Abstract
The ground state rotational bands of the nuclei , , and have been extended into the angular momentum region where rotation alignment of particles is normally expected. By measuring the moments of inertia of these bands we have observed a consistent increase in the rotational frequency required to start pair breaking, when compared to neighboring nuclei. shows the most marked effect. It has been widely suggested that these “delayed alignments” arise from -pairing correlations. However, alignment frequencies are very sensitive to shape degrees of freedom and normal pairing, so the new experimental observations are still open to interpretation.
- Received 22 March 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.132501
©2001 American Physical Society