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arXiv 0709.3188nucl-thastro-phhep-ph
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致密核物质中的自旋极化现象

Spin polarization phenomena in dense nuclear matter

A. A. Isayev

摘要:

在较宽的同位旋不对称性和密度范围内,研究了具有有效核子-核子相互作用的核物质的自旋极化态。基于Fermi液体理论,本文指出了自旋有序相变的几种可能情形:(a)在某一临界密度下,核物质经历一个相变,转变为质子和中子自旋方向相反的自旋极化态(Skyrme SLy 4和Gogny D1 S相互作用);(b)在某一临界密度下,出现了中子和质子自旋方向相同的自旋极化态(Skyrme SkI 5相互作用);(c)密度增加的核物质,首先经历相变到中子和质子自旋方向相反的状态,它以更大的密度过渡到具有相同核子自旋方向的状态(Skyrme SkI 3相互作用)。

英文摘要:

Spin polarized states in nuclear matter with an effective nucleon-nucleon interaction are studied for a wide range of isospin asymmetries and densities. Based on a Fermi liquid theory, it is shown that there are a few possible scenarios of spin ordered phase transitions: (a) nuclear matter undergoes at some critical density a phase transition to a spin polarized state with the oppositely directed spins of neutrons and protons (Skyrme SLy4 and Gogny D1S interactions); (b) at some critical density, a spin polarized state with the like-directed neutron and proton spins appears (Skyrme SkI5 interaction); (c) nuclear matter under increasing density, at first, undergoes a phase transition to the state with the opposite directions of neutron and proton spins, which goes over at larger density to the state with the same direction of nucleon spins (Skyrme SkI3 interaction).

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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