Rem roentgen equivalent for

Rem rem A measure of the energy absorbed in matter as a result of exposure to specific forms of radiation. This unit takes into account the fact that different forms of radiation produce different biological effects. 1 rem is equal to 1 rad times a factor dependent on the type of radiation, rem = roentgen equivalent for man. 

Ans. To measure the relative biological damage induced by radiation, the rad is multiplied by a factor known as the RBE, or relative biological effectiveness. The exact value of the RBE depends uf)on the type of tissue irradiated, the dose rate, and total dose, but it is approximately 1 for x-rays, y-rays, and /3-rays, and 10 for a-rays, protons, and neutrons. The product, rads x RBE = rems roentgen equivalent for man). 

The exact value of the RBE varies with dose rate, total dose, and type of tissue affected. The product of the radiation dose in rads and the RBE of the radiation give the effective dosage in rem (roentgen equivalent for man) ... 

The intensity of radiation depends on the number of disintegrations as well as on the energy and type of radiation emitted. One common unit for the absorbed dose of radiation is the rad (radiation absorbed dose), which is the amount of radiation that results in the absorption of 1 X 10 J per gram of irradiated material. The biological effect of radiation depends on the part of the body irradiated and the type of radiation. For this reason, the rad is often multiplied by a factor called the RBE (relative biological effectiveness). The product is called a rem (roentgen equivalent for man) ... 

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