News Academy of Engineering Sciences A.M. Prokhorov Annotation << Back The x-ray spectral study of the о(f)2s, 2р electronic state density in tho2 and thf4 A.Yu. Teterin M.V. Ryzhkov Y.A. Teterin E.Z. Kurmaev K.I. Maslakov K.E. Ivanov V.V. Fedorenko L.V. Elohina The structure of the x-ray photoelectron, x-ray O(F)Kα-emission spectra from ThO2 and ThF4 as well as Auger OKLL spectra from ThO2 was studied. The spectral structure was analyzed using the relativistic Xα discrete variation calculations of the electronic structure of the ThO8 12-(D4h) and ThF8 4-(C2) clusters reflecting thorium close environment in solid ThO2 and ThF4. As a result it was theoretically found and experimentally confirmed that during the chemical bond formation the filled O(F)2p electronic states are distributed mainly in the binding energy range of the outer valence molecular orbitals from 0 to 13 eV, while the filled O(F)2s electronic states – in the binding energy range of the inner valence molecular orbitals from 13 to 35 eV. It was shown that the Auger OKLL spectral structure from ThO2 characterizes not only the O2p electronic state density distribution, but also the O2s electronic state density distribution. It agrees withy the suggestion on the participation of the O2s electrons in formation of the inner valence molecular orbitals in the binding energy range of 13 - 35 eV. The relative Auger OKL2-3L2-3 peak intensity was shown to reflect quantitatively the O2p electronic state density on the oxygen ion in ThO2. Ключевые слова: x-ray photoelectron, emission, Auger- spectroscopy, inner (IVMO) and outer (OVMO) valence molecular orbitals. Contacts: E-mail: antonxray@yandex.ru Pp. 73-79.