Simpson, BRS2007-02-082007-06-072007-02-082007-06-072002-01Simpson, BRS. 2001. Radioactivity standardization in South Africa. Applied Radiation and Isotopes, vol. 56, 02 January, pp 301-3050969-8043http://hdl.handle.net/10204/1627http://hdl.handle.net/10204/1627South Africa's national radioactivity measurement standard is maintained at a satellite laboratory in Cape Town by the National Metrology Laboratory (NML) of the Council-for Scientific and Industrial Research. Standardizations are undertaken by a number of direct methods utilizing liquid scintillation counting (LSC). The successful application of LSC to the 4pibeta-gamma coincidence method is reviewed. The activity unit is maintained through radionuclide specific calibration factors relating to a pressurized re-entrant well type ionization chamber. A comparison is made between normalized factors given by the manufacturer and deduced factors obtained by a method used to transfer calibration factors from the International Reference System of the International Bureau of Weights and Measures based on the NML's own absolute standardizations.108073 bytesapplication/pdfenCopyright: 2002 Pergamon-Elsevier Science Ltd.South AfricaRadioactivity measurement standardsLiquid scintillation coincidence countingIonization chamber radionuclide factorsArticleSimpson, B. (2002). Radioactivity standardization in South Africa. http://hdl.handle.net/10204/1627Simpson, BRS "Radioactivity standardization in South Africa." (2002) http://hdl.handle.net/10204/1627Simpson B. Radioactivity standardization in South Africa. 2002; http://hdl.handle.net/10204/1627.TY - Article AU - Simpson, BRS AB - South Africa's national radioactivity measurement standard is maintained at a satellite laboratory in Cape Town by the National Metrology Laboratory (NML) of the Council-for Scientific and Industrial Research. Standardizations are undertaken by a number of direct methods utilizing liquid scintillation counting (LSC). The successful application of LSC to the 4pibeta-gamma coincidence method is reviewed. The activity unit is maintained through radionuclide specific calibration factors relating to a pressurized re-entrant well type ionization chamber. A comparison is made between normalized factors given by the manufacturer and deduced factors obtained by a method used to transfer calibration factors from the International Reference System of the International Bureau of Weights and Measures based on the NML's own absolute standardizations. DA - 2002-01 DB - ResearchSpace DP - CSIR KW - South Africa KW - Radioactivity measurement standards KW - Liquid scintillation coincidence counting KW - Ionization chamber radionuclide factors LK - https://researchspace.csir.co.za PY - 2002 SM - 0969-8043 T1 - Radioactivity standardization in South Africa TI - Radioactivity standardization in South Africa UR - http://hdl.handle.net/10204/1627 ER -