Excited-state dynamics of furan studied by sub-20-fs time-resolved photoelectron imaging using 159-nm pulses
The excited-state dynamics of furan were studied by time-resolved photoelectron imaging using a sub-20-fs deep UV (198 nm) and vacuum UV (159 nm) light source. The 198- and 159-nm pulses produce photoionization signals in both pump-probe and probe-pump pulse sequences. When the 198-nm pulse precedes the 159-nm pulse, it creates the {sup 1}A{sub 2}(3s) Rydberg and {sup 1}B{sub 2}(ππ{sup ∗}) valence states, and the former decays exponentially with a time constant of about 20 fs whereas the latter exhibits more complex wave-packet dynamics. When the 159-nm pulse precedes the 198-nm pulse, a wave packet is created on the {sup 1}A{sub 1}(ππ{sup ∗}) valence state, which rapidly disappears from the observation window owing to structural deformation. The 159-nm photoexcitation also creates the 3s and 3p{sub x,y} Rydberg states non-adiabatically.
- OSTI ID:
- 22490867
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 1 Vol. 143; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Involvement of a low-lying Rydberg state in the ultrafast relaxation dynamics of ethylene
Observation of the wavepacket dynamics on the {sup 1}B{sub 2}({sup 1}Σ{sub u}{sup +}) state of CS{sub 2} by sub-20 fs photoelectron imaging using 159 nm probe pulses