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The European Physical Journal D

, Volume 43, Issue 1–3, pp 77–80 | Cite as

Isotope effects in the metastable decay of Ne2 +

  • K. Głuch
  • J. Fedor
  • R. Parajuli
  • O. EchtEmail author
  • S. Matt-Leubner
  • P. Scheier
  • T. D. Märk
Structure and Thermodynamics of Free Clusters

Abstract.

Neon dimer ions undergo spontaneous dissociation (metastable decay) several microseconds after formation by electron impact ionization of neon clusters. In this contribution we compare the kinetic energy release distribution (KERD) of the previously reported isotopomer 20Ne2 + with that of 22Ne2 +. The heavy isotopomer shows the same two components in the KERD as the lighter ones. However, the high-energy component that is due to electronic pre-dissociation is reduced in intensity. The decrease is attributed to a reduced predissociation rate from the II(1/2u) state into I(3/2u).

PACS.

36.40.Qv Stability and fragmentation of clusters 36.40.Wa Charged clusters 33.15.Hp Barrier heights (internal rotation, inversion, rotational isomerism, conformational dynamics) 34.30.+h Intramolecular energy transfer; intramolecular dynamics; dynamics of van der Waals molecules 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  • K. Głuch
    • 1
  • J. Fedor
    • 1
  • R. Parajuli
    • 1
  • O. Echt
    • 1
    Email author
  • S. Matt-Leubner
    • 1
  • P. Scheier
    • 1
  • T. D. Märk
    • 1
  1. 1.Institut für Ionenphysik und Angewandte Physik, Leopold Franzens UniversitätInnsbruckAustria

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