Abstract
The problem of determining the 222Rn concentration in air from γ-ray spectra of radon progeny is solved using the aerosol filters method. The systematic error of the method due to incomplete collection of radon progeny is determined. It is shown that, when comparing the filter activity to the analytical calculation, the use of a 20-cm-diameter 20-cm-tall NaI(Tl) crystal and a 4−π geometry makes it possible to measure radon concentration with an accuracy of 20-30%.
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