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The effect of impurities on calculated activity in the triple-to-double coincidence ratio liquid scintillation method

Published

Author(s)

Denis E. Bergeron, Ryan P. Fitzgerald, Brian E. Zimmerman, Jeffrey T. Cessna

Abstract

In the triple-to-double coincidence ratio (TDCR) method of liquid scintillation counting, unaccounted or improperly accounted impurities can result in lower-than-expected or higher-than-expected recovered activities, depending on the counting efficiency of the nuclide of interest, the counting efficiency of the radionuclidic impurity, and the amount of impurity present. We describe these general dependences using a simple model. The trends predicted by the model are tested experimentally using a series of mixed 241Am/3H and 63Ni/3H sources. An “impurity surface” is derived to facilitate an intuitive grasp of impurity phenomena in TDCR.
Citation
Applied Radiation and Isotopes

Keywords

triple-to-double coincidence ratio, TDCR, liquid scintillation, impurities, multilevel

Citation

Bergeron, D. , Fitzgerald, R. , Zimmerman, B. and Cessna, J. (2012), The effect of impurities on calculated activity in the triple-to-double coincidence ratio liquid scintillation method, Applied Radiation and Isotopes, [online], https://doi.org/10.1016/j.apradiso.2012.02.084 (Accessed April 17, 2024)
Created March 4, 2012, Updated November 10, 2018