Characterization of Two Japanese Ancient Swords through Neutron Imaging

Abstract

Japanese blades are culturally interesting objects both from the stylistic point of view and because of their fantastic performances.In this work, we present new results, using a non-invasive approach, concerning these peculiar artefacts.Two integer Japanese swords, pertaining to Koto (987-1596) and Shinto (1596-1781) periods have been analysed through neutron-imaging techniques.The experiments have been performed at the ICON beam line, operating at the spallation neutron source SINQ, Paul Scherrer Institut in Switzerland.The reconstruction of projection data into neutron tomographic slices or volumes, allowed us to identify some very peculiar characteristics, related to the forging methods and to the different thermal treatments applied to produce the cutting edge and its unique feature.

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