Interaction mechanisms and cross sections for the scattering of low-energy electrons from HBr
- 28 May 1978
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 11 (10) , 1849-1860
- https://doi.org/10.1088/0022-3700/11/10/019
Abstract
Differential cross sections for the scattering of electrons from HBr have been measured for energies below 10 eV. For the elastic rotational ( Delta v=0) scattering the energy and angular dependences of the cross sections are characterised by a steep increase towards small energies and angles, respectively, indicating the importance of direct dipole scattering in the low-energy range. In contrast, the vibrational excitation is clearly dominated by resonance processes. In all channels observed (up to nu =5) the excitation functions show a sharp and pronounced peak close to threshold and a broader but distinct resonance structure at higher energies. For both structures the angular behaviour is found to be isotropic.Keywords
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