Radiation exposure is a measure of the ionization of air due to ionizing radiation from photons, that is, gamma rays and X-rays. It is the electric charge freed by the radiation divided by the mass of the air. As a measure of radiation damage it is less useful than the analogous concept of absorbed dose. The SI unit of exposure is the coulomb per kilogram (C/kg), however the roentgen (R) is commonly used internationally in the nuclear industry. This Radiation (Exposure) converter allows you to convert coulomb/kilogram (C/kg), microcoulomb/kilogram (µC/kg), microroentgen (µR), miliroentgen (mR), millicoulomb/kilogram (mC/kg), parker, rep, roentgen (R), tissue roentgen, among other units related to Radiation (Exposure).