Sandzelius, M.Cederwall, B.Ganioglu, E.Thomson, J.Andgren, K.Bianco, L.Johnson, A.2019-08-012019-08-0120090556-2813https://dx.doi.org/10.1103/PhysRevC.80.054316https://hdl.handle.net/11480/5001Excited states in Ta-163 have been identified for the first time using the Cd-106(Ni-60,3p) fusion evaporation reaction. gamma rays were detected using the JUROGAM gamma-ray spectrometer and recoil discrimination was achieved using the recoil ion transport unit (RITU) gas-filled separator in conjunction with the GREAT spectrometer situated at the focal plane of the RITU. The yrast states are assigned to a strongly coupled rotational band based on a pi h(11/2) configuration. This structure exhibits large signature splitting at low spins that disappears after the paired band crossing because of the alignment of a pair of i(13/2) neutrons. This effect is ascribed to triaxial shape changes induced by the core-polarizing properties of the deformation-aligned h(11/2) proton and the rotation-aligned i(13/2) neutrons. Two additional strongly coupled band structures have been established and are discussed in terms of octupole-vibrational and two-quasiparticle excitations built on the yrast structure. The experimental results are compared with predictions from cranked-shell-model and total-Routhian-surface calculations.eninfo:eu-repo/semantics/closedAccessArticle80510.1103/PhysRevC.80.0543162-s2.0-71049180361N/AWOS:000272313000030Q1