In 2019, the IRA (Switzerland) submitted a sample of ¹⁶¹Tb to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures (BIPM), with comparison identifier BIPM.RI(II)- K1.Tb-161. As IRA is the first participant in the comparison no key comparison reference value (KCRV) and no degrees of equivalence can be calculated.

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.

The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

2019 年，IRA（瑞士）向国际参考系统 (SIR ) 提交了一份¹⁶¹ Tb的样本，用于在国际计价局 (BIPM) 进行活动比较，比较标识符为 BIPM.RI(II)-K1.Tb -161。由于 IRA 是比较的第一个参与者，因此无法计算关键比较参考值 (KCRV) 和等效度。

要访问本文的正文，请单击最终报告。请注意，此文本出现在 BIPM 密钥比较数据库 kcdb.bipm.org/ 的附录 B 中。

根据 CIPM 互认安排 (CIPM MRA) 的规定，最终报告已通过同行评审并由 CCRI 批准发布。