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gamma ray

   Also found in: Medical, Acronyms, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
gamma ray
n.
Electromagnetic radiation emitted by radioactive decay and having energies in a range from ten thousand (104) to ten million (107) electron volts.
gamma ray
A stream of high-energy electromagnetic radiation given off by an atomic nucleus undergoing radioactive decay. Because the wavelengths of gamma rays are shorter than those of x-rays, gamma rays have greater energy and penetrating power than x-rays. Gamma rays are emitted by pulsars, quasars, and radio galaxies but cannot penetrate the Earth's atmosphere. See more at radioactive decay.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.gamma ray - electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
gamma radiation
electromagnetic radiation, electromagnetic wave, nonparticulate radiation - radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
electromagnetic spectrum - the entire frequency range of electromagnetic waves


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Was GRB 060218 "unique" because it produced a burst of gamma rays or because its axis was pointed our way?
No direction home? by Wilson, Peter / Science News
As chunks of material collide, they produce gamma rays.
Spotlight on an exploding star by Sohn, Emily / Science News for Kids
The calibration and irradiation of instruments that measure x rays and gamma rays are performed in terms of the physical quantity: air-kerma.
NIST PUBLISHES SPECIAL PUBLICATION 250-58: CALIBRATION OF X-RAY AND ... by Journal of Research of the National Institute of Standards and Technology
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