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arXiv 1104.1194nucl-th
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核密度泛函理论与物态方程

Nuclear Density Functional Theory and the Equation of State

Yeunhwan Lim

摘要:

核密度泛函可以用来计算超导核物质中原子核的结合能、壳层结构和能隙。本文研究了核密度泛函理论在核天体物理中的可能应用。从能量密度泛函理论出发,我们可以推导出核子之间的相互作用,从而找到特定核的电荷半径的粗略估计。与牛顿-朗厄-托马斯费米模型相比,我们包含了三体力,这在密度是核物质密度几倍的情况下可能很重要。我们还加入了动量相关的相互作用,以考虑到核子的有效质量。我们用Wigner-Seitz盒方法研究了中子星壳中的物质。通过构造中子星的质量-半径关系和研究原中子星中的丰轻子核物质,我们发现密度泛函可以用来构造热的致密物质的状态方程。

英文摘要:

A nuclear density functional can be used to find the binding energy and shell structure of nuclei and the energy gap in superconducting nuclear matter. In this paper, we study the possible application of a nuclear density functional theory to nuclear astrophysics. From energy density functional theory, we can deduce the interaction between nucleons to find a rough estimate of the charge radius of the specific nuclei. Compared to the Finite-Range Thomas Fermi model, we include three-body forces, which might be important at densities several times that of nuclear matter density. We also add the momentum dependent interaction to take into account the effective mass of the nucleons. We study matter in the neutron star crust using the Wigner-Seitz cell method. By constructing the mass-radius relation of neutron stars and investigating lepton-rich nuclear matter in proto-neutron stars, we find that the density functional can be used to construct an equation of state of hot dense matter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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