Title: Molecular ionization of cyclohexanone in femtosecond laser fields: An application of ADK theory
Authors: Wang, Q. Q.
Mineo, H.
Wu, D.
Jin, M. X.
Chin, C. H.
Teranishi, Y.
Chao, S. D.
Ding, D.
Lin, S. H.
應用化學系
Department of Applied Chemistry
Issue Date: 1-Aug-2009
Abstract: The mechanisms of ionization and dissociation of cyclohexanone (C(6)H(10)O) in a 90 fs, 788 nm linearly polarized laser field ranging from 10(13) to 10(14) W/cm(2) by a time-of-flight mass spectrometer (TOF-MS) have been investigated. The ion yields as a function of laser intensity have been measured experimentally. By comparison with the Ammosov-Delone-Krainov (ADK) theory based on a hydrogen-like model, the ionization mechanism of cyclohexanone in this intense femtosecond laser field has been understood. Considering the importance of molecular nuclear motions, we propose that the Franck-Condon (F-C) factor can provide the excess vibrational energy in the molecular ion. This energy is required for the decomposition of the molecular ion which finally results in the observed mass spectrum.
URI: http://dx.doi.org/10.1134/S1054660X09150419
http://hdl.handle.net/11536/6884
ISSN: 1054-660X
DOI: 10.1134/S1054660X09150419
Journal: LASER PHYSICS
Volume: 19
Issue: 8
Begin Page: 1671
End Page: 1676
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