Interchannel coupling effects on non-dipole photoionization parameters

Interchannel coupling effects involving non-dipole matrix elements on photoelectron angular distribution have been recently found to be of significant importance even at energies not so high above ionization thresholds. Studies have been reported on the angular distribution of photoelectrons from some inert gas atoms: Ne, Ar, Kr and Xe. In the present work, we report further studies on atomic xenon, and also results on atomic mercury, using the relativistic random phase approximation. Also, we report the angular distribution asymmetry parameters with the inclusion of non-dipole terms for a confined atom; @ Ca is considered as a model system for this study.