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

APMP.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 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
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
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

NIM

National Institute of Metrology, China, APMP

NRSL/INER

Institute of Nuclear Energy Research, Chinese Taipei, APMP

OAP

Office of Atoms for Peace, Thailand, APMP

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