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Nucleus-nucleus interactions in the inner crust of neutron stars

机译:中子恒星内壳体中的核 - 核相互作用

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The interaction between nuclei in the inner crust of neutron stars consists of two contributions: the so-called "direct" interaction and an "induced" one due to density changes in the neutron fluid. For large nuclear separations r the contributions from nuclear forces to each of these terms are shown to be nonzero. In the static limit they are equal in magnitude but have opposite signs and they cancel exactly. We analyze earlier results on effective interactions in light of this finding. We consider the properties of long-wavelength collective modes and, in particular, calculate the degree of mixing between the lattice phonons and the phonons in the neutron superfluid. Using microscopic theory, we calculate the net non-Coulombic contribution to the nucleus-nucleus interaction and show that, for large r, the leading term is due to exchange of two phonons and varies as 1/r(7); it is an analog of the Casimir-Polder interaction between neutral atoms.
机译:中子恒星内地壳中核之间的相互作用由两种贡献组成:由于中子液中的密度变化,所谓的“直接”相互作用和“诱导”的相互作用。 对于大型核分离,R核动力对这些术语中的每一个的贡献被认为是非零。 在静态限制中,它们的幅度相等,但具有相反的标志,它们完全取消。 我们分析了早期的结果,鉴于这种发现,有效的互动。 我们考虑长波长集体模式的性质,特别是计算晶格声子和中子超流体中的声子之间的混合程度。 使用微观理论,我们计算核 - 核相互作用的净非库仑贡献,表明,对于大型r,前期术语是由于两个声子的交换,并且变化为1 / R(7); 它是中性原子之间的Casimir-Bolder相互作用的模拟。

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