annihilation radiation


annihilation radiation
electromagnetic radiation produced by the coalescence and mutual annihilation of a positron and an electron, each pair forming two photons having a minimum energy of 0.5 million electron volts each.
[1960-65]

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Universalium. 2010.

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  • Annihilation radiation — is a term used in Gamma spectroscopy for the gamma radiation produced when a particle and Antiparticle collide. Most commonly, this refers to 511 keV gamma rays produced by a gamma ray undergoing Pair production [Knoll, G: Radiation Detection and …   Wikipedia

  • annihilation radiation — noun : radiation produced by the mutually annihilating coalescence of an electron and a positron from which two radiation quanta travel in opposite directions with a wavelength corresponding to that of very short gamma rays, being approximately 0 …   Useful english dictionary

  • annihilation radiation — anihiliacijos spinduliavimas statusas T sritis fizika atitikmenys: angl. annihilation radiation vok. Annihilationsstrahlung, f; Vernichtungsstrahlung, f rus. аннигиляционное излучение, n; излучение аннигиляции, n pranc. rayonnement d’annihilation …   Fizikos terminų žodynas

  • annihilation radiation — radiation produced by the collision and annihilation of a particle and its antiparticle, especially the two 0.511 MeV gamma ray photons produced by the annihilation of a positron and an electron …   Medical dictionary

  • annihilation radiation — /ənaɪəˌleɪʃən reɪdiˈeɪʃən/ (say uhnuyuh.layshuhn raydee ayshuhn) noun the radiation produced when a particle and an antiparticle, such as an electron and a positron, interact and disappear with a resultant release of energy …   Australian English dictionary

  • Radiation protection — Radiation protection, sometimes known as radiological protection, is the science of protecting people and the environment from the harmful effects of ionizing radiation, which includes both particle radiation and high energy electromagnetic… …   Wikipedia

  • radiation measurement — ▪ technology Introduction       technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement.       The term ionizing radiation refers to those… …   Universalium

  • annihilation — /euh nuy euh lay sheuhn/, n. 1. the act or an instance of annihilating. 2. the state of being annihilated; extinction; destruction. 3. Physics. a. Also called pair annihilation. the process in which a particle and antiparticle unite, annihilate… …   Universalium

  • radiation — 1. The act or condition of diverging in all directions from a center. 2. The sending forth of light, short radio waves, ultraviolet or x rays, or any other rays for treatment or diagnosis or for other purpose. Cf.:irradiation (2). 3. SYN:… …   Medical dictionary

  • annihilation — n. 1 the act or process of annihilating. 2 Physics the conversion of a particle and an antiparticle into radiation. Etymology: F annihilation or LL annihilatio (as ANNIHILATE) …   Useful english dictionary