DocumentCode :
1139299
Title :
Influence of Si-Codoping on YAG:Ce Scintillation Characteristics
Author :
Baccaro, S. ; Cecilia, A. ; Mihokova, E. ; Nikl, M. ; Nejezchleb, K. ; Blazek, K.
Author_Institution :
Adv. Techonol. Phys./ION, ENEA, Rome, Italy
Volume :
52
Issue :
4
fYear :
2005
Firstpage :
1105
Lastpage :
1108
Abstract :
A set of undoped, 
-doped and 
-codoped 
[yttrium aluminum garnet (YAG)] crystals were grown by the Czochralski method and submitted to 
irradiation in the dose range 1–236 Gy at RT, to investigate the possibility to reinforce crystal radiation hardness by doping. The absorption coefficients induced by the irradiation were calculated and analyzed. Crystals also underwent light yield (LY) and scintillation decay measurements using the 
and 
radioactive sources in 1 
time gate. The induced absorption at 550 nm (at the luminescence peak) decreases with Ce concentration and further decrease is obtained in the -codoped samples. LY values are independent on the concentration within 0.12% – 0.3% and on the moderate codoping as well.
-doped and -codoped [yttrium aluminum garnet (YAG)] crystals were grown by the Czochralski method and submitted to irradiation in the dose range 1–236 Gy at RT, to investigate the possibility to reinforce crystal radiation hardness by doping. The absorption coefficients induced by the irradiation were calculated and analyzed. Crystals also underwent light yield (LY) and scintillation decay measurements using the and radioactive sources in 1 time gate. The induced absorption at 550 nm (at the luminescence peak) decreases with Ce concentration and further decrease is obtained in the -codoped samples. LY values are independent on the concentration within 0.12% – 0.3% and on the moderate codoping as well.Keywords :
aluminium compounds; cerium; crystal growth from melt; doping profiles; gamma-ray effects; scintillation; silicon; solid scintillation detectors; yttrium compounds; 1 to 236 Gy; 550 nm; 22Na radioactive sources; 241Am radioactive sources; Ce3+ concentration; Ce3+-doped crystals; Czochralski method; Si-codoping; Si4+-codoped crystals; Y3Al5O12; Y3Al5O12:Ce3+Si4+; YAG:Ce scintillation characteristics; absorption coefficients; crystal radiation hardness; gamma-irradiation; light yield measurements; scintillation decay measurements; undoped YAG crystals; yttrium aluminum garnet crystals; Aluminum; Doping; Electromagnetic wave absorption; Garnets; Ionizing radiation; Luminescence; Photonic crystals; Physics; Solid scintillation detectors; Yttrium; Doping; radiation hardness; yttrium aluminum garnet (YAG);
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2005.852664
Filename :
1495812
Link To Document :
