Evidence of Partial Seniority Conservation in the πg9 /2 Shell for the N=50 Isotones

Abstract

The reduced transition probabilities for the 41+→21+ and 21+→01+ transitions in Mo92 and Ru94 and for the 41+→21+ and 61+→41+ transitions in Zr90 have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the f5/2, p3/2, p1/2, and g9/2 proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the N=50 g9/2 orbital to be understood. The conclusion is that seniority is largely conserved in the first πg9/2 orbital.