Results of an international comparison of activity measurements of 68Ge

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dc.contributor.authorCessna, JTen_AU
dc.contributor.authorFitzgerald, Ren_AU
dc.contributor.authorZimmerman, BEen_AU
dc.contributor.authorLaureano-Pérez, Len_AU
dc.contributor.authorBergeron, DEen_AU
dc.contributor.authorvan Wyngaardt, WMen_AU
dc.contributor.authorSmith, MLen_AU
dc.contributor.authorJackson, TWen_AU
dc.contributor.authorHowe, Ben_AU
dc.contributor.authorda Silva, CJen_AU
dc.contributor.authorIwahara, Aen_AU
dc.contributor.authorda Cruz, PALen_AU
dc.contributor.authorZhang, Men_AU
dc.contributor.authorLiu, Hen_AU
dc.contributor.authorLiang, JCen_AU
dc.contributor.authorFréchou, Cen_AU
dc.contributor.authorBobin, Cen_AU
dc.contributor.authorCassette, Pen_AU
dc.contributor.authorKossert, Ken_AU
dc.contributor.authorNähle, Oen_AU
dc.contributor.authorMarganiec-Gałązka, Jen_AU
dc.contributor.authorJoseph, Len_AU
dc.contributor.authorRavindra, Aen_AU
dc.contributor.authorKulkarni, DNen_AU
dc.contributor.authorYunoki, Aen_AU
dc.contributor.authorSato, Yen_AU
dc.contributor.authorLee, KBen_AU
dc.contributor.authorLee, JMen_AU
dc.contributor.authorAgusbudiman, Aen_AU
dc.contributor.authorDziel, Ten_AU
dc.contributor.authorListkowska, Aen_AU
dc.contributor.authorTymiński, Zen_AU
dc.contributor.authorSahagia, Men_AU
dc.contributor.authorAntohe, Aen_AU
dc.contributor.authorIoan, MRen_AU
dc.contributor.authorLuca, Aen_AU
dc.contributor.authorKrivosek, Men_AU
dc.contributor.authorOmetakova, Jen_AU
dc.contributor.authorJavornik, Aen_AU
dc.contributor.authorZalesakova, Men_AU
dc.contributor.authorGarcía-Toraño Martinez, Een_AU
dc.contributor.authorRoteta, Men_AU
dc.contributor.authorMejuto, Men_AU
dc.contributor.authorNedjadi, Yen_AU
dc.contributor.authorJuget, Fen_AU
dc.contributor.authorYuan, MCen_AU
dc.contributor.authorYeh, CYen_AU
dc.contributor.authorYeltepe, Een_AU
dc.contributor.authorDirican, Aen_AU
dc.contributor.authorKeightley, JDen_AU
dc.contributor.authorPearce, AKen_AU
dc.date.accessioned2021-12-01T04:04:34Zen_AU
dc.date.available2021-12-01T04:04:34Zen_AU
dc.date.issued2018-04en_AU
dc.date.statistics2021-11-12en_AU
dc.descriptionOne of the authors is cited as Agung which is incorrect. The citation has not been changed. The author is Agung Agusbudiman and his ResearchGate profile is here: https://www.researchgate.net/profile/Agung-Agusbudiman/publications.en_AU
dc.description.abstractAn international key comparison, identifier CCRI(II)-K2.Ge-68, has been performed. The National Institute of Standards and Technology (NIST) served as the pilot laboratory, distributing aliquots of a 68Ge/68Ga solution. Results for the activity concentration, CA, of 68Ge at a reference date of 12h00 UTC 14 November 2014 were submitted by 17 laboratories, encompassing many variants of coincidence methods and liquid-scintillation counting methods. The first use of 4π(Cherenkov)β-γ coincidence and anticoincidence methods in an international comparison is reported. One participant reported results by secondary methods only. Two results, both utilizing pure liquid-scintillation methods, were identified as outliers. Evaluation using the Power-Moderated Mean method results in a proposed Comparison Reference Value (CRV) of 621.7(11) kBq g−1, based on 14 results. The degrees of equivalence and their associated uncertainties are evaluated for each participant. Several participants submitted 3.6 mL ampoules to the BIPM to link the comparison to the International Reference System (SIR) which may lead to the evaluation of a Key Comparison Reference Value and associated degrees of equivalence. An international key comparison, identifier CCRI(II)-K2.Ge-68, has been performed. The National Institute of Standards and Technology (NIST) served as the pilot laboratory, distributing aliquots of a 68Ge/68Ga solution. Results for the activity concentration, CA, of 68Ge at a reference date of 12h00 UTC 14 November 2014 were submitted by 17 laboratories, encompassing many variants of coincidence methods and liquid-scintillation counting methods. The first use of 4π(Cherenkov)β-γ coincidence and anticoincidence methods in an international comparison is reported. One participant reported results by secondary methods only. Two results, both utilizing pure liquid-scintillation methods, were identified as outliers. Evaluation using the Power-Moderated Mean method results in a proposed Comparison Reference Value (CRV) of 621.7(11) kBq g−1, based on 14 results. The degrees of equivalence and their associated uncertainties are evaluated for each participant. Several participants submitted 3.6 mL ampoules to the BIPM to link the comparison to the International Reference System (SIR) which may lead to the evaluation of a Key Comparison Reference Value and associated degrees of equivalence. An international key comparison, identifier CCRI(II)-K2.Ge-68, has been performed. The National Institute of Standards and Technology (NIST) served as the pilot laboratory, distributing aliquots of a 68Ge/68Ga solution. Results for the activity concentration, CA, of 68Ge at a reference date of 12h00 UTC 14 November 2014 were submitted by 17 laboratories, encompassing many variants of coincidence methods and liquid-scintillation counting methods. The first use of 4π(Cherenkov)β-γ coincidence and anticoincidence methods in an international comparison is reported. One participant reported results by secondary methods only. Two results, both utilizing pure liquid-scintillation methods, were identified as outliers. Evaluation using the Power-Moderated Mean method results in a proposed Comparison Reference Value (CRV) of 621.7(11) kBq g−1, based on 14 results. The degrees of equivalence and their associated uncertainties are evaluated for each participant. Several participants submitted 3.6 mL ampoules to the BIPM to link the comparison to the International Reference System (SIR) which may lead to the evaluation of a Key Comparison Reference Value and associated degrees of equivalence. © 2021 Elsevier Ltd.en_AU
dc.identifier.citationCessna, J. T., Fitzgerald, R., Zimmerman, B. E., Laureano-Pérez, L., Bergeron, D. E., van Wyngaardt, F., Smith, M., Jackson, T., Howe, B., da Silva, C. J., Iwahara, A., da Cruz, P. A. L., Zhang, M., Liu, H., Liang, J., Fréchou, C., Bobin, C., Cassette, P., Kossert, K., Nähle, O., Marganiec-Gałązka, J., Joseph, L., Ravindra, A., Kulkarni, D. N., Yunoki, A., Sato, Y., Lee, K. B., Lee, J. M., Agung, Dziel, T., Listkowska, A., Tymiński, Z., Sahagia, M., Antohe, A., Ioan, M.-R., Luca, A., Krivosek, M., Ometakova, J., Javornik, A., Zalesakova, M., García-Toraño Martinez, E., Roteta, M., Mejuto, M., Nedjadi, Y., Juget, F., Yuan, M.-C., Yeh, C. Y., Yeltepe, E., Dirican, A., Keightley, J., & Pearce, A. (2018). Results of an international comparison of activity measurements of 68Ge. Applied Radiation and Isotopes, 134, 385-390. doi:10.1016/j.apradiso.2017.10.052en_AU
dc.identifier.issn0969-8043en_AU
dc.identifier.journaltitleApplied Radiation and Isotopesen_AU
dc.identifier.pagination385-390en_AU
dc.identifier.urihttps://doi.org/10.1016/j.apradiso.2017.10.052en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12313en_AU
dc.identifier.volume134en_AU
dc.language.isoenen_AU
dc.publisherElsevier B. V.en_AU
dc.subjectGermanium 68en_AU
dc.subjectGallium 68en_AU
dc.subjectLiquid scintillatorsen_AU
dc.subjectScintillation countingen_AU
dc.subjectLaboratoriesen_AU
dc.subjectRadiotherapyen_AU
dc.subjectRadioactivityen_AU
dc.titleResults of an international comparison of activity measurements of 68Geen_AU
dc.typeJournal Articleen_AU
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