Title :
Effects of charge compensation by Na+ co-doping for Ce3+ doped LiCaAlF6 single crystals
Author :
Yokota, Y. ; Yanagida, T. ; Kawaguchi, N. ; Fukuda, K. ; Yoshikawa, A. ; Nikl, M.
Author_Institution :
Inst. of Multidiscipl. Res. for Adv. Mater., Tohoku Univ., Sendai, Japan
fDate :
Oct. 30 2010-Nov. 6 2010
Abstract :
We have investigated physical properties of Na+, Ce3+ co-doped LiCaAlF6 [Na, Ce:LiCAF] single crystals grown by micro-pulling-down method. In their X-ray diffraction measurements, grown crystals except for Ce 2%, Na 2%:LiCAF indicated a second phase of CeF3. Lattice parameters of LiCAF phase systematically increased with an increase of Na and Ce concentrations. Transmittance of Na co-doped Ce:LiCAF crystals was lower than Ce:LiCAF crystal due to the inclusion of CeF3 in the crystals and emission peaks originated from 5d-4f transition of Ce3+ ion around 285 and 310 nm were observed in all crystals. The light yield became smaller with an increase of Na concentration.
Keywords :
X-ray diffraction; charge compensation; crystal growth; doping; inclusions; lattice constants; photoluminescence; solid scintillation detectors; ultraviolet spectra; visible spectra; LiCaAlF6:Ce,Na; X-ray diffraction measurement; charge compensation effect; crystal growth; crystal inclusion analysis; lattice parameter; light yield analysis; micropulling-down method; neutron scintillator;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2010 IEEE
Conference_Location :
Knoxville, TN
Print_ISBN :
978-1-4244-9106-3
DOI :
10.1109/NSSMIC.2010.5873752
