Abstract
The isotopes of dysprosium and holmium have been investigated using the Eurogam II -ray spectrometer. A new collective rotational band has been observed in and the previously observed band in has been extended to much higher spin. Comparing these bands and similar bands in with the collective bands in the isotopes of Dy, Ho, and Er suggests that the first proton crossing is not observed at This observation has led to the reinterpretation of four of the previously observed bands in It is proposed that the low deformation collective bands in and are associated with a triaxial shape with large positive gamma and that they have a similar origin to the recently observed triaxial superdeformed bands in
- Received 22 November 2000
DOI:https://doi.org/10.1103/PhysRevC.66.044305
©2002 American Physical Society