Effect of the LIII Absorption Edge of Uranium on Chemical Shifts of the Lβ1 Line of Uranium in UO2+x

Abstract

The effect of intraatomic absorption of the Lβ₁ X-ray emission line of uranium was studied. To eliminate the effect of the L _{I I I} absorption edge on the chemical shift (δ) of the Lβ₁ line, the dependence of δLβ₁ on the oxygen index x in oxide systems of variable composition UO_{2 + x} was determined indirectly. It was shown that, in the absence of the effect of the L _{I I I} absorption edge, the dependence of δLβ₁ on x is ordinary and, as in the case of other hard emission lines of the uranium L series, can be described by a second-order polynomial. The abnormal dependence of δLβ₁ on x is explained.