HIGH-SPIN STATES IN BOSON MODELS WITH APPLICATIONS TO ACTINIDE NUCLEI

We use the 1/N expansion formalism in a systematic study of high-spin states in the ad and sdg boson models with emphasis on spin dependence of moment of inertia and E2 transitions. The results are applied to t he high-spin states in the actinide nuclei Th-232, U-234-238, where th e need for g bosons is especially acute but until now, no realistic ca lculation existed. We find that the d-boson energy plays a crucial rol e in description of the high-spin data.