Thermoluminescence authentication and dating at University of Torino A. Lo Giudice1*, S. Allegretti1, D. Angelici1,2,3, J. Corsi1, F. Fantino3, M. Gulmini4, A. Re1 1 Dipartimento di Fisica - Università di Torino and Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Torino 2 Dipartimento di Scienze della Terra - Università di Torino 3 TecnArt S.r.l. – Academic spin-off of the Università di Torino 4 Dipartimento di Chimica - Università di Torino The laboratory and method [1] Abstract Methodology: fine grain 241Am alpha and 90Sr/Y Different approaches are used depending on the uncertainty required in the calculation of the age. Irradiation (for k evaluation): 241Am in vacuum TL measurements γ-ray spectroscopy Authentication Analyzed objects beta sources ANNUAL DOSE Pottery vessels and bowls from Hacilar The collection was donated to the National Archaeological Museum of Firenze in the sixties. It was attributed to the Hacilar settlement (Turkey) in the period 5250 BC – 5000 BC (based on stylistic considerations). TL authentication was performed on two pieces of the collection (<100 mg of sampling). PALEODOSE Chemical preparation: Vieillevigne 2007 [3] Irradiation: 90Sr/Y beta source TL measurements: TL2000 Ipses reader n. 94708 n. 94714 Only equivalent doses were measured (respectively 14 ± 2 Gy and 13,8 ± 1,3 Gy) and compared with results obtained by Aitken et al. 1971 [4]. TL signal is consistent with the historical period attributed Alpha counts: CALPH-Ipses 40K measurement: ICP-OES Gamma ray spectroscopy: HPGe-ORTEC Environmental dosimetry on site: TLD100 ICP-OES Correction for: supralinearity, anomalous fading, radon loss, porosity. Dating C A S E S T U D I E S Monastry in Castelletto Cervo The first document that mentions the existence of the monastery is dated back to 1083. However, archaeologists suggested that the upper forepart of the building may have been added between 1400 AD and 1500 AD. To verify the archaeological hypothesis a TL dating was performed on two bricks. The corresponding year of the last burning (presumably the year of construction) as obtained by means of TL was: TL Signal (a.u.) In the last years, a laboratory for dating [1] and authentication [2] of archaeological finds and historical objects by means of thermoluminescence (TL) technique has been developed at the Physics Department of the University of Torino in collaboration with the Italian Institute for Nuclear Physics (INFN). The facility is part of laboratories within the INFN network CHNet. In many cases, analysis are performed in partnership with TecnArt S.r.l. an academic spin-off of the University of Torino. Temperature (°C) 1400 ± 70 AD In agreement with the archaeological hypothesis. References [1] Tema, E., Fantino, F., Ferrara, E., Lo Giudice, A., Morales, J., Goguitchaichvili, A., Camps, P., Barello, F., Gulmini, M., «Combined archeomagnetic" and thermoluminescence study of a brick kiln excavated at Fontanetto Po (Vercelli, Northern Italy)”. J. Archaeol. Sci., 40 (2013) 2025-2035. [2] Barberis, V., Fantino, F., «Vaso in ceramica a figure rosse con scena erotica: un falso d’autore». Quaderni della Soprintendenza Archeologica del Piemonte, 27 (2012) 367-369. [3] Vieillevigne et al., “Luminescence chronology of the medieval citadel of Termez, Uzbekistan: TL dating of bricks masonrie”, J. Archeol. Sci. 34 (2007) 1402-1416 [4] M.J. Aitken, P-R.S. Moorey, P.J. Ucko, «The authenticity of vessels and figurines in the Hacilar style», Archaeometry 13, 2 (1971) 89-141 *Presenting author: Alessandro Lo Giudice, Physics Department, University of Torino, Via Pietro Giuria 1, 10125, Torino. Tel. +39 0116707378, email: [email protected]