The role of one-pion-exchange currents in intermediate-energy photonuclear reactions of the type A(γ,p)B is studied within a mean-field approach. Calculations are presented for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(γ,p) reaction leading to the low-lying states of ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$ including states with a predominant hole character and states with a more complicated two-hole–one-particle (2h-1p) structure. The level of agreement with the data for decay to the 2h-1p states suggests the important role of meson exchange currents in (γ,p) reactions at intermediate energies.

• Received 7 May 1992

DOI:https://doi.org/10.1103/PhysRevC.46.R829