Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during NUCLEAR DECAY. The range of wavelengths of emitted radiation is between 0.1 - 100 pm which overlaps the shorter, more energetic hard X-RAYS wavelengths. The distinction between gamma rays and X-rays is based on their radiation source.

Synonyms: Gamma Rays Gamma Radiations Gamma Radiation Nuclear X Rays Wave, Gamma Gamma Ray Ray, Gamma Radiation, Gamma Nuclear X-Ray Waves, Gamma Gamma Waves X-Rays, Nuclear Gamma Wave X-Ray, Nuclear Nuclear X-Rays X Rays, Nuclear