Limitations (and merits) of PENELOPE as a track-structure code

Abstract Purpose: To outline the limitations of PENELOPE (acronym of PENetration and Energy LOss of Positrons and Electrons) as a track-structure code, and to comment on modifications that enable its fruitful use in certain microdosimetry and nanodosimetry applications. Methods: Attention is paid to...

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Bibliographic Details
Published in:International journal of radiation biology 2012-01, Vol.88 (1-2), p.66-70
Main Authors: Fernández-Varea, José M., González-Muñoz, Gloria, Galassi, Mariel E., Wiklund, Kristin, Lind, Bengt K., Ahnesjö, Anders, Tilly, Nina
Format: Article
Language:English
Subjects:
Elasticity
Electrons
Medicin och hälsovetenskap
microdosimetry
Monte Carlo Method
Monte Carlo simulation
Radiation physics
Space life sciences
Water - chemistry
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Summary:Abstract Purpose: To outline the limitations of PENELOPE (acronym of PENetration and Energy LOss of Positrons and Electrons) as a track-structure code, and to comment on modifications that enable its fruitful use in certain microdosimetry and nanodosimetry applications. Methods: Attention is paid to the way in which inelastic collisions of electrons are modelled and to the ensuing implications for microdosimetry analysis. Results: Inelastic mean free paths and collision stopping powers calculated with PENELOPE and two well-known optical-data models are compared. An ad hoc modification of PENELOPE is summarized where ionization and excitation of liquid water by electron impact is simulated using tables of realistic differential and total cross sections. Conclusions: PENELOPE can be employed advantageously in some track-structure applications provided that the default model for inelastic interactions of electrons is replaced by suitable tables of differential and total cross sections.
ISSN:0955-3002
1362-3095
1362-3095
DOI:10.3109/09553002.2011.598209