An Investigation into Properties for {_\mathbf{66}^{\mathbf{156}}}\‎mathbit{Dy} Isotope Using IBM-1 and IVBM‎‏ ‏Model

Date

2024-9

Type

Article

Journal title

Jordan Journal of Physics

Issue

Vol. 3 No. 17

Author(s)

D. Nasef

Pages

349 - 360

Abstract

The {_66^{156}}Dy isotopes in O (6) region were investigated. The positive ground-state band of ‎‎{_66^{156}}Dy nuclei was also calculated using Interacting Boson Model ‎(IBM-1) and Interacting ‎Vector Boson Model (IVBM). The negative parity band energies of the above isotope have been ‎calculated using (IVBM) only. We Plotd the ratios “ \frac{E(I+2)}{{E(2}_1^+)}, \frac{E(I+‎‎2)}{E(I)},\ r(\frac{\left(I+2\right)}{I}) “and the E-GOS curve as a function of the spin (I) to ‎investigate the properties of the yrast band, Accordingly, the best-fit values of parameters are used ‎to construct the Hamiltonian; the electromagnetic transition probability B(E2) of this nucleus is ‎also determined. Theoretical energy levels of Dysprosium-(156) isotope with neutron number ‎N=90 and spin parity up to {30}_1^+ were obtained using the MATLAP-20 simulation program. ‎The comparison of these calculated energy levels with the corresponding experimentally measured ‎ones shows a good agreement between them. Comparing these results with experimental data ‎shows good agreement between them. The results also ‎draw our attention to the fact that the ‎nucleus of interest deforms and exhibits gamma-instability ‎properties.‎

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