The proton structure of the superdeformed bands in the N=73 isotones 130La, 131Ce and 133Nd

A superdeformed band has been identified in the odd-odd nucleus 130La. The nine transitions seen show a behaviour consistent with the deformation epsilon -0.4 corresponding to a prolate rotor with a 3:2 axis ratio. The behaviour of the moments of inertia in the superdeformed bands in the N=73 isotones 130La, 131Ce and 133Nd is discussed in terms of a few particles in high-N shells.