The Azimuthal Distribution of Photoelectrons Produced by 0.5-Mev Polarized Photons

The azimuth angular distribution of photoelectrons ejected from lead by linearly polarized 0.51-Mev photons has been studied. The known correlation between polarization states of annihilation quanta was employed in preparation of the incident beam of polarized photons. Results indicate that for emission from the $K$ shell, the most probable direction is in the plane containing the momentum and polarization vectors of the incident photon. The asymmetry in the distribution thereby produced is slightly greater than that expected from the relativistically computed differential cross section.