Correlation between ground state lifetime and valence nucleons for isotopic chains

Abstract

The variation of β-decay lifetime of the ground state of various isotope chains display a systematic behavior with respect to the ratio of the number of valence neutron particles or holes and the maximum possible number of neutron particles or holes in that shell. Lifetimes, depending on the particle or hole nature of the protons and neutrons, as well as whether they belong to the same shell or not, are found to exhibit similar increasing or decreasing trends and display similar behavior with respect to variation of the above-mentioned ratio.