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



ID: 60296.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
Separation of Recollision Mechanisms in Non-Sequential Strong Field Double Ionization of Ar: The Role of Excitation-Tunneling
Authors:Feuerstein, B.; Moshammer, R.; Fischer, D.; Dorn, A.; Schröter, C.D.; Deipenwisch, J.; Crespo López-Urrutia, J.; Höhr, C.; Neumayer, P.; Ullrich, J.; Rottke, H.; Trump, C.; Wittmann, M.; Korn, G.; Sandner, W.
Language:English
Date of Publication (YYYY-MM-DD):2001-07-09
Title of Journal:Physical Review Letters
Volume:87
Start Page:1
End Page:4
Sequence Number of Article:043003-1
Copyright:©2001 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Vector momentum distributions of two electrons created in double ionization of Ar by 25 fs, 0.25 PW/cm2 laser pulses at 795 nm have been measured using a "reaction microscope." At this intensity, where nonsequential ionization dominates, distinct correlation patterns are observed in the two-electron momentum distributions. A kinematical analysis of these spectra within the classical "recollision model" revealed an (e, 2e)-like process and excitation with subsequent tunneling of the second electron as two different ionization mechanisms. This allows a qualitative separation of the two mechanisms demonstrating that excitation-tunneling is the dominant contribution to the total double ionization yield.
Classification / Thesaurus:32.80.Rm, 31.90.+s, 32.80.Fb
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group J. Ullrich/Strong-Fields Physics (R. Moshammer)
External Affiliations:Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany
Gesellschaft für Schwerionenforschung (GSI), D-64291 Darmstadt, Germany
Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin, Germany
Identifiers:URL:http://link.aps.org/abstract/PRL/v87/e043003
DOI:10.1103/PhysRevLett.87.043003
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