Improvements to the top-hat filter approach for PIXE background removal

The simple top-hat filter used until now by GUPIX to strip continuum background from PIXE spectra is a compromise, attractive in its simplicity but having limitations. We describe a variable digital filter, whose dimensions increase with channel number, and we introduce a regional filter concept, wh...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2002-04, Vol.189 (1), p.143-147
Main Authors: Maxwell, J.A., Campbell, J.L.
Format: Article
Language:English
Subjects:
Background
Detection limits
PIXE
Spectra
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Summary:The simple top-hat filter used until now by GUPIX to strip continuum background from PIXE spectra is a compromise, attractive in its simplicity but having limitations. We describe a variable digital filter, whose dimensions increase with channel number, and we introduce a regional filter concept, wherein the user has the ability to optimize the filter dimensions in each region of the spectrum. The optimized regional filter confers significant improvement in precision and in detection limits for weak peaks in the higher energy region of the spectrum.
ISSN:0168-583X
1872-9584
DOI:10.1016/S0168-583X(01)01023-0