Current image diffraction patterns of metal single-crystal surfaces

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Abstract
Diffraction patterns in the specimen current images at low electron beam energies of the (100), (110), and (111) surfaces of aluminum and the (100) surface of copper are presented along with theoretical computations for the aluminum (100) surface. With the use of computer imaging techniques, a two-dimensional diffraction pattern for the (100) face of aluminum is generated based on a dynamical calculation of the reflectivity, as a function of the polar and azimuthal angles of the incident electron beam, due to the elastically backscattered electrons. This pattern reproduces the overall experimental features leading to the conclusion that the diffraction patterns are due to the elastically backscattered electrons.