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Coulomb explosion of diatomic molecules in intense XUV fields mapped by partial covariance

Kornilov, O.; Eckstein, M.; Rosenblatt, M.; Schulz, C. P.; Motomura, K.; Rouzee, A.; Klei, J.; Foucar, L.; Siano, M. and Luebcke, A., et al. (2013) In Journal of Physics B: Atomic, Molecular and Optical Physics 46(16).
Abstract
Single-shot time-of-flight spectra for Coulomb explosion of N-2 and I-2 molecules have been recorded at the Free Electron LASer in Hamburg (FLASH) and have been analysed using a partial covariance mapping technique. The partial covariance analysis unravels a detailed picture of all significant Coulomb explosion pathways, extending up to the N4+-N5+ channel for nitrogen and up to the I8+-I9+ channel for iodine. The observation of the latter channel is unexpected if only sequential ionization processes from the ground state ions are considered. The maximum kinetic energy release extracted from the covariance maps for each dissociation channel shows that Coulomb explosion of nitrogen molecules proceeds much faster than that of the iodine. The... (More)
Single-shot time-of-flight spectra for Coulomb explosion of N-2 and I-2 molecules have been recorded at the Free Electron LASer in Hamburg (FLASH) and have been analysed using a partial covariance mapping technique. The partial covariance analysis unravels a detailed picture of all significant Coulomb explosion pathways, extending up to the N4+-N5+ channel for nitrogen and up to the I8+-I9+ channel for iodine. The observation of the latter channel is unexpected if only sequential ionization processes from the ground state ions are considered. The maximum kinetic energy release extracted from the covariance maps for each dissociation channel shows that Coulomb explosion of nitrogen molecules proceeds much faster than that of the iodine. The N-2 ionization dynamics is modelled using classical trajectory simulations in good agreement with the outcome of the experiments. The results suggest that covariance mapping of the Coulomb explosion can be used to measure the intensity and pulse duration of free-electron lasers. (Less)
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publication status
published
subject
in
Journal of Physics B: Atomic, Molecular and Optical Physics
volume
46
issue
16
publisher
IOP Publishing
external identifiers
  • wos:000323113100029
  • scopus:84883194878
ISSN
0953-4075
DOI
10.1088/0953-4075/46/16/164028
language
English
LU publication?
yes
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ffe18b2f-13a1-481e-a4af-4d75099067d5 (old id 4172297)
date added to LUP
2013-11-21 14:16:24
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2019-05-23 02:20:19
@article{ffe18b2f-13a1-481e-a4af-4d75099067d5,
  abstract     = {Single-shot time-of-flight spectra for Coulomb explosion of N-2 and I-2 molecules have been recorded at the Free Electron LASer in Hamburg (FLASH) and have been analysed using a partial covariance mapping technique. The partial covariance analysis unravels a detailed picture of all significant Coulomb explosion pathways, extending up to the N4+-N5+ channel for nitrogen and up to the I8+-I9+ channel for iodine. The observation of the latter channel is unexpected if only sequential ionization processes from the ground state ions are considered. The maximum kinetic energy release extracted from the covariance maps for each dissociation channel shows that Coulomb explosion of nitrogen molecules proceeds much faster than that of the iodine. The N-2 ionization dynamics is modelled using classical trajectory simulations in good agreement with the outcome of the experiments. The results suggest that covariance mapping of the Coulomb explosion can be used to measure the intensity and pulse duration of free-electron lasers.},
  articleno    = {164028},
  author       = {Kornilov, O. and Eckstein, M. and Rosenblatt, M. and Schulz, C. P. and Motomura, K. and Rouzee, A. and Klei, J. and Foucar, L. and Siano, M. and Luebcke, A. and Schapper, F. and Johnsson, Per and Holland, D. M. P. and Schlathoelter, T. and Marchenko, T. and Duesterer, S. and Ueda, K. and Vrakking, M. J. J. and Frasinski, L. J.},
  issn         = {0953-4075},
  language     = {eng},
  number       = {16},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics B: Atomic, Molecular and Optical Physics},
  title        = {Coulomb explosion of diatomic molecules in intense XUV fields mapped by partial covariance},
  url          = {http://dx.doi.org/10.1088/0953-4075/46/16/164028},
  volume       = {46},
  year         = {2013},
}