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Radiation Protection Dosimetry Advance Access originally published online on June 14, 2007
Radiation Protection Dosimetry 2007 124(2):148-154; doi:10.1093/rpd/ncm211
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Natural radioactivity levels and radiation hazard indices in granite from Aswan to Wadi El-Allaqi southeastern desert, Egypt

A. El-Taher1,*, M. A. M. Uosif and A. A. Orabi2

1 Department of Physics, Al-Azhar University, (Assuit branch), Egypt
2 Department of Geology, Al-Azhar University, (Assuit branch), Egypt

* Corresponding author: atef_eltaher{at}hotmail.com

Received August 14, 2006, amended March 1, 2007, accepted March 5, 2007

Studies on radiation level and radionuclide distribution in granite from Aswan to Wadi El-Allaqi area that is located in southeastern desert of Egypt were undertaken. The samples collected from five locations: Gabal El Mesala, Umm Hibal, Abu Herigle, Abu Marw and Deneibit El Quleib. The purpose of this study is to provide a baseline map of radioactivity background levels in the investigated area environment, and this study will be used as reference information to assess any changes in the radioactive background level due to geological processes. The highest average values of 226Ra and 232Th concentrations (24.00 and 31.28 Bq kg–1, respectively) were observed at Abu Herigle region, whereas the highest average value of 40K concentration, 589.95 Bq kg–1, was detected in Umm Hibal. The absorbed dose rate in air was found to be in the range between 5.40 and 45.11 nGy h–1, and radium equivalent activity concentration was found in the range between 29.57 and 71.85 Bq kg–1. Also the representative external hazard index values for the corresponding samples were also estimated and given.


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