X-ray diffraction with a Bragg angle near pi/2 and its applications

Area of Science:

• Solid-state physics
• Crystallography
• Materials science

Background:

• X-ray dynamical diffraction is crucial for understanding crystal structures.
• Bragg angles near pi/2 (90 degrees) present unique diffraction behaviors.
• Silicon's well-defined lattice planes are ideal for diffraction studies.

Purpose of the Study:

• To investigate X-ray dynamical diffraction phenomena at Bragg angles close to pi/2.
• To analyze X-ray transmissivity and reflectivity from silicon (991) lattice planes.
• To explore the potential of specific crystal arrangements as high-resolution monochromators.

Main Methods:

• Experimental observation of X-ray transmissivity and reflectivity.
• Utilizing a silicon thin plate with (991) lattice planes.
• Comparison of experimental data with theoretical calculations based on the Darwin approach.

Main Results:

• Observed X-ray transmissivity and reflectivity patterns were recorded.
• Experimental results showed good agreement with Darwin approach calculations.
• Diffraction conditions near pi/2 Bragg angle were successfully met.

Conclusions:

• The Darwin approach accurately models X-ray dynamical diffraction near pi/2.
• A two-crystal plate system satisfying these conditions could function as a high-resolution monochromator.
• This setup offers potential advancements in X-ray optics and spectroscopy.