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gamma ray

noun, Physics.
a photon of penetrating electromagnetic radiation (gamma radiation) emitted from an atomic nucleus.
a photon emitted by an electron as a result of internal conversion.
electromagnetic radiation with wavelengths shorter than approximately one tenth of a nanometer.
Origin of gamma ray
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for gamma ray
  • They can't find it and they need the best gamma ray scientist for the job.
  • OK, so there's no such thing as a gamma ray machine that zaps scientists and turns them into giant green monsters.
  • Certain gamma ray frequencies correspond to the chemical signature of explosives.
  • Those gamma ray bursts from the early universe could have been anywhere in the universe.
  • Also gamma ray bursters if they are aimed our way can do much the same thing, with no warning.
  • If your talking about gamma ray interactions coming from outside the chamber, it wouldn't make sense, obviously.
  • We need to be insured in case of asteroid impacts, or gamma ray bursts from space.
  • The gamma ray logs can detect shale partings in a coal bed, but generally the thickness of thin partings is exaggerated.
  • gamma ray spectrometry for the identification of nuclear materials is valuable to homeland security.
gamma ray in Medicine

gamma ray n.
Electromagnetic radiation emitted from the nucleus of an atom by radioactive decay and having energies in a range from ten thousand (104) to ten million (107) electron volts.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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gamma ray in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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