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NSR database version of April 11, 2024.

Search: Author = E.Ramakrishnan

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2004TU04      Phys.Rev. C 70, 014608 (2004)

S.Turbide, L.Beaulieu, P.Danielewicz, V.E.Viola, R.Roy, K.Kwiatkowski, W.-C.Hsi, G.Wang, T.Lefort, D.S.Bracken, H.Breuer, E.Cornell, F.Gimeno-Nogues, D.S.Ginger, S.Gushue, R.Huang, R.Korteling, W.G.Lynch, K.B.Morley, E.Ramakrishnan, L.P.Remsberg, D.Rowland, M.B.Tsang, H.Xi, S.J.Yennello

Effects of in-medium cross sections and optical potential on thermal-source formation in p + 197Au reactions at 6.2-14.6 GeV/c

NUCLEAR REACTIONS 197Au(p, X), E at 6.4-14.6 GeV/c; measured light charged particle spectra, yields, charge distributions; deduced reaction mechanism features. Transport model.

doi: 10.1103/PhysRevC.70.014608
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2003RO11      Phys.Rev. C 67, 064602 (2003)

D.J.Rowland, R.Laforest, E.Ramakrishnan, M.Veselsky, E.M.Winchester, A.Ruangma, E.Martin, S.J.Yennello

Formation of excited systems with a wide range in N/Z

NUCLEAR REACTIONS 197Au(20F, X), (20Ne, X), (20Na, X), E=32 MeV/nucleon; measured fragments isotopic yields, excitation energies; deduced reaction mechanism features.

doi: 10.1103/PhysRevC.67.064602
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2002PI11      Phys.Rev. C65, 064606 (2002)

L.Pienkowski, K.Kwiatkowski, T.Lefort, W.-C.Hsi, L.Beaulieu, V.E.Viola, A.Botvina, R.G.Korteling, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, E.Winchester, S.J.Yennello, B.Back, H.Breuer, S.Gushue, L.P.Remsberg

Breakup Time Scale Studied in the 8 GeV/c π- + 197Au Reaction

NUCLEAR REACTIONS 197Au(π-, X), E at 8 GeV/c; measured fragments charge, energy, angular distributions; deduced breakup time scale, related reaction mechanism features.

doi: 10.1103/PhysRevC.65.064606
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2002RU12      Phys.Rev. C66, 044603 (2002)

A.Ruangma, R.Laforest, E.Martin, E.Ramakrishnan, D.J.Rowland, M.Veselsky, E.M.Winchester, S.J.Yennello, L.Beaulieu, W.-c.Hsi, K.Kwiatkowski, T.Lefort, V.E.Viola, A.Botvina, R.G.Korteling, L.Pienkowski, H.Breuer, S.Gushue, L.P.Remsberg, B.Back

Caloric curve of 8 GeV/c π-, p-bar + 197Au reactions

NUCLEAR REACTIONS 197Au(p-bar, X), (π-, X), E at 8 GeV/c; measured fragment spectra, yields ratios; deduced caloric curves. Comparison with model predictions.

doi: 10.1103/PhysRevC.66.044603
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2001BE05      Phys.Rev. C63, 031302 (2001)

L.Beaulieu, T.Lefort, K.Kwiatkowski, W.-c.Hsi, L.Pienkowski, R.G.Korteling, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, V.E.Viola, E.Winchester, S.J.Yennello

Testing Binomial Reducibility and Thermal Scaling in Hadron-Induced Multifragmentation

NUCLEAR REACTIONS 197Au(π-, X), E at 8 Gev/c; measured charged particle energy spectra, n-fold intermediate mass fragment probability distributions and emission times, single fragment emission probability, binomial parameters.

doi: 10.1103/PhysRevC.63.031302
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2001BE63      Phys.Rev. C64, 064604 (2001)

L.Beaulieu, T.Lefort, K.Kwiatkowski, W.-C.Hsi, G.Wang, D.S.Bracken, E.Cornell, D.S.Ginger, K.B.Morley, V.E.Viola, F.Gimeno-Nogues, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, E.Winchester, S.J.Yennello, R.G.Korteling, L.Pienkowski, H.Breuer, B.Back, S.Gushue, L.P.Remsberg, M.J.Huang, W.G.Lynch, M.B.Tsang, H.Xi

Thermal Excitation-Energy Deposition in 5-15 GeV/c Hadron-Induced Reactions with 197Au. II. Relation between Excitation Energy and Reaction Variables

NUCLEAR REACTIONS 197Au(p, X), (p-bar, X), (π-, X), E at 5.0-14.6 GeV/c; measured fragments charge distributions, longitudinal and transverse velocity, multiplicities; deduced source excitation energy, reaction mechanism features.

doi: 10.1103/PhysRevC.64.064604
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2001LE42      Phys.Rev. C64, 064603 (2001)

T.Lefort, L.Beaulieu, K.Kwiatkowski, W.-C.Hsi, V.E.Viola, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, E.Winchester, S.J.Yennello, L.Pienkowski, R.G.Korteling, H.Breuer

Thermal Excitation-Energy Deposition in 5-15 GeV/c Hadron-Induced Reactions with 197Au. I. Reconstruction of the Thermal Source Properties

NUCLEAR REACTIONS 197Au(p, X), (p-bar, X), (π-, X), E at 5.0-14.6 GeV/c; measured charged particle spectra, multiplicities, charge distributions; deduced thermal source excitation energy, related features.

doi: 10.1103/PhysRevC.64.064603
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2001VE01      Phys.Lett. 497B, 1 (2001)

M.Veselsky, R.W.Ibbotson, R.Laforest, E.Ramakrishnan, D.J.Rowland, A.Ruangma, E.M.Winchester, E.Martin, S.J.Yennello

Isospin Dependence of Isobaric Ratio Y(3(H)/Y(3He) and Its Relation to Temperature

NUCLEAR REACTIONS 112,124Sn(28Si, X), E=30, 50 MeV/nucleon; measured light, intermediate fragment yields, 3H/3He yield ratio vs excitation energy and quasiprojectile N/Z ratio; deduced source temperature.

doi: 10.1016/S0370-2693(00)01318-6
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2001VI02      Nucl.Phys. A681, 267c (2001)

V.E.Viola, T.Lefort, L.Beaulieu, K.Kwiatkowski, G.Wang, R.de Souza, L.Pienkowski, A.Botvina, H.Breuer, D.Durand, R.G.Korteling, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, E.Winchester, S.J.Yennello

Signals for the Transition from Liquid to Gas in Hot Nuclei

NUCLEAR REACTIONS 197Au(p, X), (p-bar, X), (π-, X), E at 5-15 GeV/c; measured intermediate mass fragments kinetic energy, correlation functions; deduced nuclear phase transition features.

doi: 10.1016/S0375-9474(00)00526-1
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2001WI01      Phys.Rev. C63, 014601 (2001)

E.M.Winchester, J.A.Winger, R.Laforest, E.Martin, E.Ramakrishnan, D.J.Rowland, A.Ruangma, S.J.Yennello, G.D.Westfall, A.Vander Molen, E.Norbeck

Effect of System N/Z on the Enhanced Production of Even-Z Fragments Observed in Heavy Ion Reactions

NUCLEAR REACTIONS 58Fe, 58Ni(40Ar, X), (40Cl, X), (40Ca, X), E=25 MeV/nucleon; measured fragments isotopic yields, charge distributions; deduced enhancement of even-Z fragments, effect of system charge-to-mass ratio.

doi: 10.1103/PhysRevC.63.014601
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2001YE01      Nucl.Phys. A681, 317c (2001)

S.J.Yennello, M.Veselsky, R.Laforest, D.Rowland, E.Ramakrishnan, A.Ruangma, E.M.Winchester, E.Martin

Distribution of Isospin during Fragmentation of Excited Quasiprojectiles from the Reactions of 28Si + 112, 124Sn at 30 and 50 MeV/nucleon

NUCLEAR REACTIONS 112,124Sn(28Si, X), E=30, 50 MeV/nucleon; measured quasiprojectile mass distributions, light fragment yields; deduced isospin dependence of charged particle multiplicity.

doi: 10.1016/S0375-9474(00)00534-0
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2000BE27      Phys.Rev.Lett. 84, 5971 (2000)

L.Beaulieu, T.Lefort, K.Kwiatkowski, R.T.de Souza, W.-C.Hsi, L.Pienkowski, B.Back, D.D.Bracken, H.Breuer, E.Cornell, F.Gimeno-Nogues, D.S.Ginger, S.Gushue, R.G.Korteling, R.Laforest, E.Martin, K.B.Morley, E.Ramakrishnan, L.P.Remsberg, D.Rowland, A.Ruangma, V.E.Viola, G.Wang, E.Winchester, S.J.Yennello

Signals for a Transition from Surface to Bulk Emission in Thermal Multifragmentation

NUCLEAR REACTIONS 197Au(π-, X), E at 8-9.2 GeV/c; 197Au(p, X), E at 10.2 GeV/c; measured intermediate mass fragments correlation functions vs excitation energy; deduced transition between surface and bulk emission of fragments.

doi: 10.1103/PhysRevLett.84.5971
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2000LE29      Phys.Rev. C62, 031604 (2000)

T.Lefort, L.Beaulieu, A.Botvina, D.Durand, K.Kwiatkowski, W.-c.Hsi, L.Pienkowski, H.Breuer, R.G.Korteling, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, V.E.Viola, E.Winchester, S.J.Yennello

Thermal Expansion Effects in the 8 GeV/c π- + 197Au Reaction

NUCLEAR REACTIONS 197Au(π-, X), E at 8 GeV/c; measured fragments charge, kinetic energy spectra; deduced thermal expansion effects. Comparison with statistical multifragmentation models.

doi: 10.1103/PhysRevC.62.031604
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2000MA54      Phys.Rev. C62, 027601 (2000)

E.Martin, R.Laforest, E.Ramakrishnan, D.J.Rowland, A.Ruangma, E.M.Winchester, S.J.Yennello

Transition in Isospin Behavior between Light and Heavy Fragments Emitted from Excited Nuclear Systems

NUCLEAR REACTIONS Xe(p, X), E=80-350 GeV; 58Ni, 58Fe(58Ni, X), (58Fe, X), E=30 MeV/nucleon; C, Ni, Ag, Ho(14N, X), E=35 MeV/nucleon; analyzed fragments N/Z ratio; deduced systematic features.

doi: 10.1103/PhysRevC.62.027601
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2000VE06      Phys.Rev. C62, 041605 (2000)

M.Veselsky, R.W.Ibbotson, R.Laforest, E.Ramakrishnan, D.J.Rowland, A.Ruangma, E.M.Winchester, E.Martin, S.J.Yennello

Inhomogeneous Isospin Distribution in the Reactions of 28Si + 112Sn and 124Sn at 30 and 50 MeV/nucleon

NUCLEAR REACTIONS 112,124Sn(28Si, X), E=30, 50 MeV/nucleon; measured light charged particles, intermediate mass fragments N/Z distribution, multiplicities, 3H/3He yield ratios; deduced quasiprojectile features.

doi: 10.1103/PhysRevC.62.041605
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2000VE08      Phys.Rev. C62, 064613 (2000)

M.Veselsky, R.W.Ibbotson, R.Laforest, E.Ramakrishnan, D.J.Rowland, A.Ruangma, E.M.Winchester, E.Martin, S.J.Yennello

Effect of Nucleon Exchange on Projectile Multifragmentation in the Reactions of 28Si + 112Sn and 124Sn at 30 and 50 MeV/nucleon

NUCLEAR REACTIONS 112,124Sn(28Si, X), E=30, 50 MeV/nucleon; measured fragments isotopic yields, velocity distributions; deduced nucleon exchange effects, quasiprojectile mass, charge, excitation energy. Comparison with Monte Carlo simulation.

doi: 10.1103/PhysRevC.62.064613
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1999BE49      Phys.Lett. 463B, 159 (1999)

L.Beaulieu, K.Kwiatkowski, W.-C.Hsi, T.Lefort, L.Pienkowski, R.G.Korteling, G.Wang, B.Back, D.S.Bracken, H.Breuer, E.Cornell, F.Gimeno-Nogues, D.S.Ginger, S.Gushue, M.J.Huang, R.Laforest, W.G.Lynch, E.Martin, K.B.Morley, L.P.Remsberg, D.Rowland, E.Ramakrishnan, A.Ruangma, M.B.Tsang, V.E.Viola, E.Winchester, H.Xi, S.J.Yennello

Thermal Excitation of Heavy Nuclei with 5-15 GeV/c Antiproton, Proton and Pion Beams

NUCLEAR REACTIONS 197Au(p, X), (p-bar, X), (π-, X), E at 5-15 GeV/c; measured excitation energy spectra, intermediate mass fragments yields.

doi: 10.1016/S0370-2693(99)01016-3
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1999HS01      Phys.Rev. C60, 034609 (1999)

W.-C.Hsi, K.Kwiatkowski, G.Wang, D.S.Bracken, E.Cornell, D.S.Ginger, V.E.Viola, R.G.Korteling, K.B.Morley, R.Huang, W.G.Lynch, M.B.Tsang, H.Xi, F.Gimeno-Nogues, E.Ramakrishnan, D.Rowland, S.J.Yennello, H.Breuer, S.Gushue, L.P.Remsberg, A.Botvina, W.A.Friedman

Exclusive Studies of Angular Distributions in GeV Hadron-Induced Reactions with 197Au

NUCLEAR REACTIONS 197Au(p, X), E at 6-14.6 GeV/c; 197Au(π-, X), E at 5-9.2 GeV/c; measured intermediate mass fragments σ(E, θ), angular correlations; deduced kinematic-focusing origin of sideways peaking. ISiS array.

doi: 10.1103/PhysRevC.60.034609
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1999KW07      Nucl.Phys. (Supplement) A654, 786c (1999)

K.Kwiatkowski, W.-C.Hsi, G.Wang, T.Lefort, D.S.Bracken, E.Cornell, E.Renshaw Foxford, D.S.Ginger, V.E.Viola, N.R.Yoder, R.G.Korteling, E.C.Pollacco, R.Legrain, C.Volant, F.Gimeno-Nogues, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, E.Winchester, S.J.Yennello, W.G.Lynch, M.B.Tsang, H.Xi, H.Breuer, K.B.Morley, S.Gushue, L.P.Remsberg, L.Pienkowski, J.Brzychczyk, A.Botvina, W.A.Friedman

Multifragmentation with GeV Light-Ion Beams

NUCLEAR REACTIONS 197Au(3He, X), E=4.8 GeV; measured intermediate mass fragment velocities and correlations, compound excitation energy probabilities. 197Au(p-bar, X), E at 8 GeV/c; measured light charged particles and intermediate mass fragments multiplicity distributions. Comparison between both reactions.

doi: 10.1016/S0375-9474(00)88547-4
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1999LA09      Phys.Rev. C59, 2567 (1999)

R.Laforest, E.Ramakrishnan, D.J.Rowland, A.Ruangma, E.M.Winchester, E.Martin, S.J.Yennello

Dependence of Projectile Fragmentation on Target N/Z

NUCLEAR REACTIONS 112,124Sn(28Si, X), E=30, 50 MeV/nucleon; measured light, intermediate fragments charge, multiplicity distributions, velocity spectra, isotopic yield ratios; deduced fragmentation dependence on target N/Z.

doi: 10.1103/PhysRevC.59.2567
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1999LE34      Nucl.Phys. A655, 275c (1999)

T.LeFort, K.Kwiatkowski, W.-C.Hsi, L.Beaulieu, V.E.Viola, L.Pienkowski, R.G.Korteling, R.Laforest, E.Martin, E.Ramakrishnan, D.Rowland, A.Ruangma, E.Winchester, S.J.Yennello, S.Gushue, L.P.Remsberg, B.Back, H.Breuer

Heating Nuclei with 8 GeV/c Antiprotons

NUCLEAR REACTIONS 197Au(p-bar, X), (π-, X), E at 8 GeV/c; measured charged-particle multiplicity, intermediate mass fragments energy distributions; deduced energy deposition features.

doi: 10.1016/S0375-9474(99)00213-4
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1999LE53      Phys.Rev.Lett. 83, 4033 (1999)

T.Lefort, K.Kwiatkowski, W.-C.Hsi, L.Pienkowski, L.Beaulieu, B.Back, H.Breuer, S.Gushue, R.G.Korteling, R.Laforest, E.Martin, E.Ramakrishnan, L.P.Remsberg, D.Rowland, A.Ruangma, V.E.Viola, E.Winchester, S.J.Yennello

Heating 197Au Nuclei with 8 GeV/c Antiproton and π- Beams

NUCLEAR REACTIONS 197Au(p-bar, X), (π-, X), E at 8 GeV/c; measured charged particle and intermediate mass fragment multiplicities, energy deposition and excitation energy probabilities, excitation energy and mass distributions of target-like fragments. Intranuclear cascade calculations.

doi: 10.1103/PhysRevLett.83.4033
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1999TH01      Phys.Rev. C59, 111 (1999)

M.Thoennessen, S.Yokoyama, A.Azhari, T.Baumann, J.A.Brown, A.Galonsky, P.G.Hansen, J.H.Kelley, R.A.Kryger, E.Ramakrishnan, P.Thirolf

Population of 10Li by Fragmentation

NUCLEAR REACTIONS 9Be(18O, X)10Li, E=80 MeV/nucleon; measured n-9Li relative velocity spectra. 10Li deduced low-lying s-wave strength.

doi: 10.1103/PhysRevC.59.111
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1998AZ01      Phys.Rev. C57, 628 (1998)

A.Azhari, T.Baumann, J.A.Brown, M.Hellstrom, J.H.Kelley, R.A.Kryger, D.J.Millener, H.Madani, E.Ramakrishnan, D.E.Russ, T.Suomijarvi, M.Thoennessen, S.Yokoyama

Proton Decay of States in 11N

NUCLEAR REACTIONS 9Be(12N, 11N), E=40 MeV/nucleon; measured projectile-like fragment decay p(10C)-coin. 11N deduced levels J, π, Γ, proton decay branching ratios.

doi: 10.1103/PhysRevC.57.628
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1998BA37      Nucl.Phys. A635, 428 (1998)

T.Baumann, E.Ramakrishnan, A.Azhari, J.R.Beene, R.J.Charity, J.F.Dempsey, M.L.Halbert, P.-F.Hua, R.A.Kryger, P.E.Mueller, R.Pfaff, D.G.Sarantites, L.G.Sobotka, D.W.Stracener, M.Thoennessen, G.Van Buren, R.L.Varner, S.Yokoyama

Evolution of the Giant Dipole Resonance in Excited 120Sn and 208Pb Nuclei Populated by Inelastic Alpha Scattering

NUCLEAR REACTIONS 120Sn(α, α'), E=40, 50 MeV/nucleon; 208Pb(α, α'), E=40 MeV/nucleon; measured Eγ, Iγ, Eα, Iα, αγ-coin. 120Sn, 208Pb deduced GDR width vs temperature, shape effects. Adiabatic coupling model.

doi: 10.1016/S0375-9474(98)00197-3
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1998HS01      Phys.Rev. C58, R13 (1998)

W.-C.Hsi, K.Kwiatkowski, G.Wang, D.S.Bracken, E.Cornell, D.S.Ginger, V.E.Viola, N.R.Yoder, R.G.Korteling, F.Gimeno-Nogues, E.Ramakrishnan, D.Rowland, S.J.Yennello, R.Huang, W.G.Lynch, M.B.Tsang, H.Xi, H.Breuer, K.B.Morley, S.Gushue, L.P.Remsberg, W.A.Friedman, A.Botvina

Sideways-Peaked Angular Distributions in Hadron-Induced Multifragmentation: Shock waves, geometry, or kinematics ?

NUCLEAR REACTIONS 197Au(p, X), E at 6, 10, 12.8, 14.6 GeV/c; 197Au(π-, X), E at 5, 8.2, 9.2 GeV/c; measured intermediate mass fragments σ(θ), multiplicity; deduced kinematic explanation for sideways peaking.

doi: 10.1103/PhysRevC.58.R13
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1998KW01      Nucl.Phys. A630, 168c (1998)

K.Kwiatkowski, W.-C.Hsi, V.E.Viola, G.Wang, D.S.Bracken, H.Breuer, E.Cornell, E.Renshaw Foxford, F.Gimeno-Nogues, D.S.Ginger, S.Gushue, R.G.Korteling, W.G.Lynch, K.B.Morley, E.C.Pollacco, E.Ramakrishnan, L.P.Remsberg, M.B.Tsang, C.Volant, S.J.Yennello, H.Xi, N.R.Yoder, and the ISiS Collaboration

Multifragmentation: Thermal vs. dynamic effects

NUCLEAR REACTIONS Ag, 197Au(3He, X), E=4.8 GeV; analyzed data; deduced reaction thermal features, dynamic effects. Other reactions discussed.

doi: 10.1016/S0375-9474(97)00753-7
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1998RA07      Phys.Rev. C57, 1803 (1998)

E.Ramakrishnan, H.Johnston, F.Gimeno-Nogues, D.J.Rowland, R.Laforest, Y.-W.Lui, S.Ferro, S.Vasal, S.J.Yennello

Fragment Emission from the Mass-Symmetric Reactions 58Fe, 58Ni + 58Fe, 58Ni at E(beam) = 30 MeV/nucleon

NUCLEAR REACTIONS 58Fe, 58Ni(58Fe, X), (58Ni, X), E=30 MeV/nucleon; measured intermediate mass fragments yields, angular distributions; deduced reaction mechanism features. Moving source analysis, model calculations.

doi: 10.1103/PhysRevC.57.1803
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1997BA41      Acta Phys.Pol. B28, 197 (1997)

T.Baumann, E.Ramakrishnan, M.Thoennessen

Giant Dipole Resonance in Excited 120Sn and 208Pb Nuclei Populated by Inelastic Alpha Scattering

NUCLEAR STRUCTURE 120Sn, 208Pb; analyzed Γ(GDR) vs excitation energy. Adiabatic coupling, collisional models.


1997HS02      Phys.Rev.Lett. 79, 817 (1997)

W.-C.Hsi, K.Kwiatkowski, G.Wang, D.S.Bracken, E.Cornell, D.S.Ginger, V.E.Viola, N.R.Yoder, R.G.Korteling, F.Gimeno-Nogues, E.Ramakrishnan, D.Rowland, S.J.Yennello, M.J.Huang, W.G.Lynch, M.B.Tsang, H.Xi, Y.Y.Chu, S.Gushue, L.P.Remsberg, K.B.Morley, H.Breuer

Formation of Hot Nuclei with GeV p and π- Beams

NUCLEAR REACTIONS 197Au(p, X), E at 6-14.6 GeV/c; 197Au(π-, X), E at 5-9.2 GeV/c; measured charged particles, intermediate mass fragments probability distributions; deduced deposition energy saturation related features. High acceptance detector array.

doi: 10.1103/PhysRevLett.79.817
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1997JO14      Phys.Rev. C56, 1972 (1997)

H.Johnston, T.White, B.A.Li, E.Ramakrishnan, J.Winger, D.J.Rowland, B.Hurst, F.Gimeno-Nogues, D.O'Kelly, Y.-W.Lui, S.J.Yennello

Isotopically Resolved Intermediate-Mass Fragment and Light Charged Particle Production from the Reactions 40Ar and 40Ca with 58Fe and 58Ni at E(beam) = 33 and 45 MeV/nucleon

NUCLEAR REACTIONS 58Ni(40Ar, X), 58Fe(40Ca, X), E=33, 45 MeV/nucleon; measured neutron multiplicity, intermediate mass fragment σ(E(fragment), θ, Z); deduced reaction mechanism features. Several models compared.

doi: 10.1103/PhysRevC.56.1972
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1997VI10      Nucl.Phys. A626, 287c (1997)

V.E.Viola, W.-C.Hsi, K.Kwiatkowski, G.Wang, D.S.Bracken, H.Breuer, J.Brzychczyk, Y.Y.Chu, E.Cornell, E.Renshaw Foxford, F.Gimeno-Nogues, D.Ginger, S.Gushue, M.J.Huang, R.G.Korteling, R.Legrain, W.G.Lynch, K.B.Morley, E.C.Pollacco, E.Ramakrishnan, L.P.Remsberg, D.Rowland, M.B.Tsang, C.Volant, H.Xi, S.J.Yennello, N.R.Yoder

Probing the Nuclear EOS with GeV Light-Ion Beams

NUCLEAR REACTIONS 197Au(p, X), E at 6-14.6 GeV/c; 197Au(π-, X), E at 5-9.2 GeV/c; measured light-, intermediate mass fragment multiplicity distributions; deduced deposition energy saturation features. 197Au(3He, X), E=4.8 GeV; measured fragment correlations, excitation energy distributions; deduced reaction mechanism. Multifragmentation.

doi: 10.1016/S0375-9474(97)00549-6
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1996KE16      Phys.Rev.Lett. 77, 5020 (1996)

J.H.Kelley, S.M.Austin, A.Azhari, D.Bazin, J.A.Brown, H.Esbensen, M.Fauerbach, M.Hellstrom, S.E.Hirzebruch, R.A.Kryger, D.J.Morrissey, R.Pfaff, C.F.Powell, E.Ramakrishnan, B.M.Sherrill, M.Steiner, T.Suomijarvi, M.Thoennessen

Study of the Breakup Reaction 8B → 7Be + p: Absorption effects and E2 strength

NUCLEAR REACTIONS 9Be, 197Au(8B, p7Be), E=41 MeV/nucleon; measured parallel, transverse momenta. Models comparison.

doi: 10.1103/PhysRevLett.77.5020
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1996KO14      Phys.Rev. C54, R472 (1996)

A.Kolomiets, E.Ramakrishnan, H.Johnston, F.Gimeno-Nogues, B.Hurst, D.O'Kelly, D.J.Rowland, S.Shlomo, T.White, J.Winger, S.J.Yennello

Nuclear Temperature of the Disassembling Source in Central Heavy-Ion Collisions from Isotope Yields

NUCLEAR REACTIONS 58Ni, 58Fe(40Ca, X), (40Ar, X), E=33 MeV/nucleon; analyzed isotopic yields for Z=2-6 isotopes; deduced nuclear temperature. Statistical model approach.

doi: 10.1103/PhysRevC.54.R472
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1996RA15      Nucl.Phys. A599, 49c (1996)

E.Ramakrishnan, T.Baumann, A.Azhari, R.A.Kryger, R.Pfaff, M.Thoennessen, S.Yokoyama, J.R.Beene, M.L.Halbert, P.E.Mueller, D.W.Stracener, R.L.Varner, G.Van Buren, R.J.Charity, J.F.Dempsey, P.-F.Hua, D.G.Sarantites, L.G.Sobotka

Giant Dipole Resonance in Excited 120Sn and 208Pb Nuclei Populated by Inelastic Alpha Scattering

NUCLEAR REACTIONS 120Sn(α, α'), (α, X), E=40, 50 MeV/nucleon; 208Pb(α, α'), (α, X), E=40 MeV/nucleon; measured αγ-coin. 120Sn, 208Pb deduced GDR width vs excitation.

doi: 10.1016/0375-9474(96)00046-2
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1996RA20      Phys.Rev.Lett. 76, 2025 (1996)

E.Ramakrishnan, T.Baumann, A.Azhari, R.A.Kryger, R.Pfaff, M.Thoennessen, S.Yokoyama, J.R.Beene, M.L.Halbert, P.E.Mueller, D.W.Stracener, R.L.Varner, R.J.Charity, J.F.Dempsey, D.G.Sarantites, L.G.Sobotka

Giant Dipole Resonance Built on Highly Excited States of 120Sn Nuclei Populated by Inelastic α Scattering

NUCLEAR REACTIONS 120Sn(α, α'), E=40, 50 MeV/nucleon; measured γα-coin. 120Sn deduced GDR built on highly excited states, width.

doi: 10.1103/PhysRevLett.76.2025
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1996RA36      Phys.Lett. 383B, 252 (1996)

E.Ramakrishnan, A.Azhari, J.R.Beene, R.J.Charity, M.L.Halbert, P.-F.Hua, R.A.Kryger, P.E.Mueller, R.Pfaff, D.G.Sarantites, L.G.Sobotka, M.Thoennessen, G.Van Buren, R.L.Varner, S.Yokoyama

Temperature Dependence of the Giant Dipole Resonance Width in 208Pb

NUCLEAR REACTIONS 208Pb(α, α'), E=40 MeV/nucleon; measured α-spectra, γγ-coin. 208Pb deduced GDR width temperature dependence.

doi: 10.1016/0370-2693(96)00746-0
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1995BL20      Phys.Lett. 362B, 34 (1995)

J.Blomgren, K.Lindh, N.Anantaraman, S.M.Austin, G.P.A.Berg, B.A.Brown, J.-M.Casandjian, M.Chartier, M.D.Cortina-Gil, S.Fortier, M.Hellstrom, J.R.Jongman, J.H.Kelley, A.Lepine-Szily, I.Lhenry, M.Mac Cormick, W.Mittig, J.Nilsson, N.Olsson, N.A.Orr, E.Ramakrishnan, P.Roussel-Chomaz, B.M.Sherrill, P.-E.Tegner, J.S.Winfield, J.A.Winger

Search for Double Gamow-Teller Strength by Heavy-Ion Double Charge Exchange

NUCLEAR REACTIONS 24Mg(18O, 18Ne), E=76 MeV/nucleon; measured σ(θ, E(cm)); deduced σ(θ), double Gamow-Teller excitation suppression evidence.

doi: 10.1016/0370-2693(95)01190-2
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1995KR03      Phys.Rev.Lett. 74, 860 (1995)

R.A.Kryger, A.Azhari, M.Hellstrom, J.H.Kelley, T.Kubo, R.Pfaff, E.Ramakrishnan, B.M.Sherrill, M.Thoennessen, S.Yokoyama, R.J.Charity, J.Dempsey, A.Kirov, N.Robertson, D.G.Sarantites, L.G.Sobotka, J.A.Winger

Two-Proton Emission from the Ground State of 12O

RADIOACTIVITY 12O(2p) [from 9Be(13O, 12O), secondary beam from 9Be(16O, X), projectile fragmentation]; measured (2p)(12C)-coin decay energy; deduced 2He emission upper limit, branching ratio.

doi: 10.1103/PhysRevLett.74.860
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1995KR24      Nucl.Instrum.Methods Phys.Res. B99, 312 (1995)

R.A.Kryger, A.Azhari, M.Hellstrom, J.H.Kelley, T.Kubo, R.Pfaff, E.Ramakrishnan, B.M.Sherrill, M.Thoennessen, S.Yokoyama, R.J.Charity, J.Dempsey, A.Kirov, N.Robertson, D.G.Sarantites, L.G.Sobotka, J.A.Winger

Studies of Light Nuclei Beyond the Particle Driplines: The two-proton emitter 12O

NUCLEAR REACTIONS 9Be(13O, 12O), E=33.4 MeV/nucleon; measured (10C)(2p)-coin events relative energy, (10C)(2p)(θ) following ejectile breakup; deduced ejectile breakup mechanism related features. 12O deduced no 2He emission evidence.

doi: 10.1016/0168-583X(95)00337-1
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1995TH03      Phys.Rev. C51, 3148 (1995)

M.Thoennessen, E.Ramakrishnan, J.R.Beene, F.E.Bertrand, M.L.Halbert, D.J.Horen, P.E.Mueller, R.L.Varner

Dynamical Effects in Fusion Reactions Forming 110Sn

NUCLEAR REACTIONS 92Mo(18O, X), E=72 MeV; 60Ni(50Ti, X), E=163 MeV; measured Eγ, Iγ; deduced entrance channel effects, fusion reactions dissipation timescale. 110Sn deduced GDR decay features, Γ, time dependence of deformation, shape. Dissipative dynamics calculations.

doi: 10.1103/PhysRevC.51.3148
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1994KR21      Nucl.Instrum.Methods Phys.Res. A346, 544 (1994)

R.A.Kryger, A.Azhari, E.Ramakrishnan, M.Thoennessen, S.Yokoyama

Efficiency of a BaF2 Scintillator Detector for 15-150 MeV Neutrons

doi: 10.1016/0168-9002(94)90589-4
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1993KR09      Phys.Rev. C47, R2439 (1993)

R.A.Kryger, A.Azhari, A.Galonsky, J.H.Kelley, R.Pfaff, E.Ramakrishnan, D.Sackett, B.M.Sherrill, M.Thoennessen, J.A.Winger, S.Yokoyama

Neutron Decay of 10Li Produced by Fragmentation

NUCLEAR REACTIONS C(18O, X), E=80 MeV/nucleon; measured n(9Li)-coin. 10Li deduced level, neutron decay features.

doi: 10.1103/PhysRevC.47.R2439
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