12C( p,α*)9B reaction in the finite range microscopic distorted-wave Born-approximation formalism

The differential cross sections for the 12C( p,α*)9B(g.s.) and 12C( p,α)9B(g.s.) reactions were measured at forward angles at the proton energy of 45.2 MeV. The outgoing α* particle (20.1 MeV, 0+, T=0) was detected by measuring in coincidence the proton and triton breakup products. Finite range distorted-wave Born approximation and final state interaction calculations were employed in describing the reaction with the unbound emitted particle. The form factor for the distorted-wave Born-approximation analysis was calculated in a microscopic model employing Woods-Saxon wave functions for the three individual transferred nucleons. Microscopic wave functions for the α and α* particles, due to Hackenbroich et al., were used. Comparisons were also made with distorted-wave Born-approximation calculations using cluster transfer form factors. Relative normalizations between the ( p,α*) and the corresponding ( p,α) angular distribution were found to be in good agreement with theoretical prediction from the microscopic model