| Gao Peng,Wang Yi,Song Zhiyan,Sun Xueyun.Study on outdoor radon and its progeny concentration level and variation pattern in Beijing area[J].Chinese Journal of Radiological Medicine and Protection,2020,40(9):698-701 |
| Study on outdoor radon and its progeny concentration level and variation pattern in Beijing area |
| Received:January 07, 2020 |
| DOI：10.3760/cma.j.issn.0254-5098.2020.09.008 |
| KeyWords:Radon concentration Radon progeny concentration Continuous measurement Equilibrium factor |
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| Abstract:: |
| Objective To understand the concentration level of radon and its progeny in outdoor air in Beijing area and to analyze the related variation pattern and influencing factors. Methods The continuous measurement device for radon and its progeny concentration is used for the one-year continuous measurement at three points in different directions in Beijing area. Results The annual concentration average value was (10.9±4.9) Bq/m3 for radon and (5.8±3.4) Bq/m3 for its progeny (equilibrium equivalent radon concentration EEC) in outdoor air in Beijing with the annual average value of 0.52±0.19 for equilibrium factor F. Clear diurnal variations of the concentrations of radon and its progeny was observed. Conclusions The result of one-year continuous measurement show that the concentrations of radon and its progeny in the outdoor air in Beijing area are close to the world average, lower than the typical values in China given by grab sampling measurement. The daily variation pattern of radon and its progeny concentrations is similar to those at home and abroad. The seasonal variation pattern features local climate in Beijing. |
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