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Size dependent fragmentation of argon clusters in the soft x-ray ionization regime.

Gisselbrecht, Mathieu LU ; Lindgren, Andreas LU ; Burmeister, Florian; Tchaplyguine, Maxim LU ; Ohrwall, Gunnar; Lundin, Magnus LU ; de Brito, Arnaldo Naves; Svensson, Svante; Björneholm, Olle and Ristinmaa Sörensen, Stacey LU (2008) In Journal of Chemical Physics 128(4).
Abstract
Photofragmentation of argon clusters of average size ranging from 10 up to 1000 atoms is studied using soft x-ray radiation below the 2p threshold and multicoincidence mass spectroscopy technique. For small clusters (N=10), ionization induces fast fragmentation with neutral emission imparting a large amount of energy. While the primary dissociation takes place on a picosecond time scale, the fragments undergo slow degradation in the spectrometer on a microsecond time scale. For larger clusters (N>/=100) we believe that we observe the fragmentation pattern of multiply charged species on a time-scale which lasts a few hundred nanoseconds. The reason for these slower processes is the large number of neutral atoms which act as an efficient... (More)
Photofragmentation of argon clusters of average size ranging from 10 up to 1000 atoms is studied using soft x-ray radiation below the 2p threshold and multicoincidence mass spectroscopy technique. For small clusters (N=10), ionization induces fast fragmentation with neutral emission imparting a large amount of energy. While the primary dissociation takes place on a picosecond time scale, the fragments undergo slow degradation in the spectrometer on a microsecond time scale. For larger clusters (N>/=100) we believe that we observe the fragmentation pattern of multiply charged species on a time-scale which lasts a few hundred nanoseconds. The reason for these slower processes is the large number of neutral atoms which act as an efficient cooling bath where the excess energy ("heat") dissipates among all degrees of freedom. Further degradation of the photoionic cluster in spectrometer then takes place on the microsecond time scale, similar to small clusters. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Chemical Physics
volume
128
issue
4
publisher
American Institute of Physics
external identifiers
  • pmid:18247959
  • wos:000252821200040
  • scopus:38849153646
ISSN
0021-9606
DOI
10.1063/1.2821748
language
English
LU publication?
yes
id
16681ef1-0e93-45a6-8f1a-acb2153df248 (old id 1042263)
date added to LUP
2008-03-25 17:34:13
date last changed
2017-01-01 04:24:52
@article{16681ef1-0e93-45a6-8f1a-acb2153df248,
  abstract     = {Photofragmentation of argon clusters of average size ranging from 10 up to 1000 atoms is studied using soft x-ray radiation below the 2p threshold and multicoincidence mass spectroscopy technique. For small clusters (N=10), ionization induces fast fragmentation with neutral emission imparting a large amount of energy. While the primary dissociation takes place on a picosecond time scale, the fragments undergo slow degradation in the spectrometer on a microsecond time scale. For larger clusters (N>/=100) we believe that we observe the fragmentation pattern of multiply charged species on a time-scale which lasts a few hundred nanoseconds. The reason for these slower processes is the large number of neutral atoms which act as an efficient cooling bath where the excess energy ("heat") dissipates among all degrees of freedom. Further degradation of the photoionic cluster in spectrometer then takes place on the microsecond time scale, similar to small clusters.},
  articleno    = {044317},
  author       = {Gisselbrecht, Mathieu and Lindgren, Andreas and Burmeister, Florian and Tchaplyguine, Maxim and Ohrwall, Gunnar and Lundin, Magnus and de Brito, Arnaldo Naves and Svensson, Svante and Björneholm, Olle and Ristinmaa Sörensen, Stacey},
  issn         = {0021-9606},
  language     = {eng},
  number       = {4},
  publisher    = {American Institute of Physics},
  series       = {Journal of Chemical Physics},
  title        = {Size dependent fragmentation of argon clusters in the soft x-ray ionization regime.},
  url          = {http://dx.doi.org/10.1063/1.2821748},
  volume       = {128},
  year         = {2008},
}