Are semiclassical methods accurate for electronically nonadiabatic transitions between weakly coupled potential energy surfaces?

A study was conducted on the development of mixed quantal-classical techniques for explaining the dynamics of electronically nonadiabatic molecular processes. It extended a previous experiment where four semiclassical approaches were tested against precise quantal findings for three atom-diatom reactions involving conical intersections. This study tested the same four semiclassical methods against precise quantal findings for an atom-diatom reaction where the diabatic potential surfaces do not cross but are roughly parallel in the entrance channel.