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本文叙述一个用缓发中子计数法测铀的测量装置,测天然铀的探测极限为0.05ppm,测~(235)U的深测极限为0.4ppb;无试剂空白误差;无γ平衡问题,没有基体和其它干扰;在样品含天然铀1ppm时,分析结果的误差小于4.3％;分析一个样品的时间约3分钟;可自动分析大量的样品,能及时给出分析结果,样品非破坏。本方法特别适用于大规模地质普查样品的分析。
In this paper, a measuring device for measuring uranium by slow neutron counting is described. The detection limit of natural uranium is 0.05ppm, the deep detection limit of ~ (235) U is 0.4ppb, blank reagent-free error, No matrix and other interference; when the sample contains 1ppm of natural uranium, the error of the analysis result is less than 4.3%; the time of analyzing a sample is about 3 minutes; a large number of samples can be automatically analyzed; the analysis result can be given promptly; The method is especially suitable for the analysis of large-scale geological survey samples.