Strong Field Ionization to Multiple Electronic States in Water
| Autor: | Piero Decleva, Limor S. Spector, Johann Förster, Alejandro Saenz, J. P. Farrell, Yulian V. Vanne, Simon Petretti, Brian K. McFarland, Markus Gühr, Philip H. Bucksbaum |
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| Přispěvatelé: | Joseph, Farrell, Simon, Petretti, Johann, Förster, Brian, Mcfarland, Limor, Spector, Yulian, Vanne, Decleva, Pietro, Philip, Bucksbaum, Alejandro, Saenz, Markus, Gühr |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Atomic Physics (physics.atom-ph) General Physics and Astronomy Ionic bonding FOS: Physical sciences strong field ionization Spectral line Physics - Atomic Physics Ionization Excited state Kinetic isotope effect Physics::Atomic and Molecular Clusters High harmonic generation Physics::Atomic Physics Atomic physics HOMO/LUMO Self-ionization of water |
| Popis: | High harmonic spectra show that laser-induced strong field ionization of water has a significant contribution from an inner-valence orbital. Our experiment uses the ratio of ${\mathrm{H}}_{2}\mathrm{O}$ and ${\mathrm{D}}_{2}\mathrm{O}$ high harmonic yields to isolate the characteristic nuclear motion of the molecular ionic states. The nuclear motion initiated via ionization of the highest occupied molecular orbital (HOMO) is small and is expected to lead to similar harmonic yields for the two isotopes. In contrast, ionization of the second least bound orbital (HOMO-1) exhibits itself via a strong bending motion which creates a significant isotope effect. We elaborate on this interpretation by solving the time-dependent Schr\"odinger equation to simulate strong field ionization and high harmonic generation from the water isotopes. We expect that this isotope marking scheme for probing excited ionic states in strong field processes can be generalized to other molecules. |
| Databáze: | OpenAIRE |
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