X-Ray Kβ Emission and K Absorption Spectra of Chlorine in MnCl₂, FeCl₂, CoCl₂ and NiCl₂

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The Kβ emission and K absorption spectra of chlorine in MnCl₂, FeCl₂, CoCl₂ and NiCl₂ have been obtained with a 50 cm bent quartz crystal vacuum spectrograph. The Kβ emission bands are very wide. The shapes of the Kβ emission bands and of the K absorption bands are alike among different chlorides. The first absorption peak shifts to low energy side systematically from MnCl₂ to NiCl₂. The similarity of the observed spectra seems to suggest that the energy band structures of these chlorides are alike. Discussion is made about the first peak in the K absorption spectra on the basis of the comparison with the Cl⁻ L_2,3 absorption spectra.