Studying 4d–4f transitions in Er using resonant inelastic scattering

Abstract

The 4d–4f giant resonance in Er 2O 3 is studied using resonant inelastic X-ray scattering, and the results are interpreted within a purely atomic framework. The soft X-ray emission and absorption spectra are measured using tunable synchrotron radiation. The results show significant valency mixing, evidenced by Er 3+, Er 2+, and Er 4+ components to the soft X-ray absorption and resonant emission data. We find strong inelastic resonant scattering and the energy losses are assigned to 4f inner-shell excitations. The results also show resonant mixing of intermediate states that are separated over an energy range of at least 9.3 eV.