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Landau fragmentation and deformation effects in dipoSe response of sodium clusters

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Abstract

Recent experimental data on the dipole plasmon in axial sodium clusters Na + N with 11 ≤ N ≤ 57 are analyzed within a self-consistent separable random-phase approximation (SRPA) based on the deformed Konh-Sham functional. Good agreement with the data is achieved. The calculations show that, while in light clusters plasmon properties (gross structure and width) are determined mainly by deformation splitting, in medium clusters with N τ 50 the Landau fragmentation becomes decisive. Moreover, in medium clusters shape isomers come to play with contributions to the plasmon comparable with the ground state one. As a result, commonly used methods of the experimental analysis of cluster deformation become useless and correct treatment of cluster shape requires microscopic calculations.

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Authors and Affiliations

  1. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Moscow region, Russia

    V. O. Nesterenko & W. Kleinig

  2. Institut für Analysis, Technische Universität Dresden, 01062, Dresden, Germany

    W. Kleinig

  3. Institut für Theoretische Physik, Universität Erlangen, 91058, Erlangen, Germany

    P. -G. Reinhard

Authors
  1. V. O. Nesterenko
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  2. W. Kleinig
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  3. P. -G. Reinhard
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Nesterenko, V.O., Kleinig, W. & Reinhard, P.G. Landau fragmentation and deformation effects in dipoSe response of sodium clusters. Eur. Phys. J. D. 19, 57–64 (2002). https://doi.org/10.1140/epjd/e20020055

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