Intense laser induced field ionization of C_2H_2, C_2H_4, and C_2H_6
GAO Lirong1,2, JI Na1, XONG Yijia1, TANG Xiaoping1 & KONG Fan抋o1 1. Insistute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China; 2. Graduate School of Chinese Academy Sciences, Beijing 100039, China Correspondence should be addressed to Kong Fan抋o (e-mail: kong@ mrdlab.icas.ac.cn)
Using HOMO Field Ionization Model, the tun-neling probabilities and the theoretical threshold intensities of the field ionizations of acetylene, ethylene, and ethane in intense laser field are calculated. C2H2, C2H4, and C2H6 were irradiated by 800 nm, 100 fs laser pulses with the intensity range of 1013—1014 W/cm2. A TOF-mass spectrometer was coupled to the laser system and used to experimentally in-vestigate the field ionization of these molecules. The experi-mental ionization threshold intensities are obtained. The calculating results of the three molecules agree well with the experimental results, indicating that HOMO Field Ionization Model is valid for the ionization of polyatomic molecules in intense laser field.
【CateGory Index】： O644.18