dorsal/arxiv
View SchemaNuclear symmetry potential in the relativistic impulse approximation
| Authors | Zeng-Hua Li, Lie-Wen Chen, Che Ming Ko, Bao-An Li, Hong-Ru Ma |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0606063 |
| URL | https://arxiv.org/abs/nucl-th/0606063 |
| DOI | 10.1103/PhysRevC.74.044613 |
| Journal | Phys.Rev. C74 (2006) 044613 |
Abstract
Using the relativistic impulse approximation with the Love-Franey \textsl{NN} scattering amplitude developed by Murdock and Horowitz, we investigate the low-energy (100 MeV$\leq E_{\mathrm{kin}}\leq 400$ MeV) behavior of the nucleon Dirac optical potential, the Schr\"{o}dinger-equivalent potential, and the nuclear symmetry potential in isospin asymmetric nuclear matter. We find that the nuclear symmetry potential at fixed baryon density decreases with increasing nucleon energy. In particular, the nuclear symmetry potential at saturation density changes from positive to negative values at nucleon kinetic energy of about 200 MeV. Furthermore,the obtained energy and density dependence of the nuclear symmetry potential is consistent with those of the isospin- and momentum-dependent MDI interaction with $x=0$, which has been found to describe reasonably both the isospin diffusion data from heavy-ion collisions and the empirical neutron-skin thickness of $^{208} $Pb.
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"abstract": "Using the relativistic impulse approximation with the Love-Franey \\textsl{NN}\nscattering amplitude developed by Murdock and Horowitz, we investigate the\nlow-energy (100 MeV$\\leq E_{\\mathrm{kin}}\\leq 400$ MeV) behavior of the nucleon\nDirac optical potential, the Schr\\\"{o}dinger-equivalent potential, and the\nnuclear symmetry potential in isospin asymmetric nuclear matter. We find that\nthe nuclear symmetry potential at fixed baryon density decreases with\nincreasing nucleon energy. In particular, the nuclear symmetry potential at\nsaturation density changes from positive to negative values at nucleon kinetic\nenergy of about 200 MeV. Furthermore,the obtained energy and density dependence\nof the nuclear symmetry potential is consistent with those of the isospin- and\nmomentum-dependent MDI interaction with $x=0$, which has been found to describe\nreasonably both the isospin diffusion data from heavy-ion collisions and the\nempirical neutron-skin thickness of $^{208} $Pb.",
"arxiv_id": "nucl-th/0606063",
"authors": [
"Zeng-Hua Li",
"Lie-Wen Chen",
"Che Ming Ko",
"Bao-An Li",
"Hong-Ru Ma"
],
"categories": [
"nucl-th",
"astro-ph",
"nucl-ex"
],
"doi": "10.1103/PhysRevC.74.044613",
"journal_ref": "Phys.Rev. C74 (2006) 044613",
"title": "Nuclear symmetry potential in the relativistic impulse approximation",
"url": "https://arxiv.org/abs/nucl-th/0606063"
},
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