Nonsequential double ionization of the aligned hydrogen molecule in strong field

This paper studies the nonsequential double ionization (NSDI)process of diatomic molecules aligned parallel and perpendicular toan intense linearly polarized laser field by using athree-dimensional semiclassical model. With this model, it achievesinsight into the ion momentum distribution under the combinedinfluence of a two-centre Coulomb potential and an intense laserfield, and this result shows the significant influence of molecularalignment on the ratio between double and single ionization rate.Careful investigations show that the NSDI process for differentalignment molecules has a close relation to the laser intensity andthe different bounding electron distribution has a significantinfluence on the final ion momentum distribution.