BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
Degrees of equivalence represented by D_{i} = (x_{I} - x_{R})/x_{R} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in mGy/Gy.
BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
Degrees of equivalence represented by D_{i} = (x_{I} - x_{R})/x_{R} and its expanded uncertainty U_{i} at a 95 % level of confidence, both expressed in mGy/Gy.
LAB_{i} | D_{i} | U_{neg,i} | U_{pos,i} | |
---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
VNIIM | 0.8 | 3.6 | ||
KRISS | -0.5 | 3.2 | ||
NIST | 3.9 | 6.8 | ||
NMIJ | 1.2 | 4.4 | ||
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 | ||
MKEH | 4.7 | 3.8 | ||
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 | ||
BELGIM | 12.5 | 21.8 | ||
CPHR | 1.1 | 9.6 | ||
RMTC | -3.6 | 9.6 | ||
CMI | -5.8 | 14.1 | ||
SSM | 1.0 | 7.5 | ||
STUK | -2.3 | 7.3 | ||
NRPA | 5.1 | 7.1 | ||
IAEA | 0.0 | 7.5 | ||
HIRCL | 4.2 | 11.9 | ||
BIM | -4.5 | 13.0 | ||
LNMRI | 2.4 | 13.7 | ||
CNEA | 1.8 | 10.0 | ||
BARC | 0.7 | 7.6 | ||
Nuclear Malaysia | -0.1 | 7.4 | ||
NMISA | 0.9 | 6.9 | ||
INER | 0.5 | 6.9 | ||
DMSC | -4.5 | 7.8 | ||
NIS | -12.1 | 14.6 | ||
VINS | 2.4 | 10.2 | ||
METAS | 0.1 | 10.5 | ||
CIEMAT | 0.7 | 7.6 |
Metrology area, Sub-field | Ionizing Radiation, Section I (x and gamma rays, electrons) |
Description | Air kerma |
Time of measurements | 2019 - 2021 |
Status | Measurements in progress |
References | |
Measurand | Air kerma |
Parameters | Co-60 beam |
Transfer device | Ionization chambers: waterproof Farmer-type |
Comparison type | Key Comparison |
Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
Conducted by | SIM (Inter-American Metrology System) |
RMO Internal Identifier | SIM.RI(I).K1-K4 |
Comments | |
Pilot institute |
NRC
National Research Council Canada |
Contact person | John Paul Archambault +1-613-993-2715x252 |
Pilot laboratory | |
---|---|
NRC |
National Research Council, Canada, SIM |
CNEA |
National Commission of Atomic Energy, Argentina, SIM |
ININ |
Instituto Nacional de Investigaciones Nucleares, Mexico, SIM |
LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
MIEM-LSMRI |
Laboratorios Tecnogestión - Ministerio de Industria, Energía y Minería, Uruguay, SIM |
NIST |
National Institute of Standards and Technology, United States, SIM |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
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BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
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 D_{i} and U_{i}, its expanded uncertainty (k = 2), with U_{i}_{ }= 2u_{i}.
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:
D_{ij }= D_{i} - D_{j}_{ }and U_{ij} , its expanded uncertainty (k = 2). The approximation for U_{ij} is explained in section 5 of the Final Report.
Linking COOMET.RI(I)-K1 to BIPM.RI(I)-K1
The relative value x_{i}_{ }is the comparison result for laboratory i participant in COOMET.RI(I)-K1 and is linked to the BIPM.RI(I)-K1 via PTB and SMU (see COOMET.RI(I)-K1 Final Report).
The degree of equivalence of each laboratory i participant in COOMET.RI(I)-K1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: D_{i} = (x_{i} - 1) x 1000 and U_{i}, its expanded uncertainty (k = 2).
See COOMET.RI(I)-K1 Final Report for the approximation used for U_{i} in the table of degrees of equivalence.
The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:
D_{ij} = D_{i} - D_{j} and U_{ij}, its expanded uncertainty (k = 2). The approximation for U_{ij} is given in COOMET.RI(I)-K1 Final Report.
Linking EUROMET.RI(I)-K1 to BIPM.RI(I)-K1
The relative value x_{i}_{ }is the comparison result for laboratory i participant in EUROMET.RI(I)-K1 and is linked to the BIPM.RI(I)-K1 via the seven linking laboratories ARPANSA, BEV, ENEA-INMRI, LNE-LNHB, MKEH, NRC and VSL (see EUROMET.RI(I)-K1 Final Report).
The degree of equivalence of each laboratory i participant in EUROMET.RI(I)-K1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: D_{i} = (x_{i} - 1) x 1000 and U_{i}, its expanded uncertainty (k = 2).
See EUROMET.RI(I)-K1 Final Report for the approximation used for U_{i} in the table of degrees of equivalence.
The degree of equivalence between two laboratories i and j is given by a pair of terms both expressed in mGy/Gy:
D_{ij} = D_{i} - D_{j} and U_{ij}, its expanded uncertainty (k = 2). The approximation for U_{ij} is given in EUROMET.RI(I)-K1 Final Report.
Linking APMP.RI(I)-K1 to BIPM.RI(I)-K1
The relative value x_{i}_{ }is the comparison result for laboratory i participant in APMP.RI(I)-K1 and is linked to the BIPM.RI(I)-K1 via ARPANSA and NMIJ-AIST (see APMP.RI(I)-K1 Final Report).
The degree of equivalence of each laboratory i participant in APMP.RI(I)-K1 with respect to the key comparison reference value is given by a pair of terms both expressed in mGy/Gy: D_{i} = (x_{i} - 1) x 1000 and U_{i}, 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:
D_{ij} = D_{i} - D_{j} and U_{ij}, its expanded uncertainty (k = 2). The approximation for U_{ij} is given in APMP.RI(I)-K1 Final Report.
Linking APMP.RI(I)-K1.1 to BIPM.RI(I)-K1
The relative value x_{i}_{ }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: D_{i} = (x_{i} - 1) x 1000 and U_{i}, 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:
D_{ij} = D_{i} - D_{j} and U_{ij}, its expanded uncertainty (k = 2). The approximation for U_{ij} is given in APMP.RI(I)-K1.1 Final Report.
Linking EURAMET.RI(I)-K1.2 to BIPM.RI(I)-K1
The relative value x_{i}_{ }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: D_{i} = (x_{i} - 1) x 1000 and U_{i}, its expanded uncertainty (k = 2).
Linking EURAMET.RI(I)-K1.1 to BIPM.RI(I)-K1
The relative value x_{i}_{ }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: D_{i} = (x_{i} - 1) x 1000 and U_{i}, its expanded uncertainty (k = 2).
Following decision of the CCRI in 2011, the pair-wise degrees of equivalence are not explicitely published in the KCDB.
In general, only the most recent degree of equivalence is retained for those laboratories which participated in two key comparisons.
Degrees of equivalence obtained in SIM.RI(I)-K1 are superseeded by more recent results.
BIPM.RI(I)-K1, COOMET.RI(I)-K1, EUROMET.RI(I)-K1, APMP.RI(I)-K1, APMP.RI(I)-K1.1, EURAMET.RI(I)-K1.2 and EURAMET.RI(I)-K1.1
MEASURAND Air kerma
Radiation quality Co-60 beam
BIPM.RI(I)-K1 - Laboratory measurements
x_{i} : air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard
u_{i} : combined standard uncertainty of x_{i}
_{}
COOMET.RI(I)-K1 - Laboratory measurements
x_{i} : air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard through the PTB and SMU measurements at the BIPM (see COOMET.RI(I)-K1 Final Report)
u_{i} : combined standard uncertainty of x_{i}
_{}
EUROMET.RI(I)-K1 - Laboratory measurements
MEASURAND : Air kerma
x_{i} : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through the ARPANSA, BEV, ENEA-INMRI, LNE-LNHB, MKEH, NRC and VSL measurements at the BIPM.
u_{i} : combined standard uncertainty of x_{i}
_{}
APMP.RI(I)-K1 - Laboratory measurements
x_{i} : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through ARPANSA and NMIJ AIST measurements at the BIPM
u_{i} : combined standard uncertainty of x_{i}
_{}
APMP.RI(I)-K1 measurements were carried out between August 2004 and May 2006
APMP.RI(I)-K1.1 - Laboratory measurements
x_{i} : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through ARPANSA and NMIJ AIST measurements at the BIPM
u_{i} : combined standard uncertainty of x_{i}
_{}
EURAMET.RI(I)-K1.2 - Laboratory measurements
x_{i} : air kerma detrmined by Lab i , relative to the reference value determined by the BIPM standard through BEV measurements at the BIPM
u_{i} : combined standard uncertainty of x_{i}
EURAMET.RI(I)-K1.1 - Laboratory measurements
See Section 4 of the EURAMET.RI(I)-K1.1 Final Report.