Exotic behavior of Ni isotopes and model dependent shell structures

The study of nuclear shell structures away from the valley of stability is one of the current topics in nuclear structure physics. The changes in the shell structure are due to nuclear forces, referred to as shell evolution. Recent theoretical and experimental studies on exotic nuclei with unbalanced Z and N cast challenge these pictures. Formula and its modified forms to study this nucleus as a recent study says N=34 may be the next new magic number. This is expected because some of the standard shell closures can disappear and new ones are known to appear. While the present study reveals that the new shell and sub-shell closure are found at N= 28, 34, 40, 45, 50, and 70 which highlights our limited understanding of the neutron rich nuclei but needs further investigations