Ultrafast extreme ultraviolet induced isomerization of acetylene cations

Y. H. Jiang, A. Rudenko, O. Herrwerth, L. Foucar, M. Kurka, K. U. Kühnel, M. Lezius, M. F. Kling, J. Van Tilborg, A. Belkacem, K. Ueda, S. Düsterer, R. Treusch, C. D. Schröter, R. Moshammer, J. Ullrich

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152 Citations (Scopus)

Abstract

Ultrafast isomerization of acetylene cations ([HC=CH]⊃+) in the low-lying excited AΣg+2 state, populated by the absorption of extreme ultraviolet (XUV) photons (38 eV), has been observed at the Free Electron Laser in Hamburg, (FLASH). Recording coincident fragments C⊃++CH2+ as a function of time between XUV-pump and -probe pulses, generated by a split-mirror device, we find an isomerization time of 52±15fs in a kinetic energy release (KER) window of 5.8<KER<8eV, providing clear evidence for the existence of a fast, nonradiative decay channel.

Original languageEnglish
Article number263002
JournalPhysical review letters
Volume105
Issue number26
DOIs
Publication statusPublished - 2010 Dec 22

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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