We analyze the angular momentum distribution of electrons near threshold in atomic ionization by short laser pulses. The radial fanlike pattern in the two-dimensional momentum distribution observed in experiments is controlled by the dominance of a few angular momenta of the order l₀. We find a semiclassical expression for l₀ strongly dependent on the quiver amplitude of the detached electron but independent of the atomic species. The value of l₀ can be also related to the minimum number of absorbed photons needed to reach the threshold. The strongly peaked sub-Poissonian angular distribution precludes a description by a stochastic random walk model in angular momentum.
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Arbó et al. (2008) studied this question.
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