Comparison
Comparison close
Results

BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241

MEASURAND : SIR equivalent activity of 241Am
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in MBq

Red squares: participants in BIPM.RI(II)-K1.Am-241
Blue circles: participants in CCRI(II)-K2.Am-241 (2003)
Green triangles: participants in COOMET.RI(II)-K2.Am-241 (2006)

Note: the right-hand axis shows approximate relative values only

Comparison
Comparison close
Results

BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241

MEASURAND : SIR equivalent activity of 241Am

 

 

participants in

BIPM.RI(II)-K2.Am-241
participants in CCRI(II)-K2.Am-241
participants in COOMET.RI(II)-K2.Am-241

Results are presented under A4 printable format in Summary Results (.PDF file).

CCRI(II)-K2.Am-241
Metrology area, Sub-field Ionizing Radiation, Section II (Measurement of Radionuclides)
Description Activity concentration of the same Am-241 solution
Time of measurements 2003
Status Approved for equivalence
Final Reports of the comparisons
Measurand Activity concentration
Transfer device Radioactive solution
Comparison type Key Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by CCRI (Consultative Committee for Ionizing Radiation)
Comments

Results published on 01 November 2007

CCRI(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 BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person Carine Michotte

+33 (0) 1 45 07 70 85
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BIPM

Bureau International des Poids et Mesures, BIPM - International Organization, N/A

BARC

Bhabha Atomic Research Centre, India, APMP

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

CIEMAT

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

CMI-IIR

Czech Metrology Institute - Inspectorate for Ionizing Radiation, Czechia, EURAMET

CNEA

National Commission of Atomic Energy, Argentina, SIM

IFIN-HH

"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET

ININ

Instituto Nacional de Investigaciones Nucleares, Mexico, SIM

IRMM

Institute for Reference Materials and Measurements, European Union, EURAMET

KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

LNE-LNHB

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

LNMRI

Laboratorio Nacional de Metrologia das Radiaçoes Ionizantes, IRD, Brazil, SIM

MKEH

Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

NPL

National Physical Laboratory, United Kingdom, EURAMET

POLATOM

Radioisotope Centre Polatom, Poland, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

SMU

Slovensky Metrologicky Ustav, Slovakia, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

Comparison
Comparison close
Results

BIPM.RI(II)-K1.Am-241, CCRI(II)-K2.Am-241,
and COOMET.RI(II)-K2.Am-241

MEASURAND : SIR equivalent activity of 241Am

  • Key comparison BIPM.RI(II)-K1.Am-241
Key comparison reference value:
The SIR reference value for this radionuclide is xR = 2055.8 MBq, with a standard uncertainty uR = 2.8 MBq, see section 4.1 of the
Final Report dated November 2007.

 

The degree of equivalence of laboratory i 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. With n the number of laboratories, when each laboratory has contributed to the computation of xR.

 

  • Linking CCRI(II)-K2.Am-241 (2003) to BIPM.RI(II)-K1.Am-241

The value xi is the equivalent activity for laboratory i participant in CCRI(II)-K2.Am-241 having been normalized using the SIR measurement of the NPL undiluted solution of the CCRI(II)-K2.Am-241 comparison.

 

The degree of equivalence of laboratory i participant in CCRI(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 computation 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 to the SIR measurement of the VNIIM solution of the COOMET.RI(II)-K2.Am-241 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 computation of xR.

 

These statements make it possible to extend the BIPM.RI(II)-K1.Am-241 Matrix of equivalence to all participants in the CCRI(II)-K2.Am-241 and the COOMET.RI(II)-K2.Am-241 comparisons.

Comparison
Comparison close
Results

BIPM.RI(II)-K1.Am-241, 2003 CCRI(II)-K2.Am-241,
and 2006 COOMET.RI(II)-K2.Am-241

MEASURAND : SIR equivalent activity of 241Am

  • Key comparison BIPM.RI(II)-K1.Am-241

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

 

  • Key comparison CCRI(II)-K2.Am-241

xi : result of measurement carried out at laboratory i linked to the SIR through the NPL mother solution
ui : combined standard uncertainty of xi

  • Key comparison COOMET.RI(II)-K2.Am-241

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