TERMIUM Plus^®

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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 3,  Textual support,  English

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The planar detector consists of a crystal of either rectangular or circular cross section and a sensitive thickness of 1-20 mm... The electric field is perpendicular to the cross-sectional area of the crystal. The crystal thickness is selected on the basis of the gamma-ray energy region relevant to the application of interest, with the small thicknesses optimum for low-energy measurements(for example in the L-x-ray region for special nuclear material). Planar detectors usually achieve the best energy resolution, because of their low capacitance; they are preferred for detailed spectroscopy, such as the analysis of the complex low-energy gamma-ray and x-ray spectra of uranium and plutonium.  1, record 3, English, - planar%20detector

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Solid-state detectors are produced mainly in two configurations: planar and coaxial. These terms refer to the detector crystal shape and the manner in which it is wired into the detector circuit.  1, record 3, English, - planar%20detector

Record 3,  Textual support,  French

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Détecteurs réalisés selon la technique d’implantation ionique «planaire». La technologie de fabrication des détecteurs [au] silicium a beaucoup évolué au cours du dernier demi-siècle grâce aux progrès de la microélectronique. Aujourd’hui, on utilise le procédé d’implantation passivée planaire (ou Implantation Planar Process) qui a complètement supplanté les techniques de fabrication des détecteurs à barrière de surface ou à jonction diffusée. La technique actuelle basée sur l’utilisation d’implanteurs (accélérateurs d’ions de faible énergie), permet de réaliser des jonctions abruptes et minces grâce à un contrôle très précis de la position en profondeur des dopants (B pour type P et As pour type N) à l’intérieur d’un substrat de Si (réduction de la zone morte du dispositif) de haute résistivité (de type N–). Celui-ci est recouvert d’une couche mince de passivation (SiO₂) afin de minimiser les courants de fuite de surface. Un traitement chimique par photolithographie permet de définir la géométrie finale du détecteur.  2, record 3, French, - d%C3%A9tecteur%20planaire

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Record 4,  Textual support,  English

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The ESA scientific mission INTEGRAL(The International Gamma-Ray Astrophysics Laboratory is dedicated to the fine spectroscopy(E/E=500) and fine imaging(angular resolution : 12 arcmin FWHM) of celestial gamma-ray sources in the energy range 15 keV to 10 MeV with concurrent source monitoring in the X-ray(3-35 keV) and optical(V-band, 550 nm) energy ranges.  2, record 4, English, - International%20Gamma%20Ray%20Astrophysics%20Laboratory

Record 4,  Textual support,  French

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Les préparatifs de la mission INTEGRAL - observatoire international du rayonnement Gamma de l'Agence spatiale européenne (ESA) - et la participation de l'Irlande à ce projet seront présentés lors d'une conférence de presse organisée le 4 octobre prochain (à partir de 12h00) à Dublin par la Royal Irish Academy (RIA - 19 Dawson Street,Dublin 2), Enterprise Ireland et l'ESA.  2, record 4, French, - Observatoire%20international%20du%20rayonnement%20gamma

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Record 5,  Textual support,  English

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Much of the research imaging is done on state-of-the-art clinical equipment, including a 0-2T rampable whole-body magnetic resonance system capable of proton imaging(MRI) at 1. 5T and 2T; 31P, 1H and 2H magnetic resonance spectroscopy(MRS) at 1. 5T and 2T; and 18F MRS at 1. 59T; a spiral CT scanner capable of one image per second; a digital radiography system; a bone mineral densitometer; three single photon emission computed tomography(SPECT) nuclear medicine gamma-ray imaging systems; a NaI(Tl) radioisotope gamma-ray spectrometer(for determination of absolute tissue blood flow). ["ADVANCED IMAGING RESEARCH GROUP(AIRG) "]  2, record 5, English, - spiral%20CT%20scanner

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Elscint Announces FDA Clearance for its Spiral CT Scanner, the SeleCT/SP.  3, record 5, English, - spiral%20CT%20scanner

Record 5,  Textual support,  French

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Pas de grande nouveauté, deux pôles d'intérêt attendus : le scanner spiralé et la cholangio-wirsungo IRM.  1, record 5, French, - scanner%20spiral%C3%A9

Record 5,  Textual support,  Spanish