Theoretical description of the deformation properties for 154-164Gd isotopes

The 154-164Gd isotopes in SU(3) region were investigated. For these nuclei, the positive ground-state band of 154-164Gd has been calculated using Bohr-Mottelson Model, Interacting Vector Boson Model and Interacting Boson Model, while the negative-parity band of 154-164Gd has been calculated using Bohr-Mottelson Model and Interacting Vector Boson Model only. To determine the property of the ground-state band, the ratio (r(I+2)/I) and E-GOS curve (Eγ/I) as a function of the spin (I) have been drawn. The reduced transition probabilities B(E2) of these nuclei were calculated. The results were compared with the experimental data and the previous calculations. It is shown that there is a good agreement between the results found and especially with the experimental ones. The potential energy surface (PES) has been calculated within the framework using interacting boson model (IBM-1). The contour plot of the potential energy surfaces shows that the interested nuclei are deformed and have rotational characters.