Low-energy electron and positron transport in gases and soft-condensed systems of biological relevance

White, R. D., Tattersall, W., Boyle, G., Robson, R.E., Dujko, S., Petrovic, Z.Lj., Bankovic, A., Brunger, M.J., Sullivan, J.P., Buckman, S.J., and Garcia, G. (2014) Low-energy electron and positron transport in gases and soft-condensed systems of biological relevance. Applied Radiation and Isotopes, 83 (Part B). pp. 77-85.

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Abstract

We present a study of electron and positron transport in water in both the gaseous and liquid states using a Boltzmann equation analysis and a Monte-Carlo simulation technique. We assess the importance of coherent scattering processes when considering transport of electrons/positrons in dense gases and liquids. We highlight the importance of electron and positron swarm studies and experiments as a test of the accuracy and completeness of cross-sections, as well as a technique for benchmarking Monte-Carlo simulations. The thermalization of low-energy positrons (< 150 eV) in water is discussed and the sensitivity of the profiles to the form of the cross-sections in this energy region, and assumptions in the microscopic processes, is considered.

Item ID: 31730
Item Type: Article (Refereed Research - C1)
Keywords: positron transport, cross sections, radiation damage modeling, Monte-Carlo simulation, swarm physics
ISSN: 1872-9800
Funders: Australian Research Council (ARC), Australian Academy of Science, COST Action Nano-IBCT, MNRS, Spanish Ministerio de Economia e Innovacion (SMEI)
Projects and Grants: MNRS Project ON171037, MNRS Project III41011, SMEI Project FIS2009-10245
Date Deposited: 26 Feb 2014 09:50
FoR Codes: 02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020201 Atomic and Molecular Physics @ 80%
02 PHYSICAL SCIENCES > 0204 Condensed Matter Physics > 020404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity @ 20%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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