BIPM.RI(II)-K1.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
BIPM.RI(II)-K1.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 | ||
| BelGIM | 4 | 48 | ||
| CENTIS-DMR | -13 | 27 |
Results in absolute values
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Am-241 |
| Time of measurements | 1977 - |
| 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 Results last updated on 04 July 2024 |
| 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 |
| 1977 |
| BFKH |
Government Office of the Capital City Budapest, Hungary, EURAMET |
| 1979 |
comparison carried out with MKEH (Hungarian Trade Licensing Office) |
| 2009 |
comparison carried out with MKEH (Hungarian Trade Licensing Office) |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| 1979 |
comparison carried out with CMI-IIR (Czech Metrology Institute - Inspectorate for Ionizing Radiation) |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| 2011 |
Report in progress, Draft B |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 2011 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1980 | |
| 2002 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2009 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1978 |
| PTKMR-BATAN |
Center for Technology of Radiation Safety and Metrology, National Nuclear Energy Agency, Indonesia, APMP |
| 1989 |
comparison carried out with P3KRBiN (Pusat Penelitian & Pengembangan Keselamatan Radiasi & Biomedika Nuklir) |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 2006 |
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BIPM.RI(II)-K1.Am-241 and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND SIR equivalent activity of 241Am
BIPM.RI(II)-K1.Am-241
Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is xR = 2055.8 MBq, with a standard uncertainty uR = 2.8 MBq
(see Section 4.1 of the BIPM.RI(II)-K1.Am-241 Final report dated November 2007).
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. 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.
Linking COOMET.RI(II)-K2.Am-241 to BIPM.RI(II)-K1.Am-241
The value xi is the equivalent activity for laboratory i participant in COOMET.RI(II)-K2.Am-241 having been normalized using the SIR measurement of the VNIIM solution of the COOMET.RI(II)-K2 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 key comparison reference value.
These statements make it possible to extend the BIPM.RI(II)-K1.Am-241 graph of equivalence to all participants in the COOMET.RI(II)-K2.Am-241 comparison.
BIPM.RI(II)-K1.Am-241 and 2006 COOMET.RI(II)-K2.Am-241
MEASURAND SIR equivalent activity of 241Am
xi measured mass fraction reported by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Am-24
| Labi | xi | ui | Date of measurement | |
| MBq | MBq | |||
| VNIIM | 2052.6 | 7.7 | 2006-08-03 | |
| POLATOM | 2060.0 | 12.0 | 2009-01-28 | |
| MKEH | 2038.0 | 4.3 | 2009-02-25 | |
| LNE-LNHB | 2042.7 | 5.8 | 2011-05-05 |
COOMET.RI(II)-K2.Am-241
| Labi | xi | ui | Date of measurement | |
| MBq | MBq | |||
| BelGIM | 2060 | 24 | 2006-06-01 | |
| CENTIS-DMR | 2043 | 13 | 2006-06-01 |
