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| Effect of atmospheric pressure on the radon exhalation from the medium surface |
| LIU Yan1, ZHANG Jimian1, YUAN Jiulin2, SHAN Jian3, YU Jinwei1 |
1. Tianjin Municipal Center for Disease Control and Prevention, Tianjin 300011 China;
2. Radiation Management Environment Station of Shandong Province;
3. Institute of Nuclear Science and Technology, University of South China |
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Abstract Objective To acquaint the effect of atmospheric pressure changes on radon exhalation from the medium surface throughout a day.Methods Based on the double-room and open-loop balance method, radon exhalation rates in every 30 minutes were measured on a radon exhalation rate reference standard device throughout a day. The effect of atmospheric pressure on radon exhalation rate was analyzed based on the timely values of radon exhalation rate and atmospheric pressure. The change rate of the radon exhalation rate in one day was plotted and compared with the change rule of the in one day.Results Radon exhalation rate from the surface of the measured sample varied from 1.5912 Bq·m-2·s-1 to 1.9509 Bq·m-2·s-1 throughout a day. The high radon exhalation rate appeared in the low pressure range.Conclusion The radon exhalation from the surface of medium increases with the decrease of atmospheric pressure, but the decrease of radon exhalation was not obvious when the pressure increases.
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Received: 07 May 2018
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