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www.atmos-meas-tech-discuss.net/3/675/2010/
doi:10.5194/amtd-3-675-2010
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Comparison of one- and two-filter detectors for atmospheric 222Rn measurements
1Institute of Environmental Geosciences, University of Basel, Bernoullistr. 30, 4056 Basel, Switzerland
2Federal Office for Radiation Protection (BfS), Willy-Brandt-Str. 5, 38226 Salzgitter, Germany
3Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia
Abstract. Parallel monitoring of 222Rn and its short-lived progeny (218Po and 214Pb) were carried out from November 2007 to April 2008 close to the top of the Schauinsland mountain, partly covered with forest, in South-West Germany. Samples were aspired from the same location at 2.5 m above ground level. We measured 222Rn with a dual flow loop, two-filter detector and its short-lived progeny with a one-filter detector. A reference sector for events, facing a steep valley and dominated by pasture, was used to minimize differences between 222Rn and progeny-derived 222Rn activity concentrations. In the two major wind sectors covered by forest to a distance between 60 m and 80 m towards the station progeny-derived 222Rn activity concentration was on average equal to 87% (without precipitation) and 74% (with precipitation) of 222Rn activity concentration.
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Notice on Discussion StatusCitation: Xia, Y., Sartorius, H., Schlosser, C., Stöhlker, U., Conen, F., and Zahorowski, W.: Comparison of one- and two-filter detectors for atmospheric 222Rn measurements, Atmos. Meas. Tech. Discuss., 3, 675-695, doi:10.5194/amtd-3-675-2010, 2010. Bibtex EndNote Reference Manager XML
