CONTINUOUS MEASUREMENTS OF OUTDOOR 222Rn CONCENTRATIONS FOR THREE YEARS AT ONE LOCATION IN COLORADO
- 1 April 1999
- journal article
- research article
- Published by Wolters Kluwer Health in Health Physics
- Vol. 76 (4) , 418-420
- https://doi.org/10.1097/00004032-199904000-00011
Abstract
Measurements were made of 222Rn concentrations outdoors in Ft. Collins, Colorado, using a continuously sampling scintillation flask between January 1993 and December 1995. These data were analyzed for hourly, daily, and seasonal variations. The average 222 Rn concentration at I m above the ground was 18 ± 10 Bq m−3 with a geometric mean of 15 Bq m−3 and a geometric standard deviation of 1.7. Hourly averaged data indicated a diurnal pattern with the outdoor 222Rn concentration reaching a maximum in the early morning between 4:00 a.m. and 6:00 a.m. and a broad minimum between 1:00 p.m. and 4:00 p.m. in the afternoon. An analysis also indicated that the outdoor 222Rn concentrations were consistently lowest during the spring (March and April) and highest during the late summer (July–September).Keywords
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