Dynamics of proton migration and dissociation in core-excited ethyne probed by multiple ion momentum imaging
(2009) In Journal of Chemical Physics 131(24). p.1-244305- Abstract
- 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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1528257
- author
- Laksman, Joakim
LU
; Céolin, Denis
LU
; Gisselbrecht, Mathieu
LU
; Canton, Sophie LU and Ristinmaa Sörensen, Stacey LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- synchrotron, ethyne, radiation, anisotropy, velocity, map, core, imaging, excitation
- in
- Journal of Chemical Physics
- volume
- 131
- issue
- 24
- pages
- 1 - 244305
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000273217000029
- scopus:73649098289
- pmid:20059071
- ISSN
- 0021-9606
- DOI
- 10.1063/1.3270159
- language
- English
- LU publication?
- yes
- id
- cee9659d-06d0-4316-b074-6cbc289b96ab (old id 1528257)
- date added to LUP
- 2016-04-01 12:12:23
- date last changed
- 2025-04-04 14:27:15
@article{cee9659d-06d0-4316-b074-6cbc289b96ab, abstract = {{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.}}, author = {{Laksman, Joakim and Céolin, Denis and Gisselbrecht, Mathieu and Canton, Sophie and Ristinmaa Sörensen, Stacey}}, issn = {{0021-9606}}, keywords = {{synchrotron; ethyne; radiation; anisotropy; velocity; map; core; imaging; excitation}}, language = {{eng}}, number = {{24}}, pages = {{1--244305}}, publisher = {{American Institute of Physics (AIP)}}, series = {{Journal of Chemical Physics}}, title = {{Dynamics of proton migration and dissociation in core-excited ethyne probed by multiple ion momentum imaging}}, url = {{https://lup.lub.lu.se/search/files/2826356/1528260.pdf}}, doi = {{10.1063/1.3270159}}, volume = {{131}}, year = {{2009}}, }