Disentangling single-particle and collective signatures in 12C(p,2p)11B reaction

Abstract

We calculate kinematically fully exclusive cross sections for the ¹²C(p,2p)¹¹B reaction at $E_p=98.7$ MeV proton beam energy, leading to the low-lying states of ¹¹B. We use rigorous three-particle scattering framework extended to include simultaneously and consistently both core excitation and single-particle-like excitations. This predicts significant cross sections for the transitions to the final ${\frac{5}{2}}^{-}$ (4.45 MeV) and ${\frac{7}{2}}^{-}$ (6.74 MeV) excited states that cannot be populated through the direct single-particle excitation mechanism. We show that these two types of excitations manifest themselves with distinct and characteristic features in the scattering observables.