MEASUREMENT OF ARTIFICIAL RADIOACTIVITY IN THE ATMOSPHERE AT OTTAWA, CANADA

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Canadian Journal of Physics (Canada)

DOI:https://doi.org/10.1139/p58-014· OSTI ID:4337966

Terentiuk, F

In recent years there has been considerable interest in the artificial radioactivity in the atmosphere originating from atomic and thermonuclear explosions. For the past year daily measurements of radioactivity have been made at Ottawa. The sampling times corresponded to air volumes of 425 cubic metric and 2000 cubic meters, respectively. Filters were kept for a period of 3 days before measurements were made in order to permit natural activity resulting from daughter products or radon and thoron to decay to a negligible value. Measurements of the gross beta activity from the filters were made directly with endwindow Geiger tubes. Filters showing considerable initial radioactivity were measured at intervals of a few days in order to obtain the rate of decay of the activity. It was hoped that the data obtained would make it possible to fix the date of the explosion responsible for the filter activity but the fixing of dates was very uncertain. (A.C.)

• Research Organization: National Research Council, Ottawa, Canada
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-005751
• OSTI ID: 4337966
• Journal Information: Canadian Journal of Physics (Canada), Journal Name: Canadian Journal of Physics (Canada) Vol. Vol: 36; ISSN CJPHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ATMOSPHERE
BETA PARTICLES
DECAY
FILTERS
GEIGER-MUELLER COUNTERS
MEASURED VALUES
NUCLEAR EXPLOSIONS
PHYSICS
RADIOACTIVITY
RADON
SAMPLING
THERMONUCLEAR REACTIONS
VOLUME
WINDOWS