Natural Radioactivity of Igneous Rocks

Eight samples were collected from three different locations: Bardbizin Mountain, Kanishilana and Rubarok area around the Sidakan district in the northeastern of Kurdistan region, Iraq. The studied samples measured by using gamma-ray spectrometry, planar HPGe detector with an active area of 100 mm2, with an energy resolution of 0.520 keV at the 122 keV Co-57 line and NaI(Tl) Scintillation detector 2×2 inch, with an energy resolution of 11.3 % at the 662 keV Cs-137 line. Activity concentrations of each of U-238 (Ra-226), Th-232 (Ac-228), Cs-137, and K-40, radionuclides were measured, Along the study area the average value of radium equivalent activities, absorbed dose rate,Indoor and outdoor annual effective dose,The average value of external and internal hazard indices were calculated.... Mehr