Abstract
AbstractIt is proposed that when a thin sample is mounted on the top surface of a thick single crystal foil, this foil may function as a collector aperture with regard to the radiation transmitted through the thin sample. The detailed aspects of how the crystal foil may perform as an aperture are discussed in terms of the electron equivalent of the Borrmann effect in crystals. Experiments are presented which demonstrate that the image of the thin sample is sensitive to the thickness of the single crystal foil and to its orientation with regard to the beam axis. It is concluded from the experimental results that the crystal foil does perform a collector aperture‐like function.
Published Version
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