NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = S.R.Souza Found 44 matches. 2022SO16 Phys.Rev. C 106, 034606 (2022) S.R.Souza, R.Donangelo, W.G.Lynch, M.B.Tsang Constraints from isoscaling on the source size in energetic heavy ion collisions NUCLEAR REACTIONS 112Sn(124Sn, X)2H/3H/3He/4He/6Li/7Li, 124Sn(112Sn, X)2H/3H/3He/4He/6Li/7Li, T=5 MeV; calculated probability of observing selected product with a given multiplicity in each HI collision event, ratio between the probabilities of finding n fragments of a given reaction product in each event, produced by two similar sources. The probabilities used in the calculations are found to be well approximated by a Poisson distribution. Grand-canonical version of the statistical multifragmentation model. Comparison to experimental data.
doi: 10.1103/PhysRevC.106.034606
2020SO20 Phys.Rev. C 102, 044611 (2020) Isobar correlations bearing information on the properties of hot disassembling nuclear sources
doi: 10.1103/PhysRevC.102.044611
2019SO12 Nucl.Phys. A989, 69 (2019) S.R.Souza, B.V.Carlson, R.Donangelo Post breakup dynamical evolution of fragments produced in nuclear multifragmentation NUCLEAR REACTIONS 112Sn(112Sn, x)168Re; calculated proton, deuteron, triton multiplicity evolutions (and also those for 3He, 9,11,12,13C), d-d correlation function, d-d pair total momentum at initial moment and at long (infinite) time using hybrid model based on Statistical Multifragmentation Model (SMM) and GEMINI++ code
doi: 10.1016/j.nuclphysa.2019.05.017
2018KO22 Phys.Rev. C 98, 044604 (2018) G.D.Kolinger, L.F.Canto, R.Donangelo, S.R.Souza Semiclassical calculations of complete and incomplete fusion in collisions of weakly bound nuclei NUCLEAR REACTIONS 159Tb, 197Au(6Li, X), (7Li, X), E(cm)=20-42 MeV; calculated complete fusion (CF) and total fusion (TF) σ(E) using an improved version of a semiclassical coupled-channels method. Comparison with experimental values, and with previous theoretical predictions.
doi: 10.1103/PhysRevC.98.044604
2018SO02 Phys.Rev. C 97, 034614 (2018) S.R.Souza, R.Donangelo, W.G.Lynch, M.B.Tsang Dynamical and many-body correlation effects in the kinetic energy spectra of isotopes produced in nuclear multifragmentation NUCLEAR REACTIONS 112Sn(112Sn, X), E not given; calculated kinetic energy spectra of Z=2-7, A=3-20 fragments, and compared to experimental data. 9Be(3He, X)12C*, E<150 MeV; calculated fusion σ(E). Hybrid model based on Monte-Carlo implementation of statistical multifragmentation model, with the Weisskopf-Ewing evaporation treatment for fragment de-excitation.
doi: 10.1103/PhysRevC.97.034614
2018SO06 Phys.Rev. C 97, 054619 (2018) Isotopic dependence of the fragments' internal temperatures determined from multifragment emission NUCLEAR REACTIONS 112Sn(112Sn, X), (112Ba, X), E*=4, 10 MeV/nucleon; calculated excitation energy distribution, internal temperatures and density of states for light primary fragments from breakup of excited 112Sn and 112Ba using the statistical multifragmentation model with discrete energy (SMM-DE); deduced mass dependence of fragment internal temperature.
doi: 10.1103/PhysRevC.97.054619
2017SO11 Phys.Rev. C 96, 014616 (2017) S.R.Souza, M.B.Tsang, R.Donangelo Many-particle correlations and Coulomb effects on temperatures from fragment momentum fluctuations
doi: 10.1103/PhysRevC.96.014616
2016LI24 Nucl.Phys. A952, 18 (2016) C.Li, S.R.Souza, M.B.Tsang, F.-S.Zhang Nuclear energy release from fragmentation NUCLEAR STRUCTURE 230,232Th, 235,238U; calculated energy release for fission or splitting into fragments with nearly equal size; deduced maximal energy release at splitting into three fragments.
doi: 10.1016/j.nuclphysa.2016.04.002
2015SO18 Phys.Rev. C 92, 024612 (2015) S.R.Souza, B.V.Carlson, R.Donangelo, W.G.Lynch, M.B.Tsang Internal and kinetic temperatures of fragments in the framework of a nuclear statistical multifragmentation model NUCLEAR STRUCTURE 40Ca, 80Zr, 120Nd; calculated breakup temperature as function of excitation energy (E*/A), internal temperature for selected fragments of 4He, 5Li, 10B, 12C, 16O, average excitation energy per nucleon of fragments as function of mass number A. Density of states of fragments from their internal temperatures and excitation energies. Statistical multifragmentation model.
doi: 10.1103/PhysRevC.92.024612
2014CA42 Phys.Rev. C 90, 054616 (2014) N.L.Calleya, S.R.Souza, B.V.Carlson, R.Donangelo, W.G.Lynch, M.B.Tsang, J.R.Winkelbauer Influence of the density of states on the odd-even staggering in the charge distribution of the emitted fragments in nuclear heavy-ion collisions NUCLEAR STRUCTURE 40Ca, 80Zr; calculated effect of density of states on odd-even staggering in charge distribution of fragments emitted in the breakup of 40Ca and 80Zr nuclei at E=1.5-4 MeV/nucleon excitation energies. Statistical Multifragmentation Model (SMM) considering pairing gaps for state densities.
doi: 10.1103/PhysRevC.90.054616
2013SO18 Phys.Rev. C 88, 014607 (2013) S.R.Souza, B.V.Carlson, R.Donangelo, W.G.Lynch, M.B.Tsang Statistical multifragmentation model with discretized energy and the generalized Fermi breakup: Formulation of the model NUCLEAR REACTIONS 20Ne(20Ne, X)40Ca* at 2-7 MeV/nucleon; calculated yields distributions of Z=1-20 primary fragments from 40Ca breakup, total multiplicity as function of excitation energy. Generalized Fermi breakup model (GFBM). Comparison with GEMINI++ sequential decay code and Weisskopf-Ewing evaporation model. statistical multifragmentation model (SMM).
doi: 10.1103/PhysRevC.88.014607
2013WI09 Phys.Rev. C 88, 044613 (2013) J.R.Winkelbauer, S.R.Souza, M.B.Tsang Influence of secondary decay on odd-even staggering of fragment cross sections NUCLEAR REACTIONS 9Be(40Ca, X), (48Ca, X), (58Ni, X), (64Ni, X), E=140 MeV/nucleon; calculated Z distribution of fragments, Odd-even staggering (OES) behavior related to binding energies. Improved statistical multifragmentation model (ISMM) with Weisskopf-Ewing statistical emission formalism. Comparison with experimental data.
doi: 10.1103/PhysRevC.88.044613
2012CA04 Nucl.Phys. A876, 77 (2012) B.V.Carlson, R.Donangelo, S.R.Souza, W.G.Lynch, A.W.Steiner, M.B.Tsang Fermi breakup and the statistical multifragmentation model NUCLEAR REACTIONS 16O(p, X), E=62 MeV fragmentation; calculated charge, mass yields using Fermi breakup model and microcanonical statistical multifragmentation model.
doi: 10.1016/j.nuclphysa.2011.12.009
2012SO02 Phys.Rev. C 85, 024603 (2012) Finite-size effects in isobaric ratios NUCLEAR REACTIONS 9Be(40Ca, X), (48Ca, X), (58Ni, X), E not given; analyzed isobaric ratios for projectile fragmentation in the framework of modified Fisher model; deduced fit parameters for finite size effects.
doi: 10.1103/PhysRevC.85.024603
2011CA34 J.Phys.:Conf.Ser. 312, 082017 (2011) B.V.Carlson, R.Donangelo, S.R.Souza, W.G.Lynch, A.W.Steiner, M.B.Tsang Fermi breakup and the Statistical Multifragmentation Model NUCLEAR REACTIONS 16O(γ, X), E=50 MeV; calculated breakup Z=4-7 isotopes yields, σ using Fermi breakup model and statistical multifragmentation.
doi: 10.1088/1742-6596/312/4/082017
2009SO07 Phys.Rev. C 79, 054602 (2009) S.R.Souza, B.V.Carlson, R.Donangelo, W.G.Lynch, A.W.Steiner, M.B.Tsang Statistical multifragmentation model with Skyrme effective interactions NUCLEAR STRUCTURE 150Nd; calculated temperature and charge distributions for breakup of the nucleus, average multiplicity and yields of light particles Li, Be, B, C, N and O. 10Be, 20Ne, 31P, 40Ca; calculated internal free energy as a function of temperature. Statistical multifragmentation and Thomas-Fermi (SMM-TF) model with Skyrme interaction.
doi: 10.1103/PhysRevC.79.054602
2009SO15 Phys.Rev. C 80, 041602 (2009) S.R.Souza, M.B.Tsang, B.V.Carlson, R.Donangelo, W.G.Lynch, A.W.Steiner Isospin effects and the density dependence of the nuclear symmetry energy NUCLEAR REACTIONS 58Ni(40Ar, X), (40Ca, X), E not given; calculated isoscaling parameters as a function of the excitation energy of the source, and Isotopic distribution of primary fragments Li, Be, B, C, N and O using improved statistical multifragmentation model (ISMM), SLy4 and Gs Skyrme effective interactions.
doi: 10.1103/PhysRevC.80.041602
2009SO16 Phys.Rev. C 80, 044606 (2009) S.R.Souza, M.B.Tsang, B.V.Carlson, R.Donangelo, W.G.Lynch, A.W.Steiner Temperature effects in nuclear isoscaling
doi: 10.1103/PhysRevC.80.044606
2008SO13 Phys.Rev. C 78, 014605 (2008) S.R.Souza, M.B.Tsang, R.Donangelo, W.G.Lynch, A.W.Steiner Probing the symmetry energy from the nuclear isoscaling
doi: 10.1103/PhysRevC.78.014605
2007SO14 Phys.Rev. C 76, 024614 (2007) S.R.Souza, R.Donangelo, W.G.Lynch, M.B.Tsang Effects of geometric constraints on the nuclear multifragmentation process
doi: 10.1103/PhysRevC.76.024614
2006AG06 Phys.Rev. C 73, 024613 (2006) C.E.Aguiar, R.Donangelo, S.R.Souza Nuclear multifragmentation within the framework of different statistical ensembles NUCLEAR STRUCTURE 168Re; calculated thermodynamic quantities, isotopic yields from fragmentation of excited nucleus. Statistical multifragmentation model, results for three ensembles compared.
doi: 10.1103/PhysRevC.73.024613
2006LI21 Europhys.Lett. 74, 806 (2006) T.X.Liu, W.G.Lynch, M.J.van Goethem, X.D.Liu, R.Shomin, W.P.Tan, M.B.Tsang, G.Verde, A.Wagner, H.F.Xi, H.S.Xu, W.A.Friedman, S.R.Souza, R.Donangelo, L.Beaulieu, B.Davin, Y.Larochelle, T.Lefort, R.T.de Souza, R.Yanez, V.E.Viola, R.J.Charity, L.G.Sobotka Cooling dynamics in multi-fragmentation processes NUCLEAR REACTIONS 112Sn(112Sn, X), E not given; measured fragments isotopic yields, kinetic energy spectra; deduced pre-equilibrium effects.
doi: 10.1209/epl/i2006-10040-x
2004SO07 Phys.Rev. C 69, 031607 (2004) S.R.Souza, R.Donangelo, W.G.Lynch, W.P.Tan, M.B.Tsang Isoscaling bearing information on the nuclear caloric curve
doi: 10.1103/PhysRevC.69.031607
2003SO11 Phys.Rev. C 67, 051602 (2003) S.R.Souza, P.Danielewicz, S.Das Gupta, R.Donangelo, W.A.Friedman, W.G.Lynch, W.P.Tan, M.B.Tsang Mass parametrizations and predictions of isotopic observables NUCLEAR STRUCTURE A=10-270; analyzed mass parameterizations, implications for yield predictions in multifragmentation reactions.
doi: 10.1103/PhysRevC.67.051602
2003TA18 Phys.Rev. C 68, 034609 (2003) W.P.Tan, S.R.Souza, R.J.Charity, R.Donangelo, W.G.Lynch, M.B.Tsang Isospin effects in nuclear multifragmentation NUCLEAR STRUCTURE 186Re; calculated fragment charge and mass distributions from decay of excited system, isotopic yields, calometric observables; deduced isospin effects. Improved statistical multifragmentation model.
doi: 10.1103/PhysRevC.68.034609
2001DO20 Comput.Phys.Commun. 140, 405 (2001) R.Donangelo, K.Sneppen, S.R.Souza A Computer Program for Statistical Multifragmentation of Nuclei
doi: 10.1016/S0010-4655(01)00209-0
2001TS08 Phys.Rev. C64, 054615 (2001) M.B.Tsang, C.K.Gelbke, X.D.Liu, W.G.Lynch, W.P.Tan, G.Verde, H.S.Xu, W.A.Friedman, R.Donangelo, S.R.Souza, C.B.Das, S.Das Gupta, D.Zhabinsky Isoscaling in Statistical Models NUCLEAR REACTIONS 112,124Sn(112Sn, X), (124Sn, X), E*=6 MeV/nucleon; calculated fragment multiplicities, isotopic yield ratios. Statistical multifragmentation models, comparison with data.
doi: 10.1103/PhysRevC.64.054615
2000SO16 Phys.Rev. C62, 064607 (2000) S.R.Souza, W.P.Tan, R.Donangelo, C.K.Gelbke, W.G.Lynch, M.B.Tsang Nuclear Isotope Thermometry NUCLEAR STRUCTURE 112Sn; calculated isotopic yields associated with excited nucleus decay, related thermodynamic features; deduced role of secondary decay, implications for isotope thermometry.
doi: 10.1103/PhysRevC.62.064607
1998DO18 Phys.Rev. C58, R2659 (1998) Mechanisms of Intermediate Mass Fragment Formation NUCLEAR REACTIONS 197Au(Xe, X), E=60 MeV/nucleon; calculated light charged particles, intermediate mass fragments yields, multiplicity, velocity distributions; deduced fragmentation mechanism features. Molecular dynamics model.
doi: 10.1103/PhysRevC.58.R2659
1998SH04 Phys.Rev. C57, 1508 (1998) W.Q.Shen, M.B.Tsang, N.Carlin, R.J.Charity, J.Feng, C.K.Gelbke, W.C.Hsi, M.J.Huang, G.J.Kunde, M.-C.Lemaire, M.A.Lisa, W.G.Lynch, U.Lynen, Y.G.Ma, G.F.Peaslee, L.Phair, J.Pochodzalla, H.Sann, C.Schwarz, L.G.Sobotka, R.T.de Souza, S.R.Souza, W.Trautmann, C.Williams Disappearance of Rotational Flow and Reaction Plane Dispersions in Kr + Au Collisions NUCLEAR REACTIONS 197Au(84Kr, X), E=35, 55, 70, 100 MeV/nucleon; measured light charged particle σ(θ), dd(θ), tt(θ), αα(θ); deduced rotational flow energy dependence. 4π phoswich detector array.
doi: 10.1103/PhysRevC.57.1508
1997DO07 Phys.Rev. C56, 1504 (1997) Statistical Nature of Nuclear Multifragmentation NUCLEAR REACTIONS 197Au(36Ar, X), E= 110 MeV/nucleon; 197Au(Xe, X), E=60 MeV/nucleon; calculated intermediate mass fragment multiplicity vs excitation energy, other observables; deduced accuracy of statistical model vs molecular dynamics approach.
doi: 10.1103/PhysRevC.56.1504
1997DO15 Phys.Lett. 409B, 58 (1997) Charge Equilibration in Heavy-Ion Reactions at Intermediate Energies NUCLEAR REACTIONS 130Sn(130Nd, X), E=50, 100, 150 MeV/nucleon; calculated density, charge asymmetry, intermediate mass fragment multiplicity vs time, Li fragment mass distribution; deduced charge equilibration related features. Molecular dynamics models.
doi: 10.1016/S0370-2693(97)00848-4
1997TS02 Phys.Rev. C55, R557 (1997) M.B.Tsang, C.Williams, M.J.Huang, W.G.Lynch, L.Phair, D.R.Bowman, J.Dinius, C.K.Gelbke, D.O.Handzy, W.C.Hsi, G.J.Kunde, M.A.Lisa, G.F.Peaslee, A.Botvina, M.-C.Lemaire, S.R.Souza, G.Van Buren, R.J.Charity, L.G.Sobotka, C.Schwarz, U.Lynen, J.Pochodzalla, H.Sann, W.Trautmann, D.Fox, R.T.de Souza, N.Carlin Fragment Multiplicity Dependent Charge Distributions in Heavy Ion Collisions NUCLEAR REACTIONS 197Au(84Kr, X), E=35-400 MeV/nucleon; measured intermediate mass fragment element distributions dependence on the multiplicity of detected fragments.
doi: 10.1103/PhysRevC.55.R557
1997WI06 Phys.Rev. C55, R2132 (1997); Comment Phys.Rev. C59, 550 (1999) C.Williams, W.G.Lynch, C.Schwarz, M.B.Tsang, W.C.Hsi, M.J.Huang, D.R.Bowman, J.Dinius, C.K.Gelbke, D.O.Handzy, G.J.Kunde, M.A.Lisa, G.F.Peaslee, L.Phair, A.Botvina, M.-C.Lemaire, S.R.Souza, G.Van Buren, R.J.Charity, L.G.Sobotka, U.Lynen, J.Pochodzalla, H.Sann, W.Trautmann, D.Fox, R.T.de Souza, N.Carlin Fragment Distributions for Highly Charged Systems NUCLEAR REACTIONS 197Au(Kr, X), E=35, 55, 70, 100, 200, 400 MeV/nucleon; measured fragment charge distributions, mean transverse energy < E(t) >, rotational energy; deduced radial expansion velocities. Statistical model.
doi: 10.1103/PhysRevC.55.R2132
1996HU10 Phys.Rev.Lett. 77, 3739 (1996) M.J.Huang, R.C.Lemmon, F.Daffin, W.G.Lynch, C.Schwarz, M.B.Tsang, C.Williams, P.Danielewicz, K.Haglin, W.Bauer, N.Carlin, R.J.Charity, R.T.de Souza, C.K.Gelbke, W.C.Hsi, G.J.Kunde, M.-C.Lemaire, M.A.Lisa, U.Lynen, G.F.Peaslee, J.Pochodzalla, H.Sann, L.G.Sobotka, S.R.Souza, W.Trautmann Mass Dependence of Directed Collective FLow NUCLEAR REACTIONS 197Au(84Kr, X), E=200 MeV/nucleon; measured fragment collective sidewards flow per nucleon mass dependence; deduced momentum dependent nuclear mean field evidence. BUU model.
doi: 10.1103/PhysRevLett.77.3739
1995DO16 Phys.Rev. C52, 326 (1995) Radial Flow and Multifragmentation within the Framework of Molecular Dynamics Approaches NUCLEAR REACTIONS Ag, Br(O, X), (Kr, X), E=210 MeV/nucleon; Ag, Br(Ar, X), E=65 MeV/nucleon; 197Au(197Au, X), E=100 MeV/nucleon; calculated intermediate mass fragment multiplicity time evolution, fragment kinetic energy vs charge. Standard molecular dynamics approaches.
doi: 10.1103/PhysRevC.52.326
1994AG03 Phys.Rev. C49, 2253 (1994) C.E.Aguiar, V.C.Barbosa, S.R.Souza, E.C.de Oliveira Reply to ' Comment on ' Macroscopic Models for the Fusion of Very Heavy Ions' '
doi: 10.1103/PhysRevC.49.2253
1994BO32 Phys.Rev.Lett. 73, 628 (1994) J.P.Bondorf, A.S.Botvina, I.N.Mishustin, S.R.Souza Formation and Breakup of Extra-Large Composite System in Central Au + Au Collisions NUCLEAR REACTIONS 197Au(197Au, X), E=100 MeV/nucleon; analyzed multi-fragmentation data; deduced composite system formation, breakup mechanisms.
doi: 10.1103/PhysRevLett.73.628
1994PE06 Phys.Rev. C49, R2271 (1994) G.F.Peaslee, M.B.Tsang, C.Schwarz, M.J.Huang, W.S.Huang, W.C.Hsi, C.Williams, W.Bauer, D.R.Bowman, M.Chartier, J.Dinius, C.K.Gelbke, T.Glasmacher, D.O.Handzy, M.A.Lisa, W.G.Lynch, C.M.Mader, L.Phair, M.-C.Lemaire, S.R.Souza, G.Van Buren, R.J.Charity, L.G.Sobotka, G.J.Kunde, U.Lynen, J.Pochodzalla, H.Sann, W.Trautmann, D.Fox, R.T.de Souza, G.Peilert, W.A.Friedman, N.Carlin Energy Dependence of Multifragmentation in 84Kr + 197Au Collisions NUCLEAR REACTIONS 197Au(84Kr, X), E=35, 55, 70, 100, 200, 400 MeV/nucleon; measured intermediate mass fragment, total charged particle multiplicities; deduced multi-fragmentation energy dependence. QMD model.
doi: 10.1103/PhysRevC.49.R2271
1994SO05 Nucl.Phys. A571, 159 (1994) S.R.Souza, L.de Paula, S.Leray, J.Nemeth, C.Ngo, H.Ngo A Dynamical Model for Multifragmentation of Nuclei NUCLEAR REACTIONS 80Br(16O, X), E ≤ 200 MeV/nucleon; calculated fragment charge distribution, multi-fragmentation probability vs impact parameter. Molecular dynamics based schematic model.
doi: 10.1016/0375-9474(94)90346-8
1994SO08 Phys.Rev. C50, 257 (1994) S.R.Souza, F.Schussler, R.Donangelo, K.Sneppen, J.P.Bondorf, R.Elmer, B.Jakobsson, S.Leray, C.Ngo, H.Nifenecker Angular Patterns from Fragments Produced in Central Heavy-Ion Collisions NUCLEAR REACTIONS Ag, Br(16O, X), E=210 MeV/nucleon; Ag, Br(36Ar, X), E=65 MeV/nucleon; Ag, Br(84Kr, X), E=95 MeV/nucleon; analyzed fragment σ(θ), multipolarity coefficients; deduced multi-fragmenting system shape features. Molecular dynamical approach.
doi: 10.1103/PhysRevC.50.257
1993SO15 Phys.Rev. C48, R2555 (1993) Exotic Density Shapes in Asymmetric Heavy Ion Collisions at Intermediate Bombarding Energies NUCLEAR REACTIONS 197Au(Kr, X), Ag(Ar, X), E=65 MeV/nucleon; calculated nuclear density time evolution. Asymmetric systems, Boltzmann-Uehling-Unlenbeck approach.
doi: 10.1103/PhysRevC.48.R2555
1991DE16 Phys.Lett. 258B, 251 (1991) L.De Paula, J.Nemeth, B.-H.Sa, S.Leray, C.Ngo, H.Ngo, S.R.Souza, Y.-M.Zheng Stability of Excited Nuclei in a Dynamical Simulation NUCLEAR STRUCTURE 197Au; calculated stability against multifragmentation. Heat, compression, rotation type excitations, dynamical simulation.
doi: 10.1016/0370-2693(91)91079-B
1989AG01 Nucl.Phys. A491, 301 (1989) C.E.Aguiar, V.C.Barbosa, R.Donangelo, S.R.Souza Thermal Fluctuations in Heavy-Ion Fusion Reactions (I). One-dimensional models NUCLEAR REACTIONS 123,121Sb(86Kr, X), E(cm)=190-250 MeV; 124Sn(90Zr, X), (94Zr, X), E(cm)=210-250 MeV; calculated fusion σ(E).
doi: 10.1016/0375-9474(89)90705-7
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