Luminescence-based retrospective dosimetry using Al2O3 from mobile phones: a simulation approach to determine the effects of position

Jonathan Eakins, E. Kouroukla

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Monte Carlo modelling has been performed in support of efforts to establish emergency dosimetry services based on optically or thermally stimulated luminescence (OSL/TL) of the Al2O3 substrate present on the resistors found in mobile phones, which can act as fortuitous retrospective dosemeters for photon exposures. Specifically, a range of exposure conditions has been modelled to assess the dependence of the dosimetry on factors such as the position of resistors within a phone, the orientation of the phone relative to the source, and the location of the phone relative to its owner. Variations due to the resistors' positions and the phone's orientation were generally found to contribute just a few percent to the uncertainty on the dose assessments, though the electrical contacts surrounding the resistors could potentially enhance these by several 10s of percent. But, the location of the phone was found to impact dosimetry greatly. The largest discrepancies in the results were found for low-energy exposures: for 192Ir, differences of up to an order-of-magnitude were found between resistor and whole body doses. The outcome of the work was to derive correction / calibration factors that can be applied to estimate whole body doses from OSL/TL readings, the accurate application of which would depend on the knowledge of the exposure geometry and the degree of conservatism acceptable for the dose assessment.

Original languageEnglish
Article number343
Pages (from-to)343-381
Number of pages39
JournalJournal of Radiological Protection
Volume35
Issue number2
DOIs
Publication statusPublished - 1 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd.

Keywords

  • Aluminium oxide
  • Mobile phone
  • Monte Carlo
  • Optically stimulated luminescence (OSL)
  • Retrospective / fortuitous / emergency / accident dosimetry
  • Thermoluminescence (TL)

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