Brunke, EGLabuschagne, CParker, BVan der Spuy, DWhittlestone, S2007-01-112007-06-072007-01-112007-06-072002-05Brunke, EG et al. 2002. Cape Point GAW Station Rn-222 detector: factors affecting sensitivity and accuracy. Atmospheric environment, vol 36(13), pp 2257-22621352-2310http://hdl.handle.net/10204/1374http://hdl.handle.net/10204/1374Specific factors of a baseline Rn-222 detector installed at Cape Point, South Africa, were studied with the aim of improving its performance. Direct sunlight caused air turbulence within the instrument, resulting in 13.6% variability of the calibration factor. Shading the instrument eliminated this effect. A residual temperature dependence of the calibration factor was reduced to negligible levels with an improved photomultiplier tube. A superior detector head permits field servicing of the instrument, and has reduced one component of the instrumental background by a factor of 2. The other component probably constitutes thoron emissions from the stainless steel walls. The detection limit of the instrument could be reduced from its current 33 to 20 mBq m(-3) if the thoron were to be eliminated.129916 bytesapplication/pdfenCopyright: Pergamon-elsevier science LtdRn-222 detectorRadonPhotomultiplierThoronEnvironmental sciencesMateorologyAtmospheric sciencesArticleBrunke, E., Labuschagne, C., Parker, B., Van der Spuy, D., & Whittlestone, S. (2002). Cape Point GAW Station Rn-222 detector: factors affecting sensitivity and accuracy. http://hdl.handle.net/10204/1374Brunke, EG, C Labuschagne, B Parker, D Van der Spuy, and S Whittlestone "Cape Point GAW Station Rn-222 detector: factors affecting sensitivity and accuracy." (2002) http://hdl.handle.net/10204/1374Brunke E, Labuschagne C, Parker B, Van der Spuy D, Whittlestone S. Cape Point GAW Station Rn-222 detector: factors affecting sensitivity and accuracy. 2002; http://hdl.handle.net/10204/1374.TY - Article AU - Brunke, EG AU - Labuschagne, C AU - Parker, B AU - Van der Spuy, D AU - Whittlestone, S AB - Specific factors of a baseline Rn-222 detector installed at Cape Point, South Africa, were studied with the aim of improving its performance. Direct sunlight caused air turbulence within the instrument, resulting in 13.6% variability of the calibration factor. Shading the instrument eliminated this effect. A residual temperature dependence of the calibration factor was reduced to negligible levels with an improved photomultiplier tube. A superior detector head permits field servicing of the instrument, and has reduced one component of the instrumental background by a factor of 2. The other component probably constitutes thoron emissions from the stainless steel walls. The detection limit of the instrument could be reduced from its current 33 to 20 mBq m(-3) if the thoron were to be eliminated. DA - 2002-05 DB - ResearchSpace DP - CSIR KW - Rn-222 detector KW - Radon KW - Photomultiplier KW - Thoron KW - Environmental sciences KW - Mateorology KW - Atmospheric sciences LK - https://researchspace.csir.co.za PY - 2002 SM - 1352-2310 T1 - Cape Point GAW Station Rn-222 detector: factors affecting sensitivity and accuracy TI - Cape Point GAW Station Rn-222 detector: factors affecting sensitivity and accuracy UR - http://hdl.handle.net/10204/1374 ER -