PROTON AND NEUTRON EXCITATIONS IN SUPERDEFORMED TB-150

Two new superdeformed (SD) bands have been observed in Tb-150 using th e reaction P-31 + Sn-124 and the GAMMASPHERE detector array. These new bands are interpreted as being excited SD configurations involving a proton and a neutron particle-hole excitation, respectively. The confi gurations are discussed in terms of the occupancy of high-N intruder o rbitals. These data are used to provide information on (i) the contrib ution to the dynamic moments of inertia due to the occupation of speci fic orbitals, (ii) the deformation driving effects of the particle-hol e states, and (iii) the consequences of these effects on pairing and b and crossings.