期刊
INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
卷 88, 期 1-2, 页码 66-70出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/09553002.2011.598209
关键词
Radiation physics; Monte Carlo simulation; microdosimetry
资金
- Spanish Ministerio de Ciencia e Innovacion [FPA2009-14091-C02-01]
- FEDER
- Generalitat de Catalunya [2009 SGR 276]
- Swedish Research Council
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.
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