我国同步辐射小角X光散射装置

小角X光散射是当X光照射到物质上时发生的在原光束附近小角度范围内的电子相干散射,凡是存在纳米尺度的电子密度不均匀区的物质均会产生小角X光散射现象,因此它是表征纳米、多孔材料结构的理想手段。普通X光源产生的X光强度弱,限制了小角X光散射的应用,采用同步辐射为X光源,则可以大大提高X光强度。目前我国已建立同步辐射小角X光散射站,本文对其装置进行了介绍。

Facility of Chinese Synchrotron Radiation Small Angle X- Ray Scattering

Small angle Xray scattering (SAXS) originates from spatial fluctuations of the electronic density within a material. It is ideally suitable for investigating the geometric structure of inhomogeneous material containing regions in which fluctuation or variation in electron density extends over distances of about 0.4nm to 200nm (e.g. particulate or porous materials). The Xray intensity emitting from common Xray source is always very low, so that the application of SAXS is limited. By using synchrotron radiation with high intensity as Xray source, SAXS measurement can be well improved. This short paper introduces the facility of Chinese synchrotron radiation small angle Xray scattering.