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.

doi: https://doi.org/10.55318/bgjp.2021.48.5-6.495

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