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Molecular alignment of ammonia studied by electron-ion-ion coincidence spectroscopy

Lindgren, Andreas LU ; Gisselbrecht, Mathieu LU ; Burmeister, F; de Brito, AN; Kivimäki, A and Ristinmaa Sörensen, Stacey LU (2005) In Journal of Chemical Physics 122(11).
Abstract
Electron-ion-ion coincidence measurements carried out at discrete resonances near the N 1s threshold in ammonia are reported. The measured coincidence spectra show clear alignment of the molecule upon resonant core-electron excitation. The coincidence data are analyzed to extract information about the molecule in the excited state by simulating the alignment and the dissociation processes. Dynamic changes in molecular geometry are found as the photon energy is scanned through the N 1s -> 4a(1) resonance, whereas for the N 1s -> 2e state the geometry and kinetic energy released upon dissociation remain unchanged. The alignment of the core-excited molecules is found to be preserved even in two-step dissociation processes.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Chemical Physics
volume
122
issue
11
publisher
American Institute of Physics
external identifiers
  • wos:000228389900024
  • scopus:18744400871
ISSN
0021-9606
DOI
10.1063/1.1861453
language
English
LU publication?
yes
id
b4280e3c-4b72-42ba-b7a1-5078524fa538 (old id 246476)
date added to LUP
2007-08-20 08:18:45
date last changed
2017-09-10 03:35:34
@article{b4280e3c-4b72-42ba-b7a1-5078524fa538,
  abstract     = {Electron-ion-ion coincidence measurements carried out at discrete resonances near the N 1s threshold in ammonia are reported. The measured coincidence spectra show clear alignment of the molecule upon resonant core-electron excitation. The coincidence data are analyzed to extract information about the molecule in the excited state by simulating the alignment and the dissociation processes. Dynamic changes in molecular geometry are found as the photon energy is scanned through the N 1s -> 4a(1) resonance, whereas for the N 1s -> 2e state the geometry and kinetic energy released upon dissociation remain unchanged. The alignment of the core-excited molecules is found to be preserved even in two-step dissociation processes.},
  articleno    = {114306},
  author       = {Lindgren, Andreas and Gisselbrecht, Mathieu and Burmeister, F and de Brito, AN and Kivimäki, A and Ristinmaa Sörensen, Stacey},
  issn         = {0021-9606},
  language     = {eng},
  number       = {11},
  publisher    = {American Institute of Physics},
  series       = {Journal of Chemical Physics},
  title        = {Molecular alignment of ammonia studied by electron-ion-ion coincidence spectroscopy},
  url          = {http://dx.doi.org/10.1063/1.1861453},
  volume       = {122},
  year         = {2005},
}