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Report of the CIPM Key Comparison CCRI(II)-K2.Y-90

2005; IOP Publishing; Volume: 42; Issue: 1A Linguagem: Inglês

10.1088/0026-1394/42/1a/06001

1681-7575

Brian E. Zimmerman, G Ratel,

Radioactive contamination and transfer

An international comparison of the pure β-emitter 90Y has been performed recently, with comparison identifier, CCRI(II)-K2.Y-90. A total of eight laboratories performed assays for radioactivity content on aliquots of a common master solution of 90Y prepared by the National Institute of Standards and Technology (NIST). The average activity concentration of the solution measured by the laboratories was 8664 kBq g-1; u = 4 kBq g-1 at a reference time of 0 h UTC 1 November 2003. Using this value as the key comparison reference value, degrees of equivalence and their associated uncertainties have been calculated and the results are given in the form of a matrix for the eight participants. A graphical presentation is also given.