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100 erg/g The rad is a unit of absorbed radiation dose , defined as 1 rad = 0.01 Gy = 0.01 J/kg. [ 1 ] It was originally defined in CGS units in 1953 as the dose causing 100 ergs of energy to be absorbed by one gram of matter.
In 1953 the International Commission on Radiation Units and Measurements (ICRU) recommended the rad, equal to 100 erg/g, as the unit of measure of the new radiation quantity absorbed dose. The rad was expressed in coherent cgs units. [5] In 1975 the unit gray was named as the SI unit of absorbed dose. One gray is equal to 1 J/kg (i.e. 100 rad).
The definition was refined in 1950 as "that dose of any ionizing radiation which produces a relevant biological effect equal to that produced by one roentgen of high-voltage x-radiation." [19] Using data available at the time, the rem was variously evaluated as 83, 93, or 95 erg/gram. [20]
1. The radiation factor W R, ... 100 erg⋅g −1 × W R × W T: 1971 0.010 Sv Although the United States Nuclear Regulatory Commission permits the use of the units ...
[1] It is used as a unit of the radiation quantity absorbed dose that measures the energy deposited by ionizing radiation in a unit ... 100 erg⋅g −1 × W R × W T ...
Radiation protection, also known as radiological protection, is defined by the International Atomic Energy Agency ... 100 erg⋅g −1 × W R × W T: 1971 0.010 Sv
It is the absorbed energetic dose before the biological efficiency of the radiation is factored in. The rep has variously been defined as 83 or 93 ergs per gram of tissue (8.3/9.3 mGy) [2] or per cm 3 of tissue. [3] At the time, this was thought to be the amount of energy deposited by 1 roentgen. [4]
A radiation dosimeter is a device that measures dose uptake of external ionizing ... 100 erg⋅g −1: 1953 0.010 Gy Equivalent dose (H) sievert: Sv J⋅kg −1 × W R: