MC法模拟计算石墨空腔电离室壁修正因子  

Simulation of Graphite Cavity Ionization Chamber Wall Correction Factor by MC Method

作　　者：任国月 吴金杰[2] 王波[1,2] 白占国 REN Guo-yue;WU Jin-jie;WANG Bo;BAI Zhan-guo(Hebei University of Science and Technology,Shijiazhuang 050000,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]河北科技大学,石家庄050000 [2]中国计量科学研究院,北京100029

出　　处：《核电子学与探测技术》2020年第1期115-118,共4页Nuclear Electronics & Detection Technology

基　　金：环境水平X射线空气比释动能测量方法研究,25-AKY1707。

摘　　要：为探讨石墨空腔电离室壁修正因子的确定方法,本文利用MC模拟计算方法对美国国家空气比释动能基准组中的NIST10cm3和NIST30cm3球形石墨空腔电离室的壁修正因子进行了计算模拟.实验采用60Co和137 Csγ作为射线源,进行“等效壁厚”模拟以及MC直接计算模拟.两种模拟方法得到的计算结果与NIST发布的值相差均在0.1%内.本次实验的结论为“等效壁厚”模拟方法与直接计算模拟方法经验证均能作为壁修正因子的确定方法.In order to explore the method for determining the correction factor of the graphite cavity ionization chamber w all,in this paper,the MC simulation method is used to calculate the wall correction factor of NISTlOcm3 and NIST30cm3 spherical graphite cavity ionization chambers in the national air kerma benchmark group.Co60 and Cs13/7 were used as radiation sources in the experim ent,Performing“equivalent wall thickness”simulation and MC direct calculation simulation.The calculated results of the two simulation methods are within 0.1%of the values published by NIST.The conclusion of this experiment is that both the“equivalent wall thickness”simulation method and the direct calculation simulation method can be verified as the determination method of the wall correction factor.

关 键 词：等效壁厚蒙卡模拟 蒙卡直接计算模拟 壁修正因子 EGSNRC 

分 类 号：TB98[一般工业技术—计量学]