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Fluorine analysis by activation with an isotopic fast-neutron source and counting Nitrogen-16

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Abstract

A rapid, nondestructive method has been developed for determination of fluorine by activation with fast neutrons from a241Am-242Cm-Be source and counting the 6–7 MeV γ rays of the product nitrogen-16. The total neutron output of the source is 4.8·109 unmoderated neutrons per second and the flux is 1.4·108 fast n·cm−2· sec−1. The γ-ray detectors consist of two opposing, matched cylindrical NaI(Tl) crystals 10 cm long and 10 cm in diameter. The sample is irradiated for 30 seconds, cooled for 4 seconds, and then counted for 30 seconds. The sensitivity is 4.8·104 counts nitrogen-16 per gram fluorine, and the limit of detection is 0.4 mg fluorine in a 10-gram sample. A reproducibility of 0.24% is achieved. The relative standard deviation of the specific count rate of nitrogen-16 for 11 fluorine compounds is 1.31%.

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Authors and Affiliations

  1. Chemistry division, Argonne National Laboratory, Argonne, Illinois, USA

    J. Wing & M. A. Wahlgren

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  1. J. Wing
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  2. M. A. Wahlgren
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Wing, J., Wahlgren, M.A. Fluorine analysis by activation with an isotopic fast-neutron source and counting Nitrogen-16. J. Radioanal. Chem. 3, 37–42 (1969). https://doi.org/10.1007/BF02513996

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  • DOI: https://doi.org/10.1007/BF02513996

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