en Medical Physics Medical Physics تحقيق بديع Original Research <div style="text-align: justify;">Background: In this proposed work, the products of ²³⁸U radioactive decomposition: ²²⁶Ra, which has a comparatively great decomposition period and ²²⁸Ra intermediate product of ²³²Th were examined, which were more prevalent in water samples of the territories investigated. Natural radionuclides are usually observed more in artesian well waters than in river and canal waters, and less in comparison with groundwater. Materials and Methods: For studying the concentration of radionuclides in drinking and agricultural water, samples were collected from Kura River, Yukhari Garabakh and Yukhari Shirvan channels and from artesian wells in different regions. For measurement of radioactivity, gamma spectrometer with high-sensitivity Ge-detector was used, controlled by the software Genie 2000 (manufactured by CANBERRA firm). Results: The obtained results for well waters showed high activity concentrations; the total effective doses for all radionuclides were 2.54, 4.27, and 0.66 mSv for infants, children, and adults, respectively. Conclusion: From these results, it can be concluded that the investigated water is not acceptable for life-long human consumption.</div> Radionuclide, groundwater, marinelly, qamma-spectrometr. 323 331 http://ijrr.com/browse.php?a_code=A-10-2055-17&slc_lang=en&sid=1 A.A. Garibov nukl@box.az 7900319475328460015746 7900319475328460015746 Yes National Nuclear Research Center, Baku, Azerbaijan A.C. Mikayilova 7900319475328460015747 7900319475328460015747 No Institute of Radiation Problems of ANAS, Baku, Azerbaijan F.Y. Humbatov 7900319475328460015748 7900319475328460015748 No Institute of Radiation Problems of ANAS, Baku, Azerbaijan M.R. Ghahramani 7900319475328460015749 7900319475328460015749 No Institute of Radiation Problems of ANAS, Baku, Azerbaijan J.A. Nagiyev 7900319475328460015750 7900319475328460015750 No National Nuclear Research Center, Baku, Azerbaijan