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Title: Performance of new ceramic scintillators for gamma and x-ray detection

Abstract

Ceramic materials show significant promise for the production of reasonably priced, large-size scintillators. Ceramics have recently received a great deal of attention in the field of materials for laser applications, and the technology for fabricating high-optical-quality polycrystalline ceramics of cubic materials has been well developed. The formation of transparent ceramics of non-cubic materials is, however, much more difficult as a result of birefringence effects in differently oriented grains. Here, we will describe the performance of a few new ceramics developed for the detection of gamma- and x-ray radiation. Results are presented for ceramic analogs of three crystalline materials - cubic Lu2O3, and non-cubic LaBr3, and Lu2SiO5 or LSO (hexagonal, and monoclinic structures, respectively). The impact of various sintering, hot-pressing and post-formation annealing procedures on the light yield, transparency, and other parameters, will be discussed. The study of LaBr3:Ce shows that fairly translucent ceramics of rare-earth halides can be fabricated and they can reach relatively high light yield values. Despite the fact that no evidence for texturing has been found in our LSO:Ce ceramic microstructures, the material demonstrates a surprisingly high level of translucency or transparency. While the scintillation of LSO:Ce ceramic reaches a light yield level of about 86 %more » of that of a good LSO:Ce single crystal, its decay time is even faster, and the long term afterglow is lower than in LSO single crystals.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. ORNL
  2. ALEM Associates, Boston
  3. Radiation Monitoring Devices, Watertown, MA
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
963400
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: SPIE, San Diego, CA, USA, 20070826, 20070830
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; PHOSPHORS; CERAMICS; PERFORMANCE TESTING; GAMMA DETECTION; X-RAY DETECTION; LUTETIUM OXIDES; LANTHANUM BROMIDES; LUTETIUM SILICATES; HEAT TREATMENTS; scintillators; scintillation; ceramics; LSO:Ce; LaBr3:Ce; Lu2O3:Eu; luminescence; afterglow

Citation Formats

Wisniewski, Dariusz J, Boatner, Lynn A, Neal, John S, Jellison Jr, Gerald Earle, Ramey, Joanne Oxendine, North, Andrea L, Wisniewska, Monika, Lempicki, Aleksander, Brecher, Charlie, and Glodo, J. Performance of new ceramic scintillators for gamma and x-ray detection. United States: N. p., 2007. Web.
Wisniewski, Dariusz J, Boatner, Lynn A, Neal, John S, Jellison Jr, Gerald Earle, Ramey, Joanne Oxendine, North, Andrea L, Wisniewska, Monika, Lempicki, Aleksander, Brecher, Charlie, & Glodo, J. Performance of new ceramic scintillators for gamma and x-ray detection. United States.
Wisniewski, Dariusz J, Boatner, Lynn A, Neal, John S, Jellison Jr, Gerald Earle, Ramey, Joanne Oxendine, North, Andrea L, Wisniewska, Monika, Lempicki, Aleksander, Brecher, Charlie, and Glodo, J. Mon . "Performance of new ceramic scintillators for gamma and x-ray detection". United States. doi:.
@article{osti_963400,
title = {Performance of new ceramic scintillators for gamma and x-ray detection},
author = {Wisniewski, Dariusz J and Boatner, Lynn A and Neal, John S and Jellison Jr, Gerald Earle and Ramey, Joanne Oxendine and North, Andrea L and Wisniewska, Monika and Lempicki, Aleksander and Brecher, Charlie and Glodo, J.},
abstractNote = {Ceramic materials show significant promise for the production of reasonably priced, large-size scintillators. Ceramics have recently received a great deal of attention in the field of materials for laser applications, and the technology for fabricating high-optical-quality polycrystalline ceramics of cubic materials has been well developed. The formation of transparent ceramics of non-cubic materials is, however, much more difficult as a result of birefringence effects in differently oriented grains. Here, we will describe the performance of a few new ceramics developed for the detection of gamma- and x-ray radiation. Results are presented for ceramic analogs of three crystalline materials - cubic Lu2O3, and non-cubic LaBr3, and Lu2SiO5 or LSO (hexagonal, and monoclinic structures, respectively). The impact of various sintering, hot-pressing and post-formation annealing procedures on the light yield, transparency, and other parameters, will be discussed. The study of LaBr3:Ce shows that fairly translucent ceramics of rare-earth halides can be fabricated and they can reach relatively high light yield values. Despite the fact that no evidence for texturing has been found in our LSO:Ce ceramic microstructures, the material demonstrates a surprisingly high level of translucency or transparency. While the scintillation of LSO:Ce ceramic reaches a light yield level of about 86 % of that of a good LSO:Ce single crystal, its decay time is even faster, and the long term afterglow is lower than in LSO single crystals.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

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