Study of nuclei deformation effect on structural features for ۱۸۵,۱۸۷,۱۸۹Osisotopes

In this work the main purpose is to study the effect of nuclei deformation onstructural features in odd-mass ۱۸۵-۱۸۷-۱۸۹Os isotopes in the frame work of Projected Shell Model(PSM). The results consist of Yrast Spectrum, rotational alignment and reduced electromagnetictransition probabilities ratio, B(M۱)/B(E۲) for multi-quasiparticles bands up to spins ۴۷/۲+, ۳۳/۲+and ۳۱/۲+ has been calculated and plotted, respectively. It was found that in the states with spinranges۳۷/۲+-۳۹/۲+, ۲۹/۲+-۳۳/۲+ and ۲۵/۲+-۲۹/۲+, h۱۱/۲ proton ۳-quasiparticle bands cross i۱۳/۲neutron ۱-quasiparticle bands in the lowest energies and alignment of particles occurs in nucleusrotational orbits. It was demonstrated that quadrupole deformation changing, ε۲ are mainly affectedon rotational bands.

Keywords:

nuclei deformation parameter , Yrast Spectrum , Alignment Phenomenon , electromagnetic transition probability , Projected Shell Model.