基于GEANT4的^(60)Coγ辐照装置剂量率分布模拟  

A GEANT4 study for the dose rate distributions of a ^(60)Coγ-rays irradiation facility

作　　者：李磊[1] 曾凡松[1] 伍晓利[1] 俞祥忠[1] 李晓燕[1] 江虹[2] 李强[2] 黄玮[1] 杨桂霞[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]西南科技大学,绵阳621010

出　　处：《辐射研究与辐射工艺学报》2013年第2期60-64,共5页Journal of Radiation Research and Radiation Processing

基　　金：国防工业科技发展计划(B3120110005)资助

摘　　要：为使工业60Coγ辐照装置更好地应用于抗辐射加固研究,应用蒙特卡洛程序GEANT4模拟计算了辐照空间的剂量率分布,并搭建了基于ROOT程序的数据在线存储及离线处理平台。通过合理设计模拟过程,使得模拟结果的统计误差<5%。同时,建立了剂量率分布的计算模型,并利用重铬酸银剂量计完成了实验验证。GEANT4模拟、模型计算以及实验测量三者结果相符合,且模拟与实验的相对偏差<5%。这表明模拟过程正确描述了辐照空间的剂量率分布,所搭建的模拟和数据处理平台可用于相关实验的开展。A detailed GEANT4 Monte Carlo study was performed to calculate the dose rate distributions of an industrial 60Coγ-rays irradiation facility, so it could provide a better service for the research of radiation hardening. All data produced during simulations were on-line stored and off-line analyzed by ROOT. With careful design of simulation processes, the relative errors were less than 5%. For the validation purpose, experiments with ferrous sul- fate dosimeter were carried out. Furthermore, a computational model was constructed as a comparison. The relative deviations between simulated and experimental results were less than 5%. The satisfactory agreement of simulations between model and measurements indicates that our work has designed the processes of simulation and got the dose rate distributions in a correct way.

关 键 词：GEANT4 钴源辐照装置 剂量率 计算模型 重铬酸银剂量计 

分 类 号：O571.33[理学—粒子物理与原子核物理] O411.3[理学—物理]