Coincident angle-resolved state-selective photoelectron spectroscopy of acetylene molecules: a candidate system for time-resolved dynamics
نویسندگان
چکیده
The acetylene-vinylidene system serves as a benchmark for investigations of ultrafast dynamical processes where the coupling electronic and nuclear degrees freedom provides fertile playground to explore femto- sub-femto-second physics with coherent extreme-ultraviolet (EUV) photon sources both on table-top well free-electron lasers. We focus detailed this molecular in energy range $19...40$ eV EUV pulses can probe dynamics effectively. employ photoelectron-photoion coincidence (PEPICO) spectroscopy uncover hitherto unrevealed aspects system. In work, role excited states $C_{2}H_{2}^{+}$ cation, primary photoion, is specifically addressed. From photoelectron spectra angular distributions, nature dissociation isomerization channels discerned. Exploiting $4\pi$-collection geometry velocity map imaging spectrometer, we not only pathways efficiency photoionization inherently high but also perform PEPICO relatively weak channels.
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ژورنال
عنوان ژورنال: Faraday Discussions
سال: 2021
ISSN: ['1359-6640', '1364-5498']
DOI: https://doi.org/10.1039/d0fd00120a