Time-resolved (e, 2e) electron momentum spectroscopy on the toluene S1 excited state

29th International Conference on Photonic, Electronic, and Atomic Collisions

Yamazaki, Masakazu^1 ; Tang, Yaguo^2 ; Takahashi, Masahiko^1

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai

980-8577, Japan^1

HFNL, University of Science and Technology of China, Hefei

230026, China^2

关键词: Data statistics;    Electron momentum spectroscopy;    Electron pulse;    Ground electronic state;    Incident electron beams;    Ionization transitions;    Time-resolved;    Toluene molecules;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/7/072021/pdf
DOI  :  10.1088/1742-6596/635/7/072021

来源: IOP

【 摘 要 】

We report a time-resolved (e, 2e) experiment on the toluene molecule in the S1(π, π∗) state. The toluene S1state was prepared by a 267 nm pump laser and probed with electron momentum spectroscopy using a 1.2 keV incident electron beam consisting of a train of 4 or 8 ultrashort electron pulses (∼ 1 ps) with 0.3 or 0.7 ns intervals. In spite of the low data statistics, the experimental results clearly demonstrate that the present technique selectively probes ionization transition to two-hole-one-particle configurations that are hardly accessible from the ground electronic state.