Related Experiment Videos
Probing the ultrafast nuclear motion in CS2 2+ in intense laser fields
Akiyoshi Hishikawa1, Masakuni Ueyama, Kaoru Yamanouchi
1Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585, Japan.
The Journal of Chemical Physics
|June 11, 2005
Summary
Investigating the carbon disulfide molecule (CS2 2+) dynamics using pump-probe spectroscopy reveals its nuclear wave packet evolves along stretching and bending coordinates, leading to bond dissociation. This study tracks real-time molecular fragmentation pathways.
Area of Science:
- Physical Chemistry
- Molecular Dynamics
- Ultrafast Spectroscopy
Background:
- Understanding molecular fragmentation dynamics is crucial for controlling chemical reactions.
- Intense laser fields can induce complex dynamics in molecules, leading to dissociation.
Purpose of the Study:
- To trace the real-time temporal evolution of the nuclear wave packet in CS2 2+.
- To investigate the dissociation pathways of CS2 2+ under intense laser irradiation.
Main Methods:
- Pump-and-probe technique combined with coincidence momentum imaging.
- Analysis of momentum correlations among fragment ions (S+, C+, S+).
Main Results:
- The nuclear wave packet in CS2 2+ evolves along both anti-symmetric and symmetric stretching coordinates.
- Simultaneous breaking of both C-S bonds was observed.
- Contribution of bent and linear electronic states to wave packet motion along the bending coordinate was identified.
Conclusions:
- Real-time tracking of molecular wave packet evolution provides insights into dissociation mechanisms.
- CS2 2+ dissociation involves complex nuclear dynamics influenced by electronic state configurations.