Metastable dissociation dynamics of molecular cluster ions

H. Shinohara, H. Sato, F. Misaizu, K. Ohashi, N. Nishi

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Abstract

Metastable uni-cluster dissociation for several hydrogen-bonded and van der Waals cluster ions are observed via resonance-enhanced two-photon ionization reflectron time-of-flight (TOF) mass spectrometry. All of the cluster ions studied show evaporation of a single molecule from the respective parent cluster ions as dominant metastable decay processes. Furthermore, the averaged metastable evaporation rate constants (kevap) of these cluster ions in a fixed time domain of 0.2-50 μs are obtained by analyzing the relative intensity of metastable ion peaks due to evaporation in the acceleration and the field-free drift regions of the TOF mass spectrometer. An intensity anomaly in some of the observed metastable ion peaks, indicative of magic number stability of the cluster ion, is also presented.

Original languageEnglish
Pages (from-to)197-200
Number of pages4
JournalZeitschrift für Physik D Atoms, Molecules and Clusters
Volume20
Issue number1
DOIs
Publication statusPublished - Mar 1 1991
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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