随着现代科学技术的发展,人们对化学反应动力学的研究已从宏观进展到微观。本文论述了如何利用分子束来研究微观反应动力学的实验技术和反应理论。在实验技术方面主要介绍交叉分子束实验和产物散射密度分布图,并根据实验结果分别对直接反应碰撞和碰撞络合物等反应理论进行了讨论,其中对旁观者剥裂机理、鱼叉机理和反弹机理的讨论尤为详细。 With the development of modern science and technology, the research on chemical reaction kinetics has gone from macroscopic to microscopic. In this paper, we discuss how to use molecular beam to study the experimental techniques and reaction theory of microscopic reaction kinetics. In the field of experimental technology, the cross molecular beam experiment and the product scattering density distribution are mainly introduced. The reaction theory of direct reaction collisions and collisional complexes are discussed respectively according to the experimental results. The mechanism of bystander stripping, The rebound mechanism is discussed in great detail.