Health Physics · 1989 · 11 citations · 0 references
EngineeringChemistryEnvironmental SciencesAnalytical ChemistryRadiation DetectionRadiation MeasurementActivated CharcoalAir Pollution MeasurementDetector TechnologyEnvironmental Analytical ChemistryRadiation DetectorsScintillation DetectorsAir Humidity EffectsAir Quality Monitoring InstrumentsLiquid Scintillation CountingLiquid Scintillation SpectroscopyRelative Humidity EffectsScintillationScintillation DetectionSensitivity
An inexpensive, easy-to-use detector for measuring airborne 222Rn based on 222Rn diffusion and absorption in activated charcoal is presented. The detector uses chemical extraction and liquid scintillation for measurement of the 222Rn concentration, is designed to be insensitive to temperature and humidity effects, and obtains sensitivity levels of 675 CPM (Bq L-1)-1 [25 CPM (pCi L-1)-1] at room temperature.