Abstract:
:A simple passive sampler for 222Rn with up to 24-hr integration times can be constructed by using a diffusion barrier to regulate the effective sampling rate of an ambient temperature activated carbon bed. The diffusion element serves to make sampler performance relatively independent of the properties of the type of carbon used. Satisfactory results are obtained if the total effective sample volume is kept well below the equivalent air volume of the activated carbon bed. The influence of various temperature and Rn profiles on the sampler's performance have been examined by experiment and by simulation. The amount of Rn adsorbed may be measured by gamma spectroscopy, by outgassing into an alpha scintillation flask, or by desorption into a liquid scintillator. In the latter case, a sensitivity of 0.2 pCi l-1 is obtainable for 24-hr exposures.
journal_name
Health Physjournal_title
Health physicsauthors
Prichard HM,Mariën Kdoi
10.1097/00004032-198506000-00007subject
Has Abstractpub_date
1985-06-01 00:00:00pages
797-803issue
6eissn
0017-9078issn
1538-5159journal_volume
48pub_type
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