Advances in x-ray techniques, including x-ray optics, have paved the way to obtain challenging results in several research fields thanks to the improvement in terms of spatial resolution. This is particularly true for x-ray fluorescence (XRF), where the combination of conventional x-ray sources with polycapillary optics has permitted to have high flux and high focused beams. However, XRF spectroscopy applied to archeological samples at a lab scale is mainly dedicated to qualitative studies. At the same time, quantitative analysis still remains a strong hurdle mainly due to important matrix effects that affect the signal related to the chemical components under evaluation. In this respect the adoption of x-ray optics on both the source and the detector represents a way to improve the signal to noise ratio, necessary for quantitative analysis. At LNF XLab Frascati the expertise, gained on x-ray techniques and on polycapillary lenses, has allowed researchers to carry out advanced μXRF studies. RXR (Rainbow X-ray), is the experimental station dedicated to 2D/3D XRF micro-imaging and TXRF analysis, being equipped with 2 detectors of different energy efficiency (covering a full spectrum from 800 eV to 25 keV) and working in confocal mode with the source coupled with a full-lens and both the detectors combined with dedicated half-lenses. This report aims in depicting the RXR potentialities through the results obtained in 2 case studies dedicated to carry out a semi-quantitative analysis of 2 different artifacts (an ancient book, a Buddhist scroll) by μXRF characterization.

Guglielmotti, V., Hampai, D., Micheli, L., Mazzuca, C., Redi, M., Gasbarri, E., et al. (2020). Application of polycapillary optics to x-ray fluorescence for advanced spectroscopy and microscopy studies. In Advances in X-Ray/EUV optics and components 15. (pp.114910-114920). International Society for Optics and Photonics [10.1117/12.2568413].

Application of polycapillary optics to x-ray fluorescence for advanced spectroscopy and microscopy studies

Micheli, L;Mazzuca, C;
2020-08-21

Abstract

Advances in x-ray techniques, including x-ray optics, have paved the way to obtain challenging results in several research fields thanks to the improvement in terms of spatial resolution. This is particularly true for x-ray fluorescence (XRF), where the combination of conventional x-ray sources with polycapillary optics has permitted to have high flux and high focused beams. However, XRF spectroscopy applied to archeological samples at a lab scale is mainly dedicated to qualitative studies. At the same time, quantitative analysis still remains a strong hurdle mainly due to important matrix effects that affect the signal related to the chemical components under evaluation. In this respect the adoption of x-ray optics on both the source and the detector represents a way to improve the signal to noise ratio, necessary for quantitative analysis. At LNF XLab Frascati the expertise, gained on x-ray techniques and on polycapillary lenses, has allowed researchers to carry out advanced μXRF studies. RXR (Rainbow X-ray), is the experimental station dedicated to 2D/3D XRF micro-imaging and TXRF analysis, being equipped with 2 detectors of different energy efficiency (covering a full spectrum from 800 eV to 25 keV) and working in confocal mode with the source coupled with a full-lens and both the detectors combined with dedicated half-lenses. This report aims in depicting the RXR potentialities through the results obtained in 2 case studies dedicated to carry out a semi-quantitative analysis of 2 different artifacts (an ancient book, a Buddhist scroll) by μXRF characterization.
Advances in X-Ray/EUV optics and components 15.: SPIE optical engineering + applications
2020
International Society for optical engineering
Rilevanza internazionale
Settore CHIM/01
Settore CHIM/02
Settore FIS/01
English
2D XRF mapping; Archaeometry; micro x-ray fluorescence; micro-spectrometry; polycapillary lenses; semi-quantitative analysis
The authors want to acknowledge the Casanatense Library and the Pigorini Museum, in particular to the “Fondazione Ragusa”, for the cooperation with the XlabF at INFN-LNF that gave the access to the study of the artifacts. One of the authors (SBD) acknowledges the Competitiveness Program of NRNU MEPhI.
Intervento a convegno
Guglielmotti, V., Hampai, D., Micheli, L., Mazzuca, C., Redi, M., Gasbarri, E., et al. (2020). Application of polycapillary optics to x-ray fluorescence for advanced spectroscopy and microscopy studies. In Advances in X-Ray/EUV optics and components 15. (pp.114910-114920). International Society for Optics and Photonics [10.1117/12.2568413].
Guglielmotti, V; Hampai, D; Micheli, L; Mazzuca, C; Redi, M; Gasbarri, E; Dabagov, S
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/255783
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