Non-sequential double ionization of molecules in a strong laser field
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We consider the final stage of double ionization of $\rm O_2$ molecules by short linearly polarized laser pulses. The saddles of the effective adiabatic potential energy close to which simultaneous escape of electrons from a molecule takes place are identified. The analysis of the saddles and numerical simulations of the ionization indicate that to observe clear signatures of simultaneous electron escape in double ionization of $\rm O_2$ molecules stronger and much shorter laser pulses than those used in the recent experiment [E. Eremina, {\it et al}, Phys. Rev. Lett. {\bf 92}, 173001 (2004)] should be applied.
5 pages, 3 figures, Conference proceedings from 13th International Laser Physics Workshop, Triest, Italy, July 12-16, 2004
5 pages, 3 figures, Conference proceedings from 13th International Laser Physics Workshop, Triest, Italy, July 12-16, 2004