Muon Radiography of Ancient Mines: the San Silvestro Archaeo-Mining Park (Campiglia Marittima, Tuscany)

Baccani, G.; Bonechi, L.; Bongi, M.; Brocchini, D.; Casagli, N.; Ciaranfi, R.; Cimmino, L.; Ciulli, V.; D’Alessandro, R.; Del Ventisette, C.; Dini, A.; Gigli, G.; Gonzi, S.; Guideri, S.; Lombardi, L.; Melon, B.; Mori, N.; Nocentini, M.; Noli, P.; Saracino, G.; Viliani, L. Muon Radiography of Ancient Mines: The San Silvestro Archaeo-Mining Park (Campiglia Marittima, Tuscany). Universe 2019, 5, 34. Baccani, G.; Bonechi, L.; Bongi, M.; Brocchini, D.; Casagli, N.; Ciaranfi, R.; Cimmino, L.; Ciulli, V.; D’Alessandro, R.; Del Ventisette, C.; Dini, A.; Gigli, G.; Gonzi, S.; Guideri, S.; Lombardi, L.; Melon, B.; Mori, N.; Nocentini, M.; Noli, P.; Saracino, G.; Viliani, L. Muon Radiography of Ancient Mines: The San Silvestro Archaeo-Mining Park (Campiglia Marittima, Tuscany). Universe 2019, 5, 34.

Abstract

Muon radiography is an imaging technique based on the measurement of the absorption of cosmic ray muons. This technique has recently been used successfully to investigate the presence of unknown cavities in the Bourbon Gallery in Naples and in the Cheops Pyramid at Cairo. The MIMA detector (Muon Imaging for Mining and Archaeology) is a muon tracker prototype for the application of muon radiography in the Archaeological and Mining fields. It is made of three couples of X-Y planes each consisting of 21 scintillator bars with silicon photomultiplier read-out. The detector is compact, robust, easily transportable and has a low power consumption: all of that makes the detector ideal for measurements in narrow and isolated environments. With this detector we have performed a measurement from inside the Temperino mine in the San Silvestro archaeo-mining park in Tuscany. The park includes about 25 km of mining tunnels arranged on several levels that have been excavated since the Etruscan time. The measured muon absorption was compared to the simulated one, obtained from the information provided by 3D laser scanner measurements and the cartographic maps of the mountain above the mine, in order to obtain information on the average density of the rock. This allowed to confirm the presence of a partially accessible exploitation opening and gave some hints on the presence of a high density body within the rock.

Keywords

muon radiography; cosmic rays; tracking detectors; imaging; geophysical prospection; mining

Subject

Physical Sciences, Nuclear and High Energy Physics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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