dorsal/arxiv
View SchemaProbing the symmetry energy and the degree of isospin equilibrium
| Authors | Qingfeng Li, Zhuxia Li, Horst Stoecker |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0603050 |
| URL | https://arxiv.org/abs/nucl-th/0603050 |
| DOI | 10.1103/PhysRevC.73.051601 |
| Journal | Phys.Rev.C73:051601,2006 |
Abstract
The rapidity dependence of the single- and double- neutron to proton ratios of nucleon emission from isospin-asymmetric but mass-symmetric reactions Zr+Ru and Ru+Zr at energy range $100 \sim 800$ A MeV and impact parameter range $0\sim 8$ fm is investigated. The reaction system with isospin-asymmetry and mass-symmetry has the advantage of simultaneously showing up the dependence on the symmetry energy and the degree of the isospin equilibrium. We find that the beam energy- and the impact parameter dependence of the slope parameter of the double neutron to proton ratio ($F_D$) as function of rapidity are quite sensitive to the density dependence of symmetry energy, especially at energies $E_b\sim 400$ A MeV and reduced impact parameters around 0.5. Here the symmetry energy effect on the $F_D$ is enhanced, as compared to the single neutron to proton ratio. The degree of the equilibrium with respect to isospin (isospin mixing) in terms of the $F_D$ is addressed and its dependence on the symmetry energy is also discussed.
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"abstract": "The rapidity dependence of the single- and double- neutron to proton ratios\nof nucleon emission from isospin-asymmetric but mass-symmetric reactions Zr+Ru\nand Ru+Zr at energy range $100 \\sim 800$ A MeV and impact parameter range\n$0\\sim 8$ fm is investigated. The reaction system with isospin-asymmetry and\nmass-symmetry has the advantage of simultaneously showing up the dependence on\nthe symmetry energy and the degree of the isospin equilibrium. We find that the\nbeam energy- and the impact parameter dependence of the slope parameter of the\ndouble neutron to proton ratio ($F_D$) as function of rapidity are quite\nsensitive to the density dependence of symmetry energy, especially at energies\n$E_b\\sim 400$ A MeV and reduced impact parameters around 0.5. Here the symmetry\nenergy effect on the $F_D$ is enhanced, as compared to the single neutron to\nproton ratio. The degree of the equilibrium with respect to isospin (isospin\nmixing) in terms of the $F_D$ is addressed and its dependence on the symmetry\nenergy is also discussed.",
"arxiv_id": "nucl-th/0603050",
"authors": [
"Qingfeng Li",
"Zhuxia Li",
"Horst Stoecker"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.73.051601",
"journal_ref": "Phys.Rev.C73:051601,2006",
"title": "Probing the symmetry energy and the degree of isospin equilibrium",
"url": "https://arxiv.org/abs/nucl-th/0603050"
},
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