8MeV辐照电子加速器辐射特性研究  

Study of Radiation Characteristics from 8MeV Irradiation Electron Accelerator

作　　者：洪天祺[1] 戴瑜[1] 

机构地区：[1]江苏省辐射环境保护咨询中心,江苏南京210019

出　　处：《中国辐射卫生》2015年第6期676-678,共3页Chinese Journal of Radiological Health

摘　　要：目的分析8 MeV辐照电子加速器的辐射特性。方法建立8 MeV电子轰击铅靶、铁靶、铝靶产生X射线的几何模型,使用MCNP5程序模拟计算得到了0°~180°方向上产生的X射线能谱和0°、90°、180°方向上的剂量率发射常数。结果剂量率发射常数与NCRP-51报告中的数据基本相符。结论剂量率发射常数具有明显的方向性,0°方向轰击铅靶最高,随着靶材原子序数的降低或角度的增大而减小;0°方向的X射线能谱最硬,随着靶材原子序数的降低或角度的增大而逐渐变软。Objective Analysis of the radiation characteristics of 8 MeV electron irradiation accelerator.Methods Established geometric model of X- ray from 8 MeV electrons incident on lead target ? iron target,,aluminum target,X ray energy spectrums from 0 degree to 180 degree and dose emission rates in 0 degree、90 degree、180 degree were calculated by MCNP5.Results Dose emission rates agree well with the data from NCRP Report No.51.Conclusion Dose emission rates have obvious direction,the maximum rate is in 0 degree on lead target and rates decrease with angle increasing or target atomic number reduction;X-ray energy spectrum in 0 degree is most hard and spectrums become soft with angle increasing or target atomic number reduction.

关 键 词：电子加速器 MCNP5 韧致辐射 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]