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Evaluation of Natural Radioactivity Levels in Soil Samples from Eastern and Northern Regions of South Kordofan State, Sudan

Author Affiliations

  • 11Physics Department, College of Sciences and Arts in Al-Namas (Female), University of Bisha , Kingdom of Saudi Arabia, Saudi Arabia, 2Physics Department, Faculty of Sciences, Sudan University of Sciences and Technology, Sudan
  • 22Physics Department, Faculty of Sciences, Sudan University of Sciences and Technology, Sudan, 3Physics Department, Faculty of sciences, Taibah University, Al-Medina Al-Munawarah, Kingdom of Saudi Arabia, Saudi Arabia
  • 34Sudan Atomic Energy Commission, P.O. Box 3001, Khartoum, Sudan
  • 44Sudan Atomic Energy Commission, P.O. Box 3001, Khartoum, Sudan, 5Committee on Radiation and Environmental Pollution Protection, Al Imam Mohammad Ibn Saud Islamic University, Riyadh, Kingdom of Saudi Arabia, Saudi Arabia
  • 54Sudan Atomic Energy Commission, P.O. Box 3001, Khartoum, Sudan
  • 64Sudan Atomic Energy Commission, P.O. Box 3001, Khartoum, Sudan

Res. J. Physical Sci., Volume 4, Issue (2), Pages 1-7, March,4 (2016)

Abstract

The current research is to assess the natural radioactivity level in the soil samples around eastern and northern regions of South Kordofan State. The radioactivity concentration of 238U, 232Th, and 40K have been determined using γ-ray spectroscopy equipped with NaI (Tl) detector, the absorbed dose rate and annual effective dose were assessed. The activity concentration of 238U, 232Th and 40K was 15.44 to 868.24, 7.12 to 406.61 and 226.67 to 2168.52Bqkg-1 with average value of 108.82, 98.03 and 1059.13Bqkg-1, respectively. The average values of obtained results were found to be higher than UNSCEAR reported data. The absorbed dose rate and annual effective dose were determined and found to be in range of 23.87 to 586.06nGyh-1 and 29.29 to 719.23 µSvy-1 with average value of 153.65nGyh-1 and 188.56µSvy-1, respectively. The previous analysis has resulted that significant correlation was found between 232Th and both of 238U and 40K (P>0.01), while no correlation was found between 238U and 40K. Estimation of the relative contribution of the 238U, 232Th and 40K to the overall absorbed dose in air discovered that the main contribution comes from 232Th 38.54 %.

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