为保证国家公众设施和人民群众的安全, 针对科研、医疗和工业探伤等方面使用放射源的数量日益增多的现象, 研制了一种用于探测核材料和放射性物质快速甄别的检测装置, 给出了相应的快速甄别算法.该装置具有体积小、质量小、拆装方便和使用灵活等优点.该装置采用有线和无线等2种数据通信方式, 具备固定布防和移动布防能力.在95％的置信水平下, 在距离探测器50cm处, 人员步行速度为1m/s, 放射源无屏蔽时, 对U3O8的探测灵敏度可达到10g.%To ensure the safety of national public facilities and the people, with the growing number of radiacitve source used in scientific research, medical treatment and industrial flaw detection, a device for nuclear and radioactive material detection is built. A rapid discrimination technique of radioactive material is also developed in the present work. The device involves a NaI(Tl)detector and four single-channel counters. The electronics module is miniaturized to achieve small volume and light weight, easily dismounted and flexibly used. Data are analyzed via fixed and moving average detection method and can be transmitted through wired or wireless web to remote monitor. When aperson is walking at the speed of 1m/s with a radiation source without shielding, the detection sensitivity can reach 10g U3O8 in the distance of 50cm from detector at the 95％ confidence level.
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