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.
