Calculation and measurement of migration coefficient of radon under laboratory conditions |
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| Authors: | LE Ren-Chang WANG Xiao-Qin |
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| Affiliation: | 1. Department Epidemiology of Health Care and Community Health, Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany;2. German Center for Neurodegenerative Diseases (DZNE), Ellernholzstr. 1-2, Greifswald 17487, Germany;1. Department of Nursing and Midwifery, University of Limerick, Limerick, Ireland;2. Department of Psychology, University of Limerick, Limerick, Ireland;3. Health Education Research Unit, Laboratoire ACTé, ESPE Clermont-Auvergne, Université Blaise Pascal, 36 Avenue Jean Jaurès CS 20001, Chamalières Cedex 63407, France;4. Department of Education and Professional Studies, University of Limerick, Limerick, Ireland;1. College of Pharmacy, Dongguk University, Gyeonggi 10326, Republic of Korea;2. Department of Pharmaceutical Engineering, Inje University, Gyeongnam 50834, Republic of Korea;3. College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea;1. Research Scholar, Dept. of ISE, BMSCE, Faculty, Dept. of ISE, JSSATE, Bangalore-560061, Karnataka, INDIA;2. Associate Professor, Dept. of ISE, BMSCE, Bangalore -560019, Karnataka, INDIA |
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| Abstract: | Under laboratory conditions (i.e. a sealed system in which the temperature may vary according to air temperature), the migration of radon in upward, downward and horizontal directions has been investigated. After a period of accumulation, the spatial distribution profile of radon was drawn on the basis of the experimental data. The profile showed whorl-shape with bigger ends. The longer the accumulation time, the bigger the whorl end, and the higher the radon concentration is. By fitting the experimental data by least-square statistical method, we find that the distributions of radon follow negative exponential functions in the upward, downward and horizontal directions. However,exponents for the three directions are not exactly identical. The upward migration is more effective than the downward one and both upward and downward migrations are more effective than the horizontal one. |
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| Keywords: | Radon Migration coefficient Diffusion coefficient |
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