期刊
JOURNAL OF CHEMICAL PHYSICS
卷 134, 期 18, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3586809
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资金
- RIKEN
- Grants-in-Aid for Scientific Research [23750012] Funding Source: KAKEN
Ultrafast internal conversion of benzene and toluene from the S-2 states was studied by time-resolved photoelectron imaging with a time resolution of 22 fs. Time-energy maps of the photoelectron intensity and the angular anisotropy were generated from a series of photoelectron images. The photoelectron kinetic energy distribution exhibits a rapid energy shift and intensity revival, which indicates nuclear motion on the S-2 adiabatic surface, while the ultrafast evolution of the angular anisotropy revealed a change in the electronic character of the S-2 adiabatic surface. From their decay profiles of the total photoelectron intensity, the time constants of 48 +/- 4 and 62 +/- 4 fs were determined for the population decay from the S-2 states in benzene and toluene, respectively. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3586809]
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