Sp. Goreslavskii et Sv. Popruzhenko, Photoionization with rescattering: Quantum theory and the semiclassical approach, LASER PHYS, 10(2), 2000, pp. 583-587
We compare the spectral-angular distributions of photoelectrons in a high-e
nergy plateau of above-threshold ionization calculated in the tunneling lim
it within the framework of a semiclassical three-step model and obtained by
the saddle-point method. It is demonstrated that both procedures of calcul
ations give mathematically equivalent results, adequately describing the di
stribution of photoelectrons within the range predicted by the three-step m
odel, but become inapplicable near the boundaries of this range.