CS_2分子激发态的紫外多光子电离——双色激光单共振离化的功率密度关系  

UV multiphoton ionization of excited state of CS_2 molecule——Intensity dependence of two-colorlaser single resonance ionization

作　　者：范俊颖[1] 刘亚淑[1] E.Patsilimakou C.Fotakis 

机构地区：[1]中国科学院上海光学精密机械研究所量子光学联合实验室 [2]Institute

出　　处：《光学学报》1989年第11期978-982,共5页Acta Optica Sinica

摘　　要：本文报道气相CS_2紫外双色激光单共振离化的功率密度关系和对高激发态(1~Ⅱg),共振离化特性的研究结果,实验指出通过中间共振态(1~Ⅱ_g)的双光子共振激发三光子离化具有比通过中间共振态((?)A_2)的单光子共振激发三光子离子为高的总离化率,在10~7W/cm^2的功率密度下,观察到饱和效应.实验显示了双色激光单共振离化功率密度关系的研究提供了一种新的光谱学分析方法.这对研究分子高激发态的结构是很重要的.The intensity dependence of two-color laser single resonance UV photon ionization of gag phase CS2 and the features of resonance ionization of higher excibedstate (1∏g) are presented in this paper.The experiment shows that the total ionization cross-section of three-photon ionization with two-photon resonance excitation via the intermediate state, 1∏g, is higher than that with one-photon resonance excitation via the lower state, a-3A2.The saturation effect was observed under the laser intensity of 107W/cm2. The results indicate that by measuring the intensity dependence of two-color laser single resonance ionization, a new method for speotroscopic analysis was developed. This would be significant in the study of molecular structure at high excited state.

关 键 词：多光子电离 分子激发态 二硫化碳 

分 类 号：TN244.01[电子电信—物理电子学]