氡在空气中长距离运移实验研究  

An experimental study on long distance migration of radon in the air

作　　者：乐仁昌[1] 贾文懿[2] 何志杰[1] 

机构地区：[1]福建师范大学物理与光电信息科技学院,福州350007 [2]成都理工大学应用核技术与自动化工程学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2006年第5期536-540,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(10575022);福建省青年科技人才创新项目(2003J010);福建省教育厅项目(JA03035)

摘　　要：设计了一套可以在室内密封条件下观测氡气运移的装置。通过实验发现:氡气向上向下实测运移计数均明显大于扩散运移计数。在氡源附近,实测向下运移计数明显小于向上运移计数;在离开氡源一定距离后,则出现相反情况,即实测向下运移计数明显大于向上运移计数。采用氡团簇运移理论可以较好地解释以上实验结果。根据两组实测数据进行推导,可以得出氡在实验装置中向上运移距离分别为25.55 m和32.89 m,向下运移距离分别为76.75 m和62.79 m;实测运移距离均比理论扩散运移距离(15.08 m)大很多。An airproof device is designed to trace the migration of radon in lab. According to our experiments the authors find that at the corresponding observation positions, the radon migration counts upwards and downwards are obviously greater than the theoretic diffusion migration counts. The radon migration counts upwards near the Rn source are obviously greater than the counts downwards. The radon migration counts downwards at a distance from the source are obviously greater than the counts of upwards. This result can be explained through the mechanism of clusters migration of radon. According to the two sets of experimental data, the following results can be deduced. The longest distances which the radon moves upwards are 25.55 m and 32.89 m respectively. The longest distances that the radon moves downwards are 76.75 m and 62.79 m respectively. All these distances are much greater than the theoretic diffusion distance （15.08 m）.

关 键 词：氡运移 氡运移机理 团簇 Γ能谱测量 

分 类 号：P631.6[天文地球—地质矿产勘探]