This is a transportable XRD-XRF device that can be operated for field work. It is an integrated system which permits simultaneous X-ray fluorescence and X-ray diffraction analyses to be carried out in the same position. The acquisition of the XRD patterns is done in reflection mode to avoid any contact with the works of art. The prototype instrument allows the characterization of the main materials characteristics: determination of the different phases (chemical composition, crystal structure) and the description of the microstructure (grain size, texture, lattice imperfections, etc.). Validation measurements have been carried out on different types of objects, such as paintings, ceramics and metals. The XRD diagrams obtained with the portable XRF/XRD instrument are comparable in quality with diagrams obtained with conventional laboratory equipment.
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, painting, photo, sculpture, textile
Materials
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inorganic
ceramic (clay/mud brick/terracotta/earthenware/stoneware/porcelain), glass, stone, metal and metallurgical By-Products
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organic
animal parts, binding media, glues, wood, paper, textiles, varnishes
TOOLS
The X-rays source is a copper anode tube, with a maximum 40Wpower:40 kV,1 mA. A collimating polycapillary systemgives a quasi parallel outgoing beam with a very low divergence. The diameter of the beam is about 4 mm. The XRF signal is collected with a SDD X fluorescence detector with a resolution less than 140 eV...