Comparison
Comparison close
Results

BIPM.RI(I)-K1.Cd-109

MEASURAND      Activity concentration of Cd-109

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.

Cd-109
Di / MBq
Participating institutes

Results given in absolute values.

 

BIPM.RI(I)-K1.Cd-109

MEASURAND      Activity concentration of Cd-109

 

Degrees of equivalence represented by Di = (xI - xR)/xand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.

Cd-109
Di / (kBq/MBq)
Participating institutes

Results given in relative values.

Comparison
Comparison close
Results

BIPM.RI(I)-K1.Cd-109

MEASURAND      Activity concentration of Cd-109

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.

LABi Di Uneg,i Upos,i
MBq
MBq
MBq
IRA -73 90
PTB 32 58
NIST 30 100
LNE-LNHB -100 160
Participating institutes
BIPM.RI(II)-K1.Cd-109

Results given in absolute values.

 

BIPM.RI(I)-K1.Cd-109

MEASURAND      Activity concentration of Cd-109

 

Degrees of equivalence represented by Di = (xI - xR)/xand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.

LABi Di Uneg,i Upos,i
kBq/MBq
kBq/MBq
kBq/MBq
IRA -9 11
PTB 4.0 7.1
NIST 4 12
LNE-LNHB -12 20
Participating institutes
BIPM.RI(II)-K1.Cd-109

Results given in relative values.

Comparison
Comparison close
BIPM comparison
Linked comparison
BIPM.RI(II)-K1.Cd-109
Metrology area, Sub-field Ionizing Radiation, Section II (Measurement of Radionuclides)
Description Activity of radionuclide Cd-109
Time of measurements 1978 -
Status Continuous, approved for equivalence
Final Reports of the comparisons
Measurand SIR equivalent activity
Transfer device Radioactive solution
Comparison type Key Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by BIPM (Bureau International des Poids et Mesures)
Comments SIR: Système International de Référence, International Reference System

First results published on 30 May 2003
Most recent results published on 25 November 2021
The status for not yet completed comparisons is indicated in "Participants".
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

CMI-IIR

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

CSIR-NML

Council for Scientific and Industrial Research, National Metrology Laboratory (became NMISA in 2007), South Africa, AFRIMETS

IRA

Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET

LNE-LNHB

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

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NPL

National Physical Laboratory, United Kingdom, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

Comparison
Comparison close
Results

BIPM.RI(I)-K1.Cd-109

MEASURAND      Activity concentration of Cd-109

 

The key comparison reference value xR for this radionuclide is estimated to be

 

xR = 8138 kBq with a standard uncertainty uR = 26 kBq

 

(see Section 4 of the BIPM.RI(I)-K1.Cd-109 Final Report).

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence are both expressed in MBq, where xi is the equivalent activity for laboratory i.

The Degrees of equivalence are also given in relative terms by Di = (xI - xR) /xand its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.

Comparison
Comparison close
Results

BIPM.RI(I)-K1.Cd-109

MEASURAND      Activity concentration of Cd-109

 

xi   result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi

ui   combined standard uncertainty of xi