A portable micro-X-ray fluorescence spectrometer with polycapillary optics and vacuum chamber for archaeometric and other applications

Buzanich, Günter; Wobrauschek, P.; Streli, Christina; Markowicz, A.; Węgrzynek, D.; Chinea-Cano, E.; Bamford, S.

doi:10.1016/j.sab.2007.08.003

Cited by 39 publications

(21 citation statements)

References 3 publications

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“…Furthermore, the samples are a good choice as nondestructive measurements are very important when dealing with the analysis of objects from cultural heritage. 5,[16][17][18][19] All samples were measured using the Mo x-ray tube with the maximum parameters of 50 kV and 1 mA. Acquisition was 50 s real-time for each point.…”

Section: Depth Profilingmentioning

confidence: 99%

Confocal micro-x-ray fluorescence spectrometer for light element analysis

Smolek

Pemmer²,

Zoeger³

et al. 2012

Review of Scientific Instruments

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An existing micro-x-ray fluorescence (micro-XRF) spectrometer designed for light element analysis (6 ≤ Z ≤ 14) has been extended to confocal geometry: a second polycapillary x-ray optic has been introduced in front of the energy dispersive x-ray detector. New piezo positioners for optimum alignment of both optics have been installed inside the vacuum chamber. The spectrometer offers now the possibility of true 3D elemental analysis in the micrometer regime. Depth resolution varies between 100 μm at 1 keV fluorescence energy (Na-Kα) and 30 μm for 17.5 keV (Mo). To further extend analytical capabilities a second x-ray tube with a Rh anode has been acquired to supplement to existing Mo anode tube. Lower limits of detection have been determined to be in the ppm region for confocal geometry. The spectrometer has been characterized and tested using different samples. Furthermore, results have been compared with SR micro-XRF to show the capabilities and limitations of this spectrometer.

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Section: Depth Profilingmentioning

confidence: 99%

Confocal micro-x-ray fluorescence spectrometer for light element analysis

Smolek

Pemmer²,

Zoeger³

et al. 2012

Review of Scientific Instruments

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“…These allow for in situ and rapid throughput systems [80,81] as well as medical [82], and portable monitoring systems [83][84][85]. The smooth beam shape potentially allows for easier analysis.…”

Section: Ray Fluorescence and Spectrometrymentioning

confidence: 99%

Focusing Polycapillary Optics and Their Applications

MacDonald

2010

X-Ray Optics and Instrumentation

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A summary of focusing X ray polycapillary optics is presented including history, theory, modeling, and applications development. The focusing effects of polycapillary optics come from the overlap of the beams from thousands of small hollow glass tubes. Modeling efforts accurately describe optics performance to allow for system development in a wide variety of geometries. The focusing of X ray beams with polycapillary optics yields high gains in intensity and increased spatial resolution for a variety of clinical, lab-based, synchrotron or in situ analysis applications.

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“…By making use of a polycapillary lens to collimate the x-ray beam, a spot size of 90 µm was obtained, ideal to analyse ink. The x-ray generator and detector were coupled to a vacuum chamber [12] in 45 • geometry. All spectra were collected in vacuum, operating conditions of 40 kV, 1 mA and 300 s. Quantification of the elemental content was performed using the compare mode model of WinAxil (Analysis of x-ray spectra by iterative least-squares fitting) software package developed by the International Atomic Energy Agency (IAEA) using three standard reference materials (poplar leaves GBW 07604; bush branches GBW 07603; tea leaves GBW 07605).…”

Section: Methodsmentioning

confidence: 99%

“…[8 -11] Furthermore, technological advances allow such a miniaturisation that portable spectrometers are available to provide quality measurements in situ. [11,12] Thus, documents so valuable or in severe state of conservation can be analysed without leaving the museum or archive. In this work, paper from an Austrian book from 1920 and inks from historical manuscripts were characterised by EDXRF.…”

Section: Introductionmentioning

confidence: 99%

Investigation of historical documents for forensic purposes by x‐ray fluorescence spectrometry

Pessanha

Manso

Guilherme

et al. 2009

Surface & Interface Analysis

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This work shows the suitability of energy dispersive x-ray fluorescence (EDXRF) in the field of forensic document examination. The identification and quantification of the elemental composition of the paper and inks of books and documents can shed some light on its authenticity and authorship. The concentrations of S, Cl, K, Ca, Ti, Co, Mn, Fe, Cu, Zn, Br, Rb, Sr, Ba and Pb were determined in these samples in order to characterise them.In this work, paper sheets of an early 20th century book were analysed in order to distinguish different paper manufacturers. The analysis of two historical documents (18th and 19th centuries) was performed in order to investigate the authenticity of the documents by analysing the ink of the signatures and the corresponding text.

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A portable micro-X-ray fluorescence spectrometer with polycapillary optics and vacuum chamber for archaeometric and other applications

Cited by 39 publications

References 3 publications

Confocal micro-x-ray fluorescence spectrometer for light element analysis

Confocal micro-x-ray fluorescence spectrometer for light element analysis

Focusing Polycapillary Optics and Their Applications

Investigation of historical documents for forensic purposes by x‐ray fluorescence spectrometry

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