PSI - Issue 47

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 47 (2023) 80–86

27th International Conference on Fracture and Structural Integrity (IGF27) Light output dependence of CeBr 3 hygroscopic scintillator upon temperature Dionysios Linardatos a , Vasileios Ntoupis a , Stavros Tseremoglou a , Ioannis Valais a , Konstantinos Ninos b , Athanasios Bakas b , Eleftherios Lavdas b , Ioannis Kandarakis a , Nektarios Kalyvas a , George Fountos a , and Christos Michail a ,* 27th International Conference on Fracture and Structural Integrity (IGF27) Light output dependence of CeBr 3 hygroscopic scintillator upon temperature Dionysios Linardatos a , Vasileios Ntoupis a , Stavros Tseremoglou a , Ioannis Valais a , Konstantinos Ninos b , Athanasios Bakas b , Eleftherios Lavdas b , Ioannis Kandarakis a , Nektarios Kalyvas a , George Fountos a , and Christos Michail a ,* 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 Abstract Knowledge of the influence of environmental temperature on the light signal of single-crystals is important upon their integration on detector modules that will be used in harsh-environments. To this aim the performance of a hygroscopic CeBr 3 single crystal was measured and compared with a non-hygroscopic calcium-fluoride (CaF 2 ) single crystal, under similar X-ray irradiation and temperature experimental conditions. A medical CPI series X-ray source (CMP 200 DR) was used and irradiated at a setting of 90kV. The optical photons flux emitted by the crystal was examined in the temperature range from 26 to 155 Celsius. CeBr 3 crystal’s light flux was found to decrease constantly, as the temperature increased (37.94 E.U. at temperature of 26 o C to 9.73 E.U. at 155 o C). The corresponding value of CaF 2 :Eu at 26 o C is 20.71 E.U., showing the superiority of CeBr 3 . The thermal performance of luminescence materials, such as CeBr 3 is useful prior to integration of the detector in modalities ranging from medical-imaging up to harsh environmental applications. © 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 Abstract Knowledge of the influence of environmental temperature on the light signal of single-crystals is important upon their integration on detector modules that will be used in harsh-environments. To this aim the performance of a hygroscopic CeBr 3 single crystal was measured and compared with a non-hygroscopic calcium-fluoride (CaF 2 ) single crystal, under similar X-ray irradiation and temperature experimental conditions. A medical CPI series X-ray source (CMP 200 DR) was used and irradiated at a setting of 90kV. The optical photons flux emitted by the crystal was examined in the temperature range from 26 to 155 Celsius. CeBr 3 crystal’s light flux was found to decrease constantly, as the temperature increased (37.94 E.U. at temperature of 26 o C to 9.73 E.U. at 155 o C). The corresponding value of CaF 2 :Eu at 26 o C is 20.71 E.U., showing the superiority of CeBr 3 . The thermal performance of luminescence materials, such as CeBr 3 is useful prior to integration of the detector in modalities ranging from medical-imaging up to harsh environmental applications. © 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 Keywords: Single-crystals; CeBr 3 ; thermal behavior; extreme environments; medical imaging © 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 Keywords: Single-crystals; CeBr 3 ; thermal behavior; extreme environments; medical imaging

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2452-3216 © 202 3 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 © 202 3 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

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