Studies on alpha, cluster and halo emissions from Z = 128–132 superheavy nuclei leading to doubly magic ³¹⁰126 daughter nuclei

Abstract

Alpha, cluster and halo emissions from Z = 128–132 superheavy nuclei have been studied within the framework of the Coulomb and Proximity Potential Model to verify the existence of an island of stability at ³¹⁰126. The Q values are computed using the WS4 model, table of KTUY, and FRDM (2012). The results of our calculations are then compared with predictions of other phenomenological models; Universal Decay Law (UDL) of Qi et al., scaling law by Horoi et al., Unified Description formula (UD) of Ni et al., and universal curve (UNIV) of Poenaru et al. The CPPM and other phenomenological models predict the neutron shell closure at N = 184. The proton magicity at Z = 126 is verified by computing the alpha decay half-lives of isotones of superheavy elements Z = 114–130 with N = 196. Possibility for the neutron shell closure at N = 194, 196, 200, 212, and 218 has also been identified from the plots of $\log_{10} T_{{{1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}}}$ verses the neutron number of daughter nuclei. Based on our calculations, a new island of stability beyond ²⁹⁸114 has been identified at ³¹⁰126.