Abstract
Characteristic energy-loss spectra of 20-keV electrons in amorphous and polycrystalline have been measured in transmission at zero scattering angle. The dominant loss peak, due to plasmon excitation, occurred at 22.6±0.2 and 24.3±0.2 eV for the amorphous and polycrystalline films, respectively. Lower-lying weaker losses were observed at about 8.7 and 13.5 eV in both films, with an additional loss at 17.7 eV in the polycrystalline film. Using a previously developed technique, values of and electron-energy-loss oscillator strength were derived from the loss spectra. The results for anodized are in excellent agreement with existing optical measurements.
- Received 9 August 1967
DOI:https://doi.org/10.1103/PhysRev.165.1067
©1968 American Physical Society