ionizing radiation

Ionizing radiation is energetic particles or waves that have the potential to ionize an atom or molecule through atomic interactions. It is a function of the energy of the individual particles or waves, and not a function of the number of particles or waves present. A large flood of particles or waves will not cause ionization if the individual particles or waves are not energetic enough. These ionizations, if enough occur, can be destructive to biological organisms, and can cause DNA damage in individual cells. Extensive doses of ionizing radiation have been shown to have a mutating effect to future generations of the individual receiving the dose. Examples of ionizing radiation are energetic Beta particles, neutrons, alpha particles and energetic photons (UV and above). The amount of energy required to ionize an atom or molecule may widely vary. X-rays and gamma rays will ionize almost any molecule or atom; Far ultraviolet, near ultraviolet and visible light are ionizing to very few molecules; microwaves and radio waves are non-ionizing radiation.
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I·on·i·zing radiation n. High-energy radiation capable of producing ionization in substances through which it passes. [more]Ionizing radiation - Community and Resources

Noun
1. high-energy radiation capable of producing ionization in substances through which it passes
(hypernym) radiation
(hyponym) alpha radiation, alpha ray

Radiation that can strip electrons from atoms; e.g. alpha, beta, and gamma radiation.

Alpha particles, beta particles, gamma rays, x-rays, neutrons, high-speed electrons, high-speed protons, and other particles capable of producing ions. Radiation, as used in 10 CFR Part 20, does not include non-ionizing radiation, such as radio- or microwaves, or visible, infrared, or ultraviolet light (see also 10 CFR 20.1003).