By PRIGOGINE, RICE
The Advances in Chemical Physics sequence presents the chemical physics and actual chemistry fields with a discussion board for severe, authoritative reviews of advances in each quarter of the self-discipline. full of state-of-the-art study stated in a cohesive demeanour no longer came upon somewhere else within the literature, every one quantity of the Advances in Chemical Physics sequence serves because the excellent complement to any complicated graduate type dedicated to the learn of chemical physics.
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Extra info for Advances in Chemical Physics: Aspects of the Study of Surfaces, Volume 27
The trend is toward combining as many as four or five measurements in the same vacuum chamber at the same time in order to be able to characterize more 34 C. B. DUKE completely the sample surface being examined. As we have seen, lowenergy electron diffraction (LEED), the main topic of this review, is only one of the possible techniques for surface analysis. It seems appropriate, therefore, to conclude our survey of these techniques with a brief indication of the role of LEED in fulfilling the requirements that dictate the design of surface analytical instruments.
First we derive expressions for the Born approximation to the elastic electron-solid cross-sections. Then we evaluate the cross-sections for the scattering of an incident electron from a static two-dimensional planar array of ion-cores parallel to a hypothetical surface of a monatomic solid. Finally, the solid is “built up” by stacking these two-dimensional atomic diffraction gratings on top of each other. The electron diffraction cross-sections from this array of diffraction gratings are calculated and interpreted in terms of ELEED intensities fro atomically flat surfaces of single-crystal solids.
DUKE values of the parameters in that model that are associated with a given set of observations. Five types of parameters occur in such a model. We already have defined the beam parameters (E, E‘, 9, O’, 4, 4‘) in the preceding subsection. , entropy) associated with the surface properties of the target. On the “atomic” scale, there are structural parameters describing the chemical identity, geometrical positions, and lattice vibrations of the ion-cores at the sample surface. Given the atomic structure, it is electronic parameters which describe the interaction of the incident electron with the constituents of the target.
Advances in Chemical Physics: Aspects of the Study of Surfaces, Volume 27 by PRIGOGINE, RICE