If the results of activity size distribution (AMD and GSD) depend on the ventilation rate, sampling location, and room size. why we make comparison in some papers? what is the value of measurment reating in some cases?
The activity size distribution Z is important regarding the distribution of radon progeny in respect to the three modes that Porstendoefer first introduced: Nucleation mode, Accumulation, Coarse mode. Depending on Z, the, what was traditionally called free and attached progeny, is altered. It is very difficult to measure Z because it necessitates advanced techniques, for example aerosol spectroscopy (~100 kEuro purchase) . Otherwise, other methods should be employed, such as discrimination through grids of various size values. Differentiation in Z, imposes alteration in distribution of all progeny nuclei. Monte-Carlo is a good method in that.
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