Abstract:The level of natural radioactivity has been studied in the bottom river sediments of Euphrates river course through three governorates (AL-Najaf ALAsharf , Babylon and AL-Qadisiya).Where thirty samples from river sediments(ten samples at each governorate) were taken to laboratory for radio analysis. These spectral measurements were carried out by the use of NaI (Tl) detector that has the dimensions of (3"×3") high efficiency .The radioactivity of naturally composed radioactivity nuclide, and for natural decay series. The specific activities of the studied samples measured by units(Bq\Kg) then the spectra of studied samples were analyzed. The specific activities in the three governorates respectively in AL-Najaf AL-Ashraf it has been found the values
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