Air-kerma rate constant

A characteristic constant for a radionuclide, which is defined in terms of an ideal point source, as , where is the air-kerma rate due to photons (gamma and x rays) of energy greater than δ at a distance l in a vacuum from a point source of the radionuclide of activity A.

(Adapted from ICRP Publication 107)

ICRP Glossary entry - 22 February 2019

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ICRP Publication 107 Glossary (Ann. ICRP 38(3), 2008)

This constant, a characteristic of a radionuclide, is defined in terms of an ideal point source as where is the air-kerma rate due to photons (gamma and x rays) of energy greater than δ at a distance l in a vacuum from a point source of the radionuclide of activity A.