X射线吸收光谱技术中的滤光片研制

在同步辐射X射线吸收光谱(XAS)实验中，X射线滤光片用于吸收样品的康普顿散射和弹性散射，改善荧光信号的质量。我们将ZnO颗粒分散在聚氨酯溶液里，通过恰当的喷涂工艺，获得ZnO滤片。X射线衍射(XRD)，X射线荧光(XRF)及X射线吸收光谱(XAS)实验结果表明：在滤片制备过程中，ZnO结构保持不变。进一步地，ZnO滤片用于测量Ga2O3的GaK边XAS谱，显示出好的信噪比。采用同样的方法还制备了其它X射线滤光片，表明这种X射线滤光片制备技术的可行性和实用性。

Preparation and characteristics of X-ray filter in X-ray absorption spectroscopy techniques

X-ray filters are used to absorb Compton and elastic scattering of samples, and to improve the quality of fluorescence signal in X-ray absorption spectroscopy (XAS) experiments. In the paper, ZnO filter is prepared by mixing ZnO powder into polyurethane, and then ZnO film is obtained by the spraying method. XRD (X-Ray Diffraction), XRF(X-ray fluorescence) and X-ray absorption spectroscopy (XAS) experiments indicate that the ZnO structure remains in the preparation process of the filter. Further, the ZnO filter is used in the Ga K edge-XAS measurement of Ga2O3, showing a good signal noise ratio. Other X-ray filters can also be prepared by the same method, which proves to be practical.