Update of the ongoing comparison BIPM.RI(II)-K1.Y-88 to include recent activity measurements of the radionuclide 88Y by the PTB, Germany

In 2008, to update their previous result of 1999, the Physikalisch-Technische Bundesanstalt (PTB) submitted a new sample of 88Y with an activity of about 3.8 MBq to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures (BIPM). This comparison has the identifier BIPM.RI(II)-K1.Y-88. The degree of equivalence between the equivalent activity measured in the SIR for the new PTB sample and the updated key comparison reference value (KCRV) has been calculated, as have the degrees of equivalence with each of the other participants. The results are given in the form of a matrix and a graphical presentation is also given. (authors)