ROTATIONAL BANDS AND NEUTRON ALIGNMENTS IN NEUTRON-RICH ODD-A CADMIUMISOTOPES

High-spin states in Cd-109, Cd-111 have been investigated with the rea ction Zr-96(O-18,xn) Cd-114-x at beam energies of 60 and 70 MeV. The d ecoupled yrast bands observed in both nuclei are interpreted as being built upon a low-K h11/2 -quasineutron configuration. Both structures exhibit band crossings corresponding to the rotational alignment of a pair of h11/2 quasineutrons. Two positive-parity bands built on a g7/2 -quasineutron configuration are observed in Cd-109. These exhibit a si gnature inversion in the region of the first (nuh112)2 alignment. This may be associated with some softness to triaxiality. The results are discussed in terms of the cranked shell model, total Routhian surface calculations, and the systematics of neighboring nuclei.