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The scattering half-thickness for electrons has been experimentally determined to be {≈} 0.25 {μ}g/cm² ({≈} 13 {} carbon) for 1169-eV electrons and {≈} 0.21 {μ}g/cm² ({≈} 10 {} carbon) for 920-eV electrons. The corresponding mass-scattering coefficients are 2.75 ±{} 0.19 and 3.32±{}0.37 cm²/{μ}g. Other useful and related attenuation parameters are defined and calculated. These results were obtained from measurements of the attenuation by thin carbon films (5-60 {}) of monoenergetic photoelectrons originating from gold substrates irradiated with Mg K_α x rays, and also from measurements of the concomitant increase in carbon photoelectron intensity. Scattering of electrons in the energy range about 1 keV is greater than has generally been indicated.
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Steinhardt et al. (1972) studied this question.
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