Radon daughters atmospheric electrical

Shimo, M., A Continuous Measuring Apparatus using Filter-Sampling Technique for Environmental Radon Daughters, Research Letters on Atmospheric Electricity, 4 63-70 (9184). 

Table I Comparison of Radon and Daughter Products with Aerosols and Atmospheric Electrical Characteristics in a First-floor Room. Errors Shown are the Standard Deviation Over a Five Day Period (February 1985).

The atmosphere is a good insulator but it does have a conductivity which like the ion density is not affected by the radon daughter ions. It is of interest to note that the electrical conductivity is balanced with respect to positive and negative polarity within the accuracies indicated. 

Radon daughter ions and the ionization caused by the decay chains of radon and thoron in indoor air play important roles both from the contribution made by the daughter product positive ions to internal dose and from the effects of ion-pair production on the indoor atmospheric electrical parameters. 

Wilkening, M.H., M. Kawano, and C. Lane, Radon Daughter Ions and Their Relation to Some Electrical Properties of the Atmosphere, Tellus 18 679-684 (1966). 

These radon daughter ions have electrical mobilities in the same range as ordinary atmospheric ions and the ions can be divided into a number of groups where each group has a particular mobility (Nolan, 1916 McClelland and Nolan, 1926). Bricard et al. (1966) reports measurements for five distinct mobility groups with values in the range of 0.4-2.2 cm s v for small radioactive ions in air. 

Wilkening, M.H., Kawano, M. Lane, C. (1966) Radon-daughter ions and their relation to some electrical properties of the atmosphere. Tellus, 18, 679-684. 

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