A two fluid model for nuclear rotations

A simple macroscopic model based on two-fluid liquid drop ideas is proposed for studying rotational band structure in heavy deformed doubly even nuclei. The pairing and centrifugal degrees of freedom are taken into account in a harmonic approximation. The model is then applied to study the interplay of Coriolis, centrifugal and pairing forces in some well-known backbenders and nonbackbenders and it is concluded that the observed anomalies at high spins could be the result of such an interplay. Calculations for the actinides 232Th and 240Pu are also presented. (Auth.)