Kinematical x-ray standing waves for crystal structure investigations
نویسندگان
چکیده
منابع مشابه
Surface 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 ...
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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.
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The quantitative structure determination of adsorbed species on quasicrystal surfaces has so far appeared to present insurmountable problems. The normal incidence standing x-ray wave field technique offers a simple solution, without extensive data sets or large computations. Its application to quasicrystals raises several conceptual difficulties that are related to the phase problem in x-ray di...
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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...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2005
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.71.165404