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PIXE analysis of medieval silver coins

Abdelouahed, H. Ben ; Gharbi, F. ; Roumié, M. ; Baccouche, S. ; Romdhane, K. Ben ; Nsouli, B. ; Trabelsi, A.

Materials characterization, 2010-01, Vol.61 (1), p.59-64 [Periódico revisado por pares]

New York, NY: Elsevier Inc

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Título:
PIXE analysis of medieval silver coins
Autor: Abdelouahed, H. Ben ; Gharbi, F. ; Roumié, M. ; Baccouche, S. ; Romdhane, K. Ben ; Nsouli, B. ; Trabelsi, A.
Assuntos: ALUMINIUM ; COPPER ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; GOLD ; GUPIX ; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ; LEAD ; LI-DRIFTED SI DETECTORS ; MATERIALS SCIENCE ; MEV RANGE ; MULTI-ELEMENT ANALYSIS ; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations ; Physics ; PIXE ; PIXE ANALYSIS ; PROTON BEAMS ; QUANTITATIVE CHEMICAL ANALYSIS ; SILVER ; Silver coins ; Solidification ; X RADIATION
É parte de: Materials characterization, 2010-01, Vol.61 (1), p.59-64
Descrição: We applied the proton-induced X-ray emission (PIXE) analytical technique to twenty-eight medieval silver coins, selected from the Tunisian treasury. The purpose is to study the fineness evolution from the beginning of the 7th to the 15th centuries AD. Each silver coin was cleaned with a diluted acid solution and then exposed to a 3 MeV proton beam from a 1.7 MV tandem accelerator. To allow the simultaneous detection of light and heavy elements, a funny aluminum filter was positioned in front of the Si(Li) detector entrance which is placed at 135° to the beam direction. The elements Cu, Pb, and Au were observed in the studied coins along with the major component silver. The concentration of Ag, presumably the main constituent of the coins, varies from 55% to 99%. This significant variation in the concentration of the major constituent reveals the economical difficulties encountered by each dynasty. It could be also attributed to differences in the composition of the silver mines used to strike the coins in different locations. That fineness evolution also reflects the poor quality of the control practices during this medieval period. In order to verify the ability of PIXE analytical method to distinguish between apparently similar coins, we applied hierarchical cluster analysis to our results to classify them into different subgroups of similar elemental composition.
Editor: New York, NY: Elsevier Inc
Idioma: Inglês

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PIXE analysis of medieval silver coins

Abdelouahed, H. Ben ; Gharbi, F. ; Roumié, M. ; Baccouche, S. ; Romdhane, K. Ben ; Nsouli, B. ; Trabelsi, A.

New York, NY: Elsevier Inc

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