Dynamic modification of the fragmentation of autoionizing excited states of O$_{2}^{+}$

POSTER

Abstract

The dynamic process of fragmentation of excited states of molecular oxygen is investigated in a two-part study. First, using monochromatic 41 eV radiation and COLTRIMS detection of O+/O+ ion pairs and associated electrons, we establish that this channel is populated only by an indirect process enabled by autoionization of excited oxygen neutrals, and identify the final active molecular states involved. Second, we probe the dynamics of this process using an attosecond pulse train of 35-42 eV EUV, followed by an intense laser pulse (5.10$^{11}$ W/cm$^{2})$. A model gives qualitative agreement with experiment.Supported by Chem. Sci. DOE DE-FG02-86ER1349, NSF CHE-0822646 and USARO W911NF-07-0475

Authors

  • W. Cao

  • Guillaume Laurent

    J.R. Macdonald Laboratory, Physics Dept, Kansas State University

  • S. De

  • M. Schoeffler

  • T. Jahnke

  • A. Alnaser

  • I. Bocharova

  • C. Stuck

  • D. Ray

  • M. Kling

    Max-Planck-Institut fuer Quantenoptik, Germany, Max Planck Institut of Quantum Optics, Garching, Germany \& J.R. Macdonald Laboratory, Kansas-State University, KS, USA

  • Itzik Ben-Itzhak

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

  • T. Weber

  • A. Landers

    Auburn University

  • Ali Belkacem

  • R. Doerner

  • Lew Cocke

    J.R. Macdonald Laboratory, Physics Dept, Kansas State University