Effects of Two-Particle–two-hole Configurations and Tensor Force on Β Decay of Magic Nuclei

M. J. Yang,H. Sagawa,C. L. Bai,H. Q. Zhang

PHYSICAL REVIEW C（2023）

Sichuan Univ | Univ Aizu | China Inst Atom Energy

Cited 4|Views13

Abstract

The beta-decay half-lives of four semimagic and magic nuclei, 34Si, 68,78Ni, and 132Sn, have been investigated using the self-consistent Hartree-Fock (HF) plus subtracted second random-phase approximation (SSRPA) model with Skyrme energy density functions (EDFs). The inclusion of the two-particle-two-hole (2p-2h) configurations in SSRPA model shifts low-lying Gamow-Teller (GT) states downward. It leads to an increase of the beta-decay phase space, which ensures the half-lives of the four nuclei are finite and reduces the beta-decay half-lives dramatically. The effect of tensor interaction on the beta-decay half-life in the SSRPA model is to change the half-lives greatly by about one to two orders of magnitude with respect to the ones obtained without tensor force.

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