分析了一个运动的三能级原子与一个驻波激光场在斜交相互作用时的动量传递行为。结果表明，当原子和光场由于多普勒效应满足一定条件时，将产生受激拉曼跃迁。如果作用光相对于原子而言为一个“π/2脉冲”光时，那么经过作用后，原子将处于一个相干迭加态，其中一个态与初始态相同；另一个态为新态，并且原子动量增量为两倍单光子反冲动量。把这一机制应用于原子波干涉，那么它可用来实现原子波相干分裂。

A momentum transfer of a moving three level atom interacting slantingly with a standing wave laser field is analysed. The results have shown that a stimulated Raman transition will be dominated, when some conditions are met by both the atom and the light field. If the light field seen by the atom is a “π/2 pulse” light, the atom will be in a coherent superposition state after interaction, the one state is the same as the initial state of the atom, and another state is a new state in which the degrees of atomic internal freedom and the center-of-mass momentum of the atom are all changed, especially, the momentum is changed by twice single-photon recoil momentum. Nevertheless, the probability of the atom in the two states is the same. If this mechanism is used for atomic wave interferometry, it is possible that atomic wave packets are coherently splitted.