Inner-Shell Excitation Spectroscopy of Fused-Ring Aromatic Molecules by Electron Energy Loss and X-ray Raman Techniques

Oscillator strengths for C 1s excitation spectra of gaseous benzene, naphthalene, anthracene, phenanthracene, triphenylene, pyrene, and 1,2-benzanthracene have been derived from inner-shell electron energy loss spectroscopy recorded under scattering conditions where electric dipole transitions dominate (2.5 keV residual energy, θ ≤ 2° corresponding to a product of momentum transfer and C 1s orbital size (qr) of 0.08). These spectra are …