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

TL;DR

This paper investigates how tensor interactions influence Gamow-Teller transition strength fragmentation and neutron emission probabilities in atomic nuclei, specifically focusing on $^{52}$Ca, using a microscopic model that includes complex configuration effects.

Contribution

It introduces a microscopic model incorporating tensor terms and $2p-2h$ configurations to better understand strength fragmentation and neutron emission in $eta$-decay.

Findings

Fragmentation redistributes Gamow-Teller strength.

The model accurately predicts neutron emission probabilities.

Tensor interactions significantly affect decay properties.

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.