Heidelberg 2015 – scientific programme
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A: Fachverband Atomphysik
A 10: Poster: Interaction with strong or short laser pulses
A 10.1: Poster
Monday, March 23, 2015, 17:00–19:00, C/Foyer
Resonant Auger decay of the 4d → 6p excitation in Xe driven by short intense coherent soft x-ray pulses — •Anne D Müller and Philipp V Demekhin — Institut für Physik, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
The dynamics of the resonant Auger decay of the Xe∗ 4d5/296p3/2 (J=1) excited state induced by a short coherent and intense soft x-ray laser pulse is investigated theoretically. The present approach includes (i) the non-Hermitian coupling between the ground state and the resonance caused by the driving pulse, (ii) the interference between the coherent populations of the final ionic states by the decay of the resonance and by the direct photoionization of the ground state, and (iii) the direct ionization of the resonance itself. The individual influence of the different competing physical processes on the total ion yield and on the electron spectrum of the most intense Xe+ 5p4(3P)6p 2P3/2 spectator Auger decay line is examined. The present numerical spectra are interpreted analytically in terms of the dynamic interference of the electron waves emitted on the rising and falling sides of the driving pulse. Our results provide a theoretical basis for experiments on the verification of the dynamic interference at currently available sources of intense high-frequency laser pulses.