Structural properties and decay modes of Z = 1 2 2, 120 and 118 superheavy nuclei

Abstract

Structural properties and the decay modes of the superheavy elements Z = 122, 120 and 118 are studied in a microscopic framework. We evaluate the binding energy, one-and two-proton and neutron separation energy, shell correction and density profile of even and odd isotopes of Z = 122, 120, 118 (284 ≤ A ≤ 352) which show a reasonable match with FRDM results and the available experimental data. Equilibrium shape and deformation of the superheavy region are predicted. We investigate the possible decay modes of this region specifically α-decay, spontaneous fission (SF) and the β-decay and evaluate the probable α-decay chains. The phenomena of bubble like structure in the charge density is predicted in 330122, 292,328120 and 326118 with significant depletion fraction around 20-24% which increases with increasing Coulomb energy and diminishes with increasing isospin (N-Z) values exhibiting the fact that the coulomb forces are the main driving force in the central depletion in superheavy systems.