BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         100 kV

 

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

Air kerma at 100 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         135 kV

 

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

Air kerma at 135 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         180 kV

 

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

Air kerma at 180 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         250 kV

 

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

Air kerma at 250 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         100 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR 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
MKEH -0.4 7.0
PTB 2.7 5.2
ENEA 3.9 6.2
BEV 3.2 6.4
NRC 3.1 6.6
NMIJ -0.8 6.2
VSL -1.0 6.4
NIST -2.2 7.8
NIM 7.2 6.2
NPL 0.4 6.8
LNE-LNHB 0.5 7.6
VNIIM 0.5 3.8
GUM 6.9 6.0
ARPANSA 3.8 8.2
INER 3.7 4.6
Nuc. Malaysia 14.2 12.0
DMSc -3.1 11.8
BARC 8.5 13.8
NMISA 4.5 5.6
KRISS -8.4 5.2
IAEA 4.3 7.4
CNEA -6.0 14.3
LMNRI/IRD -9.5 12.1
ININ -9.3 16.1
Participating institutes
BIPM.RI(I)-K3
APMP.RI(I)-K3
SIM.RI(I)-K3

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         135 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR 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
MKEH 0.9 7.0
PTB 4.5 5.2
ENEA 4.2 6.2
BEV 4.7 6.4
NRC 2.3 6.6
NMIJ -1.4 6.2
VSL -0.4 6.4
NIST -3.3 7.8
NIM 5.4 6.2
NPL 0.0 6.8
LNE-LNHB -0.5 7.6
VNIIM 1.0 3.8
GUM 3.2 6.0
ARPANSA 5.2 8.2
INER 4.3 4.6
Nuc. Malaysia 16.2 12.0
DMSc 4.2 11.8
NMISA 2.0 5.6
KRISS 1.1 5.2
IAEA 9.2 7.4
CNEA 1.1 14.3
LMNRI/IRD -9.4 12.1
ININ -12.1 16.1
Participating institutes
BIPM.RI(I)-K3
APMP.RI(I)-K3
SIM.RI(I)-K3

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         180 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR 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
MKEH 0.4 7.0
PTB 4.9 5.2
ENEA 7.3 6.2
BEV 4.1 6.4
NRC 1.3 6.6
NMIJ -2.4 6.2
VSL 0.0 6.4
NIST -2.7 7.8
NIM 6.1 6.2
NPL -2.5 6.8
LNE-LNHB -1.0 7.6
VNIIM 1.7 3.8
GUM 3.6 6.0
ARPANSA 5.4 8.2
INER 6.0 4.6
Nuc. Malaysia 15.0 12.0
DMSc 9.6 11.8
NMISA 4.8 5.6
KRISS 6.6 5.2
IAEA 13.1 7.4
CNEA 2.1 14.3
LMNRI/IRD -8.0 12.1
ININ -11.1 16.1
Participating institutes
BIPM.RI(I)-K3
APMP.RI(I)-K3
SIM.RI(I)-K3

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         250 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR 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
MKEH 0.4 7.0
PTB 5.5 5.2
ENEA 5.6 6.2
BEV 1.1 6.4
NRC 0.4 6.6
NMIJ -3.7 6.2
VSL -2.1 6.4
NIST -5.8 7.8
NIM 6.0 6.2
NPL -4.4 6.8
LNE-LNHB -2.8 7.6
VNIIM 2.2 3.8
GUM 2.7 6.0
ARPANSA 4.5 8.2
INER 5.5 4.6
Nuc. Malaysia 15.9 12.0
DMSc 13.0 11.8
BARC 14.8 13.8
NMISA 7.5 5.6
KRISS 7.6 5.2
IAEA 14.0 7.4
CNEA 1.4 14.3
LMNRI/IRD -8.5 12.1
ININ -12.00 16.1
Participating institutes
BIPM.RI(I)-K3
APMP.RI(I)-K3
SIM.RI(I)-K3
Comparison
Comparison close
BIPM comparison
Linked comparison
BIPM.RI(I)-K3
Metrology area, Sub-field Ionizing Radiation, Section I (x and gamma rays, electrons)
Description Measurement of air kerma for medium energy X-rays
Time of measurements 1975 -
Status Continuous, approved for equivalence
References

Technical Protocol for ongoing BIPM Dosimetry comparisons

Measurand Air-kerma rate relative to the BIPM evaluation
Parameters Radiation type: X-rays
Radiation quality: 100 kV to 250 kV
Transfer device Ionization chambers
Comparison type Key Comparison
Consultative Committee CCRI (Consultative Committee for Ionizing Radiation)
Conducted by BIPM (Bureau International des Poids et Mesures)
Comments The Final Report for each bi-lateral comparsion is listed in the tab "Participants"
First results published on 28 November 2003
Update on 18 September 2009 following a re-evaluation of the BIPM international standards for air kerma in x-rays
Most recent update : 30 November 2021
Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person D. T. Burns

+33 (0) 1 45 07 70 80
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

ARPANSA

Australian Radiation Protection and Nuclear Safety Agency, Australia, APMP


BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

BFKH

Government Office of the Capital City Budapest, Hungary, EURAMET

comparison carried out with OMH (Országos Mérésügyi Hivatal)

comparison carried out with OMH (Országos Mérésügyi Hivatal)

ENEA-INMRI

Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET

GUM

Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET

LNE-LNHB

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


NIM

National Institute of Metrology, China, APMP

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

NRC

National Research Council, Canada, SIM

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

VNIIM

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


VSL

VSL, Netherlands, EURAMET

comparison carried out with NMi (Nederlands Meetinstituut - Van Swinden Laboratorium)

comparison carried out with NMi (Nederlands Meetinstituut - Van Swinden Laboratorium)

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         100 kV

 

For a comparison with laboratory , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,.

 

BIPM.RI(I)-K3

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

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:

Dij = Di - Dj  and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the APMP.RI(I)-K3 Final Report, and SIM.RI(I)-K3 Final Report).

 

Linking APMP.RI(I)-K3 to BIPM.RI(I)-K3

The results of APMP.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via PTB (Germany) and ARPANSA (Australia) who participated in both comparisons.

 

Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3

The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         135 kV

 

For a comparison with laboratory , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,.

 

BIPM.RI(I)-K3

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

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:

Dij = Di - Dj  and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the APMP.RI(I)-K3 Final Report, and SIM.RI(I)-K3 Final Report).

 

Linking APMP.RI(I)-K3 to BIPM.RI(I)-K3

The results of APMP.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via PTB (Germany) and ARPANSA (Australia) who participated in both comparisons.

 

Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3

The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         180 kV

 

For a comparison with laboratory , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,.

 

BIPM.RI(I)-K3

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

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:

Dij = Di - Dj  and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the APMP.RI(I)-K3 Final Report, and SIM.RI(I)-K3 Final Report).

 

Linking APMP.RI(I)-K3 to BIPM.RI(I)-K3

The results of APMP.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via PTB (Germany) and ARPANSA (Australia) who participated in both comparisons.

 

Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3

The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         250 kV

 

For a comparison with laboratory , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,.

 

BIPM.RI(I)-K3

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

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:

Dij = Di - Dj  and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the APMP.RI(I)-K3 Final Report, and SIM.RI(I)-K3 Final Report).

 

Linking APMP.RI(I)-K3 to BIPM.RI(I)-K3

The results of APMP.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via PTB (Germany) and ARPANSA (Australia) who participated in both comparisons.

 

Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3

The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         100 kV

 

uLabi  relative standard uncertainty of air kerma determined by Lab

xi   air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard

ui   combined standard uncertainty of xi taking correlation into account

 

BIPM.RI(I)-K3

 

APMP.RI(I)-K3

 

SIM.RI(I)-K3

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         135 kV

 

uLabi  relative standard uncertainty of air kerma determined by Lab

xi   air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard

ui   combined standard uncertainty of xi taking correlation into account

 

BIPM.RI(I)-K3

 

APMP.RI(I)-K3

 

SIM.RI(I)-K3

 

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         180 kV

 

uLabi  relative standard uncertainty of air kerma determined by Lab

xi   air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard

ui   combined standard uncertainty of xi taking correlation into account

 

BIPM.RI(I)-K3

 

APMP.RI(I)-K3

 

SIM.RI(I)-K3

 

BIPM.RI(I)-K3, APMP.RI(I)-K3 and SIM.RI(I)-K3

 

MEASURAND                 Air kerma

Radiation quality         250 kV

 

uLabi  relative standard uncertainty of air kerma determined by Lab

xi   air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard

ui   combined standard uncertainty of xi taking correlation into account

 

BIPM.RI(I)-K3

 

APMP.RI(I)-K3

 

SIM.RI(I)-K3