| 氡在空气中长距离运移实验研究 |
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| 引用本文： | 乐仁昌,贾文懿,何志杰.氡在空气中长距离运移实验研究[J].成都理工大学学报(自然科学版),2006,33(5):536-540. |
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| 作者姓名： | 乐仁昌 贾文懿 何志杰 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金
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福建省青年科技人才创新基金
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福建省教育厅科研项目 |
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| 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.
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| 关 键 词： | 氡运移 氡运移机理 团簇 γ能谱测量 |
| 文章编号： | 1671-9727（2006）05-0536-05 |
| 收稿时间： | 2005-09-16 |
| 修稿时间： | 2005年9月16日 |
An experimental study on long distance migration of radon in the air |
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| LE Ren-chang,JIA Wen-yi,HE Zhi-jie.An experimental study on long distance migration of radon in the air[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2006,33(5):536-540. |
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| Authors: | LE Ren-chang JIA Wen-yi HE Zhi-jie |
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| Abstract: | 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). |
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