Sensitivity and uncertainty analysis of the simulation of 123I and 54Mn decay in liquid scintillation vials

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dc.contributor.authorBignell, LJen_AU
dc.contributor.authorMo, Len_AU
dc.contributor.authorSmith, MLen_AU
dc.contributor.authorSteele, Ten_AU
dc.contributor.authorAlexiev, Den_AU
dc.contributor.authorHashemi-Nezhad, SRen_AU
dc.date.accessioned2010-02-09T03:26:51Zen_AU
dc.date.accessioned2010-04-30T04:57:46Zen_AU
dc.date.available2010-02-09T03:26:51Zen_AU
dc.date.available2010-04-30T04:57:46Zen_AU
dc.date.issued2009-09-10en_AU
dc.date.statistics2009-09-10en_AU
dc.description.abstractGeneral purpose, widely distributed Monte Carlo simulations for radiation transport have found many applications in the fields of radionuclide metrology, detector research and nuclear medicine. A full evaluation of the uncertainties due to the simulation of physical quantities and correction factors is required for model validation, uncertainty analysis and quality assurance, yet this evaluation is rarely explicitly carried out. The decay of the most important gamma and x-ray emissions of 123I and 54Mn in the ANSTO Triple-to-Double Coincidence Ratio (TDCR) liquid scintillation detector have been simulated using the radiation transport code Geant4. The energy deposition spectrum in the scintillant and the interaction probability for each emission has been determined. Both of these calculated quantities are required for an absolute activity measurement of these nuclides using the TDCR method. A sensitivity and uncertainty analysis of the simulation model with respect to these output parameters has been carried out and is presented here. The uncertainty in the simulation results due to the input parameter uncertainties was found to be several times larger than the statistical uncertainty component for a typical number of simulated decay events. The scintillant volume was the most sensitive input parameter to produce changes in the output quantities studied, indicating that the minimization of the uncertainty of this parameter would be most beneficial for reducing the uncertainty of the simulation outputs. The scintillant density and composition were also important, which is significant as the uncertainties associated with these input parameters are generally not well known. Estimates of the relative uncertainty associated with the simulation outputs due to the combined stochastic and input uncertainties are provided.en_AU
dc.description.sponsorshipSlovak Institute of Metrologyen_AU
dc.identifier.citationBignell, L. J., Mo, L., Smith, M. L., Steele, T., Alexiev, D., & Hashemi-Nezhad, S. R. (2009). Sensitivity and uncertainty analysis of the simulation of 123I and 54Mn decay in liquid scintillation vials. Presentation to the ICRM2009: 17th International Conference on Radionuclide Metrology and its Applications (O-065), 7th – 11th September 2009. Bratislava, Slovakia: Slovak Institute of Metrology. In Applied Radiation and Isotopes, 68(7), 1495-1502. doi:10.1016/j.apradiso.2009.11.051en_AU
dc.identifier.conferenceenddate11 September 2009en_AU
dc.identifier.conferencenameICRM2009: 17th International Conference on Radionuclide Metrology and its Applicationsen_AU
dc.identifier.conferenceplaceBratislava, Slovakiaen_AU
dc.identifier.conferencestartdate7 September 2011en_AU
dc.identifier.editorsDe Felice, P., Hino, Y., Woods, M., Simpson, B. R. S., & Švec. A.en_AU
dc.identifier.govdoc1077en_AU
dc.identifier.issue7-8en_AU
dc.identifier.journaltitleApplied Radiation and Isotopesen_AU
dc.identifier.pagination1495-1502en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2870en_AU
dc.identifier.urihttps://doi.org/10.1016/j.apradiso.2009.11.051en_AU
dc.identifier.volume68en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectManganese 54en_AU
dc.subjectIodine 123en_AU
dc.subjectDecayen_AU
dc.subjectLiquid scintillatorsen_AU
dc.subjectSimulationen_AU
dc.subjectSensitivity analysisen_AU
dc.titleSensitivity and uncertainty analysis of the simulation of 123I and 54Mn decay in liquid scintillation vialsen_AU
dc.typeConference Presentationen_AU
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