缓发中子铀分析技术以其快速、准确的特点在地质、生物、材料、核查等领域得到广泛的应用。针对传统缓发中子铀定量分析中固定照射时间、冷却时间和测量时间所带来的弊端,如样品中铀含量很高导致缓发中子计数率过高而造成计数丢失,或者铀含量较低导致计数统计不足而带来结果偏差较大的问题,提出利用“标准样品”得到的无计数率丢失且有足够好计数统计的标准衰减曲线对未知样品中铀元素的含量进行快速、准确定量。在微堆上的实验表明,缓发中子标准曲线法适用于较宽范围铀含量样品中铀的定量测定。 The technology of delayed neutron uranium analysis has been widely used in the fields of geology, biology, materials and verification for its rapid and accurate characteristics. In view of the drawbacks of fixed irradiation time, cooling time and measurement time in the quantitative analysis of traditional delayed-release neutron uranium, such as the high uranium content in the sample leads to the loss of counting due to the high counting rate of delayed neutron, or the more uranium content Low lead to the lack of statistics and the results lead to large deviation, proposed the use of “standard sample ” without loss of the count rate and good enough statistics of the standard decay curve of uranium in unknown samples for rapid, Accurate quantitative. Experiments on micro-stacks show that the delayed neutron standard curve method is suitable for the quantitative determination of uranium in a wide range of uranium content samples.