DocumentCode :
3356484
Title :
Development of SrI2 scintillators for spectroscopy and x-ray imaging applications
Author :
Alaribe, Leonard ; Disch, Christian ; Fauler, Alex ; Engels, Ralf ; Keller, Egbert ; Cecilia, Angelica ; Rolo, Tomy Dos Santos ; Hamann, Elias ; Fiederle, Michael
Author_Institution :
FMF-Freiburger Materialforschungszentrum, Freiburg, Germany
fYear :
2011
fDate :
23-29 Oct. 2011
Firstpage :
1567
Lastpage :
1571
Abstract :
Currently, there is a great interest in the research and development of SrI2:Eu2+ scintillating crystals. The high light yield, high density (4.6 g/cm3) and high effective atomic number (49.4) make the Eu2+-activated SrI2 suitable for use as x-ray and gamma ray detector. SrI2:Eu2+-single crystals were grown with the vertical Bridgman technique in silica ampoules to prevent melt hydration and oxygen contamination during the crystal growth. For measurements, crystals were hermetically encapsulated in aluminum containers with quartz glass optical windows. The radioluminescence spectra of the SrI2:Eu2+-samples show maximum at 431 nm and 432 nm for the 5% and 6% dopant concentrations respectively. The light yield of the bulk samples was up to 80 000 photons/MeV and up to 119 000 photons/MeV for a 360 μm sample integrated in an x-ray imaging setup.
Keywords :
X-ray imaging; crystal growth from melt; density; europium; gamma-ray detection; solid scintillation detectors; strontium compounds; SrI2:Eu2+; X-ray imaging; crystal growth; density; effective atomic number; gamma-ray detector; light yield; melt hydration; oxygen contamination; radioluminescence spectra; scintillating crystal; spectroscopy; vertical Bridgman technique; wavelength 431 nm; wavelength 432 nm; Aluminum; Crystals; Photonics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
ISSN :
1082-3654
Print_ISBN :
978-1-4673-0118-3
Type :
conf
DOI :
10.1109/NSSMIC.2011.6154633
Filename :
6154633
Link To Document :
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