Wannier theory for double photoionization of noble gases
- 28 April 1991
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 24 (8) , 1917-1933
- https://doi.org/10.1088/0953-4075/24/8/010
Abstract
The Wannier theory not only gives the threshold laws for processes such as near-threshold double photoionization, but also predicts an angular correlation between the two escaping electrons. Within the frame of this theory and using an LS scheme the authors derive the triple, double differential and integral cross sections, for noble gases ions left in the ground or first excited states. The approach should allow a direct comparison with forthcoming experiments, as it uses the individual angles of the two electrons. In the case of unfavoured final states, which have a node when the angle between these electrons is 180', the triple differential cross sections depend critically on the angular correlation. The authors give their detailed structure in space for double ionization by both polarized and unpolarized photons. They also show that a particular choice of Euler angles allows a straightforward integration which leads to the double differential cross sections.Keywords
This publication has 26 references indexed in Scilit:
- A semiclassical investigation of the ionisation threshold lawsJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- Recent Advances in the Numerical Calculation of Ionization AmplitudesPublished by Elsevier ,1989
- Angular distribution of slow photoelectrons near the threshold for double escapeJournal of Physics B: Atomic and Molecular Physics, 1987
- Quantal threshold ionisationJournal of Physics B: Atomic and Molecular Physics, 1986
- Use of a long-range correlation factor in describing triply differential electron impact ionisation cross sectionsJournal of Physics B: Atomic and Molecular Physics, 1985
- Wannier threshold theory for the Coulomb break-up of three-particle systemsJournal of Physics B: Atomic and Molecular Physics, 1984
- Effect of symmetry on two-electron escape at thresholdJournal of Physics B: Atomic and Molecular Physics, 1983
- Double Escape of Two Electrons at Threshold: Dependence on,, andPhysical Review Letters, 1982
- Threshold multiple ionization of atoms. Energy dependence for double and triple escapeJournal of Physics B: Atomic and Molecular Physics, 1976
- Separation of Angles in the Two-Electron ProblemPhysical Review B, 1930