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Tracing charge transfer in argon dimers by XUV-pump IR-probe experiments at FLASH

Schmid, Georg ; Schnorr, Kirsten ; Augustin, Sven ; Meister, Severin ; Lindenblatt, Hannes ; Trost, Florian ; Liu, Yifan ; Miteva, Tsveta ; Gisselbrecht, Mathieu LU orcid and Düsterer, Stefan , et al. (2019) In Journal of Chemical Physics 151(8).
Abstract

Charge transfer (CT) at avoided crossings of excited ionized states of argon dimers is observed using a two-color pump-probe experiment at the free-electron laser in Hamburg (FLASH). The process is initiated by the absorption of three 27-eV-photons from the pump pulse, which leads to the population of Ar2+*-Ar states. Due to nonadiabatic coupling between these one-site doubly ionized states and two-site doubly ionized states of the type Ar+*-Ar+, CT can take place leading to the population of the latter states. The onset of this process is probed by a delayed infrared (800 nm) laser pulse. The latter ionizes the dimers populating repulsive Ar2+ -Ar+ states, which then undergo a... (More)

Charge transfer (CT) at avoided crossings of excited ionized states of argon dimers is observed using a two-color pump-probe experiment at the free-electron laser in Hamburg (FLASH). The process is initiated by the absorption of three 27-eV-photons from the pump pulse, which leads to the population of Ar2+*-Ar states. Due to nonadiabatic coupling between these one-site doubly ionized states and two-site doubly ionized states of the type Ar+*-Ar+, CT can take place leading to the population of the latter states. The onset of this process is probed by a delayed infrared (800 nm) laser pulse. The latter ionizes the dimers populating repulsive Ar2+ -Ar+ states, which then undergo a Coulomb explosion. From the delay-dependent yields of the obtained Ar2+ and Ar+ ions, the lifetime of the charge-transfer process is extracted. The obtained experimental value of (531 ± 136) fs agrees well with the theoretical value computed from Landau-Zener probabilities.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Chemical Physics
volume
151
issue
8
article number
084314
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85071748258
  • pmid:31470702
ISSN
0021-9606
DOI
10.1063/1.5116234
language
English
LU publication?
yes
id
3651190f-66e0-47d1-8f1b-d6fc7540d0b4
date added to LUP
2019-09-18 12:10:28
date last changed
2024-06-27 05:23:07
@article{3651190f-66e0-47d1-8f1b-d6fc7540d0b4,
  abstract     = {{<p>Charge transfer (CT) at avoided crossings of excited ionized states of argon dimers is observed using a two-color pump-probe experiment at the free-electron laser in Hamburg (FLASH). The process is initiated by the absorption of three 27-eV-photons from the pump pulse, which leads to the population of Ar<sup>2+*</sup>-Ar states. Due to nonadiabatic coupling between these one-site doubly ionized states and two-site doubly ionized states of the type Ar<sup>+*</sup>-Ar<sup>+</sup>, CT can take place leading to the population of the latter states. The onset of this process is probed by a delayed infrared (800 nm) laser pulse. The latter ionizes the dimers populating repulsive Ar<sup>2+</sup> -Ar<sup>+</sup> states, which then undergo a Coulomb explosion. From the delay-dependent yields of the obtained Ar<sup>2+</sup> and Ar<sup>+</sup> ions, the lifetime of the charge-transfer process is extracted. The obtained experimental value of (531 ± 136) fs agrees well with the theoretical value computed from Landau-Zener probabilities.</p>}},
  author       = {{Schmid, Georg and Schnorr, Kirsten and Augustin, Sven and Meister, Severin and Lindenblatt, Hannes and Trost, Florian and Liu, Yifan and Miteva, Tsveta and Gisselbrecht, Mathieu and Düsterer, Stefan and Redlin, Harald and Treusch, Rolf and Gokhberg, Kirill and Kuleff, Alexander I. and Cederbaum, Lorenz S. and Schröter, Claus Dieter and Pfeifer, Thomas and Moshammer, Robert}},
  issn         = {{0021-9606}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{8}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Journal of Chemical Physics}},
  title        = {{Tracing charge transfer in argon dimers by XUV-pump IR-probe experiments at FLASH}},
  url          = {{http://dx.doi.org/10.1063/1.5116234}},
  doi          = {{10.1063/1.5116234}},
  volume       = {{151}},
  year         = {{2019}},
}