Mechanism of photo-stimulated luminescence in copper and Europium doped alkali halide phosphors

Pradip Bandyopadhyay, M. T. Jose, U. Madhusoodanan, B. S. Panigrahi

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

The mechanism of Photo-stimulated Luminescence (PSL) is investigated in copper and europium doped KCl. Electron Paramagnetic Resonance, Photoluminescence, and X-ray Photoelectron Spectroscopy measurements were performed on powdered samples of KCl:Cu+ and KCl:Eu2+, γ-irradiated at room temperature. Our results show that the charge state conversion of Cu+ to Cu2+ does not take place after γ-irradiation in KCl:Cu, and that the observed PSL does not involve Cu2+-F recombination. In KCl:Eu2+, even though a significant reduction in Eu2+ concentration is detected after γ-irradiation, the PSL is not due to Eu3+-F recombination. The energy transfer from the recombination process involving F centers to the activator ions Cu+ and Eu2+ in KCl seems to cause the PSL in these materials.

Original languageEnglish (US)
Pages (from-to)45-50
Number of pages6
JournalRadiation Effects and Defects in Solids
Volume149
Issue number1 -4 pt 1
StatePublished - Dec 1 1999
EventProceedings of the 1998 8th Europhysical Conference on Defects in Insulating Materials, EURODIM 98 - Keele, UK
Duration: Jun 6 1998Jun 11 1998

All Science Journal Classification (ASJC) codes

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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