The competition between α-decay and spontaneous fission for even–even isotopes of superheavy nuclei in the range 106≤Z≤124.

The α -decay and spontaneous fission (SF) half-lives for even–even isotopes of superheavy nuclei in the range 1 0 6 ≤ Z ≤ 1 2 4 are predicted using nuclear double-folding and Coulomb potentials. The α -decay half-lives are computed based on WKB approximation for tunneling probability through potential barrier. The half-lives of SF have also been calculated using a semi-empirical relation constructed by Santhosh et al. [Nucl. Phys. A832, 220 (2009)]. Our calculated half-lives of cold SF and α -decay are compared with the available experimental data. This comparison indicates that our obtained half-lives are in good agreement with the available experimental data. The competition between α -decay and SF is also analyzed in detail and the decay modes are predicted for the unknown cases. Variation of α -decay and SF half-lives with mass number of the parent isotopes for each nucleus revealed the major role played with shell effect. [ABSTRACT FROM AUTHOR]