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Eu2+-doped CsBr photostimulable X-ray storage phosphors — analysis of defect structure by high-frequency EPR

Jakes, Peter and Zimmermann, Jörg and von Seggern, Heinz and Ozarowski, Andrew and van Tol, Johan and Eichel, Rüdiger-A. (2014):
Eu2+-doped CsBr photostimulable X-ray storage phosphors — analysis of defect structure by high-frequency EPR.
In: Functional Materials Letters, 07 (01), World Scientific Publishing Co Pte Ltd, p. 1350073, ISSN 1793-6047,
[Online-Edition: http://dx.doi.org/10.1142/S1793604713500732],
[Article]

Abstract

Eu2+-doped CsBr in form of needle image plates is a promising alternative to the granular Eu2+:BaFBr X-ray storage phosphor with respect to photo-stimulated luminescence, yield and spatial resolution. However, in order to understand the corresponding mechanisms on an atomic scale, the defect structure of Eu2+-doped CsBr photostimulable X-ray storage phosphors has to be analyzed. By means of high-frequency electron paramagnetic resonance (EPR) spectroscopy, three types of defects have been observed — an electrically neutral dimeric defect complex and a neutral trimeric defect complex (FZ-center), as well as acceptor-type F-centers that are generated by the trapping of electrons at initially neutral bromine vacancies.

Item Type: Article
Erschienen: 2014
Creators: Jakes, Peter and Zimmermann, Jörg and von Seggern, Heinz and Ozarowski, Andrew and van Tol, Johan and Eichel, Rüdiger-A.
Title: Eu2+-doped CsBr photostimulable X-ray storage phosphors — analysis of defect structure by high-frequency EPR
Language: English
Abstract:

Eu2+-doped CsBr in form of needle image plates is a promising alternative to the granular Eu2+:BaFBr X-ray storage phosphor with respect to photo-stimulated luminescence, yield and spatial resolution. However, in order to understand the corresponding mechanisms on an atomic scale, the defect structure of Eu2+-doped CsBr photostimulable X-ray storage phosphors has to be analyzed. By means of high-frequency electron paramagnetic resonance (EPR) spectroscopy, three types of defects have been observed — an electrically neutral dimeric defect complex and a neutral trimeric defect complex (FZ-center), as well as acceptor-type F-centers that are generated by the trapping of electrons at initially neutral bromine vacancies.

Journal or Publication Title: Functional Materials Letters
Volume: 07
Number: 01
Publisher: World Scientific Publishing Co Pte Ltd
Uncontrolled Keywords: X-ray storage phosphors, CsBr, defect structure, Eu2+-doping, EPR
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Electronic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 25 Mar 2015 13:04
Official URL: http://dx.doi.org/10.1142/S1793604713500732
Identification Number: doi:10.1142/S1793604713500732
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