Development of confocal 3D micro-XRF spectrometer with dual CrMo excitation†
Development of confocal 3D micro-XRF spectrometer with dual CrMo excitation†
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DOI：
10.1002/xrs.957
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发表时间：
2007-05
影响因子：
1.2
通讯作者：
K. Tsuji;K. Tsuji;K. Nakano
中科院分区：
文献类型：
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作者：
K. Tsuji;K. Tsuji;K. Nakano
研制了一种基于两个独立的多毛细管X射线透镜和两个X射线源(铬和钼靶)的共焦装置的新型三维微型X射线荧光测定仪。在每个X射线管上安装一个完整的多毛细管X射线透镜。另一半多毛细管透镜连接在硅漂移X射线探测器(SDD)上。将三个镜头的焦距调整到一个共同的位置。用10μm厚的Au箔估算的深度分辨率约为Au La的X射线能量的90μm。研究了双铬钼X射线束激发的影响。结果表明，采用共焦结构的铬靶X射线管可以提高轻元素的X射线荧光强度。在所提出的共焦配置中，在环境空气压力下非破坏性地对籽粒中的主要元素进行了3D元素测绘。种子的每个元素在不同的深度层中表现出不同的映射图像。
A new 3D micro-XRF instrument based on a confocal setup using two independent polycapillary x-ray lenses and two x-ray sources (Cr and Mo targets) was developed. A full polycapillary x-ray lens was attached to each x-ray tube. Another half polycapillary lens was attached to a silicon drift x-ray detector (SDD). The focal spots of the three lenses were adjusted to a common position. The depth resolutions that were evaluated by use of a 10-μm thick Au foil were approximately 90 μm for the x-ray energy of Au La. The effects of the dual Cr-Mo x-ray beam excitation were investigated. It was confirmed that the XRF intensity of light elements was increased by applying the Cr-target x-ray tube in a confocal configuration. In the proposed confocal configuration, 3D elemental mapping of the major elements of an amaranth seed was performed nondestructively at ambient air pressure. Each element of the seed showed different mapping images in the different depth layers.