Beta-decay Studies in N~Z Nuclei Using No-Core Configuration-Interaction Model

TL;DR

This paper introduces a no-core configuration-interaction model based on density functional theory, successfully applying it to nuclear spectra and beta-decay corrections without parameter readjustment.

Contribution

The paper presents a novel no-core model combining isospin and angular momentum projection within density functional theory, applied to nuclear spectra and decay corrections.

Findings

Accurately reproduces 0+ spectra in 62Zn, 38Ca, and 38K.

Provides isospin-symmetry-breaking corrections for superallowed beta-decay.

Model works without adjusting Skyrme interaction parameters.

Abstract

The no-core configuration-interaction model based on the isospin- and angular-momentum projected density functional formalism is introduced. Two applications of the model are presented: (i) determination of spectra of 0+ states in 62Zn and (ii) determination of isospin-symmetry-breaking corrections to superallowed beta-decay between isobaric-analogue 0+ states in 38Ca and 38K. It is shown that, without readjusting a single parameter of the underlying Skyrme interaction, in all three nuclei, the model reproduces the 0+ spectra surprisingly well.