Weak-field few-femtosecond VUV photodissociation dynamics of water isotopologues
| Autor: | Sophia Bazzi, Arne Baumann, Marek Wieland, Oliver Schepp, Robin Santra, Markus Drescher, Oriol Vendrell, Daria Popova-Gorelova, Dimitrios Rompotis, Armin Azima |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Photon
DISSOCIATION DYNAMICS Ab initio Photoionization Kinetic energy 01 natural sciences BOND BREAKING HOD MOLECULES Ionization 0103 physical sciences Kinetic isotope effect Physics::Atomic and Molecular Clusters H2O Isotopologue ddc:530 010306 general physics POTENTIAL-ENERGY SURFACES BASIS-SETS Physics SPECTROSCOPY 010304 chemical physics 1ST ABSORPTION-BAND STATE Excited state Atomic physics |
| Zdroj: | Baumann, A, Bazzi, S, Rompotis, D, Schepp, O, Azima, A, Wieland, M, Popova-Gorelova, D, Vendrell, O, Santra, R & Drescher, M 2017, ' Weak-field few-femtosecond VUV photodissociation dynamics of water isotopologues ', Physical Review A, vol. 96, no. 1, 013428 . https://doi.org/10.1103/PhysRevA.96.013428 Physical review / A 96(1), 013428 (2017). doi:10.1103/PhysRevA.96.013428 |
| DOI: | 10.1103/PhysRevA.96.013428 |
| Popis: | Physical review / A 96(1), 013428 (2017). doi:10.1103/PhysRevA.96.013428 We present a joint experimental and theoretical study of the VUV-induced dynamics of $H_2O$ and its deuterated isotopologues in the first excited state $(A^1B_1)$ utilizing a VUV-pump VUV-probe scheme combined with $ab$ initio classical trajectory calculations. 16-fs VUV pulses centered at 161 nm created by fifth-order harmonic generation are employed for single-shot pump-probe measurements. Combined with a precise determination of the VUV pulses' temporal profile, they provide the necessary temporal resolution to elucidate sub-10-fs dissociation dynamics in the 1+1 photon ionization time window. Ionization with a single VUV photon complements established strong-field ionization schemes by disclosing the molecular dynamics under perturbative conditions. Kinetic isotope effects derived from the pump-probe experiment are found to be in agreement with our by ab initio classical trajectory calculations, taking into account photoionization cross sections for the ground and first excited state of the water cation. Published by Inst., Woodbury, NY |
| Databáze: | OpenAIRE |
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