在美国国家标准与技术研究院（NIST）进行的国际计量局（BIPM）放射性计量（RI）（II）-K4.F-18和BIPM.RI（II）-K4.Cu-64持续比对中，对放射性核素氟（F）和铜（Cu）的活度测量。
Activity measurements of the radionuclides F and Cu for the NIST, USA in the ongoing comparisons BIPM.RI(II)-K4.F-18 and BIPM.RI(II)-K4.Cu-64.
作者信息
Michotte C, Nonis M, Bergeron D, Cessna J, Fitzgerald R, Pibida L, Zimmerman B, Fenwick A, Ferreira K, Keightley J, Da Silva I
机构信息
Bureau International des Poids et Mesures (BIPM).
National Institute of Standards and Technology (NIST), USA.
出版信息
Metrologia. 2017;54(1A). doi: https://doi.org/10.1088/0026-1394/54/1a/06011.
In 2016, comparisons of activity measurements of F and Cu using the Transfer Instrument of the International Reference System (SIRTI) took place at the National Institute of Standards and Technology (NIST, USA). This is the first SIRTI comparison for Cu. Ampoules containing about 27 kBq of F and 100 kBq of Cu solutions were measured in the SIRTI for about 5 and 1.5 half-lives, respectively. The NIST standardized the activity in the ampoules by ionization chamber measurements traceable to 4π(LS)β-γ anticoincidence measurements. The comparisons, identifiers BIPM.RI(II)-K4.F-18 and BIPM.RI(II)-K4.Cu-64, are linked to the corresponding BIPM.RI(II)-K1.F-18 and BIPM.RI(II)-K1.Cu-64 comparisons and degrees of equivalence with the respective key comparison reference values have been evaluated. The NIST replaces its earlier degree of equivalence for F obtained in the frame of the CCRI(II)-K3.F-18 comparison in 2001.
2016年，在美国国家标准与技术研究院（NIST）对使用国际参考系统转移仪器（SIRTI）进行的氟和铜活度测量进行了比较。这是首次针对铜的SIRTI比较。分别在SIRTI中对含有约27 kBq氟溶液和100 kBq铜溶液的安瓿进行了约5个和1.5个半衰期的测量。NIST通过可追溯到4π(LS)β-γ反符合测量的电离室测量对安瓿中的活度进行了标准化。这些比较，标识符为BIPM.RI(II)-K4.F-18和BIPM.RI(II)-K4.Cu-64，与相应的BIPM.RI(II)-K1.F-18和BIPM.RI(II)-K1.Cu-64比较相关联，并且已经评估了与各自关键比较参考值的等效程度。NIST取代了其在2001年CCRI(II)-K3.F-18比较框架中获得的早期氟等效程度。
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