Comparison of triple-to-double coincidence ratio (TDCR) efficiency calculations and uncertainty assessments for Tc-99

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dc.contributor.authorZimmerman, BEen_AU
dc.contributor.authorAltzitzoglou, Ten_AU
dc.contributor.authorRodrigues, Den_AU
dc.contributor.authorBroda, Ren_AU
dc.contributor.authorCassette, Pen_AU
dc.contributor.authorMo, Len_AU
dc.contributor.authorRatel, Gen_AU
dc.contributor.authorSimpson, BRSen_AU
dc.contributor.authorvan Wyngaardt, WMen_AU
dc.contributor.authorWatjen, Cen_AU
dc.date.accessioned2010-07-28T23:50:15Zen_AU
dc.date.available2010-07-28T23:50:15Zen_AU
dc.date.issued2010-07en_AU
dc.date.statistics2010-07en_AU
dc.description.abstractA comparison exercise for data analysis was recently conducted by the Liquid Scintillation Counting Working Group (LSCWG) of the International Committee on Radionuclide Metrology (ICRM) to evaluate the uncertainties involved in applying different analysis methodologies (including computer programs) for the triple-to-double coincidence ratio (TDCR) method. The goals of the comparison were to (1) study differences in calculation results from different TDCR analysis programs, (2) investigate differences in analysis techniques and uncertainty assessment philosophies between laboratories, and (3) study the effect of not taking asymmetry of photomultiplier tube (PMT) efficiencies into account on the calculated activity. To achieve this, a single set of TDCR data for the pure beta emitter 99Tc, was distributed to the participants, who analyzed the data according to their normal procedures and report the activity concentration of the 99Tc solution from their results. The results indicate that the presently used programs are generally able to calculate the same activity values, assuming that the correct input parameters are used and that not taking PMT asymmetry into account in the calculations can lead to significant (0.6% for 99Tc) errors in reported results. The comparison also highlighted the need for a more rigorous approach to estimating and reporting uncertainties. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationZimmerman, B. E., Altzitzoglou, T., Rodrigues, D., Broda, R., Cassette, P., Mo, L., Ratel, G., Simpson, B., van Wyngaardt, W. M., Watjen, C. (2010). Comparison of triple-to-double coincidence ratio (TDCR) efficiency calculations and uncertainty assessments for Tc-99. Paper presented to the 17th International Conference on Radionuclide Metrology and its Applications (ICRM 2009), 7th - 11th September 2009. Slovak Institute of Metrology: Bratislava, Slovak Republic. In Applied Radiation and Isotopes, 68(7-8), 1477-1481. doi:10.1016/j.apradiso.2009.11.046en_AU
dc.identifier.conferenceenddate11 September 2009en_AU
dc.identifier.conferencename17th International Conference on Radionuclide Metrology and its Applications (ICRM 2009)en_AU
dc.identifier.conferenceplaceBratislava, Slovak Republicen_AU
dc.identifier.conferencestartdate7 September 2009en_AU
dc.identifier.govdoc2041en_AU
dc.identifier.issn0969-8043en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.apradiso.2009.11.046en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1941en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectUncertainty principleen_AU
dc.subjectTechnetium 99en_AU
dc.subjectCoincidence methodsen_AU
dc.subjectPhotomultipliersen_AU
dc.subjectData analysisen_AU
dc.subjectAsymmetryen_AU
dc.titleComparison of triple-to-double coincidence ratio (TDCR) efficiency calculations and uncertainty assessments for Tc-99en_AU
dc.typeConference Paperen_AU
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