The Factorisation Approximation in Electron-Atom Ionisation
Abstract
The distorted-wave impulse approximation for ionisation in a three-body model treats the two-body subsystems to all orders in the relevant potentials. It can only be calculated by making the approximation of factorising out the electron-electron T matrix. In the distorted-wave Born approximation the factorised and unfactorised amplitudes can both be calculated. They are compared for different kinematic ranges, to provide some insights into the validity of factorisation. The bound states used for illustration are the 2s and 2p Hartree-Fock orbitals of neon. It is concluded that factorisation is a good approximation near the bound-electron Bethe ridge, expect for very small momentum transfer.
Recommended Citation
D. H. Madison et al., "The Factorisation Approximation in Electron-Atom Ionisation," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 22, no. 12, pp. 2041 - 2048, Institute of Physics - IOP Publishing, Jun 1989.
The definitive version is available at https://doi.org/10.1088/0953-4075/22/12/019
Department(s)
Physics
International Standard Serial Number (ISSN)
0953-4075
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1989 Institute of Physics - IOP Publishing, All rights reserved.
Publication Date
01 Jun 1989
