Delayed ionization and fragmentation en route to thermionic emission: Statistics and dynamics

E. E.B. Campbell, R. D. Levine

Research output: Contribution to journalArticlepeer-review

128 Scopus citations

Abstract

Thermionic emission is discussed as a long time (microseconds) decay mode of energy-rich large molecules, metallic and metcar clusters, and fullerenes.We review what is known and consider the many experiments, systems, and theoretical and computational studies that still need to be done. We conclude with a wish list for future work. Particular attention is given to the experimental signatures, such as the dependence on the mode of energy acquisition, and theoretical indications of a not-quite-statistical delayed ionization and to the competition of electron emission with other decay modes, such as fragmentation or radiative cooling. Coupling of the electronic and nuclear modes can be a bottleneck and quite long time-delayed ionization can be observed, as in the decay of high Rydberg states probed by ZEKE spectroscopy, before the onset of complete energy partitioning.

Original languageEnglish
Pages (from-to)65-98
Number of pages34
JournalAnnual Review of Physical Chemistry
Volume51
DOIs
StatePublished - 2000

Keywords

  • Clusters
  • Fullerenes
  • Rydberg states

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