Processing of transparent polycrystalline AlON [electronic resource] : Ce<sup>3+</sup> scintillators
- Washington, D.C. : United States. National Nuclear Security Administration, 2015. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 424-430 : digital, PDF file
- Additional Creators:
- Sandia National Laboratories, United States. National Nuclear Security Administration, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- A new polycrystalline ceramic scintillator is reported for potential use in radiation detection and medical imaging applications. The goal was to develop cerium-activated aluminum oxynitride (AlON:Ce<sup>3+</sup>) ceramics, which can be produced using ceramic processes in comparison to the high-cost, low-yield single-crystal growth technique. A phase pure AlON:Ce<sup>3+</sup> powder with cubic symmetry was successfully synthesized at high temperature under a reducing atmosphere to convert Ce<sup>4+</sup> to Ce<sup>3+</sup> in the solid solution. We explored two different activator concentrations (0.5 and 1.0 mol%). Fully dense and transparent AlON:Ce<sup>3+</sup> ceramics were produced by a liquid-phase-assisted pressureless sintering. The crystal field splitting around the Ce<sup>3+</sup> activator in the AlON was comparable to the splitting induced by Br− and the Cl− ligands, which produced an emission spectrum perfectly matching the maximum quantum efficiency range of the photomultiplier tube for radiation detection. Both optical excitation and radiation ionizations in AlON:Ce<sup>3+</sup> were demonstrated. Lastly, challenges and mechanisms related to the radioluminescence efficiency are discussed.
- Published through SciTech Connect., 10/23/2015., "sand--2016-1338j", "619338", Journal of the American Ceramic Society 99 2 ISSN 0002-7820 AM, and Ching -Fong Chen; Pin Yang; Graham King; Eric L. Tegtmeier.
- Funding Information:
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