The assessment of natural radioactivity and its associated radiological hazards and dose parameters in granite samples from South Sinai, Egypt

Gamma ray spectra of natural radioactivity from U-238-and Th-232 series and from K-40 of eight (representing 40 collected samples) granite samples collected from Saint Katherine region, South Sinai, Egypt, had been measured using a gamma-ray spectrometer with an HPGe detector. The results reported in the present article include: Specific activities (A) of Ra-226, Th-232 and K-40 radionuclides, Radium equivalent activities (Ra-eq), external and internal hazard indices (H-ext, H-int), external and internal level indices (I-gamma, I-alpha), activity utilization index (I), exposure rate (ER) and other important parameters to the subject. The results have been presented in table graphs with the permissible maximum limits. (C) 2014, The Egyptian Society of Radiation Sciences and Applications. Production and hosting by Elsevier B.V.