Double-electron excitations in L3-edge X-ray absorption spectra of Actinides

Multielectron excitations are well known in absorption spectra of noble gases. There, the absorption signal is not affected from neighbored atoms that cause the extended X-ray absorption fine structure (EXAFS). Although EXAFS oscillations often cover these features, they have been revealed also in the spectra of liquids and solids. For the first time, this effect has been observed for actinides.