Eur. Phys. J. D 41, 475-483 (2007)
https://doi.org/10.1140/epjd/e2006-00245-5

Application of R-matrix method to electron-H₂S collisions in the low energy range

Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India

Corresponding author: ^a monika123_in@yahoo.co.in

Received: 24 August 2006
Revised: 13 October 2006
Published online: 15 November 2006

Abstract

Electron-H₂S collision process is studied using the R-matrix method. Nine low-lying states of H₂S molecule are considered in the R-matrix formalism to obtain elastic integral, differential, momentum transfer and excitation cross sections for this scattering system. We have represented our target states using configuration interaction (CI) wavefunctions. We obtained adequate representation of vertical spectrum of the target states included in the scattering calculations. The cross sections are compared with the experiment and other theoretical results. We have obtained good agreement for elastic and momentum transfer cross sections with experiment for entire energy range considered. The differential cross sections are in excellent agreement with experiment in the range 3–15 eV. A prominent feature of this calculation is the detection of a shape resonance in ²B₂ symmetry which decays via dissociative electron attachment (DEA). Born correction is applied for the elastic and dipole allowed transition to account for higher partial waves excluded in the R-matrix calculation. The electron energy range is 0.025–15 eV.