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 | 1999 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Activity |
| Transfer device | Radioactive solution |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments | First results published on 23 May 2003, then updated on 31 May 2009 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 |
NMIJ AIST
National Metrology Institute of Japan Japan |
| Contact person | Y. Hino +81 298 61 5667 |
| Pilot laboratory | |
|---|---|
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| LNMRI |
Laboratorio Nacional de Metrologia das Radiaçoes Ionizantes, IRD, Brazil, SIM |
| NIM |
National Institute of Metrology, China, APMP |
| NML-SIRIM |
National Metrology Laboratory, SIRIM Berhad (became NMIM), Malaysia, APMP |
| NRSL/INER |
Institute of Nuclear Energy Research, Chinese Taipei, APMP |
| OAP |
Office of Atoms for Peace, Thailand, APMP |
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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)
