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Probing angular correlations in sequential double ionization.

A Fleischer1, H J Wörner, L Arissian

  • 1Joint Attosecond Science Laboratory, National Research Council and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6.

Physical Review Letters
|October 27, 2011
PubMed
Summary
This summary is machine-generated.

We observed electron correlation in sequential double ionization of atoms and molecules using intense laser pulses. A clear angular correlation was found between the two ionization steps in this process.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Quantum Chemistry
  • Laser Physics

Background:

  • Electron correlation plays a crucial role in atomic and molecular processes.
  • Sequential double ionization is a fundamental process in strong-field physics.
  • Understanding electron correlation in intense laser fields is key to controlling ionization dynamics.

Purpose of the Study:

  • To investigate electron correlation in sequential double ionization of noble gases and HCl.
  • To measure photoelectron angular distributions and their correlations.
  • To explore the influence of intense femtosecond laser pulses on ionization dynamics.

Main Methods:

  • Utilized pump-probe experiments with 8 fs, 800 nm circularly polarized laser pulses.
  • Measured photoelectron angular distributions of Ne+ relative to the first electron.
  • Employed a linear-linear pump-probe setup for He, Ar, and HCl studies.

Main Results:

  • Observed clear angular correlations between the two ionization steps in sequential double ionization.
  • Characterized the angular distributions of photoelectrons in intense laser fields.
  • Demonstrated the sensitivity of ionization dynamics to electron correlation effects.

Conclusions:

  • Electron correlation significantly influences sequential double ionization.
  • Angular correlations provide insights into the dynamics of multi-electron ionization.
  • The findings contribute to a deeper understanding of electron-electron interactions in strong laser fields.