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Modelling low energy electron and positron tracks for biomedical applications

AuthorsSanz, A.G. ; Fuss, Martina ; Muñoz, Antonio; Blanco, Francisco J. ; Limão-Vieira, Paulo; Brunger, M.J.; Buckman, S.J.; García, Gustavo
KeywordsElectron scattering
Positron interactions
Track simulation
Issue Date2012
PublisherTaylor & Francis
CitationInternational Journal of Radiation Biology 88: 71- 76 (2012)
AbstractPurpose: 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.
Identifiersdoi: 10.3109/09553002.2011.624151
issn: 0955-3002
Appears in Collections:(CFMAC-IFF) Artículos
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