Author/Authors :
Hazrati، Sadegh نويسنده Department of Environmental Health, Faculty of Public Health, Ardabil University of Medical Sciences, Ardabil, Iran Hazrati, Sadegh , Naghizadeh Baghi، Abbas نويسنده Department of Basic Sciences, Ardabil University of Medical Sciences , , Sadeghi، Hadi نويسنده Department of Environmental Health, School of Public Health, Ardebil University of Medical Sciences, Ardebil, Iran , , Barak، Manouchehr نويسنده School of Medicine, Ardebil University of Medical Sciences, Ardebil, Iran , , Zivari، Sahar نويسنده Department of Environmental Health, School of Public Health, Ardebil University of Medical Sciences, Ardebil, Iran , , Rahimzadeh، Soheila نويسنده Ardebil Province Health Center, Ardebil University of Medical Sciences, Ardebil, Iran ,
Abstract :
Gamma rays pose enough energy to induce chemical changes that may be biologically important for the normal
functioning of body cells. The external exposure of human beings to natural environmental gamma radiation
normally exceeds that from all man-made sources combined. In this research natural background gamma dose
rates and corresponding annual effective doses were determined for selected cities of Ardebil province. Outdoor
gamma dose rates were measured using an Ion Chamber Survey Meter in 105 locations in selected districts.
Average absorbed doses for Ardebil, Sar-Ein, Germy, Neer, Shourabil Recreational Lake, and Kosar were determined
as 265, 219, 344, 233, 352, and 358 nSv/h, respectively. Although dose rates recorded for Germi and Kosar are
comparable with some areas with high natural radiation background, however, the dose rates in other districts are
well below the levels reported for such locations. Average annual effective dose due to indoor and outdoor
gamma radiation for Ardebil province was estimated as 1.73 (1.35–2.39) mSv, which is on average 2 times higher
than the world population weighted average
