For those NMIs of countries that are signatories of the Metre Convention 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.
Summary
For those NMIs of countries that are signatories of the Metre Convention 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).
