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Free keywords:
PHOTOELECTRON ANGULAR-DISTRIBUTIONS; PHOTO-IONIZATION; DISTRIBUTION PARAMETERS; MULTIPOLE CORRECTIONS; DIPOLE APPROXIMATION; CROSS-SECTIONS; NOBLE-GASES; SUBSHELL; XENON; RETARDATION
Abstract:
The Xe 5s nondipole photoelectron parameter gamma is obtained experimentally and theoretically from threshold to similar to200 eV photon energy. Significant nondipole effects are seen even in the threshold region of this valence shell photoionization. In addition, contrary to previous understanding, clear evidence of interchannel coupling among quadrupole photoionization channels is found.