Exposure (Radiation)

[Rennhack]

Being exposed to ionizing radiation or to radioactive material.

[Rennhack]

A term relating to the amount of ionizing radiation that strikes a living or inanimate material. (This is a general definition. In health physics, exposure is specifically defined as a measure of ionization in air caused by x-ray or gamma radiation only.)

http://www.epa.gov/radiation/understand/pathways.htm