Elsevier

Nuclear Physics A

Volume 825, Issues 3–4, 1 July 2009, Pages 159-174
Nuclear Physics A

Alpha radioactivity in heavy and super heavy elements

https://doi.org/10.1016/j.nuclphysa.2009.04.012Get rights and content

Abstract

The alpha decay half lives and other characteristics of 190 even–even super heavy elements in the range 100Z120 has been determined within the Coulomb and Proximity Potential Model (CPPM). The computed Q values and log10(T1/2) values plotted against neutron number of parent nuclei were studied and it was found that neutron shell closures in the super heavy region occur at N=162 and N=184. The alpha decay half lives for parent nuclei with atomic number Z=106 onwards were compared with experimental data and are found to be in good agreement with each other. A semi-empirical formula for alpha decay half lives has been formulated by making least squares fit to the available experimental data. The new semi-empirical formula was used for calculating half lives of isotopes of nuclei in the chosen range 100Z120. These results when compared with the corresponding experimental half life values and the values calculated using GLDM and Viola–Seaborg systematics showed good agreement.

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