Abstract
The energies, intensities and the angular anisotropy coefficients of Auger electrons have been calculated for the KLL Auger spectra of free oxygen atoms. For open shell atoms an anisotropic Auger emission can appear even for the KLL Auger lines. To study the oxygen KLL Auger spectra we calculated the Auger matrix elements within the multiconfigurational Dirac - Fock model using the intermediate coupling scheme for representing the atomic states. The energies, intensities and angular distribution parameters are discussed together with theoretical predictions in the LS coupling and are compared to recent experimental and theoretical results. We also discuss the influence of overlapping initial fine structure states on the Auger dynamics. Large anisotropy coefficients in conjunction with large intensities are predicted for a coherently excited initial and unresolved final state fine structure. It is suggested that the angular distribution of the Auger line is measured.
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Schedule a callMore From: Journal of Physics B: Atomic, Molecular and Optical Physics
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