Tensor Force Effect on Shape Coexistence of N = 28 Neutron-Rich Isotones

The tensor force effect on potential energy surfaces of the N = 28 neutron-rich isotones is investigated by using the deformed Skyrme Hartree-Fock-Bogoliubov approach with the T22 interaction. It is found that, without the tensor force, ^40Mg and ^46At have prolate and spherical ground states, respe...

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Published inChinese physics letters Vol. 31; no. 10; pp. 34 - 36
Main Author 王艳召 顾建中 于国梁 侯召宇
Format Journal Article
LanguageEnglish
Published 01.10.2014
Subjects
T22
丰中子
势能面
基态
张力器
张量
形状共存
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Summary:The tensor force effect on potential energy surfaces of the N = 28 neutron-rich isotones is investigated by using the deformed Skyrme Hartree-Fock-Bogoliubov approach with the T22 interaction. It is found that, without the tensor force, ^40Mg and ^46At have prolate and spherical ground states, respectively. The ground states of ^42Si and ^44S are oblate. The shape coexistence in ^40Mg, ^42Si and ^44S is evident. However, the ground state deformations of these isotones are not changed and the shape coexistence in ^42Si and ^44S vanishes when the tensor force is switched on. Taking ^42Si as an example, the disappearance of the shape coexistence is understood by analyzing the tensor force effect on the shell correction energies.
Bibliography:The tensor force effect on potential energy surfaces of the N = 28 neutron-rich isotones is investigated by using the deformed Skyrme Hartree-Fock-Bogoliubov approach with the T22 interaction. It is found that, without the tensor force, ^40Mg and ^46At have prolate and spherical ground states, respectively. The ground states of ^42Si and ^44S are oblate. The shape coexistence in ^40Mg, ^42Si and ^44S is evident. However, the ground state deformations of these isotones are not changed and the shape coexistence in ^42Si and ^44S vanishes when the tensor force is switched on. Taking ^42Si as an example, the disappearance of the shape coexistence is understood by analyzing the tensor force effect on the shell correction energies.
11-1959/O4
WANG Yan-Zhao, GU Jian-Zhong, YU Guo-Liang, HOU Zhao-Yu（ 1 Department of Mathematics and Physics, Shijiazhuang TieDao University, Shijiazhuang 050043 2 China Institute of Atomic Energy, Beijing 102413 3Department of Mathematics and Physics, North China Electric Power University, Baoding 071003）
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/10/102102