Abstract
Changes which occur in peak positions, band shapes, and intensities with oxidation are presented for the five main L emission lines from the first‐series transition metals. It is shown that the L bands shift in wave‐length when going from metal to oxide, the amount of shift depending on the metal target and its state of oxidation. The dependence of the LII/LIII intensity ratio on accelerating potential, valence state, and atomic number are also presented and discussed. A flat‐crystal vacuum spectrometer with electron excitation and a thin‐window flow‐proportional counter was used to obtain the data.