An empirical semiclassical model has been proposed to investigate the nature of dynamic moment of inertia of the superdeformed (SD) bands in nuclei of mass 150 region. The model incorporates an additional frequency dependent distortion to the dynamic moment-of-inertia term akin to a vibrational component to explain the extreme spin structure of these bands. Using this model three distinct natures of the dynamic moment-of-inertia, have been identified for the SD band structure for the mass 150 region. This study establishes the role of the vibrational mode in the extreme high spin rotational structure of the atomic nuclei.

• Received 25 August 2016

DOI:https://doi.org/10.1103/PhysRevC.94.064329