Gamma Ray

A type of high-energy radiation that is different from an x-ray.

A highly penetrating type of nuclear radiation, similar to x-radiation, except that it comes from within the nucleus of an atom, and, in general, has a shorter wavelength.

A type of electromagnetic radiation with a very short wavelength and high energy level. Generally, emitted during radioactive decay of a substance.

Electromagnetic radiation resulting from nuclear transitions. Although incorrect, high-energy radiation, particularly bremsstrahlung , is sometimes referred to as gamma radiation.