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PUBLICATIONS

Activity standard and calibrations for 227Th with ingrowing progeny

Published

Author(s)

Denis E. Bergeron, Jeffrey T. Cessna, Brittany Broder, Leticia Pibida, Ryan P. Fitzgerald, Morgan DiGiorgio, Elisa Napoli, Brian E. Zimmerman

Abstract

Thorium-227 was separated from its progeny and standardized for activity by the triple-to-double coincidence ratio (TDCR) method of liquid scintillation counting. Confirmatory liquid scintillation-based measurements were made using efficiency tracing with 3H and live-timed anticoincidence counting (LTAC). The separation time and the efficiency of the separation were confirmed by gamma-ray spectrometry. Calibrations for reentrant pressurized ionization chambers, including commercial radionuclide calibrators, and a well-type NaI(Tl) detector are discussed.
Citation
Applied Radiation and Isotopes
Volume
209
Pub Type
Journals

Download Paper

https://doi.org/10.1016/j.apradiso.2024.111326
Local Download

Keywords

Th-227, Ra-223, primary standard, decay chain, progeny ingrowth, dose calibrator, gamma counter, decay data, targeted alpha therapy, precision medicine, administered activity
Radiation, Precision medicine and Nuclear physics

Citation

Bergeron, D. , Cessna, J. , Broder, B. , Pibida, L. , Fitzgerald, R. , DiGiorgio, M. , Napoli, E. and Zimmerman, B. (2024), Activity standard and calibrations for 227Th with ingrowing progeny, Applied Radiation and Isotopes, [online], https://doi.org/10.1016/j.apradiso.2024.111326, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957117 (Accessed October 10, 2025)

Issues

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Created April 20, 2024, Updated May 14, 2024
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