不同介质环境样品的符合修正方法研究  

Coincidence Correction Methods for Samples of Different Environmental Media

作　　者：顾先宝[1,2] 於国兵 卞岍雨 程李迅 许丰 张健军 盛六四 洪义麟[1] GU Xianbao;YU Cuobing;BIAN Qianyu;CHENG Lixun;XU Feng;ZHANG Jianjun;SHENG Liusi;HONG Yilin(University of Science and Technology of China,Hefei 230027,China;Anhui Radiation and Environment Supervision Station,Hefei 230071,China;The First Affiliated Hospital of USTC,Hefei 230001,China;Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国科学技术大学,合肥230027 [2]安徽省辐射环境监督站,合肥230071 [3]中国科学技术大学附属第一医院,合肥230001 [4]哈尔滨工程大学,哈尔滨150001

出　　处：《核电子学与探测技术》2024年第3期542-548,共7页Nuclear Electronics & Detection Technology

摘　　要：使用γ能谱测量放射性核素活度时,级联发射的γ射线会发生符合效应,影响测量结果。为了得到不同环境介质样品的符合修正因子,研究了简单级联发射模式的核素在不同介质中符合修正因子之间的关系,提出了利用水代替其他环境介质的符合修正因子计算方法。实验结果表明,使用该方法所得结果的最大偏差为2.8%。使用此方法不需要逐一制备不同介质标准源,它为多介质的辐射环境监测提供了一种简单的符合修正方法。When the activity of radionuclides is measured by gamma spectroscopy,a coincidence effect will occur for nuclides emiting gamma rays in cascade,which will affect the measurement results.We want to get the coincidence correction factor for different environmental media samples.The relationship between the coincidence correction factors of the simple cascade emission mode nuclides in different media was studied,and the calculation method of coincidence correction factors using water instead of other environmental media was proposed.The experimental results showed that the maximum deviation of the results obtained by this method was 2.8%.When using this method to calculate the coincidence correction factor,we do not need to prepare different media standard sources one by one,and it provides a simple coincidence correction method for multi-media radiation environment monitoring.

关 键 词：环境介质 符合修正 标准源 

分 类 号：TL816.4[核科学技术—核技术及应用]