The Effective Dose Equivalent for potassium K40 in Cow's Milk of Salah-Din Governorate/ Iraq

Abstract

Radioactivity was measured for 170 cow's milk samples in Salah-Din governorate. Samples were measured by a gamma spectrometry system, using a high purity germanium (HPGe) detector. The detector was shielded by 10 cm all sides with cadmium copper in the inner sides. The selected characteristic gamma peaks for the detection of different ware 1460kev for K-40. The energy calibration was performed using a set of standard gamma ray calibration sources Eu-152. The results of show the presence of in all samples of milk. The maximum radioactivity was seen in Baiji city was (424 Bq/kg), while the minimum was seen in Abayaji (256 Bq/kg) and the average of all samples was (341.3 Bq/kg) and the annual effective dose was 0.302`mSv/y.That considered as the annual limit of rang of public recommended by the FAO.