Gamow-Teller properties of the double beta-decay partners 116Cd(Sn) and 150Nd(Sm)

TL;DR

This paper investigates the Gamow-Teller properties of double beta-decay partners 116Cd and 150Nd using a microscopic deformed QRPA approach, comparing results with experimental data to evaluate nuclear matrix elements.

Contribution

It introduces a deformed proton-neutron QRPA model based on Skyrme mean fields to study GT properties and double-beta decay matrix elements.

Findings

Good agreement with experimental GT strength distributions

Accurate evaluation of two-neutrino double-beta decay matrix elements

Insights into nuclear structure effects on decay processes

Abstract

The two Gamow-Teller (GT) branches connecting the double-beta decay partners (116Cd, 116Sn) and (150Nd, 150Sm) with the intermediate nuclei 116In and 150Pm are studied within a microscopic approach based on a deformed proton-neutron quasiparticle random-phase approximation built on a Skyrme selfconsistent mean field with pairing correlations and spin-isospin residual forces. The results are compared with the experimental GT strength distributions extracted from charge-exchange reactions. Combining the two branches, the nuclear matrix elements for the two-neutrino double-beta decay are evaluated and compared to experimental values derived from the measured half-lives.