M-Shell Auger and Coster-Kronig Electron Spectra

Individual-term electron-transition rates for $M$-shell holes are presented in $j-j$ coupling. As the only available experimental data are best described in the mixed-coupling scheme, further calculations are performed in the mixed-coupling scheme and compared with measured term intensities in Kr and Xe. Agreement is reasonable except for the $(4s, 4p)\left({}_{}{}^1{}_{}{}^{}P_1^{}{}_{}{}^{}\right)$ transition in Kr. A tentative identification is made of the $M_{4,5}{N}_1{N}_1$ doublet in Kr and a hypothesis is advanced on the origin of the remaining doublet.