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Indoor and Built Environment, Vol. 1, No. 6, 358-362 (1992)
DOI: 10.1177/1420326X9200100609

Performance Characteristics of Different Passive Detectors in a Radon Chamber

Dariush Azimi-Garakani

Radiation Hygiene Division, Paul Scherrer Institute, Villigen, Switzerland

The performance characteristics of two types of passive radon monitors were studied by exposing them in the Paul Scherrer Institute radon chamber at 20 °C and a relative humidity of ~ 50 % to three different radon levels of approximately 40, 450 and 900 kBq h m-3, respectively. The monitors were a plastic bag radon sampler and an envelope-type radon sampler. The agree ment between the radon concentrations measured by these two monitors with those of the Lucas cell of the chamber monitoring system was within the statis tical error of ± 20%. The experiment carried out at 20 °C and a relative humidity of ~ 90% with the radon exposure level of ~ 450 kBq h m-3 showed no appreciable decrease in the measured radon concentration compared with that of the Lucas cell.

Key Words: Radon chambers • Plastic bag radon sampler • Envelope-type radon monitor • Permeability of polyethylene • Sensitivity coefficient • Relative humidity


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