Mechanisms of the 12C(11B,15N)8Be reaction

Angular distributions of the 12C(11B, 15N)8Be reaction were measured at the energy Elab(11B) = 49 MeV for the transitions to the ground and 2.94 MeV (2+) excited state of 8Be and to the ground and 5.270 MeV (5/2+) + 5.299 MeV (1/2+), 6.324 MeV (3/2-), 7.155 MeV (5/2+) + 7.301 MeV (3/2+), 7.567 MeV (7/2+) excited states of 15N. The data were analyzed by the coupled-reaction-channel method. The elastic, inelastic scattering and one- and two-step transfers were included into the coupling scheme. The data of the 12C(11B, 8Be)15N reaction at Ec.m. = 9.4 - 17.8 MeV known from the literature, were also included in the analysis. It was found that in the 12C(11B, 15N)8Be reaction the α- and t-cluster transfers dominate at θc.m. < 90° and θc.m. > 90°, respectively. The optical model parameters for the 15N + 8Be interaction and their energy dependence were deduced.