BIPM.RI(II)-K1.Ce-139 and APMP.RI(II)-K2.Ce-139
MEASURAND SIR equivalent activity of Ce-139
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.Ce-139
MEASURAND SIR equivalent activity of Ce-139
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.Ce-139 and APMP.RI(II)-K2.Ce-139
MEASURAND SIR equivalent activity of Ce-139
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 |
||
| NMIJ | -0.03 | 0.65 | ||
| PTB | -0.16 | 0.63 | ||
| BEV | -1.2 | 2.4 | ||
| NMISA | 1.0 | 1.4 | ||
| LNE-LNHB | -0.03 | 0.98 | ||
| INER | 0.1 | 1.0 | ||
| KRISS | -0.9 | 1.1 | ||
| NIM | 2.0 | 1.5 | ||
| VNIIM | 0.29 | 0.63 |
Results given in absolute values.
BIPM.RI(II)-K1.Ce-139
MEASURAND SIR equivalent activity of Ce-139
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 |
||
| NMIJ | -0.2 | 4.9 | ||
| PTB | -1.2 | 4.7 | ||
| BEV | -9 | 18 | ||
| NMISA | 8 | 11 | ||
| LNE-LNHB | -0.2 | 7.4 | ||
| INER | 0.8 | 7.5 | ||
| KRISS | -6.6 | 8.3 | ||
| NIM | 15 | 11 | ||
| VNIIM | 2.2 | 4.7 |
This is the possibility to place a comment.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Ce-139 |
| Time of measurements | 1976 - |
| 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 Most recent results published on 27 September 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 |
| 1976 | |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2008 |
| BFKH |
Government Office of the Capital City Budapest, Hungary, EURAMET |
| 1984 |
Országos Mérésügyi Hivatal (OMH), now BFKH |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| 1985 |
Czech Metrology Institute - Inspectorate for Ionizing Radiation (CMI-IIR), now represented by CMI |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2000 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 1976 |
Korea Atomic Energy (KAE), now represented by KRISS. |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 2022 |
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 1997 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 1997 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2004 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 2019 |
|
| 1999 |
Council for Scientific and Industrial Research, National Metrology Laboratory (CSIR-NML), now represented by NMISA |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1981 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2008 | |
| 1999 |
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BIPM.RI(II)-K1.Ce-139 and APMP.RI(II)-K2.Ce-139
MEASURAND SIR equivalent activity of Ce-139
The key comparison reference value xR for this radionuclide is estimated to be
xR = 132.77 MBq with a standard uncertainty uR = 0.14 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.
Linking APMP.RI(II)-K2.Ce-139 to BIPM.RI(II)-K1.Ce-139
The results of APMP.RI(II)-K2.Ce-139 were linked to BIPM.RI(II)-K1.Ce-139 via SIR.
BIPM.RI(II)-K1.Ce-139 and APMP.RI(II)-K2.Ce-139
MEASURAND SIR equivalent activity of Ce-139
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Ce-139
| Labi | xi | u(xi) | Date of measurement | |
| MBq | MBq | |||
| NMIJ | 132.74 | 0.35 | 2004-03-16 | |
| PTB | 132.61 | 0.34 | 2008-03-14 | |
| BEV | 131.6 | 1.2 | 2008-12-02 | |
| NMISA | 133.81 | 0.73 | 2019-03-07 | |
| LNE-LNHB | 132.74 | 0.51 | 2022-03-16 | |
APMP.RI(II)-K2.Ce-139
| Labi | xi | u(xi) | Date of measurement | |
| MBq | MBq | |||
| INER | 132.88 | 0.48 | 2004 | |
| KRISS | 131.89 | 0.53 | 2004 | |
| NIM | 134.74 | 0.74 | 2004 | |
| VNIIM | 133.06 | 0.28 | 2004 | |
