Abstract
The emanation of gases from the walls, floors, and ceilings is the main source of radon (Rn) and thoron (Tn) in enclosed rooms. The bulk of terrestrial construction materials contain gas in their pores in concentrations 1,000−10,000 times higher than those in the atmosphere. This high concentration results in a considerable radon/thoron concentration difference between the construction materials and ambient air. In this study, indoor radon, thoron, and their progeny concentrations, in Bangalore Metropolitan households, were measured using a significant number of dosimeters.
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