Yrast states and electromagnetic reduced transition properties of 122Te by means of interacting boson model-1

Abstract

In this paper, the yrast states and the electric reduced transition probabilities B(E2) ? from gamma transition 8+ to 6+, 6+ to 4+, 4+ to 2+ and 2+ to 0+ states of neutron rich 122Te nucleus in the frame work of Interacting Boson Model-I (IBM-I) have carried out. The calculated results have been compared with the available experimental values. The ratio of the excitation energies of first 4+ and 2+ excited states (R4/2), have also been calculated for this nucleus. An acceptable degree of agreement between the predictions of IBM-I model and experiment is achieved. Moreover, as a measure to quantify evolution, we studied the transition rate R = B(E2 : L+ ? (L - 2)+) / B(E2 : 2+ ? 0+) of some of the low-lying quadrupole collective states in comparison to the available experimental data. The IBM-I formula for energy levels and the reduced transition probabilities B(E2) have been analytically deduced in the U(5) limit for a few yrast states transitions in 122Te isotope.