Szentmiklósi, László and Kis, Zoltán and Tanaka, Manako and Maróti, Boglárka and Hoshino, Masato and Bajnok, Katalin (2021) Revealing hidden features of a Japanese articulated iron lobster via non-destructive local element analysis and 3D imaging. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 36. pp. 2439-2443. ISSN 0267-9477
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Lobster paper v4 REAL.pdf - Accepted Version Download (615kB) | Preview |
Abstract
We present a workflow to non-destructively determine the elemental compositions of internal volumes of interest enclosed within complex-shaped objects, by combining 3D X-ray or neutron imaging, prompt-gamma activation analysis, and advanced Monte Carlo computer simulations. The correction of neutron- and gamma-attenuation effects during element analysis made it possible for the first time to obtain quantitative elemental compositions for such geometries. We applied the method successfully on an articulated iron lobster artifact from Edo period Japan. Using synchrotron X-ray and neutron imaging, we revealed that it has been constructed from numerous hammered plates. Rivets and two kinds of solder were identified based on the contrasts observed in the XCT images; these were selected for local composition analysis. It was found that one soldering material consisted of Cu63Zn37 brass, while the other was a eutectic tin and lead alloy Sn39Pb61. The Zn/Cu adhesive is widely used to bond small areas, whereas Sn/Pb adhesive is used for attaching larger surfaces.
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