Abstract

Line shapes of the major characteristic electron energy-loss peaks of Al, Be, and Ge, attributed to collective excitations of the valence electrons, have been measured at 20 keV primary electron energy and zero scattering angle. The primary-beam line shape has been unfolded from the observed energy-loss peak to obtain the natural-loss line shape. The results are discussed in terms of a Lorentzian line and the Drude model. The unfolded line shapes of Al and Ge are compared with optical measurements of − Im(1/∊). An expected correlation between the loss-peak halfwidth and the value of ∊₂ at the peak maximum is in fair agreement with the observed data for Al and Ge.

© 1964 Optical Society of America

Optical Constants of Metals in the Extreme Ultraviolet. II. Optical Constants of Aluminum, Magnesium, and Indium at Wavelengths Shorter than Their Critical Wavelengths*

W. R. Hunter
J. Opt. Soc. Am. 54(2) 208-212 (1964)

Analysis of Optical- and Inelastic-Electron-Scattering Data. II. Application to Al*†

C. J. Powell
J. Opt. Soc. Am. 60(1) 78-93 (1970)

Extension of Observations and Analysis of Ge i†

Curtis J. Humphreys and Kenneth L. Andrew
J. Opt. Soc. Am. 54(9) 1134-1140 (1964)

Optical Constants of Vacuum-Evaporated Silver Films*

R. H. Huebner, E. T. Arakawa, R. A. MacRae, and R. N. Hamm
J. Opt. Soc. Am. 54(12) 1434-1437 (1964)

Plasma–Interband Coupling in β′ CuZn†

Keith H. Johnson and Robert J. Esposito
J. Opt. Soc. Am. 54(4) 474-477 (1964)