摘要
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.
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.
基金
Supported hy tile National Natural Science Foundation of China under Graut Nos 11275271 and 11305109, tile Funds for Creative Research Groups of China under Grant No 11321064, the Natural Science Foundation of Hebei Province of China under Grant Nos A2012210043 and A2014210005, and the Specialized Research Foundation of Shijiazhuang TieDao University under Grant No Z110197.
