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We report on the use of extreme ultraviolet (XUV, 30.3 nm) radiation from the Free-electronLASer in Hamburg (FLASH) and visible (Vis, 405 nm) photons from an optical laser toinvestigate the relaxation and fragmentation dynamics of fluorene ions. The ultrashort laserpulses allow to resolve the molecular processes occurring on the femtosecond timescales.Fluorene is a prototypical small polycyclic ar
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We investigated the dissociation of dications and trications of three polycyclic aromatic hydrocarbons (PAHs), fluorene, phenanthrene, and pyrene. PAHs are a family of molecules ubiquitous in space and involved in much of the chemistry of the interstellar medium. In our experiments, ions are formed by interaction with 30.3 nm extreme ultraviolet (XUV) photons, and their velocity map images are rec