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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/1627

Title: Radioactivity standardization in South Africa
Authors: Simpson, BRS
Keywords: South Africa
Radioactivity measurement standards
Liquid scintillation coincidence counting
Ionization chamber radionuclide factors
Issue Date: Jan-2002
Publisher: Pergamon-Elsevier Science Ltd
Citation: Simpson, BRS. 2001. Radioactivity standardization in South Africa. Applied Radiation and Isotopes, vol. 56, 02 January, pp 301-305
Abstract: 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.
URI: http://hdl.handle.net/10204/1627
ISSN: 0969-8043
Appears in Collections:Metrology
General science, engineering & technology

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