Ionization and dissociation of CH_2I_2 and CH_2ICl in femtosecond intense field  

作　　者：LIUZhenhong WANGYanqiu WANGLi HEGuozhong 

机构地区：[1]StateKeyLaboratoryofMolecularReactionDynamics,DalianInstituteofChemicalPhysics,ChineseAcademyofSciences,Dalian116023,China

出　　处：《Chinese Science Bulletin》2004年第24期2585-2589,共5页

摘　　要：Ionization and dissociation processes of gas molecules, CH2I2 and CH2ICl, in intense femtosecond field (1013—1015 W·cm?2), were investigated by flight time mass spectrometer, irradiated by 60 fs with 800 and 400 nm fem- tosecond laser. In the moderate intense field, CH2I2 and CH2ICl produced concerted elimination products, I2 and ICl molecules, respectively. The multiple charged ions, I2+, gen- erated in Coulomb explosion under intense femtosecond la- ser irradiation, split into three peaks in the flight time mass spectra, due to the initial kinetic energies released in the ex- plosion. The C-I internuclear distances during Coulomb ex- plosion and the kinetic energy released were estimated ac- cording to the flight time differences.Ionization and dissociation processes of gas molecules, CH2I2 and CH2ICl, in intense femtosecond field (1013—1015 W·cm?2), were investigated by flight time mass spectrometer, irradiated by 60 fs with 800 and 400 nm fem- tosecond laser. In the moderate intense field, CH2I2 and CH2ICl produced concerted elimination products, I2 and ICl molecules, respectively. The multiple charged ions, I2+, gen- erated in Coulomb explosion under intense femtosecond la- ser irradiation, split into three peaks in the flight time mass spectra, due to the initial kinetic energies released in the ex- plosion. The C-I internuclear distances during Coulomb ex- plosion and the kinetic energy released were estimated ac- cording to the flight time differences.

关 键 词：超速激光技术 多重电荷离子 库仑 CH2I2 分光计 电场 

分 类 号：TN20[电子电信—物理电子学]