The Closed-Can Exhalation Method for Measuring Radon.
Results from closed-can radon exhalation experiments must be interpreted bearing the time-dependent radon diffusion theory in mind. A rapid change from the free to final steady-state exhalation rate will take place for all samples that are thin compared with the radon diffusion length. The radon gas accumulating in a closed can corresponds to a free exhalation rate only if the outer volume of air is much larger than the pore volume of the enclosed sample, or the thickness of the sample is much larger than the radon diffusion length.
Department of Radiation Physics, University of Lund, University Hospital, S 221 85 Lund, Sweden.
Christer
C
Samuelsson
closed-can method; exhalation; radon; radon diffusion