Bulg. J. Phys. vol.48 no.5-6 (2021), pp. 495-504

Microscopic Description of Shape Transitions and Shape Coexistence in Hg Isotopes

V. Prassa1, K.E. Karakatsanis2,3
1Physics Department, University of Thessaly, Lamia GR-35100, Greece
2Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
3Physics Department, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece
Abstract. A microscopic analysis of characteristic signatures of nuclear ground-state shape transitions and coexisting nuclear shapes in neutron deficient even-even Hg isotopes is presented using a five dimensional collective Hamiltonian (5DCH) based on covariant density-functional theory. The triaxial deformation energy surfaces suggest coexisting configurations in 190Hg, γ-soft potential energy surfaces in 192-198Hg and a more spherical structure in 200Hg. The corresponding 5DCH model calculations confirm the structural evolution in this region and suggest more increased collectivity than what can be deduced from the data.

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