【摘要】 本文在以前工作的基础上,继续讨论了多原子分子在红外激光场作用下产生多光子离解的机制,得到了分子各个振动模之间的非线性耦合方程组,以SF₆分子为例,数值计算了模-模间的能量转移时间、费密共振作用、各个模被激光场激发的程度,最后联系到单分子反应的模型,讨论了多原子分子的离解速率,基本上得到了与实验现象一致的结果。更多还原

【Abstract】 Based on our previous work[5], in this paper, we discuss further the mechanism of maltiphoton dissociation of polyatomic molecules in an intense infrared laser field, and obtain non-linear equations which describe the coupling between molecular vibrational modes. Taking SF6 molecule as an example, we calculate numerically the energy transfer time between modes, the Fermi resonance interaction, and the degree of mode excitation by laser field. Finally, the dissociation rate of polyatomic molecule is discussed based on the uni-molecular reaction model, the theortical results are essentially in agreement with experiments.更多还原