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

Wade Tattersall; Luca Chiari; J R Machacek; Emma Anderson; Ron D White; M J Brunger; Stephen J Buckman; Gustavo Garcia; Francisco Blanco; James P Sullivan

doi:10.1063/1.4862685

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

J Chem Phys. 2014 Jan 28;140(4):044320. doi: 10.1063/1.4862685.

Authors

Affiliations

¹ Centre for Antimatter-Matter Studies, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia.
² Centre for Antimatter-Matter Studies, School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide 5001, South Australia, Australia.
³ Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville, 4810 Queensland, Australia.
⁴ Instituto de Fısica Fundamental, Consejo Superior de Investigationes Cientıficas (CSIC), Serrano 113-bis, E-28006 Madrid, Spain.
⁵ Departamento de Fısica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid, E-28040 Madrid, Spain.

PMID: 25669536
DOI: 10.1063/1.4862685

Abstract

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.