Three-dimensional momentum imaging of delayed dissociation of metastable molecular ions

POSTER

Abstract

Coincidence three-dimensional momentum imaging has been a powerful technique in studies of molecular fragmentation following ionization by ultrashort intense laser pulses, fast ion or electron impact, etc. On occasion, the fragmentation process of the intermediate molecular ion can be delayed by a significant fraction of the flight time to the detector due to the presence of metastable states. We focus on the signatures of delayed dissociation into an ion pair observed in coincidence spectra obtained using cold target recoil ion momentum spectrometry (COLTRIMS). Moreover, we present a method for recovering the complete 3D momenta of the dissociating fragments as well as the time delay of the dissociation. Laser-induced dissociation of hydrocarbon dications, for example C$_2$H$_4^{2+}$ $\rightarrow$ H$^+$ + C$_2$H$_3^+$, is used to demonstrate the method.

Authors

  • Y. Malakar

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

  • Bethany Jochim

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

  • Reid Erdwien

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

  • K. D. Carnes

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

  • W. L. Pearson

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

  • A. Rudenko

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

  • Itzik Ben-Itzhak

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