^(60)Co放射源辐照装置辐射场测量  

Measurement of radiation field of ^(60)Co source irradiation facility

作　　者：王东玺 孙涛 刘海侠 周红召 李崇伟 管弦 WANG Dongxi;SUN Tao;LIU Haixia;ZHOU Hongzhao;LI Chongwei;GUAN Xian(State Key Laboratory of NBC Protection for Civilian,Beijing 102205)

机构地区：[1]国民核生化灾害防护国家重点实验室,北京102205

出　　处：《辐射防护》2024年第S01期8-12,共5页Radiation Protection

摘　　要：放射性核素及辐照发生装置是产生参考辐射场的通用方式,根据国家标准要求,建立了一套γ射线参考辐射标准装置。介绍了γ射线辐照装置的结构组成、物理原理和技术路线,并利用经过校准的标准设备对^(60)Co辐射场进行测量。测量结果表明该辐射场的空气比释动能率符合距离平方反比规律(r^(2)约为1);距离放射源1100 mm处射束截面直径200 mm内空气比释动能率变化小于5%;快门过渡时间约为0.74 s。Radionuclides and radiation generating devices are general way to produce reference radiation fields.According to national standards,a reference γ radiation standard device has been constructed.Firstly,the structural composition,physical principle and technical route of the γ-ray Irradiation Facility were introduced.Secondly,the reference radiation filed of ^(60)Co source was measured by calibrated standard equipment.The measurement results show that the air kerma rate of the radiation field conforms well to the inverse square of the distance(R^(2)≈1).The air kerma rate at 1100 mm from the center of the source vary less 5% within 200 mm of field diameter,and the shutter transition time is about 0.74 s.

关 键 词：^(60)Co辐照装置 空气比释动能率 距离平方反比规律 辐射场均匀性 

分 类 号：O571[理学—粒子物理与原子核物理]