$\alpha$-decay properties of ${}^{296}118$ from double-folding potentials

$\alpha \text{−}\mathrm{decay}$ properties of the yet unknown nucleus ${}^{296}118$ are predicted using the systematic behavior of parameters of $\alpha$-nucleus double-folding potentials. The results are $Q_{\alpha }=11.655\pm 0.095\mathrm{MeV}$ and $T_{1/2}=0.825\mathrm{ms}$ with an uncertainty of about a factor of 4.

Figure 1

Volume integrals $J_R$ for superheavy nuclei as a function of $Z_D$ (upper), $N_D$ (middle), and $A_D$ (lower). Data for chain-1 (blue triangles) and chain-2 (red diamonds) have been added. Otherwise, this figure is identical to Fig. 3 of my previous study [2]; the lines are quadratic fits to the experimental data available in 2006.

Figure 2

Preformation factors $P$ as a function of the mass number $A_D$ of the daughter nucleus, taken from [2] and extended by data for chain-1 (blue triangles) and chain-2 (red diamonds). The horizontal lines indicate an average value of $P\approx 8\%$ (full line) and typical uncertainties of a factor of three (dotted lines); taken from [2].

Figure 3

Potential strength parameter $\lambda$ for chain-1 (blue triangles) and for chain-2 (red diamonds). The full symbols are derived from experimental data [34]; the open diamond is the extrapolation for the unknown nucleus ${}^{296}118$. Further discussion see text.

Figure 4

Extrapolation of the preformation factor $P$ to ${}^{296}118$.