Preparation and calibration of a 231 Pa reference material

Preparation and calibration of a 231 Pa reference material

A Pa reference material has been characterized for amount of protactinium. This reference material is primarily intended for calibration of Pa tracers produced for U- Pa model age measurements associated with nuclear forensics and nuclear safeguards. Primary measurements for characterization were ma...

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Veröffentlicht in:Journal of radioanalytical and nuclear chemistry 2019, Vol.322 (3)
Hauptverfasser: Essex, Richard M, Williams, Ross W, Treinen, Kerri C, Collé, Ronald, Fitzgerald, Ryan, Galea, Raphael, Keightley, John, LaRosa, Jerome, Laureano-Pérez, Lizbeth, Nour, Svetlana, Pibida, Leticia
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container_title Journal of radioanalytical and nuclear chemistry
container_volume 322
creator Essex, Richard M
Williams, Ross W
Treinen, Kerri C
Collé, Ronald
Fitzgerald, Ryan
Galea, Raphael
Keightley, John
LaRosa, Jerome
Laureano-Pérez, Lizbeth
Nour, Svetlana
Pibida, Leticia
description A Pa reference material has been characterized for amount of protactinium. This reference material is primarily intended for calibration of Pa tracers produced for U- Pa model age measurements associated with nuclear forensics and nuclear safeguards. Primary measurements for characterization were made by isotope dilution mass spectrometry of a purified Pa solution using a Pa isotopic spike. The spike was calibrated by allowing multiple aliquots of the Pa spike solution to decay to U and then measuring the ingrown U by isotope dilution mass spectrometry using a certified uranium assay and isotopic standard as a reverse-spike. The new Pa reference material will simplify calibration of the Pa isotope dilution spikes, provide metrological traceability, and potentially reduce the overall measurement uncertainty of model ages.
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title Preparation and calibration of a 231 Pa reference material
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