Comparative Phenomenological Description of Even-Even Isotopes at Mass Region A ≈ 70

Abstract

In the present work the nuclear structure properties and the backbending phenomena of eveneven isotopes at A ≈ 70 mass region are analyzed using two simultaneous theoretical models based on a simple modified version of the collective model predictions besides an improved version of exponential model with the inclusion of pairing correlation. In general, both models successfully describe the backbending phenomena in that region. From the comparison between the predictions of the two proposed models a firm conclusion is obtained concerning the superiority of the simple improved version of the exponential model in describing the forward and downbending region of the φ-ω 2 plots.