Superheavy elements and decay properties

Abstract

The α decay properties of the isotopes of Z = 115, 117, 118 and 119 have been extensively investigated, focussing on the newly synthesized isotopes within the Coulomb and proximity potential model for deformed nuclei (CPPMDN). The α half-lives have also been evaluated using the Viola–Seaborg systematic (VSS) and the analytical formulae of Royer and it can be seen that our calculated values match well with these theoretical values. The mode of decay of these isotopes has also been studied by calculating the spontaneous fission half-lives. Thus, we have predicted 4α chains from 287115, 3α chains from 288115, 3α chains from 293117, 4 α chains from 294117 and 3α chains from 294118 and, it can be seen that our predictions on the α decay chains also match well with the experimental observations. The study on Z = 119 has predicted six consistent α chains from 292−295119, 5 α chains from 296119, 4 α chains from 297119 and 3 α chains from 298,299119. Thus, through our study on isotopes of Z = 115, 117, 118 and 119 superheavy nuclei, we could predict the range of isotopes that may be detectable using α decay and we hope that the findings on the isotopes of Z = 119 will provide a new guide for future experiments.