BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57
MEASURAND SIR equivalent activity of Co-57
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.
Results given in absolute values.
BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57
MEASURAND SIR equivalent activity of Co-57
Degrees of equivalence represented by Di = (xI - xR) / xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
Results given in relative values.
BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57
MEASURAND SIR equivalent activity of Co-57
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
MBq |
MBq |
MBq |
||
| PTB | 0.4 | 1.1 | ||
| NMIJ | -0.5 | 1.1 | ||
| LNE-LNHB | -0.42 | 0.93 | ||
| NIST | -0.1 | 1.2 | ||
| POLATOM | 1.2 | 1.5 | ||
| NMISA | 1.65 | 0.96 | ||
| CMI | -0.4 | 1.7 | ||
| BARC | 3.6 | 1.3 | ||
| IFIN-HH | 0.2 | 2.6 | ||
| LNMRI/IRD | 3.5 | 1.3 |
Results given in absolute values.
BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57
MEASURAND SIR equivalent activity of Co-57
Degrees of equivalence represented by Di = (xI - xR) / xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
kBq/MBq |
kBq/MBq |
kBq/MBq |
||
| PTB | 2.5 | 6.8 | ||
| NMIJ | -3.0 | 6.5 | ||
| LNE-LNHB | -2.5 | 5.5 | ||
| NIST | -0.4 | 7.3 | ||
| POLATOM | 7.0 | 8.6 | ||
| NMISA | 9.8 | 5.7 | ||
| CMI | -2 | 10 | ||
| BARC | 21.1 | 7.7 | ||
| IFIN-HH | 1 | 16 | ||
| LNMRI/IRD | 20.8 | 7.7 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Co-57 |
| Time of measurements | 1978 - |
| Status | Continuous, approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | SIR equivalent activity |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | BIPM (Bureau International des Poids et Mesures) |
| Comments | SIR: Système International de Référence, International Reference System First results published on 10 February 2003 Most recent results published on 18 August 2022 |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Carine Michotte +33 (0) 1 45 07 70 85 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| ANSTO |
Australian Nuclear Science and Technology Organisation, Australia, APMP |
| 1978 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 1998 | |
| 2015 |
Abandonned |
| 2023 |
measurements in progress |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| 1991 | |
| 2021 |
| IAEA |
International Atomic Energy Agency, IAEA - International Organization, SIM |
| 1979 |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| 2008 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2000 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 1999 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 1999 | |
| 2007 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2002 | |
| 2010 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 1996 | |
| 2004 | |
| 2006 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 1985 | |
| 2015 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1976 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2013 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1983 | |
| 2005 |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 1992 |
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BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57
MEASURAND SIR equivalent activity of Co-57
The key comparison reference value xR for this radionuclide is estimated to be
xR = 168.99 MBq with a standard uncertainty uR = 0.25 MBq
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence are both expressed in MBq, where xi is the equivalent activity for laboratory i.
The Degrees of equivalence are also given in relative terms by Di = (xI - xR) /xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
BIPM.RI(II)-K1.Co-57 and CCRI(II)-S6.Co-57
MEASURAND SIR equivalent activity of Co-57
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Co-57
| Labi | xi | u(xi) | Date of measurement | |
| MBq | MBq | |||
| PTB | 169.42 | 0.56 | 2005-03-31 | |
| NMIJ | 168.48 | 0.53 | 2006-09-19 | |
| LNE-LNHB | 168.57 | 0.43 | 2007-06-20 | |
| NIST | 168.92 | 0.61 | 2010-05-21 | |
| POLATOM | 170.18 | 0.73 | 2013-11-19 | |
| NMISA | 170.64 | 0.45 | 2015-09-15 | |
| CMI | 168.62 | 0.85 | 2021-12-10 | |
CCRI(II)-S6.Co-57
| Labi | xi | u(xi) | Date of measurement | |
| MBq | MBq | |||
| BARC | 172.55 | 0.60 | 2008 | |
| IFIN-HH | 169.2 | 1.3 | 2008 | |
| LNMRI/IRD | 172.50 | 0.60 | 2008 | |
