Vol. 9, No 1, 2012 pp. 19 - 26
UDC 613.648:546.296:114

INDOOR AND OUTDOOR AMBIENT RADIATION LEVELS IN KEFFI, NIGERIA
A.A Sadiq1, E.H Agba2
1Department of Physics, Nasarawa State University, Keffi, Nigeria
sadiqulkafawi4real@yahoo.co.uk
2Department of Physics, Benue State University, Makurdi, Nigeria

Abstract. This research paper investigates and presents the ambient radiation levels (in mSv/yr) in Keffi, Nigeria. A halogen-quenched GM detector (Inspector Alert Nuclear Radiation Monitor SN: 3544) was used for the purpose of the study. Some areas were found to have a relatively higher indoor dose, while others had a higher outdoor dose equivalent rate ranging from 0.81 to 1.27mSv/yr and 0.21 to 0.28mSv/yr for the outdoor and the indoor radiation levels respectively. The mean outdoor and indoor radiation levels were found to be 0.25 and 1.08mSv/yr respectively, and are in good approximation with the internationally approved annual dose limits for members of the public (1mSv/yr). The outdoor and indoor ratio was computed to be 23.1%.
Key Words: equivalent dose rate, radon, indoor, outdoor
NIVOI RADIJACIJE U ZATVORENOM I NA OTVORENON PROSTORU U MESTU KEFFI, NIGERIJA
Ovo istraživanje ima za cilj da predstavi nivoe radijacije u okruženju (mSv/yr) u mestu Keffi, Nigerija. GM halogeni detektor (Inspector Alert Nuclear Radiation Monitor SN: 3544) je korišćen u ovom istraživanju. U nekim delovima su utvrđeni relativno visoke vrednosti u zatvorenim prostorima, dok sun a drugim mestima doze bili u rasponu od 0.81 do 1.27mSv/yr i od 0.21 do 0.28mSv/yr za nivo radijacije na otvorenom i u zatvorenom prostoru, tim redosledom. Srednja vrednost nivoa radijacije u zatvorenom prostoru i na otvorenom bila je 0.25 i 1.08mSv/yr tim redosledom, što je u skladu sa međunarodno prihvaćenim godišnjim vrednostima za stanovništvo (1mSv/yr). Odnos na otvorenom i u zatvorenom prostoru bio je 23.1%.
Ključne reči: odnos ekvivalentnih doza, Radon, zatvoreni prostor, otvoreni prostor