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Badania starożytnych monet metodą spektroskopii emisyjnej ze wzbudzeniem laserowym

Skrzeczanowski W.

Prace Instytutu Elektrotechniki

2018

Z. 278

91--102

W pracy opisano badania starożytnych monet wykonanych ze stopów srebra, przeprowadzone za pomocą spektroskopii emisyjnej ze wzbudzeniem laserowym. Wyniki prac pozwoliły określić względną zawartość pierwiastków w monetach i skład warstw na różnych głębokościach na przykładzie jednej z monet greckich. Przedstawiono wyniki statystycznej analizy czynnikowej widm LIBS starożytnych monet.

LIBS applications in analysis of chemical composition of selected ancient coins are described in the paper. In the introduction a review of typical physical phenomena present in LIBS experiments is given, problems related to correct interpretation of LIBS emission spectra are shortly discussed. Next part of the paper is devoted to short description of experimental setup and its essential components. In the Chapter 3 works on determination of chemical composition of Greek and Roman coins are presented. Results of analysis of chemical composition of the coins using calibration LIBS approach with the aid of statistical multivariate factorial analysis are shown. For octodrachm a stratigraphy method was applied which revealed a complex structure of superficaial encrustations covering the coin surface. Summary includes author’s opinion on presented results and a short comment on problems related to quantitative LIBS measurements.

Spektrometr Zantedeschiego-Porra – najstarszy zachowany dwuramienny przyrząd do obserwacji widma liniowego

Rodzeń J.

Kwartalnik Historii Nauki i Techniki

2016

R. 61, nr 4

145--163

Until today, in the world collections of historic scientific devices only three complete spectroscopic apparatuses have survived. They were used for line spectrum observation and they date from before 1860, i.e. before Bunsen’s and Kirchhoff’s spectrochemical analysis was aknowledged. The subject of this article concerns inventory item No 348/10383 kept in the Museum of the History of Physics at the Padua University. With probability that equals certainty, the item was identified as spectrometer (spettrometro), constructed in the years 1852-1855 by Porr for Zantedeschi and his physical office at the Padua University. The identification was made on the basis of the following sources: little-known scientific articles of this Italian physicist, Francesco Zantedeschi (1797-1873), unpublished letters of Italian optics specialist and topographer, Ignazio Porro (1801-1875), illustrations of scientific devices, and descriptions from museum catalogues. In the perspective of the early history of optical spectrum apparatuses, Zantedeschi-Porro spectrometer should be considered as the oldest known and preserved two-armed (not with double telescope!) device to observe the line spectrum.