Quasi-Classical Trajectory Study on Ar+H₂⁺/D₂⁺/T₂⁺ Reactions

In order to explore the isotope effect on stereodynamics, we investigate the trajectory calculations of Ar+H₂⁺, Ar+D₂⁺ and Ar+T₂⁺ reactions on the ab initio potential energy surface constructed by us and calculate the distributions of product polarization P(θ_r), P(φ_r) and four generalized polarization−dependent differential cross-sections. The product rotational alignment parameters <2(j'⋅k)> for the title reactions are compared and discussed with mass factors. Furthermore, the angular distributions of the product rotational vectors in the form of polar plot in θ_r and φ_r are presented. The results indicate that the stereodynamics properties of the title reactions are sensitive to the mass factor.