Strength fragmentation of Gamow-Teller transitions and delayed neutron emission of atomic nuclei

Abstract

Starting from a Skyrme interaction with tensor terms, the $\beta$-decay rates of ${}^{52}$Ca have been studied within a microscopic model including the $2p-2h$ configuration effects. We observe a redistribution of the strength of Gamow-Teller transitions due to the $2p-2h$ fragmentation. Taking into account this effect results in a satisfactory description of the neutron emission probability of the $\beta$-decay in ${}^{52}$Ca.

Comments: 4 pages, accepted for publication in Physics of Particles and Nuclei