Absorbed dose

The fundamental dose quantity absorbed dose, $D$, given by:

$D=\frac{d\bar{ϵ}}{dm}$

where $d\bar{ϵ}$ is the mean energy imparted to matter of mass $dm$ by ionising radiation. The SI unit for absorbed dose is joule per kilogram (J kg^-1) and its special name is gray (Gy).

(Adopted from ICRP Publication 103, 2007)

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