Study of exp 24 Mg( Exp 18 O, exp 16 O) exp 26 Mg Reaction at E sub 180 =50MeV Including Scattering in Entrance and Exit Channel

摘要

Cross section angular distributions of exp 24 Mg( exp 18 O, exp 16 O) exp 26 Mg reaction at 50 MeV incident energy leading to the first four excited states in exp 26 Mg and the elastic and inelastic scattering for exp 18 O + exp 24 Mg at 50 MeV and exp 16 O + exp 26 Mg at 56 MeV have been measured in order to investigate the reaction mechanism of the two-nucleon transfer reaction including the analysis of incident and exit channels. The measured angular distributions were analyzed in the framework of the EFR-DWBA. Two neutron transfer amplitudes were determined using the 2s-1d shell model amplitudes calculated by Chung and Wildenthal. The large experimental cross section in contrast to the smallness of the direct transfer amplitude and the peculiar shape of the measured angular distribution of the lowest 2 sub 1+ state suggests that this level is mainly excited by two-step processes. It is shown that a CCBA calculation describes successfully the angular distributions of the ground state and the 2 sub 1+ state in exp 26 Mg. (Atomindex citation 12:577041)