Optically Stimulated Luminescence in KCl:Eu Single Crystals

Authors:
  • HNH. Nanto
    H. Nanto
  • KMK. Murayama
    K. Murayama
  • YUY. Usuda
    Y. Usuda
  • STS. Taniguchi
    S. Taniguchi
  • NTN. Takeuchi
    N. Takeuchi
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Abstract
Intense optically stimulated luminescence (OSL) with a peak at about 420 nm is observed, for the first time, in europium-doped potassium chloride (KCl:Eu) single crystals irradiated by X rays or ultraviolet. The 420 nm OSL intensity increases linearly with increasing X ray absorbed dose or UV dose. This suggests that KCl:Eu is useful as a material for a two-dimensional X ray or UV imaging sensor utilising the OSL phenomenon. All the results obtained are consistent with the proposed emission mechanism of a 420 nm OSL peak, based on the recombination of electrons released from the F centres with Eu3+ ions.