Comparison
Comparison close

BIPM.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.3

 

MEASURAND                 Air kerma

Radiation quality        Co-60 beam

 

Degrees of equivalence represented by Di = (xI - 1) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

Air kerma
Di  (mGy/Gy)
Participating institutes

Only the most recent degree of equivalence is retained for those laboratories which participated in two key comparisons.

Results generated from SIM.RI(I)-K1,  APMP.RI(I)-K1, COOMET.RI(I)-K1 and  EUROMET.RI(I)-K1 are no longer listed here as they are older than 15 years. Nevertheless, these results can be consulted via the left margin of the "Information" tab.

Comparison
Comparison close

BIPM.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.3

 

MEASURAND                 Air kerma

Radiation quality        Co-60 beam

 

Degrees of equivalence represented by Di = (xI - 1) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

LABi Di Uneg,i Upos,i
mGy/Gy
mGy/Gy
mGy/Gy
VNIIM 0.8 3.6
NIST 3.9 6.8
ININ 3.5 4.2
LNE-LNHB -0.6 3.6
PTB 3.6 3.4
ENEA-INMRI -0.1 4.4
NIM -0.3 5.4
IST-LPSR 2.6 3.4
SCK·CEN 2.1 5.2
SMU 4.2 5.4
NPL -0.4 6.0
VSL -3.7 4.2
BEV 3.0 5.0
GUM 3.9 6.0
ARPANSA -1.4 5.5
NRC 2.2 4.4
BFKH 2.9 4.4
NMIJ 1.3 4.4
KRISS 0.6 3.6
INER 0.5 6.9
DMSC -4.5 7.8
NIS -12.1 14.6
METAS 0.1 10.5
CIEMAT 0.6 7.6
VINS 2.4 10.2
SSM 0.0 5.7
DSA -0.1 6.2
STUK 0.5 6.0
DTU 0.6 6.9
CIEMAT 0.8 7.3
IAEA -0.1 7.1
Participating institutes
BIPM.RI(I)-K1
APMP.RI(I)-K1.1
EURAMET.RI(I)-K1.1
EURAMET.RI(I)-K1.2
EURAMET.RI(I)-K1.3

Only the most recent degree of equivalence is retained for those laboratories which participated in two key comparisons.

Results generated from SIM.RI(I)-K1,  APMP.RI(I)-K1, COOMET.RI(I)-K1 and  EUROMET.RI(I)-K1 are no longer listed here as they are older than 15 years. Nevertheless, these results can be consulted via the left margin of the "Information" tab.

EURAMET.RI(I)-K1.2
Metrology area, Sub-field Ionizing Radiation, Section I (x and gamma rays, electrons)
Description Measurement of air kerma for Cobalt 60
Time of measurements 2016
Status Approved for equivalence
Final Reports of the comparisons
References

EURAMET.RI(I)-K1.2 Registration and progress form

EURAMET.R(I)-K1.2 -K4.2 and -K5.1 Technical Protocol

Measurand Measurement of air kerma for Cobalt 60
Transfer device Electrometer with 2 Ionization Chambers
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 1389
Pilot institute BEV
Bundesamt für Eich- und Vermessungswesen
Austria
Contact person A. Steurer

+43 (0)1 21110-6379 or 6806
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

VINS

Vinca Institute of Nuclear Sciences, Serbia, EURAMET

Comparison
Comparison close

BIPM.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.3

 

MEASURAND                 Air kerma

Radiation quality        Co-60 beam

 

The key comparison reference value is the BIPM evaluation of air kerma.

 

BIPM.RI(I)-K1

The degree of equivalence of each laboratory i with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy:
the relative difference Di  = (xi -1) x 1000 and Ui, its expanded uncertainty (k = 2), with Ui = 2ui.

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms both expressed in mGy/Gy:

Dij = Di - Dj  and Uij  , its expanded uncertainty (k = 2). The approximation for Uij is explained in section 5 of the Final Reports (available from the "Participant" tab).

 

Linking APMP.RI(I)-K1.1 to BIPM.RI(I)-K1

The relative value xi is the comparison result for laboratory i participant in APMP.RI(I)-K1.1 and is linked to the BIPM.RI(I)-K1 via ARPANSA and NMIJ-AIST (see APMP.RI(I)-K1.1 Final Report).

The degree of equivalence of each laboratory i participant in APMP.RI(I)-K1.1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2) (see Section 5 of the APMP.RI(I)-K1 Final Report).

The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:

Dij = Di - Dj and Uij, its expanded uncertainty (k = 2). The approximation for Uij is given in APMP.RI(I)-K1.1 Final Report.

 

Linking EURAMET.RI(I)-K1.1 to BIPM.RI(I)-K1

The relative value xi is the comparison result for laboratory i participant in EURAMET.RI(I)-K1.1 and is linked to the BIPM.RI(I)-K1 via BEV, LNE-LNHB and VSL (see EURAMET.RI(I)-K1.1 Final Report).

The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K1.1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2) (See section 4.4 of the EURAMET.RI(I)-K1.1 Final Report).

 

Linking EURAMET.RI(I)-K1.2 to BIPM.RI(I)-K1

The relative value xi is the comparison result for laboratory i participant in EURAMET.RI(I)-K1.2 and is linked to the BIPM.RI(I)-K1 via BEV (see EURAMET.RI(I)-K1.2 Final Report).

The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K1.2 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di = (xi - 1) x 1000 and Ui, its expanded uncertainty (k = 2) (See section 6 of the EURAMET.RI(I)-K1.2 Final Report).

 

Linking EURAMET.RI(I)-K1.3 to BIPM.RI(I)-K1

VSL provides the link between the key comparison BIPM.RI(I)-K1 and EURAMET.RI(I)-K1.3, having participated in both comparisons. The linking process is described in Section 2.6 of the EURAMET.RI(I)-K1.3 Final Report.

The degree of equivalence of each laboratory i participant in EURAMET.RI(I)-K1.3 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: Di  and Ui, its expanded uncertainty (k = 2) (See section 3.3 of the EURAMET.RI(I)-K1.3 Final Report).

Comparison
Comparison close

BIPM.RI(I)-K1, SIM.RI(I)-K1, APMP.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.3

 

MEASURAND                 Air kerma

Radiation quality        Co-60 beam

 

BIPM.RI(I)-K1 - Laboratory measurements

xi : air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard

ui : combined standard uncertainty of xi

  Labi xi ui year of measurement
   VNIIM 1.0008 0.0018 2009
   NIST 1.0039 0.0034 2011
   ININ 1.0035 0.0021 2012
   LNE-LNHB 0.9994 0.0018 2013
   PTB 1.0036 0.0017 2014
   ENEA-INMRI 0.9999 0.0022 2015
   NIM 0.9997 0.0027 2015
   IST/ITN 1.0026 0.0017 2015
   SCK-CEN 1.0021 0.0026 2016
   SMU 1.0042 0.0027 2017
   NPL 0.9996 0.0030 2017
   VSL 0.9963 0.0021 2017
   BEV 1.0030 0.0025 2020
   GUM 1.0039 0.0030 2020
   ARPANSA 0.9986 0.0027 2020
   NRC 1.0022 0.0022 2020
  BFKH 1.0029 0.0022 2021
  NMIJ 1.0013 0.0022 2022
  KRISS 1.0006 0.0018 2022

 

SIM.RI(I)-K1 - Laboratory measurements

See SIM.RI(I)-K1 Final Report.

 

APMP.RI(I)-K1 - Laboratory measurements

See  APMP.RI(I)-K1 Final Report.

 

COOMET.RI(I)-K1 - Laboratory measurements

See COOMET.RI(I)-K1 Final Report.

 

EUROMET.RI(I)-K1 - Laboratory measurements

See EUROMET.RI(I)-K1 Final Report.

 

APMP.RI(I)-K1.1 - Laboratory measurements

xi : air kerma detrmined by Lab , relative to the reference value determined by the BIPM standard through ARPANSA and NMIJ AIST measurements at the BIPM

ui : combined standard uncertainty of xi

  Labi xi ui year of measurement
  INER 1.0005 0.0034 2009
  DMSC 0.9955 0.0044 2010
  NIS 0.9879 0.0075 2010

 

EURAMET.RI(I)-K1.1 - Laboratory measurements

See Section 4 of the EURAMET.RI(I)-K1.1 Final Report.

 

EURAMET.RI(I)-K1.2 - Laboratory measurements

xi : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through BEV measurements at the BIPM

ui : combined standard uncertainty of xi

  Labi xi ui year of measurement
  VINS 1.0024 0.0051 2017

 

EURAMET.RI(I)-K1.3 - Laboratory measurements

The measurement results are listed in Table 4 of the EURAMET.RI(I)-K1.3 Final Report.