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Personen: Vincze, Laszlo (Autor) 
Vekemans, Bart (Autor) 
Brenker, Frank E. (Autor) 
Falkenberg, Gerald (Autor) 
Rickers, Karen (Autor) 
Somogyi, Andrea (Autor) 
Kersten, Michael (Autor) 
Adams, Freddy (Autor) 
  
Titel: Three-dimensional trace element analysis by confocal x-ray microfluorescence imaging
  
Quelle: Analytical chemistry. Bd. 76. H. 22. Washington : American Chemical Society. S. 6786 - 6791
Erscheinungsjahr:    2004
ISBN / ISSN: 0003-2700
URL der Originalveröffentlichung doi:10.1021/ac049274l
  
Dokumentart:
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:    Kersten, Michael  In UnivIS suchen 
Einrichtung: Institut für Geowissenschaften
DDC-Sachgruppe:    Geowissenschaften
ID: 15427  Universitätsbibliothek Mainz
Hinweis:
Informationen zu den Nutzungsrechten unserer Inhalte Informationen zu den Nutzungsrechten unserer Inhalte
Abstract: A three-dimensional (3D) variant of scanning micro X-ray fluorescence (XRF) is described and evaluated at the ID 18F instrument of the European Synchrotron Radiation Facility (ESRF). The method is based on confocal excitation/detection using a polycapillary half-lens in front of the energy-dispersive detector. The experimental arrangement represents a significant generalization of regular two-dimensional (2D) scanning micro-XRF and employs a detector half-lens whose focus coincides with that of the focused incoming beam. The detection volume defined by the intersection of the exciting beam and the energy-dependent acceptance of the polycapillary optics is 100350 mum(3). Minimum detection limits are sub-ppm, and sensitivities are comparable with regular scanning XRF. Next to the reduction of in-sample single/multiple scattering, the setup provides the possibility of sample depth scans with an energy-dependent resolution of 10-35mum in the energy range of 3-23 keV and the possibility of performing 3D-XRF analysis by simple XYZ linear scanning. This provides a suitable alternative to X-ray fluorescence tomography. The method is illustrated with results of the analysis of solid inclusions in diamond and fluid inclusions in quartz.
   
  
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