High-spin collective structures in doubly-odd Sb114

Several collective rotational bands have been established in doubly-odd Sb114 extending to high spin (35Latin small letter h with stroke) and excitation energy (18 MeV). Two pairs of strongly coupled negative-parity sequences were observed at low spin consisting of stretched quadrupole transitions and interlinking M1 dipole transitions. These bands are intepreted in terms of the [404]9/2+ orbital. A third pair of signature-partner bands was established; however, no interlinking M1 transitions were observed in this case. These bands are associated with the [550]1/2- intruder orbital, and the rotational properties are remarkably similar to those of a h11/2 intruder band in Sb113 having enhanced quadrupole deformation (20.32). The experimental results are discussed with the aid of total Routhian surface and Woods-Saxon cranking calculations.