The new external ion beam analysis setup at the Demokritos Tandem accelerator and first applications in cultural heritage

Sokaras, Dimosthenis; Bistekos, Euthimios; Georgiou, Lambros; Salomon, J.; Bogovać, M.; Aloupi-Siotis, Eleni; Paschalis, Vasileios S.; Aslani, Ioanna; Karabagia, Sofia; Lagoyannis, A.; Harissopulos, S.; Kantarelou, V.; Karydas, A. G.

doi:10.1016/j.nimb.2011.01.002

Cited by 15 publications

(7 citation statements)

References 32 publications

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“…For the confocal reconstruction, the density has to be known as well. According to previous calculations based on the mole % composition for the ceramic body and the BG and the densities for amorphous silica glass, amorphous alumina, potassium, and Fe(II) oxides, the estimated values are 1.8 and 2.3 g/cm 3 for the bulk and the black glaze, respectively …”

Section: Quantificationmentioning

confidence: 87%

“…According to previous calculations based on the mole % composition for the ceramic body and the BG and the densities for amorphous silica glass, amorphous alumina, potassium, and Fe(II) oxides, the estimated values are 1.8 and 2.3 g/cm 3 for the bulk and the black glaze, respectively. 33 The differences in the determined integrated intensity are exactly what is expected due to the different self-absorption effects in a homogeneous sample. Due to the limited depth, confocal micro-XANES spectra exhibit less self-absorption effects.…”

Section: ■ Quantificationmentioning

confidence: 99%

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Confocal XANES and the Attic Black Glaze: The Three-Stage Firing Process through Modern Reproduction

et al. 2014

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The decorated black- and red-figured Athenian vases (sixth and fifth century BC) and the plain black-glazed ware represent a milestone in our material culture due to their aesthetic and technological value; the Attic black glaze is of particular interest since it is a highly resistant potash-alumino-silicate glass, colored by magnetite nanocrystals (<200 nm). This study presents a new methodological approach for correlating the iron oxidation state in the black glaze layer with the manufacturing process by means of conventional and confocal X-ray absorption near edge spectroscopy (XANES). The enhanced surface sensitivity of confocal XANES is combined with conventional XANES resulting in higher counting rates to reliably evaluate the iron oxidation state (Fe(3+)/ΣFe) of the surface layer. A detailed description of the new evaluation procedure is presented. The three-stage firing process was retraced by correlating selected attic black-glazed (BG) specimens from different periods (Archaic, Classical, Hellenistic) with laboratory reproductions. The modern BG specimens serving as reference samples were produced by following the three-stage firing process (i.e., under oxidizing-reducing-oxidizing (ORO) conditions) at different top temperatures, using clay suspensions of different particle size produced with treatment of raw illitic clays from Attica.

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Section: Quantificationmentioning

confidence: 87%

Section: ■ Quantificationmentioning

confidence: 99%

Confocal XANES and the Attic Black Glaze: The Three-Stage Firing Process through Modern Reproduction

et al. 2014

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“…With this solution, the count rate can be roughly the same for low-and high-energy X-ray detectors. Two-detector PIXE setup has become very popular; see, for example, [65][66][67][68][69][70][71][72][73][74][75]. This is the adopted solution also at INFN-LABEC, within the INFN-CHNet network.…”

Section: X-ray Detectors-pixementioning

confidence: 99%

Detectors and Cultural Heritage: The INFN-CHNet Experience

et al. 2021

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Detectors are a key feature of the contemporary scientific approach to cultural heritage (CH), both for diagnostics and conservation. INFN-CHNet is the network of the Italian National Institute of Nuclear Physics that develops and applies new instrumentation for the study of CH. This process results in both optimized traditional state-of-the-art and highly innovative detection setups for spectrometric techniques. Examples of the former are X-rays, gamma-rays, visible-light and particles spectrometers tailored for CH applications, with optimized performances, reliability, weight, transportability, cost, absorbed power, and complementarity with other techniques. Regarding the latter, examples are ARDESIA, the array of detectors at the DAΦNE-Light facility, the MAXRS detection setup at the Riken-RAL muon beamline and the imaging facilities at the LENA Laboratory. Paths for next-generation instruments have been suggested, as in the case of the X-ray Superconductive Detectors and X-ray Microcalorimeter Spectrometers, allowing astonishing improvement in energy resolution. Many issues in CH can now be addressed thanks to scientific techniques exploiting the existing detectors, while many others are still to be addressed and require the development of new approaches and detectors.

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“…The actinide targets were examined as far as their thickness and homogeneity are concerned via the Rutherford Backscattering Spectrometry technique (RBS) at the external ion-beam setup of the 5.5 MV HV TN-11 Tandem accelerator of the Institute of Nuclear Physics at NCSR "Demokritos" [3]. The targets were mounted on a holder specially designed to provide the possibility to move perpendicularly with respect to the beam axis with an accuracy of 0.01 mm.…”

Section: Thickness and Homogeneity Measurementsmentioning

confidence: 99%

Characterization of actinide targets for fission cross section measurements

Diakaki¹,

Vlastou²,

Kokkoris³

et al. 2012

hnps

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In this work the characterization of thin actinide targets ( 237Np, 238U, 235U), man- ufactured for measurements of fission cross section, will be presented. The determi- nation of the mass of the actinide content of each target has been performed via alpha spectrometry, utilizing two SSB detectors, with 50mm2 and 3000mm2 active surface, in order to combine good resolution and good statistics respectively and obtain a smaller error in the final mass result. The impurities of the targets were quantitatively estimated with the same technique. The homogeneity of the samples was examined with two independent methods. Firstly, RBS measurements were per- formed using a proton beam of 2 MeV, provided by the 5.5 MV Tandem Van de Graaff accelerator of the N.C.S.R. ”Demokritos”. The thickness of each target was quantitatively estimated at various points. Secondly, CR-39 plastic track detectors were used to measure the alpha tracks from the surface of the targets and provide an image of the activity of the surface.

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The new external ion beam analysis setup at the Demokritos Tandem accelerator and first applications in cultural heritage

Cited by 15 publications

References 32 publications

Confocal XANES and the Attic Black Glaze: The Three-Stage Firing Process through Modern Reproduction

Confocal XANES and the Attic Black Glaze: The Three-Stage Firing Process through Modern Reproduction

Detectors and Cultural Heritage: The INFN-CHNet Experience

Characterization of actinide targets for fission cross section measurements

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