Exploring the decay probability of neutron-rich superheavy nuclei

TL;DR

This paper investigates decay modes of superheavy nuclei with Z=118 and 120 using a relativistic mean field model, highlighting the importance of asymmetry parameters in decay half-life predictions.

Contribution

It introduces the use of asymmetry parameter $$ and neutron-proton surface asymmetry $R_{}$ to better understand decay preformation factors in superheavy nuclei.

Findings

Asymmetry parameter $$ influences decay half-life calculations.

Neutron-proton surface asymmetry $R_{}$ is crucial for decay modeling.

The study provides new insights into decay mechanisms of superheavy elements.

Abstract

The modes of decay for the even-even isotopes of superheavy nuclei of Z = 118 and 120 with neutron number $160 \leq N \leq 204$ are investigated in the framework of the axially deformed relativistic mean field model. The asymmetry parameter $\eta$ and the relative neutron-proton asymmetry of the surface to the center ($R_{\eta}$) are estimated for the ground state density distributions of the nuclei. We suggest that the resulting asymmetry parameter $\eta$ and the relative neutron-proton asymmetry $R_{\eta}$ of the density play a crucial role in the preformation factor of the decay half life.