【作者】 乐仁昌； 何志杰； 卢宇； 叶全意； 洪锦泉； 蔡思静； 周宝庸； 陈健俤；

【Author】 LE Renchang HE Zhijie LU Yu YE Quanyi HONG Jinquan CAI Sijing ZHOU Baoyong CHEN Jiandi (School of Physics and Opo-Electronics of Technology,,Fujian Normal University,Fuzhou 350007,China)

【机构】 福建师范大学物理与光电信息科技学院；

【摘要】 氡气运移的研究成果表明:氡气的运移具有方向性的。本文从实验入手,采用静态、累积、高灵敏度的测氡方法,对氡累积水平扩散分布进行了测量。采用最小二乘法拟合方法对不同温度条件下氡及其子体的水平扩散系数进行了计算;实验研究结果表明:氡及其子体的水平扩散系数与温度的相关系数为0.92,两者呈线性正相关关系;在恒温(30℃)条件下的实测水平扩散系数为0.049cm2s-1;要使氡在空气中的水平扩散系数的达到经典值0.1cm2s-1,其环境温度应达到40℃以上。更多还原

【Abstract】 Various experiments to measure radon migration coefficients indicated that the migration of radon and its daughters is directional. The horizontal diffusion data of radon in the air has been measured and studied in laboratory conditions using the accumulative radon-measurement method in a static state with high sensitivity. The mathematical calculation to obtain horizontal diffusion coefficients of radon under the condition of different temperature is done by fitting a difference equation to the measured radon diffusion data. The linear positive correlation, which the correlation coefficient is 0.92, between horizontal diffusion coefficients of radon and their diffusion temperatures has been obtained. The horizontal diffusion coefficient of radon is 0.049cm2s-1 under the condition of constant temperature of 30℃. To obtain the typical value 0.1cm2s-1 of radon diffusion coefficient, the diffusion condition of above 40℃ can be deduced.更多还原