Electron capture to the continuum manifestation in fully differential cross sections for ion impact single ionization

We present theoretical calculations of single ionization of He atoms by protons and multiply charged ions. The kinematical conditions are deliberately chosen in such a way that the ejected electron velocity matches the projectile impact velocity. The computed fully differential cross sections (FDCS)...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2018-04, Vol.51 (8), p.85204
Main Authors: Ciappina, M F, Fojón, O A, Rivarola, R D
Format: Article
Language:English
Subjects:
distorted wave theories
ion collisions
two-center effects
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Summary:We present theoretical calculations of single ionization of He atoms by protons and multiply charged ions. The kinematical conditions are deliberately chosen in such a way that the ejected electron velocity matches the projectile impact velocity. The computed fully differential cross sections (FDCS) in the scattering plane using the continuum-distorted wave-eikonal initial state show a distinct peaked structure for a polar electron emission angle θk = 0°. This element is absent when a first order theory is employed. Consequently, we can argue that this peak is a clear manifestation of a three-body effect, not observed before in FDCS. We discuss a possible interpretation of this new feature.
ISSN:0953-4075
1361-6455
DOI:10.1088/1361-6455/aab5dc