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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

The predissociation of highly excited states in acetylene by time-resolved photoelectron spectroscopy

Author

  • S Zamith
  • V Blanchet
  • B Girard
  • J Andersson
  • Stacey Ristinmaa Sörensen
  • I Hjelte
  • O Bjorneholm
  • D Gauyacq
  • Johan Norin
  • Johan Mauritsson
  • Anne L'Huillier

Summary, in English

We study the dynamics of highly excited states in acetylene initiated by an ultrashort vacuum ultraviolet laser pulse. Electronic states lying in the 4s-3d Rydberg region are excited with one femtosecond pulse, and the dynamic development of the states is monitored by a second short pulse which ionizes the system. We show that even for femtosecond pulses where the bandwidth of the exciting pulse covers several electronic states, it is possible to extract short decay lifetimes through time-resolved photoelectron spectroscopy by using a frequency-modulated (chirped) excitation pulse. We report decay lifetimes for the F 4(0)(2) and E 4-5(0)(2) states in acetylene, and for the E 4(0)(2) and E 5(0)(2) states in d-acetylene. The time evolution measured in the electron spectra is compared to decay spectra measured using ion yield and the differences in these results are discussed. (C) 2003 American Institute of Physics.

Department/s

  • Synchrotron Radiation Research
  • Atomic Physics

Publishing year

2003

Language

English

Pages

3763-3773

Publication/Series

Journal of Chemical Physics

Volume

119

Issue

7

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0021-9606