Double-slit asymmetrical dynamical diffraction of X-rays in ideal crystals

Area of Science:

• Solid State Physics
• Crystallography
• X-ray Optics

Background:

• Young's interference fringes are a hallmark of wave diffraction.
• Dynamical diffraction in perfect crystals is crucial for understanding X-ray interactions.
• Asymmetrical diffraction introduces unique beam manipulation possibilities.

Purpose of the Study:

• To theoretically investigate double-slit asymmetrical dynamical diffraction of X-rays.
• To establish the formation and characteristics of Young's interference fringes.
• To explore potential applications in imaging and defect detection.

Main Methods:

• Theoretical modeling of X-ray dynamical diffraction in perfect crystals.
• Analysis of fringe formation based on Bragg orientation and asymmetry.
• Derivation of equations for fringe period and interference region size.

Main Results:

• Young's interference fringes are formed on the crystal exit surface.
• Fringe position depends on Bragg deviation and asymmetry angle.
• Fringe period is polarization-sensitive, increases with asymmetry, and affects fringe count.

Conclusions:

• Asymmetrical dynamical diffraction offers control over fringe characteristics.
• Large-scale Fourier dynamical diffraction holograms are achievable.
• This method enhances sensitivity for detecting defects and deformations compared to single-slit diffraction.