Characterization of polycapillary lenses to depth profiling analysis by confocal XRF

ROBERTO DANIEL PEREZ; V. SBARATO; H. J. SÁNCHEZ; M. RUBIO

Activity Report/Brazilian Synchrotron Light Laboratory

Laboratório Nacional de Luz Síncrotron (LNLS)

Lugar: Campinas; Año: 2009 vol. 2008 p. 1 - 2

1518-0204

For focusing synchrotron radiation photons, capillaries are all parallel at the entrance and directed toward a common focal spot at the output. In the present work, the characterizations of two similar monolithic polycapillaries were done. They were used to carry out confocal x-ray fluorescence microanalysis. In general, the confocal setup is developed to analyze a small volume of sample. The probing volume is defined by the overlapping of the foci of two lenses, one in the excitation channel and the other in the detection channel. The scanning of the probing volume inside the sample allows the three dimensional analysis. In our confocal ìXRF the incident x-ray beam pass through a polycapillary which focused it into a small volume sample producing x-ray fluorescence emission. A second polycapillary guide the x-ray fluorescence emitted from the probing volume to the detector. As an example, one dimensional scanning over several TEOM environmental filters was done to determine the depth profiling of particulate matter. It is useful to improve the precision of quantitative analysis of environmental filters by conventional XRF.ìXRF the incident x-ray beam pass through a polycapillary which focused it into a small volume sample producing x-ray fluorescence emission. A second polycapillary guide the x-ray fluorescence emitted from the probing volume to the detector. As an example, one dimensional scanning over several TEOM environmental filters was done to determine the depth profiling of particulate matter. It is useful to improve the precision of quantitative analysis of environmental filters by conventional XRF.