3s2p inelastic x-ray scattering of CaF 2

Abstract

In this paper the 3s2p inelastic x-ray scattering (IXS) cross sections of CaF 2 are analyzed using a ligand-field multiplet approach. All dipole matrix elements necessary for the IXS cross section are calculated and it is shown that interference effects are not negligible. The important possibility to map out a specific character of the 2p^5 3d^1 intermediate states is explained. The experimental results of Rubensson et al. are reproduced with the ligand field multiplet model and the Kramers-Heisenberg equation of inelastic x-ray scattering. The values found for the ligand-field splitting (20.91 eV) and the 3s3d exchange splitting (1.2 eV) differ from the results fitted to experiment.