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Tracing charge transfer in argon dimers by XUV-pump IR-probe experiments at FLASH
- Source :
- Journal of Chemical Physics, Journal of Chemical Physics, American Institute of Physics, 2019, 151 (8), pp.084314. ⟨10.1063/5.0009264⟩, The journal of chemical physics 151(8), 084314-(2019). doi:10.1063/1.5116234
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
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 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.
- Subjects :
- Materials science
Population
General Physics and Astronomy
chemistry.chemical_element
010402 general chemistry
7. Clean energy
01 natural sciences
law.invention
Ion
Optical pumping
law
Ionization
0103 physical sciences
Physics::Atomic and Molecular Clusters
ddc:530
Physical and Theoretical Chemistry
education
ComputingMilieux_MISCELLANEOUS
education.field_of_study
Argon
010304 chemical physics
[PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus]
Coulomb explosion
Laser
3. Good health
0104 chemical sciences
chemistry
Excited state
Atomic physics
Subjects
Details
- Language :
- English
- ISSN :
- 00219606 and 10897690
- Database :
- OpenAIRE
- Journal :
- Journal of Chemical Physics, Journal of Chemical Physics, American Institute of Physics, 2019, 151 (8), pp.084314. ⟨10.1063/5.0009264⟩, The journal of chemical physics 151(8), 084314-(2019). doi:10.1063/1.5116234
- Accession number :
- edsair.doi.dedup.....ef4337c6542c732cfc581153fa2cfa8a