Low-energy electron scattering by HBr

R. Fandreyer*, P. G. Burke, L. A. Morgan, C. J. Gillan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


The R-matrix method is extended to treat electron scattering from molecules containing a heavy atom. It is then used to calculate low energy total elastic and vibrational excitation cross sections for e--HBr scattering. Results are obtained at the equilibrium internuclear separation using two approximations: the first in which polarization effects are represented by the inclusion of quadratically integrable correlation functions and the second in which polarized pseudostates as well as the target ground state are retained in the total wavefunction expansion. The calculations using the first approximation are carried out for a range of internuclear separations and the vibrational motion is then included using a non-adiabatic R-method approach. A low energy2å resonance is found in the fixed-nuclei calculations which gives rise to sharp threshold peaks in the vibrational excitation cross sections in qualitative accord with experiment. These peaks are interpreted as being due to the nuclear excited Feshbach resonance mechanism.

Original languageEnglish
Pages (from-to)3625-3637
Number of pages13
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number20
Publication statusPublished - 28 Oct 1993

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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