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NSR database version of March 21, 2024.

Search: Author = S.B.Gazes

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1999AH07      Phys.Rev. C60, 064601 (1999)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, C.M.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, Th.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.M.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, A.R.Young, J.E.Yurkon

Positron-Electron Pairs Produced in Heavy-Ion Collisions

NUCLEAR REACTIONS 232Th(238U, X), E=5.95 MeV/nucleon; 181Ta(238U, X), E=5.95, 6.1, 6.3 MeV/nucleon; measured positron, electron spectra, multiplicities, e-e+-coin, angular correlation; deduced no sharp structure in sum-energy spectra. APEX spectrometer.

doi: 10.1103/PhysRevC.60.064601
Citations: PlumX Metrics


1997AH01      Phys.Rev.Lett. 78, 618 (1997)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.R.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon, and the APEX Collaboration

Search for Monoenergetic Positron Emission from Heavy-Ion Collisions at Coulomb-Barrier Energies

NUCLEAR REACTIONS 181Ta(238U, X), E=5.95-6.3 MeV/nucleon; 232Th(238U, X), E=5.95 MeV/nucleon; measured positron energy spectra; deduced no structure.

doi: 10.1103/PhysRevLett.78.618
Citations: PlumX Metrics


1997AH04      Phys.Rev. C55, R2755 (1997)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.A.Chishti, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, J.S.Greenberg, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon, and the APEX Collaboration

Internal Pair Conversion in Heavy Nuclei

NUCLEAR REACTIONS 206Pb(206Pb, X), E=5.90 MeV/nucleon; measured e+e--sum energy spectra, Doppler corrected Eγ; deduced internal pair conversion to gamma branching ratio. 232Th(208Pb, X), E=5.80 MeV/nucleon; 238U(208Pb, X), E=5.80 MeV/nucleon; 181Ta(238U, X), E=5.95 MeV/nucleon; 232Th(238U, X), E=5.90 MeV/nucleon; measured e+e--sum energy, Doppler corrected Eγ; deduced no discrete lines evidence in e+e- spectra. 238U deduced new levels evidence.

doi: 10.1103/PhysRevC.55.R2755
Citations: PlumX Metrics


1997AH05      Z.Phys. A358, 235 (1997)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, A.Young, J.E.Yurkon, and the APEX Collaboration

The Positron-Electron Peak Puzzle: Results from APEX

NUCLEAR REACTIONS 232Th(238U, X), E=5.78-5.95 MeV/nucleon; 181Ta(238U, X), E=5.79-6.3 MeV/nucleon; measured total (e+)(heavy-ion)-, (e+e-)(heavy-ion)-coin events number; deduced very low light neutral particle production upper limits.

doi: 10.1007/s002180050316
Citations: PlumX Metrics


1996AH07      Nucl.Instrum.Methods Phys.Res. A370, 539 (1996)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, J.S.Greenberg, J.P.Greene, A.L.Hallin, Th.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.M.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.R.Young, J.E.Yurkon

A Solenoidal Spectrometer for Positron-Electron Pairs Produced in Heavy-Ion Collisions

RADIOACTIVITY 85Sr(EC); 113Sn(EC); 203Hg(β-); measured electron spectra; deduced apparatus response, efficiency. New solenoidal spectrometer.

NUCLEAR REACTIONS 181Ta(238U, X), E=6.1 MeV/nucleon; measured γ-, positron energy spectra. New solenoidal spectrometer.

doi: 10.1016/0168-9002(95)00829-2
Citations: PlumX Metrics


1995AH01      Nucl.Phys. A583, 247c (1995)

I.Ahmad, S.M.Austin, B.B.Back, D.Bazin, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, J.S.Greenberg, A.L.Hallin, T.Happ, J.Last, N.Kaloskamis, E.Kashy, W.Kutschera, C.J.Lister, M.Liu, M.R.Maier, D.Mercer, A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon

Positron Production in Heavy Ion Collisions: Current status of the problem

NUCLEAR REACTIONS 181Ta(238U, X), E=5.9-6.3 MeV/nucleon; compiled, analyzed, reviewed electron, positron production data.

doi: 10.1016/0375-9474(94)00667-C
Citations: PlumX Metrics


1995AH06      Phys.Rev.Lett. 75, 2658 (1995)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon, and the APEX Collaboration

Search for Narrow Sum-Energy Lines in Electron-Positron Pair Emission from Heavy-Ion Collisions Near the Coulomb Barrier

NUCLEAR REACTIONS 181Ta(238U, X), E=5.95-6.3 MeV/nucleon; 232Th(238U, X), E=5.95 MeV/nucleon; measured pair emission sum spectra; deduced no sharp lines evidence, neutral particle isolated decay related features.

doi: 10.1103/PhysRevLett.75.2658
Citations: PlumX Metrics


1993CH24      Phys.Rev. C48, 699 (1993)

E.Chavez-Lomeli, A.Dacal, M.E.Oritz, S.B.Gazes, Y.Chan, R.G.Stokstad, E.Plagnol, K.Siwek-Wilczynska, J.Wilczynski

16O Breakup in Quasielastic Reactions Near the Fermi Energy

NUCLEAR REACTIONS 197Au(16O, X), E=32.5 MeV/nucleon; measured (fragment)(fragment)-coin; deduced projectile breakup mechanism, σ for breakup into α+12C and other channels. Monte Carlo simulations.

doi: 10.1103/PhysRevC.48.699
Citations: PlumX Metrics


1993RO11      Phys.Rev. C47, R1831 (1993); Erratum Phys.Rev. C49, 2856 (1994)

R.B.Roberts, S.B.Gazes, J.E.Mason, M.Satteson, S.G.Teichmann, L.L.Lee, Jr., J.F.Liang, J.C.Mahon, R.J.Vojtech

Sub-Barrier One- and Two-Neutron Pickup Measurements in 32S + 93Nb, 98,100Mo Reactions at 180°

NUCLEAR REACTIONS 93Nb, 98,100Mo(32S, X), E ≤ 106 MeV; measured σ(θ), one-, two-neutron pickup; deduced angle-integrated σ, slope anomalies. DWBA analyses.

doi: 10.1103/PhysRevC.47.R1831
Citations: PlumX Metrics


1992GA03      Phys.Rev.Lett. 68, 150 (1992)

S.B.Gazes, J.E.Mason, R.B.Roberts, S.G.Teichmann

Direct Processes in 54-MeV 7Li Breakup Reactions on 12C and 197Au Targets, and the Extraction of Astrophysical Cross Sections

NUCLEAR REACTIONS 197Au, 12C(7Li, tα), E=54 MeV; measured αt-coin, Eα; deduced elastic breakup mechanism.

doi: 10.1103/PhysRevLett.68.150
Citations: PlumX Metrics


1992MA25      Phys.Rev. C45, 2870 (1992)

J.E.Mason, S.B.Gazes, R.B.Roberts, S.G.Teichmann

Coulomb and Nuclear Effects in Direct Breakup of 54-MeV 7Li + 12C, 197Au

NUCLEAR REACTIONS 197Au, 12C(7Li, tα), E=54 MeV; measured (αt)-coin; deduced direct projectile breakup yields, Coulomb, nuclear effects role. Three-body classical trajectory calculations.

doi: 10.1103/PhysRevC.45.2870
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1992TE02      Phys.Lett. 283B, 37 (1992)

S.G.Teichmann, S.B.Gazes, J.E.Mason, R.B.Roberts, H.J.Kim

Breakup-Fusion as a Source of Prompt Protons in Low-Energy 28Si + 98Mo, 58Ni Reactions

NUCLEAR REACTIONS 98Mo(28Si, X), E=180-254 MeV; 58Ni(28Si, X), E=190, 254 MeV; measured (evaporation residue)p-coin; deduced prompt proton production mechanism. Serber breakup-fusion model.

doi: 10.1016/0370-2693(92)91422-6
Citations: PlumX Metrics


1989PL02      Phys.Lett. 221B, 11 (1989)

E.Plagnol, L.Vinet, D.R.Bowman, Y.D.Chan, R.J.Charity, E.Chavez, S.B.Gazes, H.Han, W.L.Kehoe, M.A.McMahan, L.G.Moretto, R.G.Stokstad, G.J.Wozniak, G.Auger

Where has all the Fusion Gone...( Question )

NUCLEAR REACTIONS 12C, 27Al(40Ar, X), E=19.7 MeV/nucleon; measured σ(fragment θ), yields, charge distributions, kinetic energy spectra; deduced reaction mechanisms.

doi: 10.1016/0370-2693(89)90182-2
Citations: PlumX Metrics


1988GA11      Phys.Lett. 208B, 194 (1988)

S.B.Gazes, Y.D.Chan, E.Chavez, A.Dacal, M.E.Ortiz, K.Siwek-Wilczynska, J.Wilczynski, R.G.Stokstad

Neutron Pickup and Four-Body Processes in Reactions of 16O - 197Au at 26.5 and 32.5 MeV/Nucleon

NUCLEAR REACTIONS 197Au(16O, X), E=424, 520 MeV; measured (particle)(particle)-coin; deduced reaction mechanism.

doi: 10.1016/0370-2693(88)90416-9
Citations: PlumX Metrics


1988GA12      Phys.Rev. C38, 712 (1988)

S.B.Gazes, H.R.Schmidt, Y.Chan, E.Chavez, R.Kamermans, R.G.Stokstad

Stripping- and Pickup-Induced Breakup in 11- and 17-MeV/Nucleon 20Ne + 197Au Reactions

NUCLEAR REACTIONS 197Au(20Ne, X), E=220, 341 MeV; measured (fragment)p-, (fragment)α-coin; deduced reaction mechanism, projectile breakup.

doi: 10.1103/PhysRevC.38.712
Citations: PlumX Metrics


1988NO03      Phys.Rev.Lett. 60, 2246 (1988)

E.B.Norman, S.B.Gazes, S.G.Crane, D.A.Bennett

Tests of the Exponential Decay Law at Short and Long Times

RADIOACTIVITY 60Co, 56Mn(β-); measured γ-spectra, decay curves; deduced exponential law deviation limits.

doi: 10.1103/PhysRevLett.60.2246
Citations: PlumX Metrics


1987SI06      Phys.Rev. C35, 1316 (1987)

K.Siwek-Wilczynska, J.Wilczynski, C.R.Albiston, Y.Chan, E.Chavez, S.B.Gazes, H.R.Schmidt, R.G.Stokstad

Projectile-Breakup and Transfer-Reemission Reactions in the 12C + 20Ne System

NUCLEAR REACTIONS 12C(20Ne, α16O), 12C(20Ne, α20Ne), 12C(20Ne, α12C), E=157 MeV; measured (particle)(particle)-coin; deduced reaction mechanism. 20Ne, 16O, 24Mg deduced excitation energy.

doi: 10.1103/PhysRevC.35.1316
Citations: PlumX Metrics


1986SC29      Phys.Lett. 180B, 9 (1986)

H.R.Schmidt, S.B.Gazes, Y.Chan, R.Kamermans, R.G.Stokstad

Partition of Excitation Energy in Peripheral Heavy-Ion Reactions

NUCLEAR REACTIONS 197Au(20Ne, αX), E=220 MeV; measured α(projectile-like fragment)-coin; deduced excitation energy partition, mass transfer direction correlation.

doi: 10.1016/0370-2693(86)90124-3
Citations: PlumX Metrics


1986WI14      Phys.Lett. 181B, 229 (1986)

J.Wilczynski, K.Siwek-Wilczynska, Y.Chan, E.Chavez, S.B.Gazes, R.G.Stokstad

12C Decay of 24Mg following Nuclear Inelastic Scattering

NUCLEAR REACTIONS 12C(24Mg, 212C), E=15 MeV/nucleon; measured total energy spectrum, σ(θ), (12C)(12C)(θ). 24Mg level deduced J, π, 12C-decay characteristics. ΔE, position sensitive detectors.

doi: 10.1016/0370-2693(86)90037-7
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1985GA04      Phys.Lett. 153B, 33 (1985)

S.B.Gazes, R.P.Boisseau, L.Grodzins, A.P.Smith, S.G.Steadman

Prompt Proton Emission in Heavy-Ion-Induced Fusion Reactions below 10 MeV/Nucleon

NUCLEAR REACTIONS 93Nb(16O, pX), E=90, 135 MeV; measured σ(Ep), p(fragment)-coin. 96Mo(16O, pX), E=100-140 MeV; measured γ-multiplicity; deduced proton emission mechanism.

doi: 10.1016/0370-2693(85)91436-4
Citations: PlumX Metrics


1985SC28      Nucl.Instrum.Methods 242, 111 (1985)

H.R.Schmidt, M.Bantel, Y.Chan, S.B.Gazes, S.Wald, R.G.Stokstad

A Segmented Position-Sensitive Plastic Phoswich Detector

NUCLEAR REACTIONS 197Au(20Ne, α16O), (20Ne, 2α12C), E=11 MeV/nucleon; measured α(16O)-coin, energy correlations, αα12C-coin. Segmented position sensitive plastic phoswich detector.

doi: 10.1016/0168-9002(85)90894-0
Citations: PlumX Metrics


1985WA22      Phys.Rev. C32, 894 (1985)

S.Wald, S.B.Gazes, C.R.Albiston, Y.Chan, B.G.Harvey, M.J.Murphy, I.Tserruya, R.G.Stokstad, P.J.Countryman, K.Van Bibber, H.Homeyer

Transfer and Breakup Processes in Reactions of 11- and 17-MeV/nucleon 20Ne + 197Au

NUCLEAR REACTIONS 197Au(20Ne, X), E=220, 341 MeV; measured σ(fragment E, θ, Z) for X=Li, Be, B, C, N, O, F; deduced transfer, breakup, primary ejectile yields. Coincidence techniques.

doi: 10.1103/PhysRevC.32.894
Citations: PlumX Metrics


1985WI05      Phys.Rev. C31, 1315 (1985)

J.Wiggins, R.Brooks, M.Beckerman, S.B.Gazes, L.Grodzins, A.P.Smith, S.G.Steadman, Y.Xiao, F.Videbaek

One-Neutron Transfer in Ni-Ni Interactions below the Barrier

NUCLEAR REACTIONS 64Ni(58Ni, 59Ni), E=150-190 MeV; 58Ni(64Ni, 63Ni), 64Ni(64Ni, 65Ni), E=165-195 MeV; measured σ(Eγ, E). 63Ni levels deduced S for specified ejectile state. DWBA analysis, other data input.

doi: 10.1103/PhysRevC.31.1315
Citations: PlumX Metrics


1984AL25      Phys.Rev. C30, 1223 (1984)

H.A.Aljuwair, R.J.Ledoux, M.Beckerman, S.B.Gazes, J.Wiggins, E.R.Cosman, R.R.Betts, S.Saini, O.Hansen

Isotopic Effects in the Fusion of 40Ca with 40,44,48Ca

NUCLEAR REACTIONS, ICPND 44,48,40Ca(40Ca, X), E=90-135 MeV; measured fusion σ(E). Velocity filter.

doi: 10.1103/PhysRevC.30.1223
Citations: PlumX Metrics


1982KA08      Phys.Rev. C25, 1838 (1982)

J.S.Karp, S.G.Steadman, S.B.Gazes, R.Ledoux, F.Videbaek

Statistical Behavior of Nucleon Transfer to Highly Excited States in Heavy-Ion Collisions

NUCLEAR REACTIONS, ICPND 232Th(16O, X)10Be/11B/12C/13C/14C/15N, E=97, 105, 115, 125 MeV; deduced total σ, reaction σ. 181Ta, 232Th(15N, X), E=86, 95, 103 MeV; 181Ta(35Cl, X), E=205 MeV; measured σ(fragment θ, E) for X=9,10,11Be, 11,12,13B, 12,13,14,15,16C, 15,16,17N, 16,17,18,19O, 30,31,32Si, 31,32,33,34P, 33,34,35,36S, 36,37Cl; deduced reaction mechanism, dependence on transferred nucleon number, (Q)-dependence. Surprisal analysis.

doi: 10.1103/PhysRevC.25.1838
Citations: PlumX Metrics


1980DI07      Phys.Rev. C21, 2101 (1980)

A.C.DiRienzo, H.A.Enge, S.B.Gazes, M.K.Salomaa, A.Sperduto, W.Schier, H.E.Wegner

New Isotope 199Rn and Evidence for an Isomeric State 199Rn-m

RADIOACTIVITY 199Rn; measured Eα; deduced levels.

NUCLEAR REACTIONS 169Tm(35Cl, 5n), E=150-185 MeV; measured σ(Eα, E); deduced production σ for 199Rn.

doi: 10.1103/PhysRevC.21.2101
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