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dc.contributor.author Simpson, BRS en_US
dc.date.accessioned 2007-02-08T06:52:42Z en_US
dc.date.accessioned 2007-06-07T10:07:40Z
dc.date.available 2007-02-08T06:52:42Z en_US
dc.date.available 2007-06-07T10:07:40Z
dc.date.copyright en_US
dc.date.issued 2002-01 en_US
dc.identifier.citation Simpson, BRS. 2001. Radioactivity standardization in South Africa. Applied Radiation and Isotopes, vol. 56, 02 January, pp 301-305 en_US
dc.identifier.issn 0969-8043 en_US
dc.identifier.uri http://hdl.handle.net/10204/1627 en_US
dc.identifier.uri http://hdl.handle.net/10204/1627
dc.description.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. en_US
dc.format.extent 108073 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en en_US
dc.publisher Pergamon-Elsevier Science Ltd en_US
dc.rights Copyright: 2002 Pergamon-Elsevier Science Ltd. en_US
dc.source en_US
dc.subject South Africa en_US
dc.subject Radioactivity measurement standards en_US
dc.subject Liquid scintillation coincidence counting en_US
dc.subject Ionization chamber radionuclide factors en_US
dc.title Radioactivity standardization in South Africa en_US
dc.type Article en_US


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