (001) surfaces of Ga0.5In0.5P on GaAs substrates and valence-forcefield model calculations for deeper layers. These calculations show that the relative stability of the various Ga/In arrangements is a strong function of the layer depth below the surface. At the cation-terminated surface a Ga/In atomic arrangement corresponding to the observed bulk ordering is preferred over other arrangements by 90 meV per surface atom. This preference is intimately tied to electronically driven surface reconstructions. For subsurface Ga/In layers the energy differences are generally small (<30 meV per atom), but at the fourth subsurface layer they play a critical role in controlling the three-dimensional stacking of the ordered (001) layers. Finally, thermodynamic calculations based on a configurational Hamiltonian whose interaction energies are fit to the total energy calculations show that the observed ordering can be explained as a thermodynamically stable surface phase at growth temperatures, which, depending on the atomic mobilities, may remain as a metastable bulk phase as the growth proceeds. On the basis of these results we propose a possible mechanism for the development of the ordered phase. RP FROYEN, S (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Zunger, Alex/A-6733-2013 NR 22 TC 6 Z9 6 U1 0 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PY 1992 VL T45 BP 272 EP 276 DI 10.1088/0031-8949/1992/T45/059 PG 5 WC Physics, Multidisciplinary SC Physics GA JU377 UT WOS:A1992JU37700061 ER PT J AU BOTERO, J MACEK, JH AF BOTERO, J MACEK, JH TI COULOMB-BORN CALCULATION OF THE TRIPLE-DIFFERENTIAL CROSS-SECTION FOR INNER-SHELL ELECTRON-IMPACT IONIZATION OF CARBON SO PHYSICAL REVIEW A LA English DT Article ID FAST CHARGED-PARTICLES; INELASTIC-COLLISIONS; MOLECULES; HELIUM; ATOMS; 2P AB A Coulomb-Born approximation is used to compute the triple-differential cross section for electron-impact inner-shell (1s) ionization of carbon. We employ a perturbation series that allows the use of Coulomb waves with arbitrary Z(eff) for the incoming, scattered, and ejected electrons. Most of the features of the triple-differential cross section observed experimentally are reproduced, even though these wave functions are distorted by an effective Coulomb potential and therefore do not satisfy the plane-wave boundary conditions at infinity. In order to explain some features that appear in the cross section, and in order to probe the validity of a dipole approximation, we make a multipole expansion of the transition matrix and show that the amplitudes of the multipole components are similar to those obtained in the Born approximation, while the relative phases of the multipoles differ greatly. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP UNIV TENNESSEE, KNOXVILLE, TN 37996 USA. NR 23 TC 23 Z9 24 U1 0 U2 4 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 JAN 1 PY 1992 VL 45 IS 1 BP 154 EP 165 DI 10.1103/PhysRevA.45.154 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800023 ER PT J AU ISHII, MA KIMURA, M INOKUTI, M AF ISHII, MA KIMURA, M INOKUTI, M TI ELECTRON DEGRADATION AND YIELDS OF INITIAL PRODUCTS .9. SUBEXCITATION ELECTRONS IN A MIXTURE OF MOLECULAR-OXYGEN AND MOLECULAR NITROGEN SO PHYSICAL REVIEW A LA English DT Article ID TIME-DEPENDENT ASPECTS; CROSS-SECTIONS; COLLISIONS; PHOTONS AB The behavior of subexcitation electrons in gaseous mixtures of O2 and N2 is studied by using the Spencer-Fano theory and its simplified continuous-slowing-down approximation. Because of its strong resonance around 2 eV, N2 is overwhelmingly dominant over O2 in energy-loss processes. Addition of N2 to O2, even a few percent, causes significant changes in some yields of O2. In particular, yields for electron attachment and rotational excitation for O2 show a strong nonlinearity as a function of composition, while all yields of N2 depend linearly on composition. RP ISHII, MA (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 12 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN 1 PY 1992 VL 45 IS 1 BP 190 EP 196 DI 10.1103/PhysRevA.45.190 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800027 ER PT J AU KHAKOO, MA TRAN, T BORDELON, D CSANAK, G AF KHAKOO, MA TRAN, T BORDELON, D CSANAK, G TI EXCITATION OF THE [(N+1)P-3(2)] AND [(N+1)P-3(0)] METASTABLE LEVELS OF THE HEAVY RARE-GASES FROM THE [NS-1(0)] GROUND-STATE BY ELECTRON-IMPACT SO PHYSICAL REVIEW A LA English DT Article ID INCIDENT ENERGIES; ATOM COLLISIONS; SCATTERING; ARGON AB Relative intensity ratios for the differential electron-impact excitation of the metastable states of the rare gases neon, argon, and xenon at the incident energy of 30 eV and scattering angles 10-degrees-120-degrees are presented and are compared with available theory. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP KHAKOO, MA (reprint author), CALIF STATE UNIV FULLERTON,DEPT PHYS,FULLERTON,CA 92634, USA. NR 12 TC 19 Z9 19 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 JAN 1 PY 1992 VL 45 IS 1 BP 219 EP 224 DI 10.1103/PhysRevA.45.219 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800030 ER PT J AU SHIMAKURA, N ITOH, M KIMURA, M AF SHIMAKURA, N ITOH, M KIMURA, M TI MOLECULAR TREATMENT OF ELECTRON-CAPTURE IN COLLISIONS OF N-4+ IONS WITH H-ATOMS SO PHYSICAL REVIEW A LA English DT Article ID CHARGE-TRANSFER; CROSS-SECTIONS; LOW-ENERGY; HYDROGEN AB Partial and total cross sections of electron-capture processes in collision of N4+ ions with H atoms are calculated in the collision energy range from 1 eV/amu to 10 keV/amu. Semiclassical and quantum-mechanical molecular-orbital methods with electron translation factors are employed. Two-electron processes are also considered, but they are found to make small contributions at all collision energies. The dominant electron-capture channels are found to be the N3+(3p) state at energies above 300 eV/amu and the N3+(3d) state at energies lower than 300 eV/amu. Three experiments that observed only total cross sections have been reported for this system. The agreement of the present calculation with these measurements is excellent at all energies. In particular, an oscillation observed in the experiment of Huq, Havener, and Phaneuf [Phys. Rev. A 40, 1811 (1989)] is reproduced by our calculation in the energy range 10-300 eV, and the origin of the oscillation is discussed. C1 NIIGATA UNIV,FAC SCI,DEPT CHEM,NIIGATA 95021,JAPAN. ARGONNE NATL LAB,ARGONNE,IL 60439. RICE UNIV,DEPT PHYS,HOUSTON,TX 77251. RP SHIMAKURA, N (reprint author), NIIGATA UNIV,DEPT GEN EDUC,NIIGATA 95021,JAPAN. NR 15 TC 16 Z9 16 U1 0 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 JAN 1 PY 1992 VL 45 IS 1 BP 267 EP 275 DI 10.1103/PhysRevA.45.267 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800037 ER PT J AU MACLAREN, S BEIERSDORFER, P VOGEL, DA KNAPP, D MARRS, RE WONG, K ZASADZINSKI, R AF MACLAREN, S BEIERSDORFER, P VOGEL, DA KNAPP, D MARRS, RE WONG, K ZASADZINSKI, R TI PRECISION-MEASUREMENT OF THE K-ALPHA TRANSITIONS IN HELIUM-LIKE GE-30+ SO PHYSICAL REVIEW A LA English DT Article ID HIGHLY CHARGED IONS; X-RAY TRANSITIONS; ISOELECTRONIC SEQUENCE; ENERGY-LEVELS; LAMB SHIFT; HYDROGENLIKE; SPECTRA; ARGON; LINES; ATOMS AB A measurement of the 1s2p P-1(1) --> 1s(2) S-1(0) resonance transition in heliumlike germanium (Ge30+) has been made on the Lawrence Livermore National Laboratory electron-beam ion trap to a precision of 21 ppm. The result is compared with theoretical values and confirms a trend previously seen in the differences between experiment and theory for this transition as a function of Z. Results for the 1s2p P-3(1) --> 1s(2) S-1(0) and 1s2p P-3(2) --> 1s(2) S-1(0) intercombination lines and for the 1s2s S-3(1) --> 1s(2) S-1(0) forbidden line are also presented and show similar differences with theoretical predictions. RP MACLAREN, S (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550, USA. NR 27 TC 33 Z9 33 U1 0 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 JAN 1 PY 1992 VL 45 IS 1 BP 329 EP 332 DI 10.1103/PhysRevA.45.329 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800044 ER PT J AU ANDERSSON, LR CEDERQUIST, H BARANY, A LILJEBY, L BIEDERMANN, C LEVIN, JC KELLER, N ELSTON, SB GIBBONS, JP SELLIN, IA AF ANDERSSON, LR CEDERQUIST, H BARANY, A LILJEBY, L BIEDERMANN, C LEVIN, JC KELLER, N ELSTON, SB GIBBONS, JP SELLIN, IA TI ONE-STEP AND 2-STEP DOUBLE-ELECTRON CAPTURE IN SLOW AR-6+-HE COLLISIONS SO PHYSICAL REVIEW A LA English DT Note ID LOW-ENERGY COLLISIONS; 2-ELECTRON CAPTURE; HE; O-6+ AB Double-electron capture by slow (15-30 eV/u) Ar6+ ions from He has been studied by simultaneous measurements of postcollisional projectile energy-gain and angular distributions. The recorded spectra are interpreted with the aid of a semiclassical collision model. We find evidence for distinguishable one- and two-step double-electron capture in the energy region investigated. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. MANNE SIEGBAHN INST PHYS,S-10405 STOCKHOLM,SWEDEN. NR 12 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN 1 PY 1992 VL 45 IS 1 BP R4 EP R7 DI 10.1103/PhysRevA.45.R4 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800002 ER PT J AU MACEK, JH BOTERO, J AF MACEK, JH BOTERO, J TI PERTURBATION-THEORY WITH ARBITRARY BOUNDARY-CONDITIONS FOR CHARGED-PARTICLE SCATTERING - APPLICATION TO (E,2E) EXPERIMENTS IN HELIUM SO PHYSICAL REVIEW A LA English DT Note ID DIFFERENTIAL CROSS-SECTIONS; ELECTRON-IMPACT IONIZATION; INELASTIC-COLLISIONS; MOLECULES; ATOMS AB A perturbation series of the distorted-wave Born type is developed in such a way that the slow decrease of the Coulomb potential in which the incoming and scattered particles move plays no role. We apply this approach to triple-differential cross sections for electron-impact ionization of helium at low and intermediate energies, where we use Coulomb waves with an effective charge for the incoming, scattered, and ejected electron, and show that even though these wave functions are known to satisfy the wrong Coulomb boundary conditions at infinity, they give reasonably and unexpectedly good agreement with experiment. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP UNIV TENNESSEE, DEPT PHYS & ASTRON, KNOXVILLE, TN 37996 USA. NR 20 TC 12 Z9 12 U1 0 U2 1 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 JAN 1 PY 1992 VL 45 IS 1 BP R8 EP R10 DI 10.1103/PhysRevA.45.R8 PG 3 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA GY518 UT WOS:A1992GY51800003 ER PT J AU GEHRING, PM REBELSKY, L GIBBS, D SHIRANE, G AF GEHRING, PM REBELSKY, L GIBBS, D SHIRANE, G TI MAGNETIC X-RAY-SCATTERING STUDY OF TB SO PHYSICAL REVIEW B LA English DT Article ID HOLMIUM AB The temperature and energy dependence of the magnetic scattering in the ferromagnetic spiral phase of Tb has been studied between 220 and 235 K by high-resolution x-ray-scattering techniques using synchrotron radiation. In order to see the magnetic scattering it was necessary to exploit the resonant enhancement of the magnetic x-ray cross section by tuning the incident photon energy to the Tb L(III) edge. A lower bound for this enhancement is of order 20. The magnetic modulation wave vector tau(m) decreases continuously with decreasing temperature over most of the range between the Neel and Curie points, in agreement with prior neutron-diffraction measurements. However, no evidence was found for any lock-in behavior above T(c), as has been observed in other rare earths. A very strong hysteresis effect is present in Tb below T(N), with the value of the modulation wave vector apparently depending on the rate of cooling from the paramagnetic regime. In addition, the radial linewidth of the magnetic satellite at (002)+ is not resolution-limited and increases as T --> T(c)+ while that of the charge peak at (002) remains constant. No conclusive evidence was found for scattering at higher harmonics. RP GEHRING, PM (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. OI Gehring, Peter/0000-0002-9236-2046 NR 14 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 1 BP 243 EP 248 DI 10.1103/PhysRevB.45.243 PG 6 WC Physics, Condensed Matter SC Physics GA GY516 UT WOS:A1992GY51600028 ER PT J AU BARNES, T JACOBS, AE KOVARIK, MD MACREADY, WG AF BARNES, T JACOBS, AE KOVARIK, MD MACREADY, WG TI DETAILED LANCZOS STUDY OF ONE-HOLE AND 2-HOLE BAND-STRUCTURE AND FINITE-SIZE EFFECTS IN THE T-J MODEL SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; DIMENSIONAL HEISENBERG-ANTIFERROMAGNET; QUANTUM ANTIFERROMAGNET; SPECTRAL-FUNCTION; HUBBARD ANTIFERROMAGNET; EXACT-DIAGONALIZATION; PHASE-SEPARATION; GROUND-STATE; EXCITATIONS; VACANCIES AB We present accurate numerical results for low-lying one- and two-hole states in the t-J model on a 4 x 4 lattice. We find six level crossings in the one-hole ground state for 0 < t/J < infinity; accurate t/J values of these crossings and the associated ground-state quantum numbers are given. A degeneracy of k = (0, 0) S = 1/2 and S = 3/2 one-hole levels at t/J = 1/2 is noted, which is consistent with a recent analytical result. For small t/J, the S = 1/2 one-hole and S = 0 two-hole bandwidths on the 4 x 4 lattice are W(h) = [1.190 445 7(1)]t and W(hh) = [2.575(4)]t2/J, respectively. The origin of these qualitatively different behaviors is discussed, and a simple relation is found between the small-(t/J) one-hole bandwidth and a static-hole ground-state matrix element. The linear-t term in W(h) is apparently a finite-lattice artifact. As a measure of finite-size effects we determined the rms hole-hole separation in the two-hole ground states; we find evidence of important finite-size effects for t/J greater-than-or-similar-to 1, for which the rms hole-hole separation is clearly constrained by the 4 x 4 lattice. Intermediate-(t/J) hole separations and binding energies for 0.3 less-than-or-similar-to t/J less-than-or-similar-to 1, however, scale approximately as powers of t/J, and can be used to give bulk-limit estimates for t/J = 3. In particular, we estimate that the bulk-limit ground-state rms hole-hole separation at t/J = 3 is almost-equal-to 1.8a0, corresponding to 7 angstrom in the high-temperature superconductors. The similarity to the observed in-plane coherence length of xi(ab) almost-equal-to 14 angstrom supports the identification of t-J model hole pairs with the Cooper pairs of high-temperature superconductivity. C1 OAK RIDGE NATL LAB, CTR COMPUTAT INTENS PHYS, OAK RIDGE, TN 37831 USA. UNIV TENNESSEE, DEPT PHYS, KNOXVILLE, TN 37996 USA. UNIV TORONTO, DEPT PHYS, TORONTO M5S 1A7, ONTARIO, CANADA. RP BARNES, T (reprint author), OAK RIDGE NATL LAB, DIV PHYS, OAK RIDGE, TN 37831 USA. NR 55 TC 31 Z9 31 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 1 BP 256 EP 265 DI 10.1103/PhysRevB.45.256 PG 10 WC Physics, Condensed Matter SC Physics GA GY516 UT WOS:A1992GY51600030 ER PT J AU DAEMEN, LL GUBERNATIS, JE AF DAEMEN, LL GUBERNATIS, JE TI NUMERICAL STUDY OF 2-DIMENSIONAL FLUX-LINE LATTICE STRUCTURES IN THE LONDON APPROXIMATION SO PHYSICAL REVIEW B LA English DT Article ID SUPERCONDUCTORS; SIMULATIONS AB Within the London approximation, we present the basic equations for the numerical determination of flux-line lattices in inhomogeneous materials. After describing the general formalism and the numerical techniques used, we illustrate our method by presenting results for simple inhomogeneous systems. These systems include models for grain and twin boundaries. For the twin-boundary model, we find that a higher density of vortices exists in the interface region than in the host material. This result agrees with experimental observation. RP DAEMEN, LL (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. RI Lujan Center, LANL/G-4896-2012 NR 14 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 1 BP 314 EP 318 DI 10.1103/PhysRevB.45.314 PG 5 WC Physics, Condensed Matter SC Physics GA GY516 UT WOS:A1992GY51600037 ER PT J AU LAUGHLIN, RB AF LAUGHLIN, RB TI HOLE PROPAGATOR OF THE CHIRAL SPIN LIQUID SO PHYSICAL REVIEW B LA English DT Article ID RESONATING-VALENCE-BOND; HIGH-TEMPERATURE SUPERCONDUCTIVITY; QUANTUM ANTIFERROMAGNET; FRACTIONAL-STATISTICS; STATE; GAP; EXCITATIONS; PHOTOEMISSION; SPECTROSCOPY; ELECTRONS AB The properties of a class of wave functions describing charged spinless excitations of the Kalmeyer-Laughlin spin-liquid state are studied within the context of the t-J model and the case made that they are legitimate elementary excitations of such a state. Using these wave functions and those previously proposed for the neutral spin-1/2 excitations, a variational calculation of the hole propagator is performed. The spectral density at a given momentum is found to be a broad continuum with resonant structures that move as the momentum is varied, and to be consistent with exact-diagonalization studies. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP LAUGHLIN, RB (reprint author), STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305, USA. NR 31 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 1 BP 400 EP 414 DI 10.1103/PhysRevB.45.400 PG 15 WC Physics, Condensed Matter SC Physics GA GY516 UT WOS:A1992GY51600047 ER PT J AU LIU, SH KLEMM, RA AF LIU, SH KLEMM, RA TI INTRALAYER VERSUS INTERLAYER PAIRING IN THE COPPER-OXIDE SUPERCONDUCTORS - THE 3-LAYER AND 4-LAYER PROBLEMS SO PHYSICAL REVIEW B LA English DT Article ID YBA2CU3O7-DELTA; CRYSTALS AB We have analyzed the possible superconducting states of a model layered superconductor with N conducting layers in a unit cell, for N = 3 and 4, in the presence of both intralayer and interlayer pairing interactions. In case all layers are identical, the system has the same behavior as one-layer and two-layer systems, namely that pure intralayer pairing interaction stabilizes an s-wave state with equal and isotropic gaps in all N quasiparticle bands, while interlayer pairing produces both singlet and triplet paired states with anisotropic gap functions. The singlet state is always energetically more stable than the triplet state. The analysis can be easily extended to nonidentical layers. As one example, a model for YBa2Cu3O7-delta consisting of two CuO2 layers in a unit cell separated by a layer of CuO chains is discussed. It is shown that the system reduces to an effective two-layer model, due to the large difference in electronic energy states between the planes and the chains. The chains are most likely nonsuperconducting. In another example, we show that Bi2Sr2CaCu2O8 can be reduced to an effective three-layer system. Recent tunneling data can be understood on the basis of this model. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP LIU, SH (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. NR 16 TC 25 Z9 25 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 1 BP 415 EP 430 DI 10.1103/PhysRevB.45.415 PG 16 WC Physics, Condensed Matter SC Physics GA GY516 UT WOS:A1992GY51600048 ER PT J AU COLLINS, GW SOUERS, PC MAIENSCHEIN, JL MAPOLES, ER GAINES, JR AF COLLINS, GW SOUERS, PC MAIENSCHEIN, JL MAPOLES, ER GAINES, JR TI ATOMIC-HYDROGEN CONCENTRATIONS IN SOLID D-T AND T2 SO PHYSICAL REVIEW B LA English DT Article ID DEUTERIUM; RELAXATION; ELECTRONS; TRITIUM; FUSION; VALUES AB We have measured the isothermal buildup of the atomic-hydrogen (T and D) concentration inside solid T2 and D-T from 1.3 to 10 K. The atoms are produced by the beta-decay of tritium. Measurements were made using adiabatic slow-passage electron-spin-resonance (ESR) techniques. The atom concentration increases with time and does not saturate for the duration of our experiments (> 2000 min). The atom concentration increases with decreasing temperature, and reaches values over 0.2% below 3 K. Using a simple analysis we find (1) the atomic recombination coefficients, (2) the production rate of trapped atoms that are visible with ESR, (3) the atomic diffusion coefficients, and (4) the trapping energy for atoms in the solid. Finally, we have observed that in D-T the number of D atoms is equal to the number of T atoms, while in HD + 2%T2 the number of H atoms is greater than the number of D atoms. C1 UNIV HAWAII,DEPT PHYS,HONOLULU,HI 96822. RP COLLINS, GW (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 33 TC 15 Z9 16 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 2 BP 549 EP 556 DI 10.1103/PhysRevB.45.549 PG 8 WC Physics, Condensed Matter SC Physics GA HA074 UT WOS:A1992HA07400001 ER PT J AU PYNN, R AF PYNN, R TI NEUTRON-SCATTERING BY ROUGH SURFACES AT GRAZING-INCIDENCE SO PHYSICAL REVIEW B LA English DT Article ID X-RAY; REFLECTION AB There are a number of calculations in the literature of the effect of statistical surface roughness on the specular and diffuse scattering of neutrons and x rays which impinge on surfaces at grazing incidence. These calculations do not agree with one another and in some cases lack internal consistency. In this paper I show that these discrepancies can be resolved within the distorted-wave Born approximation. The result I obtain for the specular reflectivity is the widely used version of Nevot and Croce, while that for the diffuse scattering is the same as a recent calculation by Sinha, Sirota, Garoff, and Stanley. The approxomations made by Nevot and Croce are clearly revealed by the distorted-wave Born approximation. A simple numerical algorithm is proposed for the calculation of diffuse scattering from a surface whose roughness is self-affine, and the form of the scattering is calculated for a range of parameters within this model. The calculation of diffusion scattering is extended in this paper to the case of films with rough surfaces. Correlation between roughness at the two film surfaces is considered and shown to be important for the description of neutron reflectivity data obtained with a thin film of titanium deposited on a sapphire substrate. RP PYNN, R (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545, USA. NR 23 TC 134 Z9 135 U1 2 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 2 BP 602 EP 612 DI 10.1103/PhysRevB.45.602 PG 11 WC Physics, Condensed Matter SC Physics GA HA074 UT WOS:A1992HA07400007 ER PT J AU ZHANG, Z CHEN, CC LIEBER, CM MOROSIN, B GINLEY, DS VENTURINI, EL AF ZHANG, Z CHEN, CC LIEBER, CM MOROSIN, B GINLEY, DS VENTURINI, EL TI RELATIONSHIP BETWEEN CRYSTAL-CHEMISTRY AND THE LOCAL-STRUCTURE AND ELECTRONIC-PROPERTIES OF TL2BA2CA2CU3O10 SUPERCONDUCTORS DETERMINED BY SCANNING TUNNELING MICROSCOPY AND SPECTROSCOPY SO PHYSICAL REVIEW B LA English DT Article ID CU-O SYSTEM; BULK SUPERCONDUCTIVITY; SINGLE-CRYSTALS; TL; BA; TL2BA2CACU2O8; THALLIUM; OXIDES; TL2CA2BA2CU3OX; DISPLACEMENTS AB Scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) have been used to characterize the local structure and electronic properties of Tl2Ba2Ca2Cu3O10 single crystals prepared from 4:1:3:6 and 4:1:3:10 stoichiometry melts. Magnetic-susceptibility, resistivity, x-ray-fluorescence, and x-ray-diffraction measurements indicate that samples prepared from the 4:1:3:6 melts (type 1) have a chemical inhomogeneity, while crystals obtained from the 4:1:3:10 melts (type 2) are high quality. STM studies of the type-1 crystals demonstrate that the inhomogeneities can be associated with distortions in the T1O layer atomic structure. STS measurements on the distorted T1O layer of the type-1 samples have shown that this layer is also metallic. STM and STS investigations of the type-2 samples have shown, however, that the T1O layer in these crystals is tetragonal and semiconducting. In addition, a superstructure that is localized over small regions of the T1O surface has been characterized in the type-1 crystals. These results demonstrate that single crystals of the same average structure and composition can exhibit substantial differences in the local-structure electronic states and superconducting properties. C1 HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138. HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RI Chen, Chia-Chun/F-7939-2012 NR 40 TC 7 Z9 7 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 2 BP 987 EP 992 DI 10.1103/PhysRevB.45.987 PG 6 WC Physics, Condensed Matter SC Physics GA HA074 UT WOS:A1992HA07400051 ER PT J AU ZOU, Z LEVY, JL LAUGHLIN, RB AF ZOU, Z LEVY, JL LAUGHLIN, RB TI MACROSCOPICALLY DOPED CHIRAL-SPIN-LIQUID STATE SO PHYSICAL REVIEW B LA English DT Article ID RESONATING-VALENCE-BOND; FRACTIONAL QUANTUM HALL; LARGE-N LIMIT; T-J MODEL; WAVE-FUNCTIONS; HUBBARD-MODEL; FLUX PHASES; SUPERCONDUCTIVITY; STATISTICS; ANTIFERROMAGNETS AB Our previous work on the isolated charge excitations, holons, of the chiral-spin-liquid state is generalized to include a macroscopic number of holons. We propose a specific class of wave functions for multiholon excitations exhibiting 1/2-fractional statistics. The fractional statistics are demonstrated by means of analytic continuation methods, numerical calculations, and U(1) gauge-theory techniques. A Chern-Simons term is derived in a long-wavelength effective action for the holon holons. The exactness of the fractional statistics follows from the quantization of the coefficient of the Chern-Simons term. This particular class of wave functions seems energetically favorable for the t-J Hamiltonian in the small-doping limit for physical J/t, while in the large-doping limit the stability of these states requires large J/t. An upper bound for the ground-state energy of the t-J Hamiltonian within the fractional-statistics basis set is obtained. C1 STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 45 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 2 BP 993 EP 1012 DI 10.1103/PhysRevB.45.993 PG 20 WC Physics, Condensed Matter SC Physics GA HA074 UT WOS:A1992HA07400052 ER PT J AU ZHANG, SW RUNGE, KJ AF ZHANG, SW RUNGE, KJ TI GREEN-FUNCTION MONTE-CARLO STUDY OF THE 2-DIMENSIONAL, SPIN-1/2 XY FERROMAGNET SO PHYSICAL REVIEW B LA English DT Note ID TRIANGULAR LATTICE; GROUND-STATE; ANTIFERROMAGNET; TEMPERATURE AB The ground states of quantum spin-1/2 XY ferromagnetic triangular and square systems are investigated with the Green's-function Monte Carlo method. Simulations are performed on L x L two-dimensional lattices with L up to 19. The long-range orders as well as ground-state energies are obtained for both lattices and are extrapolated to infinite system size. The long-range order (LRO) is computed directly using kernels from the system Hamiltonian and a "perturbed" Hamiltonian involving the LRO operator. It is seen that LRO exists in the infinite triangular lattice, contrary to conclusions drawn from previous exact-diagonalization studies. The second-order spin-wave theory again appears to yield very good results on these systems. C1 CORNELL UNIV,CTR THEORY & SIMULAT SCI & ENGN,ITHACA,NY 14853. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP ZHANG, SW (reprint author), CORNELL UNIV,ATOM & SOLID STATE PHYS LAB,ITHACA,NY 14853, USA. NR 17 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 1992 VL 45 IS 2 BP 1052 EP 1055 DI 10.1103/PhysRevB.45.1052 PG 4 WC Physics, Condensed Matter SC Physics GA HA074 UT WOS:A1992HA07400064 ER PT J AU GULMEZ, E ADAMS, DL BEEDOE, S BLESZYNSKI, M BYSTRICKY, J GHAZIKHANIAN, V IGO, G JAROSZEWICZ, T LING, AG NASSER, M MCNAUGHTON, MW PENTTILA, S GLASS, G KAHRIMANIS, G KIELHORN, WF MCNAUGHTON, KH RILEY, PJ SEN, S WOLF, D AF GULMEZ, E ADAMS, DL BEEDOE, S BLESZYNSKI, M BYSTRICKY, J GHAZIKHANIAN, V IGO, G JAROSZEWICZ, T LING, AG NASSER, M MCNAUGHTON, MW PENTTILA, S GLASS, G KAHRIMANIS, G KIELHORN, WF MCNAUGHTON, KH RILEY, PJ SEN, S WOLF, D TI ELASTIC-SCATTERING OF N-TYPE, L-TYPE, AND S-TYPE POLARIZED 794 MEV PROTONS FROM AN ND3 TARGET POLARIZED IN THE S-L PLANE SO PHYSICAL REVIEW C LA English DT Article ID SPIN OBSERVABLES; IMPULSE APPROXIMATION; P->D->->P->D AB 23 p-d elastic scattering spin observables, most of them in linear combinations of two observables, were measured at 794 MeV over a range of four-momentum transfer t from -0.257 to -0.630 (GeV/c)2. By changing the beam polarization between S, N, and L type and by alternating the target vector polarization between negative and positive, six independent combinations of beam and target polarization were obtained. The target was dynamically polarized deuterated ammonia. An average target polarization of 30% was achieved. Transverse polarization components of the scattered protons (S and N type) were measured directly by using a polarimeter. The longitudinal polarization component (L type) was measured after precessing it to N type. Typical uncertainties for two-spin coefficients were 0.02 and for three-spin coefficients 0.1-0.2. The data are compared with the theoretical predictions calculated by fitting the previously available data to a relativistic multiple-scattering model with derivative couplings. Although relativistic impulse approximation calculations do not predict the data well, they are also included in the comparisons. C1 KING FAHD UNIV PETR & MINERALS,DHAHRAN 31261,SAUDI ARABIA. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. TEXAS A&M UNIV SYST,COLLEGE STN,TX 77843. UNIV TEXAS,AUSTIN,TX 78712. CENS,F-91191 GIF SUR YVETTE,FRANCE. RP GULMEZ, E (reprint author), UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024, USA. RI Gulmez, Erhan/P-9518-2015 OI Gulmez, Erhan/0000-0002-6353-518X NR 28 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 1992 VL 45 IS 1 BP 22 EP 34 DI 10.1103/PhysRevC.45.22 PG 13 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100006 ER PT J AU GLASS, G BHATIA, TS HIEBERT, JC KENEFICK, RA NATH, S NORTHCLIFFE, LC TIPPENS, WB BARLOW, DB JARMER, JJ SIMMONS, JE JEPPESEN, RH TRIPARD, GE AF GLASS, G BHATIA, TS HIEBERT, JC KENEFICK, RA NATH, S NORTHCLIFFE, LC TIPPENS, WB BARLOW, DB JARMER, JJ SIMMONS, JE JEPPESEN, RH TRIPARD, GE TI MEASUREMENT OF SPIN-CORRELATION PARAMETERS ALL AND ASL IN P-P ELASTIC-SCATTERING FROM 500 MEV TO 800 MEV SO PHYSICAL REVIEW C LA English DT Article ID TOTAL-CROSS-SECTION; GEV-C REGION; ANALYZING POWER; PHASE-SHIFTS; ENERGY REGION; MASS RANGE; PP->PP; DEPENDENCE; RESONANCES; DIFFERENCE AB The spin-correlation observable A(LL) for p-p elastic scattering has been measured at energies 589, 640, 692, 743, and 793 MeV, over a c.m. angular range between 20-degrees and 100-degrees. The spin observable A(SL) was also measured in this angular range at energies 640 and 793 MeV. At 488 MeV both the spin observables were measured, but only near the c.m. angle of 90-degrees. The data are compared with the predictions of several phase-shift analyses and previous measurements. The energy dependence of A(LL) for the c.m. angle of 90-degrees is also presented and shows no anomalous behavior. These data provide better angular coverage over five of the energies, with comparable or better statistical precision, than previous measurements of A(LL). C1 NORTHWESTERN UNIV,EVANSTON,IL 60201. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV MONTANA,MISSOULA,MT 59812. WASHINGTON STATE UNIV,PULLMAN,WA 99164. RP GLASS, G (reprint author), TEXAS A&M UNIV SYST,COLLEGE STN,TX 77843, USA. NR 35 TC 9 Z9 9 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 JAN PY 1992 VL 45 IS 1 BP 35 EP 41 DI 10.1103/PhysRevC.45.35 PG 7 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100007 ER PT J AU ZUBANOV, D THOMPSON, MN BERMAN, BL JURY, JW PYWELL, RE MCNEILL, KG AF ZUBANOV, D THOMPSON, MN BERMAN, BL JURY, JW PYWELL, RE MCNEILL, KG TI GIANT-DIPOLE RESONANCE IN O-17 OBSERVED WITH THE (GAMMA,P) REACTION SO PHYSICAL REVIEW C LA English DT Article ID NEUTRON CROSS-SECTIONS; HIGH-RESOLUTION E,E'; PARTICLE-HOLE DESCRIPTION; OXYGEN ISOTOPES; M2 TRANSITIONS; LIGHT-NUCLEI; ISOVECTOR M1; ELECTRON-SCATTERING; ISOSPIN; STATE AB The giant dipole resonance (GDR) in O-17 has been studied with the reaction O-17(gamma,p)N-16 from E(gamma) = 13.50 to 43.15 MeV using quasimonoenergetic photons. The measured cross section shows major peaks at 15.1, 18.1, 19.3, 20.3, 22.2, 23.1, 24.4, and approximately 26.5 MeV. The intermediate structure in the main GDR region is remarkably similar to that observed in O-16, indicating that the valence neutron outside the doubly magic O-16 core perturbs the core-excited states minimally, in support of the weak-coupling hypothesis. We correlate the trends in GDR structure of O-16, O-17, O-18 with changes in ground-state properties related to static deformation. The (gamma,p) reaction selects strength predominantly from two-particle-one-hole configurations formed via E1 transitions from the 1p1/2 subshell; comparison with other reactions (photoneutron and radiative capture) provides information on the microscopic structure of E1 states. The peak observed near threshold at 15.1 MeV is remarkably strong; we infer that it originates from photoexcitation of a few narrow T = 3/2 states and that M1 transitions contribute to the measured strength. The total absorption cross section is approximated by summing the (gamma,p) cross section and the previously published photoneutron cross section; comparison with particle-hole shell-model calculations shows that the main cross-section features, including isospin distribution, are well predicted. Evidence is found for isospin splitting in O-17. Systematics of the integrated cross sections for the carbon, nitrogen, and oxygen isotopes are delineated. C1 GEORGE WASHINGTON UNIV,DEPT PHYS,CTR NUCL STUDIES,WASHINGTON,DC 20052. TRENT UNIV,DEPT PHYS,PETERBOROUGH K9J 7B8,ONTARIO,CANADA. UNIV SASKATCHEWAN,ACCELERATOR LAB,SASKATOON S7N 0W0,SASKATCHEWAN,CANADA. UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP ZUBANOV, D (reprint author), UNIV MELBOURNE,SCH PHYS,PARKVILLE,VIC 3052,AUSTRALIA. NR 88 TC 6 Z9 6 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 1992 VL 45 IS 1 BP 174 EP 196 DI 10.1103/PhysRevC.45.174 PG 23 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100018 ER PT J AU MEYER, M REDON, N QUENTIN, P LIBERT, J AF MEYER, M REDON, N QUENTIN, P LIBERT, J TI SUPERDEFORMED SINGLE-PARTICLE ORBITALS IN THE A = 190 REGION FROM HARTREE-FOCK PLUS BCS CALCULATIONS SO PHYSICAL REVIEW C LA English DT Article ID SELF-CONSISTENT DESCRIPTION; EVEN-EVEN NUCLEI; SPECTROSCOPIC PROPERTIES; SHAPE ISOMERISM; ODD NUCLEI; BANDS; SPIN; SYMMETRY; PU-239 AB Self-consistent axial Hartree-Fock plus BCS calculations have been performed in order to analyze the superdeformed single-particle orbitals near the chemical potentials in Hg and Pb nuclei. The influence of an approximate restoration of the particle-number symmetry is investigated. A discussion of available data is made, taking stock of our results, in the framework of the strong coupling model. C1 INST NATL PHYS NUCL & PHYS PARTICULES,CNRS,CTR SPECT NUCL & SPECTR MASSE,F-91405 ORSAY,FRANCE. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94550. UNIV LYON 1,INST NATL PHYS NUCL & PHYS PARTICULES,F-69622 VILLEURBANNE,FRANCE. RP MEYER, M (reprint author), UNIV LYON 1,INST PHYS NUCL LYON,43 BLVD DU 11 NOV 1918,F-69622 VILLEURBANNE,FRANCE. NR 52 TC 27 Z9 27 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 JAN PY 1992 VL 45 IS 1 BP 233 EP 241 DI 10.1103/PhysRevC.45.233 PG 9 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100023 ER PT J AU BARLOW, DB NEFKENS, BMK PILLAI, C PRICE, JW SLAUS, I WANG, MJ WIGHTMAN, JA JONES, KW LEITCH, MJ MISHRA, CS MORRIS, CL PENG, JC TENG, PK TINSLEY, JM AF BARLOW, DB NEFKENS, BMK PILLAI, C PRICE, JW SLAUS, I WANG, MJ WIGHTMAN, JA JONES, KW LEITCH, MJ MISHRA, CS MORRIS, CL PENG, JC TENG, PK TINSLEY, JM TI HE-3 AND HE-4 PRODUCTION BY 800 MEV PROTONS FROM C-12, TI, AND PB AT FORWARD ANGLES SO PHYSICAL REVIEW C LA English DT Article ID FRAGMENT PRODUCTION; INTERMEDIATE ENERGIES; SPECTRA AB The doubly differential cross section for the production of He-3 and He-4 by 800 MeV protons from C-12, Ti, and Pb has been measured at laboratory angles of 6-degrees and 15-degrees. The momentum of the detected helium nuclei varied from 1 to 2 GeV/c, the maximum being well above the incident proton momentum of 1.46 GeV/c. The cross sections were found to increase with increasing target mass and decrease with increasing momentum and scattering angle. In our momentum region, the He-3 production cross section is 1.5-10 times larger than He-4 depending on the target and the momentum. The data are consistent with the hypothesis that the dominant reaction mechanism is a direct process where the initial nucleon-nucleon scattering is followed by a sequential pickup of neutrons. C1 UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. ARIZONA STATE UNIV,TEMPE,AZ 85281. ACAD SINICA,INST PHYS,NANKANG,TAIWAN. RP BARLOW, DB (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 19 TC 6 Z9 6 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 1992 VL 45 IS 1 BP 293 EP 298 DI 10.1103/PhysRevC.45.293 PG 6 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100029 ER PT J AU BEAVIS, D BOCK, R BROCKMANN, R DANIELEWICZ, P FUNG, SY HARRIS, JW KEANE, D LIU, YM ODYNIEC, G PUGH, HG RENFORDT, RE SANDOVAL, A SCHALL, D SCHROEDER, LS STOCK, R STROBELE, H VIENT, MA AF BEAVIS, D BOCK, R BROCKMANN, R DANIELEWICZ, P FUNG, SY HARRIS, JW KEANE, D LIU, YM ODYNIEC, G PUGH, HG RENFORDT, RE SANDOVAL, A SCHALL, D SCHROEDER, LS STOCK, R STROBELE, H VIENT, MA TI COLLECTIVE MOTION IN AR+PB COLLISIONS AT BEAM ENERGIES BETWEEN 400 AND 1800 MEV NUCLEON SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; STOPPING POWER; FLOW; MATTER; PION AB The energy dependence of rapidity distributions and flow effects was studied in central Ar + Pb collisions at 400, 800, and 1800 MeV/nucleon using a streamer chamber. Rapidity distributions for protons and pions are found to have a Gaussian shape whereas those for deuterons exhibit a two-peak structure at the two higher energies. The average in-plane transverse momentum per nucleon and per event shows saturation of flow around 800 MeV/nucleon for this asymmetric system. The aspect ratio of the sphericity tensor is closely correlated with the flow angle. This correlation appears to be independent of beam energy. The number of participating nucleons in central collisions varies from 213 at 400 to 135 at 1800 MeV/nucleon indicating that at the lowest energy almost the entire target nucleus participates in the collision. C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. GESELL SCHWERIONENFORSCH GMBH,W-6100 DARMSTADT,GERMANY. MICHIGAN STATE UNIV,NATL SUPERCOND CYCLOTRON LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. KENT STATE UNIV,DEPT PHYS,KENT,OH 44242. UNIV FRANKFURT,FACHBEREICH PHYS,W-6000 FRANKFURT,GERMANY. NR 29 TC 18 Z9 18 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 JAN PY 1992 VL 45 IS 1 BP 299 EP 307 DI 10.1103/PhysRevC.45.299 PG 9 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100030 ER PT J AU LYNDON, CR FUNSTEN, HO PERDRISAT, CF PUNJABI, V FINN, JM LIEB, BJ STRONACH, CE FUQUA, NL PLENDL, HS MACKENZIE, JR NAIR, R COMFORT, JR GIANNELLI, RA REIDY, JJ REDMOND, L KOEHLER, PE WENDER, SA AF LYNDON, CR FUNSTEN, HO PERDRISAT, CF PUNJABI, V FINN, JM LIEB, BJ STRONACH, CE FUQUA, NL PLENDL, HS MACKENZIE, JR NAIR, R COMFORT, JR GIANNELLI, RA REIDY, JJ REDMOND, L KOEHLER, PE WENDER, SA TI COINCIDENCE ANALYZING-POWER MEASUREMENTS OF THE REACTION C-12(P-],P'GAMMA)C-12-STAR THROUGH THE 15.11-MEV STATE SO PHYSICAL REVIEW C LA English DT Article ID RELATIVISTIC IMPULSE APPROXIMATION; INELASTIC-SCATTERING; C-12; OBSERVABLES; PROTONS; 400-MEV AB Coincidence analyzing-power measurements or asymmetries A(x)coinc, A(y)coinc, and A(z)coinc are presented for the C-12(p over arrow pointing right, p'gamma)C-12(*) 15.11 MeV) reaction. A polarized proton beam at 318 MeV was used and data were obtained for three mutually perpendicular directions of polarization. A scintillator hodoscope was used for detecting scattered protons and four BGO detectors for the 15.11-MeV gamma-rays. Data are presented for eight azimuthal directions of the scattered protons around the beam direction, and for the polar angles averaged between 3.3-degrees and 11.2-degrees. The data are compared with both nonrelativistic and relativistic calculations. The average size of the asymmetries measured is somewhat less than both predictions and the results do not agree clearly with either prediction. C1 GEORGE MASON UNIV,DEPT PHYS,FAIRFAX,VA 22030. VIRGINIA STATE UNIV,DEPT PHYS,PETERSBURG,VA 23803. FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306. ARIZONA STATE UNIV,DEPT PHYS,TEMPE,AZ 85287. UNIV MISSISSIPPI,DEPT PHYS,UNIVERSITY,MS 38677. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP LYNDON, CR (reprint author), COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23185, USA. NR 20 TC 3 Z9 3 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 JAN PY 1992 VL 45 IS 1 BP 308 EP 316 DI 10.1103/PhysRevC.45.308 PG 9 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100031 ER PT J AU MEDEIROS, ED RANDRUP, J AF MEDEIROS, ED RANDRUP, J TI THERMOSTATIC PROPERTIES OF SEYLER-BLANCHARD NUCLEI SO PHYSICAL REVIEW C LA English DT Article AB Employing a recently developed semiclassical nuclear model, based on a modified Seyler-Blanchard interaction depending on both momentum and density, we consider the thermostatic properties of hot isosymmetric nuclei embedded in a nucleon vapor. The level-density parameter is calculated and discussed. Simple analytical expansions are obtained for the dependence of the level-density parameter and the free energy on nuclear mass number and the temperature of the surrounding vapor. The model is employed for an illustrative study of the symmetric breakup of Sn-120 into a number of equal fragments. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP MEDEIROS, ED (reprint author), CONSELHO NACL DESENVOLVIMENTO CIENT & TECHNOL,CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO DE JANEIRO,BRAZIL. NR 11 TC 13 Z9 13 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 JAN PY 1992 VL 45 IS 1 BP 372 EP 381 DI 10.1103/PhysRevC.45.372 PG 10 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100039 ER PT J AU DEAN, DJ UMAR, AS WU, JS STRAYER, MR AF DEAN, DJ UMAR, AS WU, JS STRAYER, MR TI DYNAMIC STRING-PARTON MODEL FOR RELATIVISTIC HEAVY-ION COLLISIONS SO PHYSICAL REVIEW C LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; CENTRAL RAPIDITY REGION; LATTICE GAUGE-THEORY; FLUX-TUBE MODEL; CHIRAL PHASE-TRANSITION; MESON-MESON SCATTERING; FINITE-SIZE TEST; 3 LIGHT QUARKS; HADRON-PRODUCTION; QUANTUM CHROMODYNAMICS AB We introduce a dynamical model for the description of hadron-hadron collisions at relativistic energies. The model is based on classical Nambu-Goto strings. The string motion is performed in unrestricted four-dimensional space-time. The string end points are interpreted as partons which carry energy and momentum. We study e+e-, e-p, and p-p collisions at various center-of-mass energies. The three basic features of our model are as follows. An ensemble of strings with different end-point dynamics is used to approximately reproduce the valence quark structure functions. We introduce an adiabatic hadronization mechanism for string breakup via qqBAR pair production. The interaction between strings is formulated in terms of a quark-quark scattering amplitude and exchange. C1 VANDERBILT UNIV, DEPT PHYS & ASTRON, NASHVILLE, TN 37235 USA. RP OAK RIDGE NATL LAB, DIV PHYS, CTR COMPUTATIONALLY INTENS PHYS, OAK RIDGE, TN 37831 USA. RI Umar, Ahmet/J-4125-2013; OI Umar, Ahmet/0000-0002-9267-5253; Dean, David/0000-0002-5688-703X NR 98 TC 10 Z9 10 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 1992 VL 45 IS 1 BP 400 EP 414 DI 10.1103/PhysRevC.45.400 PG 15 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100043 ER PT J AU WARBURTON, EK AF WARBURTON, EK TI 2ND-FORBIDDEN UNIQUE BETA-DECAYS OF BE-10, NA-22, AND AL-26 SO PHYSICAL REVIEW C LA English DT Note ID SHELL-MODEL; POLARIZATION AB A shell-model study is made of second-forbidden unique beta-decay of Be-10, Na-22, and Al-26. Calculations were made with a p-shell interaction for Be-10 and the sd-shell interaction of Wildenthal for Na-22 and Al-26. The resulting second-forbidden unique matrix elements are consistently larger than experiment. The ratio is discussed in terms of two effects: the 'collective suppression" discussed in 1970 by Warburton, Garvey, and Towner and in-medium quenching of the spin operator. Comparison is made to similar effects for M3 transitions. RP WARBURTON, EK (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 25 TC 9 Z9 9 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 1992 VL 45 IS 1 BP 463 EP 466 DI 10.1103/PhysRevC.45.463 PG 4 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100052 ER PT J AU MILLENER, DJ HAYES, AC STROTTMAN, D AF MILLENER, DJ HAYES, AC STROTTMAN, D TI P-SHELL NUCLEI IN A (0+2)H-OMEGA MODEL SPACE .1. METHOD AND ON P-SHELL NUCLEI IN A (0+2)H-OMEGA MODEL SPACE .2. RESULTS - COMMENT SO PHYSICAL REVIEW C LA English DT Note ID CLUSTER-COUPLING MODEL; T=0 STATES; O-16; DECAY AB We point out that the shell-model calculations of Wolters, van Hees, and Glaudemans for the p-shell nuclei in a (0 + 2)H-omega-BAR basis have several serious consistency problems, and we use the case of O-16 to illustrate these problems. We discuss some limitations of the parametrization used for the effective interaction, criticize the choice of experimental data used in the least-squares fit, and demonstrate that the resultant interaction exhibits some peculiar features which make it differ considerably from realistic interactions. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP MILLENER, DJ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 23 TC 19 Z9 19 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 JAN PY 1992 VL 45 IS 1 BP 473 EP 476 DI 10.1103/PhysRevC.45.473 PG 4 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100055 ER PT J AU CHOU, WT CASTEN, RF VONBRENTANO, P AF CHOU, WT CASTEN, RF VONBRENTANO, P TI LINKAGE BETWEEN BETA AND GAMMA VIBRATIONAL EXCITATIONS IN DEFORMED-NUCLEI SO PHYSICAL REVIEW C LA English DT Note ID INTERACTING BOSON APPROXIMATION; NUMBER AB The consistent Q formalism of the interacting boson model (IBA) is systematically confronted with data on deformed vibrational states and found to be empirically supported. Exploiting this, we test a central IBA prediction, which is in stark contrast with traditional models, of an inherent linkage between the properties of the beta and gamma-vibrations, and find this linkage to be confirmed by the data. C1 CLARK UNIV,WORCESTER,MA 01610. UNIV COLOGNE,INST KERNPHYS,W-5000 COLOGNE 41,GERMANY. RP CHOU, WT (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 10 TC 7 Z9 7 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 1992 VL 45 IS 1 BP R9 EP R12 DI 10.1103/PhysRevC.45.R9 PG 4 WC Physics, Nuclear SC Physics GA HB431 UT WOS:A1992HB43100003 ER PT J AU MORSE, WM LEIPUNER, LB LARSEN, RC JASTRZEMBSKI, E ADAIR, RK GREENLEE, HB KASHA, H MANNELLI, EB OHL, KE SCHMIDT, MP VAGINS, MR SCHWARZ, CB AF MORSE, WM LEIPUNER, LB LARSEN, RC JASTRZEMBSKI, E ADAIR, RK GREENLEE, HB KASHA, H MANNELLI, EB OHL, KE SCHMIDT, MP VAGINS, MR SCHWARZ, CB TI OBSERVATION OF THE DECAY MODE K0(L)-]GAMMA-GAMMA-EE SO PHYSICAL REVIEW D LA English DT Article AB Results of a search for the decay mode K(L)0 --> gamma-gamma-ee (K(L)0 --> gamma-ee with a hard internal bremsstrahlung) are reported. The measured branching ratio is (6.6 +/- 3.2) x 10(-7), in agreement with the QED prediction of 5.8 x 10(-7). The infrared cutoff for both branching ratios is the requirement that both photons have an energy of at least 5 MeV on the center of mass. C1 YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. VASSAR COLL,DEPT PHYS & ASTRON,POUGHKEEPSIE,NY 12601. RP MORSE, WM (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 6 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 36 EP 41 DI 10.1103/PhysRevD.45.36 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100007 ER PT J AU RIZZO, TG AF RIZZO, TG TI SCALAR DILEPTON PRODUCTION AT TEV E+E- COLLIDERS SO PHYSICAL REVIEW D LA English DT Article ID DOUBLY CHARGED HIGGS; NUMBER-VIOLATING PROCESSES; SU(15) GRAND UNIFICATION; LEPTOQUARK PRODUCTION; BOSONS; MODELS; QUARKS; DECAY AB The production of scalar dileptons, both singly and in pairs, at TeV e+e- colliders is examined and compared. We show that, over a wide range of masses and Yukawa couplings, single production of dileptons dominates over that for pairs. With striking decay signatures, the discovery limit for such particles can be close to the collider center-of-mass energy. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP RIZZO, TG (reprint author), UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706, USA. NR 29 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 42 EP 45 DI 10.1103/PhysRevD.45.42 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100008 ER PT J AU RAMSEY, GP SIVERS, D AF RAMSEY, GP SIVERS, D TI SPIN OBSERVABLES FOR NN-]NN AT LARGE MOMENTUM-TRANSFER SO PHYSICAL REVIEW D LA English DT Article ID PERTURBATIVE QUANTUM CHROMODYNAMICS; NUCLEON DISTRIBUTION AMPLITUDES; OPERATOR PRODUCT EXPANSION; LARGE-TRANSVERSE-MOMENTUM; ASYMPTOTIC FORM-FACTORS; HADRONIC WAVE-FUNCTIONS; ELASTIC-SCATTERING; EXCLUSIVE PROCESSES; HARD SCATTERING; SHORT DISTANCES AB We discuss amplitudes for NN --> NN in the hard-scattering regime. Although our starting point is based on perturbative QCD, we do not attempt a full QCD calculation. Instead, the helicity-conserving amplitudes are modeled using a combination of the quark-interchange and the Landshoff mechanisms. The relative normalization of these two sets of amplitudes involves a "form factor" which (in the absence of a complete higher-order calculation) we determine empirically. Helicity-nonconserving amplitudes are then constructed from the helicity-conserving ones based on the application of covariance arguments to the nucleon wave function. At present, this also involves an undetermined constant. Our theoretically motivated amplitudes provide an economical description of a large body of existing data and make some nontrivial predictions. C1 ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439. RP RAMSEY, GP (reprint author), LOYOLA UNIV,DEPT PHYS,CHICAGO,IL 60611, USA. NR 58 TC 21 Z9 21 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 79 EP 91 DI 10.1103/PhysRevD.45.79 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100011 ER PT J AU BAER, H TATA, X WOODSIDE, J AF BAER, H TATA, X WOODSIDE, J TI MULTILEPTON SIGNALS FROM SUPERSYMMETRY AT HADRON SUPERCOLLIDERS SO PHYSICAL REVIEW D LA English DT Article ID FERMILAB TEVATRON COLLIDER; NEUTRAL HIGGS BOSONS; HEAVY-QUARK FUSION; LUND MONTE-CARLO; TOP-QUARK; PP SUPERCOLLIDERS; STABLE PARTICLES; PAIR PRODUCTION; STANDARD MODEL; PPBAR COLLIDER AB We have developed a new event generator SUSYSM to simulate the production of squarks and gluinos at hadron supercolliders including all the cascade decays as given by the minimal supersymmetric model. The simulation incorporates final-state hadronization and fragmentation effects for the decays of heavy flavors. We have used this to compute the rates for is-not-an-element-of T events, same-sign dilepton events, n(l) = 3, 4, and 5 isolated-lepton events, and single or double Z0 + is-not-an-element-of T events from squark and gluino production at the CERN Large Hadron Collider (LHC) and the Superconducting Super Collider (SSC) for cuts inspired by the Solenoidal Detector Collaboration. We have identified and estimated several backgrounds to the various event topologies and shown that it should be possible to extract signals in several channels both at the LHC and SSC. We have shown that after accumulating one year's worth of design luminosity, it should be possible to identify a gluino with mass up to 2 TeV at the SSC, while the corresponding reach of the LHC is 1.2-1.7 TeV, depending on the luminosity. C1 UNIV HAWAII,DEPT PHYS & ASTRON,HONOLULU,HI 96822. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP BAER, H (reprint author), FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306, USA. NR 82 TC 84 Z9 84 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 142 EP 160 DI 10.1103/PhysRevD.45.142 PG 19 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100016 ER PT J AU HEWETT, JL RIZZO, TG AF HEWETT, JL RIZZO, TG TI IDENTIFYING THE ORIGIN OF NEW GAUGE BOSONS AT THE SUPERCONDUCTING SUPER COLLIDER SO PHYSICAL REVIEW D LA English DT Article ID LEFT-RIGHT MODEL; HADRON COLLIDERS; VECTOR BOSONS; Z-PEAK; FERMION PRODUCTION; STANDARD MODEL; E+E-COLLIDERS; E6 MODELS; PHENOMENOLOGY; SCATTERING AB We examine the ability of the detector of the Solenoidal Detector Collaboration (SDC) to identify the origin of a new neutral gauge boson Z2 in the TeV mass range at the Superconducting Super Collider. Specifically, given the measurements of the Z2 production cross section, width, and leptonic forward-backward asymmetry, together with their associated statistical and systematic errors, we address two related questions: (i) For two different extended electroweak models, up to what mass can their corresponding Z2 bosons be distinguished, and (ii) how well can the Z2 couplings be determined? Our calculations include O(alpha(s)2) QCD, as well as oblique electroweak radiative corrections to the above quantities, and allow for uncertainties due to structure functions, detector efficiencies, lepton identification, luminosity measurement errors, and finite lepton-pair mass resolution, using the specifications of the SDC detector. Nine distinct classes of extended electroweak models are investigated and results are obtained for integrated luminosities of 10(4) and 10(5) pb-1. C1 UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. NR 106 TC 27 Z9 27 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 161 EP 173 DI 10.1103/PhysRevD.45.161 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100017 ER PT J AU CHOUDHURY, D INDUMATI, D SONI, A SANKAR, SU AF CHOUDHURY, D INDUMATI, D SONI, A SANKAR, SU TI MEASURING [VUB] VIA NONLEPTONIC DECAYS OF B-MESONS SO PHYSICAL REVIEW D LA English DT Article ID NON-LEPTONIC DECAYS; DS-MESONS; SEMILEPTONIC DECAYS; 4-FERMION OPERATORS; ABSOLUTE-VALUE; CHARM DECAYS; HEAVY MESONS; WEAK DECAYS; LATTICE; EXTRACTION AB We discuss the possibility of measuring V(ub) via nonleptonic decays of B mesons to exclusive two-meson final states by choosing modes that are theoretically "clean." These clean final states are chosen by requiring that no qqBAR of the same flavor should occur in them. The above requirement automatically leads to decays that proceed only via the spectator graphs in the decays of b, c, and s flavored mesons. These modes may offer a good handle on V(ub), at a level comparable to that given by the exclusive semileptonic modes. C1 INST MATH SCI,MADRAS 600113,INDIA. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. RP CHOUDHURY, D (reprint author), PHYS RES LAB,AHMEDABAD 380009,GUJARAT,INDIA. NR 35 TC 16 Z9 16 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 217 EP 222 DI 10.1103/PhysRevD.45.217 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100022 ER PT J AU ATWOOD, D DEY, M SONI, A VOLKOVITSKY, P AF ATWOOD, D DEY, M SONI, A VOLKOVITSKY, P TI EXAMINATION OF NON-BBBAR DECAYS OF THE UPSILON(4S) IN HYBRID MODELS SO PHYSICAL REVIEW D LA English DT Article ID CHARMONIUM DECAYS; DDBAR THRESHOLD; FINAL-STATES; OZI RULE; QCD; UPSILON-(4S); GAMMA(4S); MESONS AB The large rate for the Zweig-rule-suppressed decay UPSILON(4S) --> psi + X with a high momentum psi is discussed and models are considered in which bbBAR annihilation occurs in a color-octet state. Our main findings are the following. (1) The central value of the observed CLEO rate is difficult to account for in all such models. (2) Among these models, only those in which the bbBAR (octet) is in a total spin-0 state seem to be the least inconsistent with the observed rate. (3) The spin-0 state yields a hard photon with a relatively high branching ratio which is on the verge of being ruled out by a CUSB measurement. The implications of these models for eta(c), DDBAR, phi, and photonic final states are given. The possibility of distinguishing among the contributions of spin-1 and spin-0 color octets is also discussed. C1 LADY BRABOUNE COLL,CALCUTTA,INDIA. MOSCOW THEORET & EXPTL PHYS INST,MOSCOW 117259,USSR. RP ATWOOD, D (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 21 TC 1 Z9 1 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 223 EP 231 DI 10.1103/PhysRevD.45.223 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100023 ER PT J AU ACKLEH, ES BARNES, T AF ACKLEH, ES BARNES, T TI 2-PHOTON WIDTH OF SINGLET POSITRONIUM AND QUARKONIUM WITH ARBITRARY TOTAL ANGULAR-MOMENTUM SO PHYSICAL REVIEW D LA English DT Article ID MESONS; RESONANCES; DECAYS; STATES; MODEL AB In this paper we derive GAMMA(gamma-gamma) for S = 0 positronium and quarkonium states with all allowed quantum numbers (J(PC) = 0- +,2- +,4- +, . . .), in both nonrelativistic and relativistic regimes. gamma-gamma-partial widths have previously been published only for fermion-antifermion states with J(PC) = 0+/- +,1+ + (off-shell photons), and 2+/- +. The topic of higher-spin gamma-gamma-partial widths is of current interest in part because a recent nonrelativistic qqBAR calculation for 2- + finds a much smaller gamma-gamma-partial width than the almost-equal-to 1 keV observed for the I = 1, J(PC) = 2- + state pi(2)(1670). We find very large relativistic corrections to the nonrelativistic (contact) approximation for this width as well as large systematic uncertainties in the procedure used to incorporate the physical resonance mass. Our relativistic qqBAR estimate for GAMMA(gamma-gamma)(pi(2)(1670)) is 0.1-0.3 keV, which is somewhat smaller than the experimental value. This discrepancy may only reflect inaccuracies in the theoretical technique. Finally, we quote relativistic numerical results for the gamma-gamma-widths of various 0- +,2- +, and 4- + (uuBAR-ddBAR)/square-root2, ccBAR and bbBAR states in a Coulomb-plus-linear potential model. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,CTR COMPUTATIONALLY INTENS PHYS,OAK RIDGE,TN 37831. RP ACKLEH, ES (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 32 TC 66 Z9 66 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 1992 VL 45 IS 1 BP 232 EP 240 DI 10.1103/PhysRevD.45.232 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA GX511 UT WOS:A1992GX51100024 ER PT B AU HSUEH, SY AF HSUEH, SY BE AMSLER, C URNER, D TI THE FERMILAB (P)BAR ACCUMULATOR RING FOR THE CHARMONIUM EXPERIMENT SO PHYSICS AT SUPERLEAR SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Proceedings Paper CT SUPERLEAR WORKSHOP CY OCT 09-12, 1991 CL UNIV ZURICH, PHYS INST, ZURICH, SWITZERLAND SP PHYS INST, SWISS NATL SCI FDN HO UNIV ZURICH, PHYS INST RP HSUEH, SY (reprint author), FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA BRISTOL BN 0-85498-414-3 J9 INST PHYS CONF SER PY 1992 VL 124 BP 105 EP 110 PG 6 WC Physics, Nuclear; Physics, Particles & Fields; Statistics & Probability SC Physics; Mathematics GA BW16Z UT WOS:A1992BW16Z00012 ER PT B AU CHUNG, SU AF CHUNG, SU BE AMSLER, C URNER, D TI CURRENT STATUS OF THE E(1420)/L(1440) AND FUTURE-PROSPECTS OF THE GT DECAYING INTO PHI-PHI SO PHYSICS AT SUPERLEAR SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Proceedings Paper CT SUPERLEAR WORKSHOP CY OCT 09-12, 1991 CL UNIV ZURICH, PHYS INST, ZURICH, SWITZERLAND SP PHYS INST, SWISS NATL SCI FDN HO UNIV ZURICH, PHYS INST RP CHUNG, SU (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA BRISTOL BN 0-85498-414-3 J9 INST PHYS CONF SER PY 1992 VL 124 BP 373 EP 383 PG 11 WC Physics, Nuclear; Physics, Particles & Fields; Statistics & Probability SC Physics; Mathematics GA BW16Z UT WOS:A1992BW16Z00044 ER PT B AU DOVER, CB AF DOVER, CB BE AMSLER, C URNER, D TI PHYSICS AT SUPERLEAR - WORKSHOP SUMMARY SO PHYSICS AT SUPERLEAR SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Proceedings Paper CT SUPERLEAR WORKSHOP CY OCT 09-12, 1991 CL UNIV ZURICH, PHYS INST, ZURICH, SWITZERLAND SP PHYS INST, SWISS NATL SCI FDN HO UNIV ZURICH, PHYS INST RP DOVER, CB (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA BRISTOL BN 0-85498-414-3 J9 INST PHYS CONF SER PY 1992 VL 124 BP 421 EP 438 PG 18 WC Physics, Nuclear; Physics, Particles & Fields; Statistics & Probability SC Physics; Mathematics GA BW16Z UT WOS:A1992BW16Z00049 ER PT J AU PHILLIPS, RJ ARMSTRONG, RC BROWN, RA GRAHAM, AL ABBOTT, JR AF PHILLIPS, RJ ARMSTRONG, RC BROWN, RA GRAHAM, AL ABBOTT, JR TI A CONSTITUTIVE EQUATION FOR CONCENTRATED SUSPENSIONS THAT ACCOUNTS FOR SHEAR-INDUCED PARTICLE MIGRATION SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID SELF-DIFFUSION; SPHERES; CAPILLARY; FLOWS AB A constitutive equation for computing particle concentration and velocity fields in concentrated monomodal suspensions is proposed that consists of two parts: a Newtonian constitutive equation in which the viscosity depends on the local particle volume fraction and a diffusion equation that accounts for shear-induced particle migration. Particle flux expressions used to obtain the diffusion equation are derived by simple scaling arguments. Predictions are made for the particle volume fraction and velocity fields for steady Couette and Poiseuille flow, and for transient start-up of steady shear flow in a Couette apparatus. Particle concentrations for a monomodal suspension of polymethyl methacrylate spheres in a Newtonian solvent are measured by nuclear magnetic resonance (NMR) imaging in the Couette geometry for two particle sizes and volume fractions. The predictions agree remarkably well with the measurements for both transient and steady-state experiments as well as for different particle sizes. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP PHILLIPS, RJ (reprint author), MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139, USA. NR 18 TC 505 Z9 509 U1 4 U2 57 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD JAN PY 1992 VL 4 IS 1 BP 30 EP 40 DI 10.1063/1.858498 PG 11 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA GX510 UT WOS:A1992GX51000004 ER PT J AU WARE, AS DIAMOND, PH CARRERAS, BA LEBOEUF, JN LEE, DK AF WARE, AS DIAMOND, PH CARRERAS, BA LEBOEUF, JN LEE, DK TI THEORY OF DRIFT-THERMAL INSTABILITY-INDUCED TURBULENCE SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID GRADIENT-DRIVEN TURBULENCE; TOKAMAK EDGE PLASMA; TEXT TOKAMAK; TRANSPORT AB A simple model for drift-thermal instability-induced turbulence is derived and studied both analytically and numerically. Both nonlocal, nonlinear analytical calculations and three-dimensional computations are used. Potential and temperature fluctuation levels and radial correlation lengths are calculated and compared to numerical results. The saturation mechanism and the role of a fluctuation-generated shear flow are elucidated. The numerical calculations are used to obtain spectra and correlation lengths. A detailed comparison of analytical and numerical results is given. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. GEN ATOM CO,LA JOLLA,CA 92186. RP WARE, AS (reprint author), UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093, USA. NR 30 TC 34 Z9 34 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD JAN PY 1992 VL 4 IS 1 BP 102 EP 116 DI 10.1063/1.860449 PG 15 WC Physics, Fluids & Plasmas SC Physics GA GX513 UT WOS:A1992GX51300015 ER PT J AU SHAING, KC AF SHAING, KC TI ION ORBIT LOSS AND POLOIDAL PLASMA ROTATION IN TOKAMAKS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID L-H TRANSITION; NONAXISYMMETRIC TOROIDAL PLASMAS; EDGE ELECTRIC-FIELD; TRANSPORT; FLOWS; BIFURCATION; PARALLEL; PARTICLE; REGIME; MODEL AB A momentum balance equation including the effect of ion orbit loss is employed to discuss the poloidal plasma rotation in tokamaks. It is found that in a steady state, the high-energy collisionless ions leave the system through an ion orbit loss mechanism and the low-energy collisional ions convect into the system as viscosity-driven flux in such a way that there is no net flux-surface-averaged radial current across the flux surface. The value of poloidal rotation necessary to maintain steady-state ambipolarity is different from that of the conventional neoclassical theory. This confirms the previous results [Phys. Rev. Lett. 63, 2369 (1989)]. It is also shown, by considering the effects of incompressible flow in the phase space described by the orbit-averaged Coulomb collision operator, that the ion orbit loss flux is intimately related to the plasma viscosity. RP SHAING, KC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 24 TC 33 Z9 33 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD JAN PY 1992 VL 4 IS 1 BP 171 EP 175 DI 10.1063/1.860430 PG 5 WC Physics, Fluids & Plasmas SC Physics GA GX513 UT WOS:A1992GX51300022 ER PT J AU DUBOIS, DF BEZZERIDES, B ROSE, HA AF DUBOIS, DF BEZZERIDES, B ROSE, HA TI COLLECTIVE PARAMETRIC-INSTABILITIES OF MANY OVERLAPPING LASER-BEAMS WITH FINITE BANDWIDTH SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article AB A class of collective three-wave parametric instabilities resulting from the overlap of N, phase-independent, converging laser beams, each with finite frequency bandwidth and modest spatial incoherence is considered. A statistical analysis is employed based on the random phase approximation (RPA) to derive the thresholds, growth rates, and spatial gain coefficients for these instabilities. When the laser beams are symmetrically distributed in a converging conical array it is argued that collective parametric instabilities can be excited in which one of the daughter waves propagates along the symmetry axis of the cone and is coupled equally to all the pump beams and to the other daughter waves that lie in another cone determined by the matching conditions. For a sufficiently large number of beams the collective modes have lower thresholds than the single-beam instabilities. The collective thresholds are greater than or equal to the incoherent thresholds for a single beam containing N times the single-beam power. To be effective the spatial extent of the beam overlap region must be long enough to allow significant convective amplification or absolute instability. A potentially dangerous collective instability, resulting from stimulated Raman scattering (SRS), has a common electron plasma wave along the axis of symmetry and has a low threshold for coherent beams. This common plasma wave may be detrimental to laser fusion as a potential source of hot electrons. Sufficient bandwidth and angular divergence of the beams can suppress this instability relative to a more benign collective mode where the scattered light is the common mode along the symmetry axis. RP DUBOIS, DF (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 6 TC 22 Z9 22 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD JAN PY 1992 VL 4 IS 1 BP 241 EP 251 DI 10.1063/1.860439 PG 11 WC Physics, Fluids & Plasmas SC Physics GA GX513 UT WOS:A1992GX51300030 ER PT J AU ROSE, HA DUBOIS, DF AF ROSE, HA DUBOIS, DF TI COLLECTIVE FILAMENTATION IN INDUCED SPATIAL INCOHERENCE AND MULTIPLE LASER-BEAM CONFIGURATIONS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID PLASMA AB The linear stability of a system of multiple overlapping laser beams is analyzed in terms of a linear dispersion relation that is valid with sufficient bandwidth. Each beam may or may not have spatial incoherence. Two beams can always act in concert to produce a linear instability equivalent to that obtained from a single beam with an intensity equal to the sum of the two beam intensities. There is a threshold intensity I(cp) for all beams to produce a collective ponderomotive instability equivalent to that of a single beam with the same total intensity. The collective thermal filamentation threshold, based upon classical transport, is one based on total power P(ct) and it seems to be easily accessible. RP ROSE, HA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 16 TC 11 Z9 11 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD JAN PY 1992 VL 4 IS 1 BP 252 EP 262 DI 10.1063/1.860441 PG 11 WC Physics, Fluids & Plasmas SC Physics GA GX513 UT WOS:A1992GX51300031 ER PT J AU DIMITS, AM LODESTRO, LL DUBIN, DHE AF DIMITS, AM LODESTRO, LL DUBIN, DHE TI GYROAVERAGED EQUATIONS FOR BOTH THE GYROKINETIC AND DRIFT-KINETIC REGIMES SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Note ID PARTICLE SIMULATION; PLASMAS AB The regime of validity of nonlinear gyrokinetic equations is extended to cover uniformly both the usual drift-kinetic and gyrokinetic regimes through the use of an expansion in the parameter epsilon approximately (rho/lambda perpendicular-to)e(phi-upsilon parallel-to A(z)/c)T. Here, rho is the gyroradius lambda perpendicular-to is the scale length of the electrostatic and parallel magnetic potentials rho and A(z), c is the speed of light, and T is the temperature. This is made possible by a preparatory split of the potentials into gyrophase-dependent and independent parts. For nonlinear fluctuations saturated at mixing-length levels (e.g., with e-phi/T approximately lambda perpendicular-to/L, where L is the equilibrium scale length), epsilon is of order rho/L for all scales lambda perpendicular-to ranging from rho to L, and is therefore small in plasmas of fusion interest. C1 UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. RP DIMITS, AM (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 5511,LIVERMORE,CA 94550, USA. NR 14 TC 26 Z9 26 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD JAN PY 1992 VL 4 IS 1 BP 274 EP 277 DI 10.1063/1.860444 PG 4 WC Physics, Fluids & Plasmas SC Physics GA GX513 UT WOS:A1992GX51300034 ER PT B AU WENG, WT MANE, SR AF WENG, WT MANE, SR BE MONTH, M DIENS, M TI FUNDAMENTALS OF PARTICLE BEAM DYNAMICS AND PHASE-SPACE SO PHYSICS OF PARTICLE ACCELERATORS, VOLS 1 AND 2: BASED IN PART ON USPAS SEMINARS AND COURSES IN 1989 AND 1990 SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT SEMINAR COURSES OF THE US PARTICLE ACCELERATOR SCHOOL ON THE PHYSICS OF PARTICLE ACCELERATORS CY 1989 CL BROOKHAVEN NATL LAB, UPTON, NY SP US PARTICLE ACCELERATOR SCHOOL HO BROOKHAVEN NATL LAB RP WENG, WT (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AIP PRESS PI WOODBURY PA WOODBURY BN 0-88318-789-2 J9 AIP CONF PROC PY 1992 VL 249 BP 3 EP 45 PG 43 WC Physics, Particles & Fields SC Physics GA BV75P UT WOS:A1992BV75P00001 ER PT J AU DEARBORN, DSP AF DEARBORN, DSP TI DIAGNOSTICS OF STELLAR EVOLUTION - THE OXYGEN ISOTOPES SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Article ID THERMONUCLEAR REACTION-RATES; RED GIANT STARS; MERIDIONAL CIRCULATION; ROTATING STARS; ASTROPHYSICAL CONSTRAINTS; EVOLVED STARS; CARBON STARS; LITHIUM; CLUSTERS; ABUNDANCES AB The oxygen isotope ratios provide a probe of the physics of stellar interiors. Among the phenomena that can be studied through the oxygen isotope ratios are the maximum depth of penetration of the convective envelopes on the giant branch, the efficiency of nonconvective mixing, as well as restrictions on the mass loss that occurs. The oxygen isotope ratios also provide an indicator of the nuclear processing that occurs during third dredge up and carbon star formation. In addition to the oxygen isotopes, we indicate the expected behavior of nitrogen and the light elements. RP DEARBORN, DSP (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 51 TC 51 Z9 51 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-1573 J9 PHYS REP JI Phys. Rep.-Rev. Sec. Phys. Lett. PD JAN PY 1992 VL 210 IS 6 BP 367 EP 382 DI 10.1016/0370-1573(92)90080-J PG 16 WC Physics, Multidisciplinary SC Physics GA HD159 UT WOS:A1992HD15900001 ER PT J AU CORDEY, JG GOLDSTON, RJ PARKER, RR AF CORDEY, JG GOLDSTON, RJ PARKER, RR TI PROGRESS TOWARD A TOKAMAK FUSION-REACTOR SO PHYSICS TODAY LA English DT Article ID PLASMA-CONFINEMENT; SCALING LAWS; STABILITY; SAFETY; LIMITS C1 PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544. MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139. RP CORDEY, JG (reprint author), JOINT EUROPEAN TORUS,DATA PROC & ANAL,ABINGDON,OXON,ENGLAND. NR 23 TC 29 Z9 29 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 1992 VL 45 IS 1 BP 22 EP 30 PG 9 WC Physics, Multidisciplinary SC Physics GA HA079 UT WOS:A1992HA07900005 ER PT J AU CALLEN, JD CARRERAS, BA STAMBAUGH, RD AF CALLEN, JD CARRERAS, BA STAMBAUGH, RD TI STABILITY AND TRANSPORT PROCESSES IN TOKAMAK PLASMAS SO PHYSICS TODAY LA English DT Article ID GRADIENT-DRIVEN TURBULENCE; L-H TRANSITION; POLOIDAL ROTATION; MHD STABILITY; DOUBLET-III; CONFINEMENT; BETA; EDGE; LIMITS; FIELD C1 OAK RIDGE NATL LAB,DIV FUS ENERGY,OAK RIDGE,TN 37831. GEN ATOM CO,FUS GRP,DIV BOUNDARY PHYS & TECHNOL,SAN DIEGO,CA 92138. RP CALLEN, JD (reprint author), UNIV WISCONSIN,DEPT NUCL ENGN & ENGN PHYS,MADISON,WI 53706, USA. NR 44 TC 22 Z9 22 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 1992 VL 45 IS 1 BP 34 EP 42 DI 10.1063/1.881338 PG 9 WC Physics, Multidisciplinary SC Physics GA HA079 UT WOS:A1992HA07900006 ER PT J AU WEINBERG, AM AF WEINBERG, AM TI YOUNG,GALE,J. - OBITUARY SO PHYSICS TODAY LA English DT Item About an Individual RP WEINBERG, AM (reprint author), OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37830, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 1992 VL 45 IS 1 BP 84 EP 84 DI 10.1063/1.2809507 PG 1 WC Physics, Multidisciplinary SC Physics GA HA079 UT WOS:A1992HA07900014 ER PT J AU MEELEY, RB JOHAL, GS BRIGGS, SP WALTON, JD AF MEELEY, RB JOHAL, GS BRIGGS, SP WALTON, JD TI A BIOCHEMICAL PHENOTYPE FOR A DISEASE RESISTANCE GENE OF MAIZE SO PLANT CELL LA English DT Article ID HOST-SPECIFIC TOXIN; HELMINTHOSPORIUM-CARBONUM; HC-TOXIN AB In maize, major resistance to the pathogenic fungus Cochliobolus (Helminthosporium) carbonum race 1 is determined by the dominant allele of the nuclear locus hm. The interaction between C. carbonum race 1 and maize is mediated by a pathogen-produced, low molecular weight compound called HC-toxin. We recently described an enzyme from maize, called HC-toxin reductase, that inactivates HC-toxin by pyridine nucleotide-dependent reduction of an essential carbonyl group. We now report that this enzyme activity is detectable only in extracts of maize that are resistant to C. carbonum race 1 (genotype Hm/Hm or Hm/hm). In several genetic analyses, in vitro HC-toxin reductase activity was without exception associated with resistance to C. carbonum race 1. The results indicate that detoxification of HC-toxin is the biochemical basis of Hm-specific resistance of maize to infection by C. carbonum race 1. C1 MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. COLD SPRING HARBOR LAB,COLD SPRING HARBOR,NY 11724. RI Johal, Guri/F-5056-2017 OI Johal, Guri/0000-0001-8101-8410 NR 21 TC 80 Z9 83 U1 0 U2 4 PU AMER SOC PLANT PHYSIOLOGISTS PI ROCKVILLE PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 SN 1040-4651 J9 PLANT CELL JI Plant Cell PD JAN PY 1992 VL 4 IS 1 BP 71 EP 77 DI 10.2307/3869383 PG 7 WC Biochemistry & Molecular Biology; Plant Sciences; Cell Biology SC Biochemistry & Molecular Biology; Plant Sciences; Cell Biology GA HC431 UT WOS:A1992HC43100010 ER PT J AU EVANS, RD BLACK, RA LOESCHER, WH FELLOWS, RJ AF EVANS, RD BLACK, RA LOESCHER, WH FELLOWS, RJ TI OSMOTIC RELATIONS OF THE DROUGHT-TOLERANT SHRUB ARTEMISIA-TRIDENTATA IN RESPONSE TO WATER-STRESS SO PLANT CELL AND ENVIRONMENT LA English DT Article DE ARTEMISIA-TRIDENTATA; ASTERACEAE; BIG SAGEBRUSH; COMPATIBLE SOLUTES; DROUGHT TOLERANCE; WATER RELATIONS ID LARREA-TRIDENTATA; CHAPARRAL SHRUBS; DESERT PLANTS; QUERCUS-ALBA; PHOTOSYNTHESIS; DEFICITS; LEAF; ACCUMULATION; ADJUSTMENT; SOLUTES AB Turgor maintenance, solute content and recovery from water stress were examined in the drought-tolerant shrub Artemisia tridentata. Predawn water potentials of shrubs receiving supplemental water remained above -2 MPa throughout summer, while predawn water potentials of untreated shrubs decreased to -5 MPa. Osmotic potentials decreased in conjunction with water potentials maintaining turgor pressures above O MPa. The decreases in osmotic potentials were not the result of osmotic adjustment (i.e. solute accumulation). Leaf solute contents decreased during drought, but leaf water volumes decreased more than 75% from spring to summer, thereby passively concentrating solutes within the leaves. The maintenance of positive turgor pressures despite decreases in leaf water volumes is consistent with other studies of species with elastic cell walls. Inorganic ion, organic acid, and carbohydrate contents of leaves declined during drought. The only solutes accumulating in leaves of A. tridentata with water stress were proline and a cyclitol, both considered compatible solutes. Total and osmotic potentials recovered rapidly following rewatering of shrubs; solute contents did not change except for a decrease in proline. Maintaining turgor through the passive concentration of solutes may be advantageous compared to synthesis of new solutes for osmotic adjustment in arid environments. C1 WASHINGTON STATE UNIV, DEPT BOT, PULLMAN, WA 99164 USA. MICHIGAN STATE UNIV, DEPT HORT, E LANSING, MI 48824 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 47 TC 35 Z9 38 U1 3 U2 36 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0140-7791 J9 PLANT CELL ENVIRON JI Plant Cell Environ. PD JAN PY 1992 VL 15 IS 1 BP 49 EP 59 DI 10.1111/j.1365-3040.1992.tb01457.x PG 11 WC Plant Sciences SC Plant Sciences GA HB652 UT WOS:A1992HB65200006 ER PT J AU MCCUE, KF HANSON, AD AF MCCUE, KF HANSON, AD TI SALT-INDUCIBLE BETAINE ALDEHYDE DEHYDROGENASE FROM SUGAR-BEET - CDNA CLONING AND EXPRESSION SO PLANT MOLECULAR BIOLOGY LA English DT Article DE BETAINE ALDEHYDE DEHYDROGENASE; GENE EXPRESSION; GLYCINE BETAINE; OSMOTIC STRESS; SALT TOLERANCE; SUGAR BEET ID MESSENGER-RNA; SPINACH-CHLOROPLASTS; LEAVES; STRESS; DNA; ACCUMULATION; SALINITY; PROTEIN; CHOLINE; BARLEY AB Members of the Chenopodiaceae, such as sugar beet and spinach, accumulate glycine betaine in response to salinity or drought stress. The last enzyme in the glycine betaine biosynthetic pathway is betaine aldehyde dehydrogenase (BADH). In sugar beet the activity of BADH was found to increase two- to four-fold in both leaves and roots as the NaCl level in the irrigation solution was raised from 0 to 500 mM. This increase in BADH activity was paralleled by an increase in level of translatable BADH mRNA. Several cDNAs encoding BADH were cloned from a lambda-gt 10 library representing poly(A)+ RNA from salinized leaves of sugar beet plants, by hybridization with a spinach BADH cDNA. Three nearly full-length cDNA clones were confirmed to encode BADH by their nucleotide and deduced amino acid sequence identity to spinach BADH; these clones showed minor nucleotide sequence differences consistent with their being of two different BADH alleles. The clones averaged 1.7 kb and contained an open reading frame predicting a polypeptide of 500 amino acids with 83% identity to spinach BADH. RNA gel blot analysis of total RNA showed that salinization to 500 mM NaCl increased BADH mRNA levels four-fold in leaves and three-fold in the taproot. DNA gel blot analyses indicated the presence of at least two copies of BADH in the haploid sugar beet genome. C1 CTR RECH BIOL VEGETALE, MONTREAL H1X 2B2, QUEBEC, CANADA. RP MICHIGAN STATE UNIV, US DOE, PLANT RES LAB, E LANSING, MI 48824 USA. RI McCue, Kent/A-8973-2009 NR 40 TC 124 Z9 170 U1 1 U2 11 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-4412 EI 1573-5028 J9 PLANT MOL BIOL JI Plant Mol.Biol. PD JAN PY 1992 VL 18 IS 1 BP 1 EP 11 DI 10.1007/BF00018451 PG 11 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA HA344 UT WOS:A1992HA34400001 PM 1731961 ER PT J AU AKIMITSU, K HART, LP WALTON, JD HOLLINGSWORTH, R AF AKIMITSU, K HART, LP WALTON, JD HOLLINGSWORTH, R TI COVALENT BINDING-SITES OF VICTORIN IN OAT LEAF TISSUES DETECTED BY ANTI-VICTORIN POLYCLONAL ANTIBODIES SO PLANT PHYSIOLOGY LA English DT Article ID HOST-SELECTIVE TOXINS; COCHLIOBOLUS-VICTORIAE; PROTEIN AB Polyclonal antibodies against victorin, the host-specific toxin produced by Cochliobolus victoriae, were raised in rabbits immunized with a victorin-bovine serum albumin conjugate. The antibodies were purified from serum by protein A column chromatography and characterized by indirect and direct enzyme-linked immunosorbent assays (ELISA). The concentration of victorin that inhibited anti-victorin antibody binding by 50% was 10 nanograms per milliter in an indirect ELISA. The lowest concentration of victorin detectable was 10 picograms per milliliter. In a direct ELISA, 25 nanograms per milliliter of victorin inhibited binding of victorin-horseradish peroxidase conjugate by 50%. In vivo and in vitro covalent binding of victorin to proteins in susceptible and resistant oat (Avena sativa) tissue was examined by western blotting assays using anti-victorin antibody and a second antibody conjugated with I-125 or alkaline phosphatase. In vivo binding of victorin to proteins of 100 and 45 kilodaltons was observed in both susceptible and resistant cultivars of oats. Victorin also bound in vitro to proteins of 100, 65, and 45 kilodaltons in both susceptible and resistant oats. The data indicate that victorin binds covalently to the same sites in susceptible and resistant genotypes of oats. C1 MICHIGAN STATE UNIV,DEPT BOT & PLANT PATHOL,E LANSING,MI 48824. MICHIGAN STATE UNIV,PESTICIDE RES CTR,E LANSING,MI 48824. MICHIGAN STATE UNIV,DOE PLANT RES LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT BIOCHEM,E LANSING,MI 48824. NR 18 TC 18 Z9 20 U1 0 U2 0 PU AMER SOC PLANT PHYSIOLOGISTS PI ROCKVILLE PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 SN 0032-0889 J9 PLANT PHYSIOL JI Plant Physiol. PD JAN PY 1992 VL 98 IS 1 BP 121 EP 126 DI 10.1104/pp.98.1.121 PG 6 WC Plant Sciences SC Plant Sciences GA HC428 UT WOS:A1992HC42800018 PM 16668602 ER PT J AU BROWN, MA WILSON, CR AF BROWN, MA WILSON, CR TI PROMOTING THE COMMERCIALIZATION OF ENERGY INNOVATIONS - AN EVALUATION OF THE ENERGY-RELATED INVENTIONS PROGRAM SO POLICY STUDIES JOURNAL LA English DT Article ID PRODUCT DEVELOPMENT; PERFORMANCE; PATTERNS; CYCLE C1 UNIV TENNESSEE,DEPT GEOG,KNOXVILLE,TN 37996. RP BROWN, MA (reprint author), OAK RIDGE NATL LAB,ENERGY PROGRAM PLANNING & EVALUAT GRP,OAK RIDGE,TN 37831, USA. NR 29 TC 1 Z9 1 U1 1 U2 5 PU POLICY STUDIES ORGANIZATION PI URBANA PA UNIV ILLINOIS 361 LINCOLN HALL, URBANA, IL 61801 SN 0190-292X J9 POLICY STUD J JI Policy Stud. J. PY 1992 VL 20 IS 1 BP 87 EP 101 DI 10.1111/j.1541-0072.1992.tb01444.x PG 15 WC Political Science; Public Administration SC Government & Law; Public Administration GA HG126 UT WOS:A1992HG12600008 ER PT B AU AUSTIN, LR AF AUSTIN, LR BE BREEN, JJ DELLARCO, MJ TI ADVANCED TESTING LINE FOR ACTINIDE SEPARATIONS - AN INTEGRATED APPROACH TO WASTE MINIMIZATION VIA ONLINE AT-LINE PROCESS ANALYTICAL-CHEMISTRY SO POLLUTION PREVENTION IN INDUSTRIAL PROCESSES: THE ROLE OF PROCESS ANALYTICAL CHEMISTRY SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP ON POLLUTION PREVENTION IN INDUSTRIAL PROCESSES, AT THE 201ST NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC CY APR 14-19, 1991 CL ATLANTA, GA SP AMER CHEM SOC, DIV ENVIRONM CHEM RP AUSTIN, LR (reprint author), LOS ALAMOS NATL LAB,POB 1663,MS E-501,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-2478-1 J9 ACS SYM SER PY 1992 VL 508 BP 118 EP 124 PG 7 WC Chemistry, Analytical; Environmental Sciences; Toxicology SC Chemistry; Environmental Sciences & Ecology; Toxicology GA BW92M UT WOS:A1992BW92M00011 ER PT B AU VODINH, T GRIFFIN, GD ALARIE, JP SEPANIAK, MJ BOWYER, JR AF VODINH, T GRIFFIN, GD ALARIE, JP SEPANIAK, MJ BOWYER, JR BE BREEN, JJ DELLARCO, MJ TI DEVELOPMENT OF FIBEROPTIC IMMUNOSENSORS FOR ENVIRONMENTAL-ANALYSIS SO POLLUTION PREVENTION IN INDUSTRIAL PROCESSES: THE ROLE OF PROCESS ANALYTICAL CHEMISTRY SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP ON POLLUTION PREVENTION IN INDUSTRIAL PROCESSES, AT THE 201ST NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC CY APR 14-19, 1991 CL ATLANTA, GA SP AMER CHEM SOC, DIV ENVIRONM CHEM RP VODINH, T (reprint author), OAK RIDGE NATL LAB,ADV MONITORING DEV GRP,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831, USA. NR 0 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-2478-1 J9 ACS SYM SER PY 1992 VL 508 BP 270 EP 283 PG 14 WC Chemistry, Analytical; Environmental Sciences; Toxicology SC Chemistry; Environmental Sciences & Ecology; Toxicology GA BW92M UT WOS:A1992BW92M00022 ER PT J AU CHENG, SZD CHEN, JH ZHANG, AQ BARLEY, JS HABENSCHUSS, A ZSCHACK, PR AF CHENG, SZD CHEN, JH ZHANG, AQ BARLEY, JS HABENSCHUSS, A ZSCHACK, PR TI ISOTHERMAL THICKENING AND THINNING PROCESSES IN LOW-MOLECULAR-WEIGHT POLY(ETHYLENE OXIDE) FRACTIONS CRYSTALLIZED FROM THE MELT .2. CRYSTALS INVOLVING MORE THAN ONE FOLD SO POLYMER LA English DT Article DE CRYSTAL MELTING; CRYSTALLIZATION; FOLD LENGTH; INTEGRAL FOLDING; ISOTHERMAL THICKENING; ISOTHERMAL THINNING; KINETIC EFFECT; MORPHOLOGY; NONINTEGRAL FOLDING; POLY(ETHYLENE OXIDE); THERMODYNAMIC DRIVING FORCE; TIME-RESOLVED SYNCHROTRON SMALL ANGLE X-RAY SCATTERING ID SINGLE-CRYSTALS; LONG PARAFFINS; GROWTH; ONSET AB The existence of a non-integral folding chain (NIF) crystal in a poly(ethylene oxide) fraction with molecular weight of 7100 can be proved by differential scanning calorimetry and time-resolved synchrotron small angle X-ray scattering experiments. At this molecular weight, the fraction can crystallize to a final form comprised of integral folding chain (IF) crystals with extended (n = 0), once-folded (n = 1), twice-folded (n = 2), and even triply-folded (n = 3) chain crystals. The fold length of NIF crystals increases with crystallization temperature. When this fold length is between those of IF (n = 2) and IF (n = 1) crystals, the NIF crystal can be thickened into the IF (n = 1) crystal, or thinned into the IF (n = 2) crystal. In the same way, if the fold length of NIF crystal lies between those of IF (n = 1) and IF (n = 0) crystals, similar isothermal thickening and thinning processes can also be observed. Which process occurs depends upon the thermodynamic driving force between the NIF and IF crystals and upon kinetic effects. Detailed kinetic maps of the fold length changes with time will be discussed. C1 BROOKHAVEN NATL LAB,NATL SYNCHOTRON LIGHT SOURCE,UPTON,NY 11973. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP CHENG, SZD (reprint author), UNIV AKRON,COLL POLYMER SCI & POLYMER ENGN,DEPT POLYMER SCI,AKRON,OH 44325, USA. NR 22 TC 41 Z9 42 U1 2 U2 12 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1992 VL 33 IS 6 BP 1140 EP 1149 DI 10.1016/0032-3861(92)90757-N PG 10 WC Polymer Science SC Polymer Science GA HL439 UT WOS:A1992HL43900003 ER PT J AU WU, W WIGNALL, GD MANDELKERN, L AF WU, W WIGNALL, GD MANDELKERN, L TI A SANS STUDY OF THE PLASTIC-DEFORMATION MECHANISM IN POLYETHYLENE SO POLYMER LA English DT Article DE SANS; PLASTIC DEFORMATION; POLYETHYLENE ID ANGLE NEUTRON-SCATTERING; DRAWN FIBERS; NECKING; MODEL AB Small angle neutron scattering was used to investigate the role of partial melting and recrystallization in the solid state deformation of polyethylene. Blends containing 4 vol% deuteropolyethylene in protonated polyethylene were deformed in a pure shear mode. The scattering cross section of the undeformed blends was well in excess of that expected for randomly (statistically) dispersed molecules, due to isotopic segregation effects between the deuterated and the protonated species. A significant reduction in the excess scattering was observed as the blends were deformed beyond the yield point. Upon further deformation, the cross section underwent a further modest decrease. Such a reduction is known to occur on melting. The neutron scattering results, hence, support the notion of local melting during the yielding and the subsequent deformation processes. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP WU, W (reprint author), NATL INST STANDARDS & TECHNOL,DIV POLYMERS,GAITHERSBURG,MD 20899, USA. OI Wignall, George/0000-0002-3876-3244 NR 15 TC 44 Z9 46 U1 4 U2 12 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1992 VL 33 IS 19 BP 4137 EP 4140 DI 10.1016/0032-3861(92)90617-6 PG 4 WC Polymer Science SC Polymer Science GA JR692 UT WOS:A1992JR69200024 ER PT J AU CHO, MH KYU, T LIN, JS SAIJO, K HASHIMOTO, T AF CHO, MH KYU, T LIN, JS SAIJO, K HASHIMOTO, T TI TIME-RESOLVED SMALL-ANGLE X-RAY-SCATTERING AND WIDE ANGLE X-RAY-DIFFRACTION STUDIES ON PREMELTING DURING ANNEALING OF GELATION CRYSTALLIZED ULTRAHIGH MOLECULAR-WEIGHT POLYETHYLENE FILMS SO POLYMER LA English DT Article DE SAXS; WAXD; ANNEALING; GELATION; CRYSTALLIZATION; POLYETHYLENE ID SINGLE-CRYSTALS AB The phenomenon of melting-recrystallization during annealing below an equilibrium melting temperature (141.6-degrees-C) of gelation crystallized ultrahigh molecular weight polyethylene (UHMWPE) films has been investigated by means of time-resolved small angle X-ray scattering (SAXS) and wide angle X-ray diffraction (WAXD). Isothermal annealing below 130-degrees-C shows that the SAXS long period (periodic distance of successive lamellae) increases, then subsequently levels off with increasing annealing time. At 140-degrees-C, the long period increases from 118 to 690 angstrom without any sign of levelling off. This type of increase in long period has been customarily attributed to lamellar thickening associated with solid state diffusion of intracrystalline chains. Recent synchrotron radiation studies on annealing of single crystal mats of conventional linear polyethylene demonstrated that melting-recrystallization is responsible for the increase in long period. The present time-dependent WAXD studies show a gradual decrease in crystallinity for some initial periods of annealing at 137-degrees-C, which slows down with elapsed time. At 140-degrees-C, the terminal melting occurs after 15 min. We propose that the increase in long period during annealing of this gelation crystallized UHMWPE near its melting temperature is due to the melting of successive lamellae rather than lamellar thickening. C1 UNIV AKRON,INST POLYMER ENGN,AKRON,OH 44325. OAK RIDGE NATL LAB,CTR SMALL ANGLE SCATTERING RES,DIV SOLID STATE,OAK RIDGE,TN 37831. KYOTO UNIV,DEPT POLYMER CHEM,KYOTO 606,JAPAN. NR 20 TC 10 Z9 10 U1 3 U2 14 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1992 VL 33 IS 19 BP 4152 EP 4157 DI 10.1016/0032-3861(92)90620-C PG 6 WC Polymer Science SC Polymer Science GA JR692 UT WOS:A1992JR69200027 ER PT J AU GILLEN, KT CLOUGH, RL AF GILLEN, KT CLOUGH, RL TI RIGOROUS EXPERIMENTAL CONFIRMATION OF A THEORETICAL-MODEL FOR DIFFUSION-LIMITED OXIDATION SO POLYMER LA English DT Article DE OXIDATION; DIFFUSION; AGING; DEGRADATION; KINETICS; EPDM; PROFILE; RADIATION ID POLYMER-FILMS; OXYGEN; DEGRADATION AB A rigorous test of theoretical treatments for diffusion-limited oxidation was completed by conducting an extensive series of radiation-initiated oxidation experiments on a commercial EPDM material. Oxidation profiles were monitored from density changes; profiles were obtained versus sample thickness, radiation dose rate and surrounding oxygen partial pressure. The resulting profile shapes and magnitudes could be quantitatively fit with a two-parameter theoretical treatment based on oxidation kinetics containing unimolecular termination reactions. The theoretical parameters derived from fitting allowed quantitative confirmation of a governing theoretical expression relating these parameters to independently measured values for the oxygen consumption and permeation rates. RP SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 28 TC 59 Z9 59 U1 1 U2 14 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 EI 1873-2291 J9 POLYMER JI Polymer PY 1992 VL 33 IS 20 BP 4358 EP 4365 DI 10.1016/0032-3861(92)90280-A PG 8 WC Polymer Science SC Polymer Science GA JU316 UT WOS:A1992JU31600020 ER PT J AU WILLIAMS, JM SCHULTEN, HR VANDERBORGH, NE WALKER, RD AF WILLIAMS, JM SCHULTEN, HR VANDERBORGH, NE WALKER, RD TI POLYMERIZATION DEPOLYMERIZATION OF 1,3-DIOXOLANE SO POLYMER LA English DT Article DE POLYMERIZATION; DEPOLYMERIZATION; 1,3-DIOXOLANE ID IONIZATION MASS-SPECTROMETRY AB Poly(1,3-dioxolane) can be cleanly depolymerized to the monomer. As such, the 1,3-dioxolane system is a good one to study to learn about microscopic reversibility. Besides describing how to perform the reversible polymerization reaction, this paper also presents data on the pyrolysis-field ionization mass spectrometry (Py-f.i.m.s.) and g.p.c. of the polymer and n.m.r. characterization of the monomer and polymer. The Py-f.i.m.s. data indicate that unhydrolysed polymer fragments in a manner similar to the reverse of the polymerization sequence, i.e. the carbonium ion portion of the oxymethylene end group bites back on oxygen atoms in the backbone, Base-terminated polymer, on the other hand, appears to undergo mid-chain cleavage. A dominant peak in the Py-f.i.m.s. spectrum of either, however, corresponds to the protonated cyclic dimer, a 10-crown-4 ether. A sequestered proton structure is proposed for this protonated species. C1 FACHHSCH FRESENIUS,DEPT TRACE ANAL,WIESBADEN,GERMANY. LOS ALAMOS NATL LAB,DIV ELECTR,LOS ALAMOS,NM 87545. PROCTER & GAMBLE CO,CINCINNATI,OH 45224. RP WILLIAMS, JM (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 30 TC 4 Z9 4 U1 0 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1992 VL 33 IS 21 BP 4630 EP 4634 DI 10.1016/0032-3861(92)90424-U PG 5 WC Polymer Science SC Polymer Science GA JX127 UT WOS:A1992JX12700027 ER PT J AU VARMANAIR, M JIN, YM WUNDERLICH, B AF VARMANAIR, M JIN, YM WUNDERLICH, B TI HEAT-CAPACITIES OF ALIPHATIC AND AROMATIC-POLYSULFONES SO POLYMER LA English DT Article DE POLYSULFONES; HEAT CAPACITY; CRYSTALLINE; VIBRATIONAL SPECTRUM; GLASS TRANSITION ID SOLID LINEAR MACROMOLECULES; HIGH MELTING POLYMERS; THERMODYNAMIC PROPERTIES; THERMAL-PROPERTIES; POLYETHYLENE; VIBRATIONS; CONVERSION; PHENYLENE; SCHEME; STATE AB Heat capacities were measured for three aromatic polysulphones: poly (1,4-phenylene sulphonyl), PAS; poly(oxy-1,4-phenylene-sulphonyl-1,4-phenylene), PPES; and poly[oxy-1,4-phenylene-sulphonyl-1,4-phenylene-oxy-1,4-phenylene-(1-methylidene)-1,4-phenylene], PBISP; from 150 to 620 K using differential scanning calorimetry. These new data, along with the prior ATHAS (Laboratory for Advanced Thermal Analysis, University of Tennessee) recommended experimental heat capacities for three aliphatic polysulphones: poly(1-propene sulphone), PIPS (20-300 K); poly(1-butene sulphone), P1BS (100-300 K); poly(1-hexene sulphone), P1HS (20-300 K), were fitted to an approximate frequency spectrum below their respective glass transition temperatures. The ATHAS computation scheme was used to compute the heat capacities that arise from these vibrations from 0.1 to 1000 K. The theta1-temperature changed from 685 K for P1PS to 587 K for P1HS while for PPES and PBISP much higher values (799.5 K and 777.8 K) than the other phenylene polymers analysed at ATHAS, were obtained. Using these data and the smoothed experimental liquid heat capacities, the glass transition temperatures for PAS, PPES and PBISP were obtained at 492.6, 497.4 and 458.2 K. The corresponding values for DELTAC(p) were 18.1, 37.7 and 126.6 J K-1 mol-1, respectively. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. NR 38 TC 4 Z9 4 U1 0 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1992 VL 33 IS 24 BP 5272 EP 5281 DI 10.1016/0032-3861(92)90812-B PG 10 WC Polymer Science SC Polymer Science GA KE171 UT WOS:A1992KE17100022 ER PT J AU CLOUGH, RL GILLEN, KT AF CLOUGH, RL GILLEN, KT TI OXYGEN DIFFUSION EFFECTS IN THERMALLY AGED ELASTOMERS SO POLYMER DEGRADATION AND STABILITY LA English DT Article ID OXIDATIVE-DEGRADATION; POLYMER DEGRADATION; RADIATION; MODEL AB We have obtained detailed, time-dependent modulus profiles on 2.2-mm thick samples of Neoprene and styrene-butadiene rubber (SBR) that were subjected to aging at temperatures of 80-150-degrees-C in air. The materials undergo strongly heterogeneous oxidation throughout this temperature range, with degradation much higher near surface regions than in the sample interior. The samples exhibit a latent onset of heterogeneous effects, particularly at the lower temperatures. As aging proceeds, the modulus in the exterior regions rises rapidly, whereas modulus changes in the interior region may slow down or stop. Numerous experiments with Neoprene formulations employing hindered phenol stabilizers of very different molecular weights demonstrate that heterogeneous oxidation is not the result of selective depletion of antioxidant from the surface regions of the sample. The primary cause of the incipient heterogeneous oxidation effects is a dramatic decrease in oxygen permeability coefficient as aging proceeds. RP CLOUGH, RL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 22 TC 74 Z9 74 U1 1 U2 18 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0141-3910 J9 POLYM DEGRAD STABIL JI Polym. Degrad. Stabil. PY 1992 VL 38 IS 1 BP 47 EP 56 DI 10.1016/0141-3910(92)90022-W PG 10 WC Polymer Science SC Polymer Science GA JB506 UT WOS:A1992JB50600008 ER PT B AU FALKOWSKI, PG AF FALKOWSKI, PG BE FALKOWSKI, PG WOODHEAD, AD TI MOLECULAR ECOLOGY OF PHYTOPLANKTON PHOTOSYNTHESIS SO PRIMARY PRODUCTIVITY AND BIOGEOCHEMICAL CYCLES IN THE SEA SE ENVIRONMENTAL SCIENCE RESEARCH LA English DT Proceedings Paper CT 37TH BROOKHAVEN SYMP IN BIOLOGY : PRIMARY PRODUCTIVITY AND BIOGEOCHEMICAL CYCLES IN THE SEA CY JUN 02-06, 1991 CL BROOKHAVEN NATL LAB, UPTON, NY SP US DOE, NASA, NATL SCI FDN, NATL OCEAN & ATMOSPH ADM, ELECT POWER RES INST, US EPA HO BROOKHAVEN NATL LAB RP FALKOWSKI, PG (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV OCEANOG & ATMOSPHER SCI,UPTON,NY 11973, USA. NR 0 TC 50 Z9 53 U1 1 U2 1 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA NEW YORK BN 0-306-44192-6 J9 ENVIR SCI R PY 1992 VL 43 BP 47 EP 67 PG 21 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA BV67T UT WOS:A1992BV67T00004 ER PT J AU CYGAN, RT BOSLOUGH, MB KIRKPATRICK, RJ AF CYGAN, RT BOSLOUGH, MB KIRKPATRICK, RJ TI NMR-SPECTROSCOPY OF EXPERIMENTALLY SHOCKED QUARTZ AND PLAGIOCLASE FELDSPAR POWDERS SO PROCEEDINGS OF LUNAR AND PLANETARY SCIENCE LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; LAMELLAR DEFORMATION FEATURES; CRETACEOUS-TERTIARY BOUNDARY; DISCRIMINATIVE CHARACTERISTICS; GENERATED VARIETIES; SILICA POLYMORPHS; METEOR CRATER; IMPACT; GLASSES; METAMORPHISM AB Magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy is an extremely sensitive and reproducible probe of disorder in synthetic quartz powder samples that have been experimentally shock loaded to peak pressures up to 22 GPa. Careful curve fitting and deconvolution of Si-29 NMR spectra of shocked quartz leads to four primary observations: (1) the width of the resonance increases systematically with shock pressure, indicating a greater distribution of local silicon environments caused by shock-induced disorder; (2) a much broader peak component appears, indicating the presence of highly disordered material, which TEM observation indicates may be due to very high dislocation densities, (3) the disordered material appears to have a significantly shorter T1 relaxation time than the crystalline material; and (4) there is no evidence for the presence of high-pressure silica phases (coesite or stishovite) in the shocked samples. The net effect of shock loading on the Si-29 NMR spectrum of quartz is an increase in peak width that strongly and consistently correlates with known shock pressure. Peak width is therefore a useful ''shock barometer'' for quartz in this pressure range for the experimental loading conditions. By contrast, Na-23, Al-27, and Si-29 MAS NMR spectra of shocked and unshocked An60 plagioclase feldspar powders do not change significantly with increasing shock pressure. There is no evidence for either amorphous or high-pressure phases in the Plagioclase spectra for shock pressures up to 22 GPa. C1 SANDIA NATL LABS,DIV STRUCT PHYS & SHOCK CHEM,ALBUQUERQUE,NM 87185. UNIV ILLINOIS,URBANA,IL 61801. RP CYGAN, RT (reprint author), SANDIA NATL LABS,DIV GEOCHEM,ALBUQUERQUE,NM 87185, USA. NR 35 TC 7 Z9 7 U1 0 U2 5 PU LUNAR AND PLANETARY INST PI HOUSTON PA 3600 BAY AREA BLVD, HOUSTON, TX 77058 SN 0270-9511 J9 P LUNAR PLANET SCI PY 1992 VL 22 BP 127 EP 136 PG 10 WC Geosciences, Multidisciplinary SC Geology GA MG416 UT WOS:A1992MG41600011 ER PT J AU FLYNN, GJ SUTTON, SR AF FLYNN, GJ SUTTON, SR TI TRACE-ELEMENTS IN CHONDRITIC STRATOSPHERIC PARTICLES - ZINC DEPLETION AS A POSSIBLE INDICATOR OF ATMOSPHERIC ENTRY HEATING SO PROCEEDINGS OF LUNAR AND PLANETARY SCIENCE LA English DT Article ID INTERPLANETARY DUST PARTICLES; INTER-PLANETARY DUST; EXTRATERRESTRIAL ORIGIN; SOLAR-SYSTEM; NOBLE-GASES AB Major- and trace-element abundances were measured by synchrotron X-ray fluorescence in 10 particles, 4 preliminarily classified as cosmic (U2015E8, U2015C27, W7027A1, and W7029B5), 5 as possibly cosmic (U2001C8, U2015C26, W7017D6, W7027E7, and W7029H4), and 1 as manmade (W7074D1), from stratospheric dust collectors flown by the NASA Johnson Space Center USC). Three particles (W7027A1, W7029B5, and U2015E8) show order-of-magnitude depletions in Zn from the CI abundance, though the concentrations of most other elements between Ca and Br resemble those previously reported for chondritic cosmic dust. The mean abundance of Zn in these particles (approximately 0.1x CI) is consistent with the average Zn abundance in the ordinary chondrite meteorites. However, the mean abundances of the moderately volatile elements Cu, Ga, Ge, and Se in these low-Zn particles are consistent with the CI meteorite abundances, distinguishing these particles from the ordinary chondrite meteorites, which are strongly depleted in Cu, Ga, Ge, and Se relative to CI. One possibility is that Zn is heterogeneously distributed in the parent object, and that the depletion is a sampling effect due to small particle size. However, Se, a chalcophile element with a similar nebula condensation temperature to Zn, is not depleted relative to CI in these particles. Since Zn is one of the most volatile elements measured, this Zn depletion may reflect volatile loss due to heating subsequent to the formation of the particles, possibly atmospheric entry heating. One low-Ni particle of possible igneous origin (U2001C8) was identified, and its elemental abundance pattern closely matches that previously reported for U2001B6. Three particles of uncertain origin (W7017D6, W7027E7, and W7029H4), called C? in the JSC Cosmic Dust Catalogs, but which exhibited Fe/Ni ratios within a factor of 3 of the CI ratio in their JSC energy-dispersive X-ray characterization, all exhibited minor-/trace-element abundance patterns consistent with chondritic cosmic dust. This suggests the usefulness of the Fe/Ni ratio, when coupled with other major-element chemistry, in classifying particles. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. UNIV CHICAGO,DEPT GEOPHYS SCI,CHICAGO,IL 60637. RP FLYNN, GJ (reprint author), SUNY COLL PLATTSBURGH,DEPT PHYS,PLATTSBURGH,NY 12901, USA. NR 44 TC 20 Z9 20 U1 0 U2 0 PU LUNAR AND PLANETARY INST PI HOUSTON PA 3600 BAY AREA BLVD, HOUSTON, TX 77058 SN 0270-9511 J9 P LUNAR PLANET SCI PY 1992 VL 22 BP 171 EP 184 PG 14 WC Geosciences, Multidisciplinary SC Geology GA MG416 UT WOS:A1992MG41600016 ER PT S AU CYGAN, RT BOSLOUGH, MB KIRKPATRICK, RJ AF CYGAN, RT BOSLOUGH, MB KIRKPATRICK, RJ BE Ryder, G Sharpton, VL TI NMR-SPECTROSCOPY OF EXPERIMENTALLY SHOCKED QUARTZ AND PLAGIOCLASE FELDSPAR POWDERS SO PROCEEDINGS OF LUNAR AND PLANETARY SCIENCE, VOL 22 SE PROCEEDINGS OF LUNAR AND PLANETARY SCIENCE LA English DT Proceedings Paper CT 22ND ANNUAL LUNAR AND PLANETARY CONF CY MAR 18-22, 1991 CL HOUSTON, TX SP LUNAR & PLANETARY INST, NASA, JOHNSON SPACE CTR, AMER ASSOC PETR GEOLOGISTS, AMER GEOPHY UNION, AMER ASTRON SOC, DIV PLANETARY SCI, GEOL SOC AMER, INT UNION GEOL SCI, METEORIT SOC RP CYGAN, RT (reprint author), SANDIA NATL LABS,DIV GEOCHEM,ALBUQUERQUE,NM 87185, USA. NR 0 TC 7 Z9 7 U1 0 U2 5 PU LUNAR & PLANETARY INST PI HOUSTON PA HOUSTON SN 0270-9511 BN 0-942862-06-6 J9 P LUNAR PLANET SCI PY 1992 VL 22 BP 127 EP 136 PG 10 WC Geosciences, Multidisciplinary SC Geology GA BZ04N UT WOS:A1992BZ04N00011 ER PT S AU MYERS, SM FOLLSTAEDT, DM STEIN, HJ WAMPLER, WR AF MYERS, SM FOLLSTAEDT, DM STEIN, HJ WAMPLER, WR BE Davies, G Deleo, GG Stavola, M TI INTERACTION OF DEUTERIUM WITH INTERNAL SURFACES IN SILICON SO PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3 SE Materials Science Forum LA English DT Proceedings Paper CT 16TH INTERNATIONAL CONF ON DEFECTS IN SEMICONDUCTORS ( ICDS-16 ) CY JUL 22-26, 1991 CL LEHIGH UNIV, BETHLEHEM, PA SP USAF, OFF SCI RES, BANDGAP TECHNOL, DEF ADV RES PROJECTS AGCY, EASTMAN KODAK, FORD MOTOR, FUJITSU LABS, IBM, KAWASAKI STEEL, LEHIGH UNIV, MOBIL SOLAR ENERGY HO LEHIGH UNIV C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-628-9 J9 MATER SCI FORUM PY 1992 VL 83 BP 81 EP 86 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA BW69F UT WOS:A1992BW69F00014 ER PT S AU STEIN, HJ HAHN, S RICHARDS, PM AF STEIN, HJ HAHN, S RICHARDS, PM BE Davies, G Deleo, GG Stavola, M TI DEPTH PROFILES FOR HYDROGEN-ASSISTED THERMAL DONOR FORMATION IN SILICON SO PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3 SE Materials Science Forum LA English DT Proceedings Paper CT 16TH INTERNATIONAL CONF ON DEFECTS IN SEMICONDUCTORS ( ICDS-16 ) CY JUL 22-26, 1991 CL LEHIGH UNIV, BETHLEHEM, PA SP USAF, OFF SCI RES, BANDGAP TECHNOL, DEF ADV RES PROJECTS AGCY, EASTMAN KODAK, FORD MOTOR, FUJITSU LABS, IBM, KAWASAKI STEEL, LEHIGH UNIV, MOBIL SOLAR ENERGY HO LEHIGH UNIV C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-628-9 J9 MATER SCI FORUM PY 1992 VL 83 BP 105 EP 110 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA BW69F UT WOS:A1992BW69F00018 ER PT S AU ZACH, FX GRIMMEISS, H HALLER, EE AF ZACH, FX GRIMMEISS, H HALLER, EE BE Davies, G Deleo, GG Stavola, M TI NICKEL RELATED DEEP LEVELS IN GERMANIUM SO PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3 SE Materials Science Forum LA English DT Proceedings Paper CT 16TH INTERNATIONAL CONF ON DEFECTS IN SEMICONDUCTORS ( ICDS-16 ) CY JUL 22-26, 1991 CL LEHIGH UNIV, BETHLEHEM, PA SP USAF, OFF SCI RES, BANDGAP TECHNOL, DEF ADV RES PROJECTS AGCY, EASTMAN KODAK, FORD MOTOR, FUJITSU LABS, IBM, KAWASAKI STEEL, LEHIGH UNIV, MOBIL SOLAR ENERGY HO LEHIGH UNIV C1 LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-628-9 J9 MATER SCI FORUM PY 1992 VL 83 BP 245 EP 250 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA BW69F UT WOS:A1992BW69F00040 ER PT S AU WALUKIEWICZ, W YU, KM CHAN, LY JAKLEVIC, J HALLER, EE AF WALUKIEWICZ, W YU, KM CHAN, LY JAKLEVIC, J HALLER, EE BE Davies, G Deleo, GG Stavola, M TI ELECTRICAL-ACTIVITY AND DIFFUSION OF SHALLOW ACCEPTORS IN III-V-SEMICONDUCTORS SO PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3 SE Materials Science Forum LA English DT Proceedings Paper CT 16TH INTERNATIONAL CONF ON DEFECTS IN SEMICONDUCTORS ( ICDS-16 ) CY JUL 22-26, 1991 CL LEHIGH UNIV, BETHLEHEM, PA SP USAF, OFF SCI RES, BANDGAP TECHNOL, DEF ADV RES PROJECTS AGCY, EASTMAN KODAK, FORD MOTOR, FUJITSU LABS, IBM, KAWASAKI STEEL, LEHIGH UNIV, MOBIL SOLAR ENERGY HO LEHIGH UNIV C1 LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-628-9 J9 MATER SCI FORUM PY 1992 VL 83 BP 941 EP 946 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA BW69F UT WOS:A1992BW69F00146 ER PT S AU LILIENTALWEBER, Z CLAVERIE, A WERNER, P SCHAFF, W WEBER, ER AF LILIENTALWEBER, Z CLAVERIE, A WERNER, P SCHAFF, W WEBER, ER BE Davies, G Deleo, GG Stavola, M TI INFLUENCE OF GROWTH-RATE AND TEMPERATURE ON THE STRUCTURE OF LOW-TEMPERATURE GAAS SO PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3 SE Materials Science Forum LA English DT Proceedings Paper CT 16TH INTERNATIONAL CONF ON DEFECTS IN SEMICONDUCTORS ( ICDS-16 ) CY JUL 22-26, 1991 CL LEHIGH UNIV, BETHLEHEM, PA SP USAF, OFF SCI RES, BANDGAP TECHNOL, DEF ADV RES PROJECTS AGCY, EASTMAN KODAK, FORD MOTOR, FUJITSU LABS, IBM, KAWASAKI STEEL, LEHIGH UNIV, MOBIL SOLAR ENERGY HO LEHIGH UNIV C1 LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. NR 0 TC 8 Z9 8 U1 0 U2 2 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-628-9 J9 MATER SCI FORUM PY 1992 VL 83 BP 1045 EP 1050 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA BW69F UT WOS:A1992BW69F00162 ER PT S AU SOPORI, B AF SOPORI, B BE Davies, G Deleo, GG Stavola, M TI HYDROGEN INDUCED DEFECTS AND DEFECT PASSIVATION IN SILICON SOLAR-CELLS SO PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3 SE Materials Science Forum LA English DT Proceedings Paper CT 16TH INTERNATIONAL CONF ON DEFECTS IN SEMICONDUCTORS ( ICDS-16 ) CY JUL 22-26, 1991 CL LEHIGH UNIV, BETHLEHEM, PA SP USAF, OFF SCI RES, BANDGAP TECHNOL, DEF ADV RES PROJECTS AGCY, EASTMAN KODAK, FORD MOTOR, FUJITSU LABS, IBM, KAWASAKI STEEL, LEHIGH UNIV, MOBIL SOLAR ENERGY HO LEHIGH UNIV C1 SOLAR ENERGY RES INST, GOLDEN, CO 80401 USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-628-9 J9 MATER SCI FORUM PY 1992 VL 83 BP 1531 EP 1538 PG 8 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA BW69F UT WOS:A1992BW69F00235 ER PT J AU LANGAN, WT AF LANGAN, WT BE Huber, WJ TI WELCOME TO METC SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 3 EP 6 PG 4 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00001 ER PT J AU MAYFIELD, MJ AF MAYFIELD, MJ BE Huber, WJ TI METC PERSPECTIVE SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 7 EP 9 PG 3 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00002 ER PT J AU PATIL, PG AF PATIL, PG BE Huber, WJ TI DOES VEHICULAR FUEL-CELL RESEARCH-AND-DEVELOPMENT PROGRAM SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 US DOE,OFF TRANSPORTAT TECHNOL CONSERVAT & RENEWABLE ENERGY,WASHINGTON,DC 20585. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 15 EP 15 PG 1 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00004 ER PT J AU KUCERA, GH MYLES, KM BROWN, AP ROCHE, M CHU, D INDACOCHEA, E AF KUCERA, GH MYLES, KM BROWN, AP ROCHE, M CHU, D INDACOCHEA, E BE Huber, WJ TI ANLS RESEARCH-AND-DEVELOPMENT OF ALTERNATIVE COMPONENTS FOR MCFCS SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 1 Z9 1 U1 0 U2 0 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 31 EP 41 PG 11 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00008 ER PT J AU PALMER, BA OLDENBORG, RC FUNK, DJ AF PALMER, BA OLDENBORG, RC FUNK, DJ BE Huber, WJ TI MCFC DIAGNOSTICS - HCL DETECTION SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 58 EP 64 PG 7 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00012 ER PT J AU KRUMPELT, M MYLES, KM BALACHANDRAN, U DORRIS, S DEES, D MAJUMDAR, S AF KRUMPELT, M MYLES, KM BALACHANDRAN, U DORRIS, S DEES, D MAJUMDAR, S BE Huber, WJ TI SUPPORTING RESEARCH FOR MSOFC DEVELOPMENT SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 89 EP 93 PG 5 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00017 ER PT B AU BLOOM, I MYLES, KM KRUMPELT, M HASH, MC ZEBROWSKI, JP ZURAWSKI, D AF BLOOM, I MYLES, KM KRUMPELT, M HASH, MC ZEBROWSKI, JP ZURAWSKI, D BE Huber, WJ TI INTERMEDIATE TEMPERATURE ELECTROLYTES FOR SOFC SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 109 EP 112 PG 4 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00020 ER PT B AU CHICK, LA BATES, JL AF CHICK, LA BATES, JL BE Huber, WJ TI ALTERNATIVE MATERIALS FOR SOLID OXIDE FUEL-CELLS - FACTORS AFFECTING AIR-SINTERING OF CHROMITE INTERCONNECTIONS SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 2 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 113 EP 123 PG 11 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00021 ER PT B AU DORRIS, SE MYLES, KM BLOOM, I KRUMPELT, M HASH, MC AF DORRIS, SE MYLES, KM BLOOM, I KRUMPELT, M HASH, MC BE Huber, WJ TI SEALANT RESEARCH FOR SOLID OXIDE FUEL-CELLS SO PROCEEDINGS OF THE FOURTH ANNUAL FUEL CELLS CONTRACTORS REVIEW MEETING LA English DT Proceedings Paper CT 4th Annual Fuel Cells Contractors Review Meeting CY JUL 14-15, 1992 CL MORGANTOWN ENERGY TECHNOL CTR, MORGANTOWN, WV SP US DOE, OFF FOSSIL ENERGY, MORGANTOWN ENERGY TECHNOL CTR HO MORGANTOWN ENERGY TECHNOL CTR C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU US DEPT COMMERCE NATL TECH INFORMATION SERVICE PI WASHINGTON PA 14TH & CONSTITUTION AVE, WASHINGTON, DC 20230 PY 1992 BP 133 EP 137 PG 5 WC Energy & Fuels SC Energy & Fuels GA BA47D UT WOS:A1992BA47D00023 ER PT J AU MILLER, EK BURKE, GJ AF MILLER, EK BURKE, GJ TI LOW-FREQUENCY COMPUTATIONAL ELECTROMAGNETICS FOR ANTENNA ANALYSIS SO PROCEEDINGS OF THE IEEE LA English DT Article ID ANISOTROPIC GROUNDED LAYER; WIRE ANTENNAS; INPUT ADMITTANCE; THIN WIRE; FEED GAP; CIRCULAR-CYLINDERS; INSULATED ANTENNA; DIPOLE ANTENNAS; RADIATION; SCATTERING AB An overview of computational methods for modeling the low-frequency electromagnetic characteristics of antennas is given here. Presented first is a brief analytical background that forms the basis for numerically solving low-frequency antenna problems using the method of moments. Next discussed are extensions to modeling perfectly conducting objects in free space, followed by a consideration of some computational issues that affect model accuracy, efficiency, and utility. The article concludes with a variety of representative applications to illustrate various aspects of modeling and capabilities that are currently available. A fairly extensive bibliography is included to suggest further reference material to the read. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP MILLER, EK (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,MS 4580,MEE-3 GRP,LOS ALAMOS,NM 87545, USA. NR 89 TC 8 Z9 8 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9219 J9 P IEEE JI Proc. IEEE PD JAN PY 1992 VL 80 IS 1 BP 24 EP 43 DI 10.1109/5.119565 PG 20 WC Engineering, Electrical & Electronic SC Engineering GA HE999 UT WOS:A1992HE99900003 ER PT J AU ICHIKAWA, H SHIMIZU, K SAITO, A WANG, D OLIVA, R KOBAYASHI, H KANEKO, Y MIYOSHI, H SMITH, CL CANTOR, CR OHKI, M AF ICHIKAWA, H SHIMIZU, K SAITO, A WANG, D OLIVA, R KOBAYASHI, H KANEKO, Y MIYOSHI, H SMITH, CL CANTOR, CR OHKI, M TI LONG-DISTANCE RESTRICTION MAPPING OF THE PROXIMAL LONG ARM OF HUMAN CHROMOSOME-21 WITH NOT-I LINKING CLONES SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID ALZHEIMERS-DISEASE; GEL-ELECTROPHORESIS; DNA-SEQUENCES; HUMAN GENOME; SEPARATION; MAPS; GENE; BREAKPOINT; LOCUS AB Human chromosome 21 is the smallest of the 22 autosomes and 2 sex chromosomes. Hybridization of the human repetitive sequence Alu to pulsed-field gel-fractionated Not I-digested genomic DNA from a human-mouse hybrid cell line containing chromosome 21 as the sole human component identified chromosome 21 Not I restriction fragments. A Not I restriction map of regions of the chromosome was constructed, by identifying neighboring Alu bands with Not I linking clones. This approach simplifies the task of physical mapping and avoids ambiguities in Not I fragment assignments that arise from gel-to-gel mobility variations. A contiguous map was constructed with six Not I linking clones that covers at least the proximal one-third of the long arm of chromosome 21 and spans 20 megabases. A more detailed restriction map revealed 11 likely CpG islands in this region and localized 11 additional DNA markers. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM BIODYNAM,BERKELEY,CA 94720. SAITAMA CANC CTR HOSP,DEPT LAB MED,SAITAMA,JAPAN. UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,BERKELEY,CA 94720. RP ICHIKAWA, H (reprint author), SAITAMA CANC CTR,RES INST,DEPT IMMUNOL & VIROL,INA,SAITAMA 362,JAPAN. RI Oliva, Rafael/C-9741-2009; Miyoshi, Hiroyuki/G-9808-2013; Slagboom, P. Eline/R-4790-2016; OI Oliva, Rafael/0000-0003-4876-2410; Slagboom, P. Eline/0000-0002-2875-4723; Smith, Cassandra/0000-0002-0346-8907 FU NCI NIH HHS [CA39782] NR 39 TC 53 Z9 53 U1 0 U2 0 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD JAN 1 PY 1992 VL 89 IS 1 BP 23 EP 27 DI 10.1073/pnas.89.1.23 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA GY047 UT WOS:A1992GY04700006 PM 1346067 ER PT B AU WEITSMAN, Y ZHU, H AF WEITSMAN, Y ZHU, H BE Sun, CT Loo, TT TI MULTI-FRACTURE OF CERAMIC COMPOSITES SO PROCEEDINGS OF THE SECOND INTERNATIONAL SYMPOSIUM ON COMPOSITE MATERIALS AND STRUCTURES LA English DT Proceedings Paper CT 2nd International Symposium on Composite Materials and Structures CY AUG 03-07, 1992 CL BEIJING, PEOPLES R CHINA SP CHINESE SOC THEORET & APPL MECH, AMER SOC COMPOSITES, BRIT COMPOSITES SOC, CANADIAN ASSOC COMPOSITE STRUCT & MAT, JAPAN SOC COMPOSITE MAT, CHINESE SOC AERONAUT & ASTRONAUT, CHINESE COMPOSITE SOC, CHINA ASSOC SCI & TECHNOL, NATL NAT SCI FDN CHINA C1 UNIV TENNESSEE,OAK RIDGE NATL LAB,DIV TECH,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PEKING UNIV PRESS PI BEIJING PA HAIDIANQU, BEIJING, PEOPLES R CHINA BN 7-301-01862-2 PY 1992 BP 817 EP 821 PG 5 WC Mechanics; Materials Science, Composites SC Mechanics; Materials Science GA BC88N UT WOS:A1992BC88N00137 ER PT J AU LEVY, SC BRO, P AF LEVY, SC BRO, P GP CALIF STATE UNIV TI ACCELERATED TESTING OF BATTERIES SO PROCEEDINGS OF THE SEVENTH ANNUAL BATTERY CONFERENCE ON APPLICATIONS AND ADVANCES LA English DT Proceedings Paper CT 7th Annual Battery Conference on Applications and Advances CY JAN 21-23, 1992 CL LONG BEACH, CA SP CALIF STATE UNIV LONG BEACH, DEPT ELECT ENGN C1 SANDIA NATL LABS,DIV EXPLORATORY BATTERIES,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CALIFORNIA STATE UNIV CONSORTIUM PI LONG BEACH PA 1250 BELLFLOWER BLVD, LONG BEACH, CA 90840 PY 1992 BP 311 EP 318 PG 8 WC Electrochemistry; Engineering, Electrical & Electronic SC Electrochemistry; Engineering GA BZ58H UT WOS:A1992BZ58H00028 ER PT J AU HUFF, JR AF HUFF, JR GP CALIF STATE UNIV TI FUEL-CELL POWER-PLANTS FOR TRANSPORTATION APPLICATIONS SO PROCEEDINGS OF THE SEVENTH ANNUAL BATTERY CONFERENCE ON APPLICATIONS AND ADVANCES LA English DT Proceedings Paper CT 7th Annual Battery Conference on Applications and Advances CY JAN 21-23, 1992 CL LONG BEACH, CA SP CALIF STATE UNIV LONG BEACH, DEPT ELECT ENGN C1 LOS ALAMOS NATL LAB,ADV ENGN TECHNOL GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CALIFORNIA STATE UNIV CONSORTIUM PI LONG BEACH PA 1250 BELLFLOWER BLVD, LONG BEACH, CA 90840 PY 1992 BP 329 EP 335 PG 7 WC Electrochemistry; Engineering, Electrical & Electronic SC Electrochemistry; Engineering GA BZ58H UT WOS:A1992BZ58H00030 ER PT J AU BURKE, AF AF BURKE, AF GP CALIF STATE UNIV TI CHARGE DISCHARGE CHARACTERISTICS OF A FULL-SIZE SODIUM-SULFUR BATTERY FOR AN ELECTRIC VEHICLE SO PROCEEDINGS OF THE SEVENTH ANNUAL BATTERY CONFERENCE ON APPLICATIONS AND ADVANCES LA English DT Proceedings Paper CT 7th Annual Battery Conference on Applications and Advances CY JAN 21-23, 1992 CL LONG BEACH, CA SP CALIF STATE UNIV LONG BEACH, DEPT ELECT ENGN C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CALIFORNIA STATE UNIV CONSORTIUM PI LONG BEACH PA 1250 BELLFLOWER BLVD, LONG BEACH, CA 90840 PY 1992 BP 383 EP 411 PG 29 WC Electrochemistry; Engineering, Electrical & Electronic SC Electrochemistry; Engineering GA BZ58H UT WOS:A1992BZ58H00034 ER PT B AU DELUCA, WH GILLIE, KR WEBSTER, CE KULAGA, JE AF DELUCA, WH GILLIE, KR WEBSTER, CE KULAGA, JE GP CALIF STATE UNIV TI EFFECTS OF CHARGE METHODS AND PULSE CHARGE CURRENTS ON NICKEL IRON TRACTION BATTERY PERFORMANCE SO PROCEEDINGS OF THE SEVENTH ANNUAL BATTERY CONFERENCE ON APPLICATIONS AND ADVANCES LA English DT Proceedings Paper CT 7th Annual Battery Conference on Applications and Advances CY JAN 21-23, 1992 CL LONG BEACH, CA SP CALIF STATE UNIV LONG BEACH, DEPT ELECT ENGN C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ELECTROCHEM TECHNOL PROGRAM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CALIFORNIA STATE UNIV CONSORTIUM PI LONG BEACH PA 1250 BELLFLOWER BLVD, LONG BEACH, CA 90840 PY 1992 BP 413 EP 422 PG 10 WC Electrochemistry; Engineering, Electrical & Electronic SC Electrochemistry; Engineering GA BZ58H UT WOS:A1992BZ58H00035 ER PT B AU ZUREK, WH AF ZUREK, WH BE Chardin, G Fackler, O TranThanhVan, J TI ENVIRONMENT - INDUCED DECOHERENCE AND THE TRANSITION FROM QUANTUM TO CLASSICAL SO PROGRESS IN ATOMIC PHYSICS NEUTRINOS AND GRAVITATION SE MORIOND WORKSHOPS LA English DT Proceedings Paper CT XIIth Moriond Workshop on Progress in Atomic Physics, Neutrinos and Gravitation CY JAN 25-FEB 01, 1992 CL LES ARCS, FRANCE SP CNRS, COMMISSARIAT ENERGIE ATOM, NATL RES FDN C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-117-X J9 MORIOND WOR PY 1992 VL 72 BP 355 EP 369 PG 15 WC Physics, Atomic, Molecular & Chemical SC Physics GA BB99G UT WOS:A1992BB99G00044 ER PT J AU MICHAEL, JV AF MICHAEL, JV TI MEASUREMENT OF THERMAL RATE CONSTANTS BY FLASH OR LASER PHOTOLYSIS IN SHOCK-TUBES - OXIDATIONS OF H-2 AND D2 SO PROGRESS IN ENERGY AND COMBUSTION SCIENCE LA English DT Review ID RESONANCE-ABSORPTION-MEASUREMENTS; TEMPERATURE REACTION-RATE; H2O + H; CHEMICAL-KINETICS; RATE COEFFICIENT; HYDROGEN-ATOMS; ABSOLUTE RATE; BACK-REACTION; O-ATOMS; RANGE AB The flash or laser photolysis-shock tube (FP- or LP-ST) technique for measuring thermal rate constants at high temperatures in reflected shock waves is discussed. The method of detection is atomic resonance absorption spectroscopy (ARAS). The hydrodynamic perturbation due to boundary layer formation is also discussed. Of particular interest is the effect of this process on the thermodynamic state of the hot gas in the reflected regime. Then the method is illustrated with recent results on reactions of importance in the oxidation mechanisms for H-2 and D2. On the basis of these new direct results, recommendations for the most important rate constants are presented. RP MICHAEL, JV (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Michael, Joe/E-3907-2010 NR 155 TC 103 Z9 103 U1 0 U2 13 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-1285 J9 PROG ENERG COMBUST JI Prog. Energy Combust. Sci. PY 1992 VL 18 IS 4 BP 327 EP 347 DI 10.1016/0360-1285(92)90004-K PG 21 WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA HV982 UT WOS:A1992HV98200002 ER PT J AU GARRETT, CW AF GARRETT, CW TI ON GLOBAL CLIMATE CHANGE, CARBON-DIOXIDE, AND FOSSIL-FUEL COMBUSTION SO PROGRESS IN ENERGY AND COMBUSTION SCIENCE LA English DT Review ID GENERAL-CIRCULATION MODELS; ATMOSPHERIC CO2; UNITED-STATES; TEMPERATURE-CHANGES; ARCTIC ICE; GREENHOUSE; RADIATION; FEEDBACK; TRENDS; WATER AB Global climate change (GCC), greenhouse (GH) gases and the uncertainties swirling about them are of considerable concern to the Congress and to the public. Although the uncertainties leave GCC and GH gas implications open, the only GH gas of significance that results from fossil fuel combustion, namely CO2, has drawn much attention. This review discusses the concerns in two parts. The first part covers in some detail the scientific and technical aspects of GCC and the relationships of CO2 and fossil fuels to it. It includes sections on the GH effect; on the anthropogenic atmospheric emission of CO2 which has increased some 25% since the preindustrial period; on the analyses of historical temperature data which suggest we currently may be in a warming period; on global climate modeling, presently inadequate but necessary to analyze the past as well as to make future predictions; on climatic effects; and on possible mitigation methods for CO2 injections resulting from fossil fuel combustion. Intended primarily as a primer on GCC for the fossil fuel technical community, the relationships between fossil fueled systems and atmospheric injections of CO2 are addressed only in a general fashion. The details of various technologies and their systems (conventional and future) are left for the reader to obtain from other sources. The second part notes in more abbreviated form some economic, demographic and international considerations. The use of an identity points to population increases as one key determinant of future GCC effects. The uncertainties, scientific and other, are noted throughout; they inhibit the reaching of conclusions regarding GH impacts on GCC. A large number of literature citations are provided, leading to further references on the subject. RP GARRETT, CW (reprint author), US DOE, OFF FOSSIL ENERGY, WASHINGTON, DC 20585 USA. NR 237 TC 11 Z9 16 U1 2 U2 26 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-1285 J9 PROG ENERG COMBUST JI Prog. Energy Combust. Sci. PY 1992 VL 18 IS 5 BP 369 EP 407 DI 10.1016/0360-1285(92)90007-N PG 39 WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA JG022 UT WOS:A1992JG02200001 ER PT J AU MANN, MD COLLINGS, ME BOTROS, PE AF MANN, MD COLLINGS, ME BOTROS, PE TI NITROUS-OXIDE EMISSIONS IN FLUIDIZED-BED COMBUSTION - FUNDAMENTAL CHEMISTRY AND COMBUSTION TESTING SO PROGRESS IN ENERGY AND COMBUSTION SCIENCE LA English DT Review ID FUEL COMBUSTION; COAL FLAMES; N2O; ATMOSPHERE; TRENDS AB Growing scientific and public concern over global warming and ozone layer depletion has led researchers to study nitrous oxide (N2O) emissions from natural and anthropogenic sources. N2O is reportedly increasing in the atmosphere at an estimated rate of 0.7 ppb per year and was measured in the atmosphere at 307 ppb in 1988. Since N2O is a stable compound, it is transported to the stratosphere where it is photochemically oxidized to nitric oxide (NO), a contributor to catalytic ozone depletion. Potential anthropogenic sources of N2O that have been investigated include biomass burning, fertilization, ground-water release through irrigation and fossil fuel combustion. Until recently, pulverized-coal combustion was implicated as the main source of N2O emissions due to errors encountered in sampling. Emissions from these units are typically less than 10 ppm N2O. Fluidized-bed combustion (FBC) has emerged as an advanced method of energy production by utilities, but under current designs these units have been shown to emit greater N2O) emissions than their pulverized-coal counterparts. This fact is related to lower combustion temperatures used to enhance SOx/NOx control, which, as a consequence, increases N2O emissions. Nitrous oxide emissions from FBCs range from 50-200 ppm. At N2O concentrations of 10) ppm, and assuming a 2.5% growth rate in U.S. coal-derived energy production with 50% of this generated by FBCs, by the year 2000 this production would account for only 1% of the total current global N2O inventory. Nitrous oxide emissions from FBCs are strongly dependent upon fuel type, operating temperature, and excess air level. Based on current measurements at standard operating conditions (1550-degrees-F and 3.5% O2), fuels such as wood, peat and lignite generally will have N2O emissions ranging from 15-50 ppm. Subbituminous and bituminous coal combustion generate emissions ranging from 40-100 ppm and 70-200 ppm, respectively. Petroleum coke combustion is similar to bituminous coal. Actual emissions from a plant will decrease with increasing operating temperature (0.2-1.1 ppm N2O/degrees-F) or decreasing excess air levels (7-21 ppm N2O/% O2). Possible N2O abatement strategies include afterburning of a gaseous fuel in the freeboard or cyclone, increasing bed temperatures, decreasing excess air, or catalytic reduction of N2O by metal oxides. C1 US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507. RP MANN, MD (reprint author), UNIV N DAKOTA,ENERGY & ENVIRONM RES CTR,POB 8213,GRAND FORKS,ND 58202, USA. NR 58 TC 56 Z9 57 U1 0 U2 13 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-1285 J9 PROG ENERG COMBUST JI Prog. Energy Combust. Sci. PY 1992 VL 18 IS 5 BP 447 EP 461 DI 10.1016/0360-1285(92)90010-X PG 15 WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA JG022 UT WOS:A1992JG02200004 ER PT J AU SNYDER, F LEE, TC BLANK, ML AF SNYDER, F LEE, TC BLANK, ML TI THE ROLE OF TRANSACYLASES IN THE METABOLISM OF ARACHIDONATE AND PLATELET-ACTIVATING-FACTOR SO PROGRESS IN LIPID RESEARCH LA English DT Review ID LYSOLECITHIN-LYSOLECITHIN ACYLTRANSFERASE; RABBIT ALVEOLAR MACROPHAGES; MYOCARDIAL LYSOPHOSPHOLIPASE-TRANSACYLASE; AORTIC ENDOTHELIAL-CELLS; CULTURED NEURO-BLASTOMA; HEART-MUSCLE MICROSOMES; PRECURSOR FATTY-ACIDS; RAT-BRAIN MICROSOMES; GUINEA-PIG HEART; FISH OIL DIET RP SNYDER, F (reprint author), OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,POB 117,OAK RIDGE,TN 37831, USA. FU NIDDK NIH HHS [R01 DK42804-01A1]; PHS HHS [35495-04A1-02] NR 163 TC 73 Z9 73 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0163-7827 J9 PROG LIPID RES JI Prog. Lipid. Res. PY 1992 VL 31 IS 1 BP 65 EP 86 DI 10.1016/0163-7827(92)90016-C PG 22 WC Biochemistry & Molecular Biology; Nutrition & Dietetics SC Biochemistry & Molecular Biology; Nutrition & Dietetics GA HM239 UT WOS:A1992HM23900003 PM 1641397 ER EF