We report full-dimensionality quantum and classical calculations of double ionization (DI) of laser-driven helium at 390 nm. Good agreement is observed. We identify the relative importance of the two main non-sequential DI pathways, the direct|with an almost simultaneous ejection of both electrons|and the delayed. We find that the delayed pathway prevails at small intensities independently of total electron energy but at high intensities the direct pathway predominates up to a certain upper-limit in total energy which increases with intensity. An explanation for this increase with intensity is provided.
ASJC Scopus subject areas
- Physics and Astronomy(all)
Emmanouilidou, A., Parker, J., Moore, L., & Taylor, K. (2011). Direct versus delayed pathways in strong-field non-sequential double ionization. New Journal of Physics, 13, . https://doi.org/10.1088/1367-2630/13/4/043001