基于蒙特卡罗效率刻度方法的海洋原位放射性监测技术研究  

Study on Marine In-Situ Radioactivity Monitoring Technique Based on Monte Carlo Efficiency Calibration Method

作　　者：任国兴 厉运周 张颖颖 刘东彦 Ren Guoxing;Li Yunzhou;Zhang Yingying;Liu Dongyan(Faculty of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;Institute of Oceanographic Instrumentation,Qilu University of Technology(Shandong Academy of Sciences),Qingdao 266100,China)

机构地区：[1]中国海洋大学信息科学与工程学部,山东青岛266100 [2]齐鲁工业大学(山东省科学院)海洋仪器仪表研究所,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2022年第12期142-146,154,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41606111)资助。

摘　　要：目前海洋的放射性监测受到越来越多的关注,针对海洋原位放射性监测技术中的探测器效率刻度难题,本文采用蒙特卡罗方法对NaI(Tl)探测器进行了模拟研究,建立了NaI(Tl)探测器的仿真模型,模拟了不同能量下的探测曲线,完成了对探测器的效率刻度并拟合了效率刻度曲线。在此基础上,本文给出了NaI(Tl)探测器的设计原理、构成及封装方法,并在青岛海域对研制的探测器进行了海上试验。海上试验显示,蒙特卡罗方法模拟的数据与海上试验数据有很好的一致性。研究结果表明,使用本研究的方法可有效解决放射性测量仪器的效率刻度难题,方便测量仪器的现场快速布放。In order to solve the problem of NaI(Tl)detector efficiency calibration in marine in-situ radioactivity monitoring technology,the Monte Carlo method is used to simulate the NaI(Tl)detector,and the simulation model of the NaI(Tl)detector is established by MNCP program.The detection curves under different energy are simulated,the efficiency calibration of the detector is realized and the efficiency calibration curve is fitted.On this basis,combined with the characteristics of marine in-situ radioactivity monitoring,the system design and structure packaging method of NaI(Tl)detector are proposed.The field test of the developed monitoring instrument in Qingdao sea area is carried out,and the detection efficiency of ^(40)K is used to verify the method.The experimental results show that the simulation results are in good agreement with the measured results.

关 键 词：放射性 效率刻度 蒙特卡罗 原位 海洋 

分 类 号：X837[环境科学与工程—环境工程] P716[天文地球—海洋科学]