Influence of fδ(D) on modified track structure theory efficiency calculations

O. Avila, M. E. Brandan, Y. S. Horowitz, L. Oster

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Modified track structure theory (MTST) has been successfully applied to evaluate proton-to-gamma and helium-to-gamma relative TL efficiencies in LiF by using Monte Carlo radial dose distributions and the measured dose response function, fδ(D), of 8. 1 keV X rays. In this work, an investigation is performed to study the effect of the choice of fδ(D) for the reference test radiation field, on the predicted MTST proton-to-gamma and helium-to-gamma efficiency values. Results from two sets of calculations are presented. Set 1 investigates five fδ(D) functions with different shapes and its influence on the MTST efficiency values while set 2 applies MTST using several fδ(D) functions selected with fδ(D)max ranging from 2 to 4. Comparison of the predicted efficiency values with experimental data show that the choice of 8.1 keV X rays gives the best description of the data. Results from set 2 show that predicted efficiencies may vary by as much as 44% for peak 5 and as much as 70% for the total signal among different fδ(D). This confirms the importance of using the adequate fδ(D) from a test radiation which simulates as much as possible the energy spectra and irradiated volume produced by the secondary electrons arising from the heavy charged particle radiation under study.

Original languageEnglish
Pages (from-to)163-166
Number of pages4
JournalRadiation Protection Dosimetry
Issue number1-4
StatePublished - 1 Jan 2002
Externally publishedYes

ASJC Scopus subject areas

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


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