Excited-state dynamics of CH2I2 and CH2IBr studied with UV-pump VUV-probe momentum-resolved photoion spectroscopy
- Author(s)
- Yusong Liu, Tamas Rozgonyi, Philipp Marquetand, Thomas Weinacht
- Abstract
We perform time-resolved ionization spectroscopy measurements of the excited state dynamics of CH2I2 and CH2IBr following photoexcitation in the deep UV. The fragment ions produced by ionization with a vacuum-ultraviolet probe pulse are measured with velocity map imaging, and the momentum resolved yields are compared with trajectory surface hopping calculations of the measurement observable. Together with recent time-resolved photoelectron spectroscopy measurements of the same dynamics, these results provide a detailed picture of the coupled electronic and nuclear dynamics involved. Our measurements highlight the non-adiabatic coupling between electronic states, which leads to notable differences in the dissociation dynamics for the two molecules.
- Organisation(s)
- Department of Theoretical Chemistry, Research Platform Accelerating Photoreaction Discovery, Research Network Data Science
- External organisation(s)
- State University of New York, Stony Brook, Hungarian Academy of Sciences
- Journal
- Journal of Chemical Physics
- Volume
- 153
- No. of pages
- 11
- ISSN
- 0021-9606
- DOI
- https://doi.org/10.1063/5.0026177
- Publication date
- 11-2020
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104017 Physical chemistry, 103006 Chemical physics
- Keywords
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/excitedstate-dynamics-of-ch2i2-and-ch2ibr-studied-with-uvpump-vuvprobe-momentumresolved-photoion-spectroscopy(ade44ea2-14ee-4804-b213-97b2cfaebf74).html