A quantum mechanical study of He+H2→He+H+H in the energy range 5–10 eV

The collision-induced dissociation process in He+H2 is studied quantum mechanically using the infinite-order sudden approximation. The dissociation cross sections for the initial vibrational states v=0–9 are reported in a wide range of the total energy 5–10 eV and the rate constants are calculated in the temperature range 1000–10000 K. The dissociation cross sections are strongly dependent on v. It is found that the details of interaction potential strongly affect the dissociation dynamics for low v. The reliability of the classical trajectory method is discussed.