Heavy particle radioactivity from superheavy nuclei leading to 298114 daughter nuclei

The feasibility for the alpha decay and the heavy particle decay from the even-even superheavy (SH) nuclei with Z=116-124 has been studied within the Coulomb and proximity potential model (CPPM). Our predicted half lives agree well with the values evaluated using the Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al. The spontaneous fission half lives of the corresponding parents have also been evaluated using the semi-empirical formula of Santhosh et al. Within our fission model, we have studied the cluster formation probability for various clusters and the maximum cluster formation probability is found for the decay accompanying 298114. In the plots for log10(T1/2) against the neutron number of the daughter in the corresponding decay, the half life is found to be the minimum for the decay leading to 298114 (Z=114, N=184). Most of the predicted half lives are well within the present upper limit for measurements (T1/2<1030s) and the computed alpha half lives for 290,292Lv agree well with the experimental data.