Title :
Radiation damage in pure and RE-doped LiBaF3 crystals
Author :
Gektin, A.V. ; Shiran, N.V. ; Voronova, V.V.
Author_Institution :
Inst. for Single Crystals, Kharkov, Ukraine
Abstract :
Absorption, emission, excitation and thermoluminescence were investigated for pure, Eu- and Ce-doped LiBaF3 crystals, both as grown and irradiated. It is shown that the purity of initial crystal is a prerequisite to reduce the afterglow and decrease the radiation damage level. Doping by Ce or Eu ions is a way to vary the spectral and kinetic characteristic. The exciton luminescence and blue afterglow are suppressed in Eu- or Ce-doped crystals. Radiation induced absorption spectrum is complicated and includes more than six overlapped bands. Emission of these color centers appears in the luminescence spectrum
Keywords :
X-ray effects; afterglows; barium compounds; cerium; colour centres; europium; excitons; gamma-ray effects; impurity absorption spectra; lithium compounds; radiation effects; thermoluminescence; ultraviolet spectra; visible spectra; LiBaF3; LiBaF3 crystals; LiBaF3:Ce; LiBaF3:Eu; blue afterglow; color centers; emission spectra; excitation spectra; exciton luminescence; kinetic characteristic; overlapped bands; radiation damage; radiation induced absorption spectrum; spectral characteristic; thermoluminescence; Crystalline materials; Doping; Electromagnetic wave absorption; Energy exchange; Excitons; Kinetic theory; Luminescence; Photonic crystals; Stability; Temperature distribution;
Conference_Titel :
Nuclear Science Symposium, 1996. Conference Record., 1996 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-3534-1
DOI :
10.1109/NSSMIC.1996.590956
