Mutual ionization in 200-keV H{sup -}+He collisions

We studied mutual ionization in 200-keV H{sup -}+He collisions in a kinematically complete experiment by measuring the fully momentum-analyzed recoil ions and both active electrons in coincidence. Comparison of the data to our calculations, based on various theoretical models, show that mutual ioniz...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2005-12, Vol.72 (6)
Main Authors: Ferger, T., Fischer, D., Moshammer, R., Voitkiv, A. B., Najjari, B., Ullrich, J., Schulz, M., Institut fuer Kernphysik, Universitaet Frankfurt, Max-von-Laue-Strasse 1, 60438 Frankfurt
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ATOMS
COMPARATIVE EVALUATIONS
ELECTRONS
HELIUM
HYDROGEN IONS 1 MINUS
ION-ATOM COLLISIONS
IONIZATION
KEV RANGE
RECOILS
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Summary:We studied mutual ionization in 200-keV H{sup -}+He collisions in a kinematically complete experiment by measuring the fully momentum-analyzed recoil ions and both active electrons in coincidence. Comparison of the data to our calculations, based on various theoretical models, show that mutual ionization proceeds predominantly through the interaction between both electrons. The post-collision interaction between the outgoing ejected electrons as well as higher order processes involving the interaction between the core of both collision partners are also important.
ISSN:1050-2947
1094-1622
DOI:10.1103/PHYSREVA.72.0