Rayons X
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Home > Art, Film & Photography > Rayons X: Rayon X, Spectrometrie de Fluorescence X, Diffractometrie de Rayons X, Tube a Rayons X, Charles Vaillant, Wilhelm Ront
Rayons X: Rayon X, Spectrometrie de Fluorescence X, Diffractometrie de Rayons X, Tube a Rayons X, Charles Vaillant, Wilhelm Ront

Rayons X: Rayon X, Spectrometrie de Fluorescence X, Diffractometrie de Rayons X, Tube a Rayons X, Charles Vaillant, Wilhelm Ront


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About the Book

Ce contenu est une compilation d'articles de l'encyclopedie libre Wikipedia. Pages: 33. Non illustre. Chapitres: Rayon X, Spectrometrie de fluorescence X, Diffractometrie de rayons X, Tube a rayons X, Charles Vaillant, Wilhelm Rontgen, Astronomie des rayons X, Compteur proportionnel a gaz, Rayonnement continu de freinage, Source X ultralumineuse, Laser a rayons X, Arthur Compton, Generateur de rayons X, Radiographie de coquillages, Karl Manne Georg Siegbahn, Scintillateur, Diffusion des rayons X aux petits angles, Sonde nucleaire PIXE, John Hall-Edwards, Victor Despeignes. Extrait: La spectrometrie de fluorescence X (SFX ou FX, ou en anglais XRF pour X-ray fluorescence) est une methode d'analyse chimique utilisant une propriete physique de la matiere, la fluorescence de rayons X. Lorsque l'on bombarde de la matiere avec des rayons X, la matiere reemet de l'energie sous la forme, entre autres, de rayons X; c'est la fluorescence X, ou emission secondaire de rayons X. Le spectre des rayons X emis par la matiere est caracteristique de la composition de l'echantillon, en analysant ce spectre, on peut en deduire la composition elementaire, c'est-a-dire les concentrations massiques en elements. L'analyse du spectre peut se faire de deux manieres: Henry Moseley, mort a 27 ans en 1915, a la bataille des Dardanelles, 2 ans apres avoir demontre que les rayons X emis par un echantillon obeissent a une relation, entre la longueur d'onde du rayon X et le numero atomique de l'echantillon, ouvrant ainsi la voie a ce qui va devenir la spectrometrie par fluorescence X Premier spectre de fluorescence X obtenu par W.H.Bragg et W.L.Bragg en 1913. Le rayonnement X etait produit par une cible de platine (Pt) et diffracte dans un cristal de NaCl. On observe, de gauche a droite, les 3 raies, et du Platine, dans le premier et le second ordre de diffraction. Pour le 3 ordre, seuls apparaissent les raies et Exemple plus...


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Product Details
  • ISBN-13: 9781159925284
  • Publisher: Books LLC, Wiki Series
  • Publisher Imprint: Books LLC, Wiki Series
  • Height: 246 mm
  • No of Pages: 34
  • Spine Width: 2 mm
  • Weight: 82 gr
  • ISBN-10: 1159925283
  • Publisher Date: 12 Oct 2012
  • Binding: Paperback
  • Language: French
  • Returnable: N
  • Sub Title: Rayon X, Spectrometrie de Fluorescence X, Diffractometrie de Rayons X, Tube a Rayons X, Charles Vaillant, Wilhelm Ront
  • Width: 189 mm


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