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Partial cation and anion-yield experiments in ammonia around the N 1s ionization threshold

Piancastelli, M. N.; Guillemin, R.; Stolte, W. C.; Céolin, Denis LU and Lindle, D. W. (2007) In Journal of Electron Spectroscopy and Related Phenomena 155(1-3). p.86-90
Abstract
We report partial cation and anion-yield measurements around the N K edge in isolated ammonia molecules. Due to the dominance of spectator electronic decay following Rydberg excitations, fragmentation was found to be more extensive following excitation to intermediate states of Rydberg character compared to excitation of states with molecular-orbital character. Unusual stability of the NH32+ fragment produced directly above threshold by normal-Auger decay is attributed to a stable planar geometry induced by a specific electronic configuration. Hydrogen anions are not detected above threshold except following the decay of resonant doubly excited neutral states embedded in the K-shell ionization continuum.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cations, photofragmentation, anions, photoexcitation
in
Journal of Electron Spectroscopy and Related Phenomena
volume
155
issue
1-3
pages
86 - 90
publisher
Elsevier
external identifiers
  • wos:000245493900016
  • scopus:33847622956
ISSN
0368-2048
DOI
10.1016/j.elspec.2006.11.009
language
English
LU publication?
yes
id
0e808079-7f22-4b5e-9cea-dc2601f1f81c (old id 667501)
date added to LUP
2007-12-14 08:54:02
date last changed
2017-09-17 07:37:37
@article{0e808079-7f22-4b5e-9cea-dc2601f1f81c,
  abstract     = {We report partial cation and anion-yield measurements around the N K edge in isolated ammonia molecules. Due to the dominance of spectator electronic decay following Rydberg excitations, fragmentation was found to be more extensive following excitation to intermediate states of Rydberg character compared to excitation of states with molecular-orbital character. Unusual stability of the NH32+ fragment produced directly above threshold by normal-Auger decay is attributed to a stable planar geometry induced by a specific electronic configuration. Hydrogen anions are not detected above threshold except following the decay of resonant doubly excited neutral states embedded in the K-shell ionization continuum.},
  author       = {Piancastelli, M. N. and Guillemin, R. and Stolte, W. C. and Céolin, Denis and Lindle, D. W.},
  issn         = {0368-2048},
  keyword      = {cations,photofragmentation,anions,photoexcitation},
  language     = {eng},
  number       = {1-3},
  pages        = {86--90},
  publisher    = {Elsevier},
  series       = {Journal of Electron Spectroscopy and Related Phenomena},
  title        = {Partial cation and anion-yield experiments in ammonia around the N 1s ionization threshold},
  url          = {http://dx.doi.org/10.1016/j.elspec.2006.11.009},
  volume       = {155},
  year         = {2007},
}