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Simultaneous measurements of Radon, Thoron, and equilibrium equivalent concentrations in family house-

Simultaneous indoor measurements of radon, thoron and equilibrium equivalent concentrations, by three different continuous radon monitors in real ambient conditions, were performed and compared during two weeks period. Radon concentrations varied from 153 Bq m-3 to 870 Bq m-3 with variations of thoron concentrations in the range (2.17-219) Bq m-3. Obtained arithmetic means of equilibrium equivalent radon and thoron concentrations were (130 +/- 50) Bq m- 3 and (23 +/- 18) Bq m-3, respectively. The inter-comparison of active radon devices was focused on consistency of results between themselves and the influence of environmental conditions on the behavior of each detector system. The obtained statistically significant correlation between the results of used monitors, validates them for application in radon diagnostic measurements as the first step in radon remediation and dose assessment.

radon ; thoron ; equilibrium equivalent radon concentration ; equilibrium equivalent thoron concentration

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