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Analytical model of ionization and energy deposition by proton beams in subcellular compartments

  • Pablo de Vera
  • Eugene Surdutovich
  • Isabel Abril
  • Rafael Garcia-Molina
  • Andrey V. Solov’yov
Regular Article
Part of the following topical collections:
  1. Topical Issue: Nano-scale Insights into Ion-beam Cancer Therapy

Abstract

We present an analytical model to evaluate in a fast, simple and effective manner the energy delivered by proton beams moving through a cell model made of nucleus and cytoplasm, taking into account the energy carried by the secondary electrons generated along the proton tracks. The electronic excitation spectra of these subcellular compartments have been modelled by means of an empirical parameterization of their dielectric properties. The energy loss rate and target ionization probability induced by swift protons are evaluated by means of the dielectric formalism. With the present model we have quantified the energy delivered, the specific energy, and the number of ionizations produced per incoming ion in a typical human cell by a typical hadrontherapy proton beam having energies usually reached around the Bragg peak (below 20 MeV). We find that the specific energy per incoming ion delivered in the nucleus and in the cytoplasm are rather similar for all the proton energy range analyzed.

Keywords

Liquid Water Secondary Electron Proton Beam Bragg Peak Linear Energy Transfer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Pablo de Vera
    • 1
    • 2
  • Eugene Surdutovich
    • 3
  • Isabel Abril
    • 1
  • Rafael Garcia-Molina
    • 4
  • Andrey V. Solov’yov
    • 2
  1. 1.Departament de Física AplicadaUniversitat d’AlacantAlacantSpain
  2. 2.Frankfurt Institute for Advanced StudiesFrankfurt am MainGermany
  3. 3.Department of PhysicsOakland UniversityRochesterUSA
  4. 4.Departamento de Física — Centro de Investigación en Óptica y Nanofísica, Regional Campus of International Excellence “Campus Mare Nostrum”Universidad de MurciaMurciaSpain

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