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Multiple Ionization Of Sodium Clusters By Ion Impact

Author

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  • F. CHANDEZON

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • C. GUET

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • B.A. HUBER

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • D. JALABERT

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • M. MAUREL

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • E. MONNAND

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • C. RISTORI

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

  • J.C. ROCCO

    (CEA/Département de Recherche Fondamentale sur la Matière Condensée, Laboratoire des Ions, Atomes et Agrégats, CENG, 17, rue des Martyrs, F38054 Grenoble Cedex 9, France)

Abstract

The electronic excitation of alkali-metal clusters by low-energy ions is investigated experimentally for the first time. Multi-ionized clusters possibly undergoing Coulomb dissociation are formed and detected. Free sodium clusters of a few hundred atoms have been bombarded by different ion beams(H+,O5+,Ar8+)of velocity ranging from 0.2 to0.9v0. The mass/charge ratio of charged outgoing clusters is measured by a time-of-flight spectrometer of high resolution$(\frac{m}{\Delta m} =2500)$. Critical sizes for stability against charge excess have been deduced for cluster charges up to 6. Temperature effects on critical sizes are observed, and they reveal two distinct regimes: electron transfer in peripheral collisions with multicharged ions leading to “cold” highly ionized clusters and strong electronic excitation in central collisions subsequently followed by multielectron emission.

Suggested Citation

  • F. Chandezon & C. Guet & B.A. Huber & D. Jalabert & M. Maurel & E. Monnand & C. Ristori & J.C. Rocco, 1996. "Multiple Ionization Of Sodium Clusters By Ion Impact," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 529-533.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x96000966
    DOI: 10.1142/S0218625X96000966
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