New product
: 1 Centimeters
: 0.9 Centimeters
: 0.7 Centimeters
glass paste
: Roman
: Late 1st ct.-2nd ct. AD
: Cástulo
: Linares, Jaén, Spain
: WGS84
Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND)
Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND) Arquiberlab http://creativecommons.org/licenses/by-nc-nd/3.0/ |
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Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND) Arquiberlab http://creativecommons.org/licenses/by-nc-nd/3.0/ |
Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND) Arquiberlab http://creativecommons.org/licenses/by-nc-nd/3.0/ |
Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND) Arquiberlab http://creativecommons.org/licenses/by-nc-nd/3.0/ |
Archaeometric analysis Physical-chemical analysis Tessera. Composition analysis.
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X-Ray Fluorescence Elemental analysis Non destructive. Surface cleaning. Sample pretreatment is not required. Direct measurement. Energy dispersive X- ray fluorescence (EDXRF) An energy dispersive X-ray microfluorescence spectrometer (M4 Tornado, Bruker) (CICT, University of Jaen). This spectrometer is equipped with a microfocus X-ray tube with an Rh anode, a polycapillary lens for X-ray focussing, and a 30-mm2 energy dispersive detector (SDD). The sample chamber incorporates an XYZ motorized stage for sample positioning. A high resolution microscope is used to position the sample on the desired distance from the polycapillary. To increase the sensitivity of the low Z elements, the sample chamber can be brought under vacuum. For the analysis of the samples, a spot size of 25 μm was chosen at an operating X-ray tube voltage of 50 kV and intensity of 600 μA. The tube current was adapted for each sample in order to optimise the detection of X-rays. |