title: Observation and theoretical description of periodic geometric rearrangement in electronically excited nonstoichiometric sodium-fluoride clusters.
abstract: We present two-color fs pump-probe spectra of Na2F which were recorded by employing excitation wavelengths around 1208 nm (pump) and ionization wavelengths around 405 nm (probe). The observed oscillatory structure of the signal with a period of 185 fs shows an excellent agreement with our simulated spectra. The employed ab initio Wigner distribution approach provides clear evidence that this observation is caused by photoinduced metal bond breaking followed by a butterfly-type periodic geometric rearrangement.
authors.affiliation: Freie-Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Vajda
authors.forename: Cosmin
authors.initials: C
authors.lastname: Lupulescu
authors.forename: Andrea
authors.initials: A
authors.lastname: Merli
authors.forename: Filip
authors.initials: F
authors.lastname: Budzyn
authors.forename: Ludger
authors.initials: L
authors.lastname: Wöste
authors.forename: Michael
authors.initials: M
authors.lastname: Hartmann
authors.forename: Jirí
authors.initials: J
authors.lastname: Pittner
authors.forename: Vlasta
authors.initials: V
authors.lastname: Bonacić-Koutecký