title: Preliminary results of simultaneous radon and thoron tests in Ottawa.
abstract: Ottawa is the capital city of Canada. In the previous cross Canada radon survey, Ottawa was not included. There is great interest to know radon level as well as thoron concentration in Ottawa homes. Therefore, radon/thoron discrimination detectors developed at the National Institute of Radiological Sciences in Japan were deployed in 93 houses for a period of 3 months. As expected, thoron is present in Ottawa homes. Radon concentrations ranged from 8 to 1525 Bq m(-3) while thoron concentrations varied from 5 to 924 Bq m(-3). The arithmetic mean of radon and thoron concentrations were found to be 110 +/- 168 and 56 +/- 123 Bq m(-3), respectively.
authors.affiliation: Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Canada K1A 1C1.
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Shinji
authors.initials: S
authors.lastname: Tokonami
authors.forename: Atsuyuki
authors.initials: A
authors.lastname: Sorimachi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Takahashi
authors.forename: Renato
authors.initials: R
authors.lastname: Falcomer
mesh_terms: D002170:Canada; D006798:Housing; D011834:Radiation Monitoring; D011886:Radon / Q000032:analysis*; D013910:Thorium / Q000032:analysis*
chemical_list: D013910:Thorium; D011886:Radon