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- W4310361259 abstract "Dissociation of the ethylene cation is a prototypical multistep pathway in which the exact mechanisms leading to internal energy conversions are not fully known. For example, it is still unclear how the energy is exactly redistributed among the internal modes and which step is rate-determining. Here we use few-femtosecond extreme-ultraviolet pulses of tunable energy to excite a different superposition of the four lowest states of C2H4+ and probe the subsequent fast relaxation with a short infrared pulse. Our results demonstrate that the infrared pulse photoexcites the cationic ground state (GS) to higher excited states, producing a hot GS upon relaxation, which enhances the fragmentation yield. As the photoexcitation probability of the GS strongly depends on the molecular geometry, the probing by the IR pulse provides information about the ultrafast excited-state dynamics and the type of conical intersection (planar or twisted) involved in the first 20 fs of the nonradiative relaxation." @default.
- W4310361259 created "2022-12-09" @default.
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- W4310361259 date "2022-11-29" @default.
- W4310361259 modified "2023-09-27" @default.
- W4310361259 title "Few-Femtosecond C<sub>2</sub>H<sub>4</sub><sup>+</sup> Internal Relaxation Dynamics Accessed by Selective Excitation" @default.
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- W4310361259 doi "https://doi.org/10.1021/acs.jpclett.2c02763" @default.
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