Assessment of radioactivity in the soil samples from Al Bayda city, Libya, and its radiological implications
Keywords::(NaI(Tl) detector , Radioactivity, radiological hazards, soil
The radioactivity concentration of the terrestrial radionuclides (238U, 232Th, and 40K) have been determined in soil samples collected from eight different locations around of Al Bayda city, Libya, using the sodium iodide (NaI) detector. Radioactivity concentrations for these elements were estimated and calculated at 0-10 cm depth, we found that an average values of 64.27 Bq/kg, 65.38 Bq/kg and 157.01 Bq/kg, respectively. As well as the radiological hazards were investigated at the same depth, it was found that the radium equivalent (Raeq) with an average value of 169.85 Bq/kg and the average values for external and internal hazard indices were 0.46 and 0.63, respectively. While, the average values for Gamma and Alpha indices were 0.32 and 0.60, respectively.
In addition, this study was conducted at a depth of 10-20 cm, and the average value of uranium was for 238U, 232Th and 40K, were an average values of 63.76 Bq/kg, 57.89 Bq/kg, and 253.524 Bq/kg, respectively, and the radium equivalent (Raeq) with an average value of 166.06 Bq/kg, and the average values for external and internal hazard indices were 0.45 and 0.62, respectively.The values of Alpha and Gamma indices with average values of 0.32 and 0.59, respectively.
The average activity concentrations of the radionuclides were compared with Global average value where some values were higher than them. The radiological hazard indices of primitive radionuclides were also calculated and it was within the internationally permitted limits.
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