Study of Electromagnetic Transitions for Odd 185-187-189Osmium

Abstract

In this paper, Yrast spectrum and the ratio of the electromagnetic reduced transition probability, B(M1)/B(E2) has been calculated up to the spins 47/2+,33/2+ and 31/2+ for 185-187-189Os isotopes using projected shell model, respectively. In the B(M1)/B(E2) ratio were observed great drops in spins 39/2+, 33/2+ and 29/2+ that corresponds to decreases the nuclear rotation that can be the reason of band crossing of three quasi-particles with single-particle neutron band in yrast spectra. Finally, in general, it is observed that with increasing number of nucleons, the trend of increasing the ratio of electromagnetic transitions is the and for the second one only for 189Os isotope after spin 39/2+, rotation and magnetic properties of nucleus increases.

Keywords

• yrast spectrum
• reduced electromagnetic transition probability
• projected shell model