Ultrafast dynamics in acetylene clocked in a femtosecond XUV stopwatch
- Jiang, Y. H.
- Senftleben, A.
- Ueda, K.
- Rolles, D.
- Treusch, R.
- Zhang, Y. Z.
- Liu, Y. F.
- Schröter, C. D.
- Ullrich, J.
- Moshammer, R.
- Kurka, M.
- Rudenko, A.
- Foucar, L.
- Herrwerth, O.
- Kling, M. F.
- Lezius, M.
- Tilborg, J. V.
- Belkacem, A.
DOIAbstract
Few-photon induced ultrafast dynamics in acetylene (C2H2) leading to several dissociation channels—deprotonation (H++C2H+ and H++C2H2+), symmetric break-up (CH++CH+) and isomerization (C++CH2+)-–were investigated employing the (XUV; extreme ultra-violet)-pump–(XUV; extreme ultra-violet)-probe scheme at the free-electron laser in Hamburg, combined with multi-hit coincidence detection. The kinetic energy releases and fragment-ion momentum distributions for various decay channels are presented. The C++CH2+ and H++C2H2+ channels reveal clear signatures of ultrafast molecular mechanisms, demonstrating potential applications of our pump-probe technique to complex systems in order to study a large variety of ultrafast phenomena in the XUV regime
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