By PRIGOGINE, RICE
The Advances in Chemical Physics sequence offers the chemical physics and actual chemistry fields with a discussion board for serious, authoritative reviews of advances in each zone of the self-discipline. full of state-of-the-art study said in a cohesive demeanour no longer came across in different places within the literature, each one quantity of the Advances in Chemical Physics sequence serves because the ideal complement to any complex graduate type dedicated to the learn of chemical physics.
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Extra resources for Advances in Chemical Physics: Aspects of the Study of Surfaces, Volume 27
B. Models of Electron-Solid Interactions In this section, we first discuss the main physical features of the electron-solid interaction. Then we describe how these features are incorporated into model Hamiltonians describing electron diffraction, Finally, we indicate the uncertainties in our present knowledge of the details of the electron-solid force law and their consequences for the applications of low-energy electron diffraction to determine the geometry of surface atoms and the dispersion relation of surface plasmons.
We recall from (1) in Part I that the intensity pattern determines only the translational symmetry parallel to the surface. Analysis of the magnitudes of the scattered intensities themselves is required to determine the geometry of surface atoms. We return to a more extensive discussion of the interpretation of intensity patterns in Part VII. , “specular,” k;, = kll) beam. The parameters describing the incident (unprimed variables) and exit (primed variables) beams are indicated in Fig. 8. The energy, polar angle, EXPE RI ME N TAL LY M E A S URE D QUANTlT IE S IN ELASTIC LOW-ENERGY ELECTRON DIFFRACTION (ELEED) - 1.
In the X-ray region, hv-104 eV, the wavelengths of the radiation are appropriate for observing its diffraction from crystalline solids. This diffraction occurs, associated with an atomic elastic scattering cross-section roughly proportional to Z 2 . Both diffraction and absorption are characteristic of the bulk solid because the associated mean free paths lie in the range c m s X 5 1 cm for almost all solids. Sharp features in the secondary electron emission spectrum, however, tend to be characteristic of the surface layers of the solid because of the short inelastic collision mean free path, A,,& I O A , of the secondary electrons themselves.
Advances in Chemical Physics: Aspects of the Study of Surfaces, Volume 27 by PRIGOGINE, RICE