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Resonant L2MV and L3MV Auger transitions in titanium dioxide

By J. JUPILLE, D. CHANDESRIS, J. DANGER, P. LE FEVRE, H. MAGNAN, S. BOURGEOIS, R. GOTTER and A. MORGANTE

Abstract

he ratio of the two components of the L23M23V Auger transition is currently used to determine the stoichiometry of titanium oxides. The reduction of Ti manifests itself by a relative increase (decrease) in intensity of the Auger component lying at high (low) kinetic energy, which is assigned to an intraatomic (interatomic) transition involving Ti 3d (O 2p) valence electrons. The LMV Auger transition is herein revisited via its resonant behaviour at the Ti L-23 absorption edge in TiO2. Resonances of the high energy component occurs exclusively at the L-2 edge, while resonances of the other component are seen at the L-3 edge, but also at the L-2 edge. The latter being attributed to a L2L3V Coster-Kronig transition, the low- and high-lying LMV are identified as L3MV (including those following CK) and L2MV transitions. respectively, at variance with the previous assignment

Topics: SURFACE-DEFECTS, titanium dioxide, X-RAY-ABSORPTION
Year: 2001
DOI identifier: 10.1016/S0039-6028(00)01038-4
OAI identifier: oai:arts.units.it:11368/1697078
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