Density dependence of the nuclear symmetry energy constrained by mean-field calculations

被引：56

作者：

Dong, Jianmin ^{[1
,2
,3
,4
,5
,6
,7
,8
]}

Zuo, Wei ^{[1
,2
,3
,4
,5
,6
]}

Gu, Jianzhong ^{[7
]}

Lombardo, Umberto ^{[5
,6
]}

机构：

[1] Lanzhou Univ, Res Ctr Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[3] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[4] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[5] Dipartimento Fis, I-95123 Catania, Italy

[6] INFN LNS, I-95123 Catania, Italy

[7] China Inst Atom Energy, Beijing 102413, Peoples R China

[8] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

PHYSICAL REVIEW C | 2012年 / 85卷 / 03期

基金：

中国国家自然科学基金;

关键词：

ISOSPIN ASYMMETRY; NEUTRON RADII; EQUATION; PHYSICS; STATE;

D O I：

10.1103/PhysRevC.85.034308

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We establish a correlation for the symmetry energy at saturation density S-0, slope parameter L, and curvature parameter K-sym based on widely different mean-field interactions. With the help of this correlation and available empirical and theoretical information, the density-dependent behavior around the saturation density is determined. We compare the results obtained with the present approach with those by other analyses. With this obtained density-dependent behavior of the symmetry energy, the neutron skin thickness of Pb-208 and some properties of neutron stars are investigated. In addition, it is found that the expression S(rho) = S-0(rho/rho(0))(gamma) or S(rho) = 12.5 (rho/rho(0))(2/3) + C-p(rho/rho(0))(gamma) does not reproduce the density dependence of the symmetry energy as predicted by the mean-field approach around nuclear saturation density.

引用

页数：6

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