Fine structure of weak kinematical diffraction beams emerging from wedge‐shaped crystals

R. de Ridder; J. van Landuyt; R. Gevers; S. Amelinckx

doi:10.1002/pssb.19700420218

Fine structure of weak kinematical diffraction beams emerging from wedge‐shaped crystals

R. de Ridder, J. van Landuyt, R. Gevers, S. Amelinckx

Research output › peer-review

Abstract

The fine structure of a weak kinematical diffraction beam, due to the presence of a wedge shaped crystal part in the selected area, is derived by applying a Fourier transformation to the expression of the wave function deduced within the two‐beam kinematical theory. Also the correspondence between the fine structure of a weak beam and the dark field image, produced by this beam, is analysed. Two general types of wedges are considered: wedges formed by grain or twin boundaries and general genuine wedges bound by vacuum. The theoretical results for the fine structure caused by the two types of wedges are compared with experiments on twin boundaries in stainless steel and on MgO crystals. The observations are in very good agreement with the theory.

Original language	English
Pages (from-to)	645-659
Number of pages	15
Journal	Physica Status Solidi (B)
Volume	42
Issue number	2
DOIs	https://doi.org/10.1002/pssb.19700420218
State	Published - 1970

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1002/pssb.19700420218

Cite this

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title = "Fine structure of weak kinematical diffraction beams emerging from wedge‐shaped crystals",

abstract = "The fine structure of a weak kinematical diffraction beam, due to the presence of a wedge shaped crystal part in the selected area, is derived by applying a Fourier transformation to the expression of the wave function deduced within the two‐beam kinematical theory. Also the correspondence between the fine structure of a weak beam and the dark field image, produced by this beam, is analysed. Two general types of wedges are considered: wedges formed by grain or twin boundaries and general genuine wedges bound by vacuum. The theoretical results for the fine structure caused by the two types of wedges are compared with experiments on twin boundaries in stainless steel and on MgO crystals. The observations are in very good agreement with the theory.",

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year = "1970",

doi = "10.1002/pssb.19700420218",

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T1 - Fine structure of weak kinematical diffraction beams emerging from wedge‐shaped crystals

AU - de Ridder, R.

AU - van Landuyt, J.

AU - Gevers, R.

AU - Amelinckx, S.

PY - 1970

Y1 - 1970

N2 - The fine structure of a weak kinematical diffraction beam, due to the presence of a wedge shaped crystal part in the selected area, is derived by applying a Fourier transformation to the expression of the wave function deduced within the two‐beam kinematical theory. Also the correspondence between the fine structure of a weak beam and the dark field image, produced by this beam, is analysed. Two general types of wedges are considered: wedges formed by grain or twin boundaries and general genuine wedges bound by vacuum. The theoretical results for the fine structure caused by the two types of wedges are compared with experiments on twin boundaries in stainless steel and on MgO crystals. The observations are in very good agreement with the theory.

AB - The fine structure of a weak kinematical diffraction beam, due to the presence of a wedge shaped crystal part in the selected area, is derived by applying a Fourier transformation to the expression of the wave function deduced within the two‐beam kinematical theory. Also the correspondence between the fine structure of a weak beam and the dark field image, produced by this beam, is analysed. Two general types of wedges are considered: wedges formed by grain or twin boundaries and general genuine wedges bound by vacuum. The theoretical results for the fine structure caused by the two types of wedges are compared with experiments on twin boundaries in stainless steel and on MgO crystals. The observations are in very good agreement with the theory.

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DO - 10.1002/pssb.19700420218

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VL - 42

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EP - 659

JO - Physica Status Solidi (B)

JF - Physica Status Solidi (B)

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