Hannover 2016 – scientific programme

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A: Fachverband Atomphysik

A 20: Atomic systems in external fields

A 20.8: Poster

Tuesday, March 1, 2016, 16:30–19:00, Empore Lichthof

Slow electrons from non-adiabatic transitions in a two-electron system — •Qi-Cheng Ning, Koudai Toyota, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany

Atomic systems exposed to short high-frequency laser pulses release unexpectedly slow electrons which are the consequence of non-adiabatic transition [1,2]. In single-active-electron atomic system, the relevant mechanisms can be clearly formulated and explained by means of the envelope hamiltonian defined recently [3].

Here we extend the study to a two-electron model atom. Both double and single ionization have been calculated and show the peaks of slow electrons. It is confirmed these slow electrons are also generated from non-adiabatic transitions. The role played by electron-electron correlation has been studied.

[1] M. Førre, S. Selstø, J. P. Hansen, and L. B. Madsen, Phys. Rev. Lett. 95, 043601 (2005).

[2] K. Toyota, O. I. Tolstikhin, T. Morishita, and S. Watanabe, Phys. Rev. Lett. 103, 153003 (2009).

[3] K. Toyota, U. Saalmann, and J. M. Rost, New J. Phys. 17, 073005 (2015).