Asymmetric nuclear matter equation of state.
Asymmetric nuclear matter equation of state.
复制标题
DOI：
10.1103/physrevc.44.1892
复制
发表时间：
1991-11
期刊：
影响因子：
--
通讯作者：
I. Bombaci;U. Lombardo
中科院分区：
文献类型：
--
作者：
I. Bombaci;U. Lombardo
在Brueckner-Bethe-Goldstone方法的框架下，系统地计算了密度和非对称性参数范围内的非对称核物质。在所有的非对称性参数值范围内，本文的结果都证实了每个核子的结合能满足经验抛物线定律。阐明了{sup 3}{ital S}{sub 1-}{sup 3}{ital D}{sub 1}分量在{ital NN}相互作用中的主导作用。质子和中子的单粒子势的线性变化被发现作为增加的中子过剩;偏离的现象学的潜力发生高度不对称的物质作为自洽的效果。目前的计算的不可压缩性预测一个强大的软化状态方程从对称到不对称的核物质。从β稳定性条件确定了与中子物质平衡的质子分数，并研究了它与中子星超流性的关系。
Systematic calculations of asymmetric nuclear matter have been performed in the framework of the Brueckner-Bethe-Goldstone approach in a wide range of both density and asymmetry parameter. The empirical parabolic law fulfilled by the binding energy per nucleon is confirmed by the present results in all the range of the asymmetry parameter values. The predominant role of the {sup 3}{ital S}{sub 1-}{sup 3}{ital D}{sub 1} component of the {ital NN} interaction is elucidated. A linear variation of the proton and neutron single-particle potentials is found as increasing the neutron excess; a deviation from the phenomenological potentials occurs for highly asymmetric matter as an effect of the self-consistency. The present calculations of the incompressibility predict a strong softening of the equation of state going from symmetric to asymmetric nuclear matter. The proton fraction in equilibrium with neutron matter has been determined from the beta-stability condition and its relevance to the superfluidity of neutron stars has been investigated.