Influence of color centers on the luminescent response of radiation-damaged CsI: Tl crystal

V. Yakovlev, L. Trefilova, V. Alekseev, A. Karnaukhova, O. Shpylynska, A. Lebedynskiy, O. Tarakhno

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Abstract

Luminescence properties of Tl0va + and Tl2+vc - color centers induced by irradiation in CsI:Tl crystal are studied within a temperature range of 80-300 K. It is found, that electron Tl0va + and hole Tl2+vc - color centers arising due to radiation damage do not reduce conversion efficiency of CsI:Tl crystal, but participate in scintillation process to get energy from Tl+ centers by resonance. Degradation of the light yield of the irradiated CsI:Tl crystal is caused by the radiative energy transfer from Tl+ to Tl0va + centers, whose emission is quenched at temperature above 210 K. Non-radiative energy transfer from Tl+ to Tl2+vc - centers results in long-wave spectral shift and the duration increase of the scintillation pulse.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalFunctional Materials
Volume25
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

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Keywords

  • Color center
  • Energy transfer
  • Luminescence
  • Radiation damage
  • Thallium doped cesium iodide

ASJC Scopus subject areas

  • Materials Science(all)

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