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Complex analysis of the “Cannon of Giurgiu” by Computerized Tomography with 192-Ir

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Costel Rizescu, Calin Besliu, Alexandru Jipa, Ilie Neacsu

Editorial: Journal of Archaeological Science, Volume 29, Issue 3, p.267 – 275, 2002.

Rezumat:

The historical piece of artillery „Cannon of Giurgiu” is investigated by computed tomography and X-ray diffraction methods. 30 cross sections transversal to the cannon axis, spaced at 5-20 mm, are analysed by dual-energy CT method with 192-Ir radioisotope. Samples of corrosion material from the cannon pipe are tested by X-ray diffraction method. Numerous casting defects, large internal defects grown during cannon use, as well as severe corrosion regions have been detected. Structural analysis provides estimations of local material density and effective atomic number, leading to the identification of three domains in the cannon internal structure (bronze basic material, intermediate material and corrosion material). The degrading process is deep, with thickness of the corrosion layer ranging between 3.5 mm and 10 mm. These results determine the choice of appropiate restoration and conservation procedures.

Cuvinte cheie: Tomography, Gamma-ray, Dual-energy CT method, 192-Iridium, Cannon of Giurgiu