Quasi-classical trajectory calculations on a fast analytic potential energy surface for the C(1D)+H2 reaction

Quasi-classical trajectory (QCT) calculations have been carried out on a new implementation of the first singlet state a(1)A' potential energy surface (PES) of the C(D-1) + H-2 system based on a set of 1748 ab initio points previously reported. The implementation is performed by using the Reproducing Kernel Hilbert Space (RKHS) interpolation method, which allows the fast evaluation of the PES values and, particularly, their gradients analytically. Although there is a general good correspondence between the present surface and the previous version, the new PES is free of spurious small scale features and permits a faster evaluation of the PES and its gradients. The QCT results on the present PES are in general good agreement with those obtain on the previous PES. (C) 2003 Elsevier Science B.V. All rights reserved.