海洋放射性现场探测谱仪的机械优化设计  

The mechanical design optimization of a spectrometer for in situ marine radioactivity monitoring

作　　者：冯现东 张云燕 张颖颖 吴丙伟 侯广利 FENG Xian-dong;ZHANG Yun-yan;ZHANG Ying-ying;WU Bing-wei;HOU Guang-li(Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology,National Engineering and Technological Research Center of Marine Monitoring Equipment,Institute of Oceanographic Instrumentation,Qilu University of Technology(Shandong Academy of Sciences),Qingdao 266061,China)

机构地区：[1]齐鲁工业大学(山东省科学院)山东省科学院海洋仪器仪表研究所,山东省海洋监测仪器装备技术重点实验室,国家海洋监测设备工程技术研究中心,山东青岛266061

出　　处：《山东科学》2021年第4期21-25,共5页Shandong Science

基　　金：国家重点研发计划(2016YFC1402500,2016YFC1401201);国家自然科学基金(41606111);青岛市应用基础研究计划青年专项(19-6-2-26-cg)。

摘　　要：为提高海洋放射性现场探测NaI(Tl)谱仪的探测性能,采用蒙特卡罗仿真和统计计算方法,研究和分析谱仪封装、材料和尺寸等机械设计对探测性能的影响规律。综合考虑伽马射线衰减和密封、耐压及耐腐蚀等要求,开展谱仪的机械优化设计和海上现场检测实验。优化谱仪达到了对40K最小探测活度约0.30 Bq/L,现场测量相对误差为0.45%。该研究对海洋放射性现场探测谱仪的性能优化设计和现场应用具有重要的指导意义。To improve the detection performance of an NaI(Tl)spectrometer for in situ marine radioactivity monitoring,Monte Carlo simulation and statistical calculation methods were used to study and analyze the effect of mechanical design of spectrometer package,material,and size on detection performance.Considering the requirements of gamma ray attenuation,sealing,pressure resistance,and corrosion resistance,the mechanical optimization design of the spectrometer and on-site detection experiments were conducted.The minimum detectable activity of the optimized spectrometer was approximately 0.30 Bq/L for 40K,and the relative error of measurement was 0.45%.This study has important guiding significance for the performance optimization design and field application of gamma spectrometers for in situ marine radioactivity monitoring.

关 键 词：放射性监测 伽玛谱仪 蒙特卡罗计算 优化设计 探测效率 

分 类 号：P716.19[天文地球—海洋科学] X853[环境科学与工程—环境工程]