Atef ElTaher - Physics Department Faculty of Science Al Azhar University,Egypt
Laith Najam - Physics Dept., College of Science, Mosul University, Mosul,IRAQ
Imad Hussian - Physics Dept., College of Science, Mosul University,IRAQ
Mohammed Ali Omar - Department of Radiologic Technology,College of Applied Medical Science,Qassim University,KSA

Introduction: This Study has was  carried out to measure and detect the natural occurred radionuclide content including ۲۲۶Ra, ۲۳۲Th and ۴۰K in the  Nile River sediments at various locations in Upper Egypt, from Aswan to El-Minya. Additionally, we determine the absorbed dose rate, the annual effective dose equivalent, and excess lifetime cancer risk also has been calculated. Material and Methods: The gamma ray measurements were performed with a high resolution High-Purity Germanium detector, low background, and Personal Computer multichannel analyzer. Results: In Aswan Governorate, the mean   specific activities of radionuclide's (۲۲۶Ra,۲۳۲Th and ۴۰K) ۱۴.۸۶, ۱۳.۷۸ and ۱۷۵.۴ in Bq/kg respectively. In Qena Governorate, the mean specific activities of mentioned radionuclides were ۱۴.۴۴ Bq/kg, ۱۵.۰۲ Bq/kg and ۱۹۷.۵۷ Bq/kg, respectively. These values were۱۸.۵۳ Bq/kg, ۱۱.۳ Bq/kg and ۱۸۴.۷۳ Bq/kg in Sohag Governorate, respectively. In Asyut Governorate the mean specific activities of the radionuclide's were ۱۱.۳۸ Bq/kg, ۱۰.۰ Bq/kg, and ۱۶۴.۷۱۵ Bq/kg, respectively. However, these values were ۱۹.۵۶ Bq/kg, ۱۱.۷۲ Bq/kg, and ۲۳۹.۹۲ Bq/kg in Minya Governorate, respectively. The hazard indices of gamma radiation such as Absorbed dose rate, annual effective dose equivalent and excess lifetime cancer risk were calculated. Conclusion: According to the results, all the  values were within the reported values by the United Nations Scientific Committee  on the Effects of Atomic Radiation. In addition, there was no likelihood of radiological health hazards to the population living close to the Nile river.

Dose Rate, Gamma Spectroscopy, Hazard Indices, Radionuclides