Strong Laser Fields
Welcome to the Strong Laser Fields Group at the Department of Molecular and Optical Physics, University of Freiburg, Germany.
Correlation between Double and Nonresonant Single Ionization
R. Wiehle and B. Witzel
Department of Molecular and Optical Physics, Albert-Ludwigs-Universität, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany
We performed simultaneous measurements of electrons and ions produced in Xe photoionization driven by an 800-nm, 100-fs laser pulse.
The obtained energy and angular resolved electron spectra allow the identification of the electronic states populated
during the ionization. Xe2+ ions appear at the same laser intensity as electrons emerging from a nonresonant
9-photon ionization process of Xe. Similar to optical tunneling ionization, the nonresonant ionization delivers low-energy electrons needed
for the formation of Xe2+ by a backscattering process.
©2002 The American Physical Society
©2002 Phys. Rev. Lett. 89, 223002-1 (2002)
PACS: 32.80.Gc, 32.80.Rm, 39.30.+w