Roentgen
R
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Definition:
The international unit of quantity or dose for X-rays or gamma rays, equal to the quantity of X- or gamma rays which will produce as a result of ionization one electrostatic unit of electricity of either sign in 1 cc of dry air at 0°C and standard atmospheric pressure. In SI, the roentgen is expressed as 2.58 E-04 coulombs per kilogram. See also RAD.
Definition Copyright ©1989 CRC Press LLC. All rights
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