The contribution of 2N photon absorption in 12C(γ,2N) reactions for Eγ = 150–400 MeV

Abstract The 12 C(γ,pn) and 12 C(γ,pp) reactions have been studied using tagged photons of energy E γ = 150–400 MeV. Recoil momentum distributions are compared to the results of Monte Carlo calculations based on a two-nucleon photon absorption model and two different phase space models. The 12 C(γ,pn) data at low missing energy are consistent with absorption on 1 p 2 and 1 s 1 p nucleon pairs.