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Ionizing radiation
Geographical location
In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Switzerland, IRA (Institut Universitaire de Radiophysique Appliquée)
Ionizing radiation
Activity per unit mass , Single nuclide solution : 4.00E4 Bq/g to 3.00E7 Bq/g
Relative expanded uncertainty 0.4 %
Secondary standard ionization chamber, balance
Cs-137, no further specifications
Reference standard : 4πβγ efficiency tracing, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2016
Ionizing radiation
Activity per unit mass , Single nuclide solution : 2.00E4 Bq/g to 1.50E7 Bq/g
Relative expanded uncertainty 0.8 %
Secondary standard ionization chamber, balance
F-18, no further specifications
Reference standard : 4πγ NaI counting, LS counting (efficiency tracing), standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2001
Ionizing radiation
Activity per unit mass , Single nuclide solution : 4.00E4 Bq/g to 3.00E7 Bq/g
Relative expanded uncertainty 1 %
Secondary standard ionization chamber, balance
Se-75, no further specifications
Reference standard : 4π(PC)γ coincidence counting, 4πγ NaI counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2006
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E5 Bq/g to 7.00E7 Bq/g
Relative expanded uncertainty 0.6 %
Secondary standard ionization chamber, balance
Ce-139, no further specifications
Reference standard : 4π(PC)γ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2017
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E4 Bq/g to 7.00E6 Bq/g
Relative expanded uncertainty 0.3 %
Secondary standard ionization chamber, balance
Co-60, no further specifications
Reference standard : 4πβγ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2005
Ionizing radiation
Activity per unit mass , Single nuclide solution : 4.00E4 Bq/g to 2.50E7 Bq/g
Relative expanded uncertainty 0.5 %
Secondary standard ionization chamber, balance
Yb-169, no further specifications
Reference standard : 4π(PC)γ coincidence counting, 4πγ NaI counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2019
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E5 Bq/g to 7.00E7 Bq/g
Relative expanded uncertainty 1.4 %
Secondary standard ionization chamber, balance
Tc-99m, no further specifications
Reference standard : 4π(PC)γ coincidence counting, 4πγ NaI counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2009
Ionizing radiation
Activity per unit mass , Single nuclide solution : 3.00E4 Bq/g to 2.00E7 Bq/g
Relative expanded uncertainty 0.3 %
Secondary standard ionization chamber, balance
Mn-54, no further specifications
Reference standard : 4π(PC)γ coincidence counting, 4πγ NaI counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2003
Ionizing radiation
Activity per unit mass , Single nuclide solution : 3.00E6 Bq/g to 1.60E8 Bq/g
Relative expanded uncertainty 1.3 %
Secondary standard ionization chamber, balance
Cd-109, no further specifications
Reference standard : 4π(PC)γ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2010
Ionizing radiation
Activity per unit mass , Single nuclide solution : 2.50E4 Bq/g to 1.50E7 Bq/g
Relative expanded uncertainty 0.5 %
Secondary standard ionization chamber, balance
Ir-192, no further specifications
Reference standard : 4π(PC)γ coincidence counting, 4πγ NaI counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2020
Ionizing radiation
Activity per unit mass , Single nuclide solution : 5.00E4 Bq/g to 3.00E7 Bq/g
Relative expanded uncertainty 0.6 %
Secondary standard ionization chamber, balance
Ba-133, no further specifications
Reference standard : 4π(PC)γ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2014
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E5 Bq/g to 6.00E7 Bq/g
Relative expanded uncertainty 0.7 %
Secondary standard ionization chamber, balance
Co-57, no further specifications
Reference standard : 4π(PC) coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2004
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.50E4 Bq/g to 1.00E7 Bq/g
Relative expanded uncertainty 1 %
Secondary standard ionization chamber, balance
Cs-134, no further specifications
Reference standard : 4πβγ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2015
Ionizing radiation
Activity per unit mass , Single nuclide solution : 6.00E4 Bq/g to 4.00E7 Bq/g
Relative expanded uncertainty 1 %
Secondary standard ionization chamber, balance
I-131, no further specifications
Reference standard : 4πβγ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2013
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E7 Bq/g to 8.00E9 Bq/g
Relative expanded uncertainty 1.8 %
Secondary standard ionization chamber, balance
I-125, no further specifications
Reference standard : X-γ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2012
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1000 Bq/g to 1.00E6 Bq/g
Relative expanded uncertainty 5.5 %
LS spectrometer, balance
Tl-204, no further specifications
Reference standard : LS counting (CIEMAT-NIST), standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2021
Ionizing radiation
Activity per unit mass , Single nuclide solution : 2.00E4 Bq/g to 1.30E7 Bq/g
Relative expanded uncertainty 0.6 %
Secondary standard ionization chamber, balance
Eu-152, no further specifications
Reference standard : 4π(PC)γ coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2018
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E5 Bq/g to 7.00E7 Bq/g
Relative expanded uncertainty 1.1 %
Secondary standard ionization chamber, balance
I-123, no further specifications
Reference standard : 4π(PC)γ coincidence counting, 4πγ NaI counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2011
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E4 Bq/g to 7.00E6 Bq/g
Relative expanded uncertainty 0.9 %
Secondary standard ionization chamber, balance
Y-88, no further specifications
Reference standard : 4π(PC) coincidence counting, standard weighting set
Source of traceability : IRA/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2007
Ionizing radiation
Activity per unit mass , Single nuclide solution : 1.00E4 Bq/g to 7.00E6 Bq/g
Relative expanded uncertainty 0.8 %
Secondary standard ionization chamber, balance
Na-22, no further specifications
Reference standard : 4πβγ coincidence counting, standard weighting set
Source of traceability : BIPM/METAS
Approved on 21 October 2001
Institute service identifier : EUR-RAD-IRA-2002

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