Dose response and post-irradiation characteristics of the Sunna 535-nm photo-fluorescent film dosimeter

M. K. Murphy, A. Kovács, S. D. Miller, W. L. McLaughlin

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Abstract

Results of characterization studies on one of the first versions of the Sunna photo-fluorescent dosimeter™ have previously been reported, and the performance of the red fluorescence component described. This present paper describes dose response and post-irradiation characteristics of the green fluorescence component from the same dosimeter film (Sunna Model γ), which is manufactured using the injection molding technique. This production method may supply batch sizes on the order of 1 million dosimeter film elements while maintaining a signal precision (1σ) on the order of ±1% without the need to correct for variability of film thickness. The dosimeter is a 1cm×3cm polymeric film of 0.5-mm thickness that emits green fluorescence at intensities increasing almost linearly with dose. The data presented include dose response, post-irradiation growth, heat treatment, dosimeter aging, dose rate dependence, energy dependence, dose fractionation, variation of response within a batch, and the stability of the fluorimeter response. The results indicate that, as a routine dosimeter, the green signal provides a broad range of response at food irradiation (0.3-5kGy), medical sterilization (5-40kGy), and polymer cross-linking (40-250kGy) dose levels.

Original languageEnglish
Pages (from-to)981-994
Number of pages14
JournalRadiation Physics and Chemistry
Volume68
Issue number6
DOIs
Publication statusPublished - Dec 2003

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Keywords

  • Dosimetry
  • Film dosimeters
  • Food irradiation
  • Radiation processing
  • Sterilization

ASJC Scopus subject areas

  • Radiation

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