title: Automated radioxenon monitoring for the comprehensive nuclear-test-ban treaty in two distinctive locations: Ottawa and Tahiti.
abstract: In preparation for verification of the Comprehensive Nuclear-Test-Ban-Treaty, automated radioxenon monitoring is performed in two distinctive environments: Ottawa and Tahiti. These sites are monitored with SPALAX (Systeme de Prelevement d'air Automatique en Ligne avec l'Analyse des radioXenons) technology, which automatically extracts radioxenon from the atmosphere and measures the activity concentrations of (131m,133m,133,135)Xe. The resulting isotopic concentrations can be useful to discern nuclear explosions from nuclear industry xenon emissions. Ambient radon background, which may adversely impact analyser sensitivity, is discussed. Upper concentration limits are reported for the apparently radioxenon free Tahiti environment. Ottawa has a complex radioxenon background due to proximity to nuclear reactors and medical isotope facilities. Meteorological models suggest that, depending on the wind direction, the radioxenon detected in Ottawa can be characteristic of the normal radioxenon background in the Eastern United States, Europe, and Japan or distinctive due to medical isotope production.
authors.affiliation: Radiation Protection Bureau, 775 Brookfield Rd., A.L. 6302D1, Ottawa, Ontario K1A 1C1, Canada. trevor.stocki@hc-sc.gc.ca
authors.forename: T J
authors.initials: TJ
authors.lastname: Stocki
authors.forename: X
authors.initials: X
authors.lastname: Blanchard
authors.forename: R
authors.initials: R
authors.lastname: D'Amours
authors.forename: R K
authors.initials: RK
authors.lastname: Ungar
authors.forename: J P
authors.initials: JP
authors.lastname: Fontaine
authors.forename: M
authors.initials: M
authors.lastname: Sohier
authors.forename: M
authors.initials: M
authors.lastname: Bean
authors.forename: T
authors.initials: T
authors.lastname: Taffary
authors.forename: J
authors.initials: J
authors.lastname: Racine
authors.forename: B L
authors.initials: BL
authors.lastname: Tracy
authors.forename: G
authors.initials: G
authors.lastname: Brachet
authors.forename: M
authors.initials: M
authors.lastname: Jean
authors.forename: D
authors.initials: D
authors.lastname: Meyerhof
mesh_terms: D000392:Air Movements; D001331:Automation; D004777:Environment; D004784:Environmental Monitoring / Q000379:methods*; D009689:Nuclear Warfare; D009864:Ontario; D011114:Polynesia; D011847:Radioactive Fallout / Q000032:analysis*; D012016:Reference Values; D014980:Xenon Radioisotopes / Q000032:analysis
chemical_list: D011847:Radioactive Fallout; D014980:Xenon Radioisotopes