XAS, including EXAFS and XANES, is a type of absorption spectroscopy that indicates the features in the X-ray absorption spectra (XAS) of condensed matter due to the photoabsorption cross section for electronic transitions from an atomic core level to final states.
Fields of application
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Cultural heritage
archaeological object and site, architecture, art, decorative arts, demo anthropologic object, film, manuscript, mosaics, musical instrument, other, painting, papyrus, photo, sculpture, textile
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Natural heritage
animal product, botanic collection, fossil, mineral, other, shell, skeleton, taxidermy collection
Materials
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inorganic
glass, stone, metal and metallurgical By-Products, ceramic (clay, mud brick, terracotta, earthenware, stoneware, porcelain), pigment
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organic
animal parts, binding media, glues, wood, paper, textiles, varnishes
TOOLS
PUMA (French for "Photons Utilisés pour les Matériaux Anciens") is a hard X-ray imaging beamline optimized for the scientific communities of the heritage sciences. It has a 2D scanning endstation with an X-ray microbeam of 5 µm (horizontal) x 3 µm (vertical) spot size, allowing users to obtain X-ray fluorescence spectroscopy (XRF), X-ray absorption near-edge...