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TDCR Measurements on Pu-241 at NIST



Denis E. Bergeron, Brian E. Zimmerman


We have performed a series of measurements on a Pu-241 solution using the triple-to-double coincidence ratio (TDCR) liquid scintillation technique. A similar series of measurements in 2007 revealed significant discord between activity values determined via TDCR and those determined via efficiency tracing and Am-241-ingrowth LS methods. We describe how consideration of photomultiplier statistics, internal scintillation photon reflection effects, photopeak rejection, and count correction for impurities brought the new series of TDCR measurements into improved accord with other techniques.


triple-to-double coincidence ratio, liquid scintillation, Plutonium-241


Bergeron, D. and Zimmerman, B. (2010), TDCR Measurements on Pu-241 at NIST, Radiocarbon, [online], (Accessed July 21, 2024)


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Created December 21, 2010, Updated February 19, 2017