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MO: Fachverband Molekülphysik
MO 10: Collisions and Reactions
MO 10.2: Vortrag
Mittwoch, 11. März 2020, 11:15–11:30, f142
XUV-photoinduced addition reactions from ethene measured with a radio frequency ion trap — •Simon Reinwardt1, Ivan Baev1, Julius Schwarz1, Fridtjof Kielgast1, Karolin Mertens1, Florian Trinter2,3, and Michael Martins1 — 1Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany — 2FS-PETRA-S, DESY, Hamburg, Germany — 3Molecular Physics, Fritz-Haber-Institut, Berlin, Germany
The interstellar formation of larger hydrocarbons is not fully clarified yet. There are different models in which the larger hydrocarbons are formed by dehydrogenation and fragmentation as well as isomerization of hydrocarbons [1]. In conventional experiments the formation of larger hydrocarbon systems is investigated by their fragmentation via X-rays. In contrast to that, the reverse path of generating larger hydrocarbons by XUV-induced addition reactions is realized here. An ideally suited setup for such experiments is the ion trap of the photon ion spectrometer (PIPE) [2] at the soft X-ray beamline P04 of the synchrotron PETRA III in Hamburg. For these experiments ethene (C2H4) was used as starting molecule. Consequently, photoactivation was achieved by the absorption of XUV-photons in the carbon K-edge region (∼ 290 eV). In this way it was possible to find reaction products such as C6Hx+ and C5Hx+, which were generated from a double collision.
[1] O. Berńe and A. G. G. M. Tielens, PNAS 109, 401 (2012).
[2] S. Schippers et al., J. Phys. B: At. Mol. Opt. Phys. 47, 115602
(2014).