title: Characterisation of reference materials for radioactivity with assigned values traceable to the SI units.
abstract: The Institute for Reference Materials and Measurements participates in an IAEA co-ordinated project to upgrade Analytical Quality Control Services intercomparison materials to reference materials. The principal objective is to ensure that assigned property values are traceable to the International System of Units. General principles and practical mechanisms for achieving this traceability are described.
authors.affiliation: European Commission, DG Joint Research Centre, Institute for Reference Materials and Measurements Retieseweg 111, Geel B-2440, Belgium. timotheos.altzitzoglou@cec.eu.int
authors.forename: T
authors.initials: T
authors.lastname: Altzitzoglou
authors.forename: G
authors.initials: G
authors.lastname: Sibbens
authors.forename: M
authors.initials: M
authors.lastname: Bickel
authors.forename: A
authors.initials: A
authors.lastname: Bohnstedt
authors.forename: J-G
authors.initials: JG
authors.lastname: Decaillon
authors.forename: C
authors.initials: C
authors.lastname: Hill
authors.forename: L
authors.initials: L
authors.lastname: Holmes