Predictions on the alpha decay chains of superheavy nuclei with Z =121 within the range 290 $\le$ A $\le$ 339

Abstract

A systematic study on the alpha decay half lives of various isotopes of superheavy element \textit{Z} = 121 within the range 290 $\le$ A $\le$ 339 is presented for the first time using Coulomb and proximity potential model for deformed nuclei (CPPMDN). The calculated $\alpha$ decay half lives of the isotopes within our formalism match well with the values computed using Viola-Seaborg systematic, Universal curve of Poenaru et al., and the analytical formula of Royer. In our study by comparing the $\alpha$ decay half lives with the spontaneous fission half lives, we have predicted $2\alpha$ chain from ${}^{309,311,312}$121, $3\alpha$ chain from ${}^{310}$121 and $1\alpha$ chain from ${}^{313,314}$121. Clearly our study shows that the isotopes of superheavy element \textit{Z} = 121 within the mass range 309 $\le$ A $\le$ 314 will survive fission and can be synthesized and detected in the laboratory via alpha decay. We hope that our predictions will provide a new guide to future experiments.

Comments: 16 pages, 6 figures. arXiv admin note: text overlap with arXiv:1604.00296, arXiv:1504.00872