For radioactivity (rate of decay):
* Becquerel (Bq): This is the standard unit in the International System of Units (SI). One Becquerel is equal to one disintegration per second.
* Curie (Ci): This is an older unit, but still widely used. One Curie is equal to 3.7 x 10^10 disintegrations per second.
For absorbed dose (amount of energy absorbed by matter):
* Gray (Gy): This is the SI unit for absorbed dose. One Gray is equal to one joule of energy absorbed per kilogram of matter.
* Rad (rad): This is an older unit, still sometimes used. One rad is equal to 0.01 Gray.
For exposure (amount of ionization produced in air):
* Coulomb per kilogram (C/kg): This is the SI unit for exposure.
* Roentgen (R): This is an older unit, still sometimes used. One Roentgen is equal to 2.58 x 10^-4 C/kg.
For equivalent dose (biological effect of radiation):
* Sievert (Sv): This is the SI unit for equivalent dose. It takes into account the type of radiation and its biological effectiveness.
* Rem (rem): This is an older unit, still sometimes used. One rem is equal to 0.01 Sievert.
It's important to note:
* The units used for radiation measurement are not always interchangeable. For example, you can't directly convert a measurement of radioactivity (Becquerel) to a measurement of absorbed dose (Gray).
* The specific units used will depend on the context and the type of radiation being measured.
* Understanding the different units and their relationships is crucial for interpreting radiation measurements and assessing potential risks.
