Rotational states have been identified in Sb51111 for the first time. Three decoupled (I=2) bands extending to over 1 MeV in rotational frequency have been observed. At the highest frequencies, the scrJ(2) moments of inertia for these three bands are seen to decrease steadily to unexpectedly low values; this is interpreted as evidence for a novel form of band termination. One of these bands is interpreted as being based on the h11/2 orbital coupled to a deformed [(g9/2)-2(g7/2)]0+ state of the Sn50110 core. The interaction strength for the alignment of a pair of h11/2 neutrons has been extracted and compared with calculations. Two possible quasiparticle configurations are discussed for the other decoupled bands. Two strongly coupled (I=1) bands have been identified and both shown to involve the [(g9/2)-1-(g7/2)2] configuration. A large number of spherical states have also been observed, which can be explained on the basis of valence protons coupled to spherical states in the Sn110 core.
ASJC Scopus subject areas
- Nuclear and High Energy Physics