U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Primary standardization of Ra-224 activity by liquid scintillation counting

Published

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

Citation

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 December 3, 2023)

Created October 11, 2019, Updated March 12, 2020