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- W2990163314 abstract "The energy-loss distributions of ensuremath{approx}20-keV electrons transmitted through 210-575 AA{}-thick specimens of Al and ${mathrm{Al}}_{2}$${mathrm{O}}_{3}$ have been measured at zero scattering angle. Two types of ${mathrm{Al}}_{2}$${mathrm{O}}_{3}$ were used: films of the $ensuremath{gamma}$ phase and amorphous films prepared by anodization. Loss spectra were obtained for an energy-loss range of 0-160 eV, in which structure due to $L$-shell excitation in Al and ${mathrm{Al}}_{2}$${mathrm{O}}_{3}$ was observed. The positions of the absorption edges and of the peaks on the high-energy-loss side of each edge agreed well with recent x-ray absorption measurements. Slightly different structure for the two forms of ${mathrm{Al}}_{2}$${mathrm{O}}_{3}$ was found near the edge, as recently found by x-ray absorption. From the observed intensities, the values of oscillator strengths, mass-absorption coefficients, and electron-scattering cross sections have been derived for each material up to ensuremath{approx}85 eV beyond the absorption edge. The Al results are in good agreement with recent x-ray measurements and are consistent with the ${mathrm{Al}}_{2}$${mathrm{O}}_{3}$ data. The similarity in the electron energy-loss and x-ray absorption measurements is consistent with the equality of the longitudinal and transverse dielectric constants $ensuremath{epsilon}(ensuremath{omega})$ and with the expectation that in this energy-loss region $mathrm{Im}ensuremath{epsilon}=ensuremath{-}frac{mathrm{Im}1}{ensuremath{epsilon}}$ to a good approximation." @default.
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- W2990163314 date "1968-03-15" @default.
- W2990163314 modified "2023-09-27" @default.
- W2990163314 title "Excitation of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>L</mml:mi></mml:math>-Shell Electrons in Al and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Al</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=…" @default.
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- W2990163314 doi "https://doi.org/10.1103/physrev.167.592" @default.
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