Radiation

• High energy particles or rays emitted during the nuclear decay processes.
• (ionizing radiation) Alpha particles, beta particles, gamma rays, x-rays, neutrons, high-speed electrons, high-speed protons, and other particles capable of producing ions. Radiation does not include non-ionizing radiation, such as radio- or microwaves, or visible, infrared, or ultraviolet light. Source: U.S. Nuclear Regulatory Commission