Abstract
This paper studies the scintillation process in CsI:Eu crystal exposed to the pulse electron irradiation (E=0.25 MeV, t1/2=15 ns and W=0.003 J/cm2). It has been proved that the energy transfer from the lattice to Eu2+ ions in CsI:Eu occurs through the re-absorption of STE emission. The proposed model rests on the following experimental facts: (1) the activator emission at 2.68 eV rises gradually after the decay of the excitation pulse even at temperature lower than 90 K when Vk centers are immobile; (2) the rise time of 2.68 eV emission and the decay time of STE emission have the same temperature dependences at T=78-300 K; (3) the excitation spectrum of 2.68 eV emission overlaps the emission spectrum of STE.
| Original language | English |
|---|---|
| Pages (from-to) | 274-276 |
| Number of pages | 3 |
| Journal | Journal of Luminescence |
| Volume | 148 |
| DOIs | |
| Publication status | Published - 1 Apr 2014 |
Keywords
- Cathodoluminescence
- CsI:Eu
- Energy transfer
ASJC Scopus subject areas
- Biophysics
- Atomic and Molecular Physics, and Optics
- Chemistry(all)
- Biochemistry
- Condensed Matter Physics
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Yakovlev, V., Trefilova, L., Karnaukhova, A., & Ovcharenko, N. (2014). Energy transfer mechanism in CsI: Eu crystal. Journal of Luminescence, 148, 274-276. https://doi.org/10.1016/j.jlumin.2013.12.020