Journal of Engineering and Applied Sciences

Year: 2007
Volume: 2
Issue: 8
Page No. 1274 - 1278

Surfaces Characterization by Ionic Bombardment

Authors : Djamel Boubetra

Abstract: The causes for the Anisotropy in the angle distribution of sprayed atoms is yet extensively unexplained. Therefore experimental investigations should be carried out to this question. The ions beam was used for comparing investigation between the distributions of back steered ions and sprayed atoms. We know that the pulverization of crystals shows an anisotropic angular distribution of pulverized atoms. The appearance of this phenomenon is initiated once Wehner spots are obtained by putting a receptor in front of the sample, which shows a correlation with the principal crystallographic axes. Another study shows, that till now the studies and works already done are not strongly founded in the sense of the correspondence of the Wehner spots and the principal axes of the crystals. Measurements are represented in many works and during the last years detailed studies on gold crystals (111). Principally the gold atoms emissions have appeared in the directions (110) and (111) for which the intensity to energy ratio of projectile ions is modified. Emissions directions are to be maintained in addition to representations and for omitted raisons directions changes have to be taken into account. After the studies of deviations in the emission directions appear during the copper crystals pulverization. The authors allocate this fact to the influence of the forces of superficial links which should generally lead to a preference of the particles emission in the normal direction to the surface. The question is who it makes that the link ratio for different crystals directions have a different response; however, it is shown that the application of an ionic beam emitter, to examine the interference of the direction emissions of the pulverized atoms with principal crystallographic axes, is necessary.

How to cite this article:

Djamel Boubetra , 2007. Surfaces Characterization by Ionic Bombardment . Journal of Engineering and Applied Sciences, 2: 1274-1278.

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