• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/095/0167

    • Keywords

       

      Electron scattering; single centre expansion; R-matrix; cross-sections; Hartree–Fock.

    • Abstract

       

      The electron scatterings from isovalent molecules like O$_3$, S$_3$, OSO and SOS are studied using single centre expansion (SCE) approximation. The elastic differential cross-sections, integral and momentum transfer cross-sections are computed for these targets from ionisation threshold to 5 keV. The molecular wave functions of the targets were obtained from the multicentre expansion of the Gaussian-type orbitals within the single determinant Hartree–Fock self-consistent field scheme. The multipole expansion of the target at the centre of mass includes the dipole and quadrupole terms. The target interactions are modelled within the local potential approximation and consist of static, correlation-polarisation and exchange effects. The results are in good agreement with the available experimental and theoretical results. The SCE results match smoothly near the ionisation threshold with the {ab-initio} R-matrix results. This helped in estimating the scattering cross-section data from 0.1 to 5 keV energy. The totalcross-sections obtained by summing the elastic and inelastic cross-sections are also in excellent agreement with the available results. The scattering study from isovalent molecules further helped in understanding the effects of dipole moment, polarisation and geometrical size while evaluating the collision problem.

    • Author Affiliations

       

      ANAND BHARADVAJA1 SAVINDER KAUR2 KASTURI LAL BALUJA3

      1. Department of Physics, Bhaskaracharya College of Applied Sciences (University of Delhi), New Delhi 110 075, India
      2. Department of Physics, SGTB Khalsa College, University of Delhi, Delhi 110 007, India
      3. Formerly at: Department of Physics and Astrophysics, University of Delhi, Delhi 110 007, India
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.