Radon equilibrium factor and aerosols

Equilibrium factor values (F) were measured in the NRPB radon chamber and corresponding track densities of the bare (D) and diffusion (D0) LR-115 nuclear track detectors were determined. The obtained empirical function, F(DD0), has agreed with the theoretical one, that had been derived by using concentration equations for the radon and its short-lived decay products. Measurements of the detector track densities and aerosol concentrations (ca) made possible a fitting of the DD0(ca) function, that after introducing into the F(DD0) gave a relationship for aerosol concentration, F(ca). So, it was possible to assess a radon dose equivalent if concentrations of radon and aerosols in the air were known (measured).