Vibrationally resolved strong-field dissociation of D2+ in ion beams

Domagoj Pavičić, Theodor W. Hänsch, and Hartmut Figger
Phys. Rev. A 72, 053413 – Published 22 November 2005

Abstract

Photodissociation of D2+ molecular ions in a beam from an ion source has been studied with 785nm intense femtosecond laser pulses. Using a high-resolution velocity imaging technique, the neutral fragments from single vibrational levels of the D2+ molecules have been resolved. The effects of one- and net two-photon bond softening: level shifting, vibrational trapping, and molecular alignment are observed in the kinetic energy and angular distributions and are discussed in detail. In comparison with our previous study on H2+, we observe smaller widths of the peaks in the kinetic energy distributions of the D2+ fragments from single vibrational levels. We attribute this to the longer lifetimes of D2+ vibrational states in the light-induced potentials. The width of the angular distributions increases for lowest fragment energies, which suggests vibrational trapping of the levels close to the three-photon crossing.

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  • Received 31 August 2005

DOI:https://doi.org/10.1103/PhysRevA.72.053413

©2005 American Physical Society

Authors & Affiliations

Domagoj Pavičić*, Theodor W. Hänsch, and Hartmut Figger

  • Max-Planck-Institut für Quantenoptik, Hans-Kopfermannstrasse 1, 85748 Garching, Germany

  • *Present address: National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6. Electronic address: Domagoj.Pavicic@nrc.ca
  • Electronic address: Hartmut.Figger@mpq.mpg.de

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Issue

Vol. 72, Iss. 5 — November 2005

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