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- W68235854 abstract "The interaction of fast atoms and ions with a clean and flat surface of a metal under a grazing angle of incidence is characterized by two vastly different regimes with respect to the motion parallel and normal to the surface plane. In Fig.l we give a simple sketch of the geometry of grazing surface collisions, where some relevant polar and azimuthal angles are indicated. The motion parallel to the surface proceeds with about the initial energy of the projectile E, whereas the energy for the normal motion is given by Ey= E sin2Φ (Φ = grazing angle of incidence or emergence). For Φ = 1° — a typical angle of incidence in our studies — we have Ey= 3*10-4 E, so that for beams with keV-energies the normal motion proceeds with energies of about eV. This feature of grazing surface collisions has a number of consequences with respect to the interaction of the projectiles with the surface. Due to the low normal energies Ey the projectiles cannot overcome the repulsive potentials formed by the atoms of the topmost layer of the surface and will not penetrate into the bulk of the solid (for a perfect surface!). It is evident that the emission of electrons during ion impact with the solid is affected by the specific features of the grazing incidence collision geometry. We will discuss here some examples of our recent work in this respect." @default.
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- W68235854 date "1993-01-01" @default.
- W68235854 modified "2023-09-28" @default.
- W68235854 title "Electron Emission Phenomena in Grazing Collisions of Fast Ions with Surfaces" @default.
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- W68235854 doi "https://doi.org/10.1007/978-1-4615-2840-1_18" @default.
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