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利用毛细管X光透镜搭建了三维共聚焦微束X射线荧光谱仪,处在激发道的多毛细管X射线会聚透镜和处在探测道的多毛细管X射线平行束透镜处于共聚焦状态,该共聚焦结构降低了X射线荧光光谱的背底,从而有利于降低的X射线荧光分析技术的探测极限。在上述共聚焦结构中,多毛细管X射线会聚透镜和多毛细管X射线平行束透镜的焦斑重合形成共聚焦微元,探测器只能探测到来自该共聚焦微元内的X射线荧光信号,当该共聚焦微元在样品移动时,就可利用该共聚焦技术原位无损得到样品内部的三维X射线荧光信息。该共聚焦技术使用的多毛细管X射线会聚透镜具有103量级的功率放大倍数,从而降低了该共聚焦技术对高功率X射线源的依赖程度,即利用低功率普通X射线源就可以设计毛细管X光透镜共聚焦X射线荧光技术。利用上述共聚焦微束X射线荧光谱仪对两种岩矿样品进行三维无损分析,在其中一种岩石中发现:Fe浓度大的区域Cu的浓度也大,这在一定程度上反映了岩矿自然生长的机理。实验结果证明:该共聚焦X射线荧光技术可以在不破坏样品情况下分析岩矿样品中元素成分组成和元素三维分布情况。该共聚焦三维微束X射线荧光技术在矿石勘察、玉器选材和鉴别、石质食用器皿、“赌石”和家用石质地板检测等领域具有潜在的应用。
A three-dimensional confocal microbeam X-ray fluorescence spectrometer was set up with a capillary X-ray lens. The multi-capillary X-ray condensing lens in the excitation channel and the multi-capillary X-ray parallel beam lens in the probe channel were in a confocal state. The confocal structure The background of the X-ray fluorescence spectrum is reduced, thereby facilitating the detection limit of the reduced X-ray fluorescence analysis technique. In the above confocal structure, the focal spots of the multi-capillary X-ray condensing lens and the multi-capillary X-ray parallel beam lens overlap to form a confocal micro element, and the detector can only detect the X-ray fluorescence signal from the confocal micro element, When the confocal micro-particles move in the sample, the confocal technique can be used to obtain in-situ three-dimensional X-ray fluorescence information in-situ without damage. The confocal technique uses a multi-capillarity X-ray converging lens with a power magnification of 103 orders, reducing the dependence of the confocal technique on high-power X-ray sources, ie, the ability to design capillaries using low-power, common X-ray sources X-ray lens confocal X-ray fluorescence technology. Using the above confocal microbeam X-ray fluorescence spectrometer for three-dimensional non-destructive analysis of two rock samples, it is found in one kind of rock that the concentration of Cu in the area with large Fe concentration is also large, which reflects to some extent the natural The mechanism of growth. The experimental results show that the confocal X-ray fluorescence technique can analyze the elemental composition and elemental three-dimensional distribution of rock samples without destroying the sample. The confocal three-dimensional micro-beam X-ray fluorescence technology in ore exploration, jade selection and identification, stoneware utensils, “gambling stone ” and home stone floor detection and other fields have potential applications.