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

摘要

Gamma ray spectra of natural radioactivity from 238 U- and 232 Th series and from 40 K 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 226 Ra, 232 Th and 40 K radionuclides, Radium equivalent activities (Ra eq ), external and internal hazard indices ( H ext , H int ), external and internal level indices ( I γ , I α ), 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.