Ionization of Atomic Hydrogen in Strong Infrared Laser Fields
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We have used the matrix iteration method of Nurhuda and Faisal (Phys. Rev. A 60 (1999) 3125) to treat ionization of atomic hydrogen by a strong laser pulse. After testing our predictions against a variety of previous calculations, we present ejected-electron spectra as well as angular distributions for few-cycle infrared laser pulses with peak intensities of up to 1015W/cm2. It is shown that the convergence of the results with the number of partial waves is a serious issue, which can be managed in a satisfactory way by using the velocity form of the electric dipole operator in connection with an efficient time-propagation scheme.
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