On Shape Coexistence and Shape Isomerism in Neutron Deficient Pt–Hg–Pb Nuclei

A Fourier parametrization of nuclear shapes and the macroscopic–microscopic method are used to evaluate the potential energy surfaces (PES) of nuclei in a 4-dimensional deformation space. The effect of different orientations in space of the nucleus is taken into account when deformations higher than quadrupole are considered. The effect on the PES of exact solving the pairing eigenproblem is also studied. Abstract Published by the Jagiellonian University 2026 authors