Probable decay modes of even-even superheavy nuclei

Cluster-decay half-lives (T-1/2(c,th)(s)) of even-even nuclei are calculated employing interaction potential involving Coulomb and proximity potentials and, the obtained results are compared with the experimental ones. In order to study cluster radioactivity in even-even superheavy nuclei (SHN), we evaluate the required disintegration energies (Q(c)-values) utilizing periodic-orbit theory within microscopic-macroscopic formalism and hence, predict the logarithmic values of T-1/2(c,th)'s for even-even (298-312)Og and (296-310)120 nuclei. Among various isotopes of daughter nuclei, products produced with minimum value of Gibbs free energy are chosen for our investigation. Also, an analysis of the branching ratios enables us to determine the dominant mode of decay among alpha - decay, spontaneous fission (SF) and cluster-decay in these SHN. The emissions of Kr-90 from (298)Og and Sr-94 cluster from (296,298)120 SHN are found to be the dominant mode of decay. Our results are in agreement with those obtained using UDL method except for few cases. We believe that this work can play a significant role in the experiments leading to identification of exotic nuclei.