OSL and TL in LiF:Mg,Ti following alpha particle and beta ray irradiation: Application to mixed-field radiation dosimetry

Leonido Oster, Y. S. Horowitz, L. Podpalov

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The optically stimulated luminescence (OSL) of LiF:Mg,Ti (TLD-100) following irradiation by beta and alpha particles was investigated by the measurement of the excitation and emission spectra of OSL and comparison with thermoluminescence (TL) characteristics. Measurements were also carried out on nominally pure LiF monocrystals. The preferential excitation of OSL compared to TL following high-ionisation density (HID) alpha irradiation is naturally explained via the identification of OSL with the 'two-hit' F2 or F3 + centre, whereas the major component of composite TL glow peak 5 is believed to arise from a 'one-hit' complex defect. This discovery allows near-total discrimination between HID radiation and low-ionisation density radiation and may have significant potential in mixed-field radiation dosimetry.

Original languageEnglish
Pages (from-to)261-265
Number of pages5
JournalRadiation Protection Dosimetry
Volume128
Issue number3
DOIs
StatePublished - 1 Feb 2008

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Public Health, Environmental and Occupational Health

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