完整布拉格反射型晶体衍射特性的理论研究

利用x射线衍射动力学理论研究了完整布拉格反射型晶体衍射特性,给出晶体衍射强度分布图,并计算了完整晶体积分反射强度和衍射强度分布半高宽。结果表明:在相同的能量下,不同类型晶体的衍射强度分布不同;在相同的布拉格角条件下,不同类型晶体积分反射强度和衍射强度分布半高宽也不同;当布拉格角大于45°时,晶体的积分反射强度与衍射强度分布的半高宽随着布拉格角的增大而迅速增大。

Theoretic studies of diffraction characters of perfect bragg crystals in reflectivity

Some studies are carried out on the diffraction characters of perfect bragg crystals in reflectivity with the dynamical theory of x-ray diffraction,some figures of the diffraction intensity distribution are given,and some calculations are given for the integral reflection intensity and the width of the diffraction intensity distribution.The results show that the diffraction intensity distribution with the same energy,the integral reflection intensity and the width of the diffraction intensity distribution with the same bragg angles are different for different crystals,and a fast increase of the integral reflection intensity and the width of the diffraction intensity distribution when bragg angles are larger than 45°.