用共振多光子电离技术测量分子动力学参数

Measurements of dynamic parameters of molecules by resonant multiphoton ionization technique

理论上推导出在三光子共振四光子电离过程中,电离流与多光子动力学参数的关系.首次提出用共振多光子电离技术获得三光子吸收截面、四光子电离截面以及无辐射弛豫速率参数法.实验测量了气相甲苯分子里德堡态的上述动力学参数.结果在理论预期的数量级范围内.

In this paper, we deduced theoretically the relation between ion current and multiphoton dynamic parameters in (3+1)RMP1 process and presented a method for obtaining three-photon absorption cross section, four-photon ionization cross section and radiationless relaxation rate by RMPI technique. The dynamic parameters of Rydberg states of toluene in gas phase are experimentaly measured for the first time. The results agree with the typical expected range of magnitudes.