Corrections to the X-ray fluorescence equations considering double K-photoionization

Some of the most common multi-electron transition processes are described and the effects of a double K-photoionization are analysed. Some previous experimental results are summarized, and the fact that fundamental parameters (such as absorption edge jump ratios) are changed through double ionization is shown. Finally, a correction to the equations for X-ray fluorescence intensity due to the effects of the double K-ionization is proposed by the inclusion of a step-function in the emission factor used in fundamental parameters calculation.

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