Improved descriptions of collective and non-collective rotations in the superheavy nucleus 256Rf

The superheavy nucleus (256)Rf, where rotational band and multi-quasiparticle isomer have been observed recently, has been investigated using total Routhian surface calculations and configuration-constrained calculations of potential energy surface, with the inclusion of beta (6) deformation. The experimental moment of inertial is well reproduced, indicating that the alignment is delayed due to the beta (6) deformation. A K (pi) = 5(-) or 8(-) state could form a two-quasiparticle isomer that is calculated to have higher fission barrier than the ground state.