title: A semi-empirical approach to analyze the activities of cylindrical radioactive samples using gamma energies from 185 to 1764 keV.
abstract: This work suggests a method for determining the activities of cylindrical radioactive samples. The self-attenuation factor was applied for providing the self-absorption correction of gamma rays in the sample material. The experimental measurement of a (238)U reference sample and the calculation using the MCNP5 code allow obtaining the semi-empirical formulae of detecting efficiencies for the gamma energies ranged from 185 to 1764keV. These formulae were used to determine the activities of the (238)U, (226)Ra, (232)Th, (137)Cs and (40)K nuclides in the IAEA RGU-1, IAEA-434, IAEA RGTh-1, IAEA-152 and IAEA RGK-1 radioactive standards. The coincidence summing corrections for gamma rays in the (238)U and (232)Th series were applied. The activities obtained in this work were in good agreement with the reference values.
authors.affiliation: Ho Chi Minh City University of Industry, 12 Nguyen Van Bao Street, Go Vap District, Ho Chi Minh City, Vietnam. Electronic address: hlchau@hcm.vnn.vn.
authors.forename: Ngo Quang
authors.initials: NQ
authors.lastname: Huy
authors.affiliation: Ho Chi Minh City University of Technical Education, 1 Vo Van Ngan, Thu Duc Street, Ho Chi Minh City, Vietnam.
authors.forename: Do Quang
authors.initials: DQ
authors.lastname: Binh
keywords: 185 to 1764keV; Activity; Coincidence summing correction; HPGe detector; MCNP5 code; Semi-empirical method