title: Assessment of natural radioactivity and the associated hazards in Iranian cement.
abstract: This paper presents the finding of a study undertaken to determine natural radioactivity and associated hazards in local types of cement in Iran. A total of 42 samples were collected from various manufacturers and suppliers and analysed using a shielded HPGe gamma-ray spectrometer. The specific activities of 232Th, 226Ra and 40K were measured in samples and results ranged from minimum values of 8, 16, 101 Bq kg(-1) to maximum values of 17, 43 and 141 Bq kg(-1), respectively. On the basis of activity concentration index (I), it could be shown that, the radioactivity of local cement samples was not greater than the established standard values in other countries.
authors.affiliation: National Radiation Protection Department P.O. Box 14155-4494, Tehran, Iran. afathivand@yahoo.com
authors.forename: A A
authors.initials: AA
authors.lastname: Fathivand
authors.forename: J
authors.initials: J
authors.lastname: Amidi
mesh_terms: D001417:Background Radiation; D003252:Construction Materials / Q000032:analysis*; D007492:Iran; D008422:Materials Testing; D011829:Radiation Dosage; D011868:Radioisotopes / Q000032:analysis*; D011874:Radiometry; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors
chemical_list: D011868:Radioisotopes