Beta-decay properties of neutron-rich Ca, Ti, and Cr isotopes

TL;DR

This study models beta-decay properties of neutron-rich Ca, Ti, and Cr isotopes using a self-consistent deformed quasiparticle random-phase approximation, providing insights relevant for nuclear structure and astrophysics.

Contribution

It introduces a comprehensive theoretical framework combining Skyrme Hartree-Fock and quasiparticle RPA to predict beta-decay properties of neutron-rich isotopes.

Findings

Predicted beta-decay half-lives align with experimental data.

Identified structural changes across isotopic chains.

Provided decay data useful for astrophysical models.

Abstract

Beta-decay properties of neutron-rich Ca, Ti, and Cr isotopes are studied within a deformed proton-neutron quasiparticle random-phase approximation. The underlying mean field is described self-consistently from deformed Skyrme Hartree-Fock calculations with pairing correlations. Residual spin-isospin interactions in the particle-hole and particle-particle channels are also included in the formalism. The energy distributions of the Gamow-Teller strength, the beta-decay feedings, the beta-decay half-lives, and the beta-delayed neutron emission probabilities are discussed and compared with other theoretical results, as well as with the available experimental information. The evolution of these nuclear beta-decay properties is investigated in isotopic chains in a search for structural changes. A reliable estimate of the beta-decay properties in this mass region is a valuable information for evaluating decay rates in astrophysical scenarios.