title: Concentrations of226Ra,232Th and40K in industrial kaolinized granite.
abstract: Activity concentrations of226Ra,232Th and40K in 120 kaolinized granite samples imported in Serbia from the Motajica mine, Bosnia and Herzegovina, were measured. The226Ra concentration ranged from 61 to 319 Bq kg-1, the232Th from 44 to 272 Bq kg-1, and the40K from 590 to 1470 Bq kg-1. The frequency distribution of40K concentrations was near-Gaussian, where those of226Ra and232Th were right-skewed. In 6 samples, the gamma index, I, was higher than 2, which exceeds the exemption dose criterion (0.3 mSv y-1). The absorbed dose rate and annual effective doses for workers in the ceramic industries in Serbia who worked with kaolinized granite were below levels of concern.
authors: University of Novi Sad, Faculty of Sciences, Department of Physics, Novi Sad, Serbia. Electronic address: natasa.todorovic@df.uns.ac.rs.
authors: Nataša
authors: N
authors: Todorović
authors: University of Novi Sad, Faculty of Sciences, Department of Physics, Novi Sad, Serbia.
authors: Jan
authors: J
authors: Hansman
authors: University of Novi Sad, Faculty of Sciences, Department of Physics, Novi Sad, Serbia.
authors: Dušan
authors: D
authors: Mrđa
authors: University of Novi Sad, Faculty of Sciences, Department of Physics, Novi Sad, Serbia.
authors: Jovana
authors: J
authors: Nikolov
authors: University of Pannonia, Institute of Radiochemistry and Radioecology, Veszprém, Hungary.
authors: Richárd
authors: R
authors: Kardos
authors: University of Novi Sad, Faculty of Sciences, Department of Physics, Novi Sad, Serbia.
authors: Miodrag
authors: M
authors: Krmar
mesh_terms: D017522:Bosnia and Herzegovina; D003252:Construction Materials / Q000032:analysis*; D007616:Kaolin / Q000737:chemistry; D008906:Mining; D011197:Potassium Radioisotopes / Q000032:analysis*; D011834:Radiation Monitoring; D011883:Radium / Q000032:analysis*; D055771:Serbia; D012822:Silicon Dioxide / Q000737:chemistry*; D013910:Thorium / Q000032:analysis*
chemical_list: D011197:Potassium Radioisotopes; C007886:granite; D007616:Kaolin; D013910:Thorium; D012822:Silicon Dioxide; D011883:Radium
keywords: Annual effective dose D(e); Dose rate D; Gamma index I; Gamma spectrometry; Kaolinized granite