TERMIUM Plus^®

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Other evidence for the existence of inner-shell-excited resonances comes from observations of the M-series x-ray spectrum of metallic lanthanum excited by near-threshold electron impact...  1, record 1, English, - inner%2Dshell%2Dexcited%20resonance

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We believe that the inner-shell-excited state has the ls hole partially localized at one of the nitrogen atoms, ... and that the [pi] 2p orbital of this state is similar to the outer [pi] 2p orbital of the neutral NO molecule. The inner-shell-excited resonance should therefore have a structure similar to that of the NO [negative] shape resonances ...  1, record 1, English, - inner%2Dshell%2Dexcited%20resonance

Record 1,  Textual support,  French

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Les ions négatifs transitoires (résonances) jouent un rôle important dans les collisions électron-molécule à basse énergie. Ces résonances étaient jusqu'ici classées en deux grands types : les résonances de forme, où l'électron est piégé derrière une barrière de potentiel centrifuge, et les résonances à cœur excité (ou de Feshbach), dans lesquelles l'électron incident de faible énergie excite la molécule et se retrouve avec une énergie négative, donc lié.  2, record 1, French, - r%C3%A9sonance%20%C3%A0%20c%26oelig%3Bur%20excit%C3%A9

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Les ouvrages consultés indiquent que «résonance de Feshbach» et «résonance à cœur excité» ne désignent pas exactement la même notion.  3, record 1, French, - r%C3%A9sonance%20%C3%A0%20c%26oelig%3Bur%20excit%C3%A9

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Record 2,  Textual support,  English

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In scanning electron microscopy(SEM), a fine probe of electrons with energies typically up to 40 keV [kiloelectron volts] is focused on a specimen, and scanned along a pattern of parallel lines. Various signals are generated as a result of the impact of the incident electrons, which are collected to form an image or to analyse the sample surface. These are mainly secondary electrons, with energies of a few tens of eV [electron volts], high-energy electrons backscattered from the primary beam and characteristic X-rays.  5, record 2, English, - scanning%20electron%20microscopy

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Microscopie électronique à balayage. Les microscopes électroniques à balayage (MEB) utilisent un faisceau d'électrons balayés hautement énergétique pour examiner la surface d'un échantillon.  6, record 2, French, - microscopie%20%C3%A0%20balayage

Record 2,  Textual support,  Spanish

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Técnica [que] se utiliza para la observación y análisis de superficies suministrando información de relieve, textura, tamaño y forma de grano y composición química [...] de muestras biológicas y minerales.  1, record 2, Spanish, - microscop%C3%ADa%20electr%C3%B3nica%20de%20barrido

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SEM por sus siglas en inglés.  2, record 2, Spanish, - microscop%C3%ADa%20electr%C3%B3nica%20de%20barrido

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Impact ionization and avalanche multiplication of electrons and holes in the presence of a large electric field. The excess energy is given off to generate an electron-hole pair through a band-to-band transition. This generation process causes avalanche multiplication in semiconductor diodes under high reverse bias : As one carrier accelerates in the electric field it gains energy. The kinetic energy is given off to an electron in the valence band, thereby creating an electron-hole pair. The resulting two electrons can create two more electrons which generate four more causing an avalanche multiplication effect. Electrons as well as holes contribute to avalanche multiplication.  1, record 3, English, - avalanche%20multiplication%20effect

Record 3,  Textual support,  French

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Effet qui se manifeste par l'augmentation rapide des porteurs de charge lorsqu'un champ électrique intense agit sur un semi-conducteur.  1, record 3, French, - effet%20d%27avalanche

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Record 5,  Textual support,  English

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A cathode-ray tube whose screen has the property of darkening under the impact of an electron beam.  2, record 5, English, - skiatron

Record 5,  Textual support,  French

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Tube cathodique dont l'écran possède la propriété de donner une trace sombre sous l'impact du faisceau électronique.  2, record 5, French, - tube%20%C3%A0%20trace%20sombre

Record 5,  Textual support,  Spanish

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Tubo catódico cuya pantalla posee la propiedad de dar una traza oscura al impacto de haz electrónico.  1, record 5, Spanish, - tubo%20de%20traza%20oscura

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Ionization resulting from the collision of a particle with a positively or negatively charged ion.  3, record 6, English, - chemical%20ionization

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Mass spectrometry.... Methods of ion production. For analysis of organic compounds the principal methods are electron impact, chemical ionization, field ionization, and field desorption... Chemical ionization. Here the ions to be analysed are produced by transfer of a heavy particle... to the sample from ions produced from a reactant gas.  4, record 6, English, - chemical%20ionization

Record 6,  Textual support,  French

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Ionisation résultant d'une collision d'une particule avec un ion chargé positivement ou négativement.  2, record 6, French, - ionisation%20chimique

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Spectrométrie de masse [...] Ionisation chimique. Elle équipe pratiquement tous les appareils modernes destinés à l'analyse organique [...] L'ionisation, qui fait intervenir un gaz réactant, (le méthane par exemple,) s'effectue en plusieurs étapes : Ionisation par bombardement électronique du gaz réactant à pression élevée [...] Réactions ions-molécules du gaz réactant [...] Ionisation du composé organique [...] par transfert de protons [...], par transfert de chaînes alcoyles [...], par abstraction de H^- ou de chaînes alcoyles.  3, record 6, French, - ionisation%20chimique

Record 6,  Textual support,  Spanish

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En la ionización química los átomos gaseosos de la muestra (tanto de un sistema de entrada indirecto como de una sonda caliente) se ionizan al colisionar con los iones producidos al bombardear con electrones un exceso de gas reactivo (normalmente metano). Normalmente se utilizan iones negativos [...]  2, record 6, Spanish, - ionizaci%C3%B3n%20qu%C3%ADmica

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Strongly shocked gneiss fragments from the allochthonous polymict breccia of the 23 Ma old Haughton impact crater were studied by optical microscopy, electron probe microanalysis(EPMA) and analytical transmission electron microscopy(ATEM).  2, record 7, English, - shocked%20gneiss

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shocked gneiss: term used at Natural Resources Canada - Earth Sciences Sector.  3, record 7, English, - shocked%20gneiss

Record 7,  Textual support,  French

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La métasomatose a eu lieu après l'impact : elle affecte les roches ayant subi le choc [...]. La température relativement élevée de la phase fluide et la restriction des zones riches en Ca aux roches affectées par l'impact montrent que la métasomatose était liée à l'impact.  2, record 7, French, - gneiss%20ayant%20subi%20un%20choc

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gneiss ayant subi un choc : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.  3, record 7, French, - gneiss%20ayant%20subi%20un%20choc

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Record 8,  Textual support,  English

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An area of reduced luminance resulting from the destruction of some of the active material of the screen by prolonged electron or ion impact.  2, record 8, English, - screen%20burn

Record 8,  Textual support,  French

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Zone de luminance réduite causée par la détérioration du matériau actif de l'écran par action prolongée de l'impact des électrons ou des ions.  1, record 8, French, - br%C3%BBlure%20d%27%C3%A9cran

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Record 9,  Textual support,  English

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... the quotient of the displacement of the electron beam at the place of impact by the change in the deflecting field.  1, record 9, English, - deflection%20sensitivity

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It is usually expressed in millimeters per volt applied between the deflecting electrodes or in millimeters per gauss of the deflecting magnetic field.  1, record 9, English, - deflection%20sensitivity

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Record 10,  Textual support,  English

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Model for an optically thin plasma of low density in which excitations and ionizations are due to electron impact while decay and recombination take place by radiation.  2, record 10, English, - corona%20model

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corona model: term and definition standardized by ISO.  3, record 10, English, - corona%20model

Record 10,  Textual support,  French

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Modèle de plasma optiquement mince de faible densité dans lequel les excitations et les ionisations sont dues aux chocs d'électrons alors que les désintégrations et les recombinaisons se produisent par rayonnement.  2, record 10, French, - mod%C3%A8le%20couronne

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modèle couronne : terme et définition normalisés par l'ISO.  3, record 10, French, - mod%C3%A8le%20couronne

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Record 11,  Textual support,  English

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The small luminescent area of the screen surface, or target area, excited by the impact of the electron beam.  2, record 11, English, - spot

Record 11,  Textual support,  French

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Petite zone luminescente de la surface de l'écran, ou zone de la cible, excitée par l'impact du faisceau électronique.  1, record 11, French, - spot

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Record 12,  Textual support,  English

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The lowest energy which must be imparted to the parent molecule to cause it to produce a particular specified fragment ion. This energy, usually stated in electron volts, may be imparted by electron impact, by photon impact, or in other ways.  1, record 12, English, - appearance%20energy

Record 12,  Textual support,  French

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[...] énergie la plus faible qu'il faut fournir au composé parent pour qu'il produise un ion fragment donné défini. Cette énergie, habituellement indiquée en électron-volts, peut être fournie par impact électronique, impact photonique ou d'une autre façon.  1, record 12, French, - %C3%A9nergie%20d%27apparition

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Record 13,  Textual support,  English

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Thermionic or Electron Impact Detector. In 1957, Ryce and Bryce described a sensitive ionization gauge based on the ionization potentials of vapors. It comprised a filament, a grid, and a plate. The potential difference between the filament and grid accelerated electrons which may ionize any gas in their path. If the grid potential is maintained at a level insufficient to ionize the helium carrier gas... no current flows in the plate circuit. If a potential difference of 18 V is maintained between the filament and the grid, compounds of lower ionization potential in the helium will be ionized and the positive ions produced will yield a cathode current, the current noted being a measure of the ion concentration. Into the modified ionizing chamber, operated at reduced pressure, a small fraction of the column effluent gas stream(less than 0. 5%) was allowed to flow into the gauge through a controlled leak. Over a 0. 02-l. 5 mm Hg pressure range, the sensitivity was approximately proportional to the pressure, and sensitivities in the range of 10[ minus superscript 12] mole were claimed.  1, record 13, English, - electron%20impact%20detector

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... ion sources fall into three major categories :... for positive-ion generation,... for negative ion generation, and a highly specialized type of source designed to produce a polarized ion beam.... The principal methods of positive-ion formation are electron impact, surface ionization, spark discharge... [in this Patter technique] a spark is induced between two electrodes, one of which, at least, contains the element to be ionized... the spark consists of a high density, high-temperature plasma from which ions can be extracted.  2, record 14, English, - spark%20source

Record 14,  Textual support,  French

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L'ionisation par étincelles est utilisée pour l'analyse élémentaire des solides minéraux conducteurs de l'électricité ou rendus tels. Avec le matériau dont on veut connaître la composition, on réalise [...] deux électrodes [...] reliées, sous vide, aux bornes d'un générateur haute fréquence [...] et haute tension [...] Lorsque la distance inter-électrodes [...] diminue, des claquages apparaissent; ils produisent [...] un grand nombre d'ions mono et polychargés [...] Ces ions sont accélérés et dirigés vers un spectromètre; [...]  1, record 14, French, - source%20%C3%A0%20ionisation%20par%20%C3%A9tincelles

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Record 15,  Textual support,  English

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The principal methods of positive-ion formation are electron impact, surface ionization, spark discharge.... Surface ionization. Atoms possessing low ionization potentials can be ionized by allowing them to strike a heated surface having a high work function... the atom will be thermally desorbed as a positive ion.  1, record 15, English, - surface%20ionization

Record 15,  Textual support,  French

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Source à ionisation de surface (ou thermo-ionisation) (...) On dirige sous vide, vers une surface métallique chauffée (...) la vapeur atomique d'un élément (...) La faible dispersion énergétique des ions produits (...) permet leur analyse par un simple lecteur magnétique.  1, record 15, French, - ionisation%20de%20surface

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Ce procédé fournit des courants d'ions intenses (...) et stables pour tous les éléments de faible potentiel d'ionisation (alcalins, ternes, rares, etc.).  1, record 15, French, - ionisation%20de%20surface

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Record 16,  Textual support,  English

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Methods of ion production. For analysis of organic compounds the principal methods are electron impact, chemical ionization, field ionization and field desorption. Electron impact. When a gaseous sample of a molecular compound is ionized with a beam of energetic... electrons, part of the energy is transferred to the ion formed by the collision....  1, record 16, English, - electron%20impact

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Examples of ion sources utilizing this concept are the duoplasmatron and the Penning ion source.  1, record 16, English, - electron%20impact

Record 16,  Textual support,  French

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Ionisation par bombardement électronique (...) L'échantillon, en phase vapeur et sous faible pression (...) est bombardé par un faisceau d'électrons (...) émis par un filament de tungstène ou de rhénium (...) La plus grande partie des ions formés sont chargés positivement (...) La notation M[exposant]+. signifie que l'on obtient un ion moléculaire radicalaire (...) à partir de la molécule M.  1, record 16, French, - bombardement%20%C3%A9lectronique

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Record 17,  Textual support,  English

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The area instantaneously affected by the impact of an electron beam of a cathode-ray tube.  1, record 17, English, - spot

Record 17,  Textual support,  French

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tache produite sur l'écran d'un oscilloscope par l'impact des électrons.  1, record 17, French, - spot

Record 17,  Textual support,  Spanish