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- W4313197279 abstract "Understanding the relaxation pathways of photoexcited molecules is essential to gain atomistic level insight into photochemistry. Herein, we perform a time-resolved study of ultrafast molecular symmetry breaking via geometric relaxation (Jahn-Teller distortion) on the methane cation. Attosecond transient absorption spectroscopy with soft X-rays at the carbon K-edge reveals that the distortion occurs within $10pm 2$ femtoseconds after few-femtosecond strong-field ionization of methane. The distortion activates coherent oscillations in the scissoring vibrational mode of the symmetry broken cation, which are detected in the X-ray signal. These oscillations are damped within $58pm13$ femtoseconds, as vibrational coherence is lost with the energy redistributing into lower-frequency vibrational modes. This study completely reconstructs the molecular relaxation dynamics of this prototypical example and opens new avenues for exploring complex systems." @default.
- W4313197279 created "2023-01-06" @default.
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- W4313197279 date "2022-12-25" @default.
- W4313197279 modified "2023-09-27" @default.
- W4313197279 title "Femtosecond Symmetry Breaking and Coherent Relaxation of Methane Cations at the Carbon K-Edge" @default.
- W4313197279 doi "https://doi.org/10.48550/arxiv.2212.12875" @default.
- W4313197279 hasPublicationYear "2022" @default.
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