Scattering data for modelling positron tracks in gaseous and liquid water

F Blanco, A M Roldán, K Krupa, R P McEachran, Ronald White, Srdjan MARJANOVIĆ, Zoran Petrović, Michael Brunger, J R Machacek, Steven Buckman, James Sullivan, L Chiari, Paolo Limão-Vieira, Gustavo Garcia

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We present in this study a self-consistent set of scattering cross sections for positron collisions with water molecules, in the energy range 0.1–10 000 eV, with the prime motivation being to provide data for modelling purposes. The structure of the database is based on a new model potential calculation, including interference terms, which provides differential and integral
elastic as well as integral inelastic positron scattering cross sections for water molecules over the whole energy range considered here. Experimental and theoretical data available in the literature have been integrated into the database after a careful analysis of their uncertainties and their selfconsistency. These data have been used as input parameters for a step-by-step Monte Carlo
simulation procedure, providing valuable information on energy deposition, positron range, and the relative percentages of specific interactions (e.g. positronium formation, direct ionisation, electronic, vibrational and rotational excitations) in gaseous and liquid water.
Original languageEnglish
Article number145001
Number of pages10
JournalJournal of Physics B: Atomic, Molecular & Optical Physics
Volume49
DOIs
Publication statusPublished - 15 Jun 2016

Keywords

  • Monte Carlo simulation
  • model potential calculations
  • positron-molecule scattering

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