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Roentgen (R)
A unit of exposure to ionising radiation. It is the amount of gamma or x-rays required to produce ions resulting in a charge of 0. 000258 coulombs/kilogram of air under standard conditions. Named after Wilhelm Roentgen, the German scientist who discovered x-rays in 1895.
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- Part of Speech: noun
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- Industry/Domain: Energy
- Category: Nuclear energy
- Company: U.S. NRC
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