Radioactivity measurements in soil samples collected in the Republic of Srpska

During 2005 and 2006, soil samples were collected from different regions in the Republic of Srpska, in order to evaluate their radioactivity. During the war that lasted from 1994 to 1995, it is known that some locations in the Republic of Srpska were imposed upon by NATO forces. Sampled locations were chosen far away from the bombed places in order to check whether the depleted uranium was dispersed over long distances.The activity concentrations of radionuclides in soil samples were determined by gamma spectrometry (HPGe detector, relative efficiency 23%). Results showed the presence of natural radionuclides 226Ra226Ra, 232Th232Th, 40K40K, 235U235U, 238U238U as well as the produced radionuclide 137Cs137Cs (from the Chernobyl accident and nuclear probes).In order to evaluate the radiological hazard of the natural radioactivity, the radium equivalent activity, the gamma-absorbed dose rate, the annual effective dose rate and the external hazard index have been calculated.