BIPM.RI(II)-K1.Cu-64 and BIPM.RI(II)-K4.Cu-64
MEASURAND Equivalent activity of Cu-64
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.
MEASURAND Equivalent activity of Cu-64
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.Cu-64 and BIPM.RI(II)-K4.Cu-64
MEASURAND Equivalent activity of Cu-64
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 | 0.41 | 0.80 | ||
| CMI-IIR | -1.2 | 1.4 | ||
| NPL | 0.0 | 1.0 | ||
| LNE-LNHB | 0.3 | 1.2 | ||
| ENEA-INMRI | -0.2 | 1.4 | ||
| NIST | -0.4 | 1.2 | ||
| POLATOM | 0.6 | 1.2 | ||
| NRC | 0.9 | 2.3 |
Results given in absolute values.
MEASURAND Equivalent activity of Cu-64
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 | 5 | 10 | ||
| CMI-IIR | -15 | 18 | ||
| NPL | 1 | 12 | ||
| LNE-LNHB | 3 | 14 | ||
| ENEA-INMRI | -2 | 17 | ||
| NIST | -6 | 15 | ||
| POLATOM | 7 | 14 | ||
| NRC | 11 | 28 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Cu-64 |
| Time of measurements | 2016 - |
| Status | Continuous, approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | SIR-TI equivalent activity in kBq |
| Transfer device | SIR Transfer Instrument |
| 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 SIR-TI: SIR Transfer Instrument Most recent results published on 31 January 2023 The status for not yet completed comparisons is indicated in "Participants". First results published on 22 November 2017 |
| 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 |
| 2017 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 2022 |
Measurements complete |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2016 |
| NRC |
National Research Council, Canada, SIM |
| 2017 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2016 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2021 |
Measurements complete |
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BIPM.RI(II)-K1.Cu-64 and BIPM.RI(II)-K4.Cu-64
MEASURAND Equivalent activity of Cu-64
Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is xR = 80.99 MBq with a standard uncertainty uR = 0.34 MBq
5see the most recent KCRV update, Section 4 of Metrologia 2013 50 Tech. Suppl. 06021). The value xi is taken as the equivalent activity for a laboratory i.
The degree of equivalence of each laboratory i 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 + u2R)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 its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
Linking BIPM.RI(II)-K4.Cu-64 to BIPM.RI(II)-K1.Cu-64
The value xi is the SIRTI equivalent activity for laboratory i participant in BIPM.RI(II)-K4.Cu-64 multiplied by the linking factor to BIPM.RI(II)-K1.Cu-64.
The degree of equivalence of laboratory i participant in BIPM.RI(II)-K4.F-18 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. The approximation Ui = 2(ui2 + uR2)1/2 is used in the following table.
These statements make it possible to extend the BIPM.RI(II)-K1.F-18 matrices of equivalence to all participants in the BIPM.RI(II)-K4.Cu-64 comparisons
BIPM.RI(II)-K1.Cu-64 and BIPM.RI(II)-K4.Cu-64
MEASURAND Equivalent activity of Cu-64
xi result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Cu-64
| Labi | xi | ui | Date of measurement | |
| MBq | MBq | |||
| PTB | 81.40 | 0.39 | 2009-02-12 | |
| CMI-IIR | 79.75 | 0.79 | 2009-09-16 | |
| NPL | 81.03 | 0.51 | 2009-11-18 | |
| LNE-LNHB | 81.27 | 0.63 | 2010-03-18 | |
| ENEA-INMRI | 80.82 | 0.61 | 2011-10-14 |
BIPM.RI(II)-K4.Cu-64
| Labi | xi | ui | Date of measurement | |
| MBq | MBq | |||
| NIST | 80.54 | 0.50 | May 2016 | |
| POLATOM | 81.58 | 0.48 | Oct. 2016 | |
| NRC | 81.9 | 1.1 | Jun. 2017 |
