147 Pm源辐射场外推电离室扰动修正因子测定  

The Perturbation Correction Factor Determination of Extrapolation Chamber in147 Pm Radiation Field

作　　者：吴琦 李德红[2] 黄建微[2] 郝艳梅[2] 周青芝[1] WU Qi;LI De-hong;HUANG Jian-wei;HAO Yan-mei;ZHOU Qing-zhi(School of nuclear science and technology,University of South China,Hengyang Hunan 421001,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [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3期518-521,共4页Nuclear Electronics & Detection Technology

摘　　要：为了实现β射线辐射场组织等效材料吸收剂量准确测量.对147Pm源辐射场中外推电离室灵敏体积侧壁对β射线干扰的修正因子进行测定。运用MC模拟计算出当极间距为1mm时,修正因子的模拟结果为1.00255,与ISO参考值相差0.06%。同时,提供了一种简便的修正因子计算方法,并利用此法实验测量了当极间距为1.5mm时,修正因子为1.00255,与ISO参考值相差0.04%。结果表明:MC法在电离辐射领域的实用性;该修正因子的简便计算方法是可行的。In order to achieve accurate measurement of the absorbed dose of beta radiation,the correction factor for the perturbation of the beta-particle flux density by the side wall of the extrapolation chamber in 147 Pm radiation field is measured.The result of simulation,when cavity length is 1 mm,is 1.00255,which is 0.04%difference from ISO reference value.At the same time,a simple and convenient way of calculating the correction factor is provided.Using this method,to measure the correction factor k pe through the experiment is 1.00255 when the cavity length is 1.5 mm,which is 0.04%different from the ISO reference value.The above results indicate that the practicality of the Monte Carlo method in the field of ionizing radiation and the simple calculation method of the correction factor mentioned in the paper is feasible.

关 键 词：147Pm源 外推电离室 MC模拟 修正因子kpe 

分 类 号：TB98[一般工业技术—计量学]