Shape Changes in Odd-Even Osmium Isotopes

This paper has calculated the energy levels of 185-187-189Os isotopes using projected shell model (PSM). Yrast Spectrum, nucleus rotation frequency and ratio reduced electromagnetic transition probabilities, B(E2)/B(M1) plots versus spin for understanding structure multi-quasiparticle band up to spins 47/2+, 33/2+ 31/2+ these isotopes, are plotted, respectively. It was found that in ranges 35/2+-39/2+, 31/2+-33/2+, 27/2+-29/2+, due 3-quasiparticle band-crossing, simultaneously by increasing rotational inertia nucleus, decreases greatly as an important result, ratio, electrical properties increase. Indeed, observed neutron number, deformation parameter, ε2 well, especial spins, nucleon alignment phenomenon, behavior inverse vibration mode.