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          Institute: MPI für Kernphysik     Collection: Physics of Quantum Dynamics in Atomic Fragmentation     Display Documents



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ID: 60247.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
Projectile-Charge Sign Dependence of Four-Particle Dynamics in Helium Double Ionization
Authors:Fischer, D.; Moshammer, R.; Dorn, A.; Crespo López-Urrutia, J.R.; Feuerstein, B.; Höhr, C.; Schröter, C.D.; Hagmann, S.; Kollmus, H.; Mann, R.; Bapat, B.; Ullrich, J.
Language:English
Date of Publication (YYYY-MM-DD):2003-06-20
Title of Journal:Physical Review Letters
Volume:90
Issue / Number:24
Start Page:1
End Page:4
Sequence Number of Article:243201
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Double ionization of helium by 6 MeV proton impact has been explored in a kinematically complete experiment using a "reaction microscope." For the first time, fully differential cross sections for positively charged projectiles have been obtained and compared with data from 2 keV electron impact. The significant differences observed in the angular distribution of the ejected electrons are attributed to the charge sign of the projectile, resulting in different dynamics of the four-particle Coulomb system, which is not considered in the first Born approximation.
Classification / Thesaurus:34.10.+x; 34.50.Fa
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group J. Ullrich/Strong-Fields Physics (R. Moshammer)
External Affiliations:Institut für Kernphysik, August-Euler Strasse 6, D-60486 Frankfurt, Germany
Gesellschaft für Schwerionenforschung, D-64220 Darmstadt, Germany
Physical Research Laboratory, Navrangpura, Ahmedabad-380 009, India
Identifiers:DOI:10.1103/PhysRevLett.90.243201
URL:http://link.aps.org/abstract/PRL/v90/e243201
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