The spontaneous fission of the 280Ds and 282Cn superheavy nuclei has been studied using the isotopic yield method. The Coulomb and the nuclear proximity potentials are considered for the fission barrier. The energy released in fission (Q-values), the driving potential (V −Q), the penetrability, the decay constant and the fission yield for each fragmentation have been calculated. As expected, with respect to the mass and charge asymmetry, the most favorable fragmentation in the binary spontaneous fission occurs for the highest Q-value and consequently for the lowest value of the driving potential. For the spontaneous fission of 280Ds and 282Cn superheavy isotopes, the highest yields have been seen for 134Te(N = 82, Z = 52) and 136Xe(N = 82, Z = 54) closed shell magic isotopes, respectively. The role of magic and near magic closed shell fragmentation is indicated by the analysis of the relative yields. The spontaneous fission halflives of 280Ds and 282Cn have also been obtained and compared with the results of other theoretical and semi-empirical methods as well as experimental data. The comparison has revealed that the results of the present study acceptably agreed with the experimental data than the other theoretical and semi-empirical methods.
