– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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For those Member State NMIs that do not hold primary standards for x-rays or gamma radiation, the BIPM offers characterizations/calibrations of national secondary standard ionization chambers in terms of the quantities and under the reference conditions determined by the CCRI(I).

These are described in Rapport BIPM-2011/04, together with the uncertainty budgets of the relevant BIPM standards.

X-ray dosimetry
Gamma-radiation dosimetry
International comparisons
Calibration certificates
Related articles
Measuring conditions and uncertainties for the comparison and calibration of national dosimetric standards at the BIPM
BIPM services in the field of ionizing radiation