Berlin 2001 – wissenschaftliches Programm
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AMPD: EPS AMPD
AMPD 3: Sitzung 3
AMPD 3.1: Vortrag
Dienstag, 3. April 2001, 09:55–10:30, H105
Recoil-ion momentum distributions for single and double ionization of helium in strong laser fields — •Reinhard Dörner1, Thorsten Weber2, Harald Giessen3, Gunther Urbasch3, Martin Vollmer3, Matthias Weckenbrock2, Andre Staudte2, O. Jagutzki2, L. Spielberger2, V. Mergel2, and Horst Schmidt–Böcking2 — 1Fakultät für Physik, University Freiburg — 2Institut für Kernphysik, University Frankfurt — 3Fachbereich Physik, Philipps-University Marburg
How does a strong femto second laserfield couple to more than one electron in an atom? What is the role of electron-electron correlation for this process and what are the mechanisms? New experiments adressing this question by imaging of the momenta of ions [1–3] and electrons created in the laserpulse [4] will be discussed. The observed structures in the ionic momenta [1,2] as well as the surprising correlated emission of the two electrons [4] give direct evidence of the validity of the rescattering mechanism. These findings for multiphoton double ionization are contrasted to the observations in double ionization by single photon absorbtion.
This work is supported by DFG, BMBF and the Heisenbergprogramm of the DFG.
[1] T. Weber et al. Phys.Rev.Lett. 84,443 (2000)
[2] R. Moshammer et al. Phys.Rev.Lett. 84,447(2000)
[3] T. Weber et al. J.Phys.B. 33,L443 (2000)
[4] T. Weber et al. Nature, 405, 658 - 661 (2000)