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NSR database version of April 27, 2024.

Search: Author = S.S.Wang

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2023WA21      Phys.Rev. C 108, 014609 (2023)

S.S.Wang, Y.G.Ma, W.B.He, D.Q.Fang, X.G.Cao

Influences of α-clustering configurations on the giant dipole resonance in hot compound systems

NUCLEAR REACTIONS ¹²C(¹⁶O, γ)²⁸Si, E=125 MeV;²⁷Al(²⁰Ne, γ)⁴⁷V, E=160 MeV;¹²C(²⁰Ne, γ), E=145 MeV; calculated giant dipole resonance (GDR) spectra in hot nucleus, effects of projectile polarization on the GDR spectra. Investigated the sensitivity of GDR lineshape to the α-clustering configurations of projectile, including the linear chain, kite, square, and tetrahedron configurations. Calculations in the framework of an extended quantum molecular dynamics (EQMD) model. Comparison to experimental data.

doi: 10.1103/PhysRevC.108.014609
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2022WA09      Phys.Rev. C 105, 034616 (2022)

S.S.Wang, Y.G.Ma, D.Q.Fang, X.G.Cao

Effects of neutron-skin thickness on direct hard photon emission from reactions induced by the neutron-rich projectile ⁵⁰Ca

NUCLEAR REACTIONS ¹²C, ⁴⁰Ca(⁵⁰Ca, γX), E=40-150 MeV/nucleon; calculated yield of direct hard photons from central and peripheral collisions, multiplicity of direct hard photons. Studied the effects of neutron skin thickness on direct hard photon emissions. Isospin-dependent quantum molecular dynamics model (IDQMD).

doi: 10.1103/PhysRevC.105.034616
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2020DE30      Phys.Rev. C 102, 031301 (2020)

B.Dey, S.-S.Wang, D.Pandit, S.Bhattacharya, X.-G.Cao, W.-B.He, Y.-G.Ma, N.Quang Hung, N.Dinh Dang

Exotic nuclear shape due to cluster formation at high angular momentum

NUCLEAR REACTIONS ¹²C(¹⁶O, X)²⁸Si^*,12C(²⁰Ne, X)³²S^*, E not given; calculated density distributions using extended quantum molecular dynamics (EQMD) model, considering ¹²C as a triangle, ¹⁶O as a square, and ²⁰Ne as a pentagonal. ²⁸Si, ³²S; calculated neutron and proton pairing gaps as functions of temperature and angular momenta within the finite-temperature BCS (FTBCS) theory; analyzed experimental data for giant dipole resonance (GDR) strength functions for Eγ=5 to 30 MeV, and compared with EQMD calculations, and with TSFM calculations with and without shell corrections. Discussed effects of cluster shapes of ³²S and ²⁸Si in the GDR strength function at high angular momentum and temperature.

doi: 10.1103/PhysRevC.102.031301
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2020WA25      Phys.Rev. C 102, 024620 (2020)

S.S.Wang, Y.G.Ma, X.G.Cao, D.Q.Fang, C.W.Ma

Hard-photon production and its correlation with intermediate-mass fragments in a framework of a quantum molecular dynamics model

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, X), E=60 MeV/nucleon; calculated differential σ from inclusive events with and without Pauli blocking for hard photons, separation time between direct photons and thermal photons as a function of impact parameter, production probabilities of photons and IMFs and multiplicity correlation as function of time, hard-photon (Eγ=20-130 MeV) energy spectra, temperatures as a function of incident energy. ⁴⁰Ca(⁴⁰Ca, X), E=40-120 MeV/nucleon; calculated multiplicities of direct and thermal photons, multiplicity of intermediate-mass fragments (IMFs), and multiplicity correlations between the direct photons or thermal photons and the IMFs as function of incident energy and centrality. ¹²C(¹⁴N, X), E=20, 30, 40 MeV/nucleon; calculated high-energy photon spectra and compared with experimental data. Isospin-dependent quantum molecular dynamics (IQMD) model by embedding incoherent neutron-proton bremsstrahlung photon production channel to investigate high-energy photon production and correlation with fragments.

doi: 10.1103/PhysRevC.102.024620
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2020WA30      Eur.Phys.J. A 56, 254 (2020)

S.S.Wang, Y.G.Ma, X.G.Cao, D.Q.Fang, C.W.Ma

Azimuthal anisotropy and multiplicities of hard photons and free nucleons in intermediate-energy heavy-ion collisions

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, X), E=60 MeV/nucleon; analyzed available data; calculated average density, hard photon production probability, directed flows, scale-invariant momentum vs scale-invariant rapidity using a framework of isospin-dependent quantum molecular dynamics (IQMD) model.

doi: 10.1140/epja/s10050-020-00264-z
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2017WA15      Phys.Rev. C 95, 054615 (2017)

S.S.Wang, Y.G.Ma, X.G.Cao, W.B.He, H.Y.Kong, C.W.Ma

Investigation of giant dipole resonances in heavy deformed nuclei with an extended quantum molecular dynamics model

NUCLEAR STRUCTURE ^{130,132,134,142,144,146,148,150}Nd, ^{134,136,138,144,148,150,152,154}Sm; calculated β₂, energies, dipole strengths, spectra of giant dipole resonances (GDR), dependence of GDR spectra on symmetry energy coefficient for ¹⁵⁰Nd. Deformation evolution of giant dipole resonance. Extended quantum molecular dynamics model. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.054615
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2016MA15      J.Phys.(London) G43, 045102 (2016)

C.-W.Ma, Y.-D.Song, C.-Y.Qiao, S.-S.Wang, H.-L.Wei, Y.-G.Ma, X.-G.Cao

A scaling phenomenon in the difference of Shannon information uncertainty of fragments in heavy-ion collisions

NUCLEAR REACTIONS ⁹Be(⁴⁰Ca, X), (⁴⁸Ca, X), (⁵⁸Ni, X), (⁶⁴Ni, X), E=140 MeV/nucleon; analyzed available data using Shannon's information-entropy uncertainty; calculated scaling phenomenon in the manner of canonical ensemble theory. Antisymmetric molecular dynamics (AMD) and AMD + GEMINI models.

doi: 10.1088/0954-3899/43/4/045102
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2015MA04      Phys.Rev. C 91, 014615 (2015)

C.-W.Ma, Y.-L.Zhang, C.-Y.Qiao, S.-S.Wang

Target effects in isobaric yield ratio differences between projectile fragmentation reactions

NUCLEAR REACTIONS ⁹Be, ¹⁸¹Ta(⁴⁰Ca, X), (⁴⁸Ca, X), (⁵⁸Ni, X), (⁶⁴Ni, X), E=140 MeV/nucleon; analyzed experimental data to investigate target effects on the isobaric yield ratios (IYR) and isobaric yield ratio differences (IBD) in different reactions. Proposed as a probe to study the difference between the neutron and proton densities of the reaction systems.

doi: 10.1103/PhysRevC.91.014615
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2015MA40      Chin.Phys.Lett. 32, 072501 (2015)

C.-W.Ma, Y.-L.Zhang, S.-S.Wang, C.-Y.Qiao

A Model Comparison Study of Fragment Production in 140 A MeV ^{58, 64}Ni+⁹Be Reactions

NUCLEAR REACTIONS ⁹Be(⁵⁸Ni, X), (⁶⁴Ni, X), E=140 MeV/nucleon; calculated σ for fragments production using the AMD and AMD+GEMINI models. Comparison with available data.

doi: 10.1088/0256-307X/32/7/072501
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2015QI06      Phys.Rev. C 92, 014612 (2015)

C.Y.Qiao, H.L.Wei, C.W.Ma, Y.L.Zhang, S.S.Wang

Isobaric yield ratio difference between the 140 A MeV ⁵⁸Ni + ⁹Be and ⁶⁴Ni + ⁹Be reactions studied by the antisymmetric molecular dynamics model

NUCLEAR REACTIONS ^58,64Ni(⁹Be, X), E=140 MeV/nucleon; calculated cross-sectional distributions of fragments, and isobaric yield ratios (IYRs) for large-A, N-Z=0-3 fragments. Isobaric yield ratio difference (IBD) method. Antisymmetric molecular dynamics (AMD) model plus the sequential decay model GEMINI. Comparison with experimental data, and with other theoretical calculations.

doi: 10.1103/PhysRevC.92.014612
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2014MA31      Phys.Rev. C 89, 057602 (2014)

C.W.Ma, J.Yu, X.M.Bai, Y.L.Zhang, H.L.Wei, S.S.Wang

Isobaric yield ratio difference and neutron density difference in calcium isotopes

NUCLEAR REACTIONS ⁴⁰Ca(³⁸Ca, X), (⁴²Ca, X), (⁴⁴Ca, X), (⁴⁶Ca, X), (⁴⁸Ca, X), (⁵⁰Ca, X), (⁵²Ca, X), E=80 MeV/nucleon; ⁹Be(⁴⁰Ca, X), (⁴⁸Ca, X), E=140 MeV/nucleon; calculated isobaric yield ratio difference, ratio of chemical potential difference between neutrons and protons to temperature (IB-(Δμ21/T)) for prefragments and final fragments. Modified statistical abrasion-ablation (SAA) model, assuming Fermi type neutron density distribution. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.057602
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2013MA07      Chin.Phys.C 37, 024102 (2013)

C.-W.Ma, H.-L.Song, J.Pu, T.-L.Zhang, S.Zhang, S.-S.Wang

Symmetry energy from neutron-rich fragments in heavy-ion collisions, and its dependence on incident energy, and impact parameters

NUCLEAR REACTIONS ¹²C(⁶⁰Ni, X), E=80, 140 MeV/nucleon; calculated fragments yield, σ, isobaric yield ratios. Comparison with available data.

doi: 10.1088/1674-1137/37/2/024102
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2013MA24      Phys.Rev. C 87, 034618 (2013)

C.-W.Ma, S.-S.Wang, Y.-L.Zhang, H.-L.Wei

Isobaric yield ratio difference in heavy-ion collisions, and comparison to isoscaling

NUCLEAR REACTIONS ⁹Be(⁴⁰Ca, X), (⁴⁸Ca, X), (⁵⁸Ni, X), (⁶⁴Ni, X), E=140 MeV/nucleon; analyzed isotopic (Z=6-19) and isotonic (N=8-21) yield ratio, IB-Δμ/Temp and IS-Δμ/Temp distributions. Isobaric yield ratio difference (IBD) method in heavy-ion collisions.

doi: 10.1103/PhysRevC.87.034618
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2013MA56      Phys.Rev. C 88, 014609 (2013)

C.-W.Ma, X.-L.Zhao, J.Pu, S.-S.Wang, C.-Y.Qiao, X.Feng, R.Wada, Y.-G.Ma

Temperature determined by isobaric yield ratios in a grand-canonical ensemble theory

doi: 10.1103/PhysRevC.88.014609
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2013MA79      J.Phys.(London) G40, 125106 (2013)

C.-W.Ma, S.-S.Wang, Y.-L.Zhang, H.-L.Wei

Chemical properties of colliding sources in ^{124, 136}Xe and ^{112, 124}Sn induced collisions in isobaric yield ratio difference and isoscaling method

NUCLEAR REACTIONS ¹²⁴Sn(¹²⁴Sn, X), ¹¹²Sn(¹¹²Sn, X), Pb(¹²⁴Xe, X), (¹³⁶Xe, X), E=1 GeV/nucleon; calculated isocaling phenomena and parameters between fragments, isoscaling and isobaric yield ratio difference. Comparison with available data.

doi: 10.1088/0954-3899/40/12/125106
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2012MA17      Chin.Phys.Lett. 29, 062101 (2012)

C.-W.Ma, J.Pu, S.-S.Wang, H.-L.Wei

The Symmetry Energy from the Neutron-Rich Nucleus Produced in the Intermediate-Energy ^{40, 48}Ca and ^{58, 64}Ni Projectile Fragmentation

NUCLEAR REACTIONS ⁹Be(⁴⁰Ca, X), (⁴⁸Ca, X), (⁵⁸Ni, X), (⁶⁴Ni, X), E=140 MeV/nucleon; calculated isobaric yield ratios, production of neutron-rich isobars. Modified Fisher model.

doi: 10.1088/0256-307X/29/6/062101
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2012MA28      Eur.Phys.J. A 48, 78 (2012)

C.-W.Ma, J.Pu, H.-L.Wei, S.-S.Wang, H.-Li.Song, S.Zhang, L.Chen

Symmetry energy extracted from fragments in relativistic energy heavy-ion collisions induced by ^{124, 136}Xe

NUCLEAR REACTIONS Pb(¹²⁴Xe, X), E=1 GeV/nucleon;H, Pb(¹³⁶Xe, X), E=1 GeV/nucleon; calculated, analyzed fragment yields; deduced symmetry energy coefficient vs mass for different isospin.

doi: 10.1140/epja/i2012-12078-5
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2012MA38      Chin.Phys.Lett. 29, 092101 (2012)

C.-W.Ma, J.-B.Yang, M.Yu, J.Pu, S.-S.Wang, H.-L.Wei

Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus

doi: 10.1088/0256-307X/29/9/092101
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2012MA52      Phys.Rev. C 86, 054611 (2012)

C.W.Ma, J.Pu, Y.G.Ma, R.Wada, S.S.Wang

Temperature determined by isobaric yield ratios in heavy-ion collisions

NUCLEAR REACTIONS ⁹Be(⁶⁴Ni, X), E=140 MeV/nucleon; ²⁰⁸Pb(¹³⁶Xe, X), E=1 GeV/nucleon; analyzed σ, temperature (T) of fragments, and ratio of difference between the chemical potential of neutron and proton and temperature in heavy ion collisions using isobaric yield ratio (IYR) method. Modified statistical abrasion-ablation (SAA) model.

doi: 10.1103/PhysRevC.86.054611
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2011MA61      Chin.Phys.C 35, 1017 (2011)

C.-W.Ma, S.S.Wang

Isospin dependence of projectile fragmentation and neutron-skin thickness of neutron-rich nuclei

NUCLEAR REACTIONS ⁹Be(⁴⁰Ca, X), (⁴⁸Ca, X), E=140 MeV/nucleon; Pb(¹²⁴Xe, X), (¹³⁶Xe, X), E=1 GeV/nucleon; measured reaction products; deduced fragments σ. Comparison with statistical abrasion-ablation model calculations.

doi: 10.1088/1674-1137/35/11/007
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1999WA06      Chin.Phys.Lett. 16, 91 (1999)

S.-S.Wang, R.Liu, Z.-M.Wang

Analysis of Multiplicity Fluctuations in pp Collisions at 400 GeV/c

NUCLEAR REACTIONS ¹H(p, X), E at 400 GeV/c; analyzed charged particle multiplicity, angular distributions; deduced bunching parameters, multifractal structure.

doi: 10.1088/0256-307X/16/2/005
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1996WA20      Chin.Phys.Lett. 13, 253 (1996)

S.-S.Wang, Z.-H.Li

Cumulant Correlators and Azimuthal Corrections in PP Collisions at 400 GeV/c

NUCLEAR REACTIONS ¹H(p, X), E at 400 GeV/c; analyzed particle cumulant, correlators, azimuthal correlations.

doi: 10.1088/0256-307X/13/4/004
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1987PA07      Phys.Rev. C35, 1119 (1987)

S.A.Page, H.C.Evans, G.T.Ewan, S.-P.Kwan, J.R.Leslie, J.D.MacArthur, W.McLatchie, P.Skensved, S.-S.Wang, H.-B.Mak, A.B.McDonald, C.A.Barnes, T.K.Alexander, E.T.H.Clifford

Weak Pion-Nucleon Coupling Strength: New constraint from parity mixing in ¹⁸F

NUCLEAR REACTIONS ¹⁶O(³He, p), E=4.05 MeV; measured γ CP; deduced weak pion-nucleon coupling strength. ¹⁹F levels deduced parity mixing.

doi: 10.1103/PhysRevC.35.1119
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1985EV03      Phys.Rev.Lett. 55, 791 (1985)

H.C.Evans, G.T.Ewan, S.-P.Kwan, J.R.Leslie, J.D.MacArthur, H.-B.Mak, W.McLatchie, S.A.Page, P.Skensved, S.-S.Wang, A.B.McDonald, C.A.Barnes, T.K.Alexander, E.T.H.Clifford

Parity Mixing of 0⁺ and 0^- Levels in ¹⁸F

NUCLEAR REACTIONS ¹⁶O(³He, p), E=4.05 MeV; measured Eγ, Iγ, γ CP; deduced weak pion-nucleon coupling constant. ¹⁸F transition deduced parity nonconserving matrix element.

doi: 10.1103/PhysRevLett.55.791
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1985MA32      Phys.Rev. C32, 314 (1985)

J.D.MacArthur, S.-P.Kwan, H.-B.Mak, W.McLatchie, S.A.Page, S.-S.Wang, T.K.Alexander

Experimental Evidence Against the Proposed Band Based on a Shape Isomer in ³²S

NUCLEAR REACTIONS ²⁸Si(α, γ), E=1.76-3.82 MeV; σ(Eγ, E), γ yield, γ(θ). ³²S level deduced J, π, B(λ).

doi: 10.1103/PhysRevC.32.314
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