同步辐射X射线衍射的谐波成分计算

CALCULATION ON THE HARMONIC DIFFRACTION OF SYNCHROTRON RADIATION X-RAYS

结合动力学衍射公式和同步辐射谱,导出了衍射谐波的计算公式。作为应用的例子,计算了完美Si单晶常用的几个衍射晶面的同步辐射X射线衍射的谐波成分。数据适用于北京正负电子对撞机同步辐射实验室形貌站(4W1A光束线)。结果表明:(333)衍射中谐波成分丰富,而其它衍射中谐波成分较弱。

The formula of harmonic diffraction from a perfect crystal is worked out based on the concept of dynamical diffraction and the spectrum of synchrotron radiation. As an applica-tion, the harmonic diffraction from several commonly used planes of Si crystal is calculated, which reveals that there are more harmonics in the chosen (333) diffraction than the other planes. The data are merely true for the Topography Station at Beijing Synchrotron Radia-tion Lab. (BSRL), Beijing Electron-Positron Collider (BEPC).