Femtosecond electron spectroscopy of coronene, benzo[GHI]perylene, and anthracene

M. Kjellberg, A. V. Bulgakov, M. Goto, O. Johansson, K. Hansen

Research output: Contribution to journalArticlepeer-review

Abstract

The large polycyclic aromatic hydrocarbon molecules coronene, benzo[GHI]perylene, and anthracene have been ionized with femtosecond laser pulses at low laser intensities and the ionization process studied with velocity map imaging spectroscopy, supplemented with ion yield measurements. The electron spectra of coronene and benzo[GHI]perylene are structureless. Based on fluence and pulse duration dependence measurements, it is shown that the electron spectra are not produced in field ionization processes, and the ionization mechanism is identified to be a quasithermal statistical electron emission, previously suggested for the fullerenes C-60 and C-70. The anthracene photoelectron spectra are dominated by above threshold ionization features, but with some indication of quasithermal ionization at longer pulses. (C) 2010 American Institute of Physics. [doi:10.1063/1.3466925]

Original languageEnglish
Article number074308
Pages (from-to)-
Number of pages7
JournalThe Journal of Chemical Physics
Volume133
Issue number7
DOIs
Publication statusPublished - 21 Aug 2010

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