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Neutron drip line in the deformed relativistic Hartree–Bogoliubov theory in continuum: Oxygen to Calcium
International Journal of Modern Physics E ( IF 1.1 ) Pub Date : 2021-02-18 , DOI: 10.1142/s0218301321500099
Eun Jin In 1 , Panagiota Papakonstantinou 2 , Youngman Kim 2 , Seung-Woo Hong 3
Affiliation  

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) includes all three aforementioned effects in the description of 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.

中文翻译:

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

目前仅以最轻的元素而闻名的中子滴流线的位置仍然是核物理学中的一个基本问题。它的描述是对微观核能密度泛函的挑战,因为它必须以现实的方式不仅考虑核势,而且还要考虑配对相关性、变形效应和与连续体的耦合。最近发展起来的变形相对论 Hartree-Bogoliubov 连续统理论 (DRHBc) 在整个核图中对原子核的描述中包含了所有上述三种效应。在这里,具有成功密度泛函 PC-PK1 的 DRHBc 用于研究变形是否以及如何影响对偶数核的中子滴线位置的预测8 Z 20,其中许多同位素被预测变形。将结果与基于球面相对论连续体 Hartree-Bogoliubov (RCHB) 理论的结果进行比较,并就形状演化和变分原理进行了讨论。结果发现,考虑变形效应后,Ne和Ar滴线形核是不同的。变化的方向不一定是朝向延伸的滴水线,而是取决于变形程度朝向滴水线的演变。以一致的方式处理变形效应以及配对和连续效应会严重影响中子滴线位置的理论描述。
更新日期:2021-02-18
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