Interference of autoionising transitions in fast ion-atom collisions
- 14 May 1986
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 19 (9) , 1361-1370
- https://doi.org/10.1088/0022-3700/19/9/016
Abstract
The authors show that the influence of post-collision interaction (PCI) on the energy spectra of autoionisation electrons cannot be neglected in ion-atom collisions, even at collision energies as high as several hundred keV and with light projectiles. By means of a classical treatment they derive simple formulae that allow PCI effects to be properly taken into account at high collision energies. From electron energy spectra calculated with these formulae it becomes obvious that interferences of autoionising transitions can significantly influence the apparent peak intensities, even if these peaks seem to be well separated and no typical interference structures can be observed. The authors reanalyse the experimental data of Itoh et al. (1985) who investigated the electron spectra from high-energy He++He collisions and found peculiarities in the collision energy dependence of the observed electron intensities.Keywords
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