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Open Access Publications from the University of California

Electron Localization in Dissociating H_{2}^{+} by Retroaction of a Photoelectron onto Its Source.

  • Author(s): Waitz, M
  • Aslitürk, D
  • Wechselberger, N
  • Gill, HK
  • Rist, J
  • Wiegandt, F
  • Goihl, C
  • Kastirke, G
  • Weller, M
  • Bauer, T
  • Metz, D
  • Sturm, FP
  • Voigtsberger, J
  • Zeller, S
  • Trinter, F
  • Schiwietz, G
  • Weber, T
  • Williams, JB
  • Schöffler, MS
  • Schmidt, L Ph H
  • Jahnke, T
  • Dörner, R
  • et al.

We investigate the dissociation of H_{2}^{+} into a proton and a H^{0} after single ionization with photons of an energy close to the threshold. We find that the p^{+} and the H^{0} do not emerge symmetrically in the case of the H_{2}^{+} dissociating along the 1sσ_{g} ground state. Instead, a preference for the ejection of the p^{+} in the direction of the escaping photoelectron can be observed. This symmetry breaking is strongest for very small electron energies. Our experiment is consistent with a recent prediction by Serov and Kheifets [Phys. Rev. A 89, 031402 (2014)]. In their model, which treats the photoelectron classically, the symmetry breaking is induced by the retroaction of the long-range Coulomb potential onto the dissociating H_{2}^{+}.

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