The interatomic distances are used as coordinates for atom-diatom quantum reactivescattering. After mass scaling, coordinate rotation and transforming into hypersphericalcoordinates, the equation for quantum reactive scattering has a form similar to that forinelastic scattering. In this description, the chemical reactive system changes naturally anduniformly from the reactant state to the product state, no coordinate transformation betweendifferent arrangement channels being required.
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