Fast-beam study of H2 + ions in an intense femtosecond laser field

I D Williams, P McKenna, B Srigengan, I M G Johnston, W A Bryan, J H Sanderson, A El-Zein, T R J Goodworth, W R Newell, P F Taday, A J Langley

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A fast beam of H2 + ions, produced from a low energy ion accelerator, has been used for the first time in intense laser field experiments. The technique has enabled neutral dissociation products to be analyzed and detected for the first time in such studies. Energy spectra of neutral and ionized fragments, product yields as a function of focused laser intensity and angular distributions of neutral dissociation products have been measured. Significant differences are observed between the present results and those obtained from experiments involving neutral H2 molecules. These differences are indicative of the precursor H2 molecule playing an important and hitherto neglected formative role in the laser-induced fragmentation processes.

Original languageEnglish
Pages (from-to)2743-2752
Number of pages10
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number14
Publication statusPublished - 28 Jul 2000


  • low energy ion accelerator
  • laser field experiments
  • focused laser intensity

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