中文摘要：

反应共振或Feshbach共振是化学反应动力学中最有吸引力的现象之一．在20世纪70年代，Schatz等用量子散射理论计算预言过基元化学反应中存在共振现象；在实验方面，Neumark等。利用过渡态活化络合物前驱负离子的高分辨光分离光谱研究三原子反应中的共振，例如，I＋HI→IH＋I反应；

英文摘要：

Reaction resonance or Feshbach resonance in polyatomic reaction is one of the most fascinating phenomena in chemical reaction dynamics. The HO ＋ CH4→HO ＋ CH3 reaction is one of the pivotal polyatomic reactions concerned with both the experimental and theoretical scientists. Reaction probabilities and other dynamic properties of this system were calculated with quantum scattering theory method, but a simple QH（v） ＋ HO（j）→Q ＋ H2O（m,n） reaction model was used, in which only three degrees of freedom and the rotating of OH were considered while making CH3 as a pseudo atom. In this paper, by an ab initio method, partial potential energy surface（PPES） was constructed and all the 15 internal degrees-freedom were given. Feshbach resonance mechanism of this reaction can be obtained by the dynamic Eyring Lake on the PPES and the lifetime of the reactive resonance-state can be estimated using the gap of the vibrational energy levels of transient collision complex in the critical transition-state region. Above interesting dynamic properties would not be given by simple pseudo atomic reaction model.