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Dynamics of proton migration and dissociation in core-excited ethyne probed by multiple ion momentum imaging

In English

Författare

Summary, in English

The study focuses on the rapid geometry change in ethyne, excited near the carbon 1s edge. Core excitation and ionization leads to population of dicationic states in ethyne. We study three competing dissociation pathways associated with deprotonation in the linear ethyne molecule, and two cases of rapid proton migration. We investigate the alignment of the molecule in the excited state, and find startling differences in these three cases. We present evidence for a strong anisotropy in the production of H+2 /C+2 fragments through a rapid deformation of the molecule to a dibridged conformation with the transition dipole moment parallel to the polarization of the exciting radiation.

Publiceringsår

2009

Språk

Engelska

Sidor

1-244305

Publikation/Tidskrift/Serie

Journal of Chemical Physics

Volym

131

Issue

24

Dokumenttyp

Artikel i tidskrift

Förlag

American Institute of Physics (AIP)

Ämne

  • Atom and Molecular Physics and Optics

Nyckelord

  • synchrotron
  • ethyne
  • radiation
  • anisotropy
  • velocity
  • map
  • core
  • imaging
  • excitation

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0021-9606