Effects of Chemical Composition on X-Ray Lines

The influence of chemical combination with oxygen on the width, index of asymmetry and separation and ratio of peak intensities of the alpha-doublet of the elements Ti, Cr, Mn, Fe and Zn of the $K$-series emission lines has been studied with a double crystal spectrometer. The widths of the alpha-lines were increased 3 to 35 percent and the beta-lines were increased 4 to 30 percent except in two cases, namely that of the $K{\alpha }_1$-line of Ti${\mathrm{O}}_2$, whose width decreased 3 percent, and that of the beta-lines of the oxides of Mn, whose width remained the same as that of the pure metal. No effect of chemical composition on the widths of the gamma-lines was observed. The ${\alpha }_1\to {\alpha }_2$ separations were unaffected by chemical composition. The asymmetries of all the lines were unaffected with the exceptions of the alpha-lines of Ti${\mathrm{O}}_2$, and the $K{\alpha }_1$- and the beta-lines of MnO and ${\mathrm{Mn}}_3$ ${\mathrm{O}}_4$. The ratios of peak intensities of the alpha-lines were affected by changes of width caused by chemical composition such that the ratio of areas remained 2: 1.