What question did this study set out to answer?

The research aims to describe the properties of 190Hg using the Interacting Boson Models, IBM1 and IBM2.

June 20, 2026Open Access

Shape evolution and collective excitations in 190Hg: A study using IBM1 and IBM2 models

AAAlyaa A. Abd-AljbarBaghdad Medical City MMMahdi J. S. Al MusawiUniversity of Kerbala HKHuda H. KassimUniversity of Kerbala

Key Points

The research aims to describe the properties of 190Hg using the Interacting Boson Models, IBM1 and IBM2.
Used IBM1 and IBM2 to analyze the energy levels and transitions in 190Hg.
Applied a fitting procedure to determine parameters for accurate energy level calculations.
Compared calculated energy bands and quadrupole transition strengths with experimental data.
IBM1 and IBM2 accurately reproduce the ground, gamma, and beta bands energy levels of 190Hg.
Quadrupole transition strengths from both models are consistent with experimental results.
Potential energy surfaces in the O(6) dynamical symmetry were determined and aligned with experimental findings.

Abstract

The Interacting Boson Models, IBM1 and IBM2, analyzed in their O(6) limit are used to describe the properties of the 190 Hg isotope. A fitting procedure is used to determine the most accurate parameters to the calculated energy levels of this nucleus. The calculated ground, gamma, and beta bands energy of each model are compared to the previously measured data. Quadrupole electromagnetic transition strengths for 190 Hg, obtained from both IBM1 and IBM2, are presented and associated with previously experimental results. Finally, potential energy surfaces (PES) of 190 Hg in the dynamical symmetry O(6) of the IBM1 as an occupation of the restriction of the deformation are determined and discussed. All calculations are satisfied with experimental data.

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