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Comparison of C-14 liquid scintillation counting at NIST and NRC Canada



Denis E. Bergeron, Raphael Galea, Lizbeth Laureano-Perez, Brian E. Zimmerman


An informal bilateral comparison of 14C liquid scintillation (LS) counting at the National Research Council of Canada (NRC) and the National Institute of Standards and Technology (NIST) has been completed. Two solutions, one containing 14C-labeled sodium benzoate and one containing 14C-labeled n-hexadecane, were measured at both laboratories. Despite observed LS cocktail instabilities, the two laboratories achieved accord in their standardizations of both solutions. At the conclusion of the comparison, the beta spectrum used for efficiency calculations was identified as inadequate and the data were reanalyzed with different inputs, improving accord.
Applied Radiation and Isotopes


efficiency tracing, CNET, triple-to-double coincidence ratio, TDCR, 14C, bilateral comparison, benzoate, hexadecane, cocktail instability, beta spectrum shape, shape factor


Bergeron, D. , Galea, R. , Laureano-Perez, L. and Zimmerman, B. (2016), Comparison of C-14 liquid scintillation counting at NIST and NRC Canada, Applied Radiation and Isotopes, [online], (Accessed April 19, 2024)
Created March 1, 2016, Updated February 19, 2017