Radiation dose equivalency is measured in which unit?

The appropriate unit for measuring radiation dose equivalency is the Sievert, which is used to express the biological effects of ionizing radiation. It incorporates the different types of radiation and their varying impact on human tissue.

The Rem is another unit that has commonly been used in the United States and is equivalent to one hundredth of a Sievert. Therefore, both Rem and Sievert can be used to express dose equivalency, with Sievert being the SI unit currently favored in scientific contexts.

Grays are used to measure absorbed dose, which is the amount of radiation energy absorbed by a material, irrespective of biological effect. Coulombs measure charge but are not applicable to radiation dose measurements.

In summary, the unit that focuses specifically on the biological impact of radiation exposure, which is crucial for assessing health risks, is the Sievert. However, Rem serves as an older unit still recognized in some contexts.