From recollisions to the knee: a road map for double ionization in intense laser fields.
We examine the nature and statistical properties of electron-electron collisions in the recollision process in a strong laser field. The separation of the double ionization yield into sequential and nonsequential components leads to a bell-shaped curve for the nonsequential probability and a monotonically rising one for the sequential process. We identify key features of the nonsequential process and connect our findings in a simplified model which reproduces the knee shape for the probability of double ionization with laser intensity and associated trends.
Mauger
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Centre de Physique Théorique, CNRS-Aix-Marseille Universités, Campus de Luminy, case 907, F-13288 Marseille cedex 09, France.
Chandre
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C
Uzer
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