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Ionization dynamics of simple metal clusters in intense fields by the Thomas-Fermi-Vlasov method

  • T. FennelEmail author
  • G. F. Bertsch
  • K.-H. Meiwes-Broer
Article

Abstract.

The time-dependent response of simple metal clusters to femtosecond laser pulses is investigated using the semiclassical theory based on the Vlasov equation. Starting from a Thomas-Fermi ground state the dynamics are calculated by use of the pseudoparticle method. Systems studied here are sodium clusters containing up to 147 atoms. Both, the energy transfer to the cluster, which is largely affected by the plasmon enhanced absorption, and the following release of energy to the ions are examined in detail. During the laser excitation the feedback of the absorption to the development of the plasmon energy is controlled by competing mechanisms: ionization and cluster expansion. Characteristics of the Coulomb explosion are studied as function of photon energy and cluster size, particularly with regard to the dynamical influence of collective excitations of the electrons. We also predict features in the angular distribution of the ions that could be measured to test the calculated dynamics.

Keywords

Laser Pulse Photon Energy Angular Distribution Cluster Size Femtosecond Laser 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Fachbereich PhysikUniversität RostockRostockGermany
  2. 2.Department of Physics and National Institute for Nuclear TheoryUniversity of WashingtonSeattleUSA

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