Microscopic study of electromagnetic properties and band spectra of neutron deficient ^133,135,137Sm

Abstract

A microscopic high spin study of neutron deficient and normally deformed 133,135,137Sm has been carried out in projected shell model framework. The theoretical results have been obtained for the spins, parities and energy values of yrast and excited bands. Besides this, the band spectra, band head energies, moment of inertia and electromagnetic transition strengths are also predicted in these isotopes. The calculations successfully give a deeper understanding of the mechanism of the formation of yrast and excited bands from the single and multi-quasi particle configurations. The results on moment of inertia predict an alignment of a pair of protons in the proton (1h 11/2)2 orbitals in the yrast ground state bands of 133-137Sm due to the crossing of one quasiparticle bands by multi-quasiparticle bands at higher spins. The discussion in the present work is based on the deformed single particle scheme. Any future experimental confirmation or refutation of our predictions will be a valuable information which can help to understand the deformed single particle structure in these odd mass neutron deficient 133-137Sm.

Investigation of Alignment Effects of Neutron and Proton Pairs in High Spin States of Band Crossing for <sup>159,160</sup>Sm Isotopes Using Projected Shell Model (PSM)

“…Using this model has other advantages such as its simple computational method compared to similar methods and its relatively better results [2,3]. In 1995, the Nilsson model was developed by Hara and San to describe the deformation characteristics of the axial symmetry of deformed nuclei, and a notion of this new model was recognized as the projected shell model [18]. A couple of years later, a code based on the projected shell model was written for Windows-operated computers, using Fortran programming language.…”