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Title: Light emission efficiency of Gd2O2S:eu (GOS:Eu) powder screens under X-ray mammography conditions
Authors: Μιχαήλ, Χρήστος Μ.
Βαλαής, Ιωάννης Γ.
Τουτουντζής, Ανδριανός Ε.
Καλύβας, Νεκτάριος Ι.
Φούντος, Γεώργιος Π.
Contributors: Ντάβιντ, Στράτος Λ.
Κανδαράκης, Ιωάννης Σ.
Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: X-ray detection;X-ray imaging;Ανίχνευση ακτίνων Χ;Απεικόνιση με ακτίνες Χ
Subjects: Medicine
Issue Date: 19-Jan-2015
Publisher: IEEE
Abstract: The aim of this study was to examine Gd2O2S:Eu (also known as GOS:Eu) powder scintillator under X-ray mammography imaging conditions. For this purpose, three scintillator screens with coating thicknesses of 33.1, 46.4 and 63.1 mg/cm2 were prepared in our laboratory by sedimentation of Gd2O2S:Eu powder. Light emission efficiency and optical emission spectra of the screens were measured under X-ray excitation using X-ray tube voltages (22-49 kVp) employed in mammography. Spectral compatibility with various optical photon detectors (photodiodes, photocathodes, charge coupled devices, films) and intrinsic conversion efficiency value (0.12) were determined by using emission spectrum data. In addition, parameters related to X-ray detection and energy absorption efficiency were calculated. Gd2O2S:Eu showed peak emission in the wavelength range 620-630 nm. The 63.1 mg/cm2 phosphor screen appeared with the maximum light emission efficiency. Due to its reddish emission spectrum, Gd2O2S:Eu showed excellent compatibility with the sensitivity of many currently used photodetectors and could be considered for application in X-ray imaging especially in various digital detectors.
Language: English
Citation: Michail, C., Valais, I., Toutountzis, A., Kalyvas, N., Fountos, G., et al. (January 2009). Light emission efficiency of Gd2O2S:eu (GOS:Eu) powder screens under X-ray mammography conditions. Transactions on Nuclear Science. 55(6). pp. 3703 - 3709. IEEE
Journal: Transactions on Nuclear Science
Type of Journal: With a review process (peer review)
Access scheme: Embargo
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
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