Lj. Allen et al., INNER-SHELL IONIZATION CROSS-SECTIONS AND APERTURE SIZE IN ELECTRON-ENERGY-LOSS SPECTROSCOPY, Physical review. B, Condensed matter, 56(1), 1997, pp. 9-11
Electron-energy-loss spectra have been recorded as a function of incid
ent beam orientation for K-shell ionization of C in diamond. The resul
ts show a strong orientation dependence. We show that a common approxi
mation that is often used in calculating the (total) cross section for
energy-dispersive x-ray analysis cannot be made for electron-energy-l
oss spectroscopy when the acceptance angle of the detector is sufficie
ntly small.