On Gamow-Teller strength distributions for $\beta\beta$-decaying nuclei within continuum-QRPA

TL;DR

This paper develops a continuum-QRPA method to accurately describe Gamow-Teller strength distributions in nuclei undergoing double beta decay, comparing results with experimental data for several isotopic pairs.

Contribution

It introduces an isospin-selfconsistent pn-continuum-QRPA approach for modeling Gamow-Teller strength in $etaeta$-decaying nuclei, enhancing theoretical accuracy.

Findings

Good agreement with experimental Gamow-Teller distributions

Effective modeling of open-shell nuclei

Provides insights into double beta decay mechanisms

Abstract

An isospin-selfconsistent pn-continuum-QRPA approach is formulated and applied to describe the Gamow-Teller strength distributions for $\beta\beta$-decaying open-shell nuclei. The calculation results obtained for the pairs of nuclei $^{76}$Ge-Se, $^{100}$Mo-Ru, $^{116}$Cd-Sn, and $^{130}$Te-Xe are compared with available experimental data.