Yarkony 1996 review: degenerate electronic states form conical-intersection seams; non-adiabatic transitions through intersection drive ultrafast photochemistry (ms -> fs); breaks BO approximation.
Yarkony 1996 review: degenerate electronic states form conical-intersection seams; non-adiabatic transitions through intersection drive ultrafast photochemistry (ms -> fs); breaks BO approximation.