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Title: Investigation of two heavy element scintillators by Monte-Carlo methods
Authors: Κωνσταντινίδης, Αναστάσιος Χ.
Λιαπαρίνος, Παναγιώτης Φ.
Καλύβας, Νεκτάριος Ι.
Παναγιωτάκης, Γεώργιος Σ.
Κανδαράκης, Ιωάννης Σ.
Item type: Journal article
Keywords: X-ray detectors;Detector modelling and simulations;Ανιχνευτές ακτίνων-Χ;Μοντελοποίηση και προσομοίωση ανιχνευτή
Subjects: Medicine
Issue Date: 19-Jan-2015
Date of availability: 19-Jan-2015
Publisher: IOP Publishing Ltd
Abstract: The aim of this study was to estimate the influence of K-characteristic radiation on the performance of x-ray scintillating screens containing two heavy elements by Monte Carlo methods. K-characteristic radiation is produced within materials of at least one heavy (high atomic number) element. This radiation may result either in spatial resolution degradation or in emission efficiency decrease. The scintillators studied were the following: LYSO (Lu1.8Y0.2SiO5 and LuYSiO5), CsI and YTaO4. All the aforementioned scintillators have two heavy elements, thus the K-characteristic radiation of the high-Z element can produce additional K-characteristic photons on the low-Z element, resulting in further degradation. Scintillator performance was described in terms of the: (a) Probability of generation and reabsorption of a K-characteristic photon (PKR) and (b) Spatial distribution of K-characteristic radiation within the scintillator material. A custom validated Monte Carlo model was used, in order to simulate the transport of K-characteristic radiation within the above scintillator materials. Results showed that, depending on screen thickness (20–100 mg/cm2) and incident photon energy (20–80 keV) the scintillator's emission efficiency may be significantly reduced.
Description: Part of 4th International Conference on Imaging Technologies in Biomedical Sciences
Language: English
Citation: Konstantinidis, A., Liaparinos, P., Kalivas, N., Panayiotakis, G. and Kandarakis, I. (May 2009). Investigation of two heavy element scintillators by Monte-Carlo methods. Journal of Instrumentation. 4(5). pp. 1-5. IOP Publishing Ltd. Available from:
Journal: Journal of Instrumentation
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
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