The effect of optical bleaching at selected photon energies on the thermoluminescence of LiF:Mg,Ti

G. Reshes, S. Druzhyna, S. Biderman, I. Eliyahu, L. Oster, Y. S. Horowitz

Research output: Contribution to journalConference articlepeer-review

Abstract

A new interpretation of the optical absorption energy spectrum of LiF:Mg,Ti (TLD-100) is presented in which the 4.0 eV band is composed of two-sub-bands at 3.8 eV and 4.3 eV. The new interpretation is of central importance in the understanding of the geminate recombination mechanisms giving rise to composite glow peak 5 in the thermoluminescence (TL) of TLD-100. Photon bleaches at energies of 3.6 eV and 4.3 eV on samples of gamma irradiated TLD-100 were carried out in order to investigate the correlation of the 4.3 eV absorption band with the electron-hole configuration giving rise to glow peak 5a and the 3.8 eV absorption band with the e-only configuration giving rise to glow peak 5. The 4.3 eV bleach decreases peak 5a dramatically and increases peak 4 (a hole-only configuration). No such effect is observed following the 3.6 eV bleach. The results strongly support the suggested structures giving rise to the 4.3 eV and 3.8 eV bands observed in the optical absorption energy spectrum.

Original languageEnglish
Article number012016
JournalIOP Conference Series: Materials Science and Engineering
Volume169
Issue number1
DOIs
StatePublished - 16 Feb 2017
Event2016 International Conference on Defects in Insulating Materials, ICDIM 2016 - Lyon, France
Duration: 10 Jul 201615 Jul 2016

Keywords

  • TLD-100
  • Thermoluminescence
  • absorption
  • composite glow peak 5
  • photon bleaching

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering

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