13C(11B, 12C)12B REACTION AT 45 MeV, 12C + 12B INTERACTION VERSUS THAT OF 12C + 10,11B.

Complete angular distributions including both forward and backward angles are reported for the reaction ¹³C(¹¹B, ¹²C)¹²B at Elab(¹¹B) = 45 MeV leading to the ground and excited states of ¹²C and ¹²B. This reaction explores the interplay of proton and neutron transfers as well of those for larger clusters. The experimental data were analyzed within the coupled-reaction-channels method (CRC) that included the ¹³C+¹¹B elastic scattering channel as well as channels for one- and two-step transfers of nucleons in the coupling scheme. The necessary ¹³C+¹¹B optical potential parameters were obtained from previous work, while those for ¹²C + ¹²B were deduced from fitting the calculations to the ¹³C(¹¹B, ¹²C)¹²B reaction data. Needed spectroscopic amplitudes of transferred nucleons and clusters were calculated within the translational-invariant shell model (TISM). The data are well-described by proton transfers while contributions from neutron transfer are only important at the largest angles. New global optical potentials for the elastic scattering of ^8,10,11B isotopes were tested and found to describe the forward angles reaction data but not those for the middle and larger angles even when the ground-state reorientation of ¹¹B in the entrance channel is included. [ABSTRACT FROM AUTHOR]