Multi-neutron emission of Cd isotopes

TL;DR

This paper investigates how phonon-phonon coupling affects beta-decay half-lives and multi-neutron emission probabilities in neutron-rich Cd isotopes near the r-process path, using a microscopic Skyrme-based model.

Contribution

It introduces a detailed microscopic analysis of PPC effects on decay properties of Cd isotopes with a focus on multi-neutron emission.

Findings

PPC causes significant redistribution of Gamow-Teller strength.

Multi-neutron emission probabilities are highly sensitive to PPC effects.

The model provides detailed insights into ground states and excitations of neutron-rich Cd isotopes.

Abstract

An influence of the phonon-phonon coupling (PPC) on the $\beta$-decay half-lives and multi-neutron emission probabilities is analysed within the microscopic model based on the Skyrme interaction with tensor components included. The finite-rank separable approximation is used in order to handle large two-quasiparticle spaces. The even-even nuclei near the r-process pathes at $N=82$ are studied. The characteristics of ground states, $2^+$ excitations and $\beta$-decay strength of the neutron-rich Cd isotopes are treated in detail. It is shown that a strong redistribution of the Gamow-Teller strength due to the PPC is mostly sensitive to the multi-neutron emission probability of the Cd isotopes.