The reaction NN → NNγ in the 1 GeV region within an effective one-boson exchange model

Within an effective one-boson exchange parametrization of the T matrix of NN interactions we calculate cross sections for the reactions pp → ppγ and pn → pnγ for proton incidence energies in the order of 1 GeV. Besides bremsstrahlung processes we consider photons from Δ decays and contributions from the η → γγ process, where the η is excited via the N1535 resonance. At beam energies above 700 MeV the Δ decay channel dominates for large photon energies, while above the η threshold the η decay photons show up only in a narrow window. The low energy photons stem from pure bremsstralung processes.