EFFECT OF NUCLEAR DEFORMATION ON THE a-DECAY HALF-LIVES

摘要

The influence of nuclear deformation on the a-decay half-lives of even-even nuclei from ground states to ground states is systematically investigated within the framework of a generalized liquid drop model (GLDM) by taking into account the deformation of the daughter nucleus. The preformation factors of a particle are extracted from the experimental a-decay half-lives of 158 even-even nuclei for 62 < Z < 118, and an analytic expression for calculating a clustering factor is proposed. The experimental half-lives arc accurately reproduced and some predictions are reasonably made by employing the proposed preformation formula.