Electron anticapture to the continuum in double-binary electron - atom collisions
- 28 August 1996
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 29 (16) , 3741-3746
- https://doi.org/10.1088/0953-4075/29/16/017
Abstract
We report experimental evidence of electron anticapture to the continuum at about in - Ar scattering at 1000 eV. This double-binary collision mechanism (the electron scattering analogue of the Thomas forward peak in ion - atom scattering) has been isolated by studying correlated projectile and ejected electrons travelling in the same direction following - Ar collisions. The cross section for this process rises as is approached, but drops precipitously at about . The dip is the signature of anticapture to the continuum for negative projectiles and corresponds to a zero Coulomb density of states factor at . In addition, a significant departure from the Rutherford formula is found for the one-electron differential cross section at large scattering angles.Keywords
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