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Investigation of Certain Effects Accompanying the Diffraction of Low Speed Electrons
Phys. Rev. 49, 598 – Published 15 April, 1936
DOI: https://doi.org/10.1103/PhysRev.49.598
Abstract
Influence of surface action. A test was made for the effect of density and arrangement of atoms in the surface plane on the fine structure of electron diffraction beams from a silver single crystal. This was done by observing the structure of the diffraction beams corresponding to Bragg reflections from a (210) and a (520) set of planes for two different boundary planes of the crystal ((100) and (110) planes). For the second-order beam from the (210) planes at about 200 volts, and the first-order beam from the (520) planes at about 300 volts, the changes in fine-structure characteristics due to a change in the surface atomic layer of the amount indicated are small compared to the differences in fine structure characteristics of the beams from different sets of atomic planes. Directional effects. A new type of directional effect was observed which shows a dependence of beam structure on the direction of the diffracted beam in the crystal. Further observations on deviations from the surface grating formula also indicate the presence of directional effects. Etching of the type obtained by Sproull was observed. A sensitive method of observation for determining what crystal facets are present is described.
References (12)
- M. v. Laue, Phys. Rev. 37, 53 (1931)
- Ehrenberg, Phil. Mag. 18, 878 (1934)
- H. E. Farnsworth, Phys. Rev. 40, 684 (1932)
- Phys. Rev. 43, 778 (1933)
- G. A. Morton, Phys. Rev. 44, 952 (1933)
Omitted endnote
- H. E. Farnsworth, Phys. Rev. 43, 900 (1933)
- W. T. Sproull, Phys. Rev. 42, 904 (1932) ibid.43, 516 (1933)
- H. E. Farnsworth, Phys. Rev. 43, 906 (1933) ibid.44, 417 (1933)
- G. P. Thomson, Phys. Rev. 44, 417 (1933)
- [3], p. 699
- [3], p. 699