A new rigid asymmetric-rotor model description of the heavy transitional nuclei

Abstract

Hexadecapole shape components have been added to the usual Davydov-Filippov asymmetricrotor model and this extended model has been applied to the nuclei 184, 186W, 186, 188, 190, 192Os, 192, 194, 196Pt, and 198, 200Hg. This model provides a much improved description of the E2 properties and in addition predicts correctly the known E4 properties. E2 properties previously thought to be anomalous (phases and magnitudes of matrix elements involving the second 2 + states) are correctly predicted.