Application of Confocal Micro-Beam X-Ray Fluorescence in Nondestructive Scanning Analysis of the Distribution of Elements in a Single Hair
LIU He-he, LIU Zhi-guo, SUN Tian-xi*, PENG Song, ZHAO Wei-gang, SUN Wei-yuan, LI Yu-de, LIN Xiao-yan, ZHAO Guang-cui, LUO Ping, DING Xun-liang
The Key Laboratory of Beam Technology and Material Modification of the Ministry of Education, Beijing Normal University, College of Nuclear Science and Technology, and Beijing Radiation Center, Beijing 100875, China
Abstract：The confocal micro X-ray fluorescence (XRF) based on polycapillary X-ray lens and conventional X-ray source was used to carry out the scanning analysis of the distribution of the elements in a single hair. The elemental distribution in the single hair was obtained. In the confocal micro XRF technology, the output focal spot of the polycapillary focusing X-ray lens and the input focal spot of the polycapillary parallel X-ray lens were adjusted confocally. The detector could only detect the X-rays from the overlapping foci. This confocal structure decreased the effects of the background on the X-ray spectra, and was accordingly helpful for improving the accuracy of this XRF technology. A polycapillary focusing X-ray lens with a high gain in power density was used to decrease the requirement of power of the X-ray source used in this confocal technology, and made it possible to perform such confocal micro XRF analysis by using the conventional X-ray source with low cost. Experimental results indicated that the confocal micro X-ray fluorescence based on polycapillary X-ray lens had potential applications in analyzing the elemental distribution of individual hairs.
Key words：Confocal micro X-ray fluorescence;Polycapillary X-ray lens;Hair;Element distribution
刘鹤贺，刘志国，孙天希*，彭 松，赵为刚，孙蔚渊，李玉德，林晓燕，赵广翠，罗 萍，丁训良 . 利用毛细管X光透镜共聚焦微束X射线荧光技术对单根头发中元素空间分布进行无损扫描分析 [J]. 光谱学与光谱分析, 2013, 33(11): 3147-3150.
LIU He-he, LIU Zhi-guo, SUN Tian-xi*, PENG Song, ZHAO Wei-gang, SUN Wei-yuan, LI Yu-de, LIN Xiao-yan, ZHAO Guang-cui, LUO Ping, DING Xun-liang. Application of Confocal Micro-Beam X-Ray Fluorescence in Nondestructive Scanning Analysis of the Distribution of Elements in a Single Hair. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(11): 3147-3150.
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