PSI - Issue 47

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

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Procedia Structural Integrity 47 (2023) 119–124

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Abstract Crystal scintillators are employed in a variety of applications in order to convert X-rays or gamma rays to visible radiation. The performance of a scintillator is strongly dependent on several factors such as pressure, temperature and radiation fluxes. In this study, the absolute luminescence efficiency (AE) dependence of LaCl 3 :Ce scintillator with temperature was investigated. A single cubic-shaped crystal with dimensions of 10 × 10 × 10 mm 3 was irradiated by X-rays (90 kVp, 63 mAs). The measurements were obtained with the temperature ranging from 29 to 162 o C. As temperature increases, the luminescence efficiency, in the range 29 84 o C, decreases due to thermal quenching, with the AE values ranging from 33.14 to 17.96 E.U. (efficiency units-E.U.). From 84 to 162 o C, the luminescence efficiency is little affected by the increase of the temperature, as the AE values remain almost constant (17.96 to 17.88 E.U.). From the measured luminescence efficiency values, we may conclude that LaCl 3 :Ce scintillator could be considered as a suitable choice for applications at harsh environments, since the efficiency of the crystal exhibited a 47% decrease from 29 o C temperature to the maximum examined. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Abstract Crystal scintillators are employed in a variety of applications in order to convert X-rays or gamma rays to visible radiation. The performance of a scintillator is strongly dependent on several factors such as pressure, temperature and radiation fluxes. In this study, the absolute luminescence efficiency (AE) dependence of LaCl 3 :Ce scintillator with temperature was investigated. A single cubic-shaped crystal with dimensions of 10 × 10 × 10 mm 3 was irradiated by X-rays (90 kVp, 63 mAs). The measurements were obtained with the temperature ranging from 29 to 162 o C. As temperature increases, the luminescence efficiency, in the range 29 84 o C, decreases due to thermal quenching, with the AE values ranging from 33.14 to 17.96 E.U. (efficiency units-E.U.). From 84 to 162 o C, the luminescence efficiency is little affected by the increase of the temperature, as the AE values remain almost constant (17.96 to 17.88 E.U.). From the measured luminescence efficiency values, we may conclude that LaCl 3 :Ce scintillator could be considered as a suitable choice for applications at harsh environments, since the efficiency of the crystal exhibited a 47% decrease from 29 o C temperature to the maximum examined. a University of West Attica, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, Department of Biomedical Engineering, Athens 12210, Greece b University of West Attica, Department of Biomedical Sciences, Athens 12210, Greece a University of West Attica, Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, Department of Biomedical Engineering, Athens 12210, Greece b University of West Attica, Department of Biomedical Sciences, Athens 12210, Greece 27th International Conference on Fracture and Structural Integrity (IGF27) Temperature Dependence of the Luminescence Output of LaCl 3 :Ce Single Crystal Scintillator Stavros Tseremoglou a,* , Vasileios Ntoupis a , Dionysios Linardatos a , Ioannis Valais a , Christos Michail a , Athanasios Bakas b , Konstantinos Ninos b , Eleftherios Lavdas b , Ioannis Kandarakis a , George Fountos a and Nektarios Kalyvas a 27th International Conference on Fracture and Structural Integrity (IGF27) Temperature Dependence of the Luminescence Output of LaCl 3 :Ce Single Crystal Scintillator Stavros Tseremoglou a,* , Vasileios Ntoupis a , Dionysios Linardatos a , Ioannis Valais a , Christos Michail a , Athanasios Bakas b , Konstantinos Ninos b , Eleftherios Lavdas b , Ioannis Kandarakis a , George Fountos a and Nektarios Kalyvas a

Peer-review under responsibility of the IGF27 chairpersons Keywords: Scintillators; crystals; temperature dependence; LaCl 3 (Ce) Peer-review under responsibility of the IGF27 chairpersons Keywords: Scintillators; crystals; temperature dependence; LaCl 3 (Ce)

* Corresponding author. Tel.: +30-210-7752-919 E-mail address: stseremoglou@uniwa.gr * Corresponding author. Tel.: +30-210-7752-919 E-mail address: stseremoglou@uniwa.gr

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons 2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons 10.1016/j.prostr.2023.07.002