Characteristics of thoron and thoron progeny in Canadian homes
| Autor: | Shinji Tokonami, Jing Chen, Atsuyuki Sorimachi, Deborah Moir |
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| Rok vydání: | 2010 |
| Předmět: |
Canada
Isotopes of radon Radiation Radon Daughters Chemistry business.industry Indoor air Biophysics chemistry.chemical_element Radon gas Radon respiratory tract diseases Radiation Monitoring Environmental chemistry Housing Equilibrium factor Thoron Progeny Geometric standard deviation Nuclear medicine business Probability General Environmental Science |
| Zdroj: | Radiation and Environmental Biophysics. 50:85-89 |
| ISSN: | 1432-2099 0301-634X |
| DOI: | 10.1007/s00411-010-0338-5 |
| Popis: | Naturally occurring isotopes of radon in indoor air are identified as the second leading cause of lung cancer after tobacco smoking. Radon-222 (radon gas) and radon-220 (thoron gas) are the most common isotopes of radon. While the radon equilibrium factor is well established, the equilibrium factor between thoron progeny and thoron gas is still not well known. Thoron gas and progeny concentrations were determined in the lowest floors of 138 Canadian homes simultaneously. While thoron gas was only detectable in about 52% of the homes, thoron progeny concentrations were measured in every home surveyed. Thoron concentrations, thoron progeny concentrations, and the equilibrium factors varied widely and were log-normally distributed. With a 3 months simultaneous measurement of thoron and thoron progeny concentrations, the equilibrium factor was determined to be 0.024 with a geometric standard deviation of 2.7. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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