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

ID: 441486.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
EUV-photon-induced multiple ionization and fragmentation dynamics: from atoms to molecules
Authors:Jiang, Y. H.; Rudenko, A.; Kurka, M.; Kühnel, K. U.; Foucar, L.; Ergler, T.; Lüdemann, S.; Zrost, K.; Ferger, T.; Fischer, D.; Dorn, A.; Titze, J.; Jahnke, T.; Schöffler, M.; Schössler, S.; Havermeier, T.; Smolarski, M.; Cole, K.; Dörner, R.; Zouros, T. J. M.; Düsterer, S.; Treusch, R.; Gensch, M.; Schröter, C. D.; Moshammer, R.; Ullrich, J.
Date of Publication (YYYY-MM-DD):2009-07-14
Title of Journal:Journal of Physics B: Atomic, Molecular and Optical Physics
Journal Abbrev.:J. Phys. B
Volume (in Journal):42
Issue / Number:13
Title of Issue:Special issue on attosecond and x-ry free-electron laser physics
Full Name of Issue-Editor(s):Robert Moshammer, Joachim Ullrich
Start Page:1
End Page:9
Sequence Number:134012
Name of Conference/Meeting:International Conference on Multi-Photon Processes (ICOMP08)
Place of Conference/Meeting:Heidelberg, Germany
(Start) Date of Conference/Meeting
End Date of Conference/Meeting 
Copyright:© Institute of Physics and IOP Publishing Limited 2009.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Multiple ionization (MI), induced by a few EUV photons at energies of 28.2 eV, 38 eV and 44 eV from FLASH (the free-electron laser at Hamburg), has been studied for atoms (He, Ne, Ar) and N2 molecules utilizing our multi-hit coincident technology—the reaction microscope. At comparably low intensities of I cong 1011–1013 W cm−2 we find the non-sequential (NS) MI mechanism dominating Ar3+ and Ar4+ production. Inspecting recoil ion and electron momentum distributions evidence is provided (i) for preferential back-to-back emission of electrons for NS double ionization of He and (ii) for angular entanglement between two outgoing electrons in sequential ionization (SI). In contrast to atoms, SI is observed to be most effective for MI of N2 molecules at an intensity of ~1013 W cm−2 leading, among others, to N2+2 → N+ + N+, N3+2 → N2+ + N+, N4+2 → N2+ + N2+ Coulomb explosion channels. Fragment ion momentum distributions are investigated and are demonstrated to allow tracing SI pathways.
External Publication Status:published
Document Type:Conference-Paper
Affiliations:MPI für Kernphysik/Group of J. Ullrich/Strong-Fields Physics (R. Moshammer)
External Affiliations:Max-Planck Advanced Study Group at CFEL, 22607 Hamburg, Germany
Institut für Kernphysik, Universität Frankfurt, 60486 Frankfurt, Germany
Department of Physics, University of Crete, PO Box 2208, 71003 Heraklion, Crete, Greece
DESY, Notkestrasse 85, 22607 Hamburg, Germany
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