氡在聚合物膜中渗透系数的测定  

Determination of Radon Permeability Through Polymer Films

作　　者：刘茹佳 李军 丘寿康[1] 程芬[1] 陈颖[1] 唐泉[1] 

机构地区：[1]南华大学核科学技术学院,衡阳421001 [2]新疆辐射环境监督站,乌鲁木齐830000

出　　处：《核电子学与探测技术》2016年第2期189-192,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11275094)资助;中国科学院战略性先导科技专项资金(XDA10010500)资助

摘　　要：为向江门中微子实验用膜的选择提供参考,研究了一种测定氡在聚合物膜中渗透系数的方法,设计加工出可利用闪烁液进行采样的膜渗透采样装置,并测量了不同类型聚合物膜的渗透系数。实验结果表明:膜渗透采样装置的本底及密闭性符合实验要求;聚合物膜表面氡析出达到稳定状态至少需要18d;PVC膜的氡渗透系数最低。To provide a reference for selection of polymer films in Jiangmen neutrino experiments,a method for measuring the permeability of radon through polymer films has been developed. A device based on the measurement of liquid scintillationhas also been produced,and various polymefoilsof the radon diffusion coefficient were tested. The results show that： the background and air impermeability of the device mainly accorded the prospective desire; it takes at least 18 days for polymer films after establishing stationary radon diffusion through the sample; the permeability coefficient of PVC film is the lowest.

关 键 词：液体闪烁计数 氡 渗透系数 聚合物膜 

分 类 号：O613.16[理学—无机化学]