In situ measurement of environmental γ radiation dose rates of key nuclides for large radioactive surface sources  

作　　者：Ze-Qian Wu Jian Sun Wei-Qi Huang Bai-Rong Wang Jin-Xing Cheng Jiang-Feng Wu Yong-Hong Wang Biao Yuan Sheng Qi Kun Shan 

机构地区：[1]Institute of NBC Defence,Beijing 102205,China [2]Beijing New-High Technology Academy,Beijing 100094,China

出　　处：《Nuclear Science and Techniques》2025年第1期69-79,共11页核技术(英文)

摘　　要：To monitor nuclear and radiation emergencies,it is crucial to obtain accurate in situ measurements of the environmentalγ radiation dose rate from key radionuclides,particularly for large radioactive surface sources.The methods currently used for measuring dose rates are inadequate for obtaining the dose rates of key radionuclides and have large angular response errors when monitoring surface sources.To address this practical problem,this study proposes three methods for measuring the dose rate:the weighted peak total ratio,mean value regression,and numerical integration methods.These methods are based on energy-spectrum measurement data,and they were theoretically derived and numerically evaluated.Finally,a 1-m-long hexagonal radioactive surface source was integrated into a larger surface source.In situ measurement experiments were conducted on a large radioactive surface source using a dose-rate meter and a portable HPGespectrometer to analyze the errors of the three aforementioned methods and verify their validity.

关 键 词：Environmentalγradiation dose rate HPGespectrometer Key radionuclides Radioactive surface source 

分 类 号：TL818.4[核科学技术—核技术及应用]