Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10686713 | Journal of Environmental Radioactivity | 2005 | 17 Pages |
Abstract
As part of a long-term assessment of domestic radon in Northamptonshire, England, a batch of 50 commercially available electrets was deployed for nearly 1000 exposures, individual exposure periods ranging from one to eight weeks. Responsivity was comparable with that of recently-calibrated Durridge RAD-7 continuously-monitoring equipment. Voltage history analysis indicated mean voltage decay during manufacturers' QA assessment of 0.059 ± 0.026 V dayâ1, increasing to 0.114 ± 0.073 V dayâ1 during storage to first use and to 0.204 ± 0.49 V dayâ1 during inter-deployment storage. At a representative elevated radon concentration of 500 Bq mâ3, the resulting perturbation is 3% over a 7-day deployment; at the typical mean Northamptonshire level of 80 Bq mâ3 it approaches 22%. Each electret can be used for up to 25 measurements, which makes the technology attractive for organisational use. It is not suited for deployment by individual householders.
Related Topics
Physical Sciences and Engineering
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Authors
A.R. Denman, C.J. Groves-Kirkby, P.S. Phillips, R.G.M. Crockett, A. Woolridge, G.K. Gillmore,