skip to main content

DOE PAGESDOE PAGES

Title: Processing of transparent polycrystalline AlON:Ce 3+ scintillators

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 3+) 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 3+ powder with cubic symmetry was successfully synthesized at high temperature under a reducing atmosphere to convert Ce 4+ to Ce 3+ in the solid solution. We explored two different activator concentrations (0.5 and 1.0 mol%). Fully dense and transparent AlON:Ce 3+ ceramics were produced by a liquid-phase-assisted pressureless sintering. The crystal field splitting around the Ce 3+ 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 3+ were demonstrated. Lastly, challenges and mechanisms related to the radioluminescence efficiency are discussed.
Authors:
 [1] ;  [2] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2016-1338J
Journal ID: ISSN 0002-7820; 619338
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 99; Journal Issue: 2; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1248612

Chen, Ching -Fong, Yang, Pin, King, Graham, and Tegtmeier, Eric L. Processing of transparent polycrystalline AlON:Ce3+ scintillators. United States: N. p., Web. doi:10.1111/jace.13986.
Chen, Ching -Fong, Yang, Pin, King, Graham, & Tegtmeier, Eric L. Processing of transparent polycrystalline AlON:Ce3+ scintillators. United States. doi:10.1111/jace.13986.
Chen, Ching -Fong, Yang, Pin, King, Graham, and Tegtmeier, Eric L. 2015. "Processing of transparent polycrystalline AlON:Ce3+ scintillators". United States. doi:10.1111/jace.13986. https://www.osti.gov/servlets/purl/1248612.
@article{osti_1248612,
title = {Processing of transparent polycrystalline AlON:Ce3+ scintillators},
author = {Chen, Ching -Fong and Yang, Pin and King, Graham and Tegtmeier, Eric L.},
abstractNote = {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:Ce3+) ceramics, which can be produced using ceramic processes in comparison to the high-cost, low-yield single-crystal growth technique. A phase pure AlON:Ce3+ powder with cubic symmetry was successfully synthesized at high temperature under a reducing atmosphere to convert Ce4+ to Ce3+ in the solid solution. We explored two different activator concentrations (0.5 and 1.0 mol%). Fully dense and transparent AlON:Ce3+ ceramics were produced by a liquid-phase-assisted pressureless sintering. The crystal field splitting around the Ce3+ 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:Ce3+ were demonstrated. Lastly, challenges and mechanisms related to the radioluminescence efficiency are discussed.},
doi = {10.1111/jace.13986},
journal = {Journal of the American Ceramic Society},
number = 2,
volume = 99,
place = {United States},
year = {2015},
month = {10}
}