حساب تراكيز مطلقا الغا لنماذج بايولوجية في بعض محافظات العراق باستخدام كاشف الاثر النووي (CR-39)

The aim of the present work is to determine the and alpha particles concentration in human ti ssue samples (womb, lung and col on) emitted from the radioactive elements (radio nuclides) (U-238,Th-232, Ra-226 and Po-2 18) in tissue samples by using nuclear track detector (CR-39),for three Iraqi governorates ,namely,Baghdad,Naj if and Babylon. The results obtained have shown that the higher average concentrations of alpha particles in human tissue samples were in the womb and colon tissues which were (0.0712 ppm) and (0.0647 ppm) respectively were in Baghdad governorate,while the higher average alpha particles concentration in the lung tissue was found to be (0.052 ppm) in Babylon governorate