Experimental evidence for coexisting structures in I-125 - art. no. 014313

Properties of the collective bands in I-125, populated in Sb-123(alpha ,2n gamma) I-125 reaction at E = 30 MeV, have been studied from gamma -ray angu lar distributions and excitation functions. Spins and parities are inferred for several states. New E2/M1 mixing ratios are deduced for five transitio ns. A three-quasiparticle collective band is proposed on the basis of these and earlier results. The shapes of the ground state yrast band and the g(9 /2) band are discussed, providing evidence for the coexistence of prolate a nd oblate collective states.