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  Laser control over the ultrafast Coulomb explosion of N22+ after Auger decay: A quantum-dynamics investigation

Hanna, A. M., Vendrell, O., Ourmazd, A., & Santra, R. (2017). Laser control over the ultrafast Coulomb explosion of N22+ after Auger decay: A quantum-dynamics investigation. Physical Review A, 95(4): 043419. doi:10.1103/PhysRevA.95.043419.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-3B2D-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-90AB-8
Genre: Journal Article

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PhysRevA.95.043419.pdf (Publisher version), 648KB
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https://doi.org/10.1103/PhysRevA.95.043419 (Publisher version)
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 Creators:
Hanna, Athiya M.1, 2, 3, Author              
Vendrell, Oriol2, 4, 5, Author
Ourmazd, Abbas6, Author
Santra, Robin2, 3, 4, 7, Author
Affiliations:
1International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
2Center for Free-Electron Laser Science, DESY, Notkestraße 85, D-22607 Hamburg, Germany, ou_persistent22              
3Department of Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany, ou_persistent22              
4Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany, ou_persistent22              
5Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark, ou_persistent22              
6Department of Physics, University of Wisconsin Milwaukee, 3135 N. Maryland Ave, Milwaukee, Wisconsin 53211, USA, ou_persistent22              
7Department of Physics, University of Hamburg, Jungiusstraße 9, D-20355 Hamburg, Germany, ou_persistent22              

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 Abstract: By theoretical calculation, we demonstrate the possibility to control and partially suppress the Coulomb explosion of N2 molecules after core-level photoionization by an x-ray laser and subsequent Auger decay. This is achieved by means of a femtosecond infrared laser pulse interacting with the N22+ dication produced by the x-ray pulse. Suppression of molecular fragmentation requires few-femtosecond IR pulses interacting with the system either during or shortly after the arrival of the x-ray pulse. The IR pulse suppresses fragmentation mostly by optically coupling the electronic routes to ultrafast molecular dissociation with electronic channels able to support long-lived vibrational resonances. The effect is strongly dependent on the orientation of the molecule with respect to the polarization axis of the IR field. Our calculations are motivated by x-ray pump–IR probe experiments performed at an x-ray free-electron laser [J. M. Glownia et al., Opt. Express 18, 17620 (2010)], where only enhancement of N22+ fragmentation as a function of the pump-probe delay time was reported. The opposite effect reported here becomes apparent when the various electronic channels are considered separately. In practice, this corresponds to a coincident measurement of the energy of the ejected Auger electron.

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Language(s): eng - English
 Dates: 2016-12-232017-04-24
 Publication Status: Published in print
 Pages: 10
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevA.95.043419
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Title: Physical Review A
  Other : Phys. Rev. A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 95 (4) Sequence Number: 043419 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2