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Dose point kernels in liquid water: An intra-comparison between GEANT4-DNA and a variety of Monte Carlo codes

Authors
Journal
Applied Radiation and Isotopes
0969-8043
Publisher
Elsevier
Volume
83
Identifiers
DOI: 10.1016/j.apradiso.2013.01.037
Keywords
  • Dose Point Kernel
  • Geant4-Dna
  • Monte Carlo Codes
  • Liquid Water
Disciplines
  • Biology

Abstract

Abstract Modeling the radio-induced effects in biological medium still requires accurate physics models to describe the interactions induced by all the charged particles present in the irradiated medium in detail. These interactions include inelastic as well as elastic processes. To check the accuracy of the very low energy models recently implemented into the GEANT4 toolkit for modeling the electron slowing-down in liquid water, the simulation of electron dose point kernels remains the preferential test. In this context, we here report normalized radial dose profiles, for mono-energetic point sources, computed in liquid water by using the very low energy “GEANT4-DNA” physics processes available in the GEANT4 toolkit. In the present study, we report an extensive intra-comparison of profiles obtained by a large selection of existing and well-documented Monte-Carlo codes, namely, EGSnrc, PENELOPE, CPA100, FLUKA and MCNPX.

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