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Gamma photons

См. также в других словарях:

  • 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 camera — A gamma camera is a device used to image gamma radiation emitting radioisotopes, a technique known as scintigraphy. The applications of scintigraphy include early drug development and nuclear medical imaging to view and analyse images of the… …   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 progenitors — are the types of celestial objects that can emit gamma ray bursts (GRBs). GRBs show an extraordinary degree of diversity. They can last anywhere from a fraction of a second to many minutes. Bursts could have a single profile or oscillate wildly… …   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 — Gam ma ray n. (Physics) A very penetrating electromagnetic ray not appreciably deflected by a magnetic or electric field, emitted by radioactive substances. Gamma rays are photons of electromagnetic radiation having a wavelength shorter than that …   The Collaborative International Dictionary of English

  • gamma camera — n a camera that detects the gamma ray photons produced by radionuclide decay and is used esp. in medical diagnostic scanning to create a visible record of a radioactive substance injected into the body * * * a piece of apparatus that detects… …   Medical dictionary

  • Gamma Rays —    Photons of energy that are the most energetic form of electromagnetic radiation …   The writer's dictionary of science fiction, fantasy, horror and mythology

  • Photons — Photon Photon Photons émis dans le faisceau cohérent d’un laser Propriétés générales Classification Boson Composition Élémentaire Groupe …   Wikipédia en Français

  • Gamma caméra — Scintigraphie La scintigraphie est une méthode d imagerie médicale qui procède par l administration, dans l organisme, d isotopes radioactifs afin de produire une image médicale par la détection des rayonnements émis par ces isotopes après… …   Wikipédia en Français

  • 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

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