Positron scattering from ethane: Elastic and inelastic scattering

Abstract

This paper presents measurements of scattering of positrons from ethane. Grand total, total elastic, total positronium formation, total ionization, and angular differential elastic-scattering cross sections have been observed and are shown along with comparisons to previous experimental and theoretical values. There are a number of discrepancies with previous data and some discussion of these and possible explanations are presented. This wider range of scattering measurements provides a more comprehensive picture of positron scattering from this target and then allows us to suggest pathways to resolution of the existing disagreements. However, it is clear that there is significant further work to be done before we can consider that we have a full understanding of the scattering process from this relatively simple target species.