Search for shape-isomers in the Pt-Hg-Pb region

2025/11/08 by Bartel, J., Molique, H., Nerlo-Pomorska, B. +2
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quasicrystal Structures and Properties #Thermodynamic and Structural Properties of Metals and Alloys

paper · doi:10.48550/arxiv.2511.05918

openalex publication_date 2025/11/08 · openalex created_date 2025/11/12 · openalex updated_date 2026/07/28

Abstract

Potential energy surfaces of nine even-even isotopes of Pt, Hg, and Pb around ¹⁸⁶Pt are evaluated within a macroscopic-microscopic model based on the Lublin-Strasbourg-Drop macroscopic energy and the microscopic energy obtained using the Yukawa-folded mean-field potential to establish the Strutinski shell corrections and the pairing correlation energy through the BCS approach with a monopole pairing force. The rapidly converging Fourier-over-Spheroid shape parametrization is used to describe nuclear deformations. The stability of the identified shape isomeric states with respect to non-axial and higher-order deformations is investigated. It is also found that in the description of non-axial deformations special attention needs to be devoted to the orientation of the triaxial shape. For the example of the ¹⁸⁶Hg nucleus, where three prolate shape-isomeric states are found, it is shown that the potential energy surface obtained in our model is close to the one obtained in the Hartree-Fock-Bogoliubov theory with the Gogny energy-density functional.

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