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Study of X-ray topography using the super-Borrmann effect.

J Matsui1, K Takatsu2, Y Tsusaka2

  • 1Synchrotron Radiation Research Center, Hyogo Science and Technology Association, 1-490-2 Kouto, Shingu, Tatsuno, Hyogo 679-5165, Japan.

Journal of Synchrotron Radiation
|September 8, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces super-Borrmann X-ray topography for high-resolution dislocation imaging in thick crystals. This advanced technique enhances visibility by using forward-transmitted X-rays and multiple diffraction.

Keywords:
super-Borrmann effecttopography

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Area of Science:

  • Materials Science
  • Crystallography
  • Solid State Physics

Background:

  • X-ray topography is crucial for visualizing crystal defects.
  • Conventional methods like Lang topography struggle with thick crystals.
  • The Borrmann effect aids in X-ray transmission through crystals.

Purpose of the Study:

  • To develop and demonstrate a novel X-ray topography technique for imaging dislocations in thick crystals.
  • To leverage the super-Borrmann effect for enhanced defect visualization.
  • To compare the efficacy of super-Borrmann topography with conventional methods.

Main Methods:

  • Utilized synchrotron radiation for X-ray topography.
  • Employed a high-speed, high-resolution CMOS camera.
  • Applied the super-Borrmann effect with forward-transmitted X-rays in a three-beam case.
  • Calculated minimum attenuation coefficients for different X-ray polarizations.

Main Results:

  • Successfully displayed dislocation images with high speed and resolution.
  • Demonstrated that the super-Borrmann effect significantly increases attenuation coefficients compared to the two-beam Borrmann effect.
  • Confirmed the efficacy of super-Borrmann conditions for multiple-diffraction topographs.
  • Showcased the technique's applicability to thick crystals where traditional methods fail.

Conclusions:

  • Super-Borrmann X-ray topography is effective for high-resolution dislocation imaging in thick crystals.
  • The technique offers a significant advantage over conventional X-ray topography for challenging samples.
  • Forward-transmitted X-rays under super-Borrmann conditions provide a powerful tool for materials characterization.