Natural radionuclides content and radioactive series disequilibrium in drinking waters from Balkans region

Natural radioactivity of drinking water with various geological origin in Balkans region has been studied. Collected water samples are analyzed for total alpha and total beta activities and specific alpha- and gamma-emitting radionuclides content using low-background proportional counting and alpha and gamma-spectrometry techniques. Obtained activity concentrations of U-238, U-234, U-235, Ra-226, Th-232, and K-40 in water samples and radioactive disequilibrium between members of the natural radioactive series, based on the isotopic ratios, has been discussed