Table 1 Angle integrated ionization probabilities \(d\!P/d\!E\) for specific energies, either calculated with length or velocity form of the dipole operator. Column 1: energy of the emitted electron, column 2: \(d\!P/d\!E\) calculated in length form, column 3: in velocity form.   The elctrical pulse is specified through \(E(t) = E_0 \; \sin (\omega t)\) , \(E_0=1, \; \omega =2\) and a duration \(T = \frac{2\pi }{\omega } = \pi\).

From: J-Matrix time propagation of atomic hydrogen in attosecond fields