CAJ | 학술논문

头发中的元素与人的饮食和健康状况有关，对头发中元素的分析，不仅可用于刑事物证鉴别，还可为疾病的预防和治疗提供依据，因此，如何检测头发中元素分布等信息倍受人们关注。本文利用基于毛细管X光透镜和实验室普通X射线光源的共聚焦微束X射线荧光技术对单根头进行了无损扫描分析，分析了单根头发中元素的空间分布。在该毛细管X光透镜共聚焦微束X射线荧光技术中，毛细管X光会聚透镜的出口焦斑和毛细管X光平行束透镜的入口焦斑处在共聚焦状态，从而形成共聚焦微元，探测器只能探测到来自该共聚焦微元中的X射线信号，降低了背底信号对X射线荧光谱的影响，从而有利于提高该共聚焦X射线荧光技术的分析精度。该共聚焦技术中采用了具有高功率密度增益的毛细管X光会聚透镜，降低了该共聚焦X射线荧光技术对X射线光源功率的要求，从而保证了该共聚焦技术可以采用实验室普通X射线光源，降低了实验成本。实验表明，毛细管X光透镜共聚焦微束X射线荧光技术在单根头发元素分布检测中具有应用价值。
두발중적원소여인적음식화건강상황유관，대두발중원소적분석，불부가용우형사물증감별，환가위질병적예방화치료제공의거，인차，여하검측두발중원소분포등신식배수인문관주。본문이용기우모세관X광투경화실험실보통X사선광원적공취초미속X사선형광기술대단근두진행료무손소묘분석，분석료단근두발중원소적공간분포。재해모세관X광투경공취초미속X사선형광기술중，모세관X광회취투경적출구초반화모세관X광평행속투경적입구초반처재공취초상태，종이형성공취초미원，탐측기지능탐측도래자해공취초미원중적X사선신호，강저료배저신호대X사선형광보적영향，종이유리우제고해공취초X사선형광기술적분석정도。해공취초기술중채용료구유고공솔밀도증익적모세관X광회취투경，강저료해공취초X사선형광기술대X사선광원공솔적요구，종이보증료해공취초기술가이채용실험실보통X사선광원，강저료실험성본。실험표명，모세관X광투경공취초미속X사선형광기술재단근두발원소분포검측중구유응용개치。
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 per-form 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 dis-tribution of individual hairs .