gamma ray

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gamma ray

Penetrating very short-wavelength electromagnetic radiation, similar to an X-ray but of higher energy, that is emitted spontaneously by some radioactive substances (see gamma decay; radioactivity). Gamma radiation also originates in the decay of certain subatomic particles and in particle-antiparticle annihilation (see also antimatter). Gamma rays can initiate nuclear fission, can be absorbed by ejection of an electron (see photoelectric effect), and can be scattered by free electrons (see Compton effect).

gamma ray [′gam·ə ‚rā]

(nuclear physics)

A high-energy photon, especially as emitted by a nucleus in a transition between two energy levels.

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No references found			Byline: ANI Washington, November 3 (ANI): NASA's Fermi telescope has detected gamma rays from "star factories" in other galaxies. Gamma rays from "star factories" in galaxies other than Milky Way ... by Asian News International The event, designated GRB 090423, was first detected by the American space agency Nasa's Swift satellite, which is designed to spot gamma ray bursts. Snapshot of our very distant past by Coventry Evening Telegraph (England) Many astronomers believe that as the star fades away and becomes a black hole, it shoots gamma rays into space. Watching deep-space fireworks by Ornes, Stephen / Science News for Kids			Gamio, Manuel Gamma gamma acid gamma camera gamma correction gamma counter gamma cross section gamma decay gamma distribution gamma emission gamma flux density Gamma Function gamma gage Gamma Globulin gamma heating gamma hemolysis gamma iron gamma irradiation gamma logging gamma matrix Gamma Moth gamma protein Gamma Radiation gamma radiography gamma random variable gamma ray Gamma rays gamma scanning Gamma Scintigraph Gamma Spectrometer Gamma Spectroscopy gamma structure gamma taxonomy Gamma Therapy gamma transition gamma-absorption gage Gamma-Aminobutyric Acid gamma-ray altimeter Gamma-Ray Astronomy gamma-ray bursts gamma-ray detector Gamma-ray detectors gamma-ray laser gamma-ray level indicator Gamma-Ray Observatory gamma-ray probe gamma-ray scattering Gamma-Ray Source gamma-ray spectrometry gamma-ray spectroscopy gamma-ray spectrum			Gamma particle Gamma particle Gamma particles Gamma particles Gamma particles Gamma Phi Beta Gamma Phi Kappa Gamma photon Gamma photon Gamma photon Gamma point gamma protein Gamma quantum Gamma quantum Gamma quantum Gamma quantum gamma r gamma r gamma r gamma r gamma r's, gamma r's, gamma r's, gamma r's, gamma radiation gamma radiation gamma radiation gamma radiation gamma radiography gamma random variable gamma ray Gamma Ray Amplification By Stimulated Emission of Radiation Gamma ray astronomy Gamma ray astronomy Gamma ray astronomy Gamma Ray Astronomy Program Working Group Gamma Ray Attenuation Gamma ray burst Gamma ray burst Gamma ray burst Gamma ray burster Gamma ray bursts Gamma ray detector Gamma Ray Explorer Gamma Ray Gauge Gamma Ray Imaging Device Gamma Ray Imaging Payload Gamma Ray Imaging Telescope System Gamma Ray Large Area Space Telescope Gamma ray laser Gamma Ray Observatory Gamma Ray Observatory Gamma Ray Polarimeter Experiment Gamma Ray Source Gamma ray spectrometer Gamma ray spectrometry Gamma ray spectroscopy Gamma rays Gamma rays Gamma rays Gamma rays

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