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Photon energy dependence of fragmentation of small argon clusters

Gisselbrecht, Mathieu LU ; Lindgren, Andreas LU ; Tchaplyguine, Maxim LU ; Burmeister, F; Ohrwall, G; Lundwall, M; Lundin, Magnus LU ; Marinho, RRT; de Brito, AN and Svensson, S, et al. (2005) In Journal of Chemical Physics 123(19).
Abstract
Photofragmentation of small argon clusters with size below ten atoms is reported. In this size range significant modifications from the electronic properties and geometry take place. When tuning the photon energy through the argon 2p edge, the fragmentation pattern is changed. Specifically, cation dimer production is enhanced at the 2p(3/2)-> 4s resonance, while above the 2p edge almost complete atomization is observed. In both cases, the widths of the peaks in the mass spectra indicate that a large amount of kinetic energy is imparted to the fragment due to the formation of multiply charged clusters. A model based on "Coulomb explosion"-charge separation, simply resulting in a complete atomization of the cluster with no dependence on... (More)
Photofragmentation of small argon clusters with size below ten atoms is reported. In this size range significant modifications from the electronic properties and geometry take place. When tuning the photon energy through the argon 2p edge, the fragmentation pattern is changed. Specifically, cation dimer production is enhanced at the 2p(3/2)-> 4s resonance, while above the 2p edge almost complete atomization is observed. In both cases, the widths of the peaks in the mass spectra indicate that a large amount of kinetic energy is imparted to the fragment due to the formation of multiply charged clusters. A model based on "Coulomb explosion"-charge separation, simply resulting in a complete atomization of the cluster with no dependence on the photon energy-is insufficient to explain the observed photofragmentation of small clusters. (Less)
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Journal of Chemical Physics
volume
123
issue
19
publisher
American Institute of Physics
external identifiers
  • wos:000233353200013
  • scopus:27744543456
ISSN
0021-9606
DOI
10.1063/1.2118527
language
English
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yes
id
51efa72e-60fc-4fda-b8be-22263741a4f9 (old id 213076)
date added to LUP
2007-08-22 09:38:53
date last changed
2017-07-30 03:52:46
@article{51efa72e-60fc-4fda-b8be-22263741a4f9,
  abstract     = {Photofragmentation of small argon clusters with size below ten atoms is reported. In this size range significant modifications from the electronic properties and geometry take place. When tuning the photon energy through the argon 2p edge, the fragmentation pattern is changed. Specifically, cation dimer production is enhanced at the 2p(3/2)-> 4s resonance, while above the 2p edge almost complete atomization is observed. In both cases, the widths of the peaks in the mass spectra indicate that a large amount of kinetic energy is imparted to the fragment due to the formation of multiply charged clusters. A model based on "Coulomb explosion"-charge separation, simply resulting in a complete atomization of the cluster with no dependence on the photon energy-is insufficient to explain the observed photofragmentation of small clusters.},
  articleno    = {194301},
  author       = {Gisselbrecht, Mathieu and Lindgren, Andreas and Tchaplyguine, Maxim and Burmeister, F and Ohrwall, G and Lundwall, M and Lundin, Magnus and Marinho, RRT and de Brito, AN and Svensson, S and Bjorneholm, O and Ristinmaa Sörensen, Stacey},
  issn         = {0021-9606},
  language     = {eng},
  number       = {19},
  publisher    = {American Institute of Physics},
  series       = {Journal of Chemical Physics},
  title        = {Photon energy dependence of fragmentation of small argon clusters},
  url          = {http://dx.doi.org/10.1063/1.2118527},
  volume       = {123},
  year         = {2005},
}