Multiple ionization and X-ray line emission resulting from inner-shell electron ionization

Physics – General Physics

Scientific paper

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Emission Spectra, Ionization Cross Sections, Line Spectra, Radiative Recombination, X Ray Spectra, Auger Effect, Electron Transitions, Fluorescence, Iron

Scientific paper

An application of the previously developed model for determining the probabilities P (alpha sub N, N sub A) of emitting N sub A Auger electrons and the probabilities P (alpha sub N, Beta sub N - gamma sub N) of the radiative transitions beta sub N - gamma sub N during the cascade decay process following the creation of an arbitrary distribution alpha sub N of N vacancies among the nl subshells of an atomic system is reported. Particular emphasis has been given to the effects of single inner-shell vacancies, which may be created by energetic charged-particle collisions or by X-ray photoionization. Results of calculations are presented for single inner-shell electron ionization of iron ions from the neutral atom through the heliumlike ionization state, taking into account all of the Auger, Coster-Kronig, and electric dipole radiative transitions which can occur during the inner-shell vacancy-cascade process. The importance of the multiple ionization which results from Auger electron emission and of the X-ray satellite line radiation which is produced by the radiative decay of multiple-vacancy states is investigated for inner-shell electron ionization by electron collisions and by photon impacts.

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