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. Technol. Phys., ENEA, Italy
Abstract :
A set of undoped, Ce3+-doped and Si4+-codoped Y3Al5O12 (YAG) single crystals were grown by the Czochralski method and submitted to γ irradiation in the dose range 1-236 Gy at RT. Their irradiation induced absorption coefficient was calculated and analyzed. Crystals also underwent light yield (LY) and scintillation decay measurements using the 241Am and 22Na radioactive sources, respectively, in 1 μs time gate. The induced absorption at 550 nm (at the Ce3+ luminescence peak) decreases with Ce concentration and further decrease is obtained in the Si4+-codoped samples. LY values are independent on the Ce3+ concentration within 0.12% - 0.3% and on the moderate Si4+ codoping as well.
Keywords :
absorption coefficients; crystal growth from melt; doping; gamma-ray detection; gamma-ray effects; impurity absorption spectra; luminescence; scintillation; solid scintillation detectors; yttrium compounds; 1 to 236 Gy; 550 nm; 22Na radioactive source; 241Am radioactive source; Ce concentration; Ce3+ luminescence peak; Czochralski method; Si4+ codoping; YAG:Ce scintillation characteristics; YAG:Ce,Si; YAl5O12:Ce,Si; gamma irradiation; irradiation induced absorption coefficient; light yield; scintillation decay; single crystals; time gate; Chromium; Crystalline materials; Doping; Electromagnetic wave absorption; Ionizing radiation; Luminescence; Photonic crystals; Physics; Telephony; Yttrium;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1462317
