Note on the Effect of Chemical Combination on the Structure of the K Absorption Limit

The structure of the $K$ absorption limits of some chemical compounds was examined with the double x-ray spectrometer. This instrument has been previously described. The $K$ absorption limits of the elements Ag, Mo and Cu and the compounds ${\mathrm{Ag}}_2$S, ${\mathrm{Ag}}_2$O, also Mo${\mathrm{O}}_3$, Mo${\mathrm{S}}_2$ and ${\mathrm{Mo}}_2$ ${\mathrm{O}}_3$ were examined for increase in width or fine structure. The width for the pure element decreases with increasing atomic number. The general effect of the chemical action was to broaden the absorption limit, but there was little displacement. In one case, ${\mathrm{M}}_2$ ${\mathrm{O}}_3$, there was evidence of fine structure. The silver salts appeared to be considerably reduced by the x-rays.