Studies Of The Ionization/Dissociation Dynamics Of Carbon Disulfide By Femtosecond Pump-Probe Technique

Ionization/dissociation Dynamics of Carbon Disulfide by femtosecond Pump-Probe technique is an important subject these days. In the experiment, we continue to change the delay time of pump and probe light, obtained the relevant information of molecular'Rydberg states.Through the analysis of ionization and dissociation of CS 2 and discussion of production channels of parent ion and fragment ion ,We analyzed two possible reaction mechanism in the before and after zero time. Through integration of the peak points of parent ion and fragment ion , we found that they have the same trend, indicating fragment ions are obtained by dissociation of the parent ionBy the time evolution fitting of the parent ion and fragment ions , we find that there are the two reaction mechanisms in the before and after zero time. respectively. This shows that these two reactions which are the 266nm optical pump, 400nm probe and 400nm optical pump , 266nm probe are possible. By analyzing the information of the molecular , we got the two reaction mechanisms. By fitting the experimental data, we get the decay time of the parent ion is the life time of molecular Rydberg states of CS2 level. And, what we got is consistent with the previous results ,so this further illustrates the correctness of our conclusion.