Distorted-wave Born approximation for electron-helium double differential ionisation cross sections
- 14 July 1989
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 22 (13) , 2189-2193
- https://doi.org/10.1088/0953-4075/22/13/023
Abstract
The distorted-wave Born approximation (DWBA) has special theoretical significance because it is possible to calculate scattering to low-lying states of an atom using an optical potential to describe higher target states, including the continuum, for which DWBA is the only approximation. The double differential cross section gives a representation of integrated cross section data that is convenient for assessing the validity of the DWBA in the optical potential context. For primary and secondary electrons from helium at 100, 300 and 500 eV the DWBA represents larger cross sections very well. For smaller cross sections it is an overestimate.Keywords
This publication has 7 references indexed in Scilit:
- The factorisation approximation in electron-atom ionisationJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- Wavefunction mapping in collision experimentsReports on Progress in Physics, 1988
- Absolute double differential ionization cross-section for electron impact: HeIl Nuovo Cimento D, 1987
- Double differential cross sections for electron impact ionisation of heliumJournal of Physics B: Atomic and Molecular Physics, 1986
- Distorted-wave approximations for the triple-differential cross section for ionisation of helium by electron impactJournal of Physics B: Atomic and Molecular Physics, 1978
- Triple-differential cross sections for electron-impact ionization of heliumPhysical Review A, 1977
- Tables of secondary-electron-production cross sectionsAtomic Data and Nuclear Data Tables, 1972