Exposure 25
Exposure 25 :
A quantity used to indicate the amount of ionization in air produced by x- or gamma-ray radiation. The unit is the roentgen (R). For practical purposes, 1 R is comparable to 1 rad or 1 rem for x- and gamma radiation. The SI unit of exposure is the coulomb per kilogram (C/Kg). One R=2.58 X 10^4 C/kg
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