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By Daniel J. Steck, David Harrison, Said Rahman and Rad Elec Inc


Radon progeny measurements can improve dose estimates based on radon gas measurements alone. The airborne activity-size distribution ratio affects the available dose rate per unit radon. Measurements of surface deposited alpha activity and radon concentration can be used in a semi-empirical model to estimate the equilibrium ratio, the free fraction and airborne dose rate. Since residential atmospheres are dynamic, several measurement approaches, including electret ion chamber and track registration techniques, are being studied to develop passive, integrating detectors. Preliminary tests show good correlation between surface deposited activity or energy, airborne progeny concentrations and dose rate. Tests are underway to assess the performance in other home environments

Year: 2013
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