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 | Measurement of radioactivity content of same solution |
Time of measurements | 2008 |
Status | Approved |
Final Reports of the comparisons | |
References | |
Measurand | Activity per unit mass (Radionuclide: Co-57) |
Transfer device | Aliquots of stock solution distributed to participants through third-party supplier |
Comparison type | Supplementary Comparison |
Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
Conducted by | CCRI (Consultative Committee for Ionizing Radiation) |
Comments | |
Pilot institute |
IAEA
International Atomic Energy Agency IAEA - International Organization |
Contact person | S. Palm |
Pilot laboratory | |
---|---|
IAEA |
International Atomic Energy Agency, IAEA - International Organization, SIM |
BARC |
Bhabha Atomic Research Centre, India, APMP |
IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
NIST |
National Institute of Standards and Technology, United States, SIM |
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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 | |