A portable bronchial dosimeter for radon progenies
- City Univ. of Hong Kong, Kowloon (Hong Kong)
A dosimeter for radon progeny has been proposed consisting of a single sampler with one 400-mesh wire screen and one filter, which is considered as a model for a portable bronchial dosimeter. During the sampling, air is drawn through the screen and the filter at a face velocity of 12.0 cm s{sup {minus}1}. After sampling, measurements of the screen and the filter are made at the same time through gross alpha counting. The annual effective dose (E, in mSv y{sup {minus}1}) is calculated employing the exposure to radon progenies in the tracheobronchial (T-B) region. The dosimeter can be used in conjunction with an activated charcoal canister for the measurement of the radon gas concentration to yield the effective dose conversion factor (DCF, in mSv y{sup {minus}1} per Bq m{sup {minus}3}). These have laid the foundation to the design of a portable bronchial dosimeter. The validity of the dosimeter has been tested through measurements of annual effective dose and the effective dose conversion factor in different environments.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 659014
- Journal Information:
- Health Physics, Journal Name: Health Physics Journal Issue: 2 Vol. 75; ISSN HLTPAO; ISSN 0017-9078
- Country of Publication:
- United States
- Language:
- English
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