Bulg. J. Phys. vol.48 no.5-6 (2021), pp. 514-523

A γ-Rigid Solution of the Bohr Hamiltonian with Deformation-Dependent Mass Term for Kratzer Potential and γ = 30?

S. Ait El Korchi1, S. Baid1, P. Buganu2, M. Chabab1, A. El Batoul1, A. Lahbas1,3, M. Oulne1
1High Energy Physics and Astrophysics Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, P. O. B. 2390, Marrakesh 40000, Morocco
2Horia Hulubei$-$National Institute of Physics and Nuclear Engineering, 077125, Bucharest-Magurele, Romania
3ESMaR, Department of Physics, Faculty of Science, Mohammed V University in Rabat, Rabat 10000, Morocco
Abstract. In this work, the Davydov-Chaban Hamiltonian, describing the collective motion of γ-rigid atomic nuclei, is amended by allowing the mass parameter to depend on the nuclear deformation. Further, Z(4)-DDM (Deformation-Dependent Mass) model is proposed by considering the Kratzer potential for the β variable, and solving the problem by techniques of asymptotic iteration method (AIM). The results of the calculated spectra and B(E2) transition rates for series of 192-196Pt isotopes are compared with the corresponding experimental data as well as with other theoretical models. Exact analytical expressions are derived for spectra and normalized wave functions of the Kratzer potential. The obtained results show an overall good agreement with the experimental data and an important improvement in respect to other models.

doi: https://doi.org/10.55318/bgjp.2021.48.5-6.514

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