The KαL¹/KαL⁰ intensity ratio of fluorine is measured in five fluorine compounds with a crystal spectrometer. An anomalous reduction of this intensity ratio was observed in KF and SrF₂, which is attributed to resonance electron transfer from the metal ion to the spectator vacancy in the fluorine ion. KαL²/KαL⁰ intensity ratio of fluorine is also measured. The measured relative intensities are compared with the theoretical estimates of Aberg.

K X-ray emission spectra of Ti, V, Cr and Mn generated by photon excitation have been studied with a crystal spectrometer. The measured energy shifts of K$_{\alpha}$ satellite relative to the diagram line are compared with values obtained by electron excitation and with different theoretical estimates. The present experimental values of K$_{\alpha}$L¹/K$_{\alpha}$L⁰ relative intensities are compared with values obtained by electron excitation.