dorsal/arxiv
View SchemaIsospin non-equilibrium in heavy-ion collisions at intermediate energies
| Authors | Bao-An Li, Sherry J. Yennello |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9505015 |
| URL | https://arxiv.org/abs/nucl-th/9505015 |
| DOI | 10.1103/PhysRevC.52.R1746 |
| Journal | Phys.Rev.C52:1746-1749,1995 |
Abstract
We study the equilibration of isospin degree of freedom in intermediate energy heavy-ion collisions using an isospin-dependent BUU model. It is found that there exists a transition from the isospin equilibration at low energies to non-equilibration at high energies as the beam energy varies across the Fermi energy in central, asymmetric heavy-ion collisions. At beam energies around 55 MeV/nucleon, the composite system in thermal equilibrium but isospin non-equilibrium breaks up into two primary hot residues with N/Z ratios closely related to those of the target and projectile respectively. The decay of these forward-backward moving residues results in the strong isospin asymmetry in space and the dependence of the isotopic composition of fragments on the N/Z ratios of the target and projectile. These features are in good agreement with those found recently in experiments at NSCL/MSU and TAMU, implications of these findings are discussed.
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"abstract": "We study the equilibration of isospin degree of freedom in intermediate\nenergy heavy-ion collisions using an isospin-dependent BUU model. It is found\nthat there exists a transition from the isospin equilibration at low energies\nto non-equilibration at high energies as the beam energy varies across the\nFermi energy in central, asymmetric heavy-ion collisions. At beam energies\naround 55 MeV/nucleon, the composite system in thermal equilibrium but isospin\nnon-equilibrium breaks up into two primary hot residues with N/Z ratios closely\nrelated to those of the target and projectile respectively. The decay of these\nforward-backward moving residues results in the strong isospin asymmetry in\nspace and the dependence of the isotopic composition of fragments on the N/Z\nratios of the target and projectile. These features are in good agreement with\nthose found recently in experiments at NSCL/MSU and TAMU, implications of these\nfindings are discussed.",
"arxiv_id": "nucl-th/9505015",
"authors": [
"Bao-An Li",
"Sherry J. Yennello"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.52.R1746",
"journal_ref": "Phys.Rev.C52:1746-1749,1995",
"title": "Isospin non-equilibrium in heavy-ion collisions at intermediate energies",
"url": "https://arxiv.org/abs/nucl-th/9505015"
},
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