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Diffraction of Low-Energy Ion-Induced Secondary Electrons Emitted in the Forward Direction from a Solid Foil

1986; American Physical Society; Volume: 57; Issue: 13 Linguagem: Inglês

10.1103/physrevlett.57.1584

1092-0145

A. R. Goñi, S. Suárez, P. R. Focke, G. Bernardi, W. Meckbach,

X-ray Spectroscopy and Fluorescence Analysis

By the measurement of doubly differential distributions of electrons emitted downstream when 170-keV protons pass through thin carbon foils, besides the convoy electron peak and the characteristic ridge, centered in the beam direction and found also in gas targets, a lateral structure is observed at larger angles. The location of this structure can be uniquely and quantitatively attributed to electron diffraction in the three-dimensional reticule of the polycrystalline foil. Electrons in the central ridge are found to diffract, while the convoy electrons do not.