CCRI.RI(II)-K2.Pa-231 comparison of activity measurements of the radionuclide 231Pa

Jerome, Simon; Ainsworth, Daniel; Aitken-Smith, Paris; Arinc, Arzu; Bobin, Christophe; Cassette, Philippe; Collins, Sean; Crespo, Teresa; Dersch, Rainer; Andrew, Fenwick; Fréchou, Carole; Fuyou, Fan; Galea, Raphael; García-Toraño, Eduardo; Honig, Anja; Ivanov, Peter; Juncheng, Liang; Keightley, John; Kossert, Karsten; Liu, Haoran; Marouli, Maria; Michotte, Carine; Ming, Zhang; Moore, Kim; Pommé, Stefaan; Shearman, Robert; Stroh, Heiko; Ammel, Raf Van

doi:https://doi.org/10.1088/0026-1394/62/1A/06005

Zugriffsnummer	54577
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	CCRI.RI(II)-K2.Pa-231 comparison of activity measurements of the radionuclide ²³¹Pa
Autor(in); Institution	Jerome, Simon; National Physical Laboratory, Teddington, UK Ainsworth, Daniel; National Physical Laboratory, Teddington, UK Aitken-Smith, Paris; National Physical Laboratory, Teddington, UK Arinc, Arzu; National Physical Laboratory, Teddington, UK Bobin, Christophe; Laboratoire National de metrologie et d'Essais – Laboratoire National Henri Becquerel (LNE-LNHB), Saclay, FRANCE Cassette, Philippe; Laboratoire National de metrologie et d'Essais – Laboratoire National Henri Becquerel (LNE-LNHB), Saclay, FRANCE Collins, Sean; National Physical Laboratory, Teddington, UK Crespo, Teresa; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, SPAIN Dersch, Rainer; PTB-Braunschweig, retired staff Andrew, Fenwick; National Physical Laboratory, Teddington, UK Fréchou, Carole; Laboratoire National de metrologie et d'Essais – Laboratoire National Henri Becquerel (LNE-LNHB), Saclay, FRANCE Fuyou, Fan; National Research Council – Conseil National de Recherches du Canada (NRC-CNRC), Ottawa, CANADA Galea, Raphael; National Research Council – Conseil National de Recherches du Canada (NRC-CNRC), Ottawa, CANADA García-Toraño, Eduardo; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, SPAIN Honig, Anja; 6.1, Radioaktivität, PTB-Braunschweig Ivanov, Peter; National Physical Laboratory, Teddington, UK Juncheng, Liang; National Institute of Metrology (NIM), Beijing, CHINA Keightley, John; National Physical Laboratory, Teddington, UK Kossert, Karsten; 6.1, Radioaktivität, PTB-Braunschweig Liu, Haoran; National Institute of Metrology (NIM), Beijing, CHINA Marouli, Maria; European Union Joint Research Centre (JRC), Geel, BELGIUM Michotte, Carine; Bureau International des Poids et Mesures (BIPM), Sèvres, FRANCE Ming, Zhang; National Institute of Metrology (NIM), Beijing, CHINA Moore, Kim; National Research Council – Conseil National de Recherches du Canada (NRC-CNRC), Ottawa, CANADA Pommé, Stefaan; European Union Joint Research Centre (JRC), Geel, BELGIUM Shearman, Robert; National Physical Laboratory, Teddington, UK Stroh, Heiko; European Union Joint Research Centre (JRC), Geel, BELGIUM Ammel, Raf Van; European Union Joint Research Centre (JRC), Geel, BELGIUM
Quelle/Jahr	Metrologia: 62 (2025), 1 A, 1 - 20
Artikelnummer	06005
Availability	[online only]
ISSN	0026-1394 (print) ; 1681-7575 (online)
DOI	https://doi.org/10.1088/0026-1394/62/1A/06005
Verlag	Bristol: IOP
Zusammenfassung	The introduction over the last decade of radionuclide therapy based on ²²³Ra and ²²⁷Th has reawakened interest in the radionuclides of the ²³⁵U decay series (the 4n+3 decay chain). This has coincided with a requirement for improved accuracy in dating of longlived radionuclides for nuclear forensic and for geological purposes. Thus, ²³¹Pa has become the subject of revived interest in recent years. The short-term ingrowth of the decay progeny is of interest to nuclear forensic science since it enables the direct calculation of the separation age of enriched ²³⁵U[1]; separation times based on the ²³⁴U-²³⁰Th chain may also be calculated, but are more complex due to the reliance on the ²³⁸U-²³⁴Th-²³⁴mPa-²³⁴U-²³⁰Th decay family. Furthermore, since protactinium fluorides are non-volatile at ordinary temperature, the build-up of ²³¹Pa in fuel enrichment facilities may provide information on throughput of separation units as well as the whole plant. In the longer term, the characterisation of sedimentation rates is facilitated by a range of natural nuclear chronometers that include ²³¹Pa/²³⁵U to provide information concerning sediment formation, and the measurement of ²³¹Pa:²³⁰Th mass ratios (as well as ²³¹Pa:²³⁵U and ²³⁰Th:²³⁴U mass ratios) may also provide information of global temperature trends over the 100-200 ka range[2]. This report summarises the results of an international comparison of the activity per unit mass of the same ²³¹Pa solution along with a new half-life determination[3].

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Themenbereich der Metrologie	Ionisierende Strahlung
Geschäftsfelder	Grundlagen der Metrologie

Zitierung

Jerome, S., Ainsworth, D., Aitken-Smith, P., Arinc, A., Bobin, C., Cassette, P., Collins, S., Crespo, T., Dersch, R., Andrew, F., Fréchou, C., Fuyou, F., Galea, R., García-Toraño, E., Honig, A., Ivanov, P., Juncheng, L., Keightley, J., Kossert, K., Liu, H., Marouli, M., Michotte, C., Ming, Z., Moore, K., Pommé, S., Shearman, R., Stroh, H., & Ammel, R. V. (2025). CCRI.RI(II)-K2.Pa-231 comparison of activity measurements of the radionuclide ²³¹Pa. Metrologia, 62(1 A), 1–20. https://doi.org/10.1088/0026-1394/62/1A/06005

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