Intermediate-spin states of 92Zr and a large B(E2) value between the 10+1 and 8+1 states.

This study investigated intermediate-spin states of 92Zr via the inverse reaction 9Be(86Kr,3n) 92Zr. Seven transitions were newly observed, and a lifetime was extracted for the 10+1 state by analysis of Doppler-broadened line shapes of decay γ rays. A large B(E2) value was obtained for the transition from 10+1 to 8+1, and the magnitude was comparable to that for the deformed excited configurations in 94Zr that have recently been established. A possible origin for such collectivity is discussed qualitatively based on a phenomenological deformed rotor model. Moreover, a multipletlike structure that fits into the systematics for N = 52 even- A isotones is revealed for the negative-parity yrast states. [ABSTRACT FROM AUTHOR]