NEW 0(-146 FROM A (P,T) EXPERIMENT AND THE PARTICLE-CORE COUPLING MODEL() STATES IN SM)

The reaction Sm-148(p,t) Sm-146 was studied at E(p) = 26 MeV, Fifty-si x excited states in the final N = 84 nucleus were observed below E(exc ) = 4.2 MeV and their angular distributions were measured at 8 angles, Spin and parity assignments are made for 37 of them, based on the det ermination of the transferred angular momentum L. Ten excited J(pi) = 0(+) states were identified, The emerging excitation energies of the J (pi) = 0(+) states and the monopole strength distribution in Sm-146 ar e compared with those observed in nearby nuclei and with results of ca lculations done in the framework of the Particle-Core Coupling Model. The main features of the experimental results are interpreted using a superposition of two types of configurations: two-particle states coup led to the collective excitations of the N = 82 core and two holes cou pled to the collective excitations of the N = 86 core. Calculations sh ow also that two-phononxtwo-particle configurations are spread over ma ny states and their identification becomes difficult.