近距治疗^(192)Ir源参考空气比释动能率修正因子测试  

Brachytherapy ^(192)Ir Source Reference Air Kerma Rate Correction Factor Test

作　　者：支世杰 吴金杰[2] 王继 王培伟[2] 任世伟[1] ZHI Shi-jie;WU Jin-jie;WANG Ji;WANG Pei-wei;REN Shi-wei(Hebei University of Science and Technology,Hebei050018,China;National institute of metrology,Beijing 100029,China)

机构地区：[1]河北科技大学,石家庄050018 [2]中国计量科学研究院,北京100029

出　　处：《核电子学与探测技术》2022年第4期629-633,共5页Nuclear Electronics & Detection Technology

摘　　要：为完成近距治疗^(192)Ir放射源参考空气比释动能率的绝对测量,利用搭建的参考辐射场,对复合损失修正、杆散射修正、极性修正等三个修正因子进行了测试。复合损失修正、杆散射修正和极性修正的测量结果分别为1.0018、0.9965和1.0014;同时对测量结果的不确定度进行了评估,三个修正项的不确定度分别为0.020%、0.101%和0.108%。三项修正因子的测量完成,为近距离治疗^(192)Ir放射源参考空气比释动能率的绝对测量工作打下基础,为高剂量率近距离治疗质量控制体系的建立提供数据支撑。For accomplishing brachytherapy of the absolute measurement of reference air kerma rate for ^(192)Ir radioactive sources,by using the constructed reference radiation field,three correction factors such as compound loss correction,rod scattering correction and polarity correction are tested.The measurement results of compound loss correction,rod scattering correction and polarity correction are 1.0018,0.9965 and 1.0014,respectively;meanwhile,the uncertainty of the measurement results is evaluated,and the uncertainties of the three correction terms are 0.020%,0.101%,0.108%.The completion of the measurement of the three correction factors lays the foundation for the absolute measurement of the reference air kerma rate of the 12Ir radioactive source in brachytherapy,and provides data support for the establishment of the high-dose rate brachytherapy quality control system.

关 键 词：石墨空腔电离室 修正因子 复合损失 杆散射 极性电压 

分 类 号：TL72[核科学技术—辐射防护及环境保护]