Possible Triaxial Superdeformation In ~(174)Hf

摘要

Three, possibly four, regularly spaced rotational bands with large dynamical moments of inertia, which are consistent with known superdeformed bands in the Lu/Hf region, have been identified in ~(174)Hf. The states were populated in the ~(130)Te(~(48)Ca,4n) reaction at a beam energy of 194 MeV. The Gammasphere array detected the emitted gamma radiation. Ultimate cranker calculations predict substantial triaxial deformation (γ≈ +-17°) for highly deformed ~(174)Hf structures. However, ~(174)Hf is eight neutrons away from the previously established N = 94 triaxial superdeformed shell gap. Shell gaps at N = 100 and 106 with γ ≥ 15°are observed when ε_2 ≈ 0.45, which may be responsible for the predicted TSD minima in ~(174)Hf.