Primary standardization of Ra-224 activity by liquid scintillation counting

Denis E. Bergeron; Jeffrey T. Cessna; Ryan P. Fitzgerald; Brian E. Zimmerman; Lizbeth  Laureano-Perez; Ronald  Colle; Leticia S. Pibida; Elisa  Napoli

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PUBLICATIONS

Primary standardization of Ra-224 activity by liquid scintillation counting

Published

October 11, 2019

Author(s)

Denis E. Bergeron, Jeffrey T. Cessna, Ryan P. Fitzgerald, Brian E. Zimmerman, Lizbeth Laureano-Perez, Ronald Colle, Leticia S. Pibida, 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

https://doi.org/10.1016/j.apradiso.2019.108933

Local Download

Keywords

TDCR, liquid scintillation, anticoincidence counting, efficiency tracing, alpha therapy, activity calibration

Health, Radiation, Precision medicine and Nuclear physics

Created October 11, 2019, Updated March 12, 2020