Conveners
MeV-UED Enabled Ultrafast Chemical Science in Gas and Liquid Phases
- Yusong Liu (SLAC)
Description
Gas and Liquid Phase Chemical Science Enabled by MeV-UED
Provide an introduction to the invited speakers and an overview of the scientific presentations in the session.
Gas-phase ultrafast electron diffraction (UED) has become a powerful tool for capturing molecular dynamics with femtosecond temporal and atomic spatial resolutions, enabling direct observation of phenomena such as photo-dissociation, ring-opening reactions, and nuclear wavepacket motion through conical intersections. Despite significant progress, several challenges remain: temporal resolution...
The five-member ring isomers oxazole and isoxazole (C3H3NO) are an interesting model system for studying UV-induced isomerization and dissociation since the different types of bonds in both isomers (C-N-C-O vs C-N-O-C) are predicted to lead to very different reaction products and dynamics. I will present time-resolved product yields for both isomers obtained from a recent GUED experiment and...
Laser-induced streaking (LIS) of electron beam, first observed by Zewail group back in 1994, is a unique phenomenon in UED that is often used to conveniently identify time-zero in UED experiments. In the gas phase, LIS originates from plasma field created by strong field ionization of sample molecules, hence named as “photoionization-induced lensing” by Zewail. Separately, LIS can also be...
