Time-dependent quantum dynamical study of C(1D)+H2→CH+H and S(1D)+H2→SH+H reactive collisions

A time-dependent method is used to calculate reaction probabilities for J = 0 for C(D-1) + H-2 (v = 0, j = 0) --> CH( v', j') + H and S(D-1) + H-2 (v = 0, j = 0) --> SH (v', j') + H indirect reactive collisions. The state-to-state probabilities are dominated by a strong resonance structure associated with the formation of a long-lived triatomic complex during the collision. We compare our results with those obtained using a time-independent hyperspherical coordinates method. The agreement is very good: in particular, the narrow resonances obtained with the wave packet method correspond exactly to those of the time-independent results.