Update of the BIPM comparison BIPM.RI(II)-K1.Bi-207 of activity measurements of the radionuclide ^sup 207^Bi to include the 2010 result of the LNE-LNHB (France)

In 2010, the Laboratoire National de Metrologie et d'Essais-Laboratoire National Henri Becquerel (LNE-LNHB) submitted one sample of known activity of 207Bi to the International Reference System for activity comparison at the Bureau International des Poids et Mesures, with comparison identifier BIPM.RI(II)-K1.Bi-207. The value of the activity submitted was about 180 kBq. There is now one result in the BIPM.RI(II)-K1.Bi-207 comparison. The key comparison reference value (KCRV) has been evaluated for the first time using the LNE-LNHB result and a PTB result dating 1982. The degree of equivalence between the LNE-LNHB equivalent activity measured in the SIR and the KCRV has been calculated and is reported.