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Preparation and calibration of a Protactinium-231 reference material

Published

Author(s)

Richard Essex, Ross W. Williams, Kerri C. Treinen, Ronald Colle, Ryan P. Fitzgerald, Raphael Galea, John Keightley, Jerome LaRosa, Lizbeth Laureano-Perez, Svetlana Nour, Leticia Pibida

Abstract

A 231Pa reference material has been characterized for amount of Pa. This reference material is primarily intended for calibration of 233Pa tracers produced for 231Pa - 235U model age measurements associated with nuclear forensics and nuclear safeguards. Primary measurements for characterization were made by isotope dilution mass spectrometry of a purified 231Pa solution using a 233Pa spike. The spike was calibrated by allowing multiple aliquots of the 233Pa spike solution to decay to 233U and then measuring the ingrown 233U by isotope dilution mass spectrometry using a certified uranium assay and isotopic standard as a reverse-spike. The new 231Pa reference material will simplify calibration of the 233Pa isotope dilution spikes, provide metrological traceability, and potentially reduce the overall measurement uncertainty of model ages.
Citation
Journal of Radioanalytical Nuclear Chemistry

Keywords

Isotope dilution mass spectrometry, Nuclear forensics, 231Pa, 233Pa, Radiochronometry, Reference material

Citation

Essex, R. , Williams, R. , Treinen, K. , Colle, R. , , R. , Galea, R. , Keightley, J. , LaRosa, J. , Laureano-Perez, L. , Nour, S. and Pibida, L. (2019), Preparation and calibration of a Protactinium-231 reference material, Journal of Radioanalytical Nuclear Chemistry, [online], https://doi.org/10.1007/s10967-019-06711-6 (Accessed October 21, 2021)
Created August 21, 2019, Updated June 24, 2021