BIPM.RI(II)-K1.Ho-166m, APMP.RI(II)-K2.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
Degrees of equivalence relative to the key comparison reference value: Di and Ui, expressed in MBq
-K1.Ho-166m-G.PNG)
BIPM.RI(II)-K1.Ho-166m, APMP.RI(II)-K2.Ho-166m and EURAMET.RI(II)-K2.Ho-166m
MEASURAND Equivalent activity of 166mHo
Degrees of equivalence relative to the key comparison reference value: Di and Ui, expressed in MBq
-K1.Ho-166m-DoE.PNG)
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Ho-166m |
| Time of measurements | 2013 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Activity concentration of the same Ho-166m solution, nominal activity per mass: about 125 kBq/g |
| Transfer device | Solution of radionuclide Ho-166m |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| RMO Internal Identifier | EURAMET Project No 1257 |
| Comments | Results published on 16 December 2014 APMP.RI(II)-K2.Ho-166m and EURAMET.RI(II)-K2.Ho-166m results are linked to those of BIPM.RI(II)-K1.Ho-166m SIR equivalent activity of the radionuclide 166Hom
|
| Pilot institute |
PTB
Physikalisch-Technische Bundesanstalt Germany |
| Contact person | K. Kossert +49 531 592 6110 |
| Pilot laboratory | |
|---|---|
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| CIEMAT |
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| IRMM |
Institute for Reference Materials and Measurements, European Union, EURAMET |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
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BIPM.RI(II)-K1.Ho-166m, APMP.RI(II)-K2.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 - 2wi )ui2 + uR2 ]1/2 when each laboratory has contributed to the calculation of xR.
The value xi is the equivalent activity for laboratory i participant in APMP.RI(II)-K2.Ho-166m or EURAMET.RI(II)-K2.Ho-166m, having been normalized to the value of the NMIJ for APMP, or the PTB for EURAMET, as the linking laboratory.
The degree of equivalence of laboratory i participant in the APMP or EURAMET key comparison 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 APMP.RI(II)-K2.Ho-166m and EURAMET.RI(II)-K2.Ho-166m.
BIPM.RI(II)-K1.Ho-166m, APMP.RI(II)-K2.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
-K1.Ho-166m-LIM.PNG)
xi : result of measurement carried out by laboratory i converted to the equivalent activity through the NMIJ
ui : combined standard uncertainty of xi
-K2.Ho-166m-LIM.PNG)
xi : result of measurement carried out by laboratory i converted to the equivalent activity through the PTB
ui : combined standard uncertainty of xi
-K2.Ho-166m-LIM.PNG)
