Angular dependence of the strong-field ionization measured in randomly oriented hydrogen molecules

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Title Angular dependence of the strong-field ionization measured in randomly oriented hydrogen molecules
Author Magrakvelidze, Maia; He, Feng; De, Sankar; Bocharova, Irina; Ray, Dipanwita; Thumm, Uwe; Litvinyuk, Igor
Journal Name Physical Review A
Year Published 2009
Place of publication United States
Publisher American Physical Society
Abstract We employed electron-ion coincidence momentum spectroscopy to measure the relative angle between an emitted electron and a deuteron resulting from field dissociation of the molecular ion produced by a circularly polarized pulse. We deduced the angular dependence of the molecular ionization probability without having to align the molecules first. We determined that with 50 fs pulses of 1850 nm wavelength and 2x10(14) W/cm(2) intensity neutral D-2 molecules are 1.15 times more likely to be ionized when the laser electric field is parallel to the molecular axis than for the perpendicular orientation, in excellent agreement with our ab initio theoretical model. Our results also agree with predictions of the molecular Ammosov-Delone-Krainov (mo-ADK) theory, as well as those of a similar experiment performed with 800 nm pulses of comparable intensity and duration on H-2 molecules.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2009 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 79
Issue Number 3
Page from 033408-1
Page to 033408-4
ISSN 1050-2947
Date Accessioned 2009-11-13
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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