Abstract
New effects have appeared in the field of low-energy X-ray spectrometry as a consequence of the simultaneous improvement of detector characteristics and mathematical codes for spectra processing. In the present study, X-ray spectra in the low-energy range are obtained with a Si(Li) spectrometer with a FWHM of 153 eV. The mathematical fitting code (CALGARY) includes a complex function with background, peak and tailing, which takes into account the Lorentzian shape corresponding to the X-ray natural width. The fitting residuals exhibit a systematic hump in the low-energy tail of the K β peak: this can be attributed to the KMM radiative Auger effect. This phenomenon could explain some of the discrepancies observed between the theoretical and experimental K β/K α X-ray emission probability ratios.
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