BIPM.RI(II)-K1.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.
Results in absolute values
BIPM.RI(II)-K1.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
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 in relative values
BIPM.RI(II)-K1.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
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 |
||
| IRA | -0.05 | 0.06 | ||
| NPL | -0.03 | 0.07 | ||
| PTB | -0.05 | 0.06 | ||
| NMISA | 0.01 | 0.08 | ||
| CIEMAT | -0.06 | 0.07 | ||
| LNE-LNHB | -0.07 | 0.08 | ||
| CMI-IIR | -0.02 | 0.14 | ||
| IRMM | -0.05 | 0.06 |
Results in absolute values
BIPM.RI(II)-K1.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
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 | 9.04 | 7.03 | ||
| IRA | -5.02 | 6.02 | ||
| NPL | -3.01 | 7.03 | ||
| PTB | -5.02 | 6.02 | ||
| NMISA | 1.00 | 8.03 | ||
| CIEMAT | -6.02 | 7.03 | ||
| LNE-LNHB | -7.03 | 8.03 | ||
| CMI-IIR | -2.01 | 14.1 | ||
| IRMM | -5.02 | 6.02 |
Results in relative values
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Ho-166m |
| Time of measurements | 1989 - |
| 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 First results published on 23 May 2003 Most recent update: 29 April 2020 Earlier reports and the status of not yet completed resulsts 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 | Carine Michotte +33 (0) 1 45 07 70 85 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2006 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 1989 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 1999 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 2017 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 2009 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2015 |
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BIPM.RI(II)-K1.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
Key comparison reference value xR is the SIR reference value for this radionuclide where xR = 9.959 MBq, with a standard uncertainty uR = 0.022 MBq (see section 4.1 of the Final Report). xi is the equivalent activity for 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. With n the number of laboratories, Ui = 2[(1 - 2/n)ui2 + (1/n2)Σui2]1/2 when each laboratory has contributed 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.
The value xi is the equivalent activity for laboratory i participant in EURAMET.RI(II)-K2.Ho-166m, having been normalized to the value of PTB as the linking laboratory.
The degree of equivalence of laboratory i participant in EURAMET.RI(II)-K2.Ho-166m with respect to the key comparison 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 as none of these laboratories contributed to the computation of the key comparison reference value xR.
These statements make it possible to extend the BIPM.RI(II)-K1.Ho-166m table of equivalence to participants in EURAMET.RI(II)-K2.Ho-166m.
BIPM.RI(II)-K1.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
xi : result of measurement carried out in the SIR for the sample submitted by laboratory i
ui : combined standard uncertainty of xi
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| IRA | 9 913 | 26 | 2006-12-22 | |
| NPL | 9 932 | 30 | 2009-03-02 | |
| PTB | 9 912 | 28 | 2013-03-01 | |
| NMISA | 9 973 | 40 | 2017-09-15 |
xi : result of measurement carried out by laboratory i converted to the equivalent activity through the PTB
ui : combined standard uncertainty of xi
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| CIEMAT | 9 901 | 29 | 2013-06-25 | |
| LNE-LNHB | 9 890 | 32 | 2013-06-26 | |
| CMI-IIR | 9 944 | 66 | 2013-07-11 | |
| IRMM | 9 910 | 20 | 2013-08-23 |
