THE LOCALIZATION OF UNOCCUPIED 3D STATES IN OXIDIZED SC

Inverse photoemission and 3p-3d giant resonance excitation in electron energy loss spectroscopy in oxidized Sc are related to 2p --> 3d x-ra y absorption in Sc2O3. The observations are shown to be consistent wit h 3d states being localized in both the presence and the absence of a core hole. Inverse photoemission reveals 3d crystal field splitting co mparable to that found in 2p --> 3d excitations, while 3p-3d excitatio ns show in addition strong hole-electron exchange coupling.