Abstract
In this paper, the yrast states and the electric reduced transition probabilities B(E2) down arrow from gamma transition 8(+) to 6(+), 6(+) to 4(+), 4(+) to 2(+) and 2(+) to 0(+) states of neutron rich Te-122 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 (R-4/2), 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 Te-122 isotope.