共查询到18条相似文献,搜索用时 62 毫秒
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介绍了现场X射线荧光勘查技术的理论基础、仪器设备和运用X荧光分析仪寻找伴生矿的方法技术.运用手提式X荧光分析仪对新疆的两个地区进行勘探,并采用强度影响系数法和特散比影响系数法对分析中存在的基体效应进行了校正,结果发现了高含量的钴伴生矿和达到工业开采利用的伴生钒、钛矿.证明手提式X荧光分析仪在野外勘探中对寻找伴生矿具有重大意义. 相似文献
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使用X光聚束系统的X射线荧光分析研究 总被引:2,自引:0,他引:2
复合光导管组成的X光透镜可将发散的X光束聚至直径φ0.5mm,聚束后的功率密度增加10^4倍,这种新型的X光透镜已用于X射线荧光分析研究,使用X光管功率仅2W,而探测限可达10^-9-10^10g. 相似文献
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本文应用GEProspeedCT测量了KI系列稀释溶液,观察了KI浓度与CT值的对应关系,探讨了应用 ̄(241)Am源激发X荧光法测量样品碘含量的探测水平,提出了建立免疫X荧光分析方法的设想。 相似文献
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介绍的应用于便携式X射线荧光仪的稳谱技术是利用X射线与物质作用产生的散射峰作为参考源实现稳谱,其方法简便,不附加参考辐射源,稳谱效果好,采用该技术的CD-4微机化X射线荧光仪稳定性好,整机性能明显改善。 相似文献
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介绍了一种新颖的的X荧光测量仪。重点阐述了以ADμC812单片机为控制核心的多道脉冲幅度分析器的设计,以及以Labview为软件开发平台的谱处理软件和USB固件设计。系统由多道分析器对探头输出的信号进行分析,然后通过USB接口与PC机通信,再由虚拟谱软件对数据进行处理。结果表明该系统功能完善、性能可靠。 相似文献
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V.-D. Hodoroaba M. Radtke V. Rackwitz 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2010,268(24):3568-1498
X-ray scattering may contribute significantly to the spectral background of X-ray fluorescence (XRF) spectra. Based on metrological measurements carried out with a scanning electron microscope (SEM) having attached a well characterised X-ray source (polychromatic X-ray tube) and a calibrated energy dispersive X-ray spectrometer (EDS) the accuracy of a physical model for X-ray scattering is systematically evaluated for representative samples. The knowledge of the X-ray spectrometer efficiency, but also of the spectrometer response functions makes it possible to define a physical spectral background of XRF spectra. Background subtraction relying on purely mathematical procedures is state-of-the-art. The results produced by the analytical model are at least as reliable as those obtained by Monte-Carlo simulations, even without considering the very challenging contribution of multiple scattering. Special attention has been paid to Compton broadening. Relevant applications of the implementation of the analytical model presented in this paper are the prediction of the limits of detection for particular cases or the determination of the transmission of X-ray polycapillary lenses. 相似文献