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absorbed dose



The quantity of radiation received per unit mass within a given period of time. The SI unit of absorbed dose is the gray (Gy). One gray is the absorbed dose when the energy per unit mass imparted to matter is 1 joule per kilogram. A former unit, the rad, = 0.01 gray.

The absorbed dose rate is the absorbed dose per unit of time. Its unit is the Gy/h.

See also equivalent dose.


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   • ATOMIC AND NUCLEAR PHYSICS
   • HEALTH AND DISEASE
   • SPACE AND AEROSPACE MEDICINE


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