Partial conservation of seniority and its unexpected influence on E2 transitions in g9/2 nuclei

• Main Author: Chong Qi
• Format: Article
• Language: English
• Published: Elsevier 2017-10-01
• Series: Physics Letters B
• Online Access: http://www.sciencedirect.com/science/article/pii/S0370269317307232

There exist two uniquely defined v=4 states in systems within a j=9/2 subshell, which automatically conserve seniority and do not mix with other states. Here I show that the partial conservation of seniority plays an essential role in our understanding of the electric quadrupole transitions of the semimagic nuclei involving j=9/2 subshells, including the long-lived 8+ isomer in 94Ru. The effects of configuration mixing from neighboring subshells on the structure of those unique states are analyzed. It is shown that a sharp transition from pure seniority coupling to a significant mixture between the v=2 and v=4 states may be induced by the cross-orbital non-diagonal interaction matrix elements. Such strong mixture is essential to explain the observed E2 transition properties of N=50 isotones 96Pd and 94Ru.