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Local vs. non-local energy loss of low energy ions: Influence of charge exchange processes in close collisions
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
2013 (English)In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, ISSN 0168-583X, E-ISSN 1872-9584, Vol. 317, no Part A, 8-12 p.Article in journal (Refereed) Published
Abstract [en]

We investigate the contribution of charge exchange processes in close collisions between projectile and target atoms to the electronic energy loss of low energy ions. We measure the energy loss of slow hydrogen and He ions in ultrathin Al films through which the ions are transmitted before and after backscattering by the atoms of a Ta substrate. The individual contributions to the energy loss are analyzed. The roles of thresholds for reionization and of scattering kinematics as key parameters for the coupling between elastic and inelastic losses are discussed. The implications of the obtained results for different experimental approaches to deduce stopping cross sections are outlined.

Place, publisher, year, edition, pages
2013. Vol. 317, no Part A, 8-12 p.
Keyword [en]
LEIS, Stopping power, Charge exchange, Transmission, Backscattering, He
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-217633DOI: 10.1016/j.nimb.2012.12.091ISI: 000329378100002OAI: oai:DiVA.org:uu-217633DiVA: diva2:694284
Available from: 2014-02-06 Created: 2014-02-04 Last updated: 2017-12-06Bibliographically approved

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Primetzhofer, Daniel

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