Radiation Study of Selected Biological Samples in Some Governorates of Iraq by using germanium detector

The aim of the present work is to measure the specific activities of radionuclides in cancerous samples of human tissues that excised from patients living in (Baghdad, Najif and Babylon) governorates, by using a new gamma- ray spectrometry system (DSA 2000) with high purity germanium detector, which has (50%) efficiency and resolution of (511 keV) at gamma line (1274 keV) of the radioactive source (Na- 22). The radioactive elements (radionuclides) (Cs-137) and (K-40) were detected in all samples in the range (0.019-4.46 Bq/kg) and (47.08-135.38 Bq/kg) respectively, with the (womb,lung,colon) tissues having the highest specific activity of (85.36 Bq/kg , 135.38 Bq/kg and 108.66 Bq/kg) respectively of (K-40) radioactive element in Baghdad governorate. The highest number of radioactive elements (five radioactive elements) were found in lung and colon tissues in Baghdad governorate, while the lowest number of radioactive elements (two radioactive elements) were found in womb tissue in Babylon governorate.