Tracing charge transfer in argon dimers by XUV-pump IR-probe experiments at FLASH
(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.
(Less)
- author
- organization
- publishing date
- 2019-08-28
- 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
- 2024-06-26 02:53:22
@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}}, }