Reviews methods for the measurement of the activity concentrations of radon-222 daughters in air. Describes method which enables activity concentrations as low as 0.05 pc i/l of ra a to be measured with simple readily transportable equipment. The method presented here also measures RaB (214 Pb) and RaC (214Bi) activity concentrations and working levels with improved precision compared with established methods.
The measurement of low concentrations of radon-222 daughters in air with emphasis on RaA assessment.
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Year:
1978
Bibliographic info:
Phys. Med. Biol. vol. 23 no. 1. p55-65