不同介质中氡运移的异常现象与α衰变  

THE ABNORMAL BEHAVIOR OF RADON MIGRATION IN DIFFERENT MEDIA AND α-DECAY

作　　者：贾文懿[1] 方方[1] 周蓉生[1] 马英杰[1] 乐仁昌[1] 王小琴[1] 

机构地区：[1]成都理工大学应用核技术与自动化工程学院,成都610059

出　　处：《成都理工学院学报》2002年第5期561-566,共6页Journal of Chengdu University of Technology

基　　金：国家自然科学基金资助项目 ( 4 96 74 2 38)

摘　　要：研究了氡在不同介质模型中的运移情况 ,实验得出 :氡及其子体在竖立的封闭空气模型中 ,运移距离大大超过 2 7m,远远超过扩散作用达到的范围 ;在空气、砾石、水和砂介质模型顶端 ,氡及其子体均呈阵发性而不是连续性变化。出现这些异常情况 ,是由于氡及其子体的产生与 α衰变有关 ,α粒子系 4He,它能与氡及其子体形成 He-Rn等团簇现象引起的。借助来自铀矿石的氡比来自液体镭源的氡具有更强的向上运移能力 ,论证了 He-Rn团簇的存在。This paper studies the behavior of radon migration in different media. The experiment results indicate that the migration distance of radon and its daughters in vertical sealed device filled in air is much farther than 27 m and greatly exceeds the range that diffusion can reach. On the top ends of the device filled in air, gravel, water and sand, radon and its daughters are characterized by erratic but not continuous features. This is because the generation of radon and its daughters relates with α-decay. α particle is 4He and can be combined with radon and its daughter to form He-Rn clusters. The presence of He-Rn cluster is verified by that the radon from uranium ore migrates upwards much more than the radon from liquid radium source.

关 键 词：氡运移 Α衰变 团簇 介质模型 形成机理 扩散作用 放射性地质勘探 

分 类 号：P631.6[天文地球—地质矿产勘探]