BIPM.RI(II)-K1.Ba-133 and APMP.RI(II)-K2.Ba-133
MEASURAND Equivalent activity of 133Ba
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.Ba-133 and APMP.RI(II)-K2.Ba-133
MEASURAND Equivalent activity of 133Ba
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.Ba-133 and APMP.RI(II)-K2.Ba-133
MEASURAND Equivalent activity of 133Ba
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 |
||
| IFIN-HH | -0.31 | 0.29 | ||
| NMIJ | 0.13 | 0.22 | ||
| IRA | 0.02 | 0.23 | ||
| LNE-LNHB | -0.02 | 0.38 | ||
| BEV | 0.16 | 0.61 | ||
| NRC | -0.59 | 0.52 | ||
| TENMAK-NÜKEN | 0.0 | 1.4 | ||
| NMISA | 0.22 | 0.32 | ||
| NIST | -0.02 | 0.52 | ||
| CMI | -0.02 | 0.39 | ||
| LNMRI/IRD | 0.71 | 0.30 | ||
| ANSTO | -0.01 | 0.38 | ||
| BARC | -1.5 | 1.2 | ||
| INER | 0.12 | 0.30 | ||
| KRISS | 0.20 | 0.32 | ||
| NIM | 0.35 | 0.59 | ||
| OAP | -0.1 | 1.5 | ||
| PTKMR | 1.3 | 1.4 |
Results given in absolute values.
BIPM.RI(II)-K1.Ba-133 and APMP.RI(II)-K2.Ba-133
MEASURAND Equivalent activity of 133Ba
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 |
||
| IFIN-HH | -7.0 | 6.5 | ||
| NMIJ | 3.0 | 5.0 | ||
| IRA | 0.5 | 5.3 | ||
| LNE-LNHB | -0.4 | 8.6 | ||
| BEV | 4 | 14 | ||
| NRC | -13.0 | 12 | ||
| TENMAK-NÜKEN | 0 | 32 | ||
| NMISA | 5.0 | 7.4 | ||
| NIST | 0 | 12 | ||
| CMI | -0.4 | 8.9 | ||
| LNMRI/IRD | 16.2 | 6.9 | ||
| ANSTO | -0.2 | 8.6 | ||
| BARC | -35 | 27 | ||
| INER | 2.8 | 6.9 | ||
| KRISS | 4.6 | 7.3 | ||
| NIM | 8 | 13 | ||
| OAP | -3 | 35 | ||
| PTKMR | 30 | 33 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Ba-133 |
| Time of measurements | 1977 - |
| 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 Firts results published on 4 April 2003 Most recent results published on 27 October 2026 Earlier reports and the status of not yet completed results can be found in the participants list. Results older than 20 years are no longer considered valid (see pages 37 and 38 of the CCRI Report of its 18th meeting in 2003). |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Romain Coulon |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| 1983 | |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| 2020 |
Planned |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2012 |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| 2024 |
|
| CMI-IIR |
Czech Metrology Institute - Inspectorate for Ionizing Radiation, Czechia, EURAMET |
| 1980 |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| 1996 |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| 2005 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2009 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 1995 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 2012 |
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 1995 | |
| 2024 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2019 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2006 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 2019 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1982 |
| NRC |
National Research Council, Canada, SIM |
| 2016 |
| OMH |
Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET |
| 1996 |
| P3KRBiN |
Pusat Penelitian & Pengembangan Keselamatan Radiasi & Biomedika Nuklir, Indonesia, APMP |
| 1991 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2022 |
Measurements complete |
| TENMAK-NUKEN |
Nuclear Energy Research Institute, Türkiye, EURAMET |
| 2018 |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 1984 |
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BIPM.RI(II)-K1.Ba-133 and APMP.RI(II)-K2.Ba-133
MEASURAND Equivalent activity of 133Ba
Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is 43 898 kBq, with a standard uncertainty uR equal to 59 kBq
(see Section 4.1 of the BIPM.RI(I)-K1.Ba-133 2026 Final Report). The value xi is taken as the equivalent activity for a laboratory i.
The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (xi - xR) and Ui its expanded uncertainty (k = 2), both expressed in MBq, and
Ui = 2((1 - 2wi )ui2 + uR2 )1/2 , where wi is the weight of laboratory i contributing to the calculation of xR.
The degrees of equivalence are also given in relative terms by Di = (xi - xR) /xR and Ui /xR , both expressed in kBq/MBq.
Linking APMP.RI(II)-K2.Ba-133 to BIPM.RI(II)-K1.Ba-133
The results of participants in the comparison APMP.RI(II)-K2.Ba-133 are linked to the SIR through the measurement in the SIR of an ampoule of the same solution standardized by the NMIJ as the linking laboratory, as described in Section 5 of the APMP.RI(II)-K2.Ba-133 Final report.
BIPM.RI(II)-K1.Ba-133 and APMP.RI(II)-K2.Ba-133
MEASURAND Equivalent activity of 133Ba
xi measurement value submitted by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Ba-133
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| IFIN-HH | 43590 | 140 | 2005-12-08 | |
| NMIJ | 44030 | 100 | 2006-07-07 | |
| IRA | 43920 | 100 | 2009-04-15 | |
| LNE-LNHB | 43880 | 190 | 2012-03-07 | |
| BEV | 44060 | 300 | 2012-06-12 | |
| NRC | 43310 | 260 | 2016-01-28 | |
| TENMAK-NÜKEN | 43920 | 700 | 2018-01-10 | |
| NMISA | 44120 | 160 | 2019-03-12 | |
| NIST | 43880 | 260 | 2019-04-15 | |
| CMI | 43880 | 200 | 2024-07-15 | |
| LNMRI/IRD | 44610 | 140 | 2024-11-05 |
APMP.RI(II)-K2.Ba-133
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| ANSTO | 43890 | 180 | 2006 | |
| BARC | 42370 | 590 | 2006 | |
| INER | 44020 | 140 | 2006 | |
| KRISS | 44100 | 150 | 2006 | |
| NIM | 44250 | 290 | 2006 | |
| OAP | 43750 | 770 | 2006 | |
| PTKMR | 45220 | 720 | 2006 |
