Structural properties and decay modes of Z = 122, 120 and 118 superheavy nuclei

Structural properties and the decay modes of the superheavy elements [Formula: see text] 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 [Formula: see text] [Formula: see text] 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 [Formula: see text]-decay, spontaneous fission (SF) and the [Formula: see text]-decay and evaluate the probable [Formula: see text]-decay chains. The phenomena of bubble like structure in the charge density is predicted in [Formula: see text], [Formula: see text] and [Formula: see text] with significant depletion fraction around 20–24% which increases with increasing Coulomb energy and diminishes with increasing isospin ([Formula: see text]) values exhibiting the fact that the coulomb forces are the main driving force in the central depletion in superheavy systems.

Distinct ground state features and the decay chains of Z = 121 superheavy nuclei

A fully systematic study of even and odd isotopes [Formula: see text] of [Formula: see text] superheavy nuclei is presented in theoretical frameworks of Relativistic mean-field plus state dependent BCS approach and macroscopic–microscopic approach with triaxially deformed Nilsson-Strutinsky prescription. The ground state properties namely shell correction, binding energy, two- and one-proton and neutron separation energy, shape, deformation, density profile and the radius are estimated that show strong evidences for magicity in [Formula: see text], 228. Central depletion in the charge density due to large repulsive Coulomb field indicating bubble like structure is reported. A comprehensive analysis for the possible decay modes specifically [Formula: see text]-decay and spontaneous fission (SF) is presented and the probable [Formula: see text]-decay chains are evaluated. Results are compared with Finite Range Droplet Model (FRDM) calculations and the available experimental data which show excellent agreement.