Effects of anisotropic electron-ion interactions in atomic photoelectron angular distributions

Physics – General Physics

Scientific paper

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Angular Distribution, Atomic Excitations, Ionization Cross Sections, Momentum Transfer, Particle Interactions, Photoelectrons, Angular Momentum, Anisotropy, Ion Scattering, Photoionization

Scientific paper

A summary of the angular momentum transfer formulation of the differential photoionization cross section is presented and photoionization amplitudes in LS coupling are considered. The application of the theoretical concepts and relations developed is illustrated with the aid of an example involving the calculation of the angular distribution of photoelectrons ionized from atomic sulfur according to a certain reaction. The investigation shows that anisotropic electron-ion interactions in atomic sulfur lead to measurable differences between photoelectron angular distribution asymmetry parameters corresponding to alternative ionic term levels.

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