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Mikael Elfman

Researcher

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STIM evaluation in GeoPIXE to complement the quantitative dynamic analysis

Author

  • Jan Pallon
  • C. Ryan
  • Natalia Arteaga
  • Mikael Elfman
  • Per Kristiansson
  • Erik Fors
  • Christer Nilsson

Summary, in English

The GeoPIXE software for quantitative PIXE trace element imaging and analysis is a well established package for evaluation of characteristic X-ray data for both PIXE and SXRF. For the case of microbeam applications on semi-thick samples knowledge of the local areal density distribution is important for precise quantification. A technique is reported to achieve this using the measurement of beam particle energy loss as it traverses the sample, as in scanning transmission ion microscopy (STIM). New functionality is added to the GeoPIXE code through integration of routines for STIM sorting of event-by-event data to create elemental maps of the mean energy after traversing the sample. Integration of stopping powers for a given sample matrix then permits the measured energy loss to be related to the local areal density. In a further step, this information is used for X-ray absorption corrections made directly to the PIXE analysis results. As a complement, user-written plugins operating on single STIM spectra have been used to compare the estimated areal density from chosen spots with the corresponding values calculated with the new GeoPIXE routines. The additions made to the code allow a more precise quantification to be done on inhomogeneous, semi-thick samples. (C) 2009 Elsevier B.V. All rights reserved.

Department/s

  • Nuclear physics

Publishing year

2009

Language

English

Pages

2080-2084

Publication/Series

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Volume

267

Issue

12-13

Document type

Conference paper

Publisher

Elsevier

Topic

  • Subatomic Physics

Keywords

  • STIM
  • Quantification
  • PIXE
  • Semi-thick samples

Conference name

11th International Conference on Nuclear Microprobe Technology and Applications/3rd International Workshop on Proton Beam Writing

Conference date

2008-07-20 - 2008-07-25

Conference place

Debrecen, Hungary

Status

Published

ISBN/ISSN/Other

  • ISSN: 0168-583X