Bergeron, D.
, Cessna, J.
, Fitzgerald, R.
, Zimmerman, B.
, Laureano-Perez, L.
, Colle, R.
, Pibida, L.
and Napoli, E.
(2019),
Primary standardization of Ra-224 activity by liquid scintillation counting, Applied Radiation and Isotopes, [online], https://doi.org/10.1016/j.apradiso.2019.108933
(Accessed June 24, 2025)
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Primary standardization of Ra-224 activity by liquid scintillation counting
Published
Author(s)
, , , , , , , Elisa Napoli
Abstract
A standard for 224Ra activity has been developed, based on triple-to-double coincidence ratio (TDCR) liquid scintillation (LS) counting. The standard was confirmed by efficiency tracing and 4παβ(LS)-γ(NaI(Tl)) anticoincidence counting, as well as by 4πγ ionization chamber and NaI(Tl) measurements. Secondary standard ionization chambers were calibrated with an expanded uncertainty of 0.57 % (k = 2). Calibration settings were also determined for a 5 mL flame- sealed ampoule on several commercial reentrant ionization chambers (dose calibrators).Citation
Applied Radiation and Isotopes
Volume
155
Pub Type
Journals
Download Paper
Keywords
TDCR, liquid scintillation, anticoincidence counting, efficiency tracing, alpha therapy, activity calibration
Citation
Issues
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Created October 11, 2019, Updated March 12, 2020