Abstract
The quadrupole moments () of the highly deformed, second minimum bands in and have been extracted from mean lifetime measurements using the Doppler shift attenuation method. The reactions S,2p2nNd at 152 MeV and S,3nNd at 145 MeV were used. A standard centroid shift analysis was carried out in both cases, which gave values of =(6.0±0.7)e b and (4.0±0.5)e b for and , respectively, corresponding to axial prolate deformations of ≃0.33 and ≃0.22. A line-shape analysis was also carried out for to check against the possible effect of sidefeeding. The result was =(6.7+0.7)e b, with sightly slower sidefeeding times corresponding to ¯≃5.3e b. The results are in good agreement with the predictions of total Routhian surface calculations, and are discussed in the context of other highly deformed bands in the A=130–140 mass region.
- Received 3 September 1991
DOI:https://doi.org/10.1103/PhysRevC.45.2683
©1992 American Physical Society