Low energy positron interactions with uracil--total scattering, positronium formation, and differential elastic scattering cross sections

E K Anderson; R A Boadle; J R Machacek; L Chiari; C Makochekanwa; S J Buckman; M J Brunger; G Garcia; F Blanco; O Ingolfsson; J P Sullivan

doi:10.1063/1.4887072

Low energy positron interactions with uracil--total scattering, positronium formation, and differential elastic scattering cross sections

J Chem Phys. 2014 Jul 21;141(3):034306. doi: 10.1063/1.4887072.

Authors

E K Anderson¹, R A Boadle¹, J R Machacek¹, L Chiari², C Makochekanwa¹, S J Buckman¹, M J Brunger², G Garcia³, F Blanco⁴, O Ingolfsson⁵, J P Sullivan¹

Affiliations

¹ ARC Centre for Antimatter-Matter Studies, Research School of Physics and Engineering, The Australian National University, Canberra 0200, Australia.
² ARC Centre for Antimatter-Matter Studies, Flinders University, GPO Box 2100, Adelaide, 5001 SA, Australia.
³ Instituto de Fısica Fundamental, Consejo Superior de Investigationes Cientıficas (CSIC), Serrano 113-bis, E-28006 Madrid, Spain.
⁴ Departamento de Fısica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid, E-28040 Madrid, Spain.
⁵ Department of Chemistry, Science Institute, University of Iceland, Reykjavík 107, Iceland.

PMID: 25053319
DOI: 10.1063/1.4887072

Abstract

Measurements of the grand total and total positronium formation cross sections for positron scattering from uracil have been performed for energies between 1 and 180 eV, using a trap-based beam apparatus. Angular, quasi-elastic differential cross section measurements at 1, 3, 5, 10, and 20 eV are also presented and discussed. These measurements are compared to existing experimental results and theoretical calculations, including our own calculations using a variant of the independent atom approach.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Elasticity
Electrons*
Models, Molecular
Quantum Theory
Uracil / chemistry*

Substances

Uracil