Examination of the Landau-Zener approximation in reactive atom-diatom collisions

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Abstract
In order to examine the application of the Landau-Zener (LZ) approximation to atom-diatom collisions, the electronic transition induced by a strong laser field is considered for the F(2 P 3/2), F(2 P 1/2) + H2 + hθ systems. Comparison between the LZ transition probabilities and those obtained by numerical solution of the exact semiclassical (SC) equations demonstrates significant differences, the most important being found in the case of the F(2 P 1/2) + H2 + hθ, hθ = 0·117 eV system, where the LZ probability changes smoothly with translation energy, while the SC probability has deep minima.