Theoretical Description of even- even Platinum Pt-186 nucleus using IBM and (VMI) Models

Abstract

The aim of this study, is to investigate, in a phenomenological way, the backbending effect in platinum Pt-186 nucleus, in order to get a good description of the bends by using new parameters. VMI model and interacting boson model IBM-1 have been used to perform this research for a heavy mass nucleus (Z = 78). Energy ratios and arrangement of the bands show that the platinum Pt-186 have O(6)-SU(3) dynamical symmetry. Our current calculations gave results that are reasonably consistent with the most recent experimental data, especially the results calculated according to the VMI-model. Variable moment of inertia has been applied to describe successfully the effect of backbending in deformed even-even Pt-186 nucleus. Backbending was observed in the ground and β-bands, due to the change of the moment of inertia but not for (γ1, γ2 bands, because no changing in the moment of inertia.

Keywords

• Nuclear structure
• IBM
• nuclear physics
• VMI model
• back-bending