Wavelength-dependent study of strong-field Coulomb explosion of hydrogen

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Title Wavelength-dependent study of strong-field Coulomb explosion of hydrogen
Author Litvinyuk, Igor; Alnaser, A.S.; Comtois, D.; Ray, D.; Hasan, A.T.; Kieffer, J-C.; Villenueve, D.M.
Journal Name New Journal of Physics
Year Published 2008
Place of publication Bristol, UK
Publisher IOP Publishing
Abstract We present the first systematic wavelength-dependent study of laser Coulomb explosion of deuterium molecules at various peak intensities and polarizations. We measured the kinetic energy spectra of D+ for laser wavelengths in the range 480-2000 nm. In addition to the well-known enhanced ionization channel present for all wavelengths, we observe a new high-energy band at short wavelengths. This new band exhibits wavelength dependence, with fragment energy decreasing with increasing wavelengths until it merges with the enhanced ionization band for 800 nm and longer. We attribute the emergence of this band to a new pathway that involves resonant three-photon coupling to the first excited electronic state of the molecular ion during the Coulomb explosion process. This pathway should be accounted for in controlling molecular dynamics of hydrogen by intense laser pulses.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1088/1367-2630/10/8/083011
Copyright Statement Copyright 2008 Institute of Physics Publishing. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 10
Page from 083011-1
Page to 083011-5
ISSN 1367-2630
Date Accessioned 2010-02-08
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
URI http://hdl.handle.net/10072/28983
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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