Gamma Radiation
Gamma radiation is a type of high-energy electromagnetic radiation emitted during disintegration of certain radioactive isotopes such as 125I and 57Co, which are used as tracers in immunoassays. Gamma emitting samples are measured in solid crystal scintillation counters. These solid crystals are usually thallium activated sodium iodide and are different sizes to accommodate lower and higher energy radioisotopes.
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