Stoichiometric characterisation of Y-Ba-Cu-O superconductors with nuclear probes

Guy Demortier, Franz Bodart, Gaston Moss Deconninck, Guy Terwagne, Zelimir Robert Gabelica, Eric Derouane

    Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs


    Nuclear probes using energetic (MeV range) charged particle irradiation and prompt detection of atomic and nuclear signals are powerful tools to determine quickly and accurately the chemical constituants of YBaCuO superconductors. PIXE in milliprobe geometry is used to determine the actual concentration ratios of Y/Ba and Cu/Ba, with an accuracy of 3% or better. Calculated matrix effects in the detection of characteristic K X-rays allow accurate determinations even when the composition of samples are very different from reference materials. RBS of 2 MeV α-particles is used to certify the homogeneity of the Y-Ba-Cu composition without reference material to a thickness of 250 μg/cm2 under the surface. Deuteron microbeam irradiation leads to simultaneous composition maps of all the elements (YBaCuO) in volume of 5 × 5 × 5 μm using X-rays and protons as identification signals.
    langue originaleAnglais
    Pages (de - à)491-496
    Nombre de pages6
    journalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Numéro de publication3
    Les DOIs
    Etat de la publicationPublié - 1988

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