Akademik Veri Yönetim Sistemi
J Scientific and Engineering Research, cilt.3, sa.3, ss.482-489, 2016 (Hakemli Dergi)
This paper presents the results of a search for determining the activity concentrations of 90Sr, 14C, 40K, 134Cs and 137Cs in mixed diet samples by using liquid scintillation and gamma spectrometric methods. Samples were collected by using duplicate portion sampling technique and dried by freeze dryer after their homogenization process. The method used in the 90Sr analysis is based on the separation of the daughter 90Y at equilibrium with 10% di(2-ethyl-hexyl)phosphoric acid (HDEPH) in toluene and Cherenkov counting by a liquid scintillation spectrometer (LSS). 14C activity concentration is determined by the combustion of the sample in an oxygen atmosphere to 14CO2, absorption of 14CO2 by special reagent, mixing with the scintillator and counting in liquid scintillation spectrometer. 40K, 134Cs and 137Cs activity concentrations were measured by high purity germanium detectors in gamma spectrometer. An annual effective dose caused by these radionuclides was estimated using dose conversion coefficients and measured activity concentrations in samples.