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

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...

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Main Authors: Schmid, Georg (Author) , Schnorr, Kirsten (Author) , Augustin, Sven (Author) , Meister, Severin (Author) , Lindenblatt, Hannes (Author) , Trost, Florian (Author) , Liu, Yifan (Author) , Miteva, Tsveta (Author) , Gisselbrecht, Mathieu (Author) , Düsterer, Stefan (Author) , Redlin, Harald (Author) , Treusch, Rolf (Author) , Gokhberg, Kirill (Author) , Kuleff, Alexander I. (Author) , Cederbaum, Lorenz S. (Author) , Schröter, Claus D. (Author) , Pfeifer, Thomas (Author) , Moshammer, Robert (Author)
Format: Article (Journal)
Language:English
Published: 30 August 2019
In: The journal of chemical physics
Year: 2019, Volume: 151, Issue: 8
ISSN:1089-7690
DOI:10.1063/1.5116234
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1063/1.5116234
Verlag, lizenzpflichtig, Volltext: https://aip.scitation.org/doi/10.1063/1.5116234
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Author Notes:Georg Schmid, Kirsten Schnorr, Sven Augustin, Severin Meister, Hannes Lindenblatt, Florian Trost, Yifan Liu, Tsveta Miteva, Mathieu Gisselbrecht, Stefan Düsterer, Harald Redlin, Rolf Treusch, Kirill Gokhberg, Alexander I. Kuleff, Lorenz S. Cederbaum, Claus Dieter Schröter, Thomas Pfeifer, and Robert Moshammer
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Summary: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.
Item Description:Gesehen am 15.04.2020
Physical Description:Online Resource
ISSN:1089-7690
DOI:10.1063/1.5116234

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