Abstract
A fast and precise method of determining fluorine in geological matrices is proposed. The 0.20 MeV photopeak of19O, induced by the19F(n, p)19O reaction, was used for this assay. Neutron flux monitoring was achieved by adding an internal standard monitor (20 mg Ce) to each sample and counting the activity due to the 0.74 MeV photopeak of139mCe, produced in the140Ce(n, 2n)139mCe reaction. This activity was considered to be proportional to the neutron flux during the sample irradiation. This method of fluorine determination was checked on two fluorine geological standards, mica and apatite, containing 1.50 and 2.90% fluorine, respectively. The sensitivity of the method, obviously depending upon the matrix composition, was 1.46 mg for the mica standard.
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Weber, G., Guillaume, M. Fast and precise determination of fluorine in geological samples by 14 MeV neutron activation analysis. J. Radioanal. Chem. 5, 379–386 (1970). https://doi.org/10.1007/BF02513855
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DOI: https://doi.org/10.1007/BF02513855