| quotient of dEtr by dm where dEtr is the sum of the initial kinetic energies of all charged ionizing particles liberated by uncharged ionizing particles in a mass dm of material |
K = dEtr/dm
Note 1 to entry: The unit for kerma is gray (1 Gy = 1 J kg−1).
Note 2 to entry: Kerma is derived from “kinetic energy released per unit mass”.
Note 3 to entry: In the case where the material is air the name is air kerma.
Note 4 to entry: This entry was numbered 393-14-65 in IEC 60050-393:2003.