Systematic study of $\alpha$ decay half-lives for even-even nuclei within a two-potential approach

TL;DR

This paper systematically analyzes alpha decay half-lives of even-even nuclei from Z=62 to Z=118 using a two-potential approach, incorporating nuclear shell effects and isospin influence to improve prediction accuracy.

Contribution

It introduces a hindrance factor linked to alpha preformation probability and considers isospin effects, enhancing the accuracy of half-life predictions compared to existing models.

Findings

Successfully reproduces experimental half-lives with high accuracy.

Incorporating isospin effects improves results by approximately 7.3%.

Provides a comprehensive systematic study across a wide range of nuclei.

Abstract

$\alpha$ decay is a common and important process for natural radioactivity of heavy and superheavy nuclei. The $\alpha$ decay half-lives for even-even nuclei from Z=62 to Z=118 are systematically researched based on the two-potential approach with a quasi-stationary state approximation. To describe the deviations between experimental half-lives and calculated results due to the nuclear shell structure, a hindrance factor related with $\alpha$ particle preformation probability is introduced. Our results can well reproduce the experimental data equally to the density-dependent cluster model and the generalized liquid drop model. We also study the isospin effect of nuclear potential in this work. Considering the isospin effect the calculated results improved about 7.3$\%$.