eng Science and Education Publishing International Journal of Physics 2333-4576 2016-04-15 4 3 50 54 10.12691/ijp-4-3-1 IJP2016431 article Abdulla Ahmad Rasheed 1 Nada Farhan Kadhum 1 Nadhim Khaleel Ibrahim nawi1980@yahoo.com 2 Department of Physics, College of Science, AL-Mustansiriya University, Iraq Ministry of Science and Technology, Iraq The activity concentrations of naturally occurring radionuclides 226Ra, 232Th and 40K in soil samples collected from Fuel Fabrication Facility in Al-Tuwaitha nuclear site were measured by using a high resolution gamma spectrometry system via High Purity Germanium (HPGe) Detector with a relative efficiency of (>40%) and resolution (<1.8keV) at energy of (1.33MeV) for 60Co. The average activity concentrations of 226Ra, 232Th and 40K in soil samples were found to be 15.78±1.16, 14.09±1.33 and 306.42±18.1 Bqkg-1, respectively. The results obtained for the corresponding radionuclides are lower than the worldwide average values of 35, 30, and 400 Bqkg-1, respectively. The average absorbed dose rate in air (D), the average radium equivalent activity (Raeq) and the average external hazard index (Hex) were determined as 28.90±2.12 nGyh-1, 59.52±4.45 Bqkg-1 and 0.16±0.012, respectively, which are below the permissible limit. http://pubs.sciepub.com/ijp/4/3/1/ijp-4-3-1.pdf activity concentration gamma spectrometry radium equivalent activity hazard indices