Title :
Effects of calcium co-doping on charge traps in LSO:Ce crystals
Author :
Yang, Kan ; Melcher, Charles L. ; Rack, Philip D. ; Eriksson, Lars
Author_Institution :
Tennessee Univ., Knoxville
fDate :
Oct. 26 2007-Nov. 3 2007
Abstract :
Experimental studies of LSO:Ce crystals co-doped with various concentrations of calcium (0, 0.1, 0.2, 0.3 and 0.4 at% in the melt) are presented. The optical and scintillation properties including the light output, decay time, afterglow and thermoluminescence properties are investigated as a function of calcium concentration. Experimental data show calcium co-doping tends to significantly reduce the trap population. Hence, the decay time of LSO:Ce is shortened and the afterglow is suppressed. Thermoluminescence studies show a strong correlation between the integrated thermoluminescence intensity and the calcium concentration.
Keywords :
afterglows; calcium; cerium; doping profiles; lutetium compounds; scintillation; scintillation counters; thermoluminescence; Lu2SiO4O:Ce,Ca; afterglow; calcium co-doped concentrations; cerium-doped lutetium oxyorthosilicate crystals; charge traps; decay time; light output; optical properties; scintillation properties; thermoluminescence properties; Biomedical engineering; Biomedical optical imaging; Calcium; Crystalline materials; Crystals; Materials science and technology; Optical coupling; Optical pulse shaping; Temperature; X-rays;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0922-8
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2007.4436657
