原子核对称能对中子星壳层结构的影响

发布时间：2018-05-28 13:15

本文选题：原子核对称能 + 中子星　；参考：《原子核物理评论》2017年03期

【摘要】：中子星内壳层中存在原子核、中子、电子等非均匀分布的物质。在Wigner-Seitz近似下,共存相方法和自洽Thomas-Fermi近似方法是描述这种非均匀物质的有效方法。中子在非均匀物质所占的比例远远大于其他组分,因此原子核的对称能对非均匀物质的性质会产生十分重要的影响,而原子核对称能的密度依赖关系在核物质饱和密度附近有较大的不确定性。采用相对论平均场理论描述核子间相互作用,研究原子核对称能对中子星内壳层的密度范围、pasta相结构、壳核相变密度等性质的影响,探寻其中可能存在的关联。计算结果表明,原子核对称能及其密度依赖性在决定中子星内壳层非均匀物质的性质中起着重要作用,这与之前相关研究中得到的结论基本相符。
[Abstract]:In the inner shell of a neutron star, there are inhomogeneous distributions of nuclei, neutrons, electrons, and so on. In the Wigner-Seitz approximation, the coexisting phase method and the self-consistent Thomas-Fermi approximation method are effective methods to describe this heterogeneous material. The proportion of neutrons in non-uniform matter is much larger than that of other components, so the symmetry energy of the nucleus has a very important effect on the properties of non-homogeneous matter. The density dependence of nuclear symmetry energy is uncertain near the saturation density of nuclear matter. In this paper, the relativistic mean field theory is used to describe the internucleon interaction. The effects of nuclear symmetry energy on the density range of the inner shell of a neutron star, such as the phase structure of the shell and the density of the phase transition of the shell, are studied. The calculated results show that the nuclear symmetry energy and its density dependence play an important role in determining the properties of nonhomogeneous matter in the inner shell of neutron stars, which is basically consistent with the conclusions obtained in previous studies.
【作者单位】：南开大学物理科学学院;
【基金】：国家自然科学基金资助项目(11375089,11405090,11675083)~~
【分类号】：O571;P145.6

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