Intense laser induced field ionization of C_(2)H_(2), C_(2)H_(4), and C_(2)H_(6)  

作　　者：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) 

出　　处：《Chinese Science Bulletin》2003年第16期1713-1717,共5页

基　　金：supported by the N ational Natural Science Foundation of China(Grant No.29973052);the Ministry of Science and Technology of China.

摘　　要：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.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.

关 键 词：电离模型 激光技术 乙炔电离 乙烯 乙烷 分光计 多原子分子 强激光场 

分 类 号：O644.18[理学—物理化学]