IP板测量γ射线辐射场参数研究  

Study on the Measurement of Gamma-Ray Radiation Field by IPs

作　　者：黄建微[1] 李德红[1] 党永乐 吴笛[1] 王乃彦[2,3] 郝艳梅[1] 

机构地区：[1]中国计量科学研究院,北京100029 [2]北京师范大学核科学与技术学院,北京100875 [3]中国原子能科学研究院,北京102413

出　　处：《核电子学与探测技术》2017年第6期559-563,共5页Nuclear Electronics & Detection Technology

基　　金：中国计量科学研究院基本科研业务费(25-AKY1623)资助

摘　　要：将IP板应用到γ射线辐射场测量中,测量参考辐射场射野的二维分布,给出射野尺寸及均匀度,结果与电离室扫场结果一致;基于IP板对γ射线测量结果,对IP板的衰退特性作研究,结果显示IP板适用于短周期剂量监测,并由实验得到了由信号衰退造成的测量结果修正系数;IP板对单能γ射线的吸收剂量响应的线性拟合的确定系数R2=0.999 77,得到了IP板的137Csγ吸收剂量响应的剂量率依赖关系,并给出了剂量率修正系数。The IPs（imaging plate） have excellent characteristics of high radiation sensitivity and good position resolution,however,few data are available on the absolute IP sensitivities to X/γ-ray with mid/high energy. In order to apply them to the reference radiation field measurement,the performance of IPs with137 Cs was studied： The two-dimensional distribution of reference radiation field was obtained,the radiation field size and uniformity were measured through the two-dimensional distribution diagram,which is the same with the results obtained by scanning the ionization chamber. Based on the accuracy of the IPs＇ results,study on the fade rates of IPs was carried out,then the correction coefficient of signal fading was obtained. The absorbed dose response of IPs for gamma-ray was got,and the R2 of the linear fitting is 0. 999 77. Besides,the dependence on dose-rate of the absorbed dose response of IPs was experimented,then the correction coefficient about dose-rate was given in this paper. This work provides the necessary data support and technical basis for the application of the IPs to the reference radiation measurement.

关 键 词：IP板 参考辐射 剂量率依赖 

分 类 号：TL99[核科学技术—核技术及应用]