氡通过不同滤膜的扩散系数测量研究  

Radon Diffusion Coefficient Measurement in Various Membranes

作　　者：李文静[1] 袁久林 单健[1] 肖拥军[1] 刘攀[1] LI Wen - jing YUAN Jiu - lin SHAN Jian XIAO Yong - jun LIU Pan(Institute of Nuclear Science and Technology, University of South China, ttengyang 421001 ,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]山东省核与辐射安全监测中心,山东济南250117

出　　处：《核电子学与探测技术》2016年第11期1142-1147,共6页Nuclear Electronics & Detection Technology

摘　　要：基于气体透过滤膜的扩散原理,对应用于固体核径迹探测器累积测氡的三种滤膜在四种不同湿度下的氡扩散能力进行研究。实验结果表明:醋酸纤维滤膜和普通滤纸的扩散能力明显强于PE滤膜,更适用于固体核径迹测氡,且湿度对三种滤膜氡扩散能力的影响不明显。通过本次实验得到,醋酸纤维滤膜的扩散系数为1.46×10^(-9)m^2/s^2.59×10^(-9)m^2/s,普通滤纸的扩散系数为1.01×10^(-9)m^2/s^1.45×10^(-9)m^2/s。Based on the principle of the gas permeation through filter membranes, the paper studied the diffusion ability of three types of membranes which used in solid state nuclear track detectors for radon measuring under four different humidity range. Results show that, the diffusion ability of cellulose acetate membranes and filter papers are apparently stronger than polyethylene membranes, so they are more suitable for radon measuring in solid state nuclear track detectors, however, the effect of humidity is not significant. Finally, we obtain the diffusion coefficient of cellulose acetate membranes are from 1.46 × 10^-9m2/s tO 2.59 × 10^-gm2/s, the diffusion coefficient of filter papers are from 1.01 ×10 ^-9 m2/s to 1.45 × 10 ^-9m2/s.

关 键 词：氡浓度 滤膜 氡扩散系数 固体核径迹 湿度 

分 类 号：TQ116.46[化学工程—无机化工]