Deformed two-neutron halo in 19B

被引：49

作者：

Sun, Xiang-Xiang ^{[1
]}

机构：

[1] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China

来源：

PHYSICAL REVIEW C | 2021年 / 103卷 / 05期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

HARTREE-BOGOLIUBOV DESCRIPTION; GROUND-STATE PROPERTIES; VALENCE NEUTRONS; NUCLEAR RADII; FIELD; DENSITY; N=16;

D O I：

10.1103/PhysRevC.103.054315

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Ground state properties of B-19 are studied by using the deformed relativistic Hartree-Bogoliubov theory in continuum. The calculations with the density functional PK1 show that B-19 is a deformed two-neutron (2n) halo nucleus. By examining the evolution of single neutron levels, it is found that the valence levels, which are weakly bound or embedded in the continuum due to pairing, contain considerable s-wave components with the probability amplitude of 0.359 and lead to the formation of the halo. Strong quadrupole correlations mix sd orbitals and drive B-19 to be prolate. The calculated density of the neutron core presents a prolate shape while the neutron halo is oblate, meaning B-19 is a 2n halo candidate with shape decoupling effects.

引用

页数：9

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