Eur. Phys. J. D 31, 45-51 (2004)
https://doi.org/10.1140/epjd/e2004-00134-y

Elastic and total cross-sections for electron scattering by acetylene in the intermediate energy range

¹ Departamento de Química, UFSCar, 13565-905 São Carlos, SP, Brazil
² Instituto de Física “Gleb Wataghin”, UNICAMP, 13083-970 Campinas, SP, Brazil
³ Departamento de Física, UFSCar, 13565-905 São Carlos, SP, Brazil

Corresponding author: ^a bresca@ifi.unicamp.br

Received: 7 June 2004
Revised: 26 August 2004
Published online: 5 October 2004

Abstract

We present a joint theoretical-experimental study on electron scattering by C₂H₂ in the intermediate energy range. We report calculated elastic differential, integral, and momentum-transfer as well as total (elastic + inelastic) and absorption cross-sections at impact energies ranging from 10 to 500 eV. Also, experimental absolute elastic cross-sections are reported in the (50–500)-eV energy range. A complex optical potential is used to represent the electron-molecule interaction dynamics. The iterative Schwinger variational method, combined with the distorted-wave approximation, is used to solve the scattering equations. Experimentally, the angular distributions of the scattered electrons are converted to absolute cross-sections using the relative flow technique. The comparison of our calculated with our measured results, as well as with other experimental and theoretical data available in the literature, is encouraging.