Abstract
Picosecond lifetimes in were determined using the recoil distance technique with a plunger device coupled to an array of EUROBALL-cluster-detectors for the first time. The differential decay curve method in coincidence mode was employed to derive lifetimes for six states in and twelve states in The resulting values are compared with triaxial rotor plus particle calculations for and, in to the predictions of the general collective model, the interacting boson model, as well as to the symmetric and asymmetric rotor models. In the transitional quadrupole moment in the ground state band is remarkably constant before and after the backbend. With this data the two-quasiparticle negative parity band in was confirmed to be based on a configuration.
- Received 10 November 1999
DOI:https://doi.org/10.1103/PhysRevC.61.044325
©2000 American Physical Society