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- Title
An estimation of Canadian population exposure to cosmic rays.
- Authors
Jing Chen; Rachel Timmins; Kyle Verdecchia; Tatsuhiko Sato
- Abstract
Abstract The worldwide average exposure to cosmic rays contributes to about 16% of the annual effective dose from natural radiation sources. At ground level, doses from cosmic ray exposure depend strongly on altitude, and weakly on geographical location and solar activity. With the analytical model PARMA developed by the Japan Atomic Energy Agency, annual effective doses due to cosmic ray exposure at ground level were calculated for more than 1,500 communities across Canada which cover more than 85% of the Canadian population. The annual effective doses from cosmic ray exposure in the year 2000 during solar maximum ranged from 0.27 to 0.72 mSv with the population-weighted national average of 0.30 mSv. For the year 2006 during solar minimum, the doses varied between 0.30 and 0.84 mSv, and the population-weighted national average was 0.33 mSv. Averaged over solar activity, the Canadian population-weighted average annual effective dose due to cosmic ray exposure at ground level is estimated to be 0.31 mSv.
- Subjects
JAPAN; COSMIC rays; PHYSIOLOGICAL effects of ionizing radiation; CANADIANS; ESTIMATES; RADIATION exposure; RADIATION doses; POPULATION health; JAPAN. Atomic Energy Agency; HEALTH
- Publication
Radiation & Environmental Biophysics, 2009, Vol 48, Issue 3, p317
- ISSN
0301-634X
- Publication type
Article
- DOI
10.1007/s00411-009-0226-z