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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a² + b²]^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

CMC ID : EURAMET-RI-CH-00000GSC-1

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

CMC ID : EURAMET-RI-CH-00000GSL-1

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

CMC ID : EURAMET-RI-CH-00000GSQ-1

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

CMC ID : EURAMET-RI-CH-00000GSD-1

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

CMC ID : EURAMET-RI-CH-00000GSP-1

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

CMC ID : EURAMET-RI-CH-00000GST-1

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

CMC ID : EURAMET-RI-CH-00000GSF-1

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

CMC ID : EURAMET-RI-CH-00000GSN-1

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

CMC ID : EURAMET-RI-CH-00000GSU-1

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

CMC ID : EURAMET-RI-CH-00000GSG-1

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

CMC ID : EURAMET-RI-CH-00000GSA-1

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

CMC ID : EURAMET-RI-CH-00000GSO-1

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

CMC ID : EURAMET-RI-CH-00000GSB-1

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

CMC ID : EURAMET-RI-CH-00000GSX-1

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

CMC ID : EURAMET-RI-CH-00000GSW-1

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

CMC ID : EURAMET-RI-CH-00000GSH-1

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

CMC ID : EURAMET-RI-CH-00000GSV-1

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

CMC ID : EURAMET-RI-CH-00000GSE-1

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

CMC ID : EURAMET-RI-CH-00000GSR-1

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

CMC ID : EURAMET-RI-CH-00000GSM-1

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