Gamma Rays

**Definition:** 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.

**Tree numbers:** - G01.358.500.505.300 - G01.750.250.300 - G01.750.750.400

**Synonyms:** - Gamma Radiation - Radiation, Gamma