Comparison
Comparison close
Results

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

Comparison
Comparison close
Results

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

EURAMET.RI(II)-K2.Ho-166m
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

EURAMET.RI(II)-K2.Ho-166m Technical Protocol

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
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

CIEMAT

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Spain, EURAMET

CMI

Czech Metrology Institute, Czechia, EURAMET

LNE-LNHB

Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET

Comparison
Comparison close
Results

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 BIPM.RI(II)-K1.Ho-166m

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 - 2w)ui2uR]1/2 when each laboratory has contributed to the calculation of xR.

 

  • Linking APMP.RI(II)-K2.Ho-166m and EURAMET.RI(II)-K2.Ho-166m to BIPM.RI(II)-K1.Ho-166m

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.

Comparison
Comparison close
Results

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 BIPM.RI(II)-K1.Ho-166m

xi : result of measurement carried out in the SIR for the sample submitted by laboratory i
ui : combined standard uncertainty of xi

 

  • Key comparison APMP.RI(II)-K2.Ho-166m

xi : result of measurement carried out by laboratory i converted to the equivalent activity through the NMIJ
ui : combined standard uncertainty of xi

 

  • Key comparison EURAMET.RI(II)-K2.Ho-166m

xi : result of measurement carried out by laboratory i converted to the equivalent activity through the PTB
ui : combined standard uncertainty of xi