Abstract
High-spin states in have been populated in the (,3) fusion-evaporation reaction at a beam energy of 85 MeV. Two rotational bands built on the and ν intrinsic states, respectively, have been established for the first time. The newly observed ν band and previously known ν band in are discussed in terms of total Routhian surface methods and compared with the structures in the neighboring 87 isotones. The structural characters observed in provide evidence for shape coexistence of three distinct shapes: prolate, triaxial, and oblate. At higher spins, both the ν band and ν band in undergo a shape evolution with sizable alignments occurring.
- Received 7 June 2010
DOI:https://doi.org/10.1103/PhysRevC.83.014318
©2011 American Physical Society