Sun, Y (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China.
Inspired by the recent experimental identification of the new isomer with a half-life of (620 +/- 150) ns in the very neutron-rich nucleus Zr-108, we apply the projected shell model with axially-deformed bases to discuss possible shapes near the ground state and the nature of the isomer. The structure of the new isomer is investigated by restricting the calculation to prolate and oblate shapes. It is shown that the isomer can be understood as a K-isomer. Meanwhile, the calculation predicts more low-lying high-K configurations, which may be confirmed by future experiments.
National. Natural Science Foundation of China [11305059, 11275067, 11135005, 11275068, 11475062]
; National Program on Key Basic Research Project [2013CB834401]
; Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [Y5KF141CJ1]