Asymmetric electron emission patterns in H<sub>2</sub> &amp; D<sub>2 </sub>after VUV + NIR photoabsorption

ORAL

Abstract

Using the COLTRIMS technique, we investigated the dissociation of vibrationally excited H2 and D2 molecules after 2-color (VUV + NIR) absorption. The Advanced Light Source synchrotron provided VUV radiation to photoionize H2 (D2), leaving H2+ (D2+) ions in specific vibrational states. A synchronized 1030-nm NIR 12 ps laser pulse then dissociated these ions at a controlled time delay. We report on electron emission in the molecular frame, retrieved from the recoil ion lab-frame momentum, and its dependance on the orientation of the VUV and NIR polarizations. For some vibrational states, we observed an asymmetric photoelectron angular distribution that depends on the VUV/IR time delay. This asymmetry could be related to photoelectron retroaction with the dissociating ion.

*This research was supported by U.S DOE, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences

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Presenters

  • Spenser J Burrows

    • Auburn University

Authors

  • Spenser J Burrows

    • Auburn University

  • Itzik Ben-Itzhak

    • Kansas State University
    • J.R. Macdonald Laboratory, Physics, Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA

  • Benjamin Berry

    • Kansas State University

  • Elio G Champenois

    • University of California, Berkeley

  • Reinhard Doerner

    • Goethe University Frankfurt

  • Jan Dvorak

    • Lawrence Berkeley National Laboratory

  • Averell S Gatton

    • Auburn University

  • Wael Iskander

    • Lawrence Berkeley National Laboratory

  • Kirk A Larsen

    • University of California, Berkeley

  • Guillaume M Laurent

    • Auburn University

  • Robert R Lucchese

    • Lawrence Berkeley National Laboratory
    • LBL
    • Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA

  • William McCurdy

    • University of California, Davis
    • U. C. Davis and Lawrence Berkeley National Laboratory

  • Daniel Metz

    • Goethe University Frankfurt

  • Thomas N Rescigno

    • Lawrence Berkeley National Laboratory
    • Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA

  • Hendrik Sann

    • Goethe University Frankfurt

  • Travis Severt

    • Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA

  • Niranjan Shivaram

    • Purdue University

  • Daniel S Slaughter

    • Lawrence Berkeley National Laboratory
    • Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA

  • Miriam Weller

    • Goethe University Frankfurt

  • Joshua B Williams

    • University of Nevada, Reno
    • Department of Physics, University of Nevada, Reno, NV 89557 USA

  • Thorsten Weber

    • Lawrence Berkeley National Laboratory