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NSR database version of May 22, 2024.

Search: Author = D.Utley

Found 16 matches.

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1997CI01      Phys.Rev. C55, 264 (1997)

J.Cibor, Z.Majka, T.Kozik, P.Staszel, Z.Sosin, K.Hagel, J.Li, L.Lou, R.Tezkratt, D.Utley, R.Wada, B.Xiao, J.B.Natowitz

Study of the Violent Collisions between 63Cu + 232Th at 35 MeV/nucleon

NUCLEAR REACTIONS 232Th(63Cu, X), (63Cu, F), E=35 MeV/nucleon; measured fission (fragment)(fragment)(θ), intermediate mass fragment-, neutron-, α-multiplicities; deduced hot, heavy composite nuclei decay, other aspects.

doi: 10.1103/PhysRevC.55.264
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1997MD01      Nucl.Phys. A627, 137 (1997)

N.Mdeiwayeh, R.Wada, K.Hagel, J.Li, Y.Lou, R.Tezkratt, D.Utley, B.Xiao, J.B.Natowitz, J.Cibor, Z.Majka

The Dependence of Fission Time-Scales on Fragment Mass Asymmetry in the 20Ne + 165Ho Reaction at 50A MeV

NUCLEAR REACTIONS 165Ho(20Ne, F), E=50 MeV/nucleon; fission (fragment)(α)-coin, multiplicities; deduced compound nucleus initial, scission energies. 178W deduced pre-scission times at high excitation. Monte Carlo simulation.

doi: 10.1016/S0375-9474(97)00408-9
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1997WA01      Phys.Rev. C55, 227 (1997)

R.Wada, R.Tezkratt, K.Hagel, F.Haddad, A.Kolomiets, Y.Lou, J.Li, M.Shimooka, S.Shlomo, D.Utley, B.Xiao, N.Mdeiwayeh, J.B.Natowitz, Z.Majka, J.Cibor, T.Kozik, Z.Sosin

Excitation Energies and Temperatures of Hot Nuclei Produced in the Reactions of 63Cu + 197Au at 35A MeV

NUCLEAR REACTIONS 197Au(63Cu, X), E=35 MeV/nucleon; measured energy, multiplicity of n, p, d, t, 3He, α, intermediate mass fragment (Z ≤ 10) heavy fragments (60 ≤ A ≤ 170)-coin, mass and velocity of heavy fragments; deduced temperatures, excitation energies of primary heavy fragments. Dynamical plus statistical model, QMD model simulations.

doi: 10.1103/PhysRevC.55.227
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1996CI07      Phys.Lett. 383B, 372 (1996)

M.Cinausero, G.Prete, D.Fabris, G.Nebbia, G.Viesti, G.X.Dai, K.Hagel, J.Li, Y.Lou, J.B.Natowitz, D.Utley, R.Wada, N.Gelli, F.Lucarelli, M.Colonna

Entrance Channel Mass Asymmetry and the Decay of Hot Nuclei

NUCLEAR REACTIONS 76Ge(86Kr, X), E=10 MeV/nucleon; 150Sm(16O, X), E=27 MeV/nucleon; measured α(evaporation residue)-coin, Eα, Iα; 100Mo(60Ni, X), E=655 MeV; analyzed data; deduced α-decay entrance channel mass asymmetry independence.

doi: 10.1016/0370-2693(96)00793-9
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1995DA33      Chin.J.Nucl.Phys. 17, No 3, 228 (1995)

G.X.Dai, J.B.Natowitz, R.Wada, K.Hagel, Q.Z.Luo, Z.Y.He, J.Blackadar, S.Lee, J.T.Li, Y.N.Lou, D.Utley, B.Xiao

Projectile Fragmentation in 20Ne + 165Ho Reaction at 45 MeV/u

NUCLEAR REACTIONS 165Ho(20Ne, X), E at 45 MeV/nucleon; measured fragment velocity energy, spectra for 3,4He, 6Li, 7,9Be, 10B, 12C, 14N, 16O; measured Fermi momentum reduced width. Projectile fragmentation.


1995LO02      Nucl.Phys. A581, 373 (1995)

Y.Lou, M.Gonin, R.Wada, K.Hagel, J.Li, B.Xiao, M.Gui, D.Utley, R.Tezkratt, L.Cooke, T.Botting, B.Hurst, D.O'Kelly, G.Mouchaty, R.P.Schmitt, W.Turmel, J.B.Natowitz, D.Fabris, G.Nebbia, G.Viesti, J.Ruiz, R.Burch, F.Gramegna, M.Poggi, G.Prete, M.E.Brandan, A.Menchaca-Rocha

Light-Particle Evaporation as a Function of Neutron Excess for Medium-Mass Compound Nuclei with E(x) ≈ 2 MeV/u

NUCLEAR REACTIONS 92,100Mo(63Cu, F), E=10 MeV/nucleon; 144,148,154Sm(20Ne, F), E=20 MeV/nucleon; measured fission (fragment)α-coin, proton, neutron, α-multiplicities, mass, total kinetic energy, linear momentum transfer distributions; deduced dynamic fission role. Statistical model analysis.

doi: 10.1016/0375-9474(94)00482-3
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1995SC55      Nucl.Instrum.Methods Phys.Res. A354, 487 (1995)

R.P.Schmitt, L.Cooke, G.Derrig, D.Fabris, B.Hurst, J.B.Natowitz, G.Nebbia, D.O'Kelly, B.K.Srivastava, W.Turmel, D.Utley, H.Utsunomiya, R.Wada

A Flexible 4π Neutron Detector for In-Beam Studies: The Texas A and M neutron ball

RADIOACTIVITY 252Cf(SF); measured neutron multiplicity distribution; deduced detector response. 4π ' neutron ball '. Monte Carlo simulations.

doi: 10.1016/0168-9002(94)01029-3
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1994HA34      Phys.Rev. C50, 2017 (1994)

K.Hagel, M.Gonin, R.Wada, J.B.Natowitz, F.Haddad, Y.Lou, M.Gui, D.Utley, B.Xiao, J.Li, G.Nebbia, D.Fabris, G.Prete, J.Ruiz, D.Drain, B.Chambon, B.Cheynis, D.Guinet, X.C.Hu, A.Demeyer, C.Pastor, A.Giorni, A.Lleres, P.Stassi, J.B.Viano, P.Gonthier

Violent Collisions and Multifragment Final States in the 40Ca + 40Ca Reaction at 35 MeV/nucleon

NUCLEAR REACTIONS 40Ca(40Ca, X), (40Ar, X), E=35 MeV/nucleon; measured fragment yield distributions, energy spectra, σ(fragment, θ), charged particle, neutron multiplicity; deduced charge distribution moments, multi-fragment probability, inpact parameter distributions. Quantum molecular dynamics model analysis. AMPHORA 4π charged particle detector, neutron ball.

doi: 10.1103/PhysRevC.50.2017
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1994UT01      Phys.Rev. C49, R1737 (1994)

D.Utley, R.Wada, K.Hagel, J.Li, X.Bin, M.Gui, Y.Lou, R.Tezkratt, J.B.Natowitz, M.Gonin

Excitation Energy Deposition in Central Collisions of 40A MeV 40Ar with 232Th

NUCLEAR REACTIONS 232Th(40Ar, X), E=40 MeV/nucleon; measured (fragment)n-coin; deduced excitation energy deposition features, reaction mechanism.

doi: 10.1103/PhysRevC.49.R1737
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1993GU09      Phys.Rev. C48, 1791 (1993)

M.Gui, K.Hagel, R.Wada, Y.Lou, D.Utley, B.Xiao, J.Li, J.B.Natowitz, G.Enders, W.Kuhn, V.Metag, R.Novotny, O.Schwalb, R.J.Charity, R.Freifelder, A.Gobbi, W.Henning, K.D.Hildenbrand, R.Mayer, R.S.Simon, J.P.Wessels, G.Casini, A.Olmi, A.A.Stefanini

Mass Asymmetry Dependence of Scission Times in the Reactions of 18.5 A MeV 136Xe + 48Ti

NUCLEAR REACTIONS 48Ti(136Xe, X), (136Xe, F), E=18.5 MeV/nucleon; measured (fragment)(fragment)-coin, σ(fragment A) vs total kinetic energy, fission (fragment)α-, (fragment)p-coin, multiplicities; deduced energies at scission.

doi: 10.1103/PhysRevC.48.1791
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1993NA14      Phys.Rev. C48, 2074 (1993)

J.B.Natowitz, J.C.Hagel, R.Wada, X.Bin, J.Li, Y.Lou, D.Utley

Intercalibration of 4He and 5Li Nuclear Thermometers for Hot Nuclei

NUCLEAR STRUCTURE A ≈ 120; analyzed different nuclear temperature determination methods; deduced state ratio method utility, 4He, 5Li detection based calibration features.

doi: 10.1103/PhysRevC.48.2074
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1992HA09      Phys.Rev.Lett. 68, 2141 (1992)

K.Hagel, M.Gonin, R.Wada, J.B.Natowitz, B.H.Sa, Y.Lou, M.Gui, D.Utley, G.Nebbia, D.Fabris, G.Prete, J.Ruiz, D.Drain, B.Chambon, B.Cheynis, D.Guinet, X.C.Hu, A.Demeyer, C.Pastor, A.Giorni, A.Lleres, P.Stassi, J.B.Viano, P.Gonthier

Multifragmentation of 40Ca + 40Ca

NUCLEAR REACTIONS 40Ca(40Ca, X), E=35 MeV/nucleon; measured fragment emission probability vs charge for different number of fragments; deduced multi-fragmentation mechanism. Different models.

doi: 10.1103/PhysRevLett.68.2141
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1992WA05      Nucl.Phys. A539, 316 (1992)

R.Wada, M.Gonin, M.Gui, K.Hagel, Y.Lou, D.Utley, J.B.Natowitz, G.Nebbia, D.Fabris, R.Billerey, B.Cheynis, A.Demeyer, D.Drain, D.Guinet, C.Pastor, L.Vagneron, K.Zaid, J.Alarja, A.Giorni, D.Heuer, C.Morand, B.Viano, C.Mazur, C.Ngo, S.Leray, R.Lucas, M.Ribrag, E.Tomasi

Mechanisms of Non-Equilibrium Light-Particle Emission in 32S + Ag Reactions at 30 A.MeV

NUCLEAR REACTIONS Ag(32S, X), E=30 MeV/nucleon; measured (fragment)(fragment)-coin, left-right asymmetries. Moving source fit, recoil effect, classical dynamical model. Solid state detector telescope, CSI(Tl) single crystal detectors.

doi: 10.1016/0375-9474(92)90273-M
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1992WA27      Nucl.Phys. A548, 471 (1992)

R.Wada, M.Gonin, M.Gui, K.Hagel, Y.Lou, D.Utley, B.Xiao, D.Miller, J.B.Natowitz, D.Fabris, G.Nebbia, R.Zanon, B.Chambon, B.Cheynis, A.Demeyer, D.Drain, D.Guinet, X.C.Hu, C.Pastor, K.Zaid, J.Alarja, R.Bertholet, A.Giorni, A.Lleres, C.Morand, P.Stassi, L.Schussler, B.Viano, P.Gonthier

Dynamical Aspects of Intermediate Mass Fragment Emission in the Reactions of 32S + Ag at 30 A.MeV

NUCLEAR REACTIONS Ag(32S, X), E=30 MeV/nucleon; measured σ(fragment θ, E), charge distribution of complex fragments, azimuthal angle correction. 4π detector. Statistical model, classical dynamical model calculations.

doi: 10.1016/0375-9474(92)90696-H
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1990NA26      Phys.Lett. 247B, 242 (1990)

J.B.Natowitz, M.Gonin, M.Gui, K.Hagel, Y.Lou, D.Utley, R.Wada

The Determination of Fission Time Scales from Excitation Function Data

NUCLEAR REACTIONS, ICPND 175Lu, 197Au, 165Ho, 141Pr(16O, F), 159Tb(22Ne, F), 169Tm(12C, F), E not given; analyzed fission σ(E); deduced fission probabilities, time distribution.

doi: 10.1016/0370-2693(90)90890-I
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1989GO11      Nucl.Phys. A495, 139c (1989)

M.Gonin, L.Cooke, B.Fornal, P.Gonthier, M.Gui, Y.Lou, J.B.Natowitz, G.Nardelli, G.Nebbia, G.Prete, R.P.Schmitt, B.Srivastava, W.Turmel, D.Utley, H.Utsunomiya, G.Viesti, R.Wada, B.Wilkins, R.Zanon

Thermal Properties and Dynamics of Hot Nuclei

NUCLEAR REACTIONS 100Mo(60Ni, X), E=655 MeV; calculated evaporated particle temperatures, α-, d-, p-, n-spectra. Ag(32S, X), (16O, X), E=30 MeV/nucleon; 154Sm(14N, X), E=19, 35 MeV/nucleon; calculated α-particle multiplicities.

doi: 10.1016/0375-9474(89)90314-X
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