Energy-dependent scintillation intensity of fluorozirconate-based glass-ceramic x-ray detectors

Stefan Schweizer; Bastian Henke; Stephanie Köneke; Jacqueline A. Johnson; Gang Chen; John Woodford

doi:10.1117/12.653769

2 March 2006 Energy-dependent scintillation intensity of fluorozirconate-based glass-ceramic x-ray detectors

Stefan Schweizer, Bastian Henke, Stephanie Köneke, Jacqueline A. Johnson, Gang Chen, John Woodford

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 61422Y (2006) https://doi.org/10.1117/12.653769
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

We investigated the energy-dependent scintillation intensity of Eu-doped fluorozirconate glass-ceramic x-ray detectors in the energy range from 6 to 20 keV. The experiments were performed at the Advanced Photon Source, Argonne National Laboratory. The glass ceramics are based on Eu-doped fluorozirconate glasses, which were additionally doped with chlorine to initiate the nucleation of BaCl₂ nanocrystals therein. The x-ray excited scintillation is mainly due to the 5d-4f transition of Eu²⁺ embedded in the BaCl₂ nanocrystals; Eu²⁺ in the glass does not luminesce. Upon appropriate annealing the nanocrystals grow and undergo a phase transition from a hexagonal to an orthorhombic phase of BaCl₂. The scintillation intensity is investigated as a function of the x-ray energy as well as of the particle size and structure of the embedded nanoparticles. The scintillation intensity versus x-ray energy dependence shows that the intensity is inversely proportional to the photoelectric absorption of the material, i.e. the more photoelectric absorption the less scintillation.

Citation Download Citation

Stefan Schweizer, Bastian Henke, Stephanie Köneke, Jacqueline A. Johnson, Gang Chen, and John Woodford "Energy-dependent scintillation intensity of fluorozirconate-based glass-ceramic x-ray detectors", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61422Y (2 March 2006); https://doi.org/10.1117/12.653769

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