title: The variation of radon exhalation rates from building surfaces of different ages.
abstract: Standardized activated charcoal canisters (according to the U.S. EPA) have been used to collect radon exhaled from concrete surfaces covered with thin plaster (categorically different from thick plaster) of 32 buildings of different ages (0.5-31 y) in Hong Kong. Concrete surfaces covered with thin plaster is the commonest wall configuration in Hong Kong. The canisters are analyzed using gamma spectroscopy to obtain the radon exhalation rates. The results show that the radon exhalation rate decreases with the building age.
authors.affiliation: Department of Physics and Materials Science, City Polytechnic of Hong Kong, Kowloon.
authors.forename: K N
authors.initials: KN
authors.lastname: Yu
authors.forename: T F
authors.initials: TF
authors.lastname: Chan
authors.forename: E C
authors.initials: EC
authors.lastname: Young
mesh_terms: D016902:Air Pollution, Indoor / Q000009:adverse effects / Q000032:analysis*; D055592:Biophysical Phenomena; D001703:Biophysics; D006723:Hong Kong; D006798:Housing; D006801:Humans; D011829:Radiation Dosage; D011886:Radon / Q000009:adverse effects / Q000032:analysis*; D013997:Time Factors
chemical_list: D011886:Radon