The symmetry of rotation-vibration states of diatomic N2 and O2 are disoribed by means of the chain of subgroups U(4) U(3) O(3) . The transition matrix elements of rotational Raman scattering are calc ulated by means of the group theory approach.

• 本文利用群链U(4)U(3)O(3)描述双原子分子N_2和O_2振转谱的对称性质,并利用群论方法计算了N_2和O_2分子转动喇曼散射的跃迁矩阵元,给出了它们的转动喇曼散射的截面。