TERMIUM Plus^®

Record 1,  Textual support,  English

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An instrument for determining the energy distribution of gamma rays.  5, record 1, English, - gamma%2Dray%20spectrometer

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Gamma rays are electromagnetic radiation at the short-wavelength, or high-frequency, end of the electromagnetic(EM) spectrum, which ranges from gamma rays(short) to radio(long). The study and analysis of gamma-ray spectra for scientific and technical use is called gamma spectroscopy, and gamma-ray spectrometers are the instruments which observe and collect such data. Because the energy of each photon of EM radiation is proportional to its frequency, gamma rays have sufficient energy that they are typically observed by counting individual photons.  2, record 1, English, - gamma%2Dray%20spectrometer

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The gamma-ray spectrometer is used for detecting iron, magnesium titanium, thorium and potassium. It is also used for identifying samples of unknown composition.  6, record 1, English, - gamma%2Dray%20spectrometer

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gamma ray spectrometer: term standardized by the International Electrotechnical Commission (IEC).  7, record 1, English, - gamma%2Dray%20spectrometer

Record 1,  Textual support,  French

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Appareil qui permet de déterminer le spectre d'énergie des rayons gamma.  3, record 1, French, - spectrom%C3%A8tre%20gamma

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Les spectromètres à rayons gamma actuels permettent de donner une analyse précise [...] et rapide de la concentration en uranium, thorium et potassium dans les roches ou les sols. [...] Les spectromètres à rayons gamma fonctionnent sur le même principe que le scintillomètre à l'exception qu'ils utilisent les caractéristiques relatives à l'intensité ou l'énergie spécifique des rayons gamma des isotopes radioactifs.  4, record 1, French, - spectrom%C3%A8tre%20gamma

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spectromètre gamma : terme normalisé par la Commission électrotechnique internationale (CEI).  5, record 1, French, - spectrom%C3%A8tre%20gamma

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Record 2,  Textual support,  English

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Most radioactive sources produce gamma rays of various energies and intensities. When these emissions are collected and analyzed with a gamma-ray spectroscopy system, a gamma-ray energy spectrum can be produced.  2, record 2, English, - gamma%2Dray%20energy%20spectrum

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Record 4,  Textual support,  English

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Violent outbursts of energy in the form of X-rays or gamma rays that are observable only above the earth’s atmospheric shield.  2, record 4, English, - high%2Denergy%20transient

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We report the detection of an unusual high-energy transient by the gamma-ray burst detector onboard the satellite Ginga. The spectral properties of this event, which we refer to as a Medium Energy Burst(MEB900129), place it between those of Type IX-ray bursts and classical gamma-ray bursts. The event was much softer than classical gamma-ray bursts, with a spectrum that peaks between 16-18 keV, and decreases both above and below the peak.  3, record 4, English, - high%2Denergy%20transient

Record 4,  Textual support,  French

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L'Explorateur des phénomènes transitoires de haute énergie, un satellite dédié à l'étude des sursauts gamma cosmiques.  1, record 4, French, - ph%C3%A9nom%C3%A8ne%20transitoire%20de%20haute%20%C3%A9nergie

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Les phénomènes cosmiques de haute énergie concernent notamment les objets compacts et leurs environnements (AGNs, Trous Noirs galactiques, microquasars, étoiles à neutrons et pulsars), impliquant l'accrétion de plasmas chauds et des phénomènes relativistes, souvent accompagnés d'éjections quasi continues (jets puissants) ou explosives (SuperNovae et Gamma Ray Bursts); ces éjections sont sources de rayonnements de haute énergie et de rayons cosmiques; ce sont, avec les défauts topologiques et les reliquats des transitions de phase primordiales, les explications possibles à l'énigme des rayons cosmiques de très haute énergie.  3, record 4, French, - ph%C3%A9nom%C3%A8ne%20transitoire%20de%20haute%20%C3%A9nergie

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

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In a gamma-ray spectrum, a peak produced when incident gamma-rays interact with the detector by pair production, producing an electron and positron followed by subsequent annihilation of the positron and generation of two new 511 keV photons, one of which escapes from the detector without depositing its energy.  1, record 5, English, - single%2Descape%20peak

Record 5,  Textual support,  French

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En pratique, le détecteur a une taille finie, donc la taille du détecteur est un facteur important dans la détection de [...] photons [...] certains photons subiront des diffusions multiples, mais ne déposeront pas toute leur énergie. Le spectre gamma ainsi obtenu sera donc divisé en plusieurs composantes : - pics d'absorption totale; - fond Compton ; - fond des diffusions multiples;- pics de simple et double échappement (respectivement lorsqu'un ou les deux photons d'annihilation sortent du détecteur sans interagir); - pic d'annihilation (électron, positron) à 511 keV [...]  1, record 5, French, - pic%20de%20simple%20%C3%A9chappement

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Record 6,  Textual support,  English

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In a gamma-ray spectrum, a peak produced when incident gamma rays of a certain energy interact with the detector by pair production, producing an electron and positron followed by subsequent annihilation of the positron and generation of two new 511 keV photons, both of which escape from the detector without depositing their energy...  1, record 6, English, - double%20escape%20peak

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish