S-matrix theory of two-electron momentum distribution produced by double ionization in intense laser fields

Becker A, Faisal F. S-matrix theory of two-electron momentum distribution produced by double ionization in intense laser fields. OPTICS EXPRESS. 2001;8(7):383-394.Recently observed momentum distribution of doubly charged recoil-ions of atoms produced by femtosecond infrared laser pulses is analyzed using the so-called intense-field many-body S-matrix theory. Observed characteristics of the momentum distributions, parallel and perpendicular to the polarization axis, are reproduced by the theory. It is shown that correlated energy-sharing between the two electrons in the intermediate state and their 'Volko-dressing' in the final state, can explain the origin of these characteristics. (C) 2001 Optical Society of America