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Fragmentation of N2 in 410 nm Intense Femtosecond Laser Field
Wei Guo,Jing-yi Zhu,Yan-qiu Wang,Li Wang
Author NameAffiliationE-mail
Wei Guo State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China  
Jing-yi Zhu State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China  
Yan-qiu Wang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Li Wang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China liwangye@dicp.ac.cn 
Abstract:
Fragmentations of N2 in linearly polarized femtosecond 410 and 820 nm intense laser fields were studied by using the velocity mapping technique. Different behaviors of N2 at 410 and 820 nm were observed. Both the kinetic energy distributions and angular distributions of fragment ions in 410 nm field show weak dependency on laser intensities in the non-saturation regime, in contrast to the case in 820 nm. Different excited electronic states, i.e.,non-Coulombic potentials populated via vertical excitation, are suggested to play crucial roles in fragmentations at short wavelength.
Key words:  Velocity mapping, Non-Coulombic fragmentation, Energy distribution, Angular distribution
FundProject:
Fragmentation of N2 in 410 nm Intense Femtosecond Laser Field
郭玮,朱井义,王艳秋,王利 *
摘要:
用速度成像技术研究了氮分子在410和820 nm线偏振飞秒激光场中(1014 W/cm2)碎片化过程.N2在410 nm激光场中碎片化行为与820 nm激光场中不同,碎片离子的能量分布和角分布不随410 nm激光场强明显变化.氮分子在410 nm激光场中的碎片化过程主要是由垂直激发导致的非库仑态解离引起的.
关键词:  速度成像,非库仑碎片化,能量分布,角分布
DOI:10.1088/1674-0068/22/01/1-6
分类号: