Alpha decay, cluster decay and spontaneous fission in294–326122 isotopes

The cluster decay half lives for 294–326 122 isotopes are computed for various clusters ranging from an alpha particle to 70 Ni within the Coulomb and proximity potential model. The computed alpha decay half lives agree with the values calculated using the Viola–Seaborg–Sobiczewski (VSS) systematic formulas. The half lives for spontaneous fission of these isotopes are carried out using the formula of Ren et al . It is found that the alpha emission is the dominant mode of decay for isotopes with mass number A < 306, and for those with A > 306 spontaneous fission is found to be dominant. The demarcation between alpha decay and spontaneous fission is at 306 122, which shows the presence of a spherical neutron shell closure at N = 184.