Abstract
We derive explicit formulae for angular asymmetries and longitudinal and transverse polarizations of nucleons emitted from nuclei in the (γ, N) reaction, corresponding to linearly or circularly polarized as well as unpolarized incident photons. The reaction is assumed to proceed in two stages, namely, by photo-excitation of a single nuclear level and its subsequent decay via nucleon emission. Our expressions are given in terms of the nuclear transverse multipole form factors for the excitation and of the reduced matrix elements corresponding to the decay. The results are illustrated by obtaining nucleon angular distributions and transverse polarizations following photo-excitation of the giant dipole resonance in 16O, using Gillet's model and R-matrix theory. The comparison of these results with experiment is satisfactory.
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