Atomic and Molecular Reaction Dynamic for UO₂ （X³∑_u⁺）

The aloud and molecular reaction dynamics for O(X³P_g)+UO(0, 0) and U(X⁵L_u)+O₂(0, 0) have been studied on the potential energy function of UO₂(X³∑_u⁺) by Monte-Carlo quasi-classical trajectory approach. It is shown that the reaction O(X³P_g) +UO(0, 0)→ UO₂(X³∑_u⁺) and U(X⁵L_u)→+O₂(0, 0)→UO(V', J')+O (X⁵P_g) all have no threshold energy. The mechanisms of formation a long-lived lutermediate is also discussed according to potential surface and their reactive trajectory.