Rotational structures in [sup 106]Sn: A new form of band termination

Two weakly populated rotational bands have been established in [sup 106]Sn from the [sup 54]Fe ([sup 58]Ni,[alpha]2[ital p]) reaction at 243 MeV. One of the bands shows evidence of termination. The result is consistent with cranked Nilsson model calculations, which predict band terminations with a smooth and gradual shape change from a prolate collective to an oblate noncollective structure.