X-Ray Standing Waves at Crystal Surfaces
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چکیده
منابع مشابه
X-ray Standing Waves at Grazing Angles BY TERRENCE JACH
X-ray diffraction from crystal surfaces at grazing angles gives rise to X-ray standing waves above and below the surface. Expressions are derived for the fluorescence observed from atoms located on or in a crystal as a result of excitation by the grazing-angle X-ray standing waves. In addition to the dependence of the fluorescence on the position of the atom with regard to the crystal plane tha...
متن کاملFourier-expansion solution of atom distributions in a crystal using X-ray standing waves.
Term-by-term Fourier-expansion series, each made up of components having element-specific phases and amplitudes acquired with x-ray standing wave measurements on successive orders of Bragg reflections, are used to reconstruct impurity atom distributions in muscovite mica with respect to the (001) lattice without a priori assumptions on their structures.
متن کاملSurface Structure Determination with X-ray Standing Waves
Figure 1: A standing wave with the periodicity of the substrate lattice is generated by reflection from a single crystal. By scanning the photon energy of the incident wave through the Bragg condition the XSW field above the surface changes in a characteristic way. The emitted photoelectrons or Auger electrons that are generated by inelastic scattering processes can be used as element-specific ...
متن کاملPhoton-stimulated desorption and x-ray standing waves
Introduction X-ray standing waves (XSW) using electrons and fluorescence photons as secondary signals has become a standard technique to determine adsorbate structures. However, when a sample is irradiated by intense light, desorption of ions is also a frequently observed phenomenon which is known as photon-stimulated desorption (PSD). But, this signal is of a fundamentally different physical n...
متن کاملProbing Electrochemical Interfaces with X-ray Standing Waves
The utility of the X-ray standing wave technique for the study of electrochemical interfaces is demonstrated. A platinum/carbon LSM (layered synthetic microstructure) with a d spacing of 56 A and with platinum as the outermost layer was used as a substrate. A layer of iodide was adsorbed, followed by the electrodeposition of a layer of copper. Simultaneously monitoring of the reflectivity as we...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1980
ISSN: 0031-9007
DOI: 10.1103/physrevlett.44.1680