Beta decay rates for r-process for nuclei near neutron number N=82

TL;DR

This paper calculates beta decay rates for neutron-rich nuclei near N=82 to improve r-process nucleosynthesis models, using spectral distribution methods and comparing with known data to predict unmeasured half-lives.

Contribution

It introduces a spectral distribution approach to estimate beta decay rates for nuclei near N=82, including predictions for nuclei close to the neutron drip line.

Findings

Calculated half-lives agree with observed data.

Predicted decay rates for unmeasured neutron-rich nuclei.

Provided data useful for r-process nucleosynthesis modeling.

Abstract

For r-process nucleosynthesis the beta decay rates of very neutron-rich nuclei are important ingredients. We consider the region around the neutron number N=82 and calculate the half-lives and rates for a number of nuclei. Forms for beta strength functions based on spectral distribution methods are used. The calculated half-lives are first compared to the observed values and then predictions are made for very neutron-rich nuclei close to drip line for which no experimental values are available.