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A: Fachverband Atomphysik

A 8: Poster I

A 8.46: Poster

Dienstag, 9. März 2010, 16:30–19:00, Lichthof

Coulomb effects on low-energy momentum spectra in strong field ionization — •Tian-Min Yan¹ and Dieter Bauer² — ¹Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany — ²Institut für Physik, Universität Rostock, 18051 Rostock, Germany

For low-energetic photoelectrons emitted from Coulombic binding potentials, the momentum spectra as they are predicted by the plain "strong field approximation" (SFA, see [1] for a review) are in strong qualitative disagreement with ab initio results and experiment. Recently, a surprising "low energy structure" (LES) has been identified in experiments using long wavelengths [2]. We present results from the numerical solution of the time-dependent Schrödinger equation and compare them to Coulomb-corrected SFAs. Plain SFA and some of the Coulomb-corrected SFAs do not reproduce the low-energy nodal pattern in the momentum spectra, while others do. The origin of the LES at long wavelengths is also discussed.

[1] D.B. Milosevic et al., J. Phys. B 39, R203 (2006).

[2] C.I. Blaga et al., Nature Phys. 5, 335 (2009).