Theoretical Insights into Nuclear Structure of ¹⁹⁶Pt

¹ Department of Physics and Astronomical Sciences, Central University of Jammu, Jammu (181143), J&K, India
² Government Degree College, Shopian (192303), J&K, India
³ Department of Physics, University of Jammu (180006), J&K, India
⁴ Department of Physics, Islamic University of Science and Technology, Awantipora (192122), J&K, India

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
^** e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 5 March 2026

Abstract

A theoretical investigation of the nuclear structure of ¹⁹⁶Pt has been carried out within the framework of Triaxial Projected Shell Model (TPSM) to explore its shape evolution, shape coexistence and γ-soft nature. The potential energy surface (PES) shows two distinct minima corresponding to prolate and oblate deformation indicating the presence ofshape coexistence. Calculated yrast states reproduce the available experimental data reasonably well. At lower spins, results are better reproduced by prolate deformation, whereas at higher spins, oblate deformation reproduces the experimental data. While γ band is reproduced by prolate deformation predominantly. The analysis of energy staggering parameters and R_4/2 ratios confirm the γ soft triaxial nature of this nucleus. The observed rotational alignment near I = 10ℏ suggests the alignment of i_13/2 neutron pairs. Furthermore, the calculated values of B(E2) strengths show good accuracy with the experimental data available for low spins only, supporting the reliability of adopted deformation parameters. Overall, this study offers microscopic insight into the triaxial deformation and shape coexistence in ¹⁹⁶Pt, confirming its transitional nature in the Os–Pt–Hg region.