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Fragmentation of N2 in 410 nm Intense Femtosecond Laser Field
Wei Guo1,2, Jing-yi Zhu1,2, Yan-qiu Wang1, Li Wang1
1.State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China
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
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附件
Fragmentation of N2 in 410 nm Intense Femtosecond Laser Field
郭玮1,2, 朱井义1,2, 王艳秋1, 王利 *1
1.中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023;2.中国科学院研究生院, 北京100049
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: