Rafidain Journal of Science

Abstract

Specific activity of Natural and industrial radionuclides in sediments samples collected from the Tigris river of Dhuliya city of Salah Uddin Governorate was measured using γ-ray spectroscopy. The γ-ray spectrometry was carried out using NaI(Tl) detector. The results indicated that specific activity of ²²⁶Ra ranged from 1.51Bq/kg to 84.68Bq/kg with average 15.48Bq/kg, ²²⁸Ac ranged from 1.47 to 49.84Bq/kg with average 8.36Bq/kg, ⁴⁰K ranged from 56.51Bq/kg to 711.34Bq/kg with average 418.47Bq/kg and ¹³⁷Cs ranged from 2.77Bq/kg to 9.78Bq/kg with average 2.88Bq/kg. The average concentrations of these radionuclides were less than the internationally accepted limit ​​except for ⁴⁰K radionuclides. The radiological parameters of the radium equivalent activity (Raeq), absorbed gamma dose rate (D_γ), external and internal annual effective dose (AEDE), external and internal risks (H_ex, H_in), and gamma radiation representative level index (I_γ) were calculated and found to be lower than the internationally acceptable limit value.