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 |
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| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Ce-139 |
| Time of measurements | 2004 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Activity concentration in kBq/g |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments | Results published on 08 September 2005 APMP.RI(II)-K2.Ce-139 results are linked to those of BIPM.RI(II)-K1.Ce-139 Equivalent activity of 139Ce |
| Pilot institute |
NMIJ AIST
National Metrology Institute of Japan Japan |
| Contact person | Y. Hino +81 298 61 5667 |
| Pilot laboratory | |
|---|---|
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIM |
National Institute of Metrology, China, APMP |
| NRSL/INER |
Institute of Nuclear Energy Research, Chinese Taipei, APMP |
| OAP |
Office of Atoms for Peace, Thailand, APMP |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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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 | |
