Modeling dynamical correlation forces in low-energy positron scattering from polyatomic gases: A comparison for CH4

F. A. Gianturco, T. L. Gibson, P. Nichols, R. R. Lucchese, T. Nishimura

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Two different models for treating the contributions of dynamical electron-positron correlation forces to the full interaction between low-energy positron beams scattered off polyatomic gases are considered and applied to obtain the elastic integral and differential cross sections (at collision energies below Ps formation) for the methane molecule. The computed quantities are then compared with available experiments, both for integral and differential data, and found to be in good accord with measured quantities. Both models also agree rather closely with each other and the physical reasons for this behavior are briefly discussed.

Original languageEnglish
Pages (from-to)673-680
Number of pages8
JournalRadiation Physics and Chemistry
Volume68
Issue number3-4
DOIs
StatePublished - 2003

Keywords

  • Correlation forces
  • Molecular gases
  • Positron scattering

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