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 concentration of the same Am-241 solution |
| Time of measurements | 2006 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Activity concentration of the same solution Nominal value: 500 kBq/g |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | COOMET (Euro-Asian Cooperation of National Metrological Institutions) |
| RMO Internal Identifier | COOMET 359/RU/06 |
| Comments | Results published on 01 November 2007 COOMET.RI(II)-K2.Am-241 results are linked to those of BIPM.RI(II)-K1.Am-241 SIR equivalent activity of the radionuclide 241Am: |
| Pilot institute |
VNIIM
D.I. Mendeleyev Institute for Metrology, Rosstandart Russian Federation |
| Contact person | I.A. Kharitonov +7 812 323 96 11 |
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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 |
