DOI: https://doi.org/10.30970/jps.02.541
LUMINESCENCE INVESTIGATIONS OF MIXED LITHIUM–CESIUM CHLORIDE USING SYNCHROTRON RADIATION
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Journal of Physical Studies 2(4), 541–544 (1998)
DOI: https://doi.org/10.30970/jps.02.541 LUMINESCENCE INVESTIGATIONS OF MIXED LITHIUM–CESIUM CHLORIDE USING SYNCHROTRON RADIATION |
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V. B. Mikhailik
The Ivan Franko State University of Lviv, Chair of Experimental Physics
8 Kyrylo i Mefodii Str., Lviv, UA–290005, Ukraine
Emission characteristics of mixed lithium–cesium chloride compounds were studied using synchrotron radiation. In addition to the long–living ($10^{-6}$~s) luminescence bands, attributed to the radiative decay of defect centers (2.5~eV) and self–trapped excitons (2.9 and 4.2~eV), a fast wide–band emission peaked at 4.4~eV with the decay constant of 2.0$\pm$ 0.1~ns is found to emerge at excitation by photons with the energy above 14.1~eV. This band is assigned to the impurity core–valence luminescence (CVL) caused by radiative recombination of valence electrons and $5p$Cs–core holes.