(e,3e)(e,3e) and (e,3−1e)(e,3−1e) differential cross sections for the double ionization of water molecule

We report new results for differential cross sections for the double ionization of water molecule by 1 keV electron impact. The present calculation is based on the first Born approximation. We describe the water molecule by a single centre wave function of Moccia. For the final state, an approximation of the well-known 3C wave function is used. An extensive study has been made by varying the angles of detection and the energies of each ejected electron. We have investigated the double ionization of each molecular state (1b11b1, 3a13a1, 1b21b2 and 2a12a1) and identified the mechanisms of this process.