Positron interactions with water-total elastic, total inelastic, and elastic differential cross section measurements

9 págs.; 5 figs.; 4 tabs.© 2014 AIP Publishing LLC. Utilising a high-resolution, trap-based positron beam, we have measured both elastic and inelastic scattering of positrons from water vapour. The measurements comprise differential elastic, total elastic, and total inelastic (not including positronium formation) absolute cross sections. The energy range investigated is from 1 eV to 60 eV. Comparison with theory is made with both R-Matrix and distorted wave calculations, and with our own application of the Independent Atom Model for positron interactions.This work has been supported by the Australian Research Council’s Centre of Excellence Program. G.G. and F.B. would like to acknowledge the Spanish Ministerio de Economıa y Competitividad (project FIS2012-31230). Some financial support through COST Action “Nano-IBCT” is also gratefully acknowledged.Peer Reviewe