Triaxial Strongly Deformed Bands in ~(164)Hf and the Effect of Elevated Yrast Line

摘要

Two exotic rotational bands have been identified in ~(164)Hf and linked to known states. They are interpreted as being associated with the calculated triaxial strongly deformed (TSD) potential energy minimum. The bands are substantially stronger and are located at much lower spins than the previously discovered TSD bands in ~(168)Hf. In addition to the proton and neutron shell gaps at large trixiality, it was proposed that the relative excitation energy of TSD bands above the yrast line plays an important role in the population of TSD bands.