Transient X-Ray Fragmentation: Probing a Prototypical Photoinduced Ring Opening

Vladimir S. Petrović et al.
Phys. Rev. Lett. 108, 253006 – Published 21 June 2012
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Abstract

We report the first study of UV-induced photoisomerization probed via core ionization by an x-ray laser. We investigated x-ray ionization and fragmentation of the cyclohexadiene-hexatriene system at 850 eV during the ring opening. We find that the ion-fragmentation patterns evolve over a picosecond, reflecting a change in the state of excitation and the molecular geometry: the average kinetic energy per ion fragment and H+-ion count increase as the ring opens and the molecule elongates. We discuss new opportunities for molecular photophysics created by optical pump x-ray probe experiments.

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  • Received 28 December 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.253006

© 2012 American Physical Society

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Vol. 108, Iss. 25 — 22 June 2012

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