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ABSTRACT
The exploration of matter is carried out, notably at the atomic level, via the interaction between atoms and an incident radiation that can be X-photons , slow or fast electrons, neutrons, infrared, ultraviolet, high-frequency radiations, etc. The exploration techniques presented in this article are essentially based on electron diffraction. A presentation of the particle-atoms interactions and certain notions on crystallography are required in order to understand these techniques.
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Read the articleAUTHORS
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Bernard JOUFFREY: MSS-Mat Laboratory, UMR-CNRS 8579 - École Centrale Paris
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Richard PORTIER: École nationale supérieure de chimie de Paris - University of Paris VI
INTRODUCTION
Matter is explored, particularly at the atomic scale, through the interaction between atoms (their nuclei or electronic companions) and incident radiation (X-ray photons, slow electrons, fast electrons, neutrons, infrared, ultraviolet and high-frequency radiation, etc.). In this dossier, we'll focus on electron diffraction. We'll look at the main features and make a few references to X-rays and neutrons.
In this first section, we present an approach to particle-atom interactions and introduce a few crystallographic concepts.
In the second part , we present the laws of diffraction as applied to the study of atomic structures and, in particular, those of metals and metal alloys.
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