Intensity Ratio of Kβ/Kα in Selected Elements from Mg to Cu, and the Chemical Effects of Cr Kα(1,2) Diagram Lines and Cr Kβ/Kα Intensity Ratio in Cr Compounds

[Formula: see text] X-ray lines from photon excitation were measured in selected elements from Mg to Cu using a high-resolution double-crystal X-ray spectrometer with a proportional counter, and the [Formula: see text] intensity ratio for each element was obtained, after correcting for self-absorption, detection efficiency, and crystal reflectance. This intensity ratio increases rapidly from Mg to Ca but, in the [Formula: see text] elements region, the increase becomes slower. This is related to the intensity of the [Formula: see text] line involving valence electrons. The slow increase of this ratio in the [Formula: see text] elements region is thought to be due to the correlation between [Formula: see text] and [Formula: see text] electrons. Moreover, the chemical shifts, FWHM, asymmetry indices, and [Formula: see text] intensity ratios of the Cr compounds, due to different valences, were also investigated using the same double-crystal X-ray spectrometer. The chemical effects were clearly observed, and the [Formula: see text] intensity ratio was found to be compound-dependent for Cr.