Abstract
The classical measurements of relative X-ray intensities from inner-shell transitions were accomplished with crystal spectrometers. Here we describe more recent work using solid state energy-dispersive detectors, which have much poorer resolution but offer the possibilities of very high counting statistics and very accurate determination of the experimental resolution function. Results for K X-rays agree well with theory, except in the atomic number region where the 3d shell is only partly filled. X-ray techniques can also be used in indirect but rather precise measurements of nonradiative processes. Our data for the L2–L3 Coster–Kronig vacancy transfer probability indicate a systematic departure from theory, likely due to the neglect of the final state interaction effects in the single-particle treatment when an electron is ejected during vacancy de-excitation.
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