INVESTIGATION OF THE NUCLEAR STRUCTURE OF THE ISOTOPES 170−180Os

Abstract

Interacting Boson Model (IBM-1), Semi Empirical Formula (SEF), and New Empirical Equation (NEE) methods were utilized to determine the energy states of the ground-state (GS), β and γ-bands in the 170-180Os isotopes. The results of the study on the GS, β, and γ bands suggest that IBM-1, SEF, NEE, and existing empirical evidence show some agreement, albeit with some discrepancies. The NEE results for GS, β, and γ bands are more reliable with empirical data than the estimates derived from the IBM-1 and SEF models. The reduced transition probabilities B(E2) of the IBM-1 model correspond well to the experimental data. In the GSB, the energies of the 6+, 8+, and 10+ states are not precisely modeled in the IBM-1 model. The R4/2 values of low-lying energy levels of Os isotopes fluctuate gradually with increasing neutron numbers. The EPS counter indicates that the transition limit of the 170-180Os isotopes has a rotational–vibrational γ-soft transition.