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Mössbauer spectroscopy of europium-containing glasses: optical activator study for x-ray image plates

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Abstract

A fluorozirconate glass (ZBLAN) containing BaCl 2 nanocrystals doped with divalent Eu is a promising material for x-ray image plates for medical diagnosis. Since it is known that Eu 2+ readily oxidizes to Eu 3+, which reduces fluorescence efficiency of the image plates, 151Eu Mössbauer spectroscopy was used in this work to monitor the Eu oxidation state of the samples during degradation over time in the presence of ambient humidity. In addition, Mössbauer spectroscopic experiments show that the oxidation state has already changed during the glass melt: The sample made from 5 mol% EuCl 2 contained 78 % EuCl 2 + 22 % EuCl 3 deduced from the relative areas of the absorption lines. The sample made from 2.5 mol% EuCl2 + 2.5 mol% EuCl2 contained 37 % EuCl2 + 63 % EuCl3, i.e. 26 % of the original EuCl 2 was oxidized to EuCl 3.

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Authors and Affiliations

  1. University of Tennessee Space Institute, Tullahoma, TN, 37388, USA

    C. E. Johnson, M. Vu & J. A. Johnson

  2. Northern Illinois University, DeKalb, IL, 60115, USA

    D. E. Brown

  3. Materials Development Inc., Arlington Heights, IL, 60004, USA

    J. K. R. Weber

  4. Centre for Innovation Competence SiLi-nano, Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120, Halle (Saale), Germany

    C. Paßlick

  5. Department of Electrical Engineering, South Westphalia University of Applied Sciences, Lübecker Ring 2, 59494, Soest, Germany

    S. Schweizer

  6. Fraunhofer Institute for Mechanics of Materials IWM, Lübecker Ring 2, 59494, Soest, Germany

    S. Schweizer

Authors
  1. C. E. Johnson
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  2. M. Vu
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  3. J. A. Johnson
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  4. D. E. Brown
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  5. J. K. R. Weber
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  6. C. Paßlick
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  7. S. Schweizer
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Correspondence to J. A. Johnson.

Additional information

Proceedings of the 32nd International Conference on the Applications of the Mössbauer Effect (ICAME 2013) held in Opatija, Croatia, 1–6 September 2013

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Johnson, C.E., Vu, M., Johnson, J.A. et al. Mössbauer spectroscopy of europium-containing glasses: optical activator study for x-ray image plates. Hyperfine Interact 226, 797–801 (2014). https://doi.org/10.1007/s10751-014-1065-0

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  • DOI: https://doi.org/10.1007/s10751-014-1065-0

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