Anomaly of the moment of inertia of shape transitional nuclei

作者：Gupta J B^*; Hamilton J H

来源：Physical Review C, 2011, 83(6): 064312.

DOI：10.1103/PhysRevC.83.064312

The change in the structure of the collective levels with spin angular momentum in atomic nuclei is often expressed in terms of the classical concepts of the kinematic and the dynamic moments of inertia varying with spin. For the well deformed even-even nuclei the kinematic moment of inertia increases with spin up to 10%-20%, at say I(pi) = 12(+). However, for the shape transitional nuclei, or almost spherical nuclei, it increases with spin much faster. The pitfalls of using the rotor model form of kinematic moment of inertia in such cases are pointed out here. Alternative methods of extracting the nuclear structure information are explored. The important role of the ground state deformation is illustrated. The use of the power index formula for evaluating the effective moment of inertia, free from the assumption of the rotor model, is described.

• 出版日期2011-6-13