The validity of the distorted-wave impulse approximation treatment has been investigated for ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(p,2p${)}^{11}$B knockout at an incident energy of 200 MeV for coplanar geometries which are very different from those at which quasifree knockout is usually studied. Good agreement in shape has been found between the calculated and measured energy-sharing distributions over a wide range of kinematic conditions. Except at very forward symmetric angles, the distorted-wave impulse approximation treatment was found to be insensitive to the choice of the initial- or final-energy prescriptions for the two-body scattering approximation. An average spectroscopic factor of 1.1±0.3 was extracted.

• Received 19 June 1989

DOI:https://doi.org/10.1103/PhysRevC.40.1950