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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 $Ar_{800}$) irradiated by a femtosecond infrared laser with moderate intensity $I_{L}$≈$10^{13}$ 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.
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Lionel Poisson, Kevin Raffael, Marc-André Gaveau, Benoît Soep, Jean-Michel Mestdagh, et al.. Low Field Laser Ionization of Argon Clusters: The Remarkable Fragmentation Dynamics of Doubly Ionized Clusters. Physical Review Letters, American Physical Society, 2007, 99 (10), pp.103401. ⟨10.1103/PhysRevLett.99.103401⟩. ⟨hal-01955588⟩

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