Identification of multiple charge carrier trapping centers in irradiated LiF:Mg,Ti via optical absorption studies: The 2.78 eV and 5.0 eV (F center) absorption bands

L. Oster, Y. S. Horowitz, N. Issa

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The optical absorption (OA) and thermoluminescence (TL) of irradiated LiF:Mg,Ti (TLD-100) was studied as a function of the temperature of post-irradiation annealing using the Im-Tstop and Tm-Tstop techniques. Computerised deconvolution was used to resolve the OA spectra into individual Gaussian bands and the TL glow curve into component glow peaks. Preferential population of the 2.78 eV OA band at high ionisation density suggests that this band may arise from a multiple ("two-hit") charge carrier trapping structure. The remarkable similarity between the thermal bleaching behaviour of the "single-hit" 5.0 eV (F -band) and the 2.78 eV band leads to the suggestion that the 2.78 cV band arises from an F2 trapping center, i.c., two adjacent anion vacancies which together capture two electrons.

Original languageEnglish
Pages (from-to)733-736
Number of pages4
JournalMaterials Science Forum
Volume239-241
DOIs
StatePublished - 1 Jan 1997

Keywords

  • LiF:Mg,Ti
  • Optical Absorption
  • Thermoluminescence
  • Trapping Centers

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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