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Development of confocal micro X-ray fluorescence instrument using two X-ray beams |
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| Institution: | 1. Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku Osaka, 558-8585, Japan;2. PRESTO-JST (Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency), 4-1-8 Honcho Kawaguchi, Saitama, 332-0012, Japan;3. X-ray Optical Laboratory, Institute of Low Energy Nuclear Physics, Beijing Normal University, No. 19, Xin Jie Kou Wai Da Jie, Beijing, 100875, China |
| Abstract: | A new confocal micro X-ray fluorescence instrument was developed. This instrument has two independent micro X-ray tubes with Mo targets. 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 effects of the excitation of two X-ray beams were investigated. The instrument enabled highly sensitive three-dimensional X-ray fluorescence analysis. We confirmed that the X-ray fluorescence intensity from the sample increased by applying the two independent X-ray tubes in confocal configuration. Elemental depth profiling of black wheat was demonstrated with the result that each element in the surface coat of a wheat grain showed unique distribution. |
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