Global Description of Beta Decay with the Axially-Deformed Skyrme Finite Amplitude Method: Extension to Odd-Mass and Odd-Odd Nuclei

TL;DR

This paper extends the finite amplitude method to calculate beta-decay rates for nearly all medium-mass and heavy neutron-rich nuclei, including odd-mass and odd-odd types, using Skyrme functionals.

Contribution

It introduces an extension of the FAM that handles odd-mass and odd-odd nuclei in beta-decay rate calculations, covering a broad range of isotopes.

Findings

Rates agree with experimental data where available.

Results are consistent with other global calculations.

Method efficiently covers a large nuclear chart.

Abstract

We use the finite amplitude method (FAM), an efficient implementation of the quasiparticle random phase approximation, to compute beta-decay rates with Skyrme energy-density functionals for 3983 nuclei, essentially all the medium-mass and heavy isotopes on the neutron rich side of stability. We employ an extension of the FAM that treats odd-mass and odd-odd nuclear ground states in the equal filling approximation. Our rates are in reasonable agreement both with experimental data where available and with rates from other global calculations.