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Radiation Protection Dosimetry Advance Access originally published online on October 5, 2004
Radiation Protection Dosimetry 2004 112(3):449-453; doi:10.1093/rpd/nch407
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Radiation Protection Dosimetry Vol. 112, No. 3 © Oxford University Press 2004; all rights reserved

Scientific Note

Atmospheric radon levels in Beijing, China

Liguo Zhang1, Qiuju Guo1,* and Takao Iida2

1 Department of Technical Physics, School of Physics, Peking University, Beijing 100871, China
2 Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

* Corresponding author: qjguo{at}pku.edu.cn

The results of measurement of atmospheric radon concentration in Beijing, China, are reported. Continuous observation was performed hourly throughout 2003 to provide data on annual average radon concentration as well as the variation of radon concentration. An arithmetic annual mean value of 14.1 ± 5.5 Bq m–3 was obtained. The value was slightly higher than the world average and the national average. For the monthly average radon concentration, the maximum was 18.5 ± 5.0 Bq m–3 in November, while the minimum was 9.9 ± 4.1 Bq m–3 in May. Diurnal variation was also observed, and the average daily pattern of radon concentration consisted of a minimum in the late afternoon and a maximum in the early hours of the morning.


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