radioactive equilibrium


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ra·di·o·ac·tive e·qui·lib·ri·um

a situation (not a true equilibrium) in which a particular atom is being produced by the radioactive breakdown of a precursor while it is itself breaking down, the two breakdowns matching so that over a period of time the ratio of radioactivity of product and precursor is constant.
References in periodicals archive ?
Also the inverse dependence between unattached fraction factor and radioactive equilibrium factor was determined.
The values of radioactive equilibrium factor altered from 0.33 to 0.65, calculated average value is 0.39[+ or -]0.03.
The values of radioactive equilibrium factor altered from 0.15 to 0.50, and the average value was 0.35[+ or -]0.03.
As it was mentioned before with the increase of aerosol particles concentration the radioactive equilibrium factor increases too.
Having smoked in the accommodation the aerosol particles concentration in the air has increased, which conditioned the increase of average value of radioactive equilibrium factor till 0.72[+ or -]0.06 and the increase of average value of unattached fraction factor till 0.03[+ or -]0.01.
At the same time the radioactive equilibrium factor was increasing, its values reached 0.6-0.7, and in some cases even about 0.8-0.9.
As it is seen in figure 6, there is an inverse dependence between radioactive equilibrium factor and unattached fraction factor.
Usual repeated value of radioactive equilibrium factor is 0.3-0.4.
The seasonal average values of the radioactive equilibrium factor in the premises are presented in Figure 8.
Figure 8 shows, that the values of radioactive equilibrium factor are the highest in winter and the lowest in summer.
The obtained measurement values of radioactive equilibrium factor are similar to the values calculated in other European countries.
The average value of measured radioactive equilibrium factor under natural conditions was 0.35[+ or -]0.03, at the same time the value in smoked premises often reached 0.7-0.8, therefore there is a higher possibility to inhale radon progeny and damage organism in the smoked premises.