Radiation hardness of CsBr:Eu |
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| Authors: | J Zimmermann S Hesse M Fuchs |
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| Institution: | a Materials Science Division, Department of Electronic Materials, Darmstadt University of Technology, 64287 Darmstadt, Germany
b Siemens AG, Medical Solutions, Vacuum Technology, 91058 Erlangen, Germany |
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| Abstract: | In this study,results on the radiation damage of the storage phosphor CsBr:Eu2+ are presented. It is shown that a high X-ray dose causes a significant deterioration of the photostimulated luminescence accompanied by a degradation of the UV-excited Eu2+ fluorescence. Since no related dose-dependent increase of Eu3+ luminescence is observed, the decrease of Eu2+ fluorescence is attributed to an agglomeration of Eu2+ leading to luminescence quenching. The correlated diffusivity of Eu2+ ions is ascribed to the presence of aggregated F-centres such as MEu-centres observed by means of absorption spectroscopy. |
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| Keywords: | 78 55 Fv 78 20 Fy Ha 61 72 Ji |
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