Shell-model-like approach based on covariant density functional theory in 3D lattice space: Evolution of octupole shape in rotating 224Th

被引：7

作者：

Xu, Fangfang ^{[1
]}

Wang, Yiping ^{[1
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2023年 / 32卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Covariant density functional theory; shell-model-like approach; octupole shape; high spin; HARTREE-BOGOLIUBOV THEORY; NEUTRON-RICH; HIGH SPINS; NUCLEI; BANDS; ACTINIDES; FREEDOM; STATES; TH; RA;

D O I：

10.1142/S0218301323400074

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：

The evolution of the octupole shape with rotation in pear-shaped nuclei is a topic of broad interest. Based on the cranking covariant density functional theory in 3D lattice space, a shell-model-like approach is implemented to take into account the pairing correlations, and applied for the interleaved positive- and negative-parity bands in Th-224. The experimental I-omega relations are well reproduced. It is found that the octupole deformation of yrast states in Th-224 rises slightly and then declines with increasing spin. After the band crossing, the octupole deformation suddenly disappears, i.e., a sharp transition from an octupole shape to a nearly spherical shape takes place at high spins. This is explained by the evolution of the coupling strength between the proton i(13/2) and f(7/2) orbitals with spin.

引用

页数：12

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