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Origin of irregular X‐ray mirage fringes from a bent, thin crystal

Fukamachi, Tomoe ; Kawamura, Takaaki

Acta crystallographica. Section A, Foundations and advances, 2022-09, Vol.78 (5), p.422-429 [Periódico revisado por pares]

5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography

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  • Título:
    Origin of irregular X‐ray mirage fringes from a bent, thin crystal
  • Autor: Fukamachi, Tomoe ; Kawamura, Takaaki
  • Assuntos: bent crystal ; Crystals ; Diffraction ; Diffraction theory ; dynamical theory of X‐ray diffraction ; Interference ; Interference fringes ; mirage fringes ; Research Papers ; Strain analysis ; Vibration
  • É parte de: Acta crystallographica. Section A, Foundations and advances, 2022-09, Vol.78 (5), p.422-429
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: The dynamical theory of diffraction is used to analyse irregular X‐ray mirage interference fringes observed in Si220 X‐ray reflection topography from a weakly bent, thin crystal due to gravity. The origin of the irregular fringes is attributed to the interference between mirage diffracted beams and a reflected beam from the back surface, which is a new type of interference fringe. The irregular fringes are reproduced by calculating the reflected intensities numerically. The effects of absorption and thermal vibration are quite important for the reproduction. The result shows that the interference fringes depend on the strain as well as the thickness of the crystal, which indicates that the fringes should be useful for analysing weak strain in a crystal as an application. Irregular X‐ray mirage interference fringes observed in Si220 X‐ray reflection topography from a weakly bent, thin crystal are analysed using the dynamical theory of diffraction. The origin is the interference between two or more mirage diffracted beams and one reflected beam from the back surface.
  • Editor: 5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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