THEORY OF X-RAY DIFFRACTION
نویسندگان
چکیده
منابع مشابه
Ultrafast X-ray Diffraction Theory
Time-resolved X-ray diffraction patterns can be inverted to obtain photoinduced dynamics without resorting to additional and often unknown information (e.g., potential energy surfaces), as required in optical probe experiments. In order to interpret ultrafast X-ray diffraction measurements, we consider several time scales in X-ray experiments involving elastic versus inelastic scattering, quant...
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where P(U) = J y p ( U’ + u) p( u’)~u’ is the autocorrelation of p; IN(s) is the measured intensity in the direction S, of radiation diffracted from a beam of wavelength A propagating in the direction Sc, with s= (S-&,)/A [Eq. (2.11) in Guinier].‘1&) clearly depends on the configuration of the given sample through P(U), and thus on the separations of scatterers and the relative frequencies of s...
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This article proposes a new theory of X-ray scattering that has particular relevance to powder diffraction. The underlying concept of this theory is that the scattering from a crystal or crystallite is distributed throughout space: this leads to the effect that enhanced scatter can be observed at the `Bragg position' even if the `Bragg condition' is not satisfied. The scatter from a single crys...
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Introduction Individual X-Ray diffraction patterns of biological tissues are obtained via interference of coherent scattering with their electrons. Many scientists have distinguished normal and cancerous breast tissue, bone density, and urinary stone types using the X-Ray diffraction patterns resulting from coherent scattering. The goal of this study was to introduce an optimized method for obt...
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where the peak shapes were described by a pseudo-Voigt function and the background was modeled with an 6-term polynomial. Additionally, the PXRD patterns obtained at room temperature and 100 K were analyzed by Le Bail refinement using the GSAS and EXPGUI software, 2,3 where the peak shapes were described by a pseudo-Voigt function (CW profile function 3) and the background was modeled with an 4...
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ژورنال
عنوان ژورنال: Nature
سال: 1942
ISSN: 0028-0836,1476-4687
DOI: 10.1038/150450a0