Wobbling excitations at high spins in A~160
arXiv:0710.0321 · doi:10.1016/j.physletb.2007.05.036
Abstract
We found that in 156Dy and 162Yb the lowest odd spin gamma-vibrational states transform to the wobbling excitations after the backbending, associated with the transition from axially-symmetric to nonaxial shapes. The analysis of quadrupole electric transitions determines uniquely the sign of the gamma-deformation in both nuclei after the transition point.
6 pages, 4 figures