Lawrence Berkeley National Laboratory
Ultrafast dynamics of the lowest-lying neutral states in carbon dioxide
- Author(s): Wright, TW
- Champenois, EG
- Cryan, JP
- Shivaram, N
- Yang, CS
- Belkacem, A
- et al.
Published Web Locationhttps://doi.org/10.1103/PhysRevA.95.023412
© 2017 American Physical Society. We present a study of the ultrafast dissociation dynamics of the lowest-lying electronic excited states in CO2 by using ultraviolet (UV) and extreme-ultraviolet (XUV) pulses from high-order harmonic generation. We observe two primary dissociation channels: a direct dissociation channel along the Πg1 electronically excited manifold, and a second channel which results from the mixing of electronic states. The direct dissociation channel is found to have a lifetime which is shorter than our experimental resolution, whereas the second channel has a significantly longer lifetime of nearly 200 fs. In this long-lived channel we observe a beating of the vibrational populations with a period of ∼133 fs.