Journal article

Nuclear microprobe analysis of U-doped (Bi,Pb)(2)Sr2Ca2Cu3Oy/Ag superconducting tapes

B Rout, J Hendriks, DN Jamieson, R Szymanski, D Milliken, SX Dou

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | ELSEVIER SCIENCE BV | Published : 2002

Abstract

Superconducting (Bi,Pb)2Sr2Ca2Cu3Oy/Ag tapes are doped with uranium compounds to introduce flux pinning defects from neutron-induced fission. The composition and distribution of elements in cross sections of the tapes were probed with a scanned 3 MeV proton microbeam using proton induced X-ray emission (PIXE). Distributions of the constituent elements were found to be heterogeneous on a scale of 10 μm. By combining the PIXE analysis with Rutherford backscattering spectrometry, the stoichiometry of the superconductor within the tape was measured, including oxygen from elastic scattering, revealing a departure from the desired 2223 composition. In one of the tapes, PIXE elemental maps of the A..

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