CCRI(II)-K2.Am-241 was archived on 1 July 2024
BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND SIR equivalent activity of 241Am
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
CCRI(II)-K2.Am-241 was archived on 1 July 2024
BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND SIR equivalent activity of 241Am
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 |
||
| VNIIM | -3 | 14 | ||
| POLATOM | 4 | 25 | ||
| MKEH | -18 | 11 | ||
| LNE-LNHB | -13 | 13 | ||
| BIPM | 4 | 11 | ||
| CIEMAT | 5 | 13 | ||
| CMI-IIR | 2 | 11 | ||
| CNEA | -6 | 13 | ||
| IFIN-HH | 24 | 17 | ||
| ININ | 5 | 101 | ||
| JRC | 3 | 9 | ||
| KRISS | 5 | 14 | ||
| LNMRI/IRD | 20 | 10 | ||
| NIST | -1 | 11 | ||
| NMIJ | 4 | 13 | ||
| NMISA | 10 | 9 | ||
| PTB | -1 | 11 | ||
| SMU | 22 | 51 | ||
| BelGIM | 4 | 48 | ||
| CENTIS-DMR | -13 | 27 |
Results in absolute values
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity concentration of the same Am-241 solution |
| Time of measurements | 2003 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Activity concentration |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | CCRI (Consultative Committee for Ionizing Radiation) |
| Comments | Results of this key comparison are older than 20 years and were thus deleted from the KCDB in July 2024 following the decision of the CCRI(II) at its 18th meeting in 2003 (see pages 37 and 38 of the CCRI Report of its 18th meeting in 2003) to gradually phase out old data to ensure that the KCDB maintains its currency. For the same reason, this comparison was placed in the KCDB archives on 1 July 2024. SIR equivalent activity of the radionuclide 241Am: |
| 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 |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| CMI-IIR |
Czech Metrology Institute - Inspectorate for Ionizing Radiation, Czechia, EURAMET |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| ININ |
Instituto Nacional de Investigaciones Nucleares, Mexico, SIM |
| IRMM |
Institute for Reference Materials and Measurements, European Union, EURAMET |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| LNMRI |
Laboratorio Nacional de Metrologia das Radiaçoes Ionizantes, IRD, Brazil, SIM |
| MKEH |
Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
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CCRI(II)-K2.Am-241 was archived on 1 July 2024
BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND : SIR equivalent activity of 241Am
| Key comparison reference value: The SIR reference value for this radionuclide is xR = 2055.8 MBq, with a standard uncertainty uR = 2.8 MBq, see section 4.1 of the Final Report dated November 2007. |
| The degree of equivalence of laboratory i 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. With n the number of laboratories,  when each laboratory has contributed to the computation of xR. |
|
The value xi is the equivalent activity for laboratory i participant in CCRI(II)-K2.Am-241 having been normalized using the SIR measurement of the NPL undiluted solution of the CCRI(II)-K2.Am-241 comparison. |
| The degree of equivalence of laboratory i participant in CCRI(II)-K2.Am-241 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 in the Matrix of equivalence as none of these laboratories contributed to the computation of xR. |
|
The value xi is the equivalent activity for laboratory i participant in COOMET.RI(II)-K2.Am-241 having been normalized to the SIR measurement of the VNIIM solution of the COOMET.RI(II)-K2.Am-241 comparison. |
| The degree of equivalence of laboratory i participant in COOMET.RI(II)-K2.Am-241 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 in the Matrix of equivalence as none of these laboratories contributed to the computation of xR. |
These statements make it possible to extend the BIPM.RI(II)-K1.Am-241 Matrix of equivalence to all participants in the CCRI(II)-K2.Am-241 and the COOMET.RI(II)-K2.Am-241 comparisons.
CCRI(II)-K2.Am-241 was archived on 1 July 2024
BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND : SIR equivalent activity of 241Am
xi : result of measurement carried out in the SIR for the sample submitted by laboratory i
ui : combined standard uncertainty of xi
-k1.am-241_lim1.gif)
xi : result of measurement carried out at laboratory i linked to the SIR through the NPL mother solution
ui : combined standard uncertainty of xi
-k1.am-241_lim2.gif)
xi : result of measurement carried out at laboratory i converted to the equivalent activity through the VNIIM
ui : combined standard uncertainty of xi
-k1.am-241_lim3.gif)
