The photon asymmetry (Sigma) of the C-12((gamma)over-right-arrow,pn) reacti
on has been measured using linearly polarised tagged photons at the Mainz m
icrotron MAMI for E-gamma = 180-340 MeV. The data have been analysed in sep
arate missing energy (E-m) regions corresponding to the ejection of nucleon
s from (lp)(2) and (lp)(ls) shells. The measured Sigma values for both E-m
regions are smaller in magnitude than corresponding H-2 data, but the (lp)(
2) results have a similar E-gamma dependence. Calculations of direct two-nu
cleon emission overestimate the magnitude of Sigma at all photon energies.
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