Reaction mechanism of and its state-to-state quantum dynamics**Project supported by the National Natural Science Foundation of China (Grant Nos. 11674198 and 11504206), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2016AP14), and the Taishan Scholar Project of Shandong Province, China.

Abstract

The quantum state-to-state calculations of the reaction are performed on a potential energy surface of state. The state-resolved integral and differential cross sections and product state distributions are calculated and discussed. It is found that the rotational distribution, rather than the vibrational distribution, of the product has an obvious inversion. Due to the fact that it is a small-impact-parameter collision, its product D2 is mainly dominated by rebound mechanism, which can lead to backward scattering at low collision energy. As the collision energy increases, the forward scattering and sideward scattering begin to appear. In addition, the backward collision is also found to happen at high collision energy, through which we can know that both the rebound mechanism and stripping mechanism exist at high collision energy.