High-spin states in Nb-85 were studied using the GAMMASPHERE Ge detector ar
ray and the MICROBALL charged-particle detector system. Three gamma-ray cas
cades with collective rotational characteristics were observed. One of the
bands exhibits a forking at the top, most likely reflecting the termination
of one branch into a favoured non-collective, near spherical state. The da
ta are interpreted in terms of cranked Strutinsky-type calculations. (C) 19
99 Elsevier Science B.V.