Localized and delocalized transitions and optical excitation of LiF:Mg,Ti following alpha and beta irradiation

L. Oster, Y. S. Horowitz, S. Biderman, Y. Fuks, Y. Belaish, D. Sattinger

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

It is shown that glow peak 5a (a low-temperature satellite of the major glow peak 5) arises from localized electron-hole recombination in a trapping center (TC)-luminescent center (LC) pair believed to be based on Mg2+ -Livac trimers (the TCs) coupled to Ti(OH)n molecules (the LCs). Peak 5 arises from the same complex which has captured an electron only, and peak 4 arises from a very similar complex which has captured a hole only. It is demonstrated experimentally that optical excitation of irradiated LiF:Mg,Ti (TLD-100) by 4 eV photons has the same effect for both alpha particle (high ionization density) irradiation and photon/electron irradiation. In both cases, peak 5a converts to peak 4 causing peak 4 to increase following the bleach. Such an observation is consistent with the major premise of track structure theory, that radiation effects following heavy charged particle (HCP)/neutron irradiation are due exclusively to the interaction of the secondary electrons created by the HCP slowing down.

Original languageEnglish
Pages (from-to)146-148
Number of pages3
JournalJournal of Luminescence
Volume122-123
Issue number1-2
DOIs
StatePublished - 1 Jan 2007

Keywords

  • Geminate recombination
  • LiF:Mg
  • Optical bleaching
  • Thermoluminescence
  • Ti

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry (all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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