摘要
为充分了解新建立的γ射线标准辐射场剂量分布特性,对辐射场剂量分布进行测试与修正分析研究。在两个测量点之间的距离远远小于源探距的情况下,忽略空气衰减的影响,计算出源探距误差,对源探距进行修正,降低了测量值和理论值的相对误差,也解决了测量值高于衰减规律计算的理论值的问题;在源探距已做修正的前提下,做空气衰减修正,修正后的测量值与理论值的相对误差在1%以内。源探距修正和空气衰减修正是进行辐射场剂量分布特性分析的有效方法。
To fully understand the dose distribution characteristics of the newly established standard gammaray radiation field,the dose distribution of the radiation field was tested and corrected.When the distance between two near measuring points is far less than the distance between source and detector and the influence of air attenuation is neglected,the error of the distance between source and detector is calculated and corrected.The relative error between the measured values and the theoretical values is reduced,and the problem that the measured value is higher than the theoretical value calculated by the attenuation law is solved.On the premise that the distance between source and detector has been corrected,the air attenuation correction is carried out and the relative error between the corrected measurement values and the theoretical values is less than 1%.Correction of the distance between source and detector and correction of air attenuation are effective methods for analyzing the dose distribution characteristics of radiation field.
作者
王攀峰
王双玲
张益
高申星
龙成章
李胜春
WANG Panfeng;WANG Shuangling;ZHANG Yi;GAO Shenxing;LONG Chengzhang;LI Shengchun(Henan Institute of Metrology,Zhengzhou 450000,China;Sanmenxia Testing Center of Quality and Technology Supervision and Inspection,Sanmenxia 472000,China)
出处
《中国测试》
CAS
北大核心
2020年第2期46-49,共4页
China Measurement & Test
基金
河南省市场监督管理局科技计划项目(2017zj94,2018zj95)
关键词
γ射线标准辐射场
距离平方反比律
源探距修正
空气衰减修正
数据拟合
standard gamma ray radiation field
distance inverse square law
correction of the distance between source and detector
correction of air attenuation
data fitting
