| Assessment of Natural Radioactivity and Associated Radiation Hazards in pegmatite as a building material, Hafafit area, Southeastern Desert of Egypt |
| Paper ID : 1016-ICEE (R3) |
| Authors: |
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Adel H El-Afandy1, Samia Taha *2, Mohamed Galal3, S. M. El Minyawi2, H. A Sallam4 1Nuclear Materials Authority 2Physics Department, Faculty of Science / Al Azhar University, Girls’ branch, Egypt 3Nuclear Materials Authority, El Maadi P.O. Box 530, Cairo, Egypt 4Physics Department, Faculty of Science / Al Azhar University, Girls’ branch, Egypt |
| Abstract: |
| Abstract. Sixty-seven sites of Hafafit pegmatite from the Southeastern Desert of Egypt were investigated radiometrically in the field using in situ γ-ray spectrometer to determine eU, eTh, and K contents. The obtained results ranged from 0.4 to 6 ppm for eU with a mean value of 2.5 ppm, from 0.2 to 32 ppm for eTh with a mean value of 6.7 ppm, and from 0.7 % to 5.4 % for K with a mean value of 3.3 %. Consequently, estimating the radiological effects from these rocks by calculating radiological parameters: gamma activity concentration index Iγ, alpha activity index Iα, external hazard index Hex, internal hazard index Hin, external absorbed dose rates in outdoor, and external absorbed dose rates in indoor air. The results obtained in this study showed that values U, Th, and K lie in the range of the acceptable world values. In addition, the calculated radiation hazard parameters (Iγ, Iα, Hex, and Hin) have values lower than the world values, while the calculated external absorbed dose rates (Dout and Din) have values higher than the world values and the Egypt values. |
| Keywords: |
| Natural radioactivity; Southeastern Desert; Pegmatite; Alpha index; Radiation Hazards. |
| Status : Paper Accepted |
