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6950207 
Journal Article 
Multilayered samples reconstructed by measuring K-alpha/K-beta or L-alpha/L-beta X-ray intensity ratios by EDXRF 
Cesareo, R; de Assis, JT; Roldan, C; Bustamante, AD; Brunetti, A; Schiavon, N; , 
2013 
1 
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
ISSN: 0168-583X 
ELSEVIER SCIENCE BV 
AMSTERDAM 
312 
15-22 
WOS:000324657500003 
In this paper a general method based on energy-dispersive X-ray fluorescence (EDXRF) analysis has been tested to assess its possible use as a tool to reconstruct the structure and determine the thickness of two and/or multi-layered materials. The method utilizes the X-ray intensity ratios of K-alpha/K-beta or L-alpha/L-beta peaks (or the ratio of these peaks) for selected elements present in multi-layered objects of various materials (Au alloys, gilded Cu, gilded Ag, gilded Pb, Ag-Au Tumbaga, stone surfaces with protective treatments, Zn or Nickel plating on metals). Results show that, in the case of multi-layered samples, a correct calculation of the peak ratio (K-alpha/K-beta and/or L-alpha/L-beta) of relevant elements from energy-dispersive X-ray fluorescence spectra, can provide important information in assessing the exact location of each layer and for calculating its thickness. The methodological approach shown may have important applications not only in materials science but also when dealing with the conservation and restoration of multi-layered cultural heritage objects where the use of a Non-Destructive techniques to determine slight chemical and thickness variations in the layered structure is often of paramount importance to achieve the best results. (c) 2013 Elsevier B.V. All rights reserved. 
Energy-dispersive X-ray fluorescence; K-alpha/K-beta and L-alpha/L-beta - ratios; Pigment layers; Gilded alloys; Silvered alloys; Tools