Generalised oscillator strength for core-shell electron excitation by fast electrons based on Dirac solutions Universiteit Antwerpen
Johan Verbeeck, Sandra Van Aert, Daen Jannis, Zezhong Zhang, Ivan Lobato, Hamish Brown, Peter Nellist
Inelastic excitation as exploited in Electron Energy Loss Spectroscopy (EELS) contains a rich source of information that is revealed in the scattering process. To accurately quantify core-loss EELS, it is common practice to fit the observed spectrum with scattering cross-sections calculated using experimental parameters and a Generalized Oscillator Strength (GOS) database [1]. The GOS is computed using Fermi’s Golden Rule and orbitals of bound and excited states. Previously, the GOS was based on Hartree-Fock solutions [2], but more recently Density Functional Theory (DFT) has been used [3]. ...