Photoelectron spectra from multiple ionization of atoms in ultra-intense laser pulses.
We address the question of the energy and angular distributions of the photoelectrons ejected from rare gas atoms submitted to ultra-intense infrared laser pulses, with peak intensities I(max) approximately 10(18) W/cm (2). Several unsolved issues regarding the angular distributions of the photoelectrons are analyzed. We believe that our results should help to trigger new investigations.
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