摘要
为选出适用于我国江门中微子实验的氡屏蔽聚合物膜材料,研究了稳态时利用液体闪烁计数器测定聚合物薄膜氡渗透系数的装置和方法。实验测得了尼龙膜和聚乙烯膜的氡渗透系数并与文献中的数值范围进行了对比,测定结果表明,常用研究材料中尼龙膜的氡渗透系数较低,对降低氡浓度有显著效果。此外实验验证了薄膜氡渗透系数测定的主要影响因素,包括简化计算的方法、系统达到稳态的时长、环境湿度和温度等,并对进一步标准化测定聚合物薄膜的氡渗透系数提出了参考意见。
To choose suitable polymer films for Juno experiment,the determination device and method for the radon permeability coefficient were studied.The radon permeability coefficients of nylon and polyethylene were tested by liquid scintillation counter under the steady state.Comparing tested values with literature values,the results show that the radon permeability coefficient of nylon is lower in co mmon materials,having a significant effect on reducing radon concentration.Moreover,the main influence factors for measurement were obtained,including the simplified calculation method,the time of the system reaching stable state,environmental humidity and temperature,and the references for standardizing the determination of radon permeability coefficient of polymer films were provided.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2017年第9期1698-1703,共6页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(11275094)
中国科学院战略性先导科技专项资助(XDA10010500)
关键词
氡
渗透系数
扩散系数
radon
permeability coefficient
diffusion coefficient
