Partial α-decay half-lives of ground to ground and ground to excited states of Thorium family

摘要

Partial half-lives andQ-values of allowedα-decay for Thorium family are evaluated by using theWKBapproximation. In order to calculate the partial half-lives, transition probabilities from ground to ground and ground to excited states of daughter nuclei are obtained. Theα-decay potential barrier includes deformed volume, surface, and Coulomb parts in the deformed liquid drop model (DLDM), deformed Woods-Saxon nuclear potential and centrifugal term. The quadrupole and the hexadecapole deformations are considered in the calculations. Calculated half-lives are compared to the results of other theoretical models as well as experimental data. Comparison of the present study and other theoretical methods with experimental data indicated that the predicted half-lives using current approach are well agreed with the experimental data than results ofUMADACandCPPMDNtheoretical models. Moreover, the evaluated half-lives correspond well with the Geiger-Nuttall empirical formula.