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|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.
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|
|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.|
|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|
|Appears in Collections:||Δημοσιεύσεις|
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