连续体中变形相对论Hartree-Bogoliubov理论中的中子滴线:氧到钙

E. J. In, Youngman Kim, P. Papakonstantinou, Seung-Woo Hong
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引用次数: 3

摘要

中子滴线的位置,目前只知道最轻的元素,仍然是核物理学的一个基本问题。它的描述是微观核能密度函数的一个挑战,因为它必须以一种现实的方式考虑不仅核势,而且配对相关性,变形效应和耦合到连续体。最近发展的变形相对论Hartree-Bogoliubov连续介质理论(DRHBc)旨在提供整个核图中偶偶核的统一描述。本文利用具有成功密度泛函数PC-PK1的DRHBc来研究变形是否以及如何影响8<=Z<=20的偶偶核的中子滴线位置预测,其中许多同位素被预测为变形。将结果与基于球面相对论连续体Hartree-Bogoliubov (RCHB)理论的结果进行了比较,并从形状演化和变分原理的角度进行了讨论。考虑变形效应后,Ne和Ar的滴线核是不同的。变化的方向不一定是朝着延伸的滴水线,而是取决于向滴水线变形程度的演变。变形效应以及配对效应和连续效应的一致性处理对中子滴线位置的理论描述具有重要的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Neutron drip line in the deformed relativistic Hartree–Bogoliubov theory in continuum: Oxygen to Calcium
The location of the neutron drip line, currently known for only the lightest elements, remains a fundamental question in nuclear physics. Its description is a challenge for microscopic nuclear energy density functionals, as it must take into account in a realistic way not only the nuclear potential, but also pairing correlations, deformation effects and coupling to the continuum. The recently developed deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) aims to provide a unified description of even-even nuclei throughout the nuclear chart. Here, the DRHBc with the successful density functional PC-PK1 is used to investigate whether and how deformation influences the prediction for the neutron drip-line location for even-even nuclei with 8<=Z<=20, where many isotopes are predicted deformed. The results are compared with those based on the spherical relativistic continuum Hartree-Bogoliubov (RCHB) theory and discussed in terms of shape evolution and the variational principle. It is found that the Ne and Ar drip-line nuclei are different after the deformation effect is included. The direction of the change is not necessarily towards an extended drip line, but rather depends on the evolution of the degree of deformation towards the drip line. Deformation effects as well as pairing and continuum effects treated in a consistent way can affect critically the theoretical description of the neutron drip-line location.
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