Page 237 - Radiation Safety

3. Absorbed Dose (D)

Total energy transferred or absorbed by a material per

unit mass when irradiated by ionizing radiation

Old unit : Rad

S.I. unit – Gray (Gy)

1 Gy = 1 Joule/kg

1 rad = 0.01 J/kg

1 Gy = 100 rad*

1 R = 0.869 rad in air

*rad = radiation absorbed dose

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