BIPM.RI(I)-K1.Cd-109
MEASURAND Activity concentration of Cd-109
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(I)-K1.Cd-109
MEASURAND Activity concentration of Cd-109
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(I)-K1.Cd-109
MEASURAND Activity concentration of Cd-109
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 | -73 | 90 | ||
| PTB | 32 | 58 | ||
| NIST | 30 | 100 | ||
| LNE-LNHB | -100 | 160 |
Results given in absolute values.
BIPM.RI(I)-K1.Cd-109
MEASURAND Activity concentration of Cd-109
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 |
||
| IRA | -9 | 11 | ||
| PTB | 4.0 | 7.1 | ||
| NIST | 4 | 12 | ||
| LNE-LNHB | -12 | 20 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Cd-109 |
| Time of measurements | 1978 - |
| 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 30 May 2003 Most recent results published on 25 November 2021 The status for not yet completed comparisons is indicated in "Participants". |
| 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 |
| 1986 | |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 2000 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 1998 | |
| 2012 | |
| 2021 |
Report in progress, Draft A |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2004 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 1996 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1980 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1994 | |
| 2004 |
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BIPM.RI(I)-K1.Cd-109
MEASURAND Activity concentration of Cd-109
The key comparison reference value xR for this radionuclide is estimated to be
xR = 8138 MBq with a standard uncertainty uR = 26 MBq
(see Section 4 of the BIPM.RI(I)-K1.Cd-109 Final Report).
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(I)-K1.Cd-109
MEASURAND Activity concentration of Cd-109
xi result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi
ui combined standard uncertainty of xi
-K1.Cd-109 2020 LIM.png)
