Computerized glow curve deconvolution applied to the analysis of the kinetics of peak 5 in lif:Mg, ti (tld-100)

D. Yossian, Y. S. Horowitz

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

The kinetic parameters of peak 5 in LiF:Mg, Ti (TLD-100) were studied as a function of the duration of post-irradiation annealing at 165 °C. A post-irradiation anneal at 165° C for 20 min reduces the intensity of the lower-temperature satellite, peak 4, to negligible levels. The shape of isolated peak 5 changes as a function of the duration of the post-irradiation annealing. All three kinetic parameters show important changes as the duration of the anneal increases. Computerized peak shape analysis shows that the order of kinetics of peak 5 increases from 1.2 ± 0.05 (1 sd) following a 5 min anneal to 1.72 ± 0.07 (1 sd) following a 30 min anneal. The activation energy increases from 1.75 eV after annealing for 5 min to 2 eV after annealing for 15 min and then remains constant for longer annealing times. However, the position of isolated peak 5 (7max) does not vary with dose, illustrating the weakness of this criterion for determining the order of kinetics or alternately the breakdown of the go model applied to peak 5. Our results indicate important structural modifications in the trapping structure of peak 5 as a function of annealing time and/or the presence of underlying defect reactions leading to these changes in the shape of peak 5.

Original languageEnglish
Pages (from-to)1495-1508
Number of pages14
JournalJournal Physics D: Applied Physics
Volume28
Issue number7
DOIs
StatePublished - 14 Jul 1995

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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