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

    Research output: Contribution to journalArticlepeer-review


    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.
    Original languageEnglish
    Pages (from-to)491-496
    Number of pages6
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Issue number3
    Publication statusPublished - 1988


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