Primary standardization of 224 Ra activity by liquid scintillation counting.

Authors :: Napoli E
Cessna JT
Fitzgerald R
Pibida L
Collé R
Laureano-Pérez L
Zimmerman BE
Bergeron DE
Source :: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2020 Jan; Vol. 155, pp. 108933. Date of Electronic Publication: 2019 Oct 11.
Publication Year :: 2020
Abstract: A standard for activity of <superscript>224</superscript> Ra in secular equilibrium with its progeny 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 0.62% (k = 2). Calibration settings were also determined for a 5 mL flame-sealed ampoule on several commercial reentrant ionization chambers (dose calibrators).<br /> (Published by Elsevier Ltd.)

Language :: English
ISSN :: 1872-9800
Volume :: 155
Database :: MEDLINE
Journal :: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
Publication Type :: Academic Journal
Accession number :: 31654881
Full Text :: https://doi.org/10.1016/j.apradiso.2019.108933