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Predictions of Alpha Decay Half lives of Heavy and Superheavy Elements

C. Samanta·P. Roy Chowdhury·D. N. Basu
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Abstract

Theoretical estimates for the lifetimes of several isotopes of heavy elements with Z=102-120 are presented by calculating the quantum mechanical tunneling probability in a WKB framework and using microscopic nucleus-nucleus potential obtained by folding the densities of interacting nuclei with the DDM3Y effective nuclear interaction. The $α$-decay half lives calculated in this formalism using the experimental $Q$-values are in good agreement over a wide range of experimental data. Half lives are also calculated using $Q$-values extracted from two mass formulae. The Viola-Seaborg-Sobiczewski (VSS) estimates of $α$-decay half lives with the same $Q$-values are presented for comparison. The half life calculations are found to be quite sensitive to the choice of $Q$-values. Comparison with the experimental data delineates the inadequacies of older mass predictions in the domain of heavy and superheavy elements as compared to the newer one by Muntian-Hofmann-Patyk-Sobiczewski, and highlights necessity of a more accurate mass formula which can predict $Q$-values with even higher precision.

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C. Samanta, P. Roy Chowdhury, D. N. Basu. 2007-05-28. Predictions of Alpha Decay Half lives of Heavy and Superheavy Elements. https://doi.org/10.1016/j.nuclphysa.2007.04.001

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