Anomalous Refraction Effect in Electron Diffraction


THE multiple fine structure of the electron diffraction Debye–Scherrer rings due to the refraction of electron waves at surfaces of crystal particles having a well-defined crystal shape, such as magnesium oxide and cadmium oxide smokes of cubic habit, were first noted by Sturkey and Frevel1 and Hillier and Baker2, and studied in more detail by Cowley and Rees3 and one of us4. But the crystallites in the powder samples used in these investigations have arbitrary orientations with respect to the electron beam, so that it is difficult to speak of the refraction effect with a definite geometrical relation between crystal and beam.

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  1. 1

    Sturkey, L., and Frevel, L. K., Phys. Rev., 68, 56 (1945).

  2. 2

    Hillier, J., and Baker, R. F., Phys. Rev., 68, 98 (1945).

  3. 3

    Cowley, J. M., and Rees, A. L. G., Nature, 158, 550 (1946); Proc. Phys. Soc., 59, 287 (1947).

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    Honjo, G., J. Phys. Soc. Japan, 2, 133 (1947).

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    Miyake, S., Proc. Phys. Math. Soc. Japan, 22, 666 (1940).

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    Bethe, H., Ann. Phys., 87, 55 (1928).

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    Sturkey, L., Phys. Rev., 73, 183 (1948).

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MIYAKE, S., HONJO, G. Anomalous Refraction Effect in Electron Diffraction. Nature 165, 644–645 (1950) doi:10.1038/165644a0

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