Browsing by Author "Legnini, DG"

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    The complementarity of PIXE and synchrotron induced X-ray methods for the characterisation of combustion sources contributing to urban air pollution
    (Elsevier, 2002-04) Cohen, DD; Siegele, R; Stelcer, E; Garton, DB; Stampfl, APJ; Cai, Z; Ilinski, P; Rodrigues, W; Legnini, DG; Yun, W; Lai, B
    Current knowledge of fine-particle airborne pollution concentrations and constituents with diameters below 2.5 μm (PM2.5) is limited. Sources are both natural and man-made. Here we describe two types of experiments performed using the advanced photon source facility at Chicago, and compare the results with PIXE analysis on the same fine particle filters. These are firstly broad beam (2 mm) studies with tuned synchrotron beam energies to help resolve over-lapping X-rays, and secondly highly focused X-ray beam studies (0.2 μm) of individual fine particles from airborne pollution combustion sources. © 2002 Elsevier Science B.V.
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    Synchrotron x-ray microprobe analysis of radioactive trace elements in mineral sands
    (Elsevier Science B. V., 2001-07-21) Garrett, RF; Blagojevic, N; Cai, ZH; Legnini, DG; Rodrigues, W; Stampfl, APJ
    Elemental distribution maps and XANES spectra of radioactive trace elements in zircon and ilmenite mineral grains were measured using a synchrotron X-ray microprobe. The results confirm the utility of the technique for the study of trace elements in minerals, provide chemical information important for designing processes for their removal from ores, and are direct confirmation for a previously inferred model of thorium incorporation into ilmenite during weathering. © 2001 Elsevier Science B.V.