Abstract
Excited states in the odd-odd neutron deficient nucleus (, ) have been studied for the first time. The gamma spectroscopy analysis using coincidences revealed a strongly coupled rotational structure that was established up to large angular momentum states. The rotational band was assigned to the configuration based on its rotational and electromagnetic properties. The data are interpreted within the framework of total Routhian surface calculations, which suggests an axially symmetric shape with a -soft minimum at and . The crossing of the signature partners observed in heavier () odd-odd nuclides in this mass region is found to be absent at . This might be correlated with a change in -band structure above the paired band crossing at these neutron numbers.
- Received 11 October 2011
DOI:https://doi.org/10.1103/PhysRevC.84.064312
©2011 American Physical Society