Faculty of Physics, Yerevan State University, Alex Manoogian 1, Yerevan, 0025, Armenia.
Acta Crystallogr A Found Adv. 2023 Jul 1;79(Pt 4):353-359. doi: 10.1107/S2053273323004345. Epub 2023 Jun 20.
The theoretical investigation of double-slit X-ray dynamical diffraction in curved crystals shows that Young's interference fringes are formed. An expression for the period of the fringes has been established which is polarization sensitive. The position of the fringes in the cross section of the beam depends on the deviation from the Bragg exact orientation for a perfect crystal, on the curvature radius and on the thickness of the crystal. This type of diffraction can be used for determination of the curvature radius by measuring the shift of the fringes from the centre of the beam.
双缝 X 射线晶体动力学衍射的理论研究表明，杨氏干涉条纹形成。建立了条纹周期的表达式，该表达式对偏振敏感。条纹在光束横截面中的位置取决于偏离完美晶体布拉格精确取向的程度、曲率半径和晶体厚度。通过测量条纹从光束中心的偏移量，可以利用这种类型的衍射来确定曲率半径。
