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Die niederenergetische Ionenstreuspektrosk … Die niederenergetische Ionenstreuspektroskopie (auch „Streuspektroskopie niederenergetischer Ionen“, engl. Low Energy Ion Scattering, LEIS) ist ein oberflächenanalytisches Verfahren zur elementaren Analyse von Festkörpern. Es gehört zu der Gruppe der Ionenstreuspektroskopie (engl. Ion Scattering Spectroscopy, ISS). Häufig findet man auch die synonyme Nutzung der Begriffe ISS und LEIS in Abgrenzung zur Rutherford-Rückstreu-Spektrometrie (engl. Rutherford Backscattering Spectrometry, RBS).herford Backscattering Spectrometry, RBS).
, Low-energy ion scattering spectroscopy (LE … Low-energy ion scattering spectroscopy (LEIS), sometimes referred to simply as ion scattering spectroscopy (ISS), is a surface-sensitive analytical technique used to characterize the chemical and structural makeup of materials. LEIS involves directing a stream of charged particles known as ions at a surface and making observations of the positions, velocities, and energies of the ions that have interacted with the surface. Data that is thus collected can be used to deduce information about the material such as the relative positions of atoms in a surface lattice and the elemental identity of those atoms. LEIS is closely related to both (MEIS) and high-energy ion scattering (HEIS, known in practice as Rutherford backscattering spectroscopy, or RBS), differing primarily in the energy range of the ion beam used to probe the surface. While much of the information collected using LEIS can be obtained using other surface science techniques, LEIS is unique in its sensitivity to both structure and composition of surfaces. Additionally, LEIS is one of a very few surface-sensitive techniques capable of directly observing hydrogen atoms, an aspect that may make it an increasingly more important technique as the hydrogen economy is being explored.as the hydrogen economy is being explored.
, La spectroscopie de diffusion d'ions (Ion … La spectroscopie de diffusion d'ions (Ion Scattering Spectroscopy (ISS), en anglais) est une technique d'analyse élémentaire par spectroscopie, se rapprochant de la spectrométrie de masse des ions secondaires (SIMS). Elle sert à caractériser la composition chimique et la structure des matériaux en surface. Par la conservation des moments cinétiques, il est possible de déduire la masse atomique relative (M2) de l'atome affecté par l'ion, à partir des caractéristiques connues (masse atomique relative de l'ion M1, énergie cinétique de "départ" de l'ion E0) et obtenues par l'expérience (énergie cinétique ES de l'ion dans le faisceau dispersé). Elle est également nommée spectroscopie de diffusion d'ions à faible énergie (Low-Energy Ion Scattering (LEIS), en anglais) l'énergie du faisceau d'ions étant très faible. Les techniques spectroscopie de diffusion d'ions à énergie moyenne (Medium-Energy Ion Scattering (MEIS), en anglais) et spectroscopie de diffusion d'ions à haute énergie (High-Energy Ion Scattering (HEIS) ou Rutherford Backscattering Spectroscopy (RBS) en anglais) fonctionnent sur le même principe, mais avec des énergies plus élevées (entre 20 et 200 keV pour le MEIS, de l'ordre du MeV pour le HEIS/RBS).MEIS, de l'ordre du MeV pour le HEIS/RBS).
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| rdfs:comment |
Low-energy ion scattering spectroscopy (LE … Low-energy ion scattering spectroscopy (LEIS), sometimes referred to simply as ion scattering spectroscopy (ISS), is a surface-sensitive analytical technique used to characterize the chemical and structural makeup of materials. LEIS involves directing a stream of charged particles known as ions at a surface and making observations of the positions, velocities, and energies of the ions that have interacted with the surface. Data that is thus collected can be used to deduce information about the material such as the relative positions of atoms in a surface lattice and the elemental identity of those atoms. LEIS is closely related to both (MEIS) and high-energy ion scattering (HEIS, known in practice as Rutherford backscattering spectroscopy, or RBS), differing primarily in the energy range , differing primarily in the energy range
, La spectroscopie de diffusion d'ions (Ion … La spectroscopie de diffusion d'ions (Ion Scattering Spectroscopy (ISS), en anglais) est une technique d'analyse élémentaire par spectroscopie, se rapprochant de la spectrométrie de masse des ions secondaires (SIMS). Elle sert à caractériser la composition chimique et la structure des matériaux en surface. et la structure des matériaux en surface.
, Die niederenergetische Ionenstreuspektrosk … Die niederenergetische Ionenstreuspektroskopie (auch „Streuspektroskopie niederenergetischer Ionen“, engl. Low Energy Ion Scattering, LEIS) ist ein oberflächenanalytisches Verfahren zur elementaren Analyse von Festkörpern. Es gehört zu der Gruppe der Ionenstreuspektroskopie (engl. Ion Scattering Spectroscopy, ISS). Häufig findet man auch die synonyme Nutzung der Begriffe ISS und LEIS in Abgrenzung zur Rutherford-Rückstreu-Spektrometrie (engl. Rutherford Backscattering Spectrometry, RBS).herford Backscattering Spectrometry, RBS).
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| rdfs:label |
Low-energy ion scattering
, Niederenergetische Ionenstreuspektroskopie
, Spectroscopie de diffusion d'ions
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