Double Dispersive X-Ray Fluorescence (D 2 XRF) based on an Energy Dispersive pnCCD detector for the detection of platinum in gold - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Microchemical Journal Année : 2016

Double Dispersive X-Ray Fluorescence (D 2 XRF) based on an Energy Dispersive pnCCD detector for the detection of platinum in gold

Résumé

"With the aim of improving limits of detection (LOD) of trace elements in a matrix with adjacent fluorescence energies, a simple double dispersive X-ray fluorescence detection system (D2XRF) was constructed to operate at the beamlines BAMline and the mySpot @ BESSY II. This system is based on the combination of a crystal analyzer with an energy resolving single photon counting pnCCD. Without further collimators, the efficient suppression of the background by the pnCCD and the good energy resolution of the crystal results in improved LOD. In first order reflections, an energy resolution of 13 eV for Cu Kα was reached, and an energy range of 1 keV was covered in one shot.This new system was applied to the detection of platinum (Pt) in gold leaves with a LOD of 0.9 mg/kg, which is the lowest attained by totally non-destructive methods nowadays. The presence of Pt in gilded objects from Abydos and Byzantine mosaics provides vital information, as it indicates the alluvial origin of the gold for these examples." (source éditeur)
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Dates et versions

hal-01880302 , version 1 (24-09-2018)

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Martin Radtke, Günter Buzanich, Ana Guilherme, Uwe Reinholz, Heinrich Riesemeier, et al.. Double Dispersive X-Ray Fluorescence (D 2 XRF) based on an Energy Dispersive pnCCD detector for the detection of platinum in gold. Microchemical Journal, 2016, 125, pp.56-61. ⟨10.1016/j.microc.2015.10.039⟩. ⟨hal-01880302⟩
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