Abstract

The luminescence properties of Ce3+activated strontium haloborates with and without K+ or Na+co-doping have been studied under optical andx-ray excitation. Three types of Ce3+ emissioncentre have been found as the result of different methods of charge compensation innon-co-doped samples. In the co-doped compounds only one type of Ce3+emission centre has been observed. The influence of Ce3+concentration, anion type and co-doping ion on thermoluminescence (TL)has been analysed. The TL glow curves of all the studied materialscontain two peaks. The emission corresponding to the low temperaturepeak is associated with charge uncompensated Ce3+ centresin non-co-doped compounds. The emission of the high temperature peak representsthe superposition of both charge compensated and uncompensated Ce3+centres. The emission corresponding to both TL peaks inco-doped samples originates from one type of Ce3+centre.

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