gamma-ray photon

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• gamma ray — Physics. 1. a photon of penetrating electromagnetic radiation (gamma radiation) emitted from an atomic nucleus. 2. a photon emitted by an electron as a result of internal conversion. 3. electromagnetic radiation with wavelengths shorter than… …   Universalium

• Gamma ray — Gamma rays (denoted as gamma;) are a form of electromagnetic radiation or light emission of frequencies produced by sub atomic particle interactions, such as electron positron annihilation or radioactive decay. Gamma rays are generally… …   Wikipedia

• Gamma-ray astronomy — is the astronomical study of the cosmos with gamma rays. Early history Long before experiments could detect gamma rays emitted by cosmic sources, scientists had known that the universe should be producing these photons. Work by Eugene Feenberg… …   Wikipedia

• Gamma ray burst emission mechanisms — are theories that explain how the energy from a gamma ray burst progenitor (regardless of the actual nature of the progenitor) is turned into radiation. These mechanisms are a major topic of research as of 2007. Neither the light curves nor the… …   Wikipedia

• gamma ray — n a photon emitted spontaneously by a radioactive substance also a high energy photon usu. used in pl …   Medical dictionary

• Gamma ray spectrometer — A Gamma Ray Spectrometer, or (GRS), is an instrument for measuring the distribution (or spectrum see figure) of the intensity of gamma radiation versus the energy of each photon. Gamma rays are electromagnetic radiation at the short wavelength,… …   Wikipedia

• Gamma ray burst — [ GRB 990123 taken on January 23, 1999. The burst is seen as a bright dot denoted by a square on the left, with an enlarged cutout on the right. The object above it with the finger like filaments is the originating galaxy. This galaxy seems to be …   Wikipedia

• Gamma-ray Large Area Space Telescope — Illustration des FGST (GLAST) Satelliten GLAST bei den Startvorbereitungen …   Deutsch Wikipedia

• gamma ray — noun electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength • Syn: ↑gamma radiation • Hypernyms: ↑electromagnetic radiation, ↑electromagnetic wave, ↑nonparticulate radiation • Part Holonyms: ↑ …   Useful english dictionary

• gamma ray — Synonyms and related words: Becquerel ray, Grenz ray, Roentgen ray, X radiation, X ray, actinic ray, actinism, alpha radiation, alpha ray, anode ray, atomic beam, atomic ray, beam, beam of light, beta radiation, beta ray, canal ray, cathode ray,… …   Moby Thesaurus

• gamma ray — noun Date: 1903 a photon emitted spontaneously by a radioactive substance; also a photon of higher energy than that of an X ray usually used in plural …   New Collegiate Dictionary