Levels in the odd-odd nucleus Nb-100 situated at the edge of a region of es
pecially fast shape transitions have been calculated in the framework of th
e interacting boson fermion fermion model. Levels observed in decay studies
can be interpreted in a spherical basis. Low-lying I-pi = 8(+) and 10(-) s
tates are predicted. Their relationship with the unplaced levels populated
with a 12 mu s delay after fission is discussed.