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Author Champenois, Elio G. ♦ Shivaram, Niranjan H. ♦ Belkacem, Ali ♦ Wright, Travis W. ♦ Yang, Chan-Shan ♦ Cryan, James P.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ETHYLENE ♦ EXCITATION ♦ INTERNAL CONVERSION ♦ KINETIC ENERGY ♦ LASER RADIATION ♦ PHOTOIONIZATION ♦ PROBES ♦ RELAXATION ♦ RYDBERG STATES ♦ TIME RESOLUTION ♦ TRANSIENTS ♦ VALENCE ♦ VISIBLE RADIATION ♦ WAVE PACKETS
Abstract We present a measurement of the time-resolved photoelectron kinetic energy spectrum of ethylene using 156 nm and 260 nm laser pulses. The 156 nm pulse first excites ethylene to the {sup 1}B{sub 1u} (ππ{sup ∗}) electronic state where 260 nm light photoionizes the system to probe the relaxation dynamics with sub-30 fs resolution. Recent ab initio calculations by Mori et al. [J. Phys. Chem. A 116, 2808-2818 (2012)] have predicted an ultrafast population transfer from the initially excited state to a low-lying Rydberg state during the relaxation of photoexcited ethylene. The measured photoelectron kinetic energy spectrum reveals wave packet motion on the valence state and shows indications that the low-lying π3s Rydberg state is indeed transiently populated via internal conversion following excitation to the ππ{sup ∗} state, supporting the theoretical predictions.
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-07
Publisher Place United States
Journal Journal of Chemical Physics
Volume Number 144
Issue Number 1


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