Radon adsorption by activated charcoal collectors is known to be largely affected by temperature and relative humidity. Quantitative models are, however, still needed for accurate radon estimation in a variable environment. The following abstract is from a paper in the Journal of Environmental Radioactivity – introducting a temperature calibration formula based on the gas adsorption theory to evaluate the radon concentration in air from the average temperature, collection time and liquid scintillation count rate. View the full paper.
Journal of Environmental Radioactivity, Volume 102, Issue 1, January 2011, Pages 60-63.