Taking customs seizures of false and concealed declaration of potassium nitrate and fireworks smuggling as example,The radiation detection technology based on RPM and SPM equipment and its application in detecting hazardous materials with radioactive properties is discussed.The research results indicate that the radiation counting rate characteristics of potassium nitrate and fireworks based on RPM and SPM detection are inconsistent with the radiation characteristics of declared goods,which can be used to determine the suspicion of false reporting.The radioactivity of potassium nitrate can far exceed the alarm thresholds of RPM and SPM,with a maximum net counting rate increase of 216.4％,and the SPM can correctly identify 40K in a short period of time.The radioactivity of fireworks and firecrackers is relatively low.Among the four batches of goods,the maximum net counting rate increased to 19.9％,which can trigger the highest alarm threshold for RPM,but the SPM cannot identify radioactive nuclides in a short period of time.By setting reasonable alarm thresholds for equipment,radiation detection technology can serve as an effective technical method and be applied in customs to combat the smuggling of dangerous goods with false or concealed declaration.
关键词
危险品/硝酸钾/烟花爆竹/辐射探测
Key words
hazardous materials/potassium nitrate/fireworks and firecrackers/radiation detection
维普
万方数据