Fachgebiet Analytische Röntgenphysik

4 Items

Recent Submissions
Advanced X-ray analytical methods for the characterization of buried interfaces with relevance for energy conversion devices

Baumann, Jonas (2017)

The efficiency of devices for novel renewable energy sources, like solar cells and thermoelectric generators (TEGs), is strongly increasing since the advent of nanotechnology. Synchrotron radiation-based advanced X-ray fluorescence (XRF) techniques, like grazing emission (GE-) or grazing incidence (GI-) XRF, offer non-destructive and quantitative access to elemental depth profiles in the nanome...

Energiedispersive Mikro-Röntgenfluoreszenzanalyse technischer Mikrostrukturen

Bremekamp, Marcel (2017)

Im Rahmen dieser Arbeit wurde ein FP-basiertes Voxelmodell entwickelt, das die Geometrieeffekte in der μ-EDRFA von Mikrostrukturen berücksichtigt und die Quantifizierung der Fluoreszenzintensitäten ermöglicht, die von diesen Mikrostrukturen emittiert werden. Zu diesem Zwecke wurde eine experimentelle Charakterisierung des Spektrometers bezüglich der spektralen Verteilung der Anregungsstrahlung ...

XAFS spectroscopy by an X-ray tube based spectrometer using a novel type of HOPG mosaic crystal and optimized image processing

Schlesiger, Christopher ; Anklamm, Lars ; Stiel, Holger ; Malzer, Wolfgang ; Kanngießer, Birgit (2015)

This paper presents recent achievements in laboratory based instrumentation for X-ray Absorption Fine Structure Spectroscopy (XAFS). The key component of the spectrometer is a HAPG mosaic crystal, which is employed in the von Hamos geometry. Due to the high efficiency of HAPG a low power micro focus X-ray tube can serve as an X-ray source. Besides a description of the spectrometer, the paper co...

Combined 1D, 2D and 3D micro-XRF techniques for the analysis of illuminated manuscripts

Lachmann, Tim ; van der Snickt, Geert ; Haschke, Michael ; Mantouvalou, Ioanna (2016)

The combination of several micro-XRF analysis modes is presented for the investigation of an illuminated parchment manuscript. With a commercial instrument, conventional micro-XRF spot analysis (0D) and mapping (2D) are performed, yielding detailed lateral elemental information. Depth resolution becomes accessible by mounting an additional polycapillary lens in front of an SDD detector. Quantit...