Resonant L2MV and L3MV Auger transitions in titanium dioxide

The ratio of the two components of the L23M23V Auger transition is currentl y used to determine the stoichiometry of titanium oxides. The reduction of Ti manifests itself by a relative increase (decrease) in intensity of the A uger component lying at high (low) kinetic energy, which is assigned to an intraatomic (interatomic) transition involving Ti 3d (O 2p) valence electro ns. 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 comp onent occurs exclusively at the L-2 edge, while resonances of the other com ponent 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 LM V are identified as L3MV (including those following CK) and L2MV transition s. respectively, at variance with the previous assignment. (C) 2001 Elsevie r Science B.V. All rights reserved.