Modelling low energy electron and positron tracks for biomedical applications

Ana G. Sanz, Martina C. Fuss, Antonio Muñoz, Francisco Blanco, Paulo Limão-Vieira, Michael J. Brunger, Stephen J. Buckman, Gustavo García

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

Purpose: To incorporate the effects of low energy electrons and positrons into radiation interaction models. Materials and methods: The simulation method proposed here was based on experimental and theoretical cross section data and energy loss spectra we have previously derived. After a summary of the main techniques used to obtain reliable input data, the basis of a Low Energy Particle Track Simulation (LEPTS) procedure was established. The programme is specifically designed to describe electron and positron interactions below 10 keV, down to thermal energies. Results: Single electron and positron tracks in water are presented and the possibility of using these results to develop tools for nanodosimetry is discussed. Conclusions: Standard approximations based on high incident energies, such as the Born-Bethe theory, are not suitable to simulate electron and positron tracks below 10 keV. Prior to the inclusion of low-energy effects in a radiation model, an appropriate study is required to determine both the interaction cross sections and the energy loss spectra.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalInternational Journal Of Radiation Biology
Volume88
Issue number1-2
DOIs
Publication statusPublished - 1 Jan 2012

Keywords

  • Electron scattering
  • Positron interactions
  • Track simulation

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