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Journal of alloys and compounds v.735, 2018년, pp.2219 - 2224   SCI SCIE
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Scintillation efficiency of binary Li2O-2SiO2 glass doped with Ce3+ and Tb3+ ions

Tratsiak, Y.    (Research Institute for Physical Chemical Problems of Belarusian State University, Leningradskaya str. 14, 220006 Minsk, Belarus   ); Fedorov, A.    (Research Institute for Nuclear Problems, Bobruiskaya str. 11, 220006 Minsk, Belarus   ); Dosovitsky, G.    (NRC “Kurchatov Institute”, Moscow, Russia   ); Akimova, O.    (NRC “Kurchatov Institute”, Moscow, Russia   ); Gordienko, E.    (NRC “Kurchatov Institute”, Moscow, Russia   ); Korjik, M.    (Research Institute for Nuclear Problems, Bobruiskaya str. 11, 220006 Minsk, Belarus   ); Mechinsky, V.    (Research Institute for Nuclear Problems, Bobruiskaya str. 11, 220006 Minsk, Belarus   ); Trusova, E.    (Research Institute for Nuclear Problems, Bobruiskaya str. 11, 220006 Minsk, Belarus  );
  • 초록  

    Abstract Photo- and radioluminescent properties of lithium silicate glasses doped with Ce 3+ and Tb 3+ ions were evaluated. Glasses doped with Ce 3+ ions exhibit a shift of radioluminescence to photo-luminescence band. This effect was explained by a distribution of the crystal field strength in the activator sites, what results in the competition between different types of Ce 3+ ions in absorbing excitation energy from the matrix and limits a light yield of the Ce 3+ doped glass. We also investigated the possibility to use Tb 3+ ion instead of Ce 3+ as an alternative activator for a glass doping. Spin-orbit interaction plays a major role in the formation of electronic terms in Tb 3+ , where as an effect of the crystal field is small enough to form a distribution of emitting centers. Tb 3+ -doped samples demonstrate light yields up to 31000 ph/MeV with the concentration quenching starting at the levels of 10 at %. We also studied the effect of luminescence sensitization of Tb 3+ ions by Ce 3+ in the glasses co-doped with Ce 3+ and Tb 3+ . Highlights The photo-luminescence and scintillation properties of binary Li 2 O-2SiO 2 glasses doped with Ce 3+ and Tb 3+ were investigated. Li 2 O-2SiO 2 glasses doped with Tb 3+ showed scintillation light yield up to 31000 ph/MeV. A shift of radioluminescence to photo-luminescence band in glasses doped with Ce 3+ ions was explained.


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    Glasses .   Scintillators.  

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