Fluorescence yields for multiply ionized ions

Theoretical concepts of fluorescence yields for a line, a multiplet and an electron configuration are presented. Calculational procedures are discussed. A critical examination of the previous analyses relevant to high-resolution x-ray spectral measurements is presented. It is suggested that one should compare directly the calculated x-ray relative intensities with the measurements. Such an analysis requires a model of multiple ionization and theoretical fluorescence yields. Theoretical x-ray spectra with different energy resolution are presented to illustrate the suggested procedure