Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/4181
Title: On the response of GdAlO3:Ce powder scintillators
Authors: Μιχαήλ, Χρήστος Μ.
Καλύβας, Νεκτάριος Ι.
Βαλαής, Ιωάννης Γ.
Δαυίδ, Στράτος Λ.
Σεφέρης, Ιωάννης Ε.
Contributors: Τουτουντζής, Α.
Καραμπότσος, Αθανάσιος Χ.
Λιαπαρίνος, Παναγιώτης Φ.
Φούντος, Γεώργιος Α.
Κανδαράκης, Ιωάννης Σ.
Item type: Journal article
Keywords: Inorganic scintillators;Nuclear counters;Ανόργανοι σπινθηριστές;Ανιχνευτές ακτινοβολίας
Subjects: Medicine
Physics
Ιατρική
Φυσική
Issue Date: 18-Jan-2015
2013
Date of availability: 18-Jan-2015
Publisher: Elsevier Science Ltd
Abstract: The aim of the present study was to investigate the luminescence efficiency (XLE) of gadolinium aluminum perovskite (GdAlO3:Ce) powder scintillator. This powder phosphor, also known as GAP:Ce scintillator, is a non-hygroscopic material, emitting blue light with short decay time. For the purposes of this study, five scintillating screens with coating thicknesses, 14.7, 31.0, 53.7, 67.2 and 121.1 mg/cm2, were prepared in our laboratory from GdAlO3:Ce powder (Phosphor Technology, Ltd) by sedimentation on silica substrates. The light emitted by the phosphors under investigation was evaluated by performing measurements of the absolute luminescence efficiency (AE), X-ray luminescence efficiency and detector quantum gain (DQG) under X-ray exposure conditions with tube voltages ranging from 50 to 140 kV. The quantum detection efficiency (QDE) and energy absorption efficiency (EAE) were also evaluated. The spectral compatibility of GdAlO3:Ce, with various existing optical detectors, was investigated after emission spectra measurements. A theoretical model, describing radiation and light transfer, was used to fit experimental AE data. This has allowed the estimation of optical attenuation coefficients of the scintillator. GdAlO3:Ce exhibited higher QDE and EAE values, compared to aluminium perovskite (YAlO3:Ce) but lower absolute efficiency values. Absolute efficiency was found to increase with increasing X-ray tube voltage, although for values higher than 120 kVp a decrease was observed.
Language: English
Citation: Michail, C., Kalyvas, N., Valais, I., David, S., Seferis, I., et al. (December 2013). On the response of GdAlO3:Ce powder scintillators. Journal of Luminescence. vol. 144. pp. 45–52. Elsevier Science Ltd. Available from: http://www.sciencedirect.com [Accessed 04/07/2013]
Journal: Journal of Luminescence
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/4181
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