“rad”的意思、由来-百科全书

rad

the unit of absorbed dose of ionizing radiation, defined in 1962 by the International Commission on Radiological Units and Measurements as equal to the amount of radiation that releases an energy of 100 ergs per gram of matter. One rad is equal approximately to the absorbed dose delivered when soft tissue is exposed to one roentgen of medium-voltage radiation. “Rad” is derived from “radiation absorbed dose.” In 1975 it was replaced by the gray (Gy), equal to 100 rads, in the International System of Units (SI). The rad is used now only in the United States.

词条	rad
释义	rad the unit of absorbed dose of ionizing radiation, defined in 1962 by the International Commission on Radiological Units and Measurements as equal to the amount of radiation that releases an energy of 100 ergs per gram of matter. One rad is equal approximately to the absorbed dose delivered when soft tissue is exposed to one roentgen of medium-voltage radiation. “Rad” is derived from “radiation absorbed dose.” In 1975 it was replaced by the gray (Gy), equal to 100 rads, in the International System of Units (SI). The rad is used now only in the United States.
随便看	explosive exponential function Export-Import Bank of Japan Export-Import Bank of the United States ex post facto law exposure meter Expressionism expressway exsolution extended family extensive agriculture extensor muscle extenuating circumstance extermination camp Exterminator external auditory canal External dose due to natural radioactivity in soil or rock extinction extinguisher moss extortion extracellular fluid extradition extrametrical extrasensory perception extrasolar planet