The effect of target atom polarization and wavefunction distortion in (e - 2e) ionization of hydrogen
- 14 May 1996
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 29 (9) , 1767-1783
- https://doi.org/10.1088/0953-4075/29/9/021
Abstract
Calculations using the distorted-wave first Born model are reported for the triple differential cross section for electron-impact ionization of atomic hydrogen at low energy. They are carried out in the coplanar asymmetric geometry for various deflection angles. Different kinematics are considered: unequal energy sharing between the outgoing electrons at 54.4 eV and equal energy sharing at 27.2, 17.6 and 15.6 eV. We attempt to improve the theoretical description of the initial state and propose four models, three of which include a polarization of the target orbital. The associated polarization potential is used in addition to the static and the static-exchange potentials to calculate the distorted wave. We account for electron-pair correlation in the final state by use of a Gamow correction factor.Keywords
This publication has 21 references indexed in Scilit:
- Correlation forces in electron-scattering processes via density-functional theory: Electron collisions with closed-shell atomsPhysical Review A, 1993
- Threshold angular distributions of (e,2e) cross sections of helium atomsPhysical Review Letters, 1992
- Wavefunction effects in theoretical (e,2e) cross sections for ionization of helium with excitation of the residual ionJournal of Physics B: Atomic, Molecular and Optical Physics, 1991
- Triply-differential cross sections for ionisation of hydrogen atoms by electrons and positronsJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- Triple differential cross sections for electron impact ionisation of atomic hydrogen-a coupled pseudostate calculationJournal of Physics B: Atomic and Molecular Physics, 1987
- Self-interaction correction to density-functional approximations for many-electron systemsPhysical Review B, 1981
- Electron impact excitation cross sectionsComputer Physics Communications, 1974
- The Determination of Phases and Amplitudes of Wave FunctionsProceedings of the Physical Society, 1963
- A Note on the Scattering of Electrons from Atomic HydrogenPhysical Review B, 1959
- Polarization and Exchange Effects in the Scattering of Electrons from Atoms with Application to OxygenPhysical Review B, 1957