BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND : Absorbed dose to water
Radiation quality 100 kV

 

Degrees of equivalence, Di  and its expanded uncertainty Ui (k = 2), both expressed in mGy/Gy.

100 kV
Di
Participating institutes

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND  Absorbed dose to water
Radiation quality 135 kV

 

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2), expressed in mGy/Gy

135 kV
Di
Participating institutes

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 180 kV

 

Degrees of equivalence, Di and its expanded uncertainty Ui (k = 2), both expressed in mGy/Gy.

180 kV
Di
Participating institutes

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 250 kV

 

Degrees of equivalence, Di and its expanded uncertainty Ui  (k = 2), both expressed in mGy/Gy.

250 kV
Di
Participating institutes

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND : Absorbed dose to water
Radiation quality 100 kV

 

Degrees of equivalence, Di  and its expanded uncertainty Ui (k = 2), both expressed in mGy/Gy.

LABi Di Uneg,i Upos,i
mGy/Gy
mGy/Gy
mGy/Gy
PTB -6.7 21.4
LNE-LNHB -22.1 23.8
VSL -5.4 20.7
Participating institutes
BIPM.RI(I)-K9 100 kV
EURAMET.RI(I)-K9 100 kV

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND : Absorbed dose to water
Radiation quality 135 kV

 

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2), expressed in mGy/Gy

LABi Di Uneg,i Upos,i
mGy/Gy
mGy/Gy
mGy/Gy
PTB -11.1 20.2
LNE-LNHB -1.1 18
VSL 9.9 19.6
Participating institutes
BIPM.RI(I)-K9 135 kV
EURAMET.RI(I)-K9 135 kV

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 180 kV

 

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2), expressed in mGy/Gy

LABi Di Uneg,i Upos,i
mGy/Gy
mGy/Gy
mGy/Gy
PTB -9.4 17.8
LNE-LNHB -15.5 21
ENEA-INMRI -7.7 40
VSL -1.4 19
Participating institutes
BIPM.RI(I)-K9 180 kV
EURAMET.RI(I)-K9 180 kV

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 250 kV

 

Degrees of equivalence, Di and its expanded uncertainty Ui (k = 2), both expressed in mGy/Gy.

LABi Di Uneg,i Upos,i
mGy/Gy
mGy/Gy
mGy/Gy
PTB -5.3 17.8
LNE-LNHB 7.4 18
ENEA-INMRI 8.5 40
VSL 1.9 19.5
Participating institutes
BIPM.RI(I)-K9 250 kV
EURAMET.RI(I)-K9 250 kV
Comparison
Comparison close
BIPM comparison
Linked comparison
EURAMET.RI(I)-K9
Metrology area, Sub-field Ionizing Radiation, Section I (x and gamma rays, electrons)
Description Measurement of absorbed dose to water for medium energy X-rays
Time of measurements 2014 - 2015
Status Approved for equivalence
Final Reports of the comparisons
References

EURAMET.RI(I)-S13 Technical Protocol

Measurand Absorbed dose to water in 2 g/cm2
Parameters CCRI x-radiation qualities 100 kV, 135 kV, 180 kV and 250 kV
Transfer device Transfer ionization chambers type PTW TM30013 S/N 7463, 7484 and 7485
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 Project No 1331
Comments

This comparison replaced EURAMET.RI(I)-S13 on 17 April 2018

First results published on 17 April 2018
EURAMET.RI(I)-K9 results are linked to those of BIPM.RI(I)-K9

Pilot institute PTB
Physikalisch-Technische Bundesanstalt
Germany
Contact person Ludwig BUERMANN

+49 (0) 531 592 6620
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

ENEA-INMRI

Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET

LNE-LNHB

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

VSL

VSL, Netherlands, EURAMET

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND : Absorbed dose to water
Radiation quality 100 kV

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

The degree of equivalence of laboratory i with respect to xR,i is given by a pair of terms: Di and Ui = 2 ui, its expanded uncertainty (k = 2), both expressed in mGy/Gy.
In evaluating ui for BIPM comparisons, account is taken of correlation between uLab i and uR,i (see the relevant Final Report). For regional comparisons, additional linking uncertainties are included.

 

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 ui and uj. For regional comparisons involving secondary standards, this includes correlation related to traceability.

 

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 135 kV

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

The degree of equivalence of laboratory i with respect to xR,i is given by a pair of terms: Di and Ui = 2 ui, its expanded uncertainty (k = 2), both expressed in mGy/Gy.
In evaluating ui for BIPM comparisons, account is taken of correlation between uLab i and uR,i  (see the relevant Final Report). For regional comparisons, additional linking uncertainties are included.

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 ui and uj. For regional comparisons involving secondary standards, this includes correlation related to traceability.

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 180 kV

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

The degree of equivalence of laboratory i with respect to xR,i is given by a pair of terms: Di and Ui = 2 ui, its expanded uncertainty (k = 2), both expressed in mGy/Gy.
In evaluating ui for BIPM comparisons, account is taken of correlation between uLab i and uR,i (see the relevant Final Report). For regional comparisons, additional linking uncertainties are included.

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 ui and uj. For regional comparisons involving secondary standards, this includes correlation related to traceability.

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 250 kV

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

The degree of equivalence of laboratory i with respect to xR,i is given by a pair of terms: Di and Ui = 2 ui, its expanded uncertainty (k = 2), both expressed in mGy/Gy.
In evaluating ui for BIPM comparisons, account is taken of correlation between uLab i and uR,i (see the relevant Final Report). For regional comparisons, additional linking uncertainties are included.

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 ui and uj. For regional comparisons involving secondary standards, this includes correlation related to traceability.

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND : Absorbed dose to water
Radiation quality 100 kV

 

BIPM.RI(I)-K9

uLabi  relative standard uncertainty of absorbed dose to water determined by Lab i

xi   absorbed dose to water 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

EURAMET.RI(I)-K9

uLab i : relative standard uncertainty of calibration coefficients determined by Lab i


xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard, derived from the calibration coefficients through the results of the linking laboratory (PTB) as detailed in the EURAMET.RI(I)-K9 Final Report.


ui : combined standard uncertainty of xi taking correlation into account

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND : Absorbed dose to water
Radiation quality 135 kV

 

BIPM.RI(I)-K9

uLab i : relative standard uncertainty of absorbed dose to water determined by Lab i
 

xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard
 

ui : combined standard uncertainty of xi taking correlation into account

 

EURAMET.RI(I)-K9

uLab i : relative standard uncertainty of calibration coefficients determined by Lab i
 

xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard, derived from the calibration coefficients through the results of the linking laboratory (PTB) as detailed in the EURAMET.RI(I)-K9 Final Report.
 

ui : combined standard uncertainty of xi taking correlation into account

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND   Absorbed dose to water
Radiation quality 180 kV

 

BIPM.RI(I)-K9

uLab i : relative standard uncertainty of absorbed dose to water determined by Lab i


xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard


ui : combined standard uncertainty of xi taking correlation into account

EURAMET.RI(I)-K9

uLab i : relative standard uncertainty of calibration coefficients determined by Lab i


xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard, derived from the calibration coefficients through the results of the linking laboratory (PTB) as detailed in the EURAMET.RI(I)-K9 Final Report.


ui : combined standard uncertainty of xi taking correlation into account

BIPM.RI(I)-K9 and EURAMET.RI(I)-K9

MEASURAND  Absorbed dose to water
Radiation quality 250 kV

 

BIPM.RI(I)-K9

uLab i : relative standard uncertainty of absorbed dose to water determined by Lab i


xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard


ui : combined standard uncertainty of xi taking correlation into account

EURAMET.RI(I)-K9

uLab i : relative standard uncertainty of calibration coefficients determined by Lab i


xi : absorbed dose to water determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard, derived from the calibration coefficients through the results of the linking laboratory (PTB) as detailed in the EURAMET.RI(I)-K9 Final Report.


ui : combined standard uncertainty of xi taking correlation into account