title: Low field laser ionization of argon clusters: the remarkable fragmentation dynamics of doubly ionized clusters.
abstract: We have investigated the fission following a Coulomb explosion in argon clusters (up to Ar800) irradiated by a femtosecond infrared laser with moderate intensity IL approximately 10(13) W cm(-2). We report the a priori surprising observation of well-defined velocity distributions of the ionized fragments Ar+n<50. This is interpreted by the formation of a valence shell excited charged ion, followed by relaxation, charge transfer by autoionizing collision at very short distance, and asymmetric fission.
authors.affiliation: Laboratoire Francis Perrin, CEA/DSM/DRECAM/SPAM-CNRS URA 2453, C.E.A. Saclay, F-91191 Gif-sur-Yvette cedex, France. lionel.poisson@cea.fr
authors.forename: Lionel
authors.initials: L
authors.lastname: Poisson
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Raffael
authors.forename: Marc-André
authors.initials: MA
authors.lastname: Gaveau
authors.forename: Benoît
authors.initials: B
authors.lastname: Soep
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Mestdagh
authors.forename: Jérémie
authors.initials: J
authors.lastname: Caillat
authors.forename: Richard
authors.initials: R
authors.lastname: Taïeb
authors.forename: Alfred
authors.initials: A
authors.lastname: Maquet